Air knockout for plastic molds

Details Air knockout for plastic molds Air knockout for plastic molds

1993-06-09

1994-11-29

Bushey, Charles S.

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

264335, 425437, 425444, 425DIG102, B29C 4542

Patent

active

053684680

ABSTRACT:
An air-operated knockout device for plastic molds for assisting ejection of molded plastic parts from a mold. The knockout device has a body in which is installed a knockout pin. The knockout pin is normally retained within the body, but can be axially shifted to an extended position to physically eject a molded part from a mold. The knockout pin also includes an air bypass to assist the knockout pin in the ejection of the molded part.

REFERENCES:
patent: 3838960 (1974-10-01), Lovejoy
patent: 4375948 (1983-03-01), Von Holdt
patent: 4531703 (1985-07-01), Underwood
patent: 4653997 (1987-03-01), Sheffield et al.
patent: 4755128 (1988-07-01), Alexander et al.
patent: 4981430 (1991-01-01), Zimmerman, Jr.

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