Rotary kneading screw

Details Rotary kneading screw Rotary kneading screw

1990-12-28

1991-11-12

Stinson, Frankie L.

Agitating

Stirrer within stationary mixing chamber

Rotatable stirrer

366 90, 366328, B01F 708

Patent

active

050642936

ABSTRACT:
This invention relates to a rotary kneading screw installed in an extruder for kneading a synthetic resin such as polyester or vinyl chloride with a material such as calcium carbonate, talc, glass fiber or carbon fiber. The rotary kneading screw comprises a plurality of kneading recesses formed along a helical direction, and resin flow passages formed at a helical pitch greater than that of the kneading recesses. These flow passages may cut in a single machining operation to achieve both a reduced operating time and reduced manufacturing cost.

REFERENCES:
patent: 3986709 (1976-10-01), Vermeulen
patent: 4107788 (1978-08-01), Anders
patent: 4779989 (1988-10-01), Barr
patent: 4846659 (1989-07-01), Nakamura
patent: 4925313 (1990-05-01), Nunn
patent: 4994223 (1991-02-01), Hestehave et al.

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