According to the structural characteristics of the filter housing

the die casting process was designed.The Flow-3 Dsoftware was used to simulate the die casting process

and position of the defect was predicted based on the distribution of the entrained air.The simulated results of the initial scheme reveal that there exist more entrained air in the middle and both ends of the cavity

resulting in defects such as blowholes and shrinkage porosity.It is judged by the temperature field distribution that the solidification mode of the die casting belongs to solidified layer by layer

indicating the reasonable filling process.Through adjusting the shape and position of the gating system

the ability of the over-flowing slots to collect entrained air was enhanced.The results reveal that the entrained air in the filter housing is reduced significantly

and the defects are eliminated

meeting production requirements.