公开(公告)号：US4793954A

公开(公告)日：1988-12-27

申请号：US86119

申请日：1987-08-17

申请人： Biing-Lin Lee ,  Cameron Cranston

发明人： Biing-Lin Lee ,  Cameron Cranston

IPC分类号： B29C45/00 ,  B29C33/00 ,  B29C33/08 ,  B29C45/58 ,  B29C45/76 ,  B29C47/00 ,  B29C47/54 ,  B29C47/12

CPC分类号： B29C47/0071 ,  B29C45/585 ,  B29C47/54 ,  B29C2045/0098 ,  B29C45/7646 ,  B29C47/0009 ,  B29K2105/12 ,  B29K2105/16

摘要： Various processing advantages are gained when ultrasonic vibration is applied to a thermoplastic processing apparatus such as an extruder or an injection molding device. Such advantages include improved flow rate, reduced processing pressure, and consequently reduced processing temperature to mold or extrude the melted thermoplastic. The ultrasonic vibration is desirably applied to the die of the processing apparatus and in a direction longitudinal to the flow of the thermoplastic. Suitable thermoplastics include polystyrene and polyolefins.