The two material injection mould process and the structure features of snap-fit were introduced, the mould was designed. In this mould, some special structures, such as delayed mold core pulling, ejection mechanism in order, and hot runner system combined with the general structure of gating system in second injection were used to solve the problem of rotation for cavity. This mould design would improve the bond strength of the two kinds of material and improve the productivity.%介绍双物料多模注射成型工艺及分析汽车卡扣的结构特点,并根据汽车卡扣的结构特点设计了双物料注射成型模具.针对双物料多模注射成型工艺“旋转换腔”的难点,采用延时抽芯和顺序开模机构,二次注射浇注系统采用热流道与普通浇注系统相结合的结构.该模具设计能够较好地改善两种物料的粘结强度、提高生产率.
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