公开(公告)号：US5439371A

公开(公告)日：1995-08-08

申请号：US128295

申请日：1993-09-29

申请人： Atsushi Sawaya

发明人： Atsushi Sawaya

IPC分类号： B29C45/38 ,  B29C45/40 ,  B29C45/57

CPC分类号： B29C45/38 ,  B29C45/4005 ,  B29C45/572

摘要： A locally pressurizing type injection molding machine includes a stationary die and a movable die, so that a molded product can be formed by charging a resin into a cavity defined between the dies. A pressurizing pin extends through the movable die and has its tip end facing at least one of a resin passage and the cavity. A pressurizing cylinder is disposed at the rear of the pressurizing pin to move the pressurizing pin through the pressurizing rod. Therefore, the resin charged in the cavity can be pressurized by advancing the pressurizing pin into a resin passage, for example, a gate, the cavity or the like and hence, it is possible not only to provide an extremely thin molded product, but also to prevent the generation of a sink mark. The area occupied by the movable platen can be reduced by disposing the pressurizing rod and ejector rod coaxially.

摘要翻译： 局部加压型注射成型机包括固定模具和可动模具，从而可以通过将树脂填充到模具之间限定的空腔中来形成模制产品。 加压销延伸穿过可动模具并且其顶端面向树脂通道和空腔中的至少一个。 加压缸设置在加压销的后部，以使加压销移动通过加压杆。 因此，通过将加压销推入树脂通路，例如门，空腔等，能够对填充在空腔内的树脂进行加压，不仅可以提供非常薄的成型品，而且还可以 以防止产生下沉标记。 可以通过同轴地设置加压杆和推杆来减小可动压板占据的面积。