Injection molding method using a plurality of control parameters

Details Injection molding method using a plurality of control parameters Injection molding method using a plurality of control parameters

1993-04-29

1994-09-13

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 405, 425145, 425149, 425150, B29C 4576

Patent

active

053466578

ABSTRACT:
An injection molding method using an injection molding machine in which a plurality of control parameters including the injection speed, injection pressure and the mold opening degree are controlled, from a moment immediately before filling up of the mold cavity with the resin, setting the parameters in an order determined in accordance with the characteristics demanded by the resin, such that, when the injection pressure is controlled as a commanding parameter, the injection speed is controlled as a subordinate parameter under a given restriction and, when the mold opening degree is controlled as the commanding parameter, the injection pressure is controlled as a subordinate parameter under a given restriction. According to this method, it is possible to control the injection molding operation on the basis of a plurality of control parameters in accordance with characteristics demanded by the resin in the mold which varies time to time, thus making it possible to maximize the packing degree while minimizing burrs and short shot.

REFERENCES:
patent: 3976415 (1976-08-01), Hauser et al.
patent: 4325896 (1982-04-01), Rodgers, Jr.
patent: 4767300 (1988-08-01), Buja et al.
patent: 5057255 (1991-10-01), Sato et al.
patent: 5059364 (1991-10-01), Okubo et al.

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