Process for producing a bumper for a vehicle

Details Process for producing a bumper for a vehicle Process for producing a bumper for a vehicle

1996-11-01

2000-05-30

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

2643288, 425130, 293120, B29C 4516, B60R 1903

Patent

active

060688076

ABSTRACT:
A process for producing a bumper for a vehicle uses a first step of injecting an outer layer forming material into a bumper forming cavity through a gate in a mold, and a second step of injecting a core forming material, thereby allowing the core forming material to flow into the outer layer forming material existing in said gate and said cavity, while allowing the outer layer and core forming materials to flow within the cavity. In the mold, the volume of a mounting portion forming area of the bumper forming cavity is set so that the thickness t.sub.1 of at least a mounting portion of the bumper for mounting to a vehicle body to extend laterally from a central portion of the vehicle body can be larger than the thickness t.sub.2 of a bumper main portion excluding the mounting portion, and the gate opens into the mounting portion forming area. Thus, the outer layer forming material can be allowed to flow substantially uniformly over the entire cavity, thereby enhancing the filling rate of the core forming material.

REFERENCES:
patent: 3878282 (1975-04-01), Bonis et al.
patent: 4120922 (1978-10-01), Lemelson
patent: 4366110 (1982-12-01), Morita et al.
patent: 4550043 (1985-10-01), Beck
patent: 5059361 (1991-10-01), Da Re'264 25

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