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
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0.40 s，熔体温度280℃，模具温度72℃，保压压力60 MPa，此时制件的最大翘曲变形量最小，为0.509 0 mm，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0.530 mm，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。
薄壁制件
注塑成型
正交试验
有限元模拟
warpage deformation
thin-walled part
injection molding
orthogonal experiment
finite element simulation
Abstract
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.
中图分类号 TQ320.66 TP391.7 DOI 10.11973/jxgccl201911004
所属栏目 新材料 新工艺
基金项目 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）
收稿日期 2018/8/3
修改稿日期 2019/8/12
网络出版日期
作者单位点击查看
备注丁永峰(1987-),男,陕西汉中人,讲师,硕士
引用该论文: DING Yongfeng,LONG Chanjuan. Optimization of Injection Process Parameters of PC+ABS Engineering Plastic Alloy Thin-walled Parts[J]. Materials for mechancial engineering, 2019, 43(11): 12～15
丁永峰,龙婵娟. PC+ABS工程塑料合金薄壁制件注塑工艺参数的优化[J]. 机械工程材料, 2019, 43(11): 12～15
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【3】肖国华, 董彦, 张适, 等. Ipad平板电脑面壳成型CAE优化分析[J]. 塑料工业, 2013, 41(8):66-71.
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【6】江舜成, 文劲松, 谢海玲, 等. 基于MoldFIow MPI软件的注射阶段能耗研究[J]. 中国塑料, 2015, 29(4):70-74.
【7】王树勋. 基于Moldflow的薄板塑件翘曲成因与改善措施[J]. 模具工业, 2010, 36(6):10-13.
【8】KITAYAMA S, YAMAZAKI Y, TAKANO M. Numerical and experimental investigation of process parameters optimization in plastic injection molding using multi-criteria decision making[J]. Simulation Modelling Practice and Theory,2018, 85:95-105.
【9】KOVACS J G, SIKLO B. Investigation of cooling effect at corners in injection molding[J]. International Communications in Heat and Mass Transfer,2011, 38:1330-1334.
【10】AZAMAN M D, SAPUAN S M, SULAIMAN S. Shrinkages and warpage in the processability of wood-filled polypropylene composite thin-walled parts formed by injection molding[J]. Materials & Design, 2013, 52:1018-1026.
【11】SINGH G, PRADHAN M K, VERMA A. Multi response optimization of injection moulding process parameters to reduce cycle time and warpage[J]. Materials Today:Proceedings, 2018, 5:8398-8405.
【12】OKTEM H, ERZURUMLU, UZMAN T I. Application of Taguchi optimization technique in determining plastic injection molding process parameters for a thin-shell part[J]. Materials & Design, 2007, 28(34):1271-1278.
【13】CHAKRAVORTY S. PVT testing of polymers under industrial processing conditions[J]. Polymer Testing, 2002, 21(3):313-317.
【14】SIN LT, RAHMAT A R, RAHMAN W A W A, et al. Rheology and thermal transition state of polyvinyl alcohol-cassava starch blends[J]. Carbohydrate Polymers, 2010, 81(3): 737-739.
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【17】徐戊矫, 丁永峰, 邹明平, 等. 大型厚壁封头热锻成形中降低成型载荷的策略[J]. 热加工工艺, 2011, 40(7): 76-78.
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【19】王冠, 王旭林, 寇琳媛, 等. 基于多因子交互作用的PP/EPDM复合材料注射成型工艺优化[J]. 机械工程材料, 2018, 42(3): 87-94.
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