摘要
根据球铁件凝固原理，对常用温砂铸型中制造球铁件（模数在4.8mm－25mm之间），用计算机完成控制压力胃口的设计，流程框留适于各工厂和车间之用．
Based upon the principle of sodidification for Ductile Iron castings, the paper suggests employing a computer to design pressure control risers. They are currently used for producing ductile iron castings in green sand molds (the modulus is between 4. 8-25mm). The program flow chart is useful for every factories and plants.
