基于Moldflow的汽车仪表板大型塑件注塑模工艺优化

以大型汽车仪表板塑件为例，采用模流分析软件Moldflow分析了多浇口的最佳浇口位置。以翘曲变形量为主要分析指标建立了正交实验方案，通过分析比对获得了最佳的工艺组合。通过模拟分析，发现翘曲变形量过大和表面有熔接痕是主要缺陷。不均匀收缩、取向效应和冷却不均是导致翘曲变形量过大的主要原因。通过采用顺序阀浇口技术、优化相关注射成型工艺参数以及浇注系统和冷却系统的结构、尺寸，基本消除外观表面上的明显熔接痕，翘曲变形量满足企业生产需求，并最终获得了优化的工艺参数和模具结构。结果表明，采用Moldflow对大型塑件进行计算机辅助工程（CAE）分析可大幅提高塑件的成型质量，有效缩短产品的开发周期，节能减排，降低生产成本。

Process optimizationof injection mold for large plastic parts of automobile dashboard based on Moldflow

Taking a large plastic car dashboard as an example， the CAE analysis software Moldflow was used to analyze the optimal gate position of multiple gates. The orthogonal experiment scheme was established with the warpage deformation as a main analysis index， and the optimal process combination was obtained through analysis and comparison. Based on the simulation analysis of the analysis model， the excessive warpage deformation and welding marks on the surface were found to become the main defects. The uneven shrinkage， orientation effect， and uneven cooling were considered as the main reasons for the excessive warpage deformation. Through using a sequential valve gate technology， the gating system， cooling system， and related process parameters were optimized， the obvious weld marks on the appearance surface were basically eliminated， and the amount of warping deformation could meet the production requirements of enterprose. Finally， the optimized process parameters and mold structure were obtained. The research results indicated that the use of Moldflow for the CAE analysis of large plastic parts could effectively shorten the design cycle， improve the molding quality of large plastic parts， and reduce production costs.