Metallurgical apparatus – With control means responsive to sensed condition – With means responsive to condition of treated material
Reexamination Certificate
2002-12-20
2008-01-29
Kastler, Scott (Department: 1742)
Metallurgical apparatus
With control means responsive to sensed condition
With means responsive to condition of treated material
C164S428000, C164S415000
Reexamination Certificate
active
07323135
ABSTRACT:
An apparatus for controlling gas layer thickness on the surface of casting rolls in a twin roll