| 摘要 |
PROBLEM TO BE SOLVED: To prevent the intrusion of molten metal leaked out from the abutting surface between an injection nozzle and a metallic mold into a nozzle cover covering the injection nozzle, in a light metal injection-molding machine. SOLUTION: The nozzle cover 20 covers a nozzle heater 2a etc., for injection nozzle 1 and has a fitting hole 20h to be inserted from the tip end part of the injection nozzle. At the tip cylindrical part 1f of the injection nozzle 1, an annular groove 1c is formed and a seal member 21 inserted so as to be attachable/detachable into the annular groove is prepared and a gap between the injection nozzle and the fitting hole, is sealed with the seal member inserted into the annular groove. This seal member can be used for a marketed C-shaped stopping ring 22 and can be constituted of a first member 23 attachable/detachable to the annular groove at the upper part of the above nozzle and a U-shaped second member 24 provided with a restrained projecting part 24c attached/detached to the annular groove at the lower part of the above nozzle and also, restrained with the above first member by elastically deforming. COPYRIGHT: (C)2004,JPO&NCIPI
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