MOLD

摘要

PROBLEM TO BE SOLVED: To make a molding cycle rapid by enhancing the cooling efficiency of a resin cooling means. SOLUTION: A molten resin is supplied into the cavity 5 formed between a fixed mold 1 and a movable mold 2 from a sprue 24 through a first runner 25 and a hot nozzle 26. The resin outlet 26A of the hot nozzle 26 is allowed to be spaced apart from the cavity 5 and a second runner 33 is formed between them. A cooling liquid passage 34 positioned so as to surround the second runner 33 is formed and fins 62 being heat exchange projected parts are provided to the cooling liquid passage 34. Even if a pin or the like for opening and closing the resin outlet 26A of the hot nozzle 26 is not provided, the edge cutting of the molten resin can be performed. Cooling efficiency is enhanced by providing the fins 62 being the heat exchange projected parts to the cooling liquid passage 34 to make the molding cycle rapid.