铸铁件(这里指灰铸铁与球墨铸铁件)的冒口不仅应有恰当的形状和尺寸,还应有合理的安放位置。从传统的顺序凝固原则出发,冒口通常放在铸件的厚壁部位,铸件最高处以及铸件中部热节处,並用由浇口引入的热冒口形式。这种公式般的约束,使人们往往偏重对冒口形状和尺寸的研究,而 Cast iron parts (gray cast iron and ductile iron here) should not only have the correct shape and size, but also have a reasonable place. From the traditional order of solidification principle, the riser is usually placed on the thick-walled parts of the castings, the highest part of the castings and the hot section of the central part of the castings, and is fed by the gate into the form of heat risers. This formulaic constraints, so that people tend to focus on riser shape and size of the study, however