Degassing extruder

Details Degassing extruder Degassing extruder

1991-04-29

1992-08-25

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

With separate and distinct gas withdrawal chamber

366 80, 366 88, 366 89, 366 90, 425205, 425208, 4253761, 4253824, B01F 700, B29C 4700

Patent

active

051414260

ABSTRACT:
A single-screw degassing extruder for thermoplastic plastics materials and rubber is provided, wherein the pin-barrel and transfer sections, which are known per se and have only been used individually hitherto, are jointly used in one extruder. Throttle pins, which are disposed in the transfer section in the region of the greatest housing thread volume, permit universal use of the extruder in respect of the extruded material or combinations of extruded material and stripping agent, since the mixing efficiency of the extruder and the pressure of the extruded material upstream of a degassing opening in the extruder are thereby advantageously controllable.

REFERENCES:
patent: 3347528 (1967-10-01), List et al.
patent: 3367635 (1968-02-01), Gresch
patent: 3737151 (1973-06-01), Schaeffer et al.
patent: 4094942 (1978-06-01), Nakai et al.
patent: 4423960 (1984-01-01), Anders
patent: 4538917 (1985-09-01), Harms
patent: 4573799 (1986-03-01), Anders
patent: 4652138 (1987-03-01), Inoue et al.
patent: 4900494 (1990-02-01), Wobbe

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