| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection-molding die which has a valve pin guide leveled precisely and a valve pin capable of being inserted back/forth in a gate bush without leakage of a thermally pressurized thermoplastic resin and almost free from a trouble during operation. SOLUTION: This hot runner-type injection-molding die is structured such that a cavity-side part has a hot runner block with an internally formed resin passage and the gate bush with an internally formed resin passage communicating with the described resin passage is fitted in a direction where a movable part moves. The inner resin passage of the gate bush has an internally fitted valve pin, and the valve pin is connected, in a freely advancing/receding manner, to the hot runner block or a cylinder mounted at the cavity-side part so as to open/close the gate of the gate bush, and introduced, in a freely sliding manner, through the through hole of the valve pin guide fixed by screwing it into the hot runner block. COPYRIGHT: (C)2004,JPO
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