Up-drawing continuous casting apparatus and up-drawing continuous casting method

Abstract

An up-drawing continuous casting apparatus includes a holding furnace that holds molten metal, a shape determining member that is arranged near a molten metal surface of the molten metal held in the holding furnace, and that determines a sectional shape of a casting by the molten metal passing through the shape determining member, and a cooling portion that cools the molten metal that has passed through the shape determining member. The shape determining member includes, on a main surface on the molten metal surface side, at least one of a protruding portion that protrudes from the main surface, or a recessed portion that is recessed from the main surface.

1 . An up-drawing continuous casting apparatus comprising:
 a holding furnace that holds molten metal;   a shape determining member that is arranged near a molten metal surface of the molten metal held in the holding furnace, and that determines a sectional shape of a casting by the molten metal passing through the shape determining member, and   a cooling portion that cools the molten metal that has passed through the shape determining member,   wherein the shape determining member includes, on a main surface on the molten metal surface side, at least one of a protruding portion that protrudes from the mail surface, or a recessed portion that is recessed from the main surfaces.   
     
     
         2 . The up-drawing continuous casting apparatus according to  claim 1 , further comprising:
 a molten metal passage portion that is provided in the shape determining member and through which the molten metal passes,   wherein the protruding portion is a first protruding portion that is formed along an edge of the molten metal passage portion.   
     
     
         3 . The up-drawing continuous casting apparatus according to  claim 2 , wherein a gap is provided between the main surface of the shape determining member and the molten metal surface. 
     
     
         4 . The up-drawing continuous casting apparatus according to  claim 2 , wherein the shape determining member has the recessed portion formed at a base of the first protruding portion. 
     
     
         5 . The up-drawing continuous casting apparatus according to  claim 4 , wherein the protruding portion includes a second protruding portion that is provided on the shape determining member, and that protrudes on a side opposite the molten metal passage portion from a tip end of the first protruding portion. 
     
     
         6 . The up-drawing continuous casting apparatus according to  claim 1 , wherein the recessed portion has a triangular sectional shape, and is provided inplurality on the shape determining member. 
     
     
         7 . The up-drawing continuous casting method that uses an up-drawing continuous casting apparatus having a shape determining member that determines a sectional shape of a casting, and a protruding portion or a recessed portion provided on a main surface on a molten metal surface side of the shape determining member, the protruding portion protruding from the main surface and the recessed portion being recessed from the main surface, the up-drawing continuous casting method comprising:
 arranging the shape determining member near a molten metal surface of molten metal;   passing the molten metal through the shape determining member and drawing up the molten metal; and   cooling the molten metal that has passed through the shape determining member and been drawn up.   
     
     
         8 . The up-drawing continuous casting method according to  claim 7 , wherein the shape determining member is provided with a molten metal passage portion through which the molten metal passes, and the protruding portion is a first protruding portion along an edge of the molten metal passage portion. 
     
     
         9 . The up-drawing continuous casting method according to  claim 8 , wherein a gap is provided between the main surface of the shape determining member and the molten metal surface. 
     
     
         10 . The up-drawing continuous casting apparatus according to  claim 8 , wherein the shape determining member has the recessed portion formed at a base of the first protruding portion. 
     
     
         11 . The up-drawing continuous casting method according to  claim 10 , wherein the shape determining member is provided with a second protruding portion that protrudes on a side opposite the molten metal passage side from a tip end of the first protruding portion. 
     
     
         12 . The up-drawing continuous casting method according to  claim 7 , wherein the shape determining member is provided with a plurality of the recessed members each of which has a triangular section shape. 
     
     
         13 . The up-drawing continuous casting apparatus according to  claim 3 , wherein the shape determining member has the recessed portion formed at a base of the first protruding portion. 
     
     
         14 . The up-drawing continuous casting apparatus according to  claim 9 , wherein the shape determining member has the recessed portion formed at a base of the first protruding portion.