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Recycling of Post-Consumer Plastics

Improved Details Increase Process Efficiency

Slide plate system for the material transfer opening between the cutter-compactor and extruder (figure: Artec)

At the plastics recycling equipment manufacturer Artec machinery GmbH, Kematen-Krems, Austria, the focus is on further development of the modular series for recycling of post-consumer plastics presented at the K 2013. These further developments are concentrated primarily on the cutting-compacting process as well as the connection between the cutter- compactor and the feed zone of the attached extruder.

To increase the efficiency of the cutting-compacting process, the housing of the cutter-compactor has been designed with double-wall construction and an intermediate layer of insulation. In addition to reducing the noise level, the startup time has been shortened through quicker attainment of the process temperature. In addition, an exhaust system integrated into the cutter-compactor hood removes the vaporized water. This reportedly permits processing of materials having a moisture content of up to 25 %. For highly responsive temperature control during the cutting-compacting process, a system was developed that does not require the otherwise commonly employed evaporative cooling in the material agglomerates created by injecting water into the compactor chamber. It operates with a chilled water pulsed-cooling system in two double-walled housing sections of the cutter-compactor positioned opposite one another.

At the same time, the connecting region between the cutter-compactor and feed zone of the extruder was developed further. With a device for individual adjustment of the size and relative position of the material transfer window for filling the extruder, over- and underfilling of the extruder feed zone can be prevented. In addition, a system consisting of two adjustable plates was placed between the extruder and cutter-compactor. Positioning the lower slide plate establishes a fixed material-specific basic setting. It covers the lower regions of the screw channels and in this way prevents reverse feeding of the material. As shown in the Figure, the position of the upper slide plate can be positioned by means of an electric motor drive while production is running, thereby optimizing the plasticating and conveying efficiency of the extruder.

The equipment control system has also been updated and now provides self-explanatory operation along with the ability to connect to the Internet in order to resolve service questions via tele-maintenance.

Fakuma Hall A6, boot 6107

Company profile

ARTEC machinery GmbH

Puchstrasse 76
AT 8020 GRAZ
Tel.: +43 7228 6979-0
Fax: +43 7228 6979-10

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