Die closing unit for injection molding machine

Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold

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4254512, 249 68, 425DIG223, B29F 106

Patent

active

040478718

ABSTRACT:
A push-type die closing unit for injection molding machines in which a stationary die carrier plate, a rearwardly spaced head plate, and four tie rods form a rigid guide structure for a movable die carrier frame to which the piston rod of a linear actuator with power cylinder and auxiliary cylinder is centrally connected, for the direct and cant-free transmission of elevated closing pressures to the die carrier frame and die. The die carrier frame has axially spaced walls joined by four guide sockets and by pressure transfer ribs, a central accessory space defined therebetween accommodating, in conjunction with a hollow forward portion of the piston rod, an ejection device or other accessory device and a hydraulic drive therefor.

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patent: 3346924 (1967-10-01), Lombard
patent: 3433290 (1969-03-01), Eggenberger et al.
patent: 3465387 (1969-09-01), Allard et al.
patent: 3801256 (1974-04-01), Farrell

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