Squeeze casting process of the air conditioning compressor front cover was simulate by using ProCast software to predict entrapment-gas and shrinkage defects in the filling process with the pouring temperature of 660℃

the mold preheating temperature of 200℃and the pouring velocity of 150mm/s as well as the squeezing pressure of 70MPa.Liquid height difference in filling process can be narrowed through decreasing filling velocity.Entrapment gas in the castings can be eliminated with filling velocity of 100mm/s.With increasing in pressure and in die preheating temperature

shrinkage porosity is reduced.However

shrinkage porosity area occurs in the center after adjusting process parameters. Through imposing a secondary pressure on the central part

shrinkage porosity is eliminated.