Reasonable gating system design is a key link to ensure the quality of castings, which can effectively guide the filling and solidification of the melt and eliminate unfavorable factors [29]. Common gating systems include: open, semi-closed and closed. In the open gating system, the filling speed of the melt entering the cavity is small, the filling is stable, and the impact of scouring is low; but the melt filling type The speed of the cavity is slow. During the filling process of the runner, the melt is prone to turbulent flow, and the surface oxide film is easily broken, thus entering the cavity and affecting the quality of the casting. The closed gating system can ensure a faster filling speed, is conducive to the floating and removal of inclusions, has better slag resistance, and can also better prevent gas from being involved in the melt filling process; but its inner gate The filling pressure at the place is high, and the melt mostly fills the cavity at a high speed in a spray state, which is easy to cause splashing, thereby forming more secondary oxidation slag inclusions and other defects. Therefore, when designing the gating system, it is necessary to focus on the shape, structure and material properties of the casting, and select a reasonable gating system in combination with the principles of the casting forming process. Aluminum alloy materials generally use an open gating system design in the gravity casting process.