Mold for molding disc substrata

Details Mold for molding disc substrata Mold for molding disc substrata

1995-05-11

1997-03-04

Heitbrink, Tim

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

264107, 425192R, 425810, B29C 4500

Patent

active

056077050

ABSTRACT:
A mold for molding digital data discs has interchangeable stampers. An outer peripheral stamper retainer and a mirror block with a convex portion allow interchange without dismounting the mold. The outer stamper peripheral retainer has a plurality of arcuate slots connected or disconnected to a plurality of rods provided with a stationary half-mold and to a corresponding plurality of holder bushings and a mirror block with a convex portion whose diameter fits an inner diameter of the outer stamper peripheral retainer. The outer stamper peripheral retainer and the mirror block correspond in size with a disc to be molded.

REFERENCES:
patent: 4772196 (1988-09-01), Asai
patent: 4790738 (1988-12-01), Shimojo et al.
patent: 5466145 (1995-11-01), Takahashi

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