Mold clamping equilization system

Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With coupling between charger and mold

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Details

2642972, 2643288, 425572, 425589, 425595, B29C 4566

Patent

active

050449273

ABSTRACT:
Injection molding machines for making plastic articles having a stack mold arrangement frequently suffer from the problem of unbalanced forces. Various novel techniques for counteracting and/or avoiding the production of these forces are disclosed. These techniques include the use of latches to lock an injection nozzle to a sprue bar, the use of shutters to lock the sprue bar to a stationary platen, the use of a force compensator in a moving stack mold half, and the use of an injection nozzle axially offset from the sprue bar.

REFERENCES:
patent: 3417433 (1968-12-01), Teraoka
patent: 4586887 (1986-05-01), Gellert
patent: 4753592 (1988-06-01), Kaaden
patent: 4867938 (1989-09-01), Schad et al.

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