Shrinkage-proof pouring system for valve cover

A shrinkage-proof gating system for a valve cover belongs to the technical field of sand mold casting and comprises a main pouring gate and a plurality of branch pouring gates connected with the main pouring gate, each branch pouring gate is positioned between two valve cover lower cores, two sides of the bottom of each branch pouring gate are respectively connected with a hot junction of the bottom of the corresponding valve cover lower core through an inner pouring gate, and the inner pouring gates are communicated with the main pouring gate. The utility model has the beneficial effects that the valve cover is fed by changing the iron feeding position and combining with the feeding head, so that the shrinkage cavity phenomenon at the hot junction of the valve cover is eliminated, and the sand casting efficiency and forming quality of the valve cover are improved. 一种阀盖防缩孔浇注系统，属于砂型铸造技术领域，该阀盖防缩孔浇注系统，包括主浇道及与之相连的多个分支浇道，每个分支浇道位于两个阀盖下芯之间，每个分支浇道的底部两侧分别通过内浇道与对应的阀盖下芯的底部热结处相连，本实用新型的有益效果是，本实用新型通过改变进铁位置并结合补缩冒口对阀盖进行补缩，消除