Apparatus for injection molding information recording disks

Details Apparatus for injection molding information recording disks Apparatus for injection molding information recording disks

1988-12-07

1991-04-09

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

264106, 264335, 425437, 425577, 425810, B29C 4543

Patent

active

050060589

ABSTRACT:
An apparatus for injection molding a substrate of an information recording disk in which melted molding material is injected into a mold space after a pair of mold bodies are clamped together. An uneven surface area is provided between a cutting device for cutting the cured molding material at the molding surface and an aperture for supplying the pressurized gas for causing the cured molding material to be released. The flow of pressurized gas through the cut portion of the cured molding material is prevented and force is generated by the pressurized gas causing the cured molding material and a stamper forming the molding surface to release uniformly from the mold.

REFERENCES:
patent: 4500486 (1985-02-01), Rascle et al.

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