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
1986-02-20
1988-02-23
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, 425150, B29C 4567, B29C 4580
Patent
active
047269200
ABSTRACT:
A method for controlling the opening/closing of a mold in an injection molding machine providing an increased accuracy. A changeover position indicative of a speed of a movable plate or the changeover position of a pressure is preset in accordance with a corresponding position of the movable plate. The value thus set is arithmetically converted to a corresponding displacement distance of a rod of a mold-clamping cylinder. The converted value is compared with the detected displacement of the rod, and when the two values coincide, the hydraulic pressure controlling the mold is changed appropriately.
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patent: 4345890 (1982-08-01), Hemmi et al.
patent: 4377377 (1983-03-01), Arends et al.
patent: 4473345 (1984-09-01), McDowall
Bartholomew James
Silbaugh Jan H.
The Japan Steel Works Ltd.
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