Extruder screw

Details Extruder screw Extruder screw

1980-08-27

1982-07-27

Jenkins, Robert W.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366323, 425376R, B29B 106

Patent

active

043414745

ABSTRACT:
An extruder screw having a root, a helical primary flight on the root and a helical barrier flight on the root and forming with the primary flight a solids channel and a melt channel. The width of the solids channel gradually decreases and the width of the melt channel gradually increases along an upstream zone of the melting section. The width of the channels gradually changes in a downstream zone of the melting section but substantially less than in the upstream zone.

REFERENCES:
patent: Re28901 (1976-07-01), Kim
patent: 3271819 (1966-09-01), Lacher
patent: 3358327 (1967-12-01), Maillefer
patent: 3375549 (1968-04-01), Geyer
patent: 3445890 (1969-05-01), Heston et al.
patent: 3650652 (1972-03-01), Dray et al.
patent: 3698541 (1972-10-01), Barr
patent: 3866890 (1975-02-01), Tadmor et al.
patent: 3888469 (1975-06-01), Geyer
patent: 3897938 (1975-08-01), Kim
patent: 4000884 (1977-01-01), Chung
patent: 4173417 (1979-11-01), Kruder

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