Automobile bumper and injection mold for forming such automobile

Details Automobile bumper and injection mold for forming such automobile Automobile bumper and injection mold for forming such automobile

1993-11-02

1995-06-13

Nguyen, Khanh

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With coupling between charger and mold

425567, 26432812, B29C 4527

Patent

active

054236738

ABSTRACT:
All injection mold for forming an automobile bumper for use on an automobile body has a first cavity region defining a thicker region having a relatively large wall thickness, a second cavity region defining a gradually varying region having a gradually varying wall thickness, a third cavity region defining a thinner region having a relatively small wall thickness and a film gate for successively introducing a molding resin into the first, second and third cavity regions. The thicker region, the gradually varying region, and the thinner region are integrally formed with each other and arranged successively downwardly when mounted on the automobile body. The gradually varying region has a wall thickness reduced at a constant rate from the wall thickness of the thicker region to the wall thickness of the thinner region in a direction from the thicker region toward the thinner region.

REFERENCES:
patent: 4531704 (1985-07-01), Matthei
patent: 4790992 (1988-12-01), Nishikawa

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