Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1986-08-21
1988-04-05
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264 401, 2643281, 425149, 425214, 425542, 425555, B29C 4503
Patent
active
047357606
ABSTRACT:
In an injection molding machine which injects molten metal into a metal mold cavity by an injection step and a succeeding pressure holding step, the injection step is controlled by the steps of filling the molten resin into the metal mold cavity at a high speed during the filling step; switching the injection operation from the filling step to the pressure holding step; concurrently operating braking means for applying a braking force to the plunger of the injection molding machine for stopping the plunger; and locking the braking means for continuously applying a constant force to the plunger until a gate seal of the metal mold cavity is completed.
REFERENCES:
patent: 3920367 (1975-11-01), Ma et al.
patent: 3932083 (1976-01-01), Boettner
patent: 4060362 (1977-11-01), Wilson, III
patent: 4407649 (1983-10-01), Saito
Fertig Mary Lynn
Silbaugh Jan H.
Toshiba Kikai Kabushiki Kaisha
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