In this paper, the arrangement of cavities, the dimension calculation of sprues and gates and the method of mold-testing for a special hooks multi-cavitis plastic injection mold are introduced. 本文以塑料扣码为例介绍了多腔注射模浇注系统设计中型腔的排布、非平衡排布时欲达到同时充满型腔浇口尺寸的计算及调试。