Injection molding halves for disks

Details Injection molding halves for disks Injection molding halves for disks

1988-11-16

1990-11-20

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Plural mold cavities

2643288, 425589, 425595, 425810, B29C 4532

Patent

active

049715488

ABSTRACT:
Injection molding halves for forming disks having a plurality of cavities between a stationary mold unit, in which a plurality of sprue bushings and a runner with gates for introducing molten resin into said plurality of cavities are provided, and a movable mold unit in which a plurality of punches are provided concentrically to the sprue bushings for severing a central aperture of the molded disk, and an interval mechanism for providing a predetermined interval between a stationary mold unit and stationary mold base plate to ease the removal of escaped material, and connecting structure for connecting the stationary mold unit and the stationary mold base plate by alternative rotating of a connecting rod.

REFERENCES:
patent: 3315302 (1967-04-01), Phillipson
patent: 4737096 (1988-04-01), Poorten
patent: 4786246 (1988-11-01), Gellert

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