Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent
1993-04-01
1995-03-28
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Female mold type means
249160, 26427217, 4251291, 425556, B29C 4540
Patent
active
054011558
ABSTRACT:
Disclosure is a metal mold for forming a transparent-resin-sealed semiconductor element which, when the molding is removed from it with knock-out pins, will not rub the molding mirror surface of the light transmitting window of the resin package, thus permitting the removal of the molding with the molding mirror surface maintained as it is. In the metal mold for a transparent-resin-sealed semiconductor element which is formed by sealing a semiconductor photo-electric element mounted on a lead frame in a rectangular-parallelepiped-shaped transparent resin package having a light transmitting window on its front end, the cavity surface of the upper die (a cavity block) which corresponds to the light transmitting window has a draft angle .theta. and the surfaces of cavity blocks between which the lead frame is held are perpendicular to the cavity surface, so that, when the molding is released from the metal mold with a knock-out pin, the surface of the light transmitting window is prevented from being rubbed by the metal mold.
REFERENCES:
patent: 5025305 (1991-06-01), Tomisawa et al.
Kawatsu Shigeo
Shikagawa Motokiyo
Fuji Electric & Co., Ltd.
Heitbrink Tim
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