Displacement and/or actuating force drive device for an injection molding machine
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United States of America Patent
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-
Aug 16, 1994
Grant Date -
N/A
app pub date -
Apr 10, 1992
filing date -
Apr 10, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A displacement and/or actuating force drive device for an injection molding machine, for example, for actuation of the push-type screw of a plasticizing extruder or the closing unit of an injection mold, comprises generally a hydraulic stroke drive, in tandem in rows or in series with a mechanical stroke spindle system driven by a brushless three-phase servomotor type electromotor. The motor is associated with a positioning regulation device dependent upon the closing and opening position of the injection mold. The hydraulic stroke drive can be actuated from a pressure regulation circuit by a servo valve. The circuit depends upon the closing force between the two mold halves of the injection mold.
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