PC+ABS工程塑料合金薄壁制件注塑工艺参数的优化  

Optimization of Injection Process Parameters of PC+ABS Engineering Plastic Alloy Thin-walled Parts

作　　者：丁永峰 龙婵娟 DING Yongfeng;LONG Chanjuan(College of Mechanical and Electronic Engineering,Chongqing University of Arts and Sciences,Chongqing 402160,China)

机构地区：[1]重庆文理学院机电工程学院

出　　处：《机械工程材料》2019年第11期12-15,31,共5页Materials For Mechanical Engineering

基　　金：重庆市教委科学技术研究项目(KJ1711290);重庆文理学院校级科研项目(2017ZJD13);重庆文理学院学生科研立项项目(XSKY2017053)

摘　　要：以某畅销手机后盖为例,采用正交试验方法,应用MoldFlow软件模拟了注射时间、熔体温度、模具温度、保压压力等对PC+ABS工程塑料合金制件最大翘曲变形量的影响,得到最佳的注塑工艺参数;采用模拟得到的最佳工艺参数进行试制生产,以验证模拟结果的可靠性。结果表明:注塑工艺参数对手机后盖薄壁制件翘曲变形影响的主次顺序为注射时间、熔体温度、模具温度、保压压力;模拟得到制件的最佳注塑工艺参数为注射时间0.40s,熔体温度280℃,模具温度72℃,保压压力60MPa,此时制件的最大翘曲变形量最小,为0.509 0mm,翘曲变形主要出现在手机后盖四角处,耳机插孔旁的翘曲变形量最大;在优化工艺参数下试制产品的最大翘曲变形量为0.530mm,翘曲变形位置与有限元模拟结果一致,这验证了模拟结果的可靠性。Taking the back cover of a best-selling mobile phone as an example,the effects of injection time,melt temperature,mould temperature and holding pressure on the maximum warpage deformation of PC+ABS engineering plastic alloy parts were simulated by MoldFlow software via orthogonal test method,and the optimum injection process parameters were obtained.The trial production was carried out with the optimum process parameters obtained by simulation in order to verify the reliability of the simulation results.The results show that the primary to secondary sequence of injection process parameters that affected warpage deformation of thin-walled parts of mobile phone back cover was injection time,melt temperature,mould temperature and holding pressure.The optimum injection molding parameters obtained by simulation were injection time of 0.40 s,melt temperature of 280℃,mould temperature of 72 ℃ and holding pressure of 60 MPa,and at this point the maximum warpage deformation of the part was the smallest with the value of 0.509 0 mm;warpage deformation mainly occurred at four corners of the back cover of mobile phone,and the position beside headphone jack had the maximum warpage deformation.The maximum warpage deformation of the trial-produced product was 0.530 mm with the optimum process parameters,and the warpage deformation location was consistent with the finite element simulation result,which verified the reliability of the simulation results.

关 键 词：翘曲变形 薄壁制件 注塑成型 正交试验 有限元模拟 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业] TP391.7[自动化与计算机技术—计算机应用技术]