Injection molding machine having a hydraulically operated clampi

Details Injection molding machine having a hydraulically operated clampi Injection molding machine having a hydraulically operated clampi

1997-07-28

1999-06-29

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

264 405, 425149, 425589, B29C 4580

Patent

active

059166029

ABSTRACT:
An electro-mechanical drive apparatus uses a single variable speed motor, two one-way clutches, and a hydraulic accumulator to provide both hydraulic power for the linear motion axes and rotation of the plasticizing screw in an injection molding machine. When engaged, the first one-way clutch couples the drive motor to the pump stack, while the second one-way clutch couples the motor to the feed screw. During rotation of the drive motor in a forward direction; (a) the first one-way clutch engages, rotating the shaft of the hydraulic pump stack to power the machines hydraulic systems and charge the accumulator; and (b) the second one-way clutch slips. When the drive motor is rotated in a reverse direction, (a) the second one-way clutch engages, rotating the feed screw, and (b) the first one-way clutch slips. Preferably, the drive apparatus is associated with a double shaft motor mounted adjacent separate drive couplings for the feed screw and hydraulic pump stack.

REFERENCES:
patent: 5338174 (1994-08-01), Miese
patent: 5645868 (1997-07-01), Reinhart

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