基于灰色关联理论的汽车门内板注塑工艺多目标优化设计

Multi-Objective Optimization for Injection Process of Car Door Inner Panel Based on Grey Relation Theory

以汽车门内板为研究对象,采用正交试验法选取熔体温度、模具温度、冷却时间、保压时间、保压压力为试验主要因素,运用moldflow软件研究了工艺参数对塑件翘曲变形量和体积收缩率的影响规律,建立了参数与塑件质量的灰色关联度模型,获得了同时满足翘曲变形和体积收缩率最小的组合工艺参数,将最优工艺参数应用到实际生产中,得到了符合要求的产品。

Taking the car inner panel as research object, orthogonal method was used in the research and melt temperature, mold temperature, cooling time and pack pressure as well as pack time were selected as the main experiment factors. The effects of process parameters on warpage and volume shrinkage were studied by moldflow software. Then the grey relation model between injection parameters and quality of plastic product was built. The combination process parameters of the minimum warpage and volume shrinkage were obtained. Finally, the optimal combination parameters were used into the practical production,and the qualified products were obtained.