Injection molding apparatus

Details Injection molding apparatus Injection molding apparatus

1990-04-06

1991-10-22

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

2643289, B29C 4530

Patent

active

050591134

ABSTRACT:
An injection assembly for the injection molding of plastics and rubbers is disclosed which is comprised of a cylinder, a nozzle mounted at one end portion of the cylinder, a torpedo fitted at its one end to the nozzle and a plunger arranged to reciprocate in the cylinder. The torpedo has a hollow extension extending opposite to the nozzle and protruding in the cylinder, and the plunger is provided therein with an elongate aperture held in slidably movable relation to the extension of the torpedo. Uniform heating of the molding material is attainable at high speed.

REFERENCES:
patent: 3941540 (1976-03-01), Driscoll
patent: 4043726 (1977-08-01), Tsunemoto et al.
patent: 4333608 (1982-06-01), Hendry
patent: 4427361 (1984-01-01), Saito

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