Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including both heating and cooling means
Patent
1991-12-23
1993-11-23
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including both heating and cooling means
100 92, 100 93P, 100240, 425407, B30B 1534
Patent
active
052638413
ABSTRACT:
The present invention relates to a device for processing plastic waste, such as packaging foil of polyvinylchloride, polyethylene, polypropylene etc. into blocks by compressing it in a container. The processing of the plastic waste is achieved by compressing with a punch at a temperature of 120.degree.-180.degree. C. and a pressure of 250-400 g/cm.sup.2 and preferably at a temperature of 140.degree.-160.degree. C. and a pressure of 260-290 g/cm.sup.2, followed by cooling with air. The cooling is carried out by the introduction of air in the container by a fan, which cooling takes place in 5-15 minutes, and preferably 8-10 minutes. The device of the invention is provided with a punch, whereas the inner surfaces of said container and/or the punch are provided with a coating in order to prevent said softened and compressed plastic waste from adhering to the walls. The coating is preferably teflon, whereas the heating elements advantageously are electrical heating elements.
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WO80/02835, Gullberg, "Method and Apparatus for the Manufacture of Building Structural Blocks", Dec. 1980, 100/92.
Chiesa Richard L.
Thermopers B.V.
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