Innovative pressing technology - Sama
Innovative pressing technology - Sama
Innovative pressing technology - Sama
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Press release 29.11.2001<br />
INNOVATIVE PRESSING TECHNOLOGY WITH ARTICLE<br />
RIM FETTLING PERFECTED BY ROBOT<br />
from<br />
SAMA Maschinenbau GmbH<br />
(SACMI WHITEWARE)<br />
In 1998 SAMA had already introduced to the porcelain tableware industry the freely programmable robot <strong>technology</strong> for<br />
article rim fettling and sponging.<br />
Medard de Noblat in Limoges was a forerunner of this <strong>technology</strong>. As a result of the high quality demands of the so-called<br />
culinary porcelain at Medard de Noblat, the high pressure casting method was not used. Despite marked quality<br />
improvements, which the pressure casting process offered, specific deformation of the article after firing could not be ruled<br />
out. Isostatically pressed articles are superior to high-pressure cast ones in this respect. Hermes de Paris is Medard de<br />
Noblat’s biggest customer for whiteware. In order to fulfil the high quality demands of this customer, it was decided to opt for<br />
the SAMA iso-<strong>pressing</strong> <strong>technology</strong>.<br />
The fettling of non-round, multi-sided, rectangular and irregular shaped articles is problematical. SAMA, for the first time, has<br />
gone along a completely new route, using a robot technique with 6 axes. In order to be able to utilize the robot <strong>technology</strong> for
this purpose, new software had to be developed to make the programming for fettling irregular shaped articles easier. This<br />
technique has become part and parcel of the production <strong>technology</strong> at Medard de Noblat. A second Universal Fettling Robot<br />
UPR 1 has recently been commissioned.<br />
At Medard de Noblat this technique is still “off-line”, i.e. the pressed articles are placed manually into the centring device and<br />
fed to the universal fettling robot. In the patented large flatware isostatic line LPP 1-45/UPR 3 with 3 universal fettling robots,<br />
which was installed at Rosenthal’s Rothbühl factory, this process is fully automatic.<br />
The horizontal <strong>pressing</strong> plant LPP 1-45/UPR 3 produces the demanding Rosenthal range up the square, rectangular and<br />
irregular shaped articles with dimensions up to 500mm measured horizontally and a height of 150mm (in the green state). The<br />
pressed items drop from the press onto a discharge belt and transported to a pre-centring device. Then, by means of a vacuum<br />
sucker, they are transferred to the subsequent “flash breaking” and “position recognition” stations. At this latter station there is<br />
a digital camera, installed with the relevant software and interface, which transfers the determined coordinates to the<br />
appropriate fettling robot. In total there are three robots in operation in order to achieve the nominal output of ca. 350-400<br />
articles per hour. Each robot carries out its tasks quasi “autonomously”, i.e. each robot controls one dry and two wet<br />
processing stations. At the end of the cycle each robot places the finished article back onto the round table. Finally, the<br />
articles are transferred to a foot polishing station and then stacked.<br />
As a result of the high flexibility and exactness (+/- 0.1mm) of the robot fettling <strong>technology</strong>, further orders from Portugal, Italy<br />
and the States have been placed.
MANUFACTURING SEQUENCE<br />
ISOSTATIC DUST PRESS<br />
FLASH BREAKING<br />
COORDINATE MEASURING TABLE<br />
TURNING TABLE<br />
ROBOT<br />
TURNING TABLE<br />
PILING TABLE OR BELT
6 axes ensure the<br />
necessary amount of<br />
free play in the<br />
movement in order to<br />
guarantee the optimal<br />
edge finishing<br />
depending on the<br />
shape of the article.<br />
For example no dust<br />
and no „slip“ gets onto<br />
the article during the<br />
vertical working stage.
Patented System<br />
•Each robot carries out the complete job, without handing over to the next one<br />
•Therefore high performance and precision (+/- 0,1mm)<br />
One Robot can be used „offline“ in order to:<br />
•Install a new finishing program<br />
•While programming the plant can produce in automatic run with two robots<br />
•Produce at the same time a different article in „offline“ mode with manual feeding
SIMPLE PROGRAMMING:<br />
Teaching by point to point at the „Offline“-Robot<br />
•<br />
Optionally: By loading a CAD-file from an isostatic-<strong>pressing</strong> tool
EDGE FINISHING SYSTEM:<br />
Dry grinding with<br />
grinding belt or<br />
disc<br />
6 Axes<br />
Industrial<br />
Robot<br />
Sponging unit with<br />
contra rotating<br />
sponge reels<br />
Sponging unit with<br />
sponge belt or reel
Horizontal press for large tableware type LPP 1-45
Horizontal press for<br />
large tableware type<br />
LPP 1-45<br />
Side view with tool<br />
for square platter
6-Axes Industrial Robots with Turntable and Edge Trimming Units
Dry grinding with disc or belt Wet sponging and polishing
Layout from large tableware press type LPP 1-45/UPR 3