| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve gate device capable of also ensuring the temperature at the forward end side of a valve casing. SOLUTION: A valve pin 26 for opening/closing a gate 11 is provided in the valve casing 16 so as to be freely movable in its axial direction. A band heater 31 is installed on the external periphery of the valve casing 16. A heater cover 32 is mounted on the external periphery of the band heater 31. A positioning member 36 which is provided on the external periphery on the forward end side of the valve casing 16 and interposed between an incorporation hole 13 and the casing 16 is formed of a highly heat-conductive material. A heat conductive path 38 extending from the forward end surface 32b of the band heater 31 to the forward end side of the valve casing 16 is formed. Thus, the heat of the forward end surface 31b of the band heater 31 can be conducted to the forward end side of the valve casing 16 through the heat conductive path 38 and the resin on the forward end side of the valve casing 16 can be held to a high temperature. COPYRIGHT: (C)2004,JPO&NCIPI
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