Stamper plate mounting device of an injection mold for making an

Details Stamper plate mounting device of an injection mold for making an Stamper plate mounting device of an injection mold for making an

1996-08-28

1998-08-25

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With direct application of magnetic force to manipulate...

425193, 425810, 425DIG33, B29C 4517

Patent

active

057981221

ABSTRACT:
A stamper plate mounting device for an injection mold for making an optical disc substrate. A stamper plate is detachably supported in a cavity hollow which is formed between a cavity side disc cavity plate and a movable disc cavity plate of the injection mold for making an optical disc substrate. A central hole is provided at the center of the disc cavity. The stamper plate mounting device has (1) means for holding the inner circumference of the stamper plate which has, on one end thereof, a flange for holding the inner circumference of the stamper plate and which is precisely fitted in the central hole from the other end thereof, and (2) permanent magnet which is buried in the bottom surface of the central hole or in the other end of the means for holding the inner circumference of the stamper plate and which has a magnetic pole in the axial direction.

REFERENCES:
patent: 4737096 (1988-04-01), Poorten
patent: 4907956 (1990-03-01), Ezaki et al.
patent: 5049053 (1991-09-01), Tabaru
patent: 5087184 (1992-02-01), Watanabe et al.
patent: 5326240 (1994-07-01), Kudo et al.
patent: 5427520 (1995-06-01), Shimizu et al.
patent: 5593710 (1997-01-01), Asai

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