六、设计良好的补缩次序: 绝大多数金属和合金在凝固时均产生收缩。设计时应考虑使不同厚度的断面顺序冷却,并将冒口安置在适当的部位,以利于消除凝固时补缩不足的现象。七、正确设置内部筋板的厚度比例在一些铸件中,由于泥芯复杂,内部被一些筋板分隔成若干部分。这些筋板较之表面部分的断面冷却缓慢。于是,这就造成了它们之间的不同应力特性。为了消除这种现象,一个较好的办法是,使内部筋板的厚度减小到为 Sixth, a well-designed order of feeding: the vast majority of metals and alloys are in the solidification shrinkage. Design should take into account the order of the different thickness of the cooling section, and riser placed in the appropriate parts, in order to facilitate the elimination of coagulation inadequate contraction phenomenon. Seven, the correct set of the proportion of the thickness of the internal ribs In some castings, due to the complexity of the mud core, the internal ribs were divided into several parts by some. These tendons cool more slowly than the cross-section of the surface. As a result, this creates different stress characteristics between them. In order to eliminate this phenomenon, a better way is to reduce the thickness of the internal ribs to