CIESC Journal

• 材料化学工程与纳米技术 • 上一篇    下一篇

注塑充填过程变厚度截面速度压力场数值模拟

刘永志;赵振峰;马兰;申长雨   

  1. 郑州大学橡塑模具国家工程研究中心

  • 出版日期:2009-07-05 发布日期:2009-07-05

Numerical simulation for velocity and pressure in filling stage of injection molded parts with uneven thickness

LIU Yongzhi;ZHAO Zhenfeng;MA Lan;SHEN Changyu   

  • Online:2009-07-05 Published:2009-07-05

摘要:

采用有限元法,对注塑充填过程中“凸”型和“刀”型塑件截面的速度场和压力场进行数值模拟。通过结果分析得出:广义Hele-Shaw流动假设在熔体前沿部分不合理,在塑件截面突变处Hele-Shaw假设也失效,尤其在突变的较宽截面处误差更大。

Abstract:

The velocity and pressure in the filling stage of injection-molded parts with uneven thickness were simulated with finite element method(FEM).For given examples,the simulation results illustrated that the Hele-Shaw approximation did not work for the flow front and the area where the thickness was suddenly changed.The Hele-Shaw approximation tends to give larger error in the thick part if the thickness is changed.