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1. 发明授权

US5028227A Injection molding nozzle with replaceable gate insert 失效
标题翻译：带可更换门的插入式注塑喷嘴
公开(公告)号：US5028227A
公开(公告)日：1991-07-02
申请号：US265408
申请日：1988-10-31
申请人： Jobst U. Gellert , Robert R. Freier , James J. Sheffield
发明人： Jobst U. Gellert , Robert R. Freier , James J. Sheffield
IPC分类号： B29C45/27 , B29C45/30
CPC分类号： B29C45/2711 , B29C45/278 , B29C45/30 , B29C2045/2761
摘要： A sprue gated injected molding system having nozzles with a removable hollow gate insert received in a seat in the forward end of each nozzle to form the gate. Each gage insert has a forward portion with a tapered outer surface which abuts against a matching tapered surface of an opening through to mold to the cavity. The forward portion of the gate insert is resilient which ensures extremely good contact between them under bearing pressure due to thermal expansion of the nozzle. Thus optimum uniform heat transfer is provided between the gate insert and the cooled mold. The gate insert has a circumferential removal flange to facilitate it being pryed out of the seat if replacement is required. In an alternate embodiment an elongated torpedo is seated centrally in the melt bore of each nozzle. The torpedo has an outer retaining ring and a number of radially extending tapered fins which form melt flow channels between them. The torpedo is mounted with the retaining ring secured in the seat in the forward end of the nozzle by the gate insert and a pointed tip formed by the fins extending to provide additional heat in or adjacent the gate. The torpedo has pointed tips at opposite ends and is reversible for different dimensioned applications.
摘要翻译：浇口浇口注射成型系统具有喷嘴，其具有容纳在每个喷嘴的前端中的座中的可移除的中空浇口刀片，以形成浇口。每个量具插入件具有前部，其具有锥形的外表面，其与开口的匹配的锥形表面抵接以模制到空腔。门插入件的前部是弹性的，这确保了由于喷嘴的热膨胀而在轴承压力下它们之间的极好的接触。因此，在浇口插入件和冷却的模具之间提供最佳的均匀传热。门插入件具有周向移除法兰，以便在需要更换时便于将其从座椅中撬出。在替代实施例中，细长的鱼雷位于每个喷嘴的熔体孔中央。鱼雷具有外保持环和多个径向延伸的锥形翅片，它们之间形成熔体流动通道。鱼雷安装有固定环，其通过门插入件固定在喷嘴前端中的座中，并且由翅片形成的尖端延伸以在门中或邻近门处提供额外的热量。鱼雷在相对的两端有尖头，对于不同尺寸的应用是可逆的。

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