Process for clamping, sealing, and aiding the filling of matched

Details Process for clamping, sealing, and aiding the filling of matched Process for clamping, sealing, and aiding the filling of matched

1978-04-12

1979-08-21

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including use of vacuum

264102, 264328, 264DIG78, 269 21, 4254519, B29F 100

Patent

active

041653580

ABSTRACT:
A technique and process for clamping, sealing and aiding in the filling of fiberglass or other types of matched low pressure molds. An air-impervious bag is placed about the male and female molds and is sealed. A vacuum is then produced within the bag in such a manner as to fix the molds firmly together while sealing the mold parting line and whereupon a predetermined amount of molding material is injected within the mold cavity.

REFERENCES:
patent: 1909444 (1933-05-01), Worrall
patent: 2054864 (1936-09-01), Owen
patent: 2331296 (1943-10-01), Bendix
patent: 2923978 (1960-02-01), Corzine
patent: 2969299 (1961-01-01), Fullerton
patent: 3666600 (1972-05-01), Yoshino
patent: 3787546 (1974-01-01), Prah

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