Method of controlling the afterpressure variation with time of a

Details Method of controlling the afterpressure variation with time of a Method of controlling the afterpressure variation with time of a

1990-01-05

1991-01-08

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

264 406, 364476, 425145, 425149, 425159, 425166, B29C 4577

Patent

active

049833367

ABSTRACT:
A method controlling the afterpressure variation with time of an injection-moulding machine. A process computer controlling a hydraulic pressure drive of the injection-moulding machine stores a given reference afterpressure variation with time. Upon a variation of the moulding mass temperature Tm and/or of the tool temperature Tf, a new afterpressure variation with time is calculated. The time data samples corresponding to the reference temperature values and the reference afterpressure values, respectively, are then determined.

REFERENCES:
patent: 4695237 (1987-09-01), Inaba

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