气辅注射成型注气充填数学建模和数值模拟的若干关键技术  

Modeling of cavity filling of gas assisted injection molding and some key techniques for numerical simulation

作　　者：柳和生[1] 孙燕萍[1] 揭小平[1] 

机构地区：[1]南昌大学聚合物加工研究室,南昌330029

出　　处：《塑性工程学报》2003年第2期71-74,共4页Journal of Plasticity Engineering

基　　金：江西省主要学科跨世纪学术和技术带头人培养计划资助

摘　　要：对气体辅助注射注气充填过程的数学描述归结为一组偏微分方程及定解条件。详细说明了压力场和温度场耦合计算方法。通过有限元/有限差分混合算法来求解流动模拟问题,在气-熔边界和熔体前沿同时跟踪及其时间增量的确定上,结合固定网格法和著名软件Moldflow的编程思想,采用一种新的计算方法,即可以避免数值解的不稳定,又可以大大缩短计算时间。In this paper, the mathematic model was established for numerical simulation of cavity filling of gas assisted injection molding. The coupling algorithm for computation of pressure and temperature was expounded, which includes the hybridizing FEM/FDM method. On the basis of the front tracking technique of Moldflow software package, a new method was developed to track the melt front and the gas-melt interface, which can eliminate the instability and save time of numerical simulation.

关 键 词：气体辅助注射成型 数值模拟 压力场 温度场 有限元 有限差分 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]