内浇道工艺设计对灰铸铁汽缸体铸件质量的影响

Effect of Ingate Layout on Casting Quality of Gray Iron Cylinder Blocks

采用中注式浇注系统、卧浇、一箱两件的铸造工艺方案,并根据大孔出流及金属凝固学理论设计布置内浇道,解决了中小型灰铸铁汽缸体气孔、砂眼缺陷及本体抗拉强度分散度大的问题。实践表明:在每个轴承座部位开设双层内浇道的工艺,生产出的缸体质量和性能最佳。

The casting process design of gray iron cylinder blocks was carried out by adopting the parting-line gating system, horizontal pouring and one box with two parts, and laying out bilayer ingate at each bearing seat based on the theory of large orifice discharge and metal solidification. The problems of blowhole, sand inclusion defects and large dispersion for tensile strength of small and medium sized gray cast iron cylinder blocks were solved. Practice shows that the casting process of laying out bilayer ingate at each bearing seat makes the quality and performance of the produced cylinder blocks optimal.