Disk substrate injection mold

Details Disk substrate injection mold Disk substrate injection mold

1998-12-23

2000-12-26

Davis, Robert

Plastic article or earthenware shaping or treating: apparatus

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

With product ejector

425810, 425437, B29C 4543

Patent

active

061649554

ABSTRACT:
A disk substrate injection molding mold comprises a stationary mold half, a movable mold half capable of mated engagement with the stationary mold half and having, on a side thereof confronting the stationary mold half, a cavity for being filled with a molten material for molding a disk substrate, at least one air nozzle for blowing out into the cavity air fed through the movable mold half for peeling the molded disk substrate off the cavity, and a valve mechanism disposed between the stationary mold half and the movable mold half for selection-controlling on/off of the feed of air to the air nozzle. Since the valve mechanism is built in the mold, the volume of the flow passage from the valve mechanism to the air nozzle becomes small. As a result, the molded disk substrate is peeled off from the cavity immediately an air blow signal is sent out, thus improving the response capability of the mold. Further, because the volume of the flow passage is small, uneven peeling can be avoided, thereby improving the quality of the molded article.

REFERENCES:
patent: 4531703 (1985-07-01), Underwood
patent: 4961884 (1990-10-01), Watanabe et al.
patent: 5326240 (1994-07-01), Kudo et al.
patent: 5720994 (1998-02-01), Asai
patent: 5804229 (1998-09-01), Asai

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