Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Within pressurizing chamber
Patent
1990-05-11
1992-02-18
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
Within pressurizing chamber
26421123, 366 81, 366 88, 366 89, 425209, B29B 742
Patent
active
050889141
ABSTRACT:
An extrusion machine includes a barrel or cylinder which houses an extrusion screw. The screw includes a feed section into which powder material is fed. The material is then fed into a mixing section, then through a transition section and then to another mixing section and finally to a section for mixing and metering the material as it is fed to the die. The extrusion screw in each of the mixing sections includes a double flight for causing the material to move back and forth in each section as it is fed to the discharge end of the barrel. The mix and meter section also includes keys to further mix the material.
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Spirex Publication, "Screw and Barrel Technology" (no date available).
Davis Robert B.
Woo Jay H.
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