Pulling-up-type continuous casting method and pulling-up-type continuous casting apparatus

Abstract

A pulling-up-type continuous casting method according to an aspect of the present invention includes disposing a shape defining member ( 102 ) above a molten-metal surface of molten metal (M 1 ) held in a holding furnace ( 101 ), the shape defining member ( 102 ) being configured to define a cross-sectional shape of a cast-metal article (M 3 ) to be cast, submerging a starter (ST) into the molten metal (M 1 ) while making the starter (ST) pass through the shape defining member ( 102 ), and pulling up the molten metal (M 1 ) by pulling up the starter (ST) while making the molten metal (M 1 ) pass through the shape defining member ( 102 ) after a temperature of the shape defining member ( 102 ) reaches a predetermined reference temperature. The reference temperature is equal to or higher than a solidification completion temperature of the molten metal (M 1 ).

1 - 11 . (canceled) 
     
     
         12 . A pulling-up-type continuous casting method comprising:
 disposing a shape defining member above a molten-metal surface of molten metal held in a holding furnace, the shape defining member being configured to define a cross-sectional shape of a cast-metal article to be cast;   submerging a starter into the molten metal while making the starter pass through the shape defining member; and   pulling up the molten metal by pulling up the starter while making the molten metal pass through the shape defining member after a temperature of the shape defining member reaches a predetermined reference temperature, wherein   the reference temperature is equal to or higher than a solidification completion temperature of the molten metal and   wherein the temperature of the shape defining member is measured by a contact-type temperature sensor fixed on a top-side main surface of the shape defining member.   
     
     
         13 . The pulling-up-type continuous casting method according to  claim 12 , wherein the reference temperature is equal to or higher than a solidification start temperature of the molten metal. 
     
     
         14 . The pulling-up-type continuous casting method according to  claim 12 , wherein in the step of disposing the shape defining member, a bottom-side main surface of the shape defining member is brought into contact with the molten-metal surface. 
     
     
         15 . The pulling-up-type continuous casting method according to  claim 12 , wherein
 the shape defining member comprises a heating unit that heats the shape defining member itself, and   in the pulling-up the molten metal, the shape defining member is heated by the heating unit until the temperature of the shape defining member reaches the reference temperature.   
     
     
         16 . A pulling-up-type continuous casting apparatus comprising:
 a holding furnace that holds molten metal;   a shape defining member disposed above a molten-metal surface of the molten metal, the shape defining member being configured to define a cross-sectional shape of a cast-metal article to be cast;   a temperature sensor that measures a temperature of the shape defining member;   a pulling-up machine that pulls up the molten metal by pulling up a starter while making the molten metal pass through the shape defining member; and   a casting control unit that starts the pulling-up by the pulling-up machine after the temperature of the shape defining member measured by the temperature sensor reaches a predetermined reference temperature, wherein   the reference temperature is equal to or higher than a solidification completion temperature of the molten metal and   wherein the temperature sensor is a contact-type temperature sensor fixed on a top-side main surface of the shape defining member.   
     
     
         17 . The pulling-up-type continuous casting apparatus according to  claim 16 , wherein the reference temperature is equal to or higher than a solidification start temperature of the molten metal. 
     
     
         18 . The pulling-up-type continuous casting apparatus according to  claim 16 , wherein the shape defining member is disposed so that its bottom-side main surface is in contact with the molten-metal surface. 
     
     
         19 . The pulling-up-type continuous casting apparatus according to  claim 16 , wherein the shape defining member comprises a heating unit that heats the shape defining member itself. 
     
     
         20 . The pulling-up-type continuous casting apparatus according to  claim 19 , wherein the heating unit is disposed on a periphery of a molten-metal passage section through which the molten metal passes in the shape defining member. 
     
     
         21 . The pulling-up-type continuous casting apparatus according to  claim 19 , wherein the casting control unit instructs the heating unit to heat the shape defining member until the temperature of the shape defining member measured by the temperature sensor reaches the reference temperature.