Abstract text

(Problems to be Solved) This invention provides a method that enables molten metal that flows from ladles to drop precisely into a sprue of a mold.

(Means to Solve the Problems) The input voltage that is to be supplied to each of the servomotors is controlled so that the molten metal that flows from the ladle drops precisely into a sprue of a mold, the respective servomotors tilting the ladle, moving the ladle backward and forward, and moving the ladle up and down, wherein the method comprises:

• obtaining a mathematical model covering the locus of the positions where the molten metal that flows from the ladle drops,
• solving the inverse problem of the mathematical model thus obtained;
• estimating the position where the molten metal drops from the term for the estimated flow of the molten metal and the term for the estimated position where the molten metal drops; and
• processing the data on the estimated position where the molten metal drops, whereby the pouring of the molten metal is effected by determining the electrical voltages to be supplied to the respective servomotors, which tilt the ladle, move the ladle backward and forward, and move the ladle up and down, and controlling the three motors based on the electrical voltages thus determined.