Apparatus for refining polymeric material

Details Apparatus for refining polymeric material Apparatus for refining polymeric material

1975-04-23

1976-07-13

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

259191, 425378R, B29F 302

Patent

active

RE0289019

ABSTRACT:
An extruder apparatus for working polymeric material having a feed screw with dual flight defining a primary channel and a secondary channel. The primary channel progressively decreases in cross-sectional area while maintaining a constant width in cooperation with the secondary channel that increases in cross-sectional area to accommodate all the melt as it changes from a solid phase to a fluent phase. The secondary flight's height is such as to accommodate the melt as it is formed in the primary channel.

REFERENCES:
patent: 2343529 (1944-03-01), Brown
patent: 2746089 (1956-05-01), Hendry
patent: 3271819 (1966-09-01), Lacher
patent: 3650652 (1972-03-01), Dray et al.
patent: 3698541 (1972-10-01), Barr

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