AN APPARATUS FOR PREVENTING THE CONTAMINATION OF CASTING ROLL AND THE BULGING OF STRIP IN TWIN ROLL STRIP CASTER

An apparatus for preventing bulging of both edges of a strip while preventing contamination of a roll surface in a twin roll strip caster including a meniscus shield ( 5 ) and a plurality of weirs ( 12 ). The apparatus comprises: first chambers ( 60 ) arranged at both sides of the meniscus shield ( 5 ) in a longitudinal direction parallel to the casting roll ( 1 ) and having inlet and outlet ports for non-oxidizing gas; second chambers ( 80 ) each assembled to an underside in each of the first chambers ( 60 ) in a communicating fashion for receiving non-oxidizing gas from the first chambers ( 60 ), and including a plurality of holes ( 81 ) formed in an inclined face thereof corresponding to an outer peripheral face in each of the casting rolls ( 1 and 1 a) in a longitudinal direction of the each casting roll ( 1 or 1 a); and passages S formed between the meniscus shield ( 5 ) and the second chambers ( 80 ) and reaching the gas outlet ports of the first chambers for allowing contaminated gas containing evaporated metal components and non-oxidizing gas injected from the second chambers ( 80 ) to be outwardly exhausted.