Taking a car dashboard for example,gating system and cooling systen of the hot runner sequential-valve for the dashboard are designed.Orthogonal optimization experimental method and simulation analysis software Moldflow were adapted.Weld line and warpage value,the two main indexes which affect the moulding quality of dashboard,are simulated and optimized in different sequence-valve opening time and process parameters.By range analysis of this two indexes,the degree of influence caused by open time,melt temperature,packing pressure and packing time of each sequence-valve on weld line and warpage value is determined.Using the integrated balance method,finally the best opening time and combination process parameters are achieved.Test results show that there are no obvious weld line on surface of parts,and warpage value meets the assembly requirements.%以某汽车仪表盘为例,设计了仪表盘的热流道顺序阀浇注系统和冷却系统.运用正交优化试验法结合Moldflow模拟分析软件,在不同顺序阀的开启时间和工艺参数条件下,对影响仪表盘注射成型质量的熔接痕和翘曲值标进行模拟优化,通过对这2个指标的极差分析,确定各顺序阀的开启时间和熔体温度、保压压力、保压时间对熔接痕和翘曲值的影响程度,并运用综合平衡法,综合评判最终获取最佳阀开启时间和组合工艺参数.试模结果表明,制件表面无明显熔接线且翘曲值符合装配要求.
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