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

Abstract

An up-thawing continuous casting apparatus includes a holding furnace that holds molten metal; a shape determining member that is arranged near a molten metal surface of a casting held in the holding furnace, and that determines a sectional shape of the molten metal by the molten metal passing through the shape determining member; a cooling portion that cools and solidifies the molten metal that has passed through the shape determining member; and a molten metal cooling portion that lowers a temperature of the molten metal held in the holding furnace.

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;   a cooling portion that cools and solidifies the molten metal that has passed through the shape determining member; and   a molten metal cooling portion that lowers a temperature of the molten metal held in the holding furnace.   
     
     
         2 . The up-drawing continuous casting apparatus according to  claim 1 , wherein the molten metal cooling portion is provided directly below the shape determining member. 
     
     
         3 . The up-drawing continuous casting apparatus according to  claim 1 , further comprising:
 an actuator that moves the molten metal cooling portion in a top-bottom direction inside the holding furnace.   
     
     
         4 . The up-drawing continuous casting apparatus according to  claim 1 , wherein cooling gas passes through an inside of the molten metal cooling portion. 
     
     
         5 . The up-drawing continuous casting apparatus according to  claim 1 , wherein the molten metal cooling portion is made of ceramic. 
     
     
         6 . The up-drawing continuous casting apparatus according to  claim 1 , further comprising:
 a partition wall that surrounds the molten metal; and an ambient temperature regulating portion that regulates a temperature of an atmosphere surrounded by the partition wall.   
     
     
         7 . An up-drawing continuous casting method that uses a casting apparatus having a shape determining member that determines a sectional shape of a casting, a holding furnace that holds a molten metal, and a molten metal cooling portion provided in the holding furnace, the up-drawing continuous casting method comprising:
 arranging the shape determining member near a molten metal surface of the molten metal held in the holding furnace;   lowering a temperature of the molten metal held in the holding furnace, with the molten metal cooling portion;   passing the molten metal that has been lowered in temperature 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 molten metal cooling portion is provided directly below the shape determining member. 
     
     
         9 . The up-drawing continuous casting method according to  claim 7 , further comprising:
 moving the molten metal cooling portion in a top-bottom direction inside the holding furnace.   
     
     
         10 . The up-drawing continuous casting method according to  claim 1 , wherein lowering the temperature of the molten metal is done by leading cooling gas into the molten metal cooling portion. 
     
     
         11 . The up-drawing continuous casting method according to  claim 1 , wherein the molten metal cooling portion is made of ceramic. 
     
     
         12 . The up-drawing continuous casting method according to  claim 1 , further comprising:
 surrounding the molten metal with a partition wall; and   regulating a temperature of an atmosphere surrounded by the partition wall.   
     
     
         13 . 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 and solidifies the molten metal that has passed through the shape determining member with a starter,   wherein the starter has a cooling mechanism that is integrated with the starter.   
     
     
         14 . The up-drawing continuous casting apparatus according to  claim 13 , wherein the cooling mechanism includes a pipe that is attached to the starter and into which coolant is introduced. 
     
     
         15 . The up-drawing continuous casting apparatus according to  claim 13 , wherein the cooling mechanism is the starter itself that is formed by a pipe into which coolant is introduced. 
     
     
         16 . An up-drawing continuous casting method that uses a casting apparatus having a shape determining member that determines a sectional shape of a casting, a holding furnace that holds a molten metal, a starter, and a cooling mechanism that is integrated with the starter, the up-drawing continuous casting method comprising:
 arranging the shape determining member near a molten metal surface of the molten metal held in the holding furnace;   passing the molten metal through the shape determining member and drawing up the molten metal with the starter;   cooling and solidifying the molten metal that has passed through the shape determining member and been drawn up; and   cooling the starter with the cooling mechanism.   
     
     
         17 . The up-drawing continuous casting method according to  claim 16 , wherein the cooling mechanism is formed by attaching a pipe to the starter and introducing coolant into the pipe. 
     
     
         18 . The up-drawing continuous casting method according to  claim 16 , wherein the cooling mechanism is formed by introducing coolant into the starter itself that is formed by a pipe.