Method of and molten metal feeder for continuous casting

Abstract

A feeder for delivery of molten metal into a mold formed between confronting casting surfaces of a continuous casting machine. The feeder comprises a projecting nozzle tip having at least a lower wall provided with a molten metal-contacting inner surface, a generally flat outer surface and an end surface at an outer extremity of the tip extending between the inner and outer surface. The inner surface is generally flat and preferably slopes towards the outer surface considered in a direction moving towards the extremity of the tip at an angle of slope of no more than 8 degrees. The end surface is generally flat and extends from the inner surface to the outer surface at an angle in the range of 15 to 80 degrees relative to the inner surface in a direction away from the extremity of the tip. The feeder casts a metal sheet article having reduced surface defects caused by rupture of the metal oxide during casting.

1 . A feeder for delivery of molten metal into a mold formed between confronting casting surfaces of a continuous casting machine, the feeder comprising: 
 a nozzle having a projecting tip including at least one wall provided with a molten-metal-contacting inner surface, an outer surface, and an end surface at an outer extremity of the tip extending between the inner and outer surfaces,    wherein the inner surface and the end surface interconnect at said outer extremity of said tip and form an a cut-back angle selected from a range of 15 to 80 degrees.    
   
   
       2 . The feeder of  claim 1 , wherein said cut-back angle is selected from a range of 15 to 75 degrees.  
   
   
       3 . The feeder of  claim 1 , wherein said cut-back angle is selected from a range of 30 to 70 degrees.  
   
   
       4 . The feeder of  claim 1 , wherein the tip has two of said walls aligned with each other with said metal-contacting inner surfaces confronting each other across a metal-conveying channel.  
   
   
       5 . The feeder of  claim 4 , wherein said walls of said tip diverge from each other in a direction extending towards said outer extremity.  
   
   
       6 . The feeder of  claim 5 , wherein said walls diverge from a longitudinal axis of the tip at an angle of about 8 degrees.  
   
   
       7 - 15 . (canceled)