Method for extruding plastics

Details Method for extruding plastics Method for extruding plastics

1977-10-27

1979-04-24

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264209, 264349, 366 81, B29F 300, B29F 304, B29F 308

Patent

active

041512421

ABSTRACT:
An annular extrusion die having a rotating shear ring which provides a pumping and shearing action on the plastic as it passes through the die annulus, and a method of forming annular extrusions.

REFERENCES:
patent: 2257067 (1941-09-01), Parsons
patent: 2547151 (1951-04-01), Braeseke
patent: 2937402 (1960-05-01), Pierce
patent: 3276075 (1966-10-01), Harwood
patent: 3387331 (1968-06-01), Billings
patent: 3467743 (1969-09-01), Otani
patent: 3480997 (1969-12-01), List
patent: 3666389 (1972-05-01), Nelson
patent: 3737506 (1973-06-01), Martin et al.
patent: 3979488 (1976-09-01), Greenhalgh et al.

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