化工学报 ›› 2012, Vol. 63 ›› Issue (1): 157-162.DOI: 10.3969/j.issn.0438-1157.2012.01.022

• 过程系统工程 • 上一篇    下一篇

基于SPH方法的微注射成型数值模拟

张响1,2,李倩1,石凡1,申长雨1   

  1. 1郑州大学国家橡塑模具工程研究中心;2郑州大学机械工程学院
  • 收稿日期:2011-03-23 修回日期:2011-08-11 出版日期:2012-01-05 发布日期:2012-01-05
  • 通讯作者: 李倩

Micro injection molding simulation based on SPH method

ZHANG Xiang1,2,LI Qian1,SHI Fan1, SHEN Changyu1   

  1. 1National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University;2School of Mechanical Engineering,Zhengzhou University
  • Received:2011-03-23 Revised:2011-08-11 Online:2012-01-05 Published:2012-01-05

摘要: 基于无网格方法和黏性本构方程,开展微注射成型数值模拟的研究。采用光滑粒子流体动力学的粒子近似法离散N-S 控制方程组,求解速度场、压力场、温度场等物理场的变化规律。以应用于生物医学领域带有细微针头的聚合物微针为例,进行充型过程的数值模拟,模拟结果与实验结果基本一致。

关键词: 微注射成型, 无网格方法, 光滑粒子流体动力学, 数值模拟

Abstract: Micro injection molding is an efficient and low cost process for the large-scale replication of thermoplastic polymer microparts.Numerical simulation in cavity filling is important to mold design and process parameters setting before mold manufacture.A meshfree-based method for solving viscosity equations was proposed to simulate the filling process of micro injection molding.The N-S governing equations were discretized by using a particle approximate method of smooth particle hydrodynamics.Some physical properties,such as velocity,pressure,and temperature were investigated in the filling process.As an example,mold cavity filling simulation for a microneedle used in biomedical application was performed,and the results were consistent with experiment.Compared with the traditional mesh method,such as three dimensional finite element method,with corresponding node or particle number and process condition,the proposed meshfree method showed advantages of higher accuracy and calculation efficiency.

Key words: micro injection molding, meshfree method, smooth particle hydrodynamics, numerical simulation