Screw for double-shaft extruding device and double-shaft extrudi

Details Screw for double-shaft extruding device and double-shaft extrudi Screw for double-shaft extruding device and double-shaft extrudi

1995-05-02

1996-08-13

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Plural means being diverse, or parallel and intermeshing or...

425208, 425363, 425380, B29C 4740, B29C 4760

Patent

active

055450245

ABSTRACT:
A screw for a double-shaft extruding device having a shaft and a spiral flight provided at an outer periphery of the shaft. A height of the flight from an axis of the shaft is substantially constant. An angle of torsion of a spiral of the flight becomes smaller toward a shaft distal end. A cross-sectional area of extrusion formed by the shaft and the flight continuously increases from the shaft distal end to a shaft proximal end. Material can be smoothly discharged and completely extruded.

REFERENCES:
patent: 4304539 (1981-12-01), Hagiwara et al.
patent: 4708618 (1987-11-01), Herrington
patent: 4708623 (1987-11-01), Aoki et al.
patent: 4859166 (1989-08-01), Hamada et al.
patent: 4872761 (1989-10-01), Goeyer
patent: 5114658 (1992-05-01), Katsaros

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