Injection molding valve member actuating mechanism

Details Injection molding valve member actuating mechanism Injection molding valve member actuating mechanism

B - Operations, Transporting

29

C

B29C 45/20 (2006.01) B29C 45/16 (2006.01) B29C 45/28 (2006.01)

Patent

CA 2261367

Valve gated multi-cavity injection molding apparatus. A number of valve pins extend forwardly from a valve pin plate, each in alignment with a gate leading to a cavity in the mold. A pair of cam bars extend beside a pair of actuator bars attached to the valve pin plate. Rectangular slide blocks attached to each actuator bar fit in diagonal grooves in the adjacent cam bar, whereby longitudinal movement of the cam bars moves the valve pin plate and the valve pins forwardly and rearwardly. The cam bars are driven longitudinally by electromechanical or hydraulic actuating mechanism to simultaneously and accurately stop the valve pins in at least three different precise positions during each injection cycle.

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