Sealing device for twin roll caster

Abstract

A sealing device for a main roller coaster including a transition piece positioned above a melt pool formed between chilled rolls, rotatable cylindrical brushes extending axially of the rolls and each abutting against an outer periphery of the corresponding roll all over an axial length thereof on a side away from the pool and below the transition piece, first cowlings each covering the roll in between the transition piece and the brush, second cowlings each surrounding a portion of the brush not in contact with the roll, third cowlings each covering the roll below the brush and outlets for feeding sealing gas to between the transition piece and the rolls, the sealing gas from the outlets filling up to outlet portions of the third cowlings.

1 . A sealing device for a twin roll caster, comprising:
 a transition piece positioned above a melt pool formed between chilled rolls,   rotatable cylindrical brushes extending axially of the rolls and each abutting against an outer periphery of the corresponding roll all over axial length thereof on a side away from the pool and below the transition piece,   first cowlings contiguous with the transition piece and each covering the corresponding roll in between the transition piece and the corresponding brush,   second cowlings contiguous with said first cowlings and each surrounding a portion of the brush not in contact with the roll,   third cowlings contiguous with said second cowlings and each covering the roll below the brush, and   outlets for feeding sealing gas in between the transition piece and the rolls.   
   
   
       2 . A sealing device for a twin roll caster as claimed in claim I wherein each of the brushes is set to be rotated in a same direction, looking in a direction of axis thereof, of that of rotation of the roll against which the brush abuts. 
   
   
       3 . A sealing device for a twin roll caster as claimed in  claim 1  wherein the sealing gas from the outlet and flowing between the first cowling and the roll is set to have a velocity exceeding an absolute value of a peripheral velocity of the roll. 
   
   
       4 . A sealing device for a twin roll caster as claimed in  claim 2  wherein the sealing gas from the outlet and flowing between the first cowling and the roll is set to have a velocity exceeding an absolute value of a peripheral velocity of the roll.