According to the structural characteristics of the aluminum outer sleeve of the water-cooled end cover of locomotive motor

the casting process was designed and optimized. Numerical simulation results show that through setting the appropriate annular riser

blind risers and cold iron in the hot spot of the castings

the problem of shrinkage porosity in castings was improved effectively. Then the casting process was optimized. When the annular riser height was reduced to 90 mm

and the blind riser height was reduced to 80 mm

the process yield of castings reaches 51. 6%

improved by 14. 2% compared with that of un-optimized ones. The optimized casting process was applied to practical production with desirable quality.