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CPT International 02/2017

The leading technical journal for the global foundry industry – Das führende Fachmagazin für die weltweite Gießerei-Industrie

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www.giesserei.eu<br />

June<br />

<strong>2017</strong><br />

CASTING<br />

PLANT AND TECHNOLOGY<br />

INTERNATIONAL<br />

2<br />

FRP – the digital transformation<br />

of metal casting industry


EDITORIAL<br />

Adjusting screws<br />

to optimize casting!<br />

In the foundries of the 21st century it is no longer merely a matter of mass<br />

production with maximum productivity, but increasingly making castings of<br />

higher quality, with greater energy efficiency, greater flexibility – and thus<br />

increased future-orientation. The issue that you are currently holding offers<br />

some examples of this. There is, for example, the expert analysis by Heinz<br />

Kadelka from Linde Gas in Düsseldorf, who has examined the current possibilities<br />

of pre-warming ladles by means of porous burners and natural gas oxygen<br />

burners. Turn to P. 10 to find out which burner system could optimize<br />

your casting process.<br />

The specialist article by Steffen Geisweid and Dennis Wolzenburg from Heinrich<br />

Wagner Sinto is another highlight. They report on the installation of a<br />

high-tech EFA-SD Seiatsu.plus molding plant and P-30-M casting plant at<br />

M. Busch in Wehrstapel, Germany. These so-called Foundry 3plus systems<br />

represent the current state-of-the-art in modern molding plant construction.<br />

Find out more on P. 20.<br />

There are also numerous possibilities for improving casting technology –<br />

whether by optimizing production with ANSYS Space-Claim software, used at<br />

Eisenwerke Erla in Schwarzenberg (from P. 24), by simulating castings with<br />

Magmasoft at the large Chinese FAW automotive foundry in Changchun (from<br />

P. 26), or through the use of 3-D printers at the Industry 4.0 Christenguss<br />

foundry in Switzerland (from P. 30). The aims that they all share are always<br />

greater flexibility, higher quality, and the maximum possible exploitation of<br />

design freedom during casting.<br />

This issue is also dedicated to a topic that is sometimes only mentioned at the<br />

fringes of the foundry sector, but which should receive far more attention:<br />

safety at work. The global player Georg Fischer (GF) from Schaffhausen in Switzerland<br />

has declared war on sources of danger at foundries with its zero-risk<br />

campaign: awareness of this topic among the workforce has been raised with<br />

poster motifs and a variety of events. The result: the accident rate has fallen<br />

considerably. Tina Köhler, head of communications at GF, stresses that many<br />

people still consider foundries to be dangerous places. “We need to get away<br />

from this image, so we have to do something about safety at work,” she is<br />

convinced. More about this on P. 32.<br />

Have a good read !<br />

Robert Piterek<br />

e-mail: robert.piterek@bdguss.de<br />

Casting Plant & Technology 2 / <strong>2017</strong> 3


FEATURES<br />

INTERVIEW<br />

with Christopher Boss<br />

“EUROGUSS is to become an even better refection of the industry” 6<br />

MATERIALS<br />

Strunz, Alexander<br />

High-performance tungsten-based materials enable<br />

improved casting process 8<br />

Cover-Photo:<br />

RGU GmbH<br />

Karl-Harr Str. 1<br />

44263 Dortmund<br />

Tel.: +49 (0) 231 419970<br />

Fax: +49 (0) 231 41997-99<br />

info@rgu.de<br />

www.rgu.de<br />

The software company RGU, which has<br />

provided the cover image to us, focuses<br />

exclusively on foundries. FRP stands for<br />

Foundry Resource Planning (derived from<br />

Enterprise Resource Planning, ERP). Read<br />

more on RGU on page 43.<br />

MELTING SHOP<br />

Kadelka, Heinz; Weber, Mike<br />

Ladle heating examined under the aspects of energy<br />

<br />

CASTING TECHNOLOGY<br />

Geisweid, Steffen; Wolzenburg, Dennis<br />

Commissioning of Foundry 3plus at M. Busch in Wehrstapel 20<br />

SIMULATION<br />

Tosse, Thomas<br />

Quicker solution concepts with ANSYS SpaceClaim 24<br />

Baosheng, Lu<br />

Manufacturability of a cylinder block sand core 26<br />

<br />

xx 10 xx 20<br />

How do porous burners perform in camparison to natural<br />

<br />

Linde Gas and Gienanth foundry (Photo: Linde Gas)<br />

With the commissioning of Foundry 3plus the German<br />

foundry M.Busch has made one of the largest investments<br />

of its company history (Photo: M. Busch)


CASTING<br />

2 | <strong>2017</strong><br />

PLANT AND TECHNOLOGY<br />

INTERNATIONAL<br />

AUTOMATION<br />

Dizdarevic, Mirela<br />

On the way to “Casting 4.0” 30<br />

WORK SAFETY<br />

Piterek, Robert<br />

On course for a new safety culture 32<br />

CLEANING, FETTLING & FINISHING<br />

Paarmann, Ralf<br />

The future is big! 36<br />

COMPANY<br />

Beste, Dieter<br />

Matthies Druckguss: combining tradtion with innovation 40<br />

COLUMNS<br />

Editorial 3<br />

News in brief 43<br />

Brochures 48<br />

Fairs and congresses/Ad index 50<br />

Preview/Imprint 51<br />

xx 30<br />

With its vision of Guss 4.0, Christenguss AG of Bergdietikon in Switzerland is also blazing the trail into a digital future. The<br />

foundry manufactures complex sand casting molds in a 3-D printing process. Florian Christen, CEO of a traditional family<br />

business in its fourth generation sees his company as an innovation technology leader (Photo: Christenguss AG)


INTERVIEW<br />

“EUROGUSS is to become an even<br />

better refection of the industry”<br />

From 16 to 18 January 2018, the European die castings sector will meet once again in Nuremberg<br />

at the EUROGUSS trade fair. The exhibitors’ applications are ongoing, the trade fair preparations<br />

in full swing. We spoke to Christopher Boss (31), the new Director Exhibitions, about the<br />

development of EUROGUSS and the international involvement of the NürnbergMesse Group in<br />

the die casting sector. Boss has a degree in business science, has been in the trade fair and exhibition<br />

branch for around 10 years and has worked for NürnbergMesse for around one year.<br />

EUROGUSS 2016 was the most successful<br />

ever staged. With around 580 exhibitors,<br />

more than 12,000 visitors and<br />

the additionally-occupied exhibition<br />

hall, it set new records. You recently<br />

took over as Director Exhibitions from<br />

Heike Slotta, who in future – continuing<br />

her strong bond with EUROGUSS<br />

– will be increasingly involved strategically.<br />

Which objectives have you set<br />

yourself for the coming fair?<br />

In Europe, EUROGUSS is the leading trade<br />

fair for the entire die-casting value-added<br />

chain: from raw materials through to<br />

technology and processes up to finished<br />

products. I was fortunate to immediately<br />

experience the fair live already in my<br />

second week at work and I’m delighted<br />

to continue to be involved in future in<br />

shaping this meeting place which is recognized<br />

and popular in the sector.<br />

In terms of both exhibitors as well as<br />

visitors, EUROGUSS has in recent years<br />

recorded impressive growth rates. My<br />

objective, together with the team, is to<br />

continue this growth trend. In 2018,<br />

we are seeking to break the 600-mark<br />

for exhibitors and further increase internationality.<br />

How would you like to reach this objective?<br />

Since I started at NürnbergMesse, I’ve<br />

been travelling a lot to customers and<br />

events at home and abroad. I have conducted<br />

numerous, interesting, specialist<br />

discussions and meetings aimed at<br />

getting to know the sector better and<br />

finding out which adjustments we can<br />

make in order to establish EUROGUSS<br />

even more strongly as a mirror for<br />

Christopher Boss is new Director Exhibitions of the EUROGUSS Trade fair in Nuremberg,<br />

Germany (Photo: NürnbergMesse)<br />

the sector. We will retain the product<br />

range core of the event, but further<br />

extend the range depth. The focus of<br />

EUROGUSS will continue to be Europe.<br />

Of course, die casting is in particular<br />

dependent on the automotive sector,<br />

but we will also be increasingly inviting<br />

target groups from other sectors to<br />

EUROGUSS, for whom the die casting<br />

process with its many advantages offers<br />

a genuine alternative.<br />

Are there changes to the trade fair<br />

concept?<br />

The EUROGUSS concept has proved<br />

itself most effectively. This is confirmed<br />

to us not only by the fantastic<br />

exhibitor and visitor figures from the<br />

last event, but also by the top ratings<br />

awarded in the exhibitors’ and visitors’<br />

survey. 98 % of the visitors surveyed<br />

stated that they were satisfied with the<br />

range presented at the fair and 94 % of<br />

exhibitors assess their trade fair participation<br />

as an overall success. So we<br />

should not tinker with the trade fair<br />

concept in general. Nevertheless, it is<br />

necessary to further refine the concept<br />

and extend the trade fair range to include<br />

attractive formats.<br />

What should exhibitors and visitors<br />

look forward to at the next EURO-<br />

GUSS in 2018?<br />

The exhibitors’ applications process<br />

is going very well. Three quar-<br />

6 Casting Plant & Technology 2 / <strong>2017</strong>


ters of exhibition space is already<br />

booked around 10 months before<br />

the event. Many exhibitors have enlarged<br />

their stands. Of course, all the<br />

market leaders are once again present,<br />

but new exhibitors are also on<br />

board. The theme of surface technology,<br />

which was highlighted for<br />

the first time at EUROGUSS 2016, is<br />

being extended further and presented<br />

in a pavilion. The “Forschung, die<br />

Wissen schafft” (Research for Knowledge)<br />

special show, where the latest<br />

research projects from universities<br />

and technical colleges are presented,<br />

has been popular with the trade visitors<br />

for years. It too will of course also<br />

be part of the event again. The exhibitors<br />

and visitors can also look forward<br />

to interesting lectures and presentations<br />

on current themes and issues<br />

at the “<strong>International</strong>er Deutscher<br />

Druckgusstag” (<strong>International</strong> German<br />

Die Casting Congress) specialist<br />

event, which is being organized by<br />

our esteemed partner, the Verband<br />

Deutscher Druckgießereien (VDD,<br />

Association of German Die-Casting<br />

Foundries).<br />

There will be excitement surrounding<br />

the award presentations for the<br />

<strong>International</strong> Aluminium Die Casting<br />

Competition and the Zinc Die<br />

Casting Competition. As you can see,<br />

there is once again a great deal on offer<br />

at EUROGUSS.<br />

In addition to EUROGUSS in Nuremberg,<br />

the NürnbergMesse Group,<br />

within the framework of its internationalization<br />

strategy, has indeed for<br />

several years also been successfully<br />

staging die casting trade fairs and<br />

exhibitions worldwide, for example<br />

in China and India. What advantages<br />

does that bring to the company?<br />

Yes, that is correct. For several years,<br />

the NürnbergMesse Group has been<br />

strengthening the positioning of its<br />

successful events at the home location<br />

of Nuremberg through so-called<br />

product families worldwide. That<br />

means in the case of EUROGUSS that<br />

this event is functioning as the mother<br />

of the product family so to speak<br />

and has offshoots in attractive foreign<br />

markets outside Europe. As an<br />

international product manager, I am<br />

trying to make use of the synergy effects<br />

between the individual members<br />

of the product family in the various<br />

markets. It is important for us that<br />

these events are always perfectly tailored<br />

to the requirements of their respective<br />

markets. We are accompanying<br />

our customers on their way into<br />

these exciting and prospering markets<br />

and offering them the proven exhibition<br />

quality and service they are<br />

familiar with from Nuremberg. In this<br />

connection, for example last December,<br />

the largest die casting trade fair<br />

in India was held with around 140<br />

exhibitors, ALUCAST, organized and<br />

staged by NürnbergMesse India. According<br />

to forecasts, the Indian die<br />

casting market offers great growth<br />

potential for European companies.<br />

The date for the next ALUCAST is 6<br />

to 8 December 2018 in Delhi. In China<br />

too, the largest die casting market<br />

in the world, we have been active<br />

since 2013 and are involved in shaping<br />

the dynamic development of the<br />

CHINA DIECASTING trade fair in<br />

Shanghai through our subsidiary<br />

NürnbergMesse China. Last year,<br />

CHINA DIECASTING registered 295<br />

exhibitors and 12,<strong>02</strong>7 trade visitors.<br />

The next fair will be held from 19 to<br />

21 July <strong>2017</strong>. We are expecting around<br />

350 exhibitors and 15,000 trade visitors.<br />

www.nuernbergmesse.de/en<br />

your competent partner<br />

for Cast Iron !<br />

Gray cast iron up to 70 t<br />

Nodular cast iron up to 50 t<br />

Steel cast<br />

up to 6 t<br />

Mechanical processing<br />

Painting<br />

Dimensions: length: 14,5 m<br />

Ø 7 m<br />

weight 70 t<br />

EMDE Industrie-Technik GmbH D-39418 Staßfurt<br />

+49 (0) 39 25 - 985 0 www.emde.de info@emde.de<br />

Casting Plant & Technology 2 / <strong>2017</strong> 7


MATERIALS<br />

Alexander Strunz, Munich<br />

High-performance tungsten-based<br />

materials enable improved casting<br />

process<br />

Bayerische Metallwerke GmbH, Dachau, Germany, offers an innovative material for casting tool<br />

construction with its product family Triamet A, a tungsten-based heavy metal alloy that can<br />

withstand more frequent temperature changes<br />

Fire cracks and corrosion are the most<br />

common types of casting tool damage<br />

in light metal casting. Usually such damage<br />

reduces product quality, which may<br />

worsen even further under some circumstances<br />

due to adhesion or inadequate<br />

heat dissipation. With its Triamet A product<br />

family, a tungsten-based heavy metal<br />

alloy, Bayerische Metallwerke GmbH offers<br />

an innovative and ecological alternative<br />

that avoids these problems. Thanks<br />

to a tungsten content of up to 98 %, the<br />

Triamet A materials withstand the stresses<br />

of frequent temperature changes in<br />

the casting process over the long term<br />

and set themselves apart with high corrosion<br />

resistance compared to aluminium<br />

and copper alloys.<br />

With many types of hot work steel<br />

used in light metal casting for the production<br />

of tools, the hardness and<br />

strength decrease relatively quickly<br />

due to the high thermal stresses. Crack<br />

formation caused by thermal fatigue of<br />

the material is common. This can reduce<br />

the quality of the end product<br />

and lead to significant financial costs<br />

The Triamet A materials are used primarily in<br />

gravity diecasting and high-pressure diecasting,<br />

for instance for the production of aluminium<br />

rims and cylinder heads<br />

(Photos: Wolfram Industry)<br />

8 Casting Plant & Technology 2 / <strong>2017</strong>


and time expenditures for repair work<br />

and loss of use.<br />

With the Triamet A product series,<br />

Bayerische Metallwerke GmbH offers<br />

various tungsten-based alloys that can<br />

avoid these problems. Tools made of<br />

Triamet A are highly resistant to liquid<br />

aluminium and magnesium. This can<br />

increase the service life by 10 to 500<br />

times compared to conventional materials,<br />

depending on the field of application<br />

and the type of casting process.<br />

The negligibly small alloy formation<br />

tendency and the formation of a natural<br />

separating layer counteract sticking<br />

of the work piece to the casting mold,<br />

which has a positive impact on product<br />

quality as well.<br />

Low thermal expansion co-<br />

<br />

Fire cracks in casting molds are caused<br />

mainly by thermal fatigue due to alternating<br />

compressive and tensile stress<br />

on the tools. The lower the thermal<br />

conductivity and the higher the thermal<br />

expansion coefficient of a material,<br />

the greater this stress will be. Compared<br />

to the commonly used steel, the<br />

thermal conductivity of Triamet A at<br />

70 to 105 W/mK is about 3 to 5 times<br />

higher while the thermal expansion<br />

coefficient at 5.2-6.5 [10 -6 K -1 ] is simultaneously<br />

only about 50 %. This greatly<br />

reduces stresses in the tool. The high<br />

resistance to temperature changes significantly<br />

reduces the fire cracking tendency<br />

and therefore greatly increases<br />

the service life.<br />

<br />

<br />

binder phase<br />

Bayerische Metallwerke GmbH uses a<br />

nickel and iron binder phase (Figure 1)<br />

for the production of Triamet A, added<br />

to the tungsten powder at the rate of 2<br />

– 10 %. Nickel acts as a catalyst that accelerates<br />

diffusion processes on the surface<br />

of the tungsten power and thereby<br />

reduces the sintering temperature by<br />

about 1,000 °C. Subsequently the Triamet<br />

green parts are sintered at about<br />

1,500 °C – in contrast to the 2,500 °C<br />

required for pure tungsten – so that a<br />

unique microstructure with a spherical<br />

tungsten phase encased by the<br />

binder phase is formed. All Triamet A<br />

series products set themselves apart<br />

with a very high density from 17.0<br />

± 0.15 g/cm 3 for Triamet A17 to about 18.8<br />

± 0.2 g/cm 3 for A19.<br />

The Triamet A materials are used<br />

primarily in gravity die casting and<br />

high-pressure die casting, for instance<br />

for the production of aluminium rims<br />

and cylinder heads.<br />

Figure 1: The lower the proportion of the binder phase, the higher the density will be.<br />

