模腔表面平均温度边界对注塑仿真的影响  

Influence of the Average Temperature Boundary Condition on Mold Cavity Surface to Injection Molding Simulation

作　　者：申长雨[1] 郭恒亚[1] 赵振峰[1] 黄明[1] 

机构地区：[1]郑州大学橡塑模具国家工程研究中心,河南郑州450002

出　　处：《郑州大学学报（工学版）》2005年第1期9-12,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家杰出青年科学基金资助项目(10225211)

摘　　要：应用一维有限元方法进行注塑成型过程中温度场的计算机模拟,讨论采用模腔表面平均温度边界条件对传热分析造成的误差.结果显示,当对模具的精度要求不高时,误差是可以接受的;但对于精密注塑件,或者制件很薄,这种误差则会对数值分析产生影响.针对这种情况,根据实际的瞬态温度分布,提出一种用平均温度构造近似的瞬态温度场方法,以提高注塑数值模拟的精度.　In this paper, we use one-dimension finite element method which simulates the temperature field in the course of injection molding, and discuss the error in the process of heat-transit analysis when the average temperature of the mold cavity acts the boundary condition. It is found that the error is acceptable if the requirement to mold accuracy is not very high. However, the error does affect the simulation for the precise or very thin injection-molded parts. Then, the paper advances another method which simulates an instantaneous temperature on the basis of the average temperature to improve the precision degree of numerical simulation in the injection molding.

关 键 词：注塑成型过程 注塑件 制件 瞬态温度场 中温 模具 传热分析 表面平均温度 精度要求 数值分析 

分 类 号：TQ320[化学工程—合成树脂塑料工业] TU832.16[建筑科学—供热、供燃气、通风及空调工程]