Injection mold having rotatable stamper holding ring

Details Injection mold having rotatable stamper holding ring Injection mold having rotatable stamper holding ring

1987-11-19

1988-12-13

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

249103, 425195, 4254519, 425810, 264106, B29C 3330

Patent

active

047907380

ABSTRACT:
An injection mold for disc molding such as in the manufacture of video or audio discs. The mold has a stamper removably clamped to one mold half by a rotating stamper holding ring. Both mold halves contain a plurality of clamping pins which selectively engage and hold slots in the holding ring. By rotating the holding ring, disengagement of the ring with the pins of the mold half carrying the stamper occurs simultaneously with engagement of the ring with the pins of the other mold half. Thereby, the stamper is released and may then be replaced.

REFERENCES:
patent: 1916996 (1933-07-01), Somner
patent: 4741689 (1988-05-01), Onizawa et al.

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