However, the ductility of the heavy metal also increases as the binder proportion rises<br />

http://wolfram-industrie.de/en<br />

Casting Plant & Technology 2 / <strong>2017</strong> 9


used for ladle heating and holding at operating temperature (Photos & Graphics: Linde Gas)<br />

Heinz Kadelka, Linde Gas, Düsseldorf, and Mike Weber, Gienanth GmbH, Eisenberg<br />

Ladle heating examined under the<br />

<br />

cost optimization<br />

<br />

<br />

ers<br />

employed to heat ladles used for pouring and treating melts of grey cast, ductile or compacted<br />

graphite iron<br />

Field experiment<br />

The objectives of the experiment were to<br />

examine the economic efficiency, flexibility,<br />

energy efficiency, service life, sintering<br />

and temperature changes during<br />

and associated with ladle heating. The<br />

tests were conducted with a 4-t pouring<br />

ladle for cast iron melts. They involved<br />

the heating of the ladle by porous burners<br />

and natural gas/oxygen burners.<br />

Background<br />

Ladles account for a significant share of<br />

the total energy input in iron melting<br />

processes. They have to be heated to operating<br />

temperature and then continu-<br />

10 Casting Plant & Technology 2 / <strong>2017</strong>


above the inside bottom<br />

All in<br />

one line<br />

M3: In the middle of the refractory<br />

<br />

inside bottom<br />

<br />

<br />

the inside bottom<br />

Figure 1:<br />

ously held at that temperature. This is<br />

to be performed with maximum efficiency<br />

and flexibility, while subjecting<br />

the ladle to fewest possible temperature<br />

changes, in order to maximize the lining<br />

life and minimize ladle repair.<br />

980<br />

900<br />

Temperature measurement in the<br />

<br />

<br />

Test set-up<br />

Figure 1 shows the positions of the<br />

thermocouples in the refractory lining<br />

of the 4-t pouring ladle.<br />

Inherent energy content of<br />

a pouring ladle at operating<br />

temperature<br />

Through-heating of a ladle depends<br />

largely on the heat content of the refractory<br />

material, especially the superheating<br />

of the inside surface zone. After<br />

the molten metal has been filled<br />

into the ladle, the thermal energy<br />

from the melt is introduced into the<br />

ladle and transferred towards the outside<br />

via the refractory lining. Especially,<br />

the reading at measuring point M 1,<br />

at 2.5 cm from the inside refractory surface,<br />

shows a pronounced temperature<br />

rise (approx. 970 °C; Figure 2) after the<br />

molten iron has been filled into the ladle.<br />

For the here presented experiment,<br />

the ladle was filled with 3 t of molten<br />

iron, simulating optimal through-heating.<br />

After 8 min, the melt was poured.<br />

At that stage, the first 2.5 cm of the refractory<br />

lining thickness were superheated<br />

(Figure 3). Within this surface<br />

layer of only 2.5 cm thickness, a temperature<br />

difference of more than 550 °C<br />

Temperature in °C<br />

820<br />

740<br />

660<br />

580<br />

500<br />

<br />

M3<br />

<br />

M2<br />

<br />

420<br />

12:01:26 12:<strong>02</strong>:53 12:04:19 12:05:46 12:07:12 12:07:12 12:10:05 12:11:31 12:12:58<br />

Figure 2: Heating of the refractory lining by the melt for approx. 8 min. Thermal be-<br />

<br />

the iron melt in the ladle at 12 o’clock: 1,501 °C<br />

between the surface and M 1 was measured.<br />

In case of ladle preheating by<br />

burners, it is recommended that care<br />

should be taken to ensure that this heat<br />

content be input by the burner. Otherwise<br />

it would be extracted from melt.<br />

Time in min<br />

Resistance to temperature<br />

changes<br />

When ladles are being filled with molten<br />

metal, the inside surface layer of the<br />

ladles heats up. The temperature transfer<br />

from the melt is lower when the temperature<br />

of this layer is already at a high<br />

level before the molten metal is filled in,<br />

(figure 3). When this layer is “cold” or<br />

has not been heated up to a sufficiently<br />

high level, the temperature changes<br />

will be great, leading to early wear,<br />

short lifetimes and slag caking in the ladles.<br />

After pouring, this energy content<br />

is transferred into the interior of the refractory<br />

lining via the superheated surface<br />

zone, as shown in figure 3.<br />

Casting Plant & Technology 2 / <strong>2017</strong> 11


MELTING SHOP<br />

Cooling down of the refractory<br />

material<br />

In Figure 4, this process can be observed<br />

to take place at M 3 for a period<br />

of approximately 30 min from 14:04 to<br />

14:20 h. The thermal energy is introduced<br />

into the refractory material like a<br />

wave, resulting in a rise in temperature.<br />

The superheated mass in the surface layer<br />

of the refractory lining (walls and bottom)<br />

can be assumed to amount to more<br />

than 200 kg. Heat content: approx. 4 to<br />

5 m 3 of natural gas. Even if the inside ladle<br />

surface is already “cold” (dark red),<br />

a few millimeters down into the refractory<br />

lining temperatures clearly above<br />

1,200 °C must be expected.<br />

Criteria for the comparison<br />

The basic objective was to achieve natural<br />

conditions as described above<br />

as “the inherent energy content of a<br />

pouring ladle at operating temperature”.<br />

For the investigated 4-t pouring<br />

ladle, the temperature level in the middle<br />

of the refractory lining was used as<br />

a basis of reference. The objective was<br />

to heat the ladle by means of the different<br />

burner systems in such a way<br />

that these temperatures were reliably<br />

reached and held at a constant level.<br />

During the experiment, at measurement<br />

point M3 in the middle of the refractory<br />

lining temperatures between<br />

approx. 640 °C and approx. 660 °C<br />

were measured. At M1 near the inside<br />

surface, temperatures above 820 °C<br />

were to be reached, in order to achieve<br />

the same temperature level as a ladle in<br />

the actual production process.<br />

Temperature in °C<br />

1600<br />

1440<br />

1280<br />

1120<br />

960<br />

800<br />

<br />

<br />

0 5 10 15 20 25 30<br />

Distance from inside surface in mm<br />

Figure 3: Heat transfer into the inside refractory surface zone (2.5 mm); M1 the surface<br />

temperature corresponds to the molten iron temperature, idealized (after “8 min”)<br />

Temperature in °C<br />

850<br />

800<br />

750<br />

14:04:53<br />

854°C<br />

<br />

700<br />

15:04<br />

M3<br />

652 °C<br />

650 639°C<br />

605 °C<br />

600<br />

550<br />

M2<br />

559 °C<br />

572 °C<br />

500<br />

14:<strong>02</strong>:24 14:09:36 14:16:48 14:24:00 14:31:12 14:38:24 14:45:36 14:52:48 15:00:00<br />

Time in min<br />

Figure 4: Temperature curves after the melt was poured, with the ladle covered and<br />

without use of burner<br />

Preliminary considerations<br />

concerning the ladle management<br />

and current practice<br />

Ladle heating by means of porous<br />

burners, as currently practiced in the<br />

foundry, was used as the reference for<br />

assessing the economic efficiency. Actually,<br />

the current situation could already<br />

be optimized by simple means,<br />

e.g. improved ladle covering in connection<br />

with a precisely controlled<br />

natural gas/air ratio. Also thermocouples<br />

installed in the ladle lid, which<br />

would control or interrupt the operation<br />

of the burner as required after<br />

reaching the pre-defined temperatures,<br />

would provide an improvement.<br />

Creating awareness among the operating<br />

staff may also lead to a significant<br />

reduction in energy use. Only after<br />

these conventional measures have<br />

been implemented should the reference<br />

situation be re-defined. This situation<br />

should be used as decision basis<br />

for future heating strategies. The comparison<br />

was based on the neutral cost<br />

assumption, including of course technical<br />

oxygen costs. Generally, it is attempted<br />

to achieve an optimal or physically<br />

feasible situation as well as the<br />

effect of “near-surface zone superheating”,<br />

in a cost-neutral way no matter<br />

which type of burner system was used.<br />

Heating of the 4-t pouring ladle<br />

by natural/gas oxygen<br />

burners (oxyfuel burners)<br />

After 90 min, the self-defined target<br />

was reached attaining a temperature of<br />

649 °C. At 2.5 cm from the inside surface,<br />

the temperature reached 832 °C<br />

(Figure 5), which corresponds to the<br />

12 Casting Plant & Technology 2 / <strong>2017</strong>


MELTING SHOP<br />

temperature attained in the ladle at operating<br />

temperature after melt filling (figure<br />

2: 823 °C). The surface temperature of<br />

the refractory lining was securely above<br />

1,550 °C, which is in line with other measurements.<br />

The burner achieved a degree<br />

of efficiency (ETA v) of 71 %.<br />

Heating of the 4-t pouring ladle<br />

by porous burners<br />

Porous burners<br />

The current design provides the possibility<br />

of individual height adjustment.<br />

The burner roof is suitable for almost<br />

all ladle diameters. The ladles are covered<br />

in such a way that there is only a<br />

small open gap at the circumference.<br />

Waste gas removal is via a tube integrated<br />

into the roof. The combustion<br />

gas and the combustion air are guided<br />

through porous ceramic material<br />

and ignited inside a high-temperature-resistant<br />

stainless steel tube. The<br />

tube, which is connected with the ladle<br />

lid, is lowered down into the ladle<br />

until the burner sits on the ladle rim.<br />

The combustion gases will then rise between<br />

the inside ladle wall and the outside<br />

burner tube.<br />

Constraints<br />

For material-technological reasons,<br />

the gas temperature must not exceed<br />

a certain limit. In the experiment,<br />

the temperature was not to exceed<br />

1,000 °C (thermocouple at the outside<br />

of the burner tube). Iron foundry<br />

Gienanth in Eisenberg defined the<br />

target temperature at 1,000 °C (taking<br />

into account design-related and material-specific<br />

requirements to avoid excessive<br />

thermal stress).<br />

Parameters of the experiments<br />

Natural gas input was determined to<br />

be 12.44 m 3 /h; the maximum temperature<br />

measured at the surface of<br />

the burner tube was 1,<strong>02</strong>0 °C. The maximal<br />

waste gas temperature was just below<br />

1,000 °C. From these facts it can<br />

be derived that heat transfer into the<br />

refractory material does take place at<br />

this temperature.<br />

Achievement of target temperatures<br />

at the measuring points in the refractory<br />

lining<br />

Refractory temperature in °C<br />

With a total energy input of 56 m 3 of<br />

natural gas and after an average heating<br />

time of 4.5 h , 538 °C were measured<br />

at M3 in the middle of the refractory<br />

lining. At 2.5 cm from the<br />

inside surface, 650 °C were measured<br />

(M1, ). The efficiency relative<br />

to the temperature in the middle<br />

of the refractory lining was calculated<br />

to amount to approx. 47 %. The porous<br />

burner failed to reach the target<br />

of heating the ladle to operating temperatures<br />

(> 640 °C) at neutral costs<br />

(538 °C). Consequently porous burners<br />

are unable to achieve the effect of<br />

surface zone superheating.<br />

General comparison of the<br />

preheating performance<br />

After approx. 4.5 h (270 min), heating<br />

by means of the porous burner<br />

achieved a temperature of 538 °C (ETA<br />

v 47 %). In contrast, the oxyfuel burner<br />

achieved this temperature already after<br />

1.22 h (73 min), (ETA v 71 %). The<br />

oxyfuel burner reached the temperature<br />

level of the porous burner (538 °C)<br />

with approx. 10 % less energy costs (in-<br />

Figure 5: Heating of a 4-t ladle to operating temperature by means of a natural gas/oxy-<br />

2<br />

Refractory temperature in °C<br />

680<br />

560<br />

440<br />

320<br />

200<br />

1000<br />

800<br />

600<br />

400<br />

200<br />

0<br />

<br />

Start<br />

<br />

<br />

<br />

10:04:48 10:19:12 10:33:36 10:48:00 11:<strong>02</strong>:24 11:16:48 11:31:12 11:45:36 12:00:00<br />

<br />

<br />

<br />

Start<br />

<br />

<br />

Time axis in min<br />

Heating curve of a porous burner. Comparison of a porous burners with an O 2<br />

burner<br />

M3<br />

M2<br />

<br />

<br />

<br />

<br />

<br />

80<br />

08:24:00 09:36:00 10:48:00 12:00:00 13:12:00 14:24:00<br />

M3<br />

M2<br />

Heating time in min<br />

<br />

<br />

14 Casting Plant & Technology 2 / <strong>2017</strong>


cluding technical oxygen) (Figure 7).<br />

Prolonging the heating time of the porous<br />

burner leads only to an insignificant<br />

increase in temperature. At the<br />

same time, the efficiency (ETA v) decreases<br />

dramatically. In the experiments,<br />

the oxyfuel burner achieved<br />

the actual temperature level of the ladle<br />

in the casting process already after<br />

90 min (649 °C). Corresponding<br />

comparisons are provided in figures 2<br />

and 5. The energy input to make up<br />

the difference in temperatures in the<br />

refractory lining measured in M3 in<br />

case of porous burner use (538 °C) and<br />

in case of oxyfuel burner use (649 °C)<br />

has to be compensated by thermal energy<br />

transferred from the molten metal<br />

(higher tapping temperature) into the<br />

refractory lining. However, it would<br />

be more useful to employ burners to<br />

achieve this exchange of energy rather<br />

than to accept the negative metallurgical<br />

effects of an excessively high<br />

tapping temperature.<br />

Temperature in °C<br />

600<br />

500<br />

400<br />

300<br />

200<br />

100<br />

0<br />

73 min<br />

<br />

<br />

<br />

0 50 100 150 200 250 300<br />

Figure 7: Heating curves of a porous burner versus a natural gas/oxygen burner<br />

