Transfer mold design

Details Transfer mold design Transfer mold design

1994-06-21

1997-04-29

Davis, Robert

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Opposed registering coacting female molds

26427217, 26432812, 425117, 425544, 425572, 425573, 425588, B29C 4527, B29C 4502

Patent

active

056246919

ABSTRACT:
The invention is to a transfer mold design utilized with conventional transfer encapsulation. The design utilizes a varying runner cross section with an intermediate varying depth well or reservoir from which a constant gate depth and gate entry angled to the mold cavities is employed. The method and apparatus of the invention is applicable to single and multiplunger molding utilizing thermoset and thermoplastic encapsulants for semiconductors.

REFERENCES:
patent: 4126292 (1978-11-01), Saeki et al.
patent: 5071334 (1991-12-01), Obara

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