| 摘要 |
PURPOSE: A nozzle device used for a grommet mold apparatus is provided to minimize the heat having taken away in the bottom of a nozzle device to a mold body by minimizing the contact area of a backflow preventing contact portion. CONSTITUTION: A nozzle device used for a grommet mold apparatus comprises a tip(67), an inner cylinder(63), a heater(65), a temperature sensor(62) and an outer cylinder(64). A jetting hole(67a) is located in the top of the tip. The jetting hole is closely to the gate of a forming mold and jets the liquid injection material. The tip is inserted in the lower part of the inner cylinder. The liquid injection material passes through the inner cylinder. The heater protects the outer circumference of the inner cylinder. The temperature sensor is inserted in the groove formed in the outer circumference of the inner cylinder into the longitudinal direction. The outer cylinder protects the inner cylinder including the temperature sensor and heater.
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