To suppress the occurrence of a weld even when a molten resin material flows in from two directions when performing injection molding by a multi-point gate method, and to make the weld inconspicuous even when the occurrence thereof is unavoidable.
A mole groove M is provided extending in a bumper side part Sb of a bumper fascia Bf. A plurality of engaging grooves H as openings are intermittently or discontinuously formed at the bottom of the mole groove M. When molding the bumper side part Sb, the molten resin material is fed to a terminal of the mole groove M by inflow of the molten resin material from an arrow D direction. Thereafter, the molten resin material is made to flow in from a side gate 21. The occurrence of a weld is suppressed in the mole groove M or in its vicinity.
SEKIGUCHI ATSUSHI
SHIMIZU MASAYOSHI
| JP2003103594A | 2003-04-09 | |||
| JP2009298055A | 2009-12-24 | |||
| JPH06285911A | 1994-10-11 | |||
| JPS6198650A | 1986-05-16 | |||
| JP2006021520A | 2006-01-26 |
Tomioka Kiyoshi
Tsuyoshi Hashimoto