Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds
Patent
1997-03-31
1999-03-16
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Opposed registering coacting female molds
425121, 425183, 425190, 425544, 425588, 425DIG228, 2491141, 249115, 249135, B29C 4502
Patent
active
058826920
ABSTRACT:
A gate portion constituting a gate of a resin molding die is made of a hard alloy having a hardness greater than the predetermined hardness in the iron-based hard alloy used to from a cavity block and a center block. Opposing surfaces of the cavity block halves include a silicone rubber layer at least at the portions thereof which contact portions of the lead frame in a semiconductor encapsulation molding apparatus.
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patent: 5061164 (1991-10-01), Sabado et al.
patent: 5139407 (1992-08-01), Kim et al.
patent: 5252051 (1993-10-01), Miyamoto et al.
patent: 5336272 (1994-08-01), Tsutsumi et al.
patent: 5468141 (1995-11-01), Iwami et al.
Fukasawa Hiroyuki
Hayashi Tsuneyuki
Kojima Akira
Saito Takashi
Hopkins Robert
Sony Corporation
Woo Jay H.
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