Extruder

Details Extruder Extruder

1994-09-28

1995-10-31

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

425204, 425205, 425209, 366 77, 366 79, 366131, B29B 738, B29B 774

Patent

active

054624266

ABSTRACT:
An extruder in which the joint between the downstream, forward end portion of a cylinder and a gear pump is always kept tight, so that molten resin material is prevented from leaking out. As the main discharge port of a diverter valve is prevented from shifting from the inhalation port of the gear pump at the joint therebetween, the flow passage at the joint is always smooth without a spot where the molten resin material collects. The quality of resin products thus becomes stable.

REFERENCES:
patent: 3700374 (1972-10-01), Matsuoka et al.
patent: 4075712 (1978-02-01), Geyer
patent: 4310251 (1982-01-01), Scharer et al.
patent: 4501498 (1985-02-01), McKelvey
patent: 4707139 (1987-11-01), Valenzky et al.
patent: 4750841 (1988-06-01), Hicks
patent: 4890996 (1990-01-01), Shimizu
patent: 5310256 (1994-05-01), Boden
Database WPI Week 8020, Derwent Publications Ltd., London, GB; AN 80-35814 & JP-A-52030751 *abstract*.
Patent Abstracts of Japan, vol. 12, No. 33 (C-472) Jan. 30, 1988 & JP-A-62182136 Aug. 10, 1987 *abstract*.
Patent Abstracts of Japan, vol. 17, No. 679 (M-1527) Dec. 14, 1993 & JP-A-05228921 Sep. 7, 1993 *abstract*.

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