Rieter Automatik Gmbh

Automatik Apparate-maschinenbau Gmbh

Automatik-maschinenbau Gmbh

Jurgen Keilert

Alfred Nogossek

Harald Zang

Laurenz Hohm

Klaus-Rudiger Zinke

Helmut Meidhof

Frank Glockner

The invention relates to a method for manufacturing a foaming synthetic material, for example, polystyrol, by means of an extruder, in whose entry the synthetic material is fed, to which by means of a fumigation aperture foaming gas in a liquid form, for example pentane, is introduced at a pressure maintaining the foaming gas in its liquid form, whereby throughout a following extruder region, the synthetic material provided with the foaming gas is homogenecised. For processing the reusable synthetic foam, this foam is supplied in a shredded to the extruder, from which prior to the fumigation aperture by means of a degassing aperture gasses contained in the synthetic foam are extruded, whereby the degassing occurs so far away from the entry of the extruder that the synthetic material has at least reached a doughy state in the region of the degassing aperture, and degassing and fumigation are performed at such a distance from one another that the foaming gas supplied to the fumigation aperture cannot reached the region of the degassing aperture against the current of the synthetic material.

Method for manufacturing a foamable synthetic material from shredded foam

Process for the simultaneous drying and crystallization of

Device for cooling and granulating molten thermoplastic strands emerging

Process and device for drawing off and blocking off a melt

Device to collect and convey plastic strands, issuing from nozzles, on a discharge plate, over which cooling water flows, with a device to indicate the undisturbed passage of the plastic strands over the discharge plate or their accumulation on the discharge plate. At least one temperature-dependent electric resistor, which triggers a signal by way of a threshold value switch when the specified temperature is exceeded, is attached to a cooling water-free zone on the underside of the discharge plate in the region of impact of the plastic strands.

Device to collect molten plastic strands with a device to display the

Device for cooling, drying and granulating strands

An apparatus to cool and granulate strands discharged in a molten state from nozzles, particularly strands formed of plastics materials, includes a feeder trough having at its receiving end a collecting region disposed below the nozzles and a granulator at the opposite end thereof. The feeder trough includes over its entire length, a collecting region and a transport region, a longitudinally grooved perforated plate or screen material in which only a single strand is conducted along each groove, the strands being borne and guided along the grooves of the feeder trough by a gas current that passes through the plate material, aided by longitudinally directed gas current that may be blown along the grooves from a source disposed at the receiving end of the trough ahead of the collecting region.

Device for cooling and granulating molten strands

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Kleinwallstadt, Germany

Jurgen Keilert