Screw-type plastics extruder

Details Screw-type plastics extruder Screw-type plastics extruder

1976-06-04

1978-04-18

Flint, Jr., J. Howard

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

425208, 425378R, B29F 302

Patent

active

040854612

ABSTRACT:
This invention is a screw-type extruder for plastics comprising a screw in a cylinder providing a feed zone, a plasticizing zone and a homogenization zone. The screw threads in the plasticizing zone are provided with marginal passageways so small as to provide heat exchange between the plastic and the screw, the latter being heated by friction.

REFERENCES:
patent: 3271819 (1966-09-01), Lacher
patent: 3652064 (1972-03-01), Lehnen et al.
patent: 3867079 (1975-02-01), Kim
patent: 3941535 (1976-03-01), Street

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