| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a valve gate of a mold for injection molding capable of preventing an undesired protrusion shape at a gate irrespective of a type of a resin material. SOLUTION: The structure of the valve gate of the mold for injection molding comprises a valve pin 6 for opening/closing the valve gate 4 in such a manner that a distal end part for molding a part of the molding of the pin 6 is formed in a conical surface shape or a spherical surface shape in a direction for projecting to a cavity side.
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