Method for molding plastic articles

Details Method for molding plastic articles Method for molding plastic articles

1978-07-13

1980-06-03

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264538, 264328, B29D 2302

Patent

active

042061687

ABSTRACT:
A method and apparatus are disclosed for molding plastic articles, wherein the method includes the steps of filling a mold cavity at a first station with heated flowable plastic material under relatively low pressure from a first pressure source and then displacing the mold to a second station where the plastic material is cooled under pressure from a second pressure source. During the displacing step, the mold is conveyed along an arcuate path and the mold orientation is maintained. The apparatus includes a cantilevered core pin concentrically positioned in the mold cavity and a set of radially biased neck rings which preferably open automatically under a constant biasing force to release the neck of a molded article after the core pin is withdrawn from the article.

REFERENCES:
patent: 3172929 (1965-03-01), Santelli
patent: 3941539 (1976-03-01), Saumsiegle et al.
patent: 4147748 (1979-04-01), Saumsiegle

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