Compression molding method and mold clamping apparatus

Details Compression molding method and mold clamping apparatus Compression molding method and mold clamping apparatus

2006-02-21

2006-02-21

Colaianni, Michael P. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

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

C264S040100, C425S149000, C425S150000, C425S450100, C425S595000

Reexamination Certificate

active

07001545

ABSTRACT:
Disclosed is a compression molding method comprising the steps of: calculating an average value of mold clamping forces sensed in a plurality of mold clamping mechanisms for clamping a stationary and a movable mold half; obtaining a first control signal on the basis of deviation between a preset target mold clamping force and an average value of sensed mold clamping forces; sensing positions of movable members of the mold clamping mechanisms; obtaining an average value of sensed positions; setting the average value as a successive target position; obtaining a second control signal on the basis of deviation between each of the sensed positions and the successive target position; and obtaining a clamping control signal for each of the clamping mechanisms by adding the first control signal and the second control signal. An apparatus suitable for implementing the method is also disclosed.

REFERENCES:
patent: 6013211 (2000-01-01), Seki
patent: 6157158 (2000-12-01), Ishikawa
patent: 6840115 (2005-01-01), Ishikawa
patent: A 5-269750 (1993-10-01), None
patent: A 11-179770 (1999-07-01), None

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