PURPOSE: To act effectively covering materials and to obtain defectless casting in a bottom running ingot making method by setting preliminarily powder covering agents and a plate-shaped covering material for a molten metal in a casting mold.
CONSTITUTION: A plate-shaped covering material for a molten metal consisting of an inside layer 3 of the plate-shaped covering material for the molten metal and a surface coating layer 12 of the plate-shaped covering material for the molten metal is suspended from the upper part of a riser flask 1 by means of a rope 11 in the casting mold 2 on a molding board 5. A powder covering agent 4 is put in a bag 13 and plural pieces of such bags are suspended from the plate- shaped covering material for the molten metal by means of ropes 11. A molten metal 8 is thereupon charged from the charging port 10 in the bottom of a ladle 9 through a charging pipe 7 and a runner 6 into the mold 2. As a result, the sepn. of the casting mold and the molten metal is made easy and since the powder covering agents are interposed, the oxidation of the surface of the molten metal is prevented.
UCHIDA TETSUO
AKAHORI KIMIHIKO
