Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds
Patent
1996-12-18
1998-11-10
Nguyen, Khanh P.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Opposed registering coacting female molds
425135, 4251291, 425544, 425546, 425420, 425812, 425DIG228, 249141, B29C 4502, B29C 4563
Patent
active
058340351
ABSTRACT:
In an apparatus for molding resin to seal electronic parts, an internal die space defined at least by pots, cull portions, resin passages and cavities when an upper mold section and a lower mold section are closed, is cut off or sealed from the exterior atmosphere. Thereupon the die space is evacuated using a first evacuation by a vacuum source and a second or instantaneous evacuation by an instantaneous evacuation mechanism. The vacuum source for the first evacuation may be an active vacuum pump, while the instantaneous evacuation mechanism may be a vacuum tank that has been previously pumped down, for example. Using this apparatus, it is possible to quickly improve the degree of vacuum in the internal die space by efficiently and reliably discharging air, moisture and gas from the internal die space to the exterior due to a synergistic action of the evacuation and the instantaneous evacuation. Consequently, the formation of voids in resin molded members is prevented.
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Analysis of Epoxy Resin by TG/GCMS system (I); Shimadzu Application News.
Araki Koichi
Kawamoto Yoshihisa
Matsuo Makoto
Osada Michio
Fasse W. F.
Fasse W. G.
Nguyen Khanh P.
Towa Corporation
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