| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve gate system which can keep the engagement between a valve pin and a valve gate in an ideal state. SOLUTION: The valve gate system for a mold in which a molten resin is packed in a cavity 11 formed in the mold through the valve gate 2 has the valve pin 1 engaged with the valve gate 2, a cylinder 5 for moving the valve pin 1 between a position engaged with the valve gate 2 and a position for opening the valve gate, and a motor 19 for rotating the valve pin. While the valve pin is rotated by the motor 19, the valve pin is moved by the cylinder 5 to be engaged with the valve gate.
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