<br />

<br />

M3 porous burner<br />

<br />

Time in min<br />

267 min<br />

<br />

gies<br />

on the temperature<br />

<br />

With the melt being tapped from the<br />

induction furnace at almost identical<br />

temperatures in both cases<br />

(1,530/1,531 °C), 3 min after ladle filling<br />

the temperature difference between<br />

porous burner use and oxyfuel burner<br />

use amounts to 29 K (1498/1469 °C), af-<br />

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MELTING SHOP<br />

ter another 5 min the difference has increased<br />

to 63 K (Figure 8). In the experiment,<br />

temperature losses of 125 °C were<br />

measured in the ladle heated with the<br />

porous burner. In the ladle heated with<br />

the oxyfuel burner, temperature losses<br />

of only 61 K were found – a difference<br />

of 64 K between the two burner types.<br />

From this a potential for lowering the<br />

tapping temperature in the induction<br />

furnace can be derived. The advantage:<br />

Cost savings on electrical energy and<br />

proven metallurgical benefits.The process<br />

advantage of a natural gas/oxygen<br />

burner is shown in figure 7. The physical<br />

aspects will be discussed below in<br />

the paragraphs dealing with convection<br />

and radiation. The reference temperatures<br />

in figure 2, which were measured<br />

as part of the experiment, were reached<br />

with natural gas/oxygen heating, thus<br />

fulfilling the requirement for the comparison:<br />

measuring point M1, near the<br />

inside surface, approx. 820 °C and measuring<br />

point M3, in the middle of the<br />

refractory lining, approx. 640 - 660 °C.<br />

Ladle heating by means of the oxyfuel<br />

burner differs only marginally from a ladle<br />

in the production process heated by<br />

molten metal. Particularly Figures 9 and<br />

3 show that the inside surface zone retains<br />

a similar temperature level.<br />

Temperature difference between<br />

the inside surface of<br />

the refractory lining and the<br />

subsurface measuring point<br />

M1 (25 mm)<br />

An important aspect to be considered is<br />

the energy content of the temperature<br />

difference. As shown in figure 9, after<br />

4.5 h the porous burner achieved a temperature<br />

of 990 °C at the surface of the<br />

refractory lining. Compared to the temperature<br />

achieved by the oxyfuel burner,<br />

there is a different of more than 560 K.<br />

The energy content in the surface zone of<br />

the refractory lining is the same as that of<br />

a ladle at operating temperature.<br />

Accordingly, whenever the ladle is<br />

heated by a porous burner, the refractory<br />

lining needs additional energy input<br />

of 185 K to make up for the difference<br />

(M1, 647/832 °C) (figures 5 and 6). This<br />

additional energy has to come from the<br />

melting process. Consequently, higher<br />

melt temperatures would be necessary.<br />

Temperature in °C<br />

1520<br />

1500<br />

1480<br />

1460<br />

1440<br />

1420<br />

1400<br />

Refractory temperature in °C<br />

1350<br />

1150<br />

950<br />

750<br />

500<br />

350<br />

150<br />

1530 1531<br />

Melting temperature<br />

in induction furnace<br />

Figure 8: Iron temperatures for different heating methods. Temperature level of porous<br />

burner versus O 2<br />

burner<br />

0 2 4 6 8 10 12<br />

Temperature at different refactory lining depths in cm<br />

Figure 9: Comparison of the achieved temperatures at the measuring points in the inside<br />

lining surface zone, in the middle of the lining and in the lining close to the ladle wall.<br />

Comparison of heating by molten metal, natural gas/oxygen burner and porous burner<br />

Physical aspects and comparison<br />

of natural gas/air combustion<br />

and natural gas/oxygen<br />

combustion<br />

Flame temperature<br />

The flame temperature basically depends<br />

on the natural gas/air or natural<br />

gas/oxygen ratio and the burner design.<br />

The comparison is based on the<br />

use of natural gas (methane, figure 9).<br />

In practice, natural gas/air combustion<br />

only achieves flame temperatures of<br />

1498<br />

Temperature in ladle, 3 min<br />

<br />

<br />

1469 1469<br />

Temperature<br />

molten iron<br />

1406<br />

<br />

<br />

<br />

burner<br />

<br />

Porous burner<br />

Porous burner<br />

Temperature, 8 min after<br />

pouring of the melt<br />

< 1,700 to 1,800 °C, O 2<br />

burners temperatures<br />

< 2,850 °C.<br />

Combustion with air versus combustion<br />

with technical oxygen (approximate<br />

calculation)<br />

» Original fuel rate:10 m³/h of natural<br />

gas (CH4).<br />

» Combustion at 100 m³/h of air.<br />

» Combustion requires approx.<br />

20 m³/h of oxygen and approx. 80 m³<br />

of nitrogen (air: 20,9 % O 2<br />

, 78 % N 2<br />

).<br />

16 Casting Plant & Technology 2 / <strong>2017</strong>


Spectral radiation<br />

Spectral radiation density<br />

Wave length<br />

Figure 10: Planck’s radiation law<br />

Fuel<br />

<br />

temperatures<br />

<br />

<br />

Propane/Butane <br />

Hydrogen <br />

Methane (natural gas) <br />

<br />

Table 1: <br />

Temperature Control.<br />

Smart. Reliable.<br />

» Combustion products: H 2<br />

O and CO 2<br />

.<br />

» Lost energy (N 2<br />

): If a temperature of<br />

approx. 1,100 °C is measured in the<br />

waste gas flow of the ladle, 33 % of the<br />

required energy provided by natural<br />

gas is needed to heat up the nitrogen.<br />

Combustion with O 2<br />

In case of combustion with technical<br />

oxygen no burden in the form of nitrogen<br />

needs to be heated. Consequently,<br />

only 6.6 m 3 /h of natural gas are needed.<br />

The higher flame temperature in<br />

case of combustion with pure oxygen<br />

(2,860 °C according to ) provides<br />

a further energetic benefit, namely the<br />

radiation effect (Figure 10). Versus combustion<br />

with air, this effect reduces the<br />

necessary energy input by another approx.<br />

15 % . Compared to combustion<br />

with air, the use of oxygen reduces the<br />

consumption of natural gas to approx.<br />

5.1 m 3 /h for virtually the same combustion<br />

result. This equals a reduction by<br />

approx. 50 %. Natural gas/oxygen combustion<br />

achieves adiabatic temperatures<br />

of more than 2,860 °C. All state-of-theart<br />

burner equipment provides the possibility<br />

of accurately adjusting the mixing<br />

ratio (stoichiometry). Therefore, the<br />

differences in efficiency depend exclusively<br />

on the burner design.<br />

Heat transfer by radiation<br />

Figure 11 illustrates the heat transfer<br />

by radiation.<br />

» Radiation in case of porous burner<br />

use: Gas temperature 1,300 K,<br />

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Casting Plant & Technology 2 / <strong>2017</strong> 17<br />

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MELTING SHOP<br />

wave length 2 μm, spectral radiance<br />

105 W/ (m² μm).<br />

» Radiation in case of natural gas/oxygen<br />

combustion: Gas temperature<br />

3,100 K, wave length 0.77 μm, spectral<br />

radiance 106 W/ (m² μm). As a result<br />

of the higher temperatures, the<br />

wave lengths are shorter. This produces<br />

tenfold higher heat transfer rates.<br />

Heat transfer by convection<br />

No physical strategy for ladle heating<br />

can be derived from the calculation<br />

of the heat transfer from a gas mixture<br />

of 1,000 °C into a refractory wall<br />

of 1,300 °C. Actually, the wall surface<br />

transfers heat into the combustion gas.<br />

The consequence is that heat is extracted<br />

from the refractory wall (surface),<br />

leading to a drop in the wall temperature<br />

(figure 11), but not to the heating<br />

of the ladle.<br />

Fluid temperature<br />

Surface<br />

temperature<br />

Fluid 1<br />

Thermal interface<br />

Solid wall<br />

Figure 11: Principle of heat transfer by convection<br />

Thermal interface<br />

Fluid 2<br />

Surface<br />

temperature<br />

Fluid temperature<br />

Negative convection<br />

Particularly during this phase the surface<br />

temperature has to be kept at a<br />

high level in order for the ladle to retain<br />

its operating temperatures for the<br />

next melt without suffering any major<br />

temperature changes.<br />

Comparison: Holding at temperature<br />

– Heating up and<br />

holding an in-process ladle at<br />

operating temperature<br />

Porous burner<br />

The burner design as well as the used<br />

materials and their thermal properties<br />

put constraints on the temperature control<br />

between the inside surface of the ladle<br />

and the burner sleeve of the porous<br />

burner system. Consequently, the temperature<br />

depends directly on the materials<br />

used in the porous burner design.<br />

A thermocouple installed in the burner<br />

limits the heating process to a maximum<br />

temperature of approx. 1,000 °C.<br />

It can be assumed that the gas temperature<br />

between the surface of the burner<br />

sleeve and the surface of the refractory<br />

lining in the ladle is not significantly<br />

higher. The natural cooling curve in<br />

Figure 12 represents cooling with the ladle<br />

covered and without any additional<br />

energy input. Immediately covering the<br />

ladle is therefore more efficient than using<br />

a porous burner.<br />

Temperature in °C<br />

800<br />

700<br />

600<br />

500<br />

400<br />

M3 porous burner<br />

<br />

<br />

300<br />

10:04:48 10:19:12 10:33:36 10:48:00 11:<strong>02</strong>:24 11:16:48 11:31:12 11:45:36 12:00:00<br />

Figure 12: Comparison of the natural cooling behaviour of a ladle at operating temperature<br />

in the covered state versus use of porous burner heating for 1 h with 12.5 m <br />

<br />

Burner use<br />

Despite the energy input by the porous<br />

burner, the ladle temperature fell<br />

markedly.<br />

<br />

<br />

the ladle is covered<br />

<br />

burner use<br />

natural gas<br />

Time in min<br />

<br />

<br />

Comparison: Holding at temperature<br />

(M1 (2.5 cm))<br />

The ladle was transferred to the respective<br />

burner stand right after the<br />

melt had been poured. The intention<br />

was to demonstrate that it would be<br />

possible to hold the ladle at a maximum<br />

temperature level. Figure 13<br />

shows that the above explained physical<br />

effects lead to the situation that in<br />

case of porous burner use the surface<br />

(M1) cools down, negating the heating<br />

effect of the hot refractory surface<br />

zone. From this it can be concluded<br />

that the porous burner should only be<br />

used after temperatures < 500 °C have<br />

been reached (M3). This would mean<br />

a waiting time of more than 3 h, without<br />

any actual effect on the intended<br />

18 Casting Plant & Technology 2 / <strong>2017</strong>


Temperature in °C<br />

Figure 13: Comparison of the temperature holding performance of a natural gas/oxygen<br />

burner using 4 m of O 2<br />

versus a porous burner using<br />

of natural gas and air directly after pouring; at M1<br />

Savings euros/year<br />

920<br />

840<br />

760<br />

680<br />

600<br />

0 10<br />

20 30 40 50<br />

30 000<br />

25 000<br />

20 000<br />

15 000<br />

10 000<br />

5000<br />

<br />

repairs<br />

<br />

Porous burner<br />

Time in min<br />

<br />

service life<br />

Savings potential<br />

<br />

Savings on electricity<br />

Figure 14: Savings potential provided by a natural gas/oxygen burner based on approx.<br />

25,000 t of molten metal per year<br />

the use of conventional porous burners.<br />

The shortfall in energy incurred<br />

when using porous burners would<br />

either have to be compensated by a<br />

higher tapping temperature or higher<br />

temperature losses would have to be<br />

tolerated when pouring the first melt<br />

(difference of up to 60 K in case of the<br />

investigated ladle). In the overall comparison,<br />

the cost-benefit ratio is clearly<br />

in favour of the natural/gas oxygen<br />

burner.<br />

The advantages:<br />

» high flexibility, operating temperature<br />

after 60 to 90 min<br />

» short non-productive times<br />

» longer service times<br />

» improved resistance to temperature<br />

changes<br />

» cleaner ladles<br />

» lower tapping temperature of induction<br />

furnace<br />

» less lining repair<br />

Cost advantage of the natural<br />

gas/oxygen burner<br />

Especially the use of natural gas/oxygen<br />

burners for heating the ladle to operating<br />

temperature provides obvious<br />

cost saving potential, optimizing the<br />

overall “thermal costs” of the process<br />

( ). The reduction in necessary<br />

energy costs associated with the melting<br />

process is clearly assessable. Moreover,<br />

the problem of thermal fatigue is<br />

alleviated, guaranteeing extended service<br />

lives in conjunction with the effect<br />

of cleaner ladles. The statement<br />

that the ladles are “cleaner” is backed<br />

by the fact that material caking from<br />

the pouring process melts off at high<br />

temperatures and deposits at the ladle<br />

bottom.<br />

heating of the ladle to operating temperature.<br />

Natural gas/oxygen burner<br />

Immediate use of a natural gas/oxygen<br />

burner requires extra energy and may<br />

lead to ladle overheating. Therefore, it<br />

is indispensible to control the burner<br />

operation by means of thermocouples.<br />

Operating times can be programmed<br />

according to the size of the ladle. The<br />

effect of ladle covering on the operating<br />

temperature and the cooling behaviour<br />

is shown in figure 4. After approx.<br />

60 min, a temperature of 605 °C<br />

(at M 3) is reached, which is almost the<br />

same as in the beginning.<br />

Comparison<br />

By means of natural gas/oxygen burners<br />

it was possible to achieve operating<br />

temperature states very similar to<br />

those in an in-process ladle, at energy<br />

costs not exceeding those involved in<br />

Bottom line<br />

In an iron foundry, the applicability<br />

of porous burners is limited. However,<br />

their use is justified in case of low<br />

pouring temperatures, great wall thicknesses<br />

and for ladle drying. Compared<br />

to this, the use of natural gas/oxygen<br />

burners for ladle heating achieves a<br />

physically optimal operating result at<br />

lower energy costs.<br />

www.linde-gas.de<br />

www.gienanth.com


CASTING TECHNOLOGY<br />

Pouring line during the pouring process of pouring units 1 and 2 (Photos & Graphics: M.Busch)<br />

