Mold for disk substrate

Details Mold for disk substrate Mold for disk substrate

1996-08-02

1998-04-14

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

425577, 425536R, 425436RM, 425444, 425810, 264107, B29C 4538, B29C 4540

Patent

active

057388865

ABSTRACT:
A mold for molding a substrate of a disk, including a stationary and a movable mold half which are movable relatively to each other, a positioning ring portion on the movable mold half, for positioning an annular stamper at its center hole, and an ejector sleeve located radially inwardly of the positioning ring portion and movable to remove the substrate from the movable mold half. The ejector sleeve includes a recessing end portion which extends in an axial direction thereof beyond an end face of the positioning ring portion into the mold cavity when the stationary and movable mold halves are placed in the closed position. The recessing end portion has an outer circumferential surface which is perpendicular to the end face of the positioning ring portion, so that an annular recess partly defined by a circumferential shoulder surface is formed by the recessing end portion of the ejector sleeve. The circumferential shoulder surface is formed by the outer circumferential surface of the recessing end portion.

REFERENCES:
patent: 4737096 (1988-04-01), Poorten
patent: 4961884 (1990-10-01), Watanabe et al.
patent: 5460763 (1995-10-01), Asai
patent: 5545365 (1996-08-01), Asai
patent: 5552098 (1996-09-01), Kudo et al.
patent: 5593710 (1997-01-01), Asai
patent: 5607705 (1997-03-01), Asai

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