Molding apparatus for producing synthetic resin molded product

Details Molding apparatus for producing synthetic resin molded product Molding apparatus for producing synthetic resin molded product

1994-04-28

1997-03-18

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

26432812, 26432813, 264572, 425546, 425812, B29C 4500, B29C 4906

Patent

active

056120672

ABSTRACT:
A molding apparatus for producing a synthetic resin molded product including a forming mold with a molding cavity, a gate communicating with the cavity, and an overflow chamber communicating with the cavity through a flow-out passage, a gas blow-in mechanism for blowing gas into molten synthetic resin which has been injected into the cavity through the gate so as to form a void in the molten synthetic resin in the cavity to mold a hollow product and a flow-out passage opening and closing mechanism for closing the flow-out passage until the molten resin fills the molding cavity and opening the flow-out passage when the gas blow-in mechanism is in operation.

REFERENCES:
patent: 5069858 (1991-12-01), Hendry
patent: 5090886 (1992-02-01), Jaroschek
patent: 5098637 (1992-03-01), Hendry
patent: 5127814 (1992-07-01), Johnson et al.
patent: 5137680 (1992-08-01), Hendry
patent: 5162122 (1992-11-01), Loren
patent: 5162230 (1992-11-01), Ziegler et al.
patent: 5198177 (1993-03-01), Sugiyama et al.
patent: 5204050 (1993-04-01), Loren
patent: 5250238 (1993-10-01), Kiefer et al.

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