| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding method for a conveyance vehicle which can enough improve the strength of a grip part without increasing the wall thickness of the grip part or fitting a large rib for reinforcement. SOLUTION: In the injection molding method for the conveyance container 11 having a through hole 14 for a handle in the vicinity of the opening of the container 11 with its upper part opened by using a mold having a resin gate on the container bottom side of the through hole, at least one lateral rib 19 having a semi-circular cross section is formed on the outside surface of a grip part 15 on the container opening side of the through hole, and gas is extracted from a degassing slit formed in the bottom part of a concave channel forming the apex part of the lateral rib. COPYRIGHT: (C)2006,JPO&NCIPI |