Steffen Geisweid and Dennis Wolzenburg, Heinrich Wagner Sinto, Bad Laasphe<br />

Commissioning of Foundry 3plus<br />

at M. Busch in Wehrstapel<br />

The company M. Busch GmbH & Co. KG located in Bestwig, Germany, has made one of the<br />

largest investments in their company history: At its site in Wehrstapel the nearly 200 years old<br />

company positions itselves soundly for the future with the new Seiatsu molding plant using the<br />

modern compaction process Seiatsu.plus<br />

20 Casting Plant & Technology 2 / <strong>2017</strong>


Figure 1: View of the two steps of the molding plant<br />

Figure 2: Left: cope molding machine; right: drag molding machine<br />

After 24 years of operation of the existing<br />

Seiatsu molding plant of Foundry<br />

3, the new molding plant type<br />

EFA-SD Seiatsu.plus including an additional<br />

pouring unit type P-30-M<br />

has now been started up successfully.<br />

Both machineries were delivered<br />

and installed by the local “world market<br />

leader” Heinrich Wagner Sinto<br />

Maschinenfabrik GmbH (HWS) who<br />

are domiciled in Bad Laasphe in South<br />

Westphalia, Germany.<br />

The task presented to the suppliers<br />

was a modernization and increase of<br />

output of the foundry at the same time.<br />

For the scope of the molding plant, the<br />

existing pattern plates should be useable<br />

in the new molding plant without<br />

any adaption, the length and the<br />

width of the molding boxes remained<br />

unchanged.<br />

During the preliminary planning,<br />

the logistics and material flows of the<br />

old foundry were reassessed by Busch.<br />

On this basis, the areas for molding,<br />

core setting, pouring and shake-out<br />

were defined. The use of available<br />

building surfaces permitted installation<br />

in 2 steps so that production was<br />

not hindered during the first phase<br />

of installation. The green sections in<br />

the drawing (Figure 1) identify step 1,<br />

the red sections show the subsequent<br />

step 2. The flow of the molding boxes<br />

is represented in yellow/orange.<br />

Due to the required output of molds,<br />

it was no longer possible to work with<br />

one single molding machine only. As<br />

the existing building structures had to<br />

be maintained, it was not feasible to<br />

use a so-called twin-type molding machine.<br />

So HWS developed a concept<br />

with two single molding machines<br />

that mold the drag and the cope each.<br />

Both molding machines are operating<br />

with the proven Seiatsu molding<br />

process using a multi-ram press for<br />

the hydraulic secondary compaction.<br />

For another increase of precision and<br />

dimensional accuracy of the molds,<br />

the molding machine for the copes is<br />

equipped with the pattern-side compaction<br />

process Seiatsu.plus of the latest<br />

generation. In this respect, it must<br />

be noted that the compaction from<br />

pattern side has been realized successfully<br />

in more than 20 molding plants<br />

since 2004. By using this process, up<br />

to 30 % higher values of edge compaction<br />

can be achieved (depending on<br />

the complexity of the component geometry)<br />

(Figures 2 and 3).<br />

The direction of travel is opposite to<br />

the previous plant because of the redevelopment<br />

of the material flows, the<br />

core setting line could be placed into the<br />

same area as before. Thus, the optimal<br />

Casting Plant & Technology 2 / <strong>2017</strong> 21


CASTING TECHNOLOGY<br />

Figure 3: Drag with molded cods for brake drums<br />

Figure 4: View onto the drag/core setting line; left above is the cope line<br />

connection to the core-making shop remains<br />

as it is (Figure 4).<br />

The pouring line was relocated to the<br />

opposite side of the foundry which results<br />

in a considerably shorter transportation<br />

distance for the supply of liquid<br />

iron. As a result of the required mold<br />

output, there are two fully automatic<br />

HWS pouring units type “P-30-M” (M<br />

= accompanying changing unit of ladles)<br />

at the pouring line. One of them<br />

had been installed shortly before at the<br />

previous pouring line, the second new<br />

pouring unit is identical in design. The<br />

key function of the pouring units is the<br />

software-monitored fill quantity of the<br />

ladle and data communication. Thus,<br />

the pouring units can “decide autonomously”<br />

which unit pours which mold<br />

so that the logistics of the supply of liquid<br />

metal proceed in an optimal way.<br />

For cooling the poured molds, Busch<br />

still relies on the proven concept of the<br />

mold cod cooling. After a defined cooling<br />

phase inside the molding box, two<br />

mold cods each are transferred into a<br />

mold jacket. The 4-floor cooling structure<br />

that had already been installed at<br />

the former molding plant, was extended<br />

by using additional steel structure in<br />

order to reach the required total cooling<br />

time. The lifting and lowering devices<br />

at the front faces have completely<br />

been redesigned according to the current<br />

state of the art. Shake-out of the<br />

jackets is done by means of a cod lifter<br />

that lowers the cod into the cellar and<br />

pushes it off onto a new casting cooler.<br />

Monitored and controlled is the<br />

molding plant by the latest version<br />

of the production monitoring system<br />

ALS 2010 Advanced that has been developed<br />

by HWS themselves. This system<br />

provides the administration of<br />

process and pattern parameters, the visualization<br />

of cooling times and plant<br />

states as well as the data communication<br />

with the peripherals.<br />

The GLS 2010 (monitoring system for<br />

pouring units, Figure 5) has been developed<br />

particularly for the administration<br />

and processing of data of pouring<br />

machines. It assists the plant personnel<br />

by displaying all important process data<br />

such as pouring weight, pouring time<br />

and pouring temperature as well as by<br />

the representation of molding box information<br />

of the molds that are located<br />

in the pouring area.<br />

Further important functions like a<br />

comfortable administration of pouring<br />

parameters, an evaluation of malfunction<br />

periods and cycle times and a detailed<br />

logging of quantities are also part<br />

of the standard package of this management<br />

system. The GLS uses, of course,<br />

the same operating interface as the ALS.<br />

For fully automatic pouring, a repeat<br />

accuracy of 100 % of the pouring<br />

parameters must be ensured at the<br />

pouring machine in case of a pattern<br />

change. By means of an optional data<br />

communication to the control system<br />

of the molding plant, the transmitted<br />

pattern number enables the automatic<br />

loading of a pattern-specific pouring<br />

program. Using these regulation<br />

and control parameters, the fully automatic<br />

pouring is started.<br />

The whole pouring process can be<br />

observed by an installed camera. For a<br />

22 Casting Plant & Technology 2 / <strong>2017</strong>


Figure 5: Monitor view of the HWS pouring unit monitoring system GLS 2010<br />

Figure 6: Monitor view Vision Control System (VCS)<br />

later analysis of the process, the pouring<br />

cycles are available in an archive.<br />

Integration to other systems is ensured<br />

by defined interfaces, such as MRP interface,<br />

export database or Excel or XML interface.<br />

A tool for permanent quality assurance<br />

is the Vision Control System<br />

(VCS) that has also been developed by<br />

HWS (Figure 6). This system serves for<br />

the camera-based automatic check of<br />

green sand molds for molding defects.<br />

It is suitable to check the produced<br />

molds and thus for quality assurance<br />

at the same time. The examination is<br />

based on a comparison of the molds<br />

with reference data and reference parameters<br />

that are defined and filed in<br />

a pattern-specific way. In connection<br />

with other data collecting and data<br />

evaluation systems, Foundry 4.0 arrives<br />

latest by now.<br />

The first step had been installed in<br />

spring 2016 and comprized the two<br />

single molding machines, the punchout<br />

unit, the central hydraulic station<br />

and other peripherals. In order to be<br />

prepared best for the critical second<br />

step, a preliminary commissioning of<br />

the first step had been realized, i.e. the<br />

central hydraulic station as well as all<br />

drives themselves have been tested in<br />

operating mode, even the molding cycle<br />

of the molding machines had been<br />

performed.<br />

During the company holidays in<br />

summer 2016, the second step was installed.<br />

Commissioning and acceptance<br />

of the molding plant were carried<br />

out on schedule and with success.<br />

Both the existing (and relocated) and<br />

the new second pouring unit have<br />

started their work and are pouring now<br />

the liquid metal fully automatically.<br />

The new Foundry 3plus at Busch is<br />

producing now with one of the most<br />

modern molding plants that have<br />

ever been delivered by HWS. Equipped<br />

with the latest software solutions and<br />

the compaction process Seiatsu.plus,<br />

Busch are now well prepared for the<br />

requirements of the future.<br />

www.wagner-sinto.de<br />

www.m-busch.de<br />

Casting Plant & Technology 2 / <strong>2017</strong> 23


SIMULATION<br />

Thomas Tosse, Munich<br />

Quicker solution concepts<br />

with ANSYS SpaceClaim<br />

Eisenwerk Erla GmbH in Schwarzenberg, Germany, is one of the longest established companies<br />

and most important employers in the entire Ore Mountains. The specialist for castings of turbocharger<br />

and exhaust manifold components employs 400 specialized employees and achieved<br />

sales of 110 million euros in 2012/13. The Development Department of the automotive supplier<br />

uses all leading CAD systems - but only one during the offer phase: ANSYS SpaceClaim<br />

Collaboration during product<br />

development<br />

Development activities should lead to<br />

maximum customer satisfaction. For<br />

this purpose, employees exploit the latest<br />

versions of all common automotive<br />

3-D CAD systems, e.g. CATIA, Pro/Engineer<br />

and Solid Edge. In addition, simulation<br />

software is used for solidification<br />

and mold-filling processes in order to<br />

turn customer definitions into a foundry-implementable<br />

product as quickly<br />

as possible, as well as find savings potentials<br />

and optimization approaches.<br />

<br />

iron hammer on the River Erl (Photos: ANSYS Germany GmbH)<br />

After an eventful 600-year history, Eisenwerk<br />

Erla is now one of Germany’s most<br />

modern and efficient jobbing foundries.<br />

In its lavishly renovated works, highly<br />

specialized personnel develop, manufacture<br />

and process demanding products in<br />

all modern casting materials in compliance<br />

with all environmental standards.<br />

The range extends from mass-produced<br />

automotive castings with complicated<br />

and core-intensive designs in high-alloyed<br />

materials to components for machine<br />

construction (Figure 1). The works<br />

has a total annual capacity of more than<br />

23,000 tonnes for producing castings<br />

weighing from 0.1 kg to 40 kg for more<br />

than 200 customers worldwide. Eisenwerk<br />

Erla advises its customers on the use<br />

of numerous materials, from spheroidal<br />

or lamellar graphite cast iron, through<br />

SiMo and Ni-Resist, to stainless steel. The<br />

company’s competences also include the<br />

development of materials for special cases.<br />

It maintains close relationships with<br />

universities, and exploits modern test<br />

bench technology in the works.<br />

Making viable offers quickly<br />

This begins with the comprehensive examination<br />

of incoming customer enquiries,<br />

as well as analysis of the specifications<br />

on the basis of the drawings and<br />

appropriate data sets provided, in order<br />

to create an optimum production feasibility<br />

assessment as quickly as possible.<br />

Eisenwerk Erla receives new enquiries<br />

every day. An item can take between<br />

half-an-hour and two weeks to process,<br />

depending on its complexity. During<br />

this phase, the company has been using<br />

two licenses a day from 3-D direct modeler<br />

ANSYS SpaceClaim since 2012. The<br />

design team got to know SpaceClaim<br />

at Euromold 2011 and then evaluated<br />

a test version. They were immediately<br />

impressed by the rapid potentials for<br />

directly manipulating geometries. No<br />

information is available on the history<br />

and parametric design of the original<br />

systems because interested parties only<br />

provide neutral STEP files of the desired<br />

parts with their enquiries ( ).<br />

Nevertheless, the component must be<br />

comprehensively analyzed and requires<br />

numerous modifications before an economically<br />

and technically optimum offer<br />

can be made.<br />

24 Casting Plant & Technology 2 / <strong>2017</strong>


models using ANSYS SpaceClaim opens<br />

<br />

<br />

Direct manipulation of geometries<br />

on STEP models<br />

Without considering the development<br />

history of the component, the direct<br />

modeler permits rapid changes to the<br />

filleting of the components, addition of<br />

demolding inclines, or enlargement of<br />

individual model areas. For cost reasons,<br />

the castings should require as few cores<br />

as possible for production – so the inner<br />

contours and undercuts must also be reworked.<br />

Particular geometries can easily<br />

be pulled out with ANSYS SpaceClaim<br />

and then further processed for core production.<br />

There are simple commands<br />

and rapid methods for arranging several<br />

parts in clusters. Missing connectors can<br />

also be rapidly reconstructed. “We can<br />

carry out all manipulations of the STEP<br />

files, from necessary foundry-related fillets<br />

to removal of interfering contours,<br />

quicker and easier with SpaceClaim than<br />

with other CAD systems,” says one of the<br />

responsible designers. Using SpaceClaim<br />

ANSYS SpaceClaim<br />

during this phase shortens Eisenwerk Erla’s<br />

processing time by about 10 %.<br />

Holistic production concept<br />

For casting simulation, SpaceClaim provides<br />

data in STL format so that it can be<br />

analyzed according to the finite element<br />

method in WinCast Experto (from RWP<br />

GmbH in Roetgen). The data for each<br />

optimization loop must be saved so that<br />

one can understand modifications and,<br />

if necessary, change them back again.<br />

“It is helpful here if the models can be<br />

changed with backward steps or parameters,”<br />

say the designers. The final work<br />

step is checking the separation of components<br />

from the cluster. It is often necessary<br />

to construct special equipment so<br />

that the individual parts can be safety<br />

and accurately separated again after casting<br />

– another cost factor in the technical<br />

solution. Here, too, SpaceClaim scores<br />

with rapid geometry creation for all aspects<br />

of existing components.<br />

If one has ever seen a rocket take off, flown in an airplane or driven a car,<br />

worked with a computer or mobile device, crossed a bridge, or put on wearable<br />

technology, the chances are good that one has used a product for<br />

which software from ANSYS played a critical role in its creation. ANSYS is<br />

one of the world’s leading suppliers of technical simulation solutions. The<br />

company helps the most innovative companies in the world to implement<br />

radically better products for their customers. Insofar that ANSYS offers the<br />

best and widest range of technical simulation software, the company helps<br />

customers solve the most complex of design challenges and design products<br />

that go to the limits of human imagination.<br />

Finally, enquiries are answered with<br />

a holistic solution concept in which all<br />

technical and economic issues are clarified<br />

and assured. Numerous models<br />

and drawings from ANSYS SpaceClaim<br />

contribute to this – the original modelling<br />

is not supplied in the offer phase.<br />

Creation of drawings too in<br />

future<br />

In a close network with pattern and<br />

tool construction partners, the Development<br />

Department determines right<br />

from the start the best symbiosis between<br />

the required design, accuracies<br />

and practical implementation in production.<br />

For this purpose, even more<br />

meaningful drawings should in future<br />

be created: Eisenwerk Erla wants to particularly<br />

emphasize in the drawings certain<br />

controlling dimensions that may<br />

not be changed. For this purpose, there<br />

will soon be another training course at<br />

LINO GmbH in Hagen, the authorized<br />

sales partner of ANSYS SpaceClaim. Except<br />

for the basic training in 2012, and<br />

a course on “Expanded modelling techniques”,<br />

its services have hardly been<br />

exploited: “ANSYS SpaceClaim really is<br />

a very good program,” says the Design<br />

Manager. “When direct modelling is<br />

involved, we cannot think of any comparable<br />

system with which very complex<br />

external models can be so quickly<br />

and easily processed with several measurements<br />

and mold inclines.”<br />

www.spaceclaim.com/de<br />

Casting Plant & Technology 2 / <strong>2017</strong> 25


SIMULATION<br />

Lu Baosheng, Changchun, China<br />

Manufacturability of a cylinder<br />

block sand core<br />

Quality sand cores are a natural requirement for most high integrity castings. Just as for the castings,<br />

the challenges are related to technical, environmental and cost aspects. One key factor for a<br />

robust core production is manufacturability: the reliability of production considering the given facility<br />

conditions. For FAW Foundry, core process simulation using MAGMA C+M is an important<br />

tool to establish a robust state-of-the art production of lightweight automotive cylinder blocks<br />

