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11. 发明授权

US06544459B2 Method of injection molding multi-layered articles 有权
标题翻译：注塑多层物品的方法
公开(公告)号：US06544459B2
公开(公告)日：2003-04-08
申请号：US09964726
申请日：2001-09-28
申请人： Katsuya Maruyama , Takeshi Hara , Yoshihiro Terada , Takao Ota
发明人： Katsuya Maruyama , Takeshi Hara , Yoshihiro Terada , Takao Ota
IPC分类号： B29C4516
CPC分类号： B29C45/1643 , B29B2911/1402 , B29B2911/14026 , B29B2911/1404 , B29B2911/1408 , B29B2911/14086 , B29B2911/14093 , B29B2911/1412 , B29B2911/14126 , B29B2911/14146 , B29B2911/14153 , B29B2911/14593 , B29B2911/14653 , B29B2911/14713 , B29C45/1603 , B29C45/1646
摘要： An injection molding apparatus for injection molding a multi-layered article, which comprises; (a) a mold having a cavity block provided with a cavity and a hot runner block, (b) at least a first injection cylinder and a second injection cylinder, (c) a first resin-flow-passage for connecting an inside of the first injection cylinder and the cavity, and (d) a second resin-flow-passage for connecting an inside of the second injection cylinder and the cavity, the injection molding apparatus having a structure in which those portions of the first and second resin-flow-passages which are located within the mold are provided in the hot runner block, and the first resin-flow-passage and the second resin-flow-passage meet with each other in a junction portion upstream to a gate portion opened to the cavity, the injection molding apparatus being provided with back flow means for letting first molten resin in the first resin-flow-passage flow into the second resin-flow-passage after second molten resin is injected into the cavity through the second resin-flow-passage, the back flow means being operable with a pressure which the first molten resin in the first resin-flow-passage exerts on second molten resin in the second resin-flow-passage.
摘要翻译：一种注射成型多层制品的注射成型装置，包括：（a）模具，其具有设置有空腔的模腔和热流道块，（b）至少第一注射缸和第二注射缸，（c）第一树脂流动通道，用于连接第一注射筒和所述腔，以及（d）用于连接所述第二注射筒和所述腔的内部的第二树脂流动通道，所述注射成型装置具有这样的结构，其中所述第一和第二树脂流的那些部分位于模具内的通道设置在热流道块中，并且第一树脂流动通道和第二树脂流动通道在与空腔相通的门部分的上游的接合部分中相互相接，注射成型装置设置有后流动装置，用于使第一树脂流通道中的第一熔融树脂通过第二树脂流动通道将第二熔融树脂注入到空腔中之后流入第二树脂流动通道，回流装置可在第一树脂流动通道中的第一熔融树脂在第二树脂流动通道中的第二熔融树脂上施加的压力下操作。

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