Method for the manufacture of shaped bodies formed from plastics

Details Method for the manufacture of shaped bodies formed from plastics Method for the manufacture of shaped bodies formed from plastics

1996-11-14

1998-09-08

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming electrical articles by shaping electroconductive...

364105, 364112, 364115, 364119, B29C 4738

Patent

active

058041168

ABSTRACT:
A method for the manufacture of shaped bodies by extrusion moulding of plastic-filler mixtures with filler contents of more than 50% by volume, preferably from 65 to 90% by volume, by means of an extruder with a conveying input zone. The method is restricted to use of fillers having good thermal conductivity. For carrying out the method, initially a mixture is manufactured from molten or fluid synthetic resin and the filler and this is ground and graded after cooling. Afterwards, there is extrusion of the ground mixture or of fractions separated from this and graded. According to a preferred variant of the method, an extruder is used for the extruding having a conveying input zone whose extrusion part consists merely of an input zone and an output zone. According to a further variant of the method, plates are manufactured by cutting up lengthwise a tubular extrusion emerging from the mouthpiece in the extruding and the casing of the extrudate thus obtained is bent flat and this extrudate is then cut up into plate lengths.

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Zusatzstoffe fur Kunststoffe 28:57-60 (1977).
Kurrer, H., Gefullte Polyolefine direkt extrudieren 83:17-21 (1993).
Patent Abstracts of Japan, vol. 174, No. 3364, Jun. 25, 1993 & JP 05 042582 (Furukawa Electric Co), Feb. 23, 1993.
Patent Abstracts of Japan, vol. 96, No. 001 & JP 08 001663 (Shin Etsu Polymer Co. Ltd) Jan. 9, 1996.

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