Sand core production is as complex<br />

and demanding as the manufacture of<br />

metal castings. A robust and high quality<br />

production means efficient development,<br />

reduced energy consumption<br />

and waste, and foremost a guaranteed<br />

consistent quality. A typical example<br />

for these diverse targets is a core for an<br />

automotive cylinder block being produced<br />

for a renowned and internationally<br />

active automobile company.<br />

Through the consequent and early use of MAGMA C+M The FAW engineers have<br />

saved a considerable amount of resources (Graphics: MAGMA)<br />

Simulation at the initial<br />

design of cores<br />

When engineering a new product, the<br />

FAW team, Changchun, China, uses<br />

simulation to develop and verify their<br />

shooting and curing process as early as<br />

possible to ensure an effective development<br />

process. The complex interaction<br />

of sand and gas flow during core box filling<br />

and binder curing can be visualized<br />

and assessed at early stages of the design<br />

and without the need for real core boxes<br />

and experiments. FAW operates several<br />

types of core shooting machines,<br />

with different types of shoot heads, core<br />

boxes and cores. To effectively plan the<br />

work flow in their facility, knowledge<br />

regarding the machine configuration<br />

and shooting and gassing parameters<br />

suited to produce each core is essential.<br />

The key point was: Could FAW<br />

manu facture the cylinder block core<br />

on different machines, possibly with<br />

different core boxes and core designs?<br />

When challenged with this question,<br />

the FAW engineers had already<br />

successfully developed Design<br />

A, combining their experience with<br />

26 Casting Plant & Technology 2 / <strong>2017</strong>


Figure 1: Sand core of design A - result of the core shooting simulation with MAGMA C+M (left), produced cores (right)<br />

Figure 2: Simulative determination of design changes with MAGMA C + M at machine change: (left) 3-D-CAD model, design A,<br />

(right) 3-D MAGMA model, design B<br />

virtual experimentation in MAGMA<br />

C+M by MAGMA Gießereitechnologie<br />

GmbH, Aachen, Germany. The design<br />

featured a horizontally split core<br />

box, including optimized placement<br />

and size of shoot nozzles and vents.<br />

The results of the real core production<br />

and the predictions of the simulation<br />

matched well (Figure 1), and cores<br />

were being produced successfully.<br />

Testing of core production on<br />

other machine types<br />

However, when the core shooting machines<br />

used were considered for production<br />

of another core, the suitability<br />

of a different machine type needed<br />

to be evaluated quickly and reliably. To<br />

get the job done, the FAW engineers<br />

again relied on MAGMA C+M.<br />

While the new and old designs shared<br />

the same general concept, the possibilities<br />

to place shoot nozzles and vents<br />

were different (Figure 2). This mainly<br />

concerned two nozzles on the core’s<br />

side arms, which could no longer be<br />

used. Regardless, the cores had to be<br />

produced according to the same quality<br />

specifications. Early prototyping<br />

shop floor tests were impossible, as production<br />

was being carried out “just in<br />

time”.<br />

To get a reliable answer, the engineers<br />

created a new design, ran the<br />

MAGMA C+M simulation and checked<br />

the results. Within just a few hours,<br />

their virtual experiment produced the<br />

results needed to get them answers to<br />

their questions.<br />

Simulative assessment of the<br />

<br />

First, the core box filling was evaluated<br />

using the MAGMA C+M results<br />

‘Sand Density’ and ‘Sand Trace’. The<br />

Casting Plant & Technology 2 / <strong>2017</strong> 27


SIMULATION<br />

former is a criterion for the local density<br />

of the sand and the latter shows<br />

the shoot nozzle from which the sand<br />

originates. Considering these results,<br />

problematic areas where different sand<br />

fronts meet can easily be identified. Secondly,<br />

the binder curing was assessed.<br />

MAGMA C+M determines the amount<br />

of adsorbed amine in the core, indicating<br />

core sections not cured sufficiently.<br />

This result can also be used to identify<br />

the smallest possible amount of amine<br />

needed to produce sound cores, cutting<br />

down consumable costs and avoiding<br />

production waste.<br />

Simulative analysis of the<br />

curing process<br />

As it turned out, the design modifications<br />

resulted in critical problems. For<br />

the filling, the results showed incompletely<br />

filled core sections in the middle<br />

and the lower parts of the arms.<br />

Severe problems were also identified<br />

Figure 3: <br />

Figure 4:sign<br />

B (left), not completely hardened area in the lower core half, design B (right)<br />

28 Casting Plant & Technology 2 / <strong>2017</strong>


FAW Foundry Co., Ltd.<br />

...is a wholly-owned subsidiary<br />

of the FAW Group, is a stateowned<br />

enterprise, and is the<br />

largest production base for automotive<br />

castings in China. FAW<br />

Foundry was founded in 1953<br />

parallel to the establishment of<br />

the FAW Group. It consists of 7<br />

branch companies, 1 subsidiary<br />

and 2 joint stock companies.<br />

FAW Foundry produces iron,<br />

aluminum, magnesium and other<br />

nonferrous parts covering all<br />

important automotive castings.<br />

With its own R&D Department –<br />

Technical Center, FAW Foundry<br />

has capacity for casting development,<br />

design, scientific research<br />

and CAE application in product<br />

design and manufacturing.<br />

during curing, especially in sections<br />

in the lower core half, which was insufficiently<br />

cured. Further simulations<br />

considering different core shooting<br />

parameters like blowing pressure and<br />

blowing time were quickly carried out,<br />

but these measures could not resolve<br />

the issues.<br />

Based on the simulation results,<br />

the engineers could not recommend<br />

switching the core shooting<br />

machines. When discussing how to<br />

proceed, the simulation results were<br />

essential in communicating the problems<br />

to be expected. In the end, the<br />

engineers’ advice was followed and a<br />

switching of the machines avoided.<br />

Later, a trial series with the modified<br />

design was carried out within a research<br />

project. Once more, these trials<br />

showed a good match between the results<br />

of the software and the cores produced<br />

on the shop floor.<br />

In the end, FAW saved significant resources<br />

with minimal effort by consequently<br />

using MAGMA C+M as early<br />

as possible in engineering its core production<br />

process.<br />

www.magmasoft.com<br />

www.faw-foundry.com.cn


Christenguss AG is already producing complex sand molds in 3-D printing (Photos: Christenguss AG)<br />

Mirela Dizdarevic, ExOne GmbH, Gersthofen<br />

On the way to “Casting 4.0”<br />

Industry 4.0, Foundry 4.0, Guss 4.0 – nowadays developments are occurring so fast that instead<br />

of new concepts, only version designations are being assigned. With its vision of Guss 4.0,<br />

Christenguss AG of Bergdietikon in Switzerland is also blazing the trail into a digital future.<br />

The real and the virtual world are increasingly<br />

growing together. Industry<br />

4.0 – the fusion of modern information<br />

and communications technology with<br />

production – has become an essential<br />

development and is currently a much<br />

discussed topic. There are already a<br />

few companies in the foundry industry<br />

implementing innovative solutions<br />

on the way towards Foundry 4.0. From<br />

the outset, Christenguss AG in Switzerland<br />

has been committed to progress.<br />

The constant pursuit of modernization<br />

and optimization mean that Christenguss<br />

is already presenting itself as a top<br />

modern foundry that manufactures<br />

complex sand casting molds in a 3-D<br />

printing process. It is in this way that<br />

the Bavarian company ExOne from<br />

Gersthofen near Augsburg provides a<br />

valuable service with an S-Max production<br />

printer. This allows the foundry<br />

the production of sand molds of the<br />

highest quality and great individuality,<br />

from batch sizes upwards. The innovative<br />

3-D process also takes sustainability<br />

into account, as ExOne Sales Manager<br />

Holger Barth explains: “Thanks to<br />

maximum process reliability and high<br />

product quality, the rejects are reduced<br />

to a minimum, and only the parts that<br />

are effectively needed are produced.<br />

This saves resources, because the energy<br />

required for the remelting of defective<br />

components is reduced.”<br />

Quality, individuality and<br />

process safety<br />

These points also convince Florian<br />

Christen, CEO of the traditional family<br />

business in its fourth generation and<br />

a man with a strong drive for innovation.<br />

He sees his company as an innovation<br />

and technology leader in the<br />

field and would like to make it the most<br />

advanced in the industry. In his own<br />

words, he even plans to “fundamentally<br />

change the entire foundry industry<br />

with innovative Ideas.” Christen<br />

wants to consciously use the opportunities<br />

offered through digitization<br />

in the foundry – both for itself and for<br />

its customers. His vision is called Guss<br />

4.0 (Guss is a play on words in German,<br />

meaning “cast” or “casting”). If in the<br />

future things go according to his wishes<br />

the production of each individual<br />

casting will be able to be automatically<br />

controlled and regulated. The desire<br />

to increase efficiency and to optimize<br />

product quality forms the background<br />

of his plans. Besides Guss 4.0, which<br />

is the vision of a fully automated cast-<br />

30 Casting Plant & Technology 2 / <strong>2017</strong>


Figure 1: For complex internal contours, the contours of the casting are measured<br />

by means of a CT scan<br />

ing process, Christenguss is putting its<br />

faith in using the latest technology in<br />

the digital detection of raw parts. This<br />

is a costly undertaking, especially due<br />

to the fact that in older models, it is often<br />

the case that no drawings or original<br />

data are available (anymore) to<br />

form the basis of the casting’s digitalization.<br />

To also avoid storage, insurance<br />

and inspection costs and to prevent<br />

tool loss, the tool data can be digitized<br />

and archived as a precaution.<br />

In each of these cases, the solution<br />

is “reverse engineering”, i.e. detailed<br />

reverse engineering. In conjunction<br />

with 3-D printing, this is not only an<br />

efficient method for simulating parts<br />

that are no longer available, it is often<br />

the only way to reconstruct certain<br />

components quickly and at relatively<br />

low cost. Christenguss uses the ExOne<br />

S-Max for 3-D printing.<br />

<br />

<br />

Since the digital capture of castings using<br />

laser scanning are pushed to their<br />

limits especially when it comes to complex<br />

inner contours (Figure 1), in this<br />

case Christenguss also has the option to<br />

detect with a CT scan. In this process,<br />

the raw part is x-rayed three-dimensionally<br />

so that even the most complex inner<br />

contours are mapped. A dataset is then<br />

generated in the STL format from the CT<br />

scan. This dataset or the corresponding<br />

same point-clouds are read in the course<br />

of reverse engineering and the data is<br />

aligned to the coordinate system. After<br />

performing data analysis, non-cast-relevant<br />

parts are removed and the polygons<br />

are optimized. Using SolidWorks design<br />

software, the part is then constructed<br />

digitally and the casting systems and<br />

the mold are drawn ( ). Then,<br />

the mold is printed at Christenguss on<br />

the ExOne S-Max and cast on site. Lastly,<br />

the finished cast blank finally undergoes<br />

a visual inspection. The timeline<br />

for the entire process from the CT scan<br />

to the finished blank only amounts to<br />

about three to four weeks. Thus, the respective<br />

digital three-dimensional data<br />

can be obtained very quickly from any<br />

existing object of any size or shape without<br />

the original data.<br />

<br />

<br />

“Obsolete parts can thus be quickly<br />

reproduced in reverse engineering<br />

by means of the digital process,” confirms<br />

Holger Barth of ExOne. “For example,<br />

if the original manufacturer is<br />

no longer in business or no longer offering<br />

the part.” He also makes the point<br />

that Christenguss has become a real<br />

specialist in the field of tool-less mold<br />

production – particularly by using the<br />

S-Max-printer: “It produces complex<br />

sand cores and molds directly from CAD<br />

data, eliminating the need for physical<br />

models. In this way, Christenguss even<br />

produces complex inner contours with<br />

a printed sand core from the S-Max.”<br />

Changes and optimizations in the CAD<br />

data can be immediately implemented<br />

in the product design and the casting<br />

can therefore start within a short time<br />

and without additional tools. There is<br />

also a great freedom of design when<br />

printing detailed, high-precision cores<br />

and complex geometries.<br />

In conclusion, Florian Christen again<br />

refers to time and cost savings: “Thanks<br />

to the 3-D-printing of the molds, positioning<br />

systems can also be integrated<br />

directly into the sprue for a casting.<br />

As a result, this means specific set-ups<br />

for machining and plastering of parts<br />

are only necessary to a very limited extent.”<br />

This is another benefit for the<br />

foundry and thus also for their customers<br />

– and a wonderful prospect for Florian<br />

Christen’s vision of Guss 4.0.<br />

The casting systems and the casting mold are generated in the software<br />

<br />

www.christenguss.ch<br />

Casting Plant & Technology 2 / <strong>2017</strong> 31


WORK SAFETY<br />

Robert Piterek, German Foundry Association, Düsseldorf<br />

On course for<br />

a new safety culture<br />

Georg Fischer Automotive initiated its Zero-Risk Campaign in 2015 with a series of posters, a<br />

training video and a variety of events. The aim is to considerably increase safety at work at production<br />

sites in Europe, Asia and America. The campaign, which will last for several more years,<br />

<br />

<br />

“Safety at work is not a sexy topic.”<br />

Tina Köhler has no illusions and<br />

adds, “When colleagues talk to an employee<br />

about wearing protective goggles<br />

his request will most probably receive<br />

a grumpy response.” The head<br />

of communications at Georg Fischer<br />

(GF) wants the Zero-Risk Campaign to<br />

change this attitude to safety at work at<br />

all the Group’s works and thus ensure<br />

that all workers are healthy when they<br />

go home in the evening. The Manager<br />

of Marketing & Communication has<br />

set the bar high: safety rules should become<br />

second nature for all Group employees<br />

so that one day they will thank<br />

their colleagues for such instructions.<br />

Tina Köhler (GF Automotive’s Head of Communication), Robert Piterek (BDG-Editor)<br />

and Frank Bettinger (Manager of Environmental Protection and Occupational Safety at<br />

