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
Patent
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.
Asai Ikuo
Shimojo Shunichi
Hamburg C. Bruce
Housel James C.
Jordan Frank J.
Kanesaka Manabu
Meiki Co., Ltd.
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