Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Patent
1996-01-25
1998-04-28
Cariaso, Alan
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
362 61, 362373, F21V 2900
Patent
active
057436304
ABSTRACT:
A method for molding a lamp body of vehicular lamps formed of synthetic resin which includes steps of forming a lamp body by synthetic resin which is provided with an air communication hole, a surrounding wall formed at a position where the air communication hole is surrounded thereby, and a cover member for covering a rear portion of the air communication hole, forming a recess on one surface of the surrounding wall to provide a thin hinge section to form the cover member integrally with the lamp body, bending down the cover member at the recess while facing outside to thereby define a communication passage connecting to the air communication hole cooperatively with the surrounding wall, providing a mold core for molding the cover member to extend in the core sliding direction, which mold core is constituted by a first block positioning at the side of the cover member where the recess is formed and a second block positioning at the opposite side thereof, retracting first, when the lamp body is retracted from the mold after the injection-molding process, the second block positioning at the side of the cover member where the recess is not formed, and then retracting the first block positioning at the side of the cover member where the recess is formed while bending the cover member at the hinge section.
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Yamashita Masakazu
Yanagihara Hirokazu
Cariaso Alan
Koito Manufacturing Co. Ltd.
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