Molding process

Details Molding process Molding process

1980-12-31

1983-05-17

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

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

With means to evacuate mold or provide controlled environment

198472, B29F 100

Patent

active

043838189

ABSTRACT:
In a method of molding a large plastic structure which includes applying a vacuum to draw the molds together, injecting resin into the space between the molds while the vacuum is applied, maintaining the vacuum at least until the resin gels, removing the vacuum, allowing the molded structure to harden, removing the male mold and then removing the molded structure, molding is carried out on a moving production line without danger of disturbing the resin while gelling by disposing the molds on bogies and moving the bogies onto motor driven glide rollers at the point where the resin is injected, and the bogies transported on the glide roller drive until initial gelling has taken place.

REFERENCES:
patent: 2513785 (1950-07-01), Browne
patent: 2524419 (1950-10-01), Billner
patent: 2771619 (1956-11-01), Stewart
patent: 2832995 (1958-05-01), McCaw
patent: 3055058 (1962-09-01), Van Hartesveldt
patent: 4038014 (1977-07-01), Dusza et al.
patent: 4120632 (1978-10-01), Stoeberl
patent: 4179093 (1979-12-01), Western

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