Coperion Gmbh

Michael Ahlgrimm

Hans-Joachim Sämann

Peter Munkes

Klaus Kapfer

Markus Nicklas

Günther Dehm

Dipl-Ing Michael Dürr

Olaf Hustert

Karl-Andreas Bauer

Bernhard Rotter

A device, to homogenise plastics material melts, has a homogenising element with a plurality of flow channels, which differ with respect to at least one feature from the group length, cross sectional area and cross sectional shape. When flowing through the homogenising element, the plastics material melt is divided into a plurality of part streams, which, in each case, flow through an associated flow channel. When leaving the respective flow channel the part streams have different flow speeds so the plastics material melt is expanded and sheared on transition to a uniform flow. As a result, a homogenisation of the plastics material melt takes place in a simple, efficient and effective manner.

Device and method for the homogenisation of plastics material melts

In a processing plant for producing plastics material granulate, the start-up takes place in such a way that a screw machine is firstly driven by means of a drive device and then plastics material to be processed is fed by means of a metering device into the screw machine. At least one conveying position of the plastics material in the screw machine is determined by means of a control device by evaluating at least one measuring signal. Depending on the conveying position determined, a granulating device is activated and put into operation. The method according to the invention allows a direct start-up of the processing plant without the use of a start-up valve. This ensures an easy and safe start-up of the processing plant.

Method for starting up a processing plant for producing plastics material granulate and processing plant for producing plastics material granulate

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Besigheim, Germany

Michael Ahlgrimm