公开(公告)号：US5968446A

公开(公告)日：1999-10-19

申请号：US509895

申请日：1995-08-01

申请人： Teiji Shimobayashi ,  Tetsumi Ichioka ,  Kenji Sugiyama ,  Yasunobu Teramoto

发明人： Teiji Shimobayashi ,  Tetsumi Ichioka ,  Kenji Sugiyama ,  Yasunobu Teramoto

IPC分类号： B29C45/17 ,  B29C45/00

CPC分类号： B29C45/1704

摘要： A method of molding a hollow body to make the body nearly uniform in thickness around an internal opening thereof. A weir is provided in a central part of an opening portion of the mold cavity near an upstream side of the opening portion with respect to the direction of flow of a resin. Molten resin is injected into the cavity, and pressurized gas is thereafter injected into the molten resin in the cavity to make the internal opening in the resin. Since the weir is provided, the resin comes into uniform contact with the inner mold surface of the die at the opening portion as the resin flows into opening portion. The resin is uniformly cooled and solidified, starting with the inner surface and working inwardly, so that the hollow body is made nearly uniform in thickness around the internal opening.

摘要翻译： 一种模制中空体以使身体在其内部开口周围几乎均匀的厚度的方法。 相对于树脂的流动方向，在开口部的上游侧附近，在模腔的开口部的中央部设置有堰。 将熔融树脂注入空腔中，然后将加压气体注入到空腔中的熔融树脂中以使树脂中的内部开口。 由于设置了堰，当树脂流入开口部时，树脂在开口部处与模具的内模表面均匀地接触。 树脂被均匀地冷却和固化，从内表面开始并向内工作，使得中空体在内部开口周围的厚度几乎均匀。