ProCAST software was used to simulate the mold filling and solidification process based on a theoretically designed gating system for obtaining a reasonable camshaft cap die-casting mold. The results show that the 6-runner scheme can result in multi-flow confluence

causing gas entrapment and shrinkage defects

while a 5-runner scheme can reduce the gas and internal porosity in die castings.The locations and volume of the pores were predicted by simulation of solidification

shrinkage holes（porosities）

and then an optimized scheme removing an overflow groove was proposed

which could significantly shorten the solidification time. X-ray inspection and cutting surface of the key position of the die-cast castings show that absence of shrinkage hole in the product can be observed. The efficiency of mold design can be improved by die-casting simulation

and the production efficiency as well as product quality can be enhanced though pouring system optimization.