Method for injection molding

Details Method for injection molding Method for injection molding

1990-05-21

1992-03-17

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

With internal application of fluid pressure

55 97, 2643288, 26432813, 26432814, 425812, B29C 4534, B29C 4572, B29D 2200

Patent

active

050966553

ABSTRACT:
A process for producing an injection molded product includes the step of introducing an amount of a molten thermoplastic sufficient for the preparation of the injection molded product into a mold cavity. A quantity of heated gas is introduced into the mold cavity, the molten thermoplastic in the mold cavity thereby forming a gas cavity in the molten thermoplastic. The heated gas is then vented from the gas cavity and a cooling gas is introduced into the gas cavity. The injection molded product is cooled and then the cooling gas is vented from the gas cavity.

REFERENCES:
patent: 4140672 (1979-02-01), Kataoka
patent: 4830812 (1989-05-01), Kauer
patent: 4942006 (1990-07-01), Loren

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