After casting precision casting products mechanical finishing, deburring, edge smooth, rust removal, scale, improve the surface stress.For T6 treatment: improve the mechanical properties, increase the corrosion resistance, improve the processing performance, size stability. Finally tracked hook type shot blasting, shot peening or make precision casting products meet appearance and inner beauty.Aluminum housing on the basis of other aluminum castings production process increased the impregnation process, this process can improve the casting compactness and corrosion resistance.Castings after pouring cooling mold to retrieve, gate and riser, metal burr, feng and line, the development trend of precision casting products is the requirement of castings have better comprehensive performance, higher precision, less allowance and more bright and clean surface.In addition, the requirements of energy saving and the call for society to restore the natural environment is becoming more and more high.