以剪刀架与磁性嵌件的注塑为分析实例,阐述了丙烯腈-丁二烯-苯乙烯共聚物(ABS)材料在嵌入磁性嵌件后注塑中产生的翘曲问题及解决方法;采用Moldflow软件对制品结构、模具结构和成型工艺参数3个方面的影响因素进行了对比分析.结果表明,通过对工艺参数的极差分析以及制品结构、浇口位置的改变分析所得到的数据发现,改变工艺参数翘曲优化程度为15％,改变制品结构翘曲优化程度为53.7％,改变浇口位置翘曲优化程度可达76.5％;改善浇口位置是解决翘曲因素最主要的方法,可以得到远小于翘曲要求的翘曲值.%Taking the injection-molding process of a cutting tool holder with magnetic inserts as a case study,this paper reported an investigation on the warpage defect occurring in injection-molded magnetic inserts by using acrylonitrile-butadiene-styrene copolymer (ABS) resin as a thermoplastic material and also proposed the resolution for this defect.A comparative analysis was conducted by means of Moldflow software for the influence factors derived from part structures,mould structures and process parameters.The results indicated that,through range analysis of process parameters and data analyses of product structures and gate locations,the warpage level could be improved by 15 ％ through optimizing the process parameters,improved by 53.7 ％ through optimizing the part structure,and improved by 76.5 ％ through optimizing the gate location.It was concluded that the optimization of gate location was the optimal method to diminish the warpage defect.
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