The function of the casting system is mainly to control the filling speed of the molten metal mold, to control the filling time of the mold, to ensure the uniformity of the molten metal mold, to reduce the injection flow and to reduce mold wear. pouring. Since the gas is impermeable during casting, the cooling time of the casting can best meet the requirements of the hardening standard. The source of the access control system parameters is mainly based on the interior door area, the total area of the horizontal door and the area of the straight door. The open and closed types of door systems are selected mainly by the ratio of the above area. The standard for calculating the cross-sectional area is based on the ratio of the vertical contact area of the pouring fluid flow. If the president's door area is kept to a minimum, the door system will be filled with molten metal in a short time. Short-term packing and filling temporarily isolate the mixture, and this method is called closed filling because there is not enough time to put the mixture in the filling container. It has a wide range of applications and is often preferred. If the mouth of the filler tank is smaller than the area of the filler liquid column, this casting process will make it impossible to completely fill the molten metal filling system in a short time. Therefore, this method of packaging is called General system and is usually used in a special process. Therefore, this method is called closed casting. It has a wide range of applications and is often preferred. If the mouth of the filler tank is smaller than the area of the filler liquid column, this casting process will make it impossible to completely fill the molten metal filling system in a short time. Therefore, this method of packaging is called General system and is usually used in a special process. Therefore, this method is called closed casting. It has a wide range of applications and is often preferred. If the mouth of the packing tank is smaller than the area of the packing column, this casting process will make it impossible to completely fill the packing system with molten metal in a short time. Therefore, this method of packaging is called General System and is usually used in a special process