Clamping unit and method for an injection molding machine

Details Clamping unit and method for an injection molding machine Clamping unit and method for an injection molding machine

1993-07-06

1994-12-06

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With product ejector

4254516, 425593, 425595, B29C 4564

Patent

active

053705246

ABSTRACT:
A clamping unit and method thereof, in which a servo-motor mounted on a rear platen is used for driving two ball screws with pre-load hydraulic cylinders so as to actuate the outward-bending toggle mechanism to provide mold-opening and mold-clamping functions; by using a limited space, a servo-motor mounted on the movable platen is used for driving a nut to turn so as to cause the screw and the ejector bar to be moved back and forth; finally, an electric motor on the rear platen will drive a mold-adjusting mechanism, and a servo-motor mounted on the platen is also operated so as to complete the mold adjustment quickly and automatically.

REFERENCES:
patent: 3418692 (1968-12-01), Valyi
patent: 4869659 (1989-09-01), Sakai et al.
patent: 4938682 (1990-07-01), Kadoriku et al.
patent: 5052908 (1991-10-01), Inaba et al.
patent: 5102327 (1992-04-01), Reinhart
patent: 5176923 (1993-01-01), Ito

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