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1. 发明公开

EP2781330A1 PREFORM EXTRUSION MOLDING APPARATUS, METHOD FOR EXTRUSION MOLDING, AND PREFORM 有权
标题翻译： VORFORMSTRANGPRESSVORRICHTUNG，VERFAHREN ZUM STRANGPRESSEN UND VORFORM
公开(公告)号：EP2781330A1
公开(公告)日：2014-09-24
申请号：EP12850543.5
申请日：2012-11-06
申请人： Yoshino Kogyosho Co., Ltd.
发明人： CHIBA, Junichi , SHIMIZU Kazuhiko , HOSOKOSHIYAMA, Hiroshi
IPC分类号： B29C45/16 , B29B11/08 , B29C45/76 , B29C49/06 , B29C49/22
CPC分类号： B29D22/00 , B29B11/08 , B29B2911/1406 , B29B2911/14066 , B29B2911/1408 , B29B2911/14093 , B29B2911/141 , B29B2911/1444 , B29B2911/14466 , B29B2911/14473 , B29C45/1603 , B29C45/1646 , B29C45/77 , B29C49/06 , B29C49/12 , B29C49/22 , B29C2045/1648 , B29C2945/76568 , B29C2945/76755 , B29K2105/258 , B29L2009/00 , B65D23/02
摘要： A technical problem of this invention is to control the behavior of an intermediate layer in the preform bottom at high productivity and in a high degree of accuracy in the injection molding of a preform having a second-resin layer laminated with main-resin layers A principal means of this invention to solve this technical problem is a process for injection molding a preform in a test tube shape having an intermediate layer of a second-resin layer laminated with main-resin layers. This process comprises the steps of: supplying a main resin from an outer flow channel and an inner flow channel to a joined flow channel at a predetermined supply velocity for a predetermined period of time; supplying a second resin from a middle flow channel to the joined flow channel simultaneously with the main resin at a predetermined supply velocity for a certain period of time within the predetermined period of time; and sliding a shut-off pin to bring the pin forefront to a predetermined position near an outlet of the inner flow channel, which is open to the joined flow channel, previously before the second resin is supplied, or during a period of time starting after a predetermined time from the start of the second resin supply and ending with the termination of the supply, so that the velocity of main resin supply from the inner flow channel to the joined flow channel is reduced to a predetermined level by adjusting the degree of aperture for the outlet.
摘要翻译：本发明的技术问题是以具有主树脂层层叠的第二树脂层的预成型体的注塑成型，以高生产率和高精度控制预成型坯底部的中间层的性能A主体本发明解决该技术问题的手段是将具有层叠有主树脂层的第二树脂层的中间层的试管形状的预成型体注射成型的方法。该方法包括以预定的供给速度将主树脂从外流道和内流道供给到接合流路预定时间段的步骤; 在规定的时间内，以规定的供给速度，将来自中间流路的第二树脂与主树脂同时向所述接合流路供给一段时间; 并且滑动关闭销以将销钉最前端延伸到预先在第二树脂供应之前或在从第二树脂供应之后的时间段内的内部流动通道的出口附近的预定位置，该内部流动通道对接合的流动通道敞开从第二树脂供应开始到结束供给结束的预定时间，从而通过调节孔径的程度将从内流道到接合流道的主树脂供给速度降低到预定水平为出口。

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