First of all, it is necessary to an

First of all, it is necessary to analyze the structure of the casting and work out a reasonable casting process. 1. Technological analysis of casting structure the technological quality of metal mold casting structure is the prerequisite to ensure the quality of castings and give full play to the advantages of metal mold casting. The reasonable casting structure should follow the following principles: (1) the casting structure should not obstruct the mold output and shrinkage; (2) the thickness difference should not be too large, so as to avoid the great difference of temperature difference between each part, so as to cause the casting shrinkage crack and porosity;