Mechanical locking mechanism for injection mold

Details Mechanical locking mechanism for injection mold Mechanical locking mechanism for injection mold

1991-05-02

1992-05-19

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

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

Mold having movable core or movable pin

425595, 425DIG5, B29C 4564

Patent

active

051143356

ABSTRACT:
A mechanical locking mechanism for an injection mold is disclosed for holding a core rod in place in the mold cavity to resist movement caused by the injection molding pressures. The locking mechanism includes a pair of cam shafts, one carried by each of the mold halves, having a cam engagable with a concave recess in the core rod. When the mold halves are closed upon the core rod, the cams engage a portion of the recess surfaces facing toward the mold cavity. The cam shafts are subsequently rotated to move the cams to a second portion of the recess surfaces which is facing away from the mold cavity whereby the cams resist movement of the core rod away from the injection mold cavity.

REFERENCES:
patent: 2363107 (1941-07-01), Young
patent: 4184835 (1980-01-01), Talbot
patent: 4737093 (1988-04-01), Hori et al.

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