Reinforced resin molding method and apparatus

Details Reinforced resin molding method and apparatus Reinforced resin molding method and apparatus

1979-10-22

1981-05-12

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264102, 264316, 264511, 264552, 264553, 264571, 425338, B29D 904

Patent

active

042671426

ABSTRACT:
The specification discloses an apparatus and method for molding glass fiber reinforced polyester resin articles. A bladder-covered male mold is in turn covered with resin and reinforcement and a female mold with a surface forming film located therein or with a smooth surface is then closed over the male mold. With the bladder held against the male mold by vacuum, air is evacuated from between the bladder and the female mold. The vacuum between the bladder and the male mold is then released whereby the bladder is forced against the resin to thereby force it against the film which is located within the female mold or against the mold surface. This insures a molded article with a bubble free surface. Where a film is used, this insures a tight air free bond between the resin and the film.

REFERENCES:
patent: 2794756 (1957-06-01), Leverenz
patent: 3140325 (1964-07-01), Graff
patent: 3467741 (1969-09-01), Kesling
patent: 3982877 (1976-09-01), Wyeth et al.

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