外部气体辅助注塑制品翘曲变形数值模拟  

Numerical Simulation on Warpage of External Gas-Assisted Injection-Molded Parts

作　　者：肖清武 柳和生[1] 黄益宾[2] XIAO Qingwu;LIU Hesheng;HUANG Yibin(Polymer Processing Laboratory of Nanchang University,Nanchang 330031,China;The Key Laboratory of Jiangxi Province on Preparation of Materials,Shangrao Normal University,Shangrao 334001,China)

机构地区：[1]南昌大学聚合物成型研究室,江西南昌330031 [2]上饶师范学院,江西省塑料制备成型重点实验室,江西上饶334001

出　　处：《中国塑料》2020年第3期48-53,共6页China Plastics

基　　金：江西省高等学校科技落地计划项目(KJLD13087)。

摘　　要：基于聚合物黏弹性理论与外部气体辅助注塑(EGAIM)的特点,构建了EGAIM气体保压阶段及脱模后自然冷却阶段制品内应力-应变的力学模型。在此基础上,采用耦合有限元法(FEM)对EGAIM平板制件的翘曲变形进行模拟计算,模拟结果与实验结果基本一致,验证了所建计算模型有效可靠。Based on the viscoelastic theory of polymers and the characteristics of external gas-assisted injection molding(EGAIM),a mechanical model for the stress-strain in both gas-packing stage and natural cooling stage of EGAIM was established. According to this mechanical model,the warpage of flat parts molded by EGAIM was simulated by a coupled finite element method. The simulation results were basically consistent with the experimental results,indicating that the model was effective and feasible.

关 键 词：外部气体辅助注塑 力学模型 耦合有限元法 翘曲变形 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]