基于随形冷却的电熔管道弯头注塑成型残余应力控制研究  

Research on Residual Stress Control of Injection-molded Fused Pipe Elbow Based on the Conformal Cooling System

作　　者：李金国[1,2,3] 张建均[2] 曾富财[2] 陈卫[2] 林康[1] 张树友[3] 

机构地区：[1]台州职业技术学院模具研究所,浙江台州318000 [2]永高股份有限公司,浙江台州318020 [3]浙江大学机械工程学院,浙江杭州310027

出　　处：《塑料工业》2017年第3期92-96,共5页China Plastics Industry

基　　金：浙江省自然科学基金资助项目(LY15E060001);台州职业技术学院重点课题资助项目(2015ZD10)

摘　　要：电熔管道弯头作为连接燃气管道的转接头,在配合面上要求较高的装配精度,防止燃气的泄漏。根据弯头的服役工况,选用高密度聚乙烯(HDPE)作为成型原料,由于HDPE具有较大的收缩性,导致弯头成型后出现较大的收缩变形。针对上述问题,采用随形冷却系统,提高模具的温度场均匀性;结合数值模拟技术,对弯头注塑成型工艺进行优化,从而有效降低制品的注塑成型收缩率和残余应力。最后,根据数值模拟结论开发了弯头的模具,经试模,制品合格。As the connection of gas pipeline connector, the fused pipe （elbow） of the mating surfaces needs high assembly precision to prevent gas leakage. According to elbow working conditions, high density polyethylene （HDPE） as molding material was selected. The larger shrinkage rate of the HDPE material led to the larger shrinkage deformation after injection molding. According to the above problem, the conformal cooling system was designed to improve the uniformity temperature field for the injection mould. Numerical simulation technology was used to optimize the molding process parameters so as to decrease the shrinkage rate and residual stress. Finally, according to the numerical simulation results, the elbow mould was developed, and after the test, products met the requirements of qualified.

关 键 词：电熔管道弯头 数值模拟 收缩率 残余应力 模具设计 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]