GF Singen) during a tour of the works at the Georg Fischer foundry in Singen (left to<br />

right, Photos: Klaus Bolz).<br />

Accidents happen because<br />

risks are taken<br />

Georg Fischer decided to call it the<br />

Zero-Risk Campaign because Köhler<br />

wants this campaign to fight the causes<br />

of accidents. “Accidents happen because<br />

risks are taken,” she explains. And “Zero-Risk”<br />

should gain worldwide recognition<br />

and thus be standardized at all the<br />

Group’s works. Köhler’s fervent commitment<br />

to greater awareness of risk comes<br />

from an accident at the Georg Fischer<br />

works in the Westgerman city of Mettmann<br />

that focused her attention on<br />

health and safety at work. Since then she<br />

has been using marketing and communication<br />

methods to advocate maximum<br />

safety at her employer’s production sites.<br />

With support from the Head of GF<br />

Automotive, Josef Edbauer, the campaign<br />

got underway at all the company’s<br />

works in Germany, Austria and<br />

32 Casting Plant & Technology 2 / <strong>2017</strong>


The almost-silent electric fork-lift trucks<br />

are equipped with a blue light in order<br />

to prevent accidents caused by collisions<br />

with them.<br />

sponsible for environmental protection<br />

and occupational safety at the<br />

Singen works, early on started aiming<br />

to reduce accident rates to zero.<br />

The Singen works of Georg Fischer<br />

Automotive is a high-tech factory<br />

where manual work on its five production<br />

lines has been reduced to a minimum<br />

over the course of time. As in<br />

many other modern foundries, robots<br />

are components of foundry equipment<br />

that are now taken for granted, as are<br />

ergonomic workplaces, e.g. for core<br />

insertion and the machining of castings.<br />

But this cannot completely rule<br />

out the risk of an accident for the workers,<br />

even if accident rates have fallen<br />

considerably. The Zero-Risk Campaign<br />

was therefore right on cue for Bettinger,<br />

who has been working at the automotive<br />

suppliers for more than 25<br />

years: “Here in Singen we had already<br />

introduced some effective measures<br />

before the campaign started. The introduction<br />

of a safety culture was the<br />

next important step for us.”<br />

Smelter in full gear at an induction furnace in the works. The personal protective equipment<br />

used by GF’s smelters has no back because no danger is posed from this direction.<br />

“We want to protect workers whilst burdening them as little as possible,” says Frank<br />

Bettinger.<br />

China in 2015. This affected more than<br />

5,000 employees, who had achieved<br />

production of 600,000 tonnes of iron<br />

and light metal castings in 2015 with<br />

sales worth 1.23 billion euros. The focus<br />

was initially on the three most frequent<br />

types of accidents – involving<br />

eye injuries, serious cuts, or tripping<br />

up. Whereby the benchmark for the<br />

correct treatment of health and safety<br />

at work was the Georg Fischer Singen<br />

iron foundry near Lake Constance,<br />

which employs about 1,100 personnel<br />

and had already been making great<br />

efforts to reduce the number of accidents<br />

since 2010. Frank Bettinger, re-<br />

The illusion of invulnerability<br />

It is in the nature of accident prevention<br />

measures that they eventually<br />

reach their limits: “We do a lot for our<br />

employees, but cannot wrap them in<br />

cotton wool or keep them in a bubble<br />

– there is no 100 % safe work,” admits<br />

Bettinger. So there is no way around<br />

having a safety culture in order to<br />

minimize residual risks. The aim must<br />

be to place safety at work in the foreground<br />

so that employees are always<br />

aware of potential risks. But one cannot<br />

simply decree a safety culture – because<br />

there are three human behavioral<br />

traits against it: “Firstly, there is<br />

the illusion of invulnerability that we<br />

all know from driving,” explains Tina<br />

Köhler. “Most of us are convinced that<br />

we will not have a car accident – it only<br />

happens to others. Recognizing this<br />

illusion is important in order to increase<br />

awareness for safety at work,”<br />

she stresses. Then there is the risk of<br />

too much or too little routine during<br />

the work. Both are considered frequent<br />

causes of accidents. Finally, there is our<br />

treatment of rules which, for various<br />

reasons (such as time pressures), are<br />

not observed. Breaches of the rules rapidly<br />

become dangerous for one’s own<br />

health and that of others.<br />

The communication experts at<br />

Georg Fischer avoid the use of shocking<br />

pictures in order to make the series<br />

of campaign posters as effective as possible.<br />

The reason: pictures of bloody<br />

helmets or amputated limbs achieve<br />

the opposite to what is intended. Experts<br />

confirm that this merely results<br />

Casting Plant & Technology 2 / <strong>2017</strong> 33


WORK SAFETY<br />

in a suppression of the risks. The posters<br />

therefore have an almost aesthetic<br />

design, a blue eye patch, a pink crack<br />

in a hand, or yellow stairs deviding a<br />

male’s leg, bearing the slogan “Everything<br />

is fine before the accident. Everything<br />

is different afterwards.” The focus<br />

is on the content!<br />

Machining castings at GF Singen. Fettlers need particularly good protection while<br />

working<br />

Campaign prevents every<br />

<br />

The three topics were then worked on<br />

at the various sites last year. First came<br />

the warning against eye injuries, accompanied<br />

by appropriate posters<br />

and events, as well as the so-called<br />

“walk-in eye” that made a stopover<br />

in Singen for three days. This allowed<br />

the personnel to admire a large walkin<br />

eye, undergo an eye test, and have<br />

their intraocular pressure measured.<br />

Whereby the highlight was that they<br />

could also be temporarily deprived<br />

of their eyesight there. Tina Köhler is<br />

certain that, “This gave them a totally<br />

different understanding of the topic.”<br />

GF Singen also invited the employees<br />

and their families to coffee<br />

and cake in the works. “Our ulterior<br />

motive for this was that the presence<br />

of their families at the works provided<br />

stimuli to avoid taking any risks,”<br />

Bettinger remembers. There was also<br />

an event organized by UVEX, which<br />

produces protective goggles. Beyond<br />

2016, further events on the topics of<br />

hand injuries and tripping risks will<br />

then follow. A glance at the accident<br />

figures clearly shows that the campaign<br />

has had an effect – they fell by<br />

more than a quarter (26 %) during the<br />

first six months of 2016, compared to<br />

the same period of the previous year.<br />

There has been a reduction of about<br />

20 % in the number of accidents compared<br />

to the business years of 2015<br />

and 2016.<br />

Shake-out station for cast iron. Cranes for handling the castings provide ergonomic support for the employees during their work<br />

34 Casting Plant & Technology 2 / <strong>2017</strong>


Taking your eye off the ball<br />

No accidents at work<br />

Everything is fine before an accident.Everything changes after one.<br />

For you, your family and your friends. Don’t let it come to that. Protect<br />

yourself! Don’t take any risks. Look out for yourself – and for your<br />

co- workers.<br />

Aesthetic series of posters: potential dangers<br />

at works are referred to tastefully<br />

during the Zero-Risk Campaign<br />

The core-setting line of a molding plant. Protective goggles and hearing protection<br />

are standard safety equipment at almost all workplaces<br />

On-site risk assessment is<br />

essential<br />

Georg Fischer’s safety at work campaign<br />

has had a dramatic effect on accident<br />

figures throughout the Group.<br />

The main work for the wellbeing of the<br />

employees, however, will continue to be<br />

carried out by those responsible on-site,<br />

such as Frank Bettinger. When he talks<br />

about his everyday work it soon becomes<br />

clear that he is leaving no stone<br />

unturned in order to prevent accidents<br />

at the Singen works or rule out any repetition<br />

of them: a three-man team is constantly<br />

underway among the roughly<br />

1,100 employees at the site to provide<br />

information on safety at work and carefully<br />

investigate how any accidents occurred.<br />

There were 63 accidents at work<br />

last year, a fall of almost 60 % compared<br />

to 2010 (during which 148 accidents<br />

occurred) – a major success that<br />

can be traced back to Bettinger’s commitment,<br />

in particular. He and his team<br />

enter departments every day and observe<br />

the processes in order to estimate<br />

the risks. Modifications, that could be<br />

new sources of risk for the employees’<br />

workplaces, are often undertaken on<br />

the extended company grounds in central<br />

Singen. When new workers are engaged,<br />

Bettinger tries as hard as possible<br />

to rule out potential hazards before<br />

they start work – from individual provision<br />

of personal protective equipment<br />

(PPE) to ergonomy at the workplace.<br />

For the experienced engineer, poor ergonomic<br />

working conditions are “Accidents<br />

waiting to happen, that must be<br />

closely monitored, particularly considering<br />

demographic change.”<br />

He faces a mammoth task by the end<br />

of <strong>2017</strong>: training all 1,100 employees<br />

within the framework of the Zero-Risk<br />

Campaign. But instead of throwing his<br />

hands up in horror because of having<br />

to organize 80 - 100 courses in groups<br />

of 10 - 15 personnel, the Manager of<br />

Environmental Protection and Occupational<br />

Safety is looking forward to<br />

being able to give his specialist field<br />

a completely new significance in the<br />

company, and he is already certain<br />

that the campaign will change the<br />

company from within.<br />

A training video has been made for all<br />

the sites – in German, English and Chinese<br />

– in order to drive forward and stabilize<br />

cultural change in the company.<br />

The video portrays the sources of risk<br />

in an exaggerated form and shows what<br />

should not happen. Executives and<br />

managers are all closely integrated in<br />

the process. An accident occurring in,<br />

say, Singen must be investigated by the<br />

manager, documented, and preventive<br />

long-term or short-term measures defined.<br />

“And he or she must immediately<br />

ensure that the accident does not happen<br />

again during the next shift,” stresses<br />

Bettinger. “We thus obtain very good<br />

information, and will continuously improve<br />

safety at work,” he adds.<br />

Zero-Risk Campaign to be<br />

continued<br />

Talks about the second phase of the<br />

Zero-Risk Campaign have already taken<br />

place with Dirk Lindemann, Head<br />

of Iron Casting Europe, and Markus<br />

Rosenthal, Head of Light Metal<br />

Die-Casting Europe. The further course<br />

of the campaign will be decided at a<br />

meeting scheduled for autumn. Then<br />

this information will be passed on to<br />

the Managing Directors of the works.<br />

According to Frank Bettinger, positive<br />

side-effects of the efforts undertaken on<br />

the topic of occupational safety include<br />

the reduced number of sick days among<br />

employees, fewer plant downtimes, and<br />

– as Tina Köhler stressed – the additional<br />

attractiveness of jobs: “Unfortunately,<br />

many people still believe that foundries<br />

are dirty, loud and dangerous. The<br />

entire sector has to move away from this<br />

image – the up-and-coming generation<br />

wants highly technical jobs, so we have<br />

to do something about safety at work!”<br />

www.gfau.com<br />

Casting Plant & Technology 2 / <strong>2017</strong> 35


CLEANING, FETTLING & FINISHING<br />

Ralf Paarmann, Burscheid<br />

The future is big!<br />

The potentials for improvement, however, is to be found in the small details, one could say. Although<br />

northern Germans tend to be on the quiet side, one exception is located on the River Elbe.<br />

Global Castings GmbH, in Stade, is developing at record speed and, although everything is consis-<br />

tion<br />

has taken place there in collaboration with blasting media producer Ervin Amasteel<br />

The stage was set for growth when the<br />

Danish Global Castings Group took<br />

over the foundry of Casting Technology<br />

Stade (CTS) in August 2014.<br />

The production site now extends to<br />

30,000 m² and the number of employees<br />

has risen from 30 to 170. Casting at<br />

Stade mainly consists of components<br />

for offshore wind energy – workpieces<br />

that weigh 20 to 60 tonnes each.<br />

With two 40-tonne melting furnaces,<br />

the company is designed for casting<br />

and processing unit weights of up to<br />

120 tonnes. These northern Germans<br />

therefore rank among the true heavyweights<br />

of casting technology.<br />

Three times a month became<br />

four times a day<br />

As a result of its rapid development –<br />

casting in Stade used to take place only<br />

two or three times a month, but now<br />

occurs three to four times a day – decisions<br />

at Global Castings have to be<br />

made quickly. “We do not take long<br />

practising, we simply act,” explains<br />

Marian Bienek, Production Manager<br />

at Global Castings in Stade. Given<br />

this drive, there was an immediate reaction<br />

when the cleaning results for<br />

the steel-casting giants no longer met<br />

quality demands, necessitating laborious<br />

and time-intensive post-processing<br />

in Denmark before delivery. This<br />

was not compatible with the company’s<br />

straightforward philosophy.<br />

Read more on page 38 >><br />

Among other things, the offshore windenergy<br />

industry relies on high-quality cast<br />

components produced by Global Castings<br />

in Stade (Photo: Shutterstock)


CLEANING, FETTLING & FINISHING<br />

Attention turned to the steel<br />

blasting-media<br />

Global Castings wanted to achieve<br />

the best possible surface quality onsite<br />

and was prepared to make the corresponding<br />

changes to the parameters<br />

involved in cleaning the castings.<br />

Production Manager Oliver Schmidt<br />

( Figure 1) focused on the blasting-media:<br />

“It was only a matter of nudging all<br />

the other factors, adjusting the numbers<br />

behind the decimal point. But<br />

when it came to the blasting-media we<br />

believed that we could make the most<br />

difference here, i.e. achieve shorter<br />

blasting-times, lower costs, longer service<br />

lives and, above all, considerably<br />

better cleaning performance.” The bottom<br />

line was that quality and economic<br />

efficiency had to be right.<br />

Before the takeover by Global Castings,<br />

blasting was carried out in Stade with<br />

a high-carbon round-grain steel blasting-media<br />

from a Slovenian producer.<br />

This used to be sufficient, according<br />

to Schmidt: “The demands made<br />

of the parts we produced were lower<br />

at that time; the surface became verifiably<br />

clean at some point – finished.”<br />

Quality demands rose enormously<br />

with Global Castings and the focus on<br />

construction for offshore wind-energy<br />

plants, because the standards and inspection<br />

requirements for the wind industry<br />

are extremely high, particularly<br />

for components that are installed at<br />

sea and exposed to considerable stresses.<br />

“If something fails there, one cannot<br />

simply nip out to a wind turbine of<br />

these dimensions and repair it quickly.<br />

Things have to work properly for at<br />

least 30 years,” comments Schmidt.<br />

The Global Castings Group<br />

The international Global Castings Group in Denmark has other production<br />

sites in Denmark, Sweden and China. The Group is owned by the VTC<br />

holding company in Munich. www.globalcastings.com<br />

The production site of Ervin Amasteel Germany is located in Glaubitz.<br />

The parent company is located in the USA. www.ervin.eu<br />

Figure 1: Production Manager Oliver Schmidt (left) and Marian Bienek (Photo: Ralf Paarmann)<br />

An Amamix from Ervin<br />

Amasteel, made up of shot<br />

and grit, was the favourite<br />

So Global Castings started scouring<br />

the European market for a new steel<br />

blasting-media that could meet all<br />

the demands. In the end, a product<br />

from blasting-media producer Ervin<br />

Amasteel proved decisive. The right<br />

blasting-media mix was quickly found<br />

in collaboration with the experts from<br />

Ervin (which has been operating a<br />

production site in Glaubitz in Saxony<br />

since 2014). A mixture of high-carbon<br />

round grain (shot) and a medium-hard<br />

high-carbon angular grain (grit) was<br />

chosen. A series of tests in the laboratory<br />

showed that the Amamix (Figures 2<br />

and 3) would probably not only meet,<br />

but clearly exceed, the requirements of<br />

Global Castings.<br />

<br />

in practice<br />

Workpieces at Global Castings are<br />

blasted via seven turbines in an overhead-rail<br />

blasting-plant designed for<br />

large castings. All the laboratory results<br />

with the Amasteel blasting-media<br />

were confirmed here. Without<br />

damaging the material surfaces, the<br />

cleaning performance of the Amamix<br />

was considerably better than<br />

that achieved with the previous blasting-media.<br />

Furthermore the low consumption<br />

of the Amasteel product was<br />

a positive side effect. No detour via<br />

Denmark has been necessary for the<br />

castings since then.<br />

38 Casting Plant & Technology 2 / <strong>2017</strong>


It was not only the result that impressed<br />

Schmidt, but also the straightforwardness<br />

of the blasting-media producer:<br />

“We explained what we needed<br />

and that is precisely what we got. There<br />

was a mutual exchange of experiences<br />

that rapidly brought us to our objective.<br />

And when we at Global Castings<br />

see that the path taken is going in<br />

the right direction, then we consistently<br />

continue along it and make the appropriate<br />

investments.”<br />

The direction is towards large<br />

castings in serial production<br />

This is equally true of the entire development<br />

of the company in Stade. For,<br />

while others are getting smaller and<br />

disappearing into micro-technology,<br />

precisely the opposite is taking place<br />

at Global Castings. “The future is big,”<br />

Schmidt is certain. The production processes,<br />

the casting plant and the finishing<br />

work with the installation of two<br />

enormous new machining centres, are<br />

designed for high-volume production at<br />

the foundry. In addition, there will soon<br />

be a second blasting-shop to ensure<br />

that surface treatment does not lag behind<br />

at Stade. The production of higher<br />

unit weights in serial quality makes the<br />

foundry unusual in the sector.<br />

Figure 2: Amamix fresh grain (Photos: Axel Elkemann/Amasteel)<br />

Figure 3: Amamix operating mixture.<br />

Port terminal was an important<br />

locational factor<br />

The site at Stade was deliberately chosen<br />

from this point of view. In addition<br />

to the modern foundry, there is a port<br />

terminal on the company grounds – a<br />

decisive factor. The extremely heavy<br />

workpieces can be delivered rapidly<br />

and economically to their destinations<br />

by ship from the port. The personnel<br />

at Stade want nothing to do with the<br />

rigid and closed image that foundries<br />

have. “We are open at Global Castings<br />

and have discussions with other companies.<br />

Our own employees also come<br />

from a variety of sectors. One constantly<br />

has to learn, develop and improve,”<br />

states Schmidt. The company leaves<br />

nothing to chance in its continuous<br />

optimization process, because potential<br />

is often found in the little things,<br />

even for those who play big as in this<br />

case with the blasting-media.<br />

http://ervinamasteel.eu<br />

Casting Plant & Technology 2 / <strong>2017</strong> 39


COMPANY<br />

Dieter Beste, Düsseldorf<br />

Matthies Druckguss: combining<br />

tradition with innovation!<br />

Longstanding customers and loyal personnel – Jörn Matthies has many constants at his works.<br />

After all, Matthies Druckguss is a real family-run company whose 60-year history makes it highly<br />

appreciative of its values. There is also, however, a lot of change in the range of activities offered<br />

by Matthies Druckguss. And a focus on the future. Important prerequisites that enable the entrepreneur<br />

to compete on the market, and even prove that he is a pioneer<br />

Since 1974 Jörn Matthies has been continuing<br />

what his father, Willy Matthies,<br />

started in 1955: die-casting production.<br />

In 2008 Jörn’s son Marco also<br />

joined Matthies Druckguss as Works<br />

Manager. And with him 20 more employees<br />

in production and administration.<br />

Many of the personnel have been<br />

loyal to the company for more than 25<br />

years. A real family-run company. And<br />

one that can evidently take on the big<br />

players. This is no accident, but the result<br />

of an unflagging innovative spirit.<br />

The company’s impressive variety of<br />

working materials, for example, is convincing:<br />

it offers a total of nine different<br />

aluminum, zinc and brass alloys.<br />

Moreover, the company undertakes<br />

unit numbers that competitors only<br />

rarely offer – with minimum runs from<br />

just 1,000 units per series. That this is<br />

profitable, despite the high mold costs<br />

that initially accrue for die-casting, is<br />

also due to the large number of active<br />

customers. Many of them regularly<br />

have their castings produced by Matthies,<br />

sometimes over decades. This is<br />

another steady feature of the company’s<br />

history. In addition to German<br />

customers, Matthies also supplies companies<br />

from Austria, Romania, Norway<br />

or India, for example. Customers come<br />

from the most varied of sectors: from<br />

machine construction to sanitary engineering.<br />

Most of the products are<br />

destined for use in safety technology<br />

and shading equipment (including<br />

castings for awnings, blinds and other<br />

elements that provide protection<br />

Successful together! The Matthies team builds upon personal contact, a holistically functioning process chain, and extensive expertise<br />

(Photos: Matthies).<br />

40 Casting Plant & Technology 2 / <strong>2017</strong>


against the sun). New markets have<br />

been opened up in the lighting industry<br />

thanks to the increasing use of LED<br />

technology.<br />

A holistic process chain for<br />

high added value<br />

The company’s ambition is to present<br />

customers with precisely the result<br />

that they want. And with a quality that<br />

sets standards. In order to ensure that<br />

this is the case, Matthies Druckguss<br />

employs a completely holistic process<br />

chain – from the very first consultation,<br />

through acceptance of the pattern,<br />

to production itself. This also includes<br />

the machining that gives the<br />

products their final finishing touches.<br />

CNC processing and milling are now<br />

an integral part of the company’s portfolio,<br />

further distinguishing Matthies<br />

from the pack.<br />

And the company never loses sight<br />

of quality management, including<br />

not just inspection and measurement<br />

technology, but also the regular training<br />

of employees. This keeps standards<br />

high. Finally, the company maintains<br />

its own forwarding company – ensuring<br />

reliable, safe deliveries that arrive<br />

on time.<br />

Matthies cast design – surface<br />

<br />

The brand Matthies cast design is the<br />

company’s latest milestone. This process<br />

of surface finishing makes it possible,<br />

for the first time, to produce optically<br />

high-quality die-castings with<br />

A good ERP system supports the employees<br />

with documentation and archiving.<br />

Matthies exploits state-of-the-art measuring equipment and inspection methods, such<br />

as X-ray inspection, spectral analyses and heat-imaging cameras<br />

<br />

in compliance with the DIN EN ISO<br />

9001:2008 standard since 2003<br />

Casting Plant & Technology 2 / <strong>2017</strong> 41


COMPANY<br />

high-gloss polishing. And economically<br />

too, which in turn ensures that<br />

the castings can be used for decorative<br />

purposes.<br />

Thus, for example, high-gloss polished<br />

aluminum castings are excellent<br />

for the furniture industry, for the interiors<br />

of vehicles, or for décor. The production<br />

process is also advantageous<br />

for corrosion protection. The new process<br />

helps protect the environment<br />

and cuts costs because it does not require<br />

any expensive galvanic chrome<br />

plating of the parts. The use of acids,<br />

chemical cleaners and additional polishing<br />

waxes is also unnecessary, and<br />

the electricity consumption of the production<br />

steps is considerably reduced.<br />

Customers expect complete<br />

solutions<br />

Jörn Matthies considers activities such<br />

as these vital if his company is to remain<br />

competitive in the long term,<br />

“Customers do not want to take any<br />

risks nowadays. They therefore expect<br />

a single contact that will take on the<br />

entire responsibility, consolidate their<br />

requirements, and offer them complete<br />

solutions. This has changed our<br />

role enormously over time: we now<br />

mainly consider ourselves to be service<br />

providers.” And many customers want<br />

to keep their stocks to a minimum –<br />

which is fine for Matthies considering<br />

the low unit numbers that they can<br />

deliver if necessary. Despite his service-provider<br />

attitude, however, the<br />

entrepreneur also considers a cooperative<br />

approach with his customers important:<br />

“Both sides should make sure<br />

that the joy of doing business remains<br />

intact, and that one can meet and work<br />

together as equals.”<br />

Exchanges within the sector<br />

How are customer demands changing?<br />

What direction is the market<br />

taking? These are also questions that<br />

interest the Coastal Group of the German<br />

Foundry Association (BDG). The<br />

Committee represents eight northern<br />

German foundry companies. Jörn<br />

Matthies has been involved with it as<br />

the Chairman for six years. He profits,<br />

above all, from the possibility of<br />

exchanging information within the<br />

Matthies Druckguss is now managed by Jörn Matthies. Since 2008 he has been supported<br />

by his son Marco Matthies (right) as Works Manager<br />

View of the production hall at Matthies Druckguss<br />

sector. “The Group provides an ideal<br />

platform for discussing certain topics<br />

and for learning from the experiences<br />

of the other members.” The agenda<br />

often includes costs meetings, for example,<br />

at which representatives from<br />

the companies discuss price structures<br />

in the sector as well as savings potentials.<br />

“This allows us to better assess<br />

where we stand and what challenges<br />

we will have to expect in the future.”<br />

And he does not underestimate the importance<br />

of this opportunity to drive<br />

forward BDG activities, and thus influence<br />

political decisions made in the<br />

sector’s interests.<br />

In November 2016 the company was<br />

re-certified as being in compliance<br />

with DIN EN ISO 9001:2008. A sign<br />

that Matthies Druckguss continues to<br />

take his values and intentions seriously<br />

– and is working to achieve the best<br />

castings results for his customers.<br />

www.druckgiesser.com<br />

42 Casting Plant & Technology 2 / <strong>2017</strong>


NEWS<br />

RGU<br />

<br />

Since November 2016, RGU GmbH,<br />

Dortmund, Germany, has a new presence<br />

in the Asia-Pacific region with an<br />

operation based in Singapore covering<br />

all markets as its regional Headquarter.<br />

“The new entity opens up possibilities<br />

for strategic and project-related<br />

work directly on site. We believe in this<br />

region and are establishing our RGU.<br />

FRP software family here – increasing<br />

our presence in the Asia-Pacific region,”<br />

says Ronald Kreft, Managing Director<br />

of RGU GmbH.<br />

RGU was founded in 1984. For more<br />

than 30 years the company has been<br />

delivering specific software solutions<br />

to foundries. From the initial enquiry<br />

through to when cast parts are ready<br />

for shipment, RGU supports processes<br />

with its RGU.FRP software.<br />

Because RGU focuses exclusively on<br />

foundries, FRP stands for Foundry Resource<br />

Planning (derived from Enterprise<br />

Resource Planning, ERP).<br />

<br />

UNIVERSITY OF KRAKOW<br />

<br />

<br />

This year the Faculty of Foundry Engineering<br />

in Krakow, Poland, can look<br />

back on 65 years of R&D in foundry<br />

technology. The occasion was celebrated<br />

in a two-day event in Krakow.<br />

Two scientific sessions for graduate and<br />

PhD students were held on the first<br />

day along with an industries session<br />

where, amongst other things, practice<br />

in foundries and modern research solutions<br />

and measuring instruments for<br />

science and industry were considered.<br />

The day of celebrations ended with a<br />

traditional Foundryman’s Ball organized<br />

by the faculty student council<br />

at the Faculty of Foundry Engineering.<br />

The main part of the 65th anniversary<br />

of the Faculty of Foundry Engineering<br />

took place on the second day<br />

in the Witek Conference Center in Krakow.<br />

This Jubilee gathered together<br />

over 200 participants and was attended<br />

by the department staff and a large<br />

group of invited guests, representing<br />

the domestic and foreign research<br />

units and academic associations related<br />

to casting. The anniversary was attended<br />

by representatives of international<br />

scientific institutions including<br />

the University of Jonkoping, Sweden,<br />

the University of Bucharest, Romania,<br />

the Central Metallurgical R & D Institute,<br />

Egypt, and the University of Burgundy,<br />

France.<br />

The Faculty of Foundry Engineering<br />

at AGH (AGH University of Science and<br />

Technology Krakow) educates specialists<br />

for the whole spectrum of foundry<br />

technology, making it a unique faculty<br />

of this profile and scope within universities<br />

in Poland and Europe. The Faculty<br />

educates in two fields of study – engineering<br />

of foundry processes and<br />

computer-aided engineering processes<br />

– and offers full-time and extramural<br />

engineering, MA and PhD courses.<br />

There are four departments: the department<br />

of foundry process engineering;<br />

the department of cast alloys and<br />

composites engineering; the department<br />

of molding materials, mold technology<br />

and cast non-ferrous metals;<br />

and the department of chemistry and<br />

corrosion of metals. A very important<br />

activity is the collaboration with leading<br />

universities and research centres in<br />

Poland and abroad. The Faculty actively<br />

co-operates with approx 80 % of the<br />

country’s almost 500 foundries.<br />

Source: Foundry Trade Journal<br />

<br />

Casting Plant & Technology 2 / <strong>2017</strong> 43


NEWS<br />

<br />

<br />

Two companies – O/Cava Meccanica<br />

S.P.A., Ferrere, Italy and Heinrich Wagner<br />

Sinto (HWS), Bad Laasphe, Germany<br />

– have committed themselves to a<br />

joint approach towards the foundry industry,<br />

based on trust and mutual technical<br />

expertise.<br />

O/Cava Meccanica is a leading company<br />

producing high-quality casting<br />

components for industrial vehicles, axles<br />

and agricultural machinery. It<br />

strives to offer customers high-tech finished<br />

products with high added-value.<br />

HWS, a world-class manufacturer of<br />

tight-flask molding lines, aims to continue<br />

its approach to achieve perfection<br />

in every single mold.<br />

In May <strong>2017</strong>, HWS was awarded an order<br />

for a completely new molding line for<br />

O/Cava Meccanica’s foundry in Ferrere.<br />

Flask size is 940x940x400+60/350 mm<br />

with a maximum capacity of 200 molds<br />

per hour. The line is equipped with a ZFA-<br />

SD 5 twin-molding machine with Seiatsu<br />

airflow and multi-ram piston squeezing,<br />

combined with Seiatsu.plus cope and<br />

drag from the pattern side. It completely<br />

replaces the old molding machine and<br />

line installed in 1990.<br />

Initial concept meetings between O/<br />

Cava and HWS took place about threeand-a-half<br />

years ago. Various scenarios<br />

were discussed before finally achieving<br />

<br />

<br />

joint approval of a new concept converting<br />

a molding line with vertical and<br />

horizontal electro-mechanical drive<br />

systems and cooling inside the cooling<br />

house to double cooling jackets within<br />

a welded structure.<br />

Just two years ago, O/Cava awarded<br />

HWS an order to replace the existing<br />

Mecana pouring automat. Nine months<br />

later, the new HWS automatic pouring<br />

system passed the final acceptance test.<br />

During the design, installation and<br />

commissioning phases both companies<br />

confirmed that this partnership would<br />

be further expanded, and that that they<br />

would team up to rebuild the heart of<br />

the foundry, i.e. the molding plant.<br />

<br />

<br />

MONOMETER ROTARY FURNACES<br />

<br />

Refining technology by Monometer,<br />

Leigh-on-Sea, UK is now being applied<br />

successfully to achieve selective removal of<br />

heavy metal impurities down to 100ppm<br />

in copper secondary metallurgy. Related<br />

applications for this technology include<br />

degassing, desulphurization and decarburizing.<br />

Metallurgical treatment combines<br />

flux injection with gaseous diffusion and<br />

is supported by plc-controlled and repeatable<br />

variable flame chemistry.<br />

Utilizing established Monometer rotary<br />

furnace operating parameters and<br />

design, the Monometer refining technology<br />

integrates seamlessly with existing<br />

processes of smelting, refining and<br />

alloying. With optional retro-integration,<br />

foundries achieve the higher purities<br />

and specifications of products typically<br />

associated with more costly feed<br />

materials – despite using lower-grade<br />

charge materials.<br />

The rotary furnace technology of the<br />

British company extends to smelting<br />

the typical foundry dross and oxide<br />

wastes formed during normal furnace<br />

operations. Each of the smelting, refining<br />

and alloying processes is carried out<br />

Monometer Rotary Furnace<br />

(Photo: Monometer)<br />

44 Casting Plant & Technology 2 / <strong>2017</strong>


in a single furnace system for a range of<br />

metal specifications while avoiding carryover<br />

contamination between cycles.<br />

For example, Monometer’s recent installation<br />

in the Chelyabinsk region of<br />

Russia enabled the production of copper<br />

granules from Birch/Cliff scrap to a suitable<br />

specification for the ultimate production<br />

of copper sulphate for the food industry.<br />

Monometer supplied the turnkey<br />

installation including the furnace system,<br />

charger, flux injector, refining injection<br />

technology and bag house filter system.<br />

The Monometer furnace system is typically<br />

supplied with a 4.5 to 6 tonne capacity<br />

Monometer rotary tilting furnace, although<br />

furnaces with bath capacities up<br />

to 10 m 3 are available as standard. All furnace<br />

sizes are suitable for higher temperature<br />

processes, such as the treatment of<br />

copper concentrate, sponge iron and<br />

metallur gical adjustment of cast irons, or<br />

may be applied to applications such as degassing<br />

of aluminium, by the diffusion of<br />

argon or nitrogen, and targeted element<br />

removal such as for sulphur and carbon.<br />

Heavy metals such as nickel require cycles<br />

of selective flux treatment in the process of<br />

oxidation followed by reduction. Other<br />

components of the plant may include the<br />

Monometer low dust and low noise rotary<br />

charger, porous gas diffusion technology,<br />

oxy-fuel burner system, exhaust filter for<br />

all particulates and fines including hooding,<br />

settler, bag filter, the fluxing agents injector,<br />

and consumable spare parts.<br />

Monometer continues to develop rotary<br />

furnace technology to increase flexibility<br />

and thermal efficiency. As part of this programme<br />

fully regenerative burner systems<br />

suitable for a range of medium temperature<br />

processes are now supplied in areas where<br />

oxygen is either relatively expensive or<br />

practically unavailable.Regenerative burners<br />

offer energy efficiency and reduced cycle<br />

times approaching the performance of<br />

oxy-fuel melting, without consuming<br />

bought-in oxygen. Monometer’s lower cost<br />

options for burner technology include low<br />

no x<br />

systems operating with high efficiency<br />

multi-pass tubular recuperators, and a<br />

range of low and medium pressure burners.<br />

All Monometer burners are designed to operate<br />

with most liquid fuels incl. standard<br />

furnace and diesel oils, reclaimed oils, coal<br />

tar fuels and many bio fuels.<br />

<br />

Void in casting, after<br />

machining, seen with a<br />

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Manufacturers of complex castings now have a fast, affordable<br />

way to improve quality control in their visual inspection process<br />

with Hawkeye ® Pro Borescopes. We stock over 80 models of rigid,<br />

flexible and video borescopes, and accessories. The right scope for<br />

your application can deliver detailed images of sand, voids, flash,<br />

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NEWS<br />

<br />

<br />

South Africa is actively expanding<br />

supply-side support for local metals<br />

and components manufacturing as<br />

the manufacturing industry moves<br />

into the fourth industrial revolution.<br />

In addition, South African (SA) metal<br />

casting businesses need to transform<br />

in terms of human capital, innovation<br />

and sustainability to arrest the decline<br />

of the sector and compete on a global<br />

scale.<br />

South Africa has about 170 foundries<br />

which directly employ about 9,500<br />

people. A total of 25 foundries have<br />

closed in South Africa since 2010, shedding<br />

1,600 jobs.<br />

This emerged at the Metal Casting<br />

Conference in March which was held<br />

in Johannesburg and included the<br />

World Foundry Organisation (WFO)<br />

Technical Forum as well as the 7th<br />

BRICS Foundry Forum.<br />

“In the next Industrial Policy Action<br />

Plan (IPAP), we are emphasizing the<br />

importance of supporting the metals<br />

and casting industries to modernize<br />

and grow. This requires support in<br />

terms of research and development,<br />

human resource development and<br />

supply-side support in the form of incentives<br />

for the metals and agroprocessing<br />

industries. Along with demand-side<br />

initiatives, such as local<br />

procurement designations, this support<br />

will help to grow demand,” said<br />

General Lionel October, Director of the<br />

South African Department of Trade &<br />

Industry.<br />

The 291 delegates heard emphasis<br />

being given to new markets and strategy<br />

as well as leaders for the future in<br />

the plenary sessions. Metallurgy, technology<br />

and processes were covered in<br />

industry and technical presentations<br />

as well as academic streams, and 28 exhibitors<br />

participated in the exhibition.<br />

John Davies, CEO of the South African<br />

Institute of Foundrymen, said,<br />

“Foundries need to embrace and adapt<br />

to the new manufacturing technologies<br />

of the fourth industrial revolution<br />

by being informed of the latest research<br />

and developments. While there<br />

are challenges, ultimately there is a<br />

need to modernize for sustainability.”<br />

Some of the challenges faced by<br />

foundries include the costs of compliance<br />

with new regulations, such as air<br />

emissions standards. They put a strain<br />

on small and medium-sized foundry<br />

<br />

-<br />

<br />

businesses, which are also dealing with<br />

a lack of off-take agreements and high<br />

levels of capital investment requirements<br />

due to ageing infrastructure and<br />

capital equipment.<br />

The 7th BRICS Foundry Forum, in<br />

conjunction with the World Foundry<br />

Organisation working group for Human<br />

Capital Development, hosted a<br />

collaboration workshop with international<br />

and local industry players to<br />

find practical and immediate actions<br />

to drive the growth of the global industry.<br />

<br />

<br />

New site in China<br />

In order to meet the increasing demands of clients throughout<br />

the country and serve as a hub to support clients and projects<br />

throughout the Asia Pacific region, the site of Italpresse<br />

in China has been relocated to a larger shop in Kunshan.<br />

Italpresse, Capriano del Colle, Italy, has been active in<br />

China since 1990 and the branch in Shanghai was established<br />

in 2005 with the aim of supporting sales activities,<br />

project management and service for local customers.<br />

ConviTec<br />

Vibration machines and conveying technology<br />

Project planning – Manufacturing - Service<br />

www.convitec.net · 069 / 84 84 89 7- 0<br />

The site will be coordinated by Marco Antonacci, the new<br />

General Manager of Italpresse Kunshan Die Casting Equipment,<br />

CO, LTD., who will be supporting customers as regards<br />

sales, spare parts, service and technical requests with the cooperation<br />

of the onsite sales and service team.<br />

“Our expansion in China’s market reflects our continuing<br />

commitment to providing superior service to our global clients<br />

as well as our local China-based clients,” stated Antonacci,<br />

“The entire Asia-Pacific market remains a key strategic<br />

area for Italpresse.”<br />

Every year the Chinese market demands further improved<br />

quality and performance, which is why Italpresse intends to<br />

improve its presence in China. The new site intends to meet<br />

the needs of the customers, increasing spare parts availability<br />

on site, customer care and project management capability.<br />

<br />

46 Casting Plant & Technology 2 / <strong>2017</strong>


In the manufacture of castings, the molten<br />

metal’s temperature is still often<br />

measured manually with immersion<br />

thermometers. For measuring, the immersion<br />

probe is dipped into the melt.<br />

A new element is necessary for each<br />

measurement. Because of costs of about<br />

1 US-dollar (0.9 euro) per element, the<br />

mere running costs reach several thousand<br />

dollars a year. Excluding costs for<br />

the operating personnel.<br />

With the modern CellaTemp PT 183<br />

infrared thermometer from Keller HCW,<br />

Ibbenbüren-Laggenbeck, Germany, the<br />

operator of the casting machine can<br />

now measure infrared radiation – and<br />

thus the temperature of the molten<br />

metal – without contact and from a safe<br />

distance. The device, specially developed<br />

for measuring molten metals, can<br />

detect the correct temperature of slag<br />

and oxide-free surfaces within seconds<br />

due to its intelligent filter function. The<br />

two-color or dual wavelength measuring<br />

method ensures stable and accurate<br />

temperature readings, despite dust and<br />

smoke in the field of view. The rectangular<br />

measuring area of the pyrometer<br />

also contributes towards reliable measurement,<br />

even in a fluctuating pouring<br />

stream.<br />

The portable CellaTemp PT 183 is<br />

used at the runner of blast and cupola<br />

furnaces, when pouring into the ladle,<br />

and especially when pouring the melt<br />

into molds. This measuring location, in<br />

particular, is decisive for the process and<br />

enables the control and documentation<br />

of compliance with the permitted pouring<br />

temperature for each casting produced.<br />

Proof of compliance with the necessary<br />

pouring temperature cannot be<br />

provided because the temperature is<br />

measured using immersion probes in<br />

the furnace or ladle before filling. Complex<br />

components have a scrap rate well<br />

over 10 %. Measurement with the pyrometer<br />

can reduce the scrap rate to below<br />

3 %. The resulting cost savings amount<br />

to several thousand dollars a month, depending<br />

on output quantities.<br />

Fixed measuring systems with connection<br />

to central data acquisition are<br />

available on the market. The CellaTemp<br />

PT 183 mobile device is used for quick<br />

checks in between. A patented traffic<br />

light status indicator, integrated in the<br />

viewfinder, tells the user the optimum<br />

measuring distance.<br />

In contrast to immersion thermometers,<br />

infrared thermometers are wearfree,<br />

maintenance-free and extremely<br />

long-lived. Investment costs are therefore<br />

amortized in 2 - 3 months.<br />

<br />

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BROCHURES<br />

Briquetting systems<br />

4 pages, English<br />

This brochure outlines the range of metal chips briquetting machines offered by RUF<br />

Maschinenbau. With the systems, metals can be processed into briquettes measuring<br />

between 60x50 mm and 150x120 mm with throughput rates between 30 and<br />

tive<br />

briquette formats.<br />

Information: www.briquetting.com<br />

Foundry vibratory equipment<br />

14 pages, English<br />

Specialists in vibratory equipment, interVIB, manufacture a wide range of machinery for<br />

-<br />

<br />

trough conveyors, vibratory screens, etc.<br />

www.intervib.de<br />

Solutions for the foundry industry<br />

8 pages, English, German<br />

This brochure provides an overview of the wide range of vibration and conveying sys-<br />

<br />

molding, core sand transport and recycling solutions, including the lost foam process<br />

and melting operations.<br />

Information: www.joest.com<br />

LIBS element analyzers for the recycling industry<br />

12 pages, English<br />

In this brochure, SECOPTA describes the advantages of employing LIBS (Laser Induced<br />

<br />

grouping of aluminium alloys, assorting low-alloy steel scrap, separating stainless steel<br />

<br />

<br />

Information: www.secopta.de<br />

48 Casting Plant & Technology 2 / <strong>2017</strong>


Engineered valves for critical applications<br />

24 pages, English<br />

A comprehensive brochure detailing the range of valves engineered by IMI TH Jansen<br />

for applications in areas such as iron and steel, water management, and chemical and<br />

-<br />

<br />

Information: www.imi-critical.com<br />

Strip centre measurement at high temperatures<br />

6 pages, English<br />

<br />

EMG-Vivaldi® sensor designed for measurements through the furnace insulation and<br />

an enclosed, gas-tight plate on the furnace wall. The system is based on the use of a<br />

ultra-wideband slot antenna, which is also called Vivaldi antenna.<br />

Information: www.emg-automation.com<br />

Coatings<br />

20 pages, English<br />

A brochure providing information about coating products offered by SG Group. Includ-<br />

<br />

for steel and iron castings, lost foam casting, metal mold surfaces in aluminium casting<br />

and specialized products such as chill coatings.<br />

Information: www.shengquan.com<br />

Sand plant installations<br />

2 pages, English<br />

<br />

systems built by JML, including all stages of the sand preparation processes from the<br />

-<br />

<br />

Information: www.jml-industrie.com<br />

Casting Plant & Technology 2 / <strong>2017</strong> 49


Fairs and Congresses<br />

Metal + Metallurgy China <strong>2017</strong><br />

<br />

<br />

Metef <strong>2017</strong><br />

<br />

www.metef.com<br />

5. <strong>International</strong> Cupola Conference<br />

<br />

www.bdguss.de<br />

2. <strong>International</strong> Thermprocess Summit<br />

<br />

<br />

China Diecasting + Aluminium <strong>2017</strong><br />

<br />

<br />

57th <strong>International</strong> Foundry Conference <strong>2017</strong><br />

<br />

<br />

Advertisers´ Index<br />

Admar Group 45<br />

AGTOS Ges. für technische<br />

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Jasper Ges. für Energiewirtschaft und<br />

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PREVIEW / IMPRINT<br />

Preview of the next issue<br />

Publication date: September <strong>2017</strong><br />

Brake disk production at Grohmann Aluworks GmbH & Co. KG<br />

Selection of topics:<br />

M. Holzapfel: Grohmann relies on new software<br />

In order to remain competitive, foundry company Grohmann from Bisingen, Germany, has replaced its insulated IT landscape<br />

with software that has also rationalized and optimized business processes throughout the company.<br />

C. Gallerne: Virtual manufacturing solution for castings<br />

Until recently, there has been a lack of simulation solutions that take the real performance of die-casting machines into account.<br />

Procast is software that calculates the hydraulic injection force by including geometrical and gas counter-pressure.<br />

T. Möldner: From simulation to the optimized furnace<br />

Researchers have developed a system for monitoring and controlling the melting process, enabling a significant reduction<br />

in melting times and improvements in energy efficiencies of up to 15%.<br />

Imprint<br />

Publisher:<br />

German Foundry Association<br />

Editor in Chief:<br />

Michael Franken M.A.<br />

Editor:<br />

Robert Piterek M.A.<br />

Editorial Assistant:<br />

Ruth Frangenberg-Wolter<br />

P.O. Box 10 51 44<br />

D-40042 Düsseldorf<br />

Telephone: +49 211 6871-358<br />

Telefax: +49 211 6871-365<br />

E-mail: redaktion@bdguss.de<br />

Published by:<br />

Giesserei-Verlag GmbH<br />

P.O. Box 10 25 32<br />

D-40016 Düsseldorf, Germany<br />

Telephone: +49 211 6707-0<br />

Telefax: +49 211 6707-597<br />

E-Mail: cpt@stahleisen.de<br />

Managing Director:<br />

Frank Toscha<br />

Advertising Manager:<br />

Katrin Küchler<br />

Circulation:<br />

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Casting Plant & Technology 2 / <strong>2017</strong> 51

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