| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding die allowing work to be performed very efficiently in taking out a runner molding for a color change or the like of a molding as an insulated type injection molding die and reducing a maintenance cost without a risk of causing the damage and deformation of a torpedo tip part. SOLUTION: A die body 1 of a fixed side die F is provided with a sprue S2 extending from a runner R to a gate G of a cavity C. The gate G is formed as an open gate which is normally open. The sprue S2 comprises a non-heating part S2a on the runner R side, and a heating part S2b by a heater 4 on the gate G side. When a mounting plate 2 and the die body 1 are separated after injection molding, solidified resin Ro in the non-heating part S2a of the sprue S2 is separated from melted resin Re in the heating part S2b and detached from the die body 1 integrally with the runner molding RM. COPYRIGHT: (C)2009,JPO&INPIT
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