Spring plunger

Details Spring plunger Spring plunger

1990-03-20

1992-05-19

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

264335, 425577, 425DIG127, B29C 4540

Patent

active

051143348

ABSTRACT:
A spring member for use in a plastic mold for separating and cushioning parts of the mold, and returning ejector assemblies. The spring member is composed of a hollow cylindrical body with a spring-biased plunger extending a short distance from one end. The spring member is shaped to be installed within a bore in a surface in a mold, with only the plunger extending above the mold surface.

REFERENCES:
patent: 3950119 (1976-04-01), Reichenbach
patent: 4428725 (1984-01-01), Babiol
Polentz, Hydraulic and Pneumatic Power and Control, "Saving Space with the Liquid Spring", 1966, p. 268.

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