MOLD FOR MOLDING HOLLOW MEMBER AND HOLLOW MEMBER PRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To omit a process removing residue within a mold to shorten a molding cycle to enhance productivity. SOLUTION: A mold is used in order to obtain a hollow molded product by injecting a molten resin into the molding cavity 31 demarcated by the fixed mold 17 and movable mold 18 constituting a mold 19 from the nozzle of one injection machine to mold two split members and abutting these split members mutually to inject a molten resin into the welding cavity supprounding the outer peripheral edges of the abutted parts of them to mutually weld the abutted parts. A molding runner 64 allowing a molten resin for molding the split members to flow and a welding runner 65 allowing a molten resin for mutually welding the split members to flow are respectively branched from the nozzle to be provided in the fixed mold and the gate 66a communicating with the molding cavity is provided to the outlet of the molding runner and the gate communicating with the welding cavity is provided to the outlet of the welding runner.