PURPOSE: To cast simultaneously plural steel ingots having different weights in a bottom running method of one molding board and one charging pipe by interposing base plates having different thickness between a molding board provided with plural riser ports and casting molds.
CONSTITUTION: Plural riser ports 3 are disposed via a runner 2 to a molding board 1, and a charging pipe 6 is erected on a charging board 5 in the central part thereof. Base plates 7a, 7b, 7c, 7d are interposed between the board 1 and casting molds 4 and the thicknesses Da, Db, Dc, Dd thereof are made respectively different. When a molten metal is charged through the pipe 6, the height of the molten steel F in the respective molds 4 is the same but since the plates 7aW7d having the respectively different thicknesses DaWDd are disposed to the molds 4, the base levels of the molds 4 are different and the amts. of the molten steel F in the molds 4 are different. Steel ingots having different weights are thus cast simultaneously.
TANAKA YUKIO
DOI SADASHI
