To provide a vehicle bumper and a molding method thereof capable of thinning a thickness and reducing weight by suppressing the generation of a weld line caused by injection molding.
The vehicle bumper includes a molding fitting groove 4 over the bumper side 3 from the bumper center 2, and its groove bottom is formed with a fastening hole 5 for pressing in and fitting a clip 7 of a side molding 6. In the injection molding of a rear bumper 1, a plate thickness Tc of the bumper center 2 in which gates G1-G3 are concentrated is reduced, and the generation of the weld line can be suppressed by increasing a meeting angle of a molten resin around a movable core of forming the fastening hole 5 by molding in the different plate thickness distribution of increasing a plate thickness Ts of the bumper side 3.
| JP4386238 | How to make a stay |
WAKAMATSU KAZUNORI
TAKATSU RYOICHI
SEKIGUCHI ATSUSHI
SHIMIZU MASAYOSHI
NAKAGAKI HITOSHI
ASHIDA TAKASHI
KAMAE KOSUKE
OTSUBO TAKENOBU
| JPH09131761A | 1997-05-20 | |||
| JPS6198650A | 1986-05-16 | |||
| JPS63233814A | 1988-09-29 |