Apparatus for extruding plastic materials

Details Apparatus for extruding plastic materials Apparatus for extruding plastic materials

1989-07-28

1991-02-26

Housel, James C.

Plastic article or earthenware shaping or treating: apparatus

With safety feature

Means to alter operation due to presence of foreign matter...

264 33, 425136, 425146, 425149, 425188, 425190, 4253761, 425DIG15, C06B 2100, B29C 4796

Patent

active

049958020

ABSTRACT:
An apparatus for extruding plastic materials, particularly plastic explosives or propellants, has a casing, at least one pressing member moving therein, e.g. a rotating extruder screw and a shaping retainer plate terminating the casing at the outlet side, which is fixed to the casing and can be raised therefrom if an excessive overpressure occurs. So as to ensure rapid raising and a rapid release of the overpressure when a safety hazard occurs, the retainer plate is fixed to the casing by a mechanical or a gas pressure spring, whose spring tension is adjustable. It is also possible to provide a hydraulic pressure directed in opposition to the spring and by which the retainer plate can be raised in random manner from the casing.

REFERENCES:
patent: 869307 (1907-10-01), Jones
patent: 4124346 (1978-11-01), Greenwood et al.
patent: 4619599 (1986-10-01), Herbert et al.
patent: 4652224 (1987-03-01), Golisch
patent: 4685875 (1987-08-01), Chevroulet et al.
"Hydraulic and Pneumatic Power and Control", edited by F. D. Yeaple, 1966, cGraw-Hill, N.Y., pp. 271, 284-287.

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