摘要
以汽车雾灯灯罩为研究对象,利用Moldex3D软件进行注塑成型模拟。针对注塑过程中出现的翘曲变形和体积收缩率缺陷,以熔体温度、模具温度、保压时间、冷却时间、保压压力为因素设计正交试验,并基于灰色关联分析对成型工艺参数进行优化。通过灰色关联度值的极差分析,得到各工艺参数对灰色关联度值的影响程度排序为:熔体温度>模具温度>冷却时间>保压时间>保压压力。最佳工艺参数组合为:熔体温度280℃,模具温度80℃,冷却时间22 s,保压时间7 s,保压压力155 MPa。与默认参数相比,优化后的Z方向翘曲变形改善了49.2%,体积收缩率改善了26.1%。将最优工艺组合进行实际试模验证,结果表明:采用灰色关联理论分析能够得到相对较好的优化效果,可以有效提高产品的成型质量。
Moldex3D software was used to simulate injection molding using automotive fog lampshades. Aiming at the defects of warpage deformation and volume shrinkage in the injection molding process, orthogonal tests were designed based on the factors of melt temperature, mold temperature, holding time, cooling time and holding pressure, and the molding process parameters were optimized based on gray correlation analysis. Through the range analysis of the gray correlation value, the influence degree of each process parameter on the gray correlation degree value is sorted as: melt temperature>mold temperature>cooling time>holding time>holding pressure. The optimal combination of process parameters is: melt temperature 280 ℃, mold temperature 80 ℃, cooling time 22 s, holding time 7 s, holding pressure 155 MPa. Compared with the default analysis, the optimized Z warpage deformation is improved by 49.2% and the volume shrinkage is improved by 26.1%. The results show that the gray correlation theory analysis can obtain a relatively good optimization effect, which can effectively improve the molding quality of the product.
作者
周纪委
王明伟
张文超
叶星辉
张宏伟
于峻伟
ZHOU Ji-wei;WANG Ming-wei;ZHANG Wen-chao;YE Xing-hui;ZHANG Hong-wei;YU Jun-wei(School of Mechanical Engineering and Automation,Dalian Polytechnic University,Dalian 116034,China;Zhejiang Kaihua Mould Co.,Ltd.,Taizhou 318020,China)
出处
《塑料科技》
CAS
北大核心
2022年第12期74-79,共6页
Plastics Science and Technology
关键词
汽车雾灯灯罩
正交试验
灰色关联分析
工艺优化
翘曲变形
体积收缩率
Automotive fog lamp shade
Orthogonal test
Gray correlation analysis
Process optimization
Warping deformation
Volume shrinkage
