The function of the pouring system

The function of the pouring system is mainly to control the speed at which the molten metal fills the mold and to control the filling time of the mold, to ensure the smoothness of the molten metal into the mold, reduce the flow of liquid injection, and cause erosion to the mold during pouring At the same time, it prevents other impurities from flowing into the cavity, does not bring in gas during the pouring process, and makes the cooling time of the casting meet the requirements of the solidification standard as much as possible. The source of the parameters of the gating system is mainly based on the area of ​​the inner gate and the total area of ​​the horizontal gate and the area of ​​the straight gate. The open type and the closed type of the pouring system are mainly selected by the above-mentioned area ratio. The calculation standard for the cross-sectional area is based on the area ratio of the pouring liquid flow pouring vertical contact. When the gate area is minimized in the president, the pouring system will fill up the molten metal in a short time. The pouring and filling in a short time provides time isolation for the entry of impurities, and there is not enough time for impurities Into the filling container, so this method is also called closed pouring. It has a wide range of applications and is generally preferred. When the mouth of the container receiving the pouring is smaller than the area of ​​the pouring liquid column, this pouring process will make the molten metal pouring unable to fully fill the pouring system in a short time, so this pouring method is also called an open pouring system, generally the system Mainly used in special processes.