Barrel for a twin screw extruder with an abrasion resistant laye

Details Barrel for a twin screw extruder with an abrasion resistant laye Barrel for a twin screw extruder with an abrasion resistant laye

1996-08-22

1998-05-19

Cooley, Charles E.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

B29B 748, B29B 758

Patent

active

057527709

ABSTRACT:
A barrel for a twin screw extruder having a pair of helical screws has a barrel body provided with a pair of partly overlapping cylindrical bores, and the pair of helical screws are rotatably supported in the pair of cylindrical bores of the barrel to mix and extrude a molding material. An abrasion resistant layer is formed in at least portions of the surfaces of the pair of cylindrical bores extending in the vicinity of at least one of the two lines of intersection of the pair of partly overlapping cylindrical bores. The abrasion resistance of the abrasion resistant layer has a maximum in a portion thereof around the line of intersection of the pair of cylindrical bores and decreases gradually with distance from the line of intersection. The abrasion resistant layer is formed by depositing a material containing a hard substance by build-up welding, and the hard substance content of the material in the abrasion resistant layer is varied with distance from the line of intersection. The abrasion resistant layer is formed by depositing a material consisting of a corrosion resistant base alloy and a hard substance. The abrasion resistant layer may be formed on a corrosion resistant layer formed over the entire surfaces of the pair of cylindrical bores.

REFERENCES:
patent: 3804382 (1974-04-01), Pultz
patent: 3900788 (1975-08-01), Seufert
patent: 4028027 (1977-06-01), Worz
patent: 4036540 (1977-07-01), Seufert
patent: 4117583 (1978-10-01), Gnadig et al.
patent: 4133460 (1979-01-01), Jerpbak
patent: 4364664 (1982-12-01), Theysohn
patent: 4383764 (1983-05-01), Sloin
patent: 4385876 (1983-05-01), Scherping et al.
patent: 4519713 (1985-05-01), Godsey et al.
patent: 4640672 (1987-02-01), Ellwood
patent: 4746220 (1988-05-01), Sukai et al.
patent: 5110284 (1992-05-01), Dienst et al.
patent: 5116135 (1992-05-01), Kaiser et al.
patent: 5209937 (1993-05-01), Kangas
patent: 5223345 (1993-06-01), Kaiser et al.
patent: 5352539 (1994-10-01), Psiuk

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