Extrusion method and apparatus for producing a body from powder

Details Extrusion method and apparatus for producing a body from powder Extrusion method and apparatus for producing a body from powder

1991-12-02

1993-05-25

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

419 67, 425204, B29C 4736

Patent

active

052137376

ABSTRACT:
An improvement in a method and apparatus is provided in extruding a powder material to form an article, in which the material is passed through an extruder and then through a die, wherein the material is provided in the form of a mixture which includes a vehicle, the improvement comprising having one or more gear pumps in succession between the extruder and the die, so that the powder material passes through the gear pump(s) after it leaves the extruder and before it enters the die. The gear pump(s) can have one or more pair of gears which are arranged sequentially with respect to the flow of the material.

REFERENCES:
patent: 4501498 (1985-02-01), McKelvey
patent: 4632564 (1986-12-01), Kopernicky
patent: 4813863 (1989-03-01), Hahn et al.
patent: 4890996 (1990-01-01), Shimizu

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