| 摘要 |
PURPOSE: An injection nozzle for molding a plastic product is provided to increase the heating effect by inserting an electrothermal wire in an insertion groove at the same height as the outer surface of a body, to easily control the resin flow, the temperature and the opening and shutting of a valve gate by supporting a valve pin up and down, and to constantly maintain the resin temperature by mounting an auxiliary device. CONSTITUTION: In an injection nozzle for molding plastic product, the upper part of a valve pin(1) opening and shutting a valve gate(16) placed in the center of a resin sprue runner(2) is inserted and supported in a pin hole(4) of a retaining plate(5) with many resin passages(3). The lower part of the valve pin is supported in a pin retaining hole of tripod-type formed with a vent hole and a protrusion part integrated with a body(17). An electrothermal wire(10) is inserted in an insertion groove(9) formed on the outer surface of the nozzle at the same height as the outer surface of a body. An auxiliary device(13) formed with a stepped portion(12) serving as a resin sprue runner in a manifold(18) on the top of a flange(11) is mounted so that the highest stepped groove(14) of the stepped portion passes through an outer resin sprue runner(15).
|
