针对 EPS发泡模型对真空消失模铸造工艺生产球墨铸铁管件质量和生产效率的影响 ,分析了 T型管件承插口的结构特征 ,研制了 T型承口一次整体发泡成形模具 ,并详细介绍了旋转抽芯模具的结构和设计原理 ,给出了理论计算公式 ,提出了制模工艺流程。批量应用效果表明 ,该模具提高制模生产效率 4倍以上 ,并大大降低了模型的密度 ,改善了铸件的外观质量和承口的几何精度 ,提高了材料利用率 ,降低了水气消耗。 In view of the influence of EPS foaming model on the quality and production efficiency of ductile iron pipe produced by vacuum EPC process, the structural characteristics of T-shaped pipe socket are analyzed, and a T-type socket overall foaming forming mold is developed. The structure and design principle of the rotary core pulling mold are given, the theoretical calculation formula is given and the molding process flow is proposed. The batch application results show that the mold improves the mold production efficiency by more than 4 times and greatly reduces the density of the model, improves the appearance quality of the casting and the geometric precision of the socket, improves the material utilization rate and reduces the water vapor consumption.