Due to the relatively high sealing requirements of some aluminum alloy die-casting parts of automobile engines

complex internal structures with uneven wall thickness often cause air leakage of such parts

resulting in poor quality parts. The improvement of the quality of the filter in an automobile engine was carried out as an example

aiming to reduce the shrinkage and porosity in the defect area of the casting. The virtual test design was carried out for the modification of the gating system and cooling system. Using computer calculations

the simulated results of the original design and the modified design were compared to obtain a solution to the defect. After on-site trials of die-casting trials and leakage detection

the modified scheme has obvious effects on improving shrinkage and porosity defects

and the internal quality of parts was significantly improved

and the stability of part quality was guaranteed.