基于Moldflow探究孔型结构对熔接线质量的影响及案例解析  

Influence of Hole Structures on Welding Line Quality Based on Moldflow and Case Analysis

作　　者：林颖 胡光良 王笑生 陈绪波 余远丽 LIN Ying;HU Guangliang;WANG Xiaosheng;CHEN Xubo;YU Yuanli(Zhejiang Changjiang Automotive Electronics Co.,Ltd.,Wenzhou 325000,China;Zhejiang Dongfang Polytechnic,Wenzhou 325000,China)

机构地区：[1]浙江长江汽车电子有限公司,浙江温州325000 [2]浙江东方职业技术学院,浙江温州325000

出　　处：《塑料工业》2024年第7期105-111,118,共8页China Plastics Industry

基　　金：浙江省教育厅一般项目(Y20235301)。

摘　　要：为了提高汽车内饰整体的高级感和科技感,更多的电镀零件被开发应用。现汽车内饰中双色电镀镭雕类产品多半采用双色注塑电镀后再镭雕的制造工艺,其在外观、功能和成本上存在某些不足,故引进了双色免镭雕电镀技术,而如何保证双色免镭雕电镀件的外观质量,一直以来都是各制造商需要面临并解决的共性问题。本文针对外观熔接线缺陷问题,基于Moldflow软件构建了系列简化模型,对不同孔型结构的熔接线成型质量的影响展开深入研究,通过对结果的分析对比,发现塑料熔体在尖锐结构处汇合形成的熔接线V型角更大,V型缺口更小,熔接线长度更短,成型质量更佳。基于此研究结论,以某车型中的双色电镀免镭雕P档按键为例,通过调整浇口,优化零件壁厚,增加引流结构,将熔接线优化至P档按键字符尖锐结构处,熔接线V型汇合角增加到125°,V型缺口明显减小,外观熔接线成型质量较好,电镀后满足要求。该案例的成功改善及拓展研究结果对解决外观件熔接线缺陷问题具有实际指导意义和借鉴价值。To improve the overall sense of high quality and technology of automotive interiors,more electroplated parts have been developed and applied.Now,most of the two-color radium electroplating products in automotive interiors are made by the two-color injection moulding electroplating and then radium electroplating,which has some deficiencies in appearance,function and cost.Then two-color radium-free electroplating technology is introduced,and how to ensure the appearance quality of two-color radium-free electroplating parts has always been a common problem that manufacturers need to face and solve.In this paper,for the appearance of welding line defects,a series of simplified models were built based on Moldflow software,and the effects of different hole structures on the quality of welding lines were deeply studied.The results show that the V-shaped angles of the welding lines formed by the confluences of the plastic melt at the sharp structures are larger,the V-shaped notches are smaller,the lengths of the welding lines are shorter,and the quality of the moulding is better.Based on the conclusions of this study,this paper took the two-color radium-free electroplating P-key as the example,the wall thickness of the parts was optimized by adjusting the gate.The welding lines were optimized to the sharp structures of the P-key characters by increasing the diversion structures.The results show that the V-shaped confluence angle of the welding lines is increased to 125°,its V-shaped notch is obviously reduced,the appearance of the welding lines molding quality is better,and the plating quality meets the requirements.The successful improvement of this case and the expansion of the research results have practical guidance significances and reference values for solving the problem of defective welding lines of appearance parts.

关 键 词：MOLDFLOW 熔接线 尖锐结构 汇合角 双色免镭雕 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]