针对带有网格的框形薄壁注塑件容易出现缩痕的问题，开展基于缩痕最小的空调面框注塑成型工艺参数优化研究。首先构建空调面框三维几何模型，设计浇道系统和冷却流道，在运用Moldflow数值模拟和四水平正交试验L16(45)的基础上，以注射时间、模具温度、熔体温度、相对保压压力、保压时间为设计变量，采用极差分析和方差分析得到各参数对缩痕指数的影响程度，并获得了最优的工艺参数组合，其缩痕指数降低为2.159%，最后通过注塑成型试验验证该方法的有效性。这为框形薄壁注塑件低成本高质量设计提供了一种新的途径。%Aimed at the problem that the sink marks is easy to appear in the frame thin-wall plastic products with grid,the research on the optimization of injection molding process parameters for air conditioning plane frame based on the minimization of sink indexis was carried out. First,the 3D model of air conditioning plane frame was built,the gating system and cooling flow channel were designed. Based on the use of moldflow simulation and four levels orthogonal experimentL16(45),injection time, mold temperature,melt temperature,relative packing pressure and packing time were designed as variables. The influence of various parameters on the sink mark index were obtained by using the range analysis and variance analysis,and the optimal process parameters combination were obtained,the sink mark index was decreased to 2.159%. Finally the method was confirmed to be effective by using injection molding experiments. It provides a new way of low-cost and high-quality design for the frame thin-wall plastic products.
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