公开(公告)号：US5656228A

公开(公告)日：1997-08-12

申请号：US490838

申请日：1995-06-15

申请人： Masaki Fujii ,  Shinjiro Saihara ,  Toyotsugu Itoh

发明人： Masaki Fujii ,  Shinjiro Saihara ,  Toyotsugu Itoh

IPC分类号： B29C45/73 ,  B29C45/00 ,  B29C45/57 ,  B29D11/00 ,  B29L11/00

CPC分类号： B29D11/00009 ,  B29C45/00 ,  B29L2011/0016

摘要： In an injection molding method, a resin is injected into a cavity of a mold in such a manner that a pressure ratio of a cavity surface pressure in the cavity to a cylinder pressure of an injection molding device is not less than 0.65, a first pressure keeping process to keep the cylinder pressure at a constant is conducted after the filling step, the cylinder pressure is increased so that the cavity surface pressure in the cavity is 0.95 times or more larger than the pressure at the time that the cavity has been filled with the resin; and a second pressure keeping process to keep the changed increased pressure at least until a cavity surface temperature becomes lower than a glass transition temperature of the resin.

摘要翻译： 在注射成型方法中，将树脂注射到模具的空腔中，使得空腔中的腔表面压力与注射成型装置的气缸压力的压力比不小于0.65，第一压力 在填充步骤之后进行将气缸压力保持在恒定的保持过程，气缸压力增加，使空腔中的空腔表面压力为空腔填充时的压力的0.95倍或更大 树脂; 以及第二压力保持过程，以保持改变的增加的压力至少直到腔表面温度变得低于树脂的玻璃化转变温度。