汽车车窗装饰板浇口分析及注塑工艺优化  

Gate Analysis and Optimization of Injection Molding Process for Car Window Decorative Panel

作　　者：孙庆东[1] 汪五二 池根才 金垚 Sun Qingdong;Wang Wuer;Chi Gencai;Jin Yao(School of Mechanical Engineering,Yangzhou Polytechnic College,Yangzhou 225009,China;OMNEX(Shanghai)Consulting Co.,Ltd.,Shanghai 201100,China;Yangzhou Shengshi Moulding Technology Co.,Ltd.,Yangzhou 225002,China)

机构地区：[1]扬州市职业大学机械工程学院,江苏扬州225009 [2]奥曼克(上海)咨询有限公司,上海201100 [3]扬州盛世模塑科技有限公司,江苏扬州225002

出　　处：《工程塑料应用》2023年第7期79-84,共6页Engineering Plastics Application

基　　金：江苏省“十四五”高校国际化人才培养品牌专业建设项目(202244)。

摘　　要：以汽车车窗装饰板为研究对象,利用Moldflow软件对4个浇口方案进行成型仿真,将体积收缩率和翘曲变形量作为衡量方案优劣的指标,得到短边大浇口方案为最优方案。将注射时间、熔体温度、模具温度、保压压力和保压时间作为析因设计的5个因素,利用Minitab软件设计析因试验方案,以体积收缩率和翘曲变形量为响应指标进行方差分析,从而确定各因素及因素交互作用对响应指标的影响程度,运用弯曲项的P值和主效应图判断回归方程为非线性方程。在析因设计的基础上追加响应曲面设计的序贯试验,得到了体积收缩率和翘曲变形量的回归方程。以体积收缩率小于5.5%和翘曲变形量小于0.5mm为优化目标,实现注塑工艺参数的多响应优化。优化结果为注射时间10s,熔体温度256.9697℃,模具温度35℃,保压压力80.5455%,保压时间8s。通过优化后的工艺进行生产,发现车窗装饰板上表面高亮光洁,且无熔接痕、缩孔、飞边等成型缺陷,验证了试验方案的合理性。The car window decorative panel was used as the research object.four gate schemes were formed and simulated by using Moldflow software.The volume shrinkage rate and warping deformation were used as indicators to evaluate the quality of the plan,and the short side large gate plan was obtained as the optimal plan.Taking injection time,melt temperature,mold temperature,holding pressure,and holding time as five factors in factorial design,using Minitab software to design a factorial test plan.Analysis of variance was conducted by using volume shrinkage and warping deformation as response indicators to determine the degree of influence of various factors and their interactions on the response indicators.The P value of the bending term and the main effect diagram were used to judge that the regression equation was nonlinear.Sequential experiment was added to respond to surface design on the basis of factorial design,regression equations for volume shrinkage and warping deformation were obtained.The multi response optimization of injection molding process parameters was achieved with the optimization objectives of a volume shrinkage rate of less than 5.5%and a warping deformation of less than 0.5 mm.The optimization results are as follows:injection time of 10 s,melt temperature of 256.9697℃,mold temperature of 35℃,holding pressure of 80.5455%,and holding time of 8 s.Through production with the optimized process,the surface of the car window decorative panel is bright and smooth,and there are no welding marks,shrinkage holes,flash and other molding defects,which verifies the rationality of the test plan.

关 键 词：车窗装饰板 体积收缩率 翘曲变形量 析因设计 方差分析 响应曲面设计 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]