Displacement and/or actuating force drive device for an injection molding machine
AssigneeBattenfeld GmbH
InventorsManfred Miese, Johann Holzschuh
Life of this patent
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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.
Claims5
A drive device for an injection molding machine for actuating a closing unit of said injection molding machine, said drive device comprising:
- a hydraulic stroke unit comprising a short stroke piston-cylinder unit;
- a mechanical stroke spindle system arranged in tandem with said hydraulic stroke unit;
- an electromotor for driving said stroke spindle system;
- a yoke displaceable along a straight line by said spindle stroke system and acted upon by said hydraulic stroke unit which is located inside said yoke;
- a position regulator for controlling operation of said electromotor in accordance with a position of said yoke along said straight line;
- and
- a servo valve of a pressure regulation circuit for controlling said hydraulic stroke unit in accordance with a closing pressure between halves of the injection mold.
Dependencies are inferred from the claim text.