Extruder for rubber materials

Details Extruder for rubber materials Extruder for rubber materials

1987-03-24

1988-02-09

Nozick, Bernard

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

366 80, 366307, A01J 1700

Patent

active

047239018

ABSTRACT:
This disclosure relates to an extruder including a casing which forms a cylindrical bore and a peripheral passage for a heating or cooling medium around the bore. A screw is mounted in the bore and axially fixed to the casing, but adapted to be rotated in the bore. The screw has a thread forming a spiral passage for rubber materials in the bore. A number of projections extend from the casing and into the spiral passage, and the thread is formed with notches for the projections to pass through as the screw rotates. A cylindrical sleeve is mounted within the casing and supports the projections. The casing and the sleeve are divided or split into at least two parts, and lock means is provided on the casing to lock the parts together during operation.

REFERENCES:
patent: 1904884 (1933-04-01), Royle
patent: 3023455 (1962-03-01), Geier et al.
patent: 3458894 (1969-08-01), Wheeler
patent: 4640672 (1987-02-01), Ellwood

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