新型楔形挤出机头的设计

Design of Novel Cuneiform Extrusion Die

引入有效延伸应变SW 来描述流道内分子链的延伸取向程度。同时 ,在设计中首次取消了传统的出口平直段 ,而将挤出流道设计成双锥角结构 ,并在此基础上 ,以增大有效延伸应变为目标 ,通过优化选取机头结构参数 ,以提高流道内熔体高分子链的延伸取向程度。因此 ,它为自增强流场设计方面的研究提供理论指导 。

To describe extended orientation degree of polymer molecular chains in runner,effective extended strain S w is cited.Extrusion runner is designed with twin taper structure by cancelling out conventional exit flat section.Based on the improvement,orientation degree of polymer molecular chains will be enhanced by optimizing the parameters of dies.It will be of engineering consequence to research self reinforcement flow field.