Stieler Kunststoff Service GmbH - Konstruktionsbüro Hein GmbH

Stieler Kunststoff
Service GmbH
Wittenstraße 12/14
D 38640 Goslar
Phone +49 (0)5321-334550 : Fax 334559
E-mail: info@stieler.de
Homepage: www.stieler.de
Konstruktionsbüro
Hein GmbH
Marschstraße 25
D 31535 Neustadt
Phone +49 (0) 5032-63151 : Fax 63116
E-mail: info@kb-hein.de
Homepage: www.kb-hein.de
Laser marking is more and more used in all areas. Even for materials like POM (white), that
were difficult to handle in the past, Barlog plastics GmbH was able to demonstrate a good
typeface by using a colour change at the Technology Workshop.
The simulation of distortion of
plastic materials and the ensuing
optimisation of geometries in order to reduce distortions was
displayed using examples at the exhibition stand of
Konstruktionsbüro Hein.
In order to produce plastic parts at a high reliability with
regard to the process, deadlines and dimensions, the distortion can be reduced significantly
in advance by taking a number of measures. If necessary, the remaining distortion is
compensated using negative correction – while maintaining the tangentialities. That means
that the tool is produced with certain curves in order that the resulting component will be
straight and according to the required dimensions. For semi-crystalline materials in particular,
the well-balanced temperature control of the tool is of high significance. Here, we provide
mould cores made from 1.2343 (HRC56) molten by laser with a temperature control close to
the contour, which will then be polished on the inside and coated against corrosion.
The move towards unleaded solders with higher soldering bath
temperatures results in a number of requirements for development and
processing in the E&E industry, regarding the plastic raw materials for
plugs, switches and other elements. Fa. Barlog plastics of Engelskirchen
(Germany) was able to present innovative solutions within the new
standards on environmental compatibility (e. g. Directive for the reduction of Waste Electrical
and Electronic Equipment) and the requirements for fire protection (e.g. IEC 60335-1) in
order that polyamides and polyester remain the number 1 construction materials in the future.
Some like it cold. Stieler Kunststoff Service
GmbH presented the COOL FLOW SYSTEM –
an already well-proven system for the injection
moulding of plastic materials that does not only
reduce distortions but also decreases the cycle
for gas injection moulding dramatically. At first,
the gas injection process is carried out
conventionally. Only after the volume shrinkage
of the plastic material is almost finished the cavity
is being rinsed using an especially developed ventilation system: A counter-pressure valve
rinses the cavity with nitrogen that is -25°C cold in order to additionally transfer the heat from
the inside. The tool developed for this procedure last year in cooperation with
Konstruktionsbüro Hein (Cold Handle) could meanwhile be tested with diverse procedures for
gas injection and thus provided us with further experiences we can use for new applications.
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