塑料接线盒的型腔残余应力正交优化
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摘要
由于塑料接线盒结构比较复杂,面上和侧边有多个小孔,对于注塑成型时熔体流动的阻碍改向较多,易产生较大的型腔内残余应力,影响塑件强度。笔者设计了正交试验方案列表,并对每个方案组合进行了Moldflow分析,研究了模具温度、注射时间、保压时间、冷却时间、熔体温度和保压压力6个参数对型腔残余应力的影响,找到了不同因素的影响力大小,合理进行了工艺参数组合的优化,找到了残余应力最小时的最佳工艺参数组合。试验结果表明:正交试验可以针对试验指标结果进行某一注塑参数的精准优化,避免大量无序摸索,节省了注塑企业的时间和材料成本。
The structure of the plastic junction box was complex with many small holes on the sides. There were many hindrances to the melt flow during injection molding. It was easy to produce larger cavity residual stress affecting the strength of plastic parts. The list of scientific orthogonal test plans was designed. And each scheme combination was analyzed by Moldflow. The influences of mold temperature,injection time,holding time,cooling time,melt temperature and holding pressure on the variation of residual stress in cavity were studied. The influences of different factors were found. The combination of process parameters was reasonable optimized. The best technology parameters of minimum residual stress were found. The test results show that the orthogonal test can be used to optimize the injection parameters accurately according to the test index,avoid a large number of random exploration and save time and material cost of injection enterprises.
The structure of the plastic junction box was complex with many small holes on the sides. There were many hindrances to the melt flow during injection molding. It was easy to produce larger cavity residual stress affecting the strength of plastic parts. The list of scientific orthogonal test plans was designed. And each scheme combination was analyzed by Moldflow. The influences of mold temperature,injection time,holding time,cooling time,melt temperature and holding pressure on the variation of residual stress in cavity were studied. The influences of different factors were found. The combination of process parameters was reasonable optimized. The best technology parameters of minimum residual stress were found. The test results show that the orthogonal test can be used to optimize the injection parameters accurately according to the test index,avoid a large number of random exploration and save time and material cost of injection enterprises.
引文
[1]李彦奎,吕彦明,倪明明.基于正交试验的航空叶片精锻模具磨损分析[J].工程设计学报,2017,24(6):632-637.
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[8]陈泽中,赵娜.基于正交试验和多目标规划的微齿轮注塑成型数值模拟研究[J].塑形工程学报,2017,24(6):214-220.
[9]蒋波,蔡飞鹏,李晓宇,等.基于正交实验的增韧尼龙6注塑工艺优化[J].塑料,2018,47(2):61-64.
[2]王乾,张平,徐自明.一种端盖类塑件的模具创新优化设计[J].塑料科技,2015,43(10):90.
[3]邓召旭,刘泓滨,王学军.基于均匀设计的高光注塑件残余应力研究[J].轻工机械,2015,33(4):20.
[4]李金国,张建均,曾富财,等.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[J].塑料工业,2017,45(3):92-96.
[5]刘成娟,刘成刚,刘艳,等.基于CAE与正交试验法的工艺参数对翘曲变形的影响分析[J].中国塑料,2018,32(1):104.
[6]金亚云.基于正交试验与CAE对塑件翘曲变形进行分析[J].模具工业,2017,43(12):15.
[7]廖炫,郭震宁,潘诗发,等. LED汽车前大灯散热器正交优化设计与分析[J].光子学报,2016,45(11):68-73.
[8]陈泽中,赵娜.基于正交试验和多目标规划的微齿轮注塑成型数值模拟研究[J].塑形工程学报,2017,24(6):214-220.
[9]蒋波,蔡飞鹏,李晓宇,等.基于正交实验的增韧尼龙6注塑工艺优化[J].塑料,2018,47(2):61-64.