汽车线束支架注塑工艺优化设计

Optimization Design of Injection Process of Automobile Wire Bracket

通过Moldflow软件分析汽车线束支架的注塑成型过程,以两个安装孔的轴偏移量为研究目标,设计正交试验分析注射速度、熔体温度、模具温度、保压压力和v/p切换体积对轴偏移量的影响。初始工艺下Moldflow分析结果显示:两个安装孔的轴线偏移量分别为1.356 mm(I)和1.473 mm(II),不满足设计要求。正交试验优化的工艺参数为:注射速度85%,熔体温度260℃,模具温度60℃,保压压力55 MPa,v/p切换体积99%。优化工艺下Moldflow分析得到轴偏移量I为0.997 mm,轴偏移量II为0.891 mm,优化效果明显,均满足设计指标。试模产品外观状态良好,安装孔轴偏移量满足要求,产品可正常安装,验证优化工艺的合理性。

The injection molding process of the automobile beam bracket was analyzed by Moldflow software. Taking the axial offset of the two mounting holes as the research target, the orthogonal test was designed to analyze the influence of injection speed, melt temperature, mold temperature, holding pressure and v/p switching volume on the axial offset.Moldflow analysis results under the initial process show that the axial offsets of the two mounting holes are 1.356 mm(I)and 1.473 mm(II), respectively, which do not meet the design requirements. The optimized process parameters are as follows: injection speed 85%, melt temperature 260 ℃, mold temperature 60 ℃, holding pressure 55 MPa, v/p switching volume 99%. Under the optimized process, Moldflow analysis shows that the axial offset I is 0.997 mm, and the axial offset II is 0.891 mm. The optimization effect is obvious, which meets the design indexes. The appearance of the trial-mold product is good, and the axial offset of the mounting hole meets the requirements. The product can be installed normally to verify the rationality of the optimization process.