Brake disc casting is a very common type of casting in the production of automotive parts. Yantai, Shandong Province, China is the world's largest base for brake disc casting production and export; The casting process is mainly based on the tidal sand casting process, and most of the tidal sand casting molding lines can meet its casting needs. Casting enterprises will choose the molding line that meets the production demand. Due to the need for dynamic balance processing of castings in the later stage, most enterprises also adopt the horizontal split casting molding line of horizontal pouring method, and the material of castings is mainly gray cast iron 250 standard (HT250);