Motor control device for electric injection molding machine

Details Motor control device for electric injection molding machine Motor control device for electric injection molding machine

1989-07-11

1990-08-21

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Molding pressure control means responsive to pressure at...

264 403, 425170, 425589, B29C 4577

Patent

active

049501461

ABSTRACT:
A motor control device for an electric injection molding machine. The injection molding machine has a screw rotating mechanism including a rotary shaft associated with one end of a resin feeding screw received in a heating cylinder, a holding member rotatably holding said rotary shaft and slidable in the axial direction of said rotary shaft, and a first motor for driving said screw through said rotary shaft. The injection molding machine also includes a second motor for producing a force for advancing said screw in the injecting direction and retracting said screw, a screw shaft and a nut for converting the output torque of said second motor into linear movement, and a sliding member to which said nut is fixed. The motor control device includes a load detecting member fixed at one end to said holding member and at the other end to said sliding member, and a controller for controlling the operation of the first and second motors in accordance with the level of load detected by the load detecting member.

REFERENCES:
patent: 4540359 (1985-09-01), Yamazaki
patent: 4579515 (1986-04-01), Kamaguchi et al.
patent: 4758391 (1988-07-01), Shimizu et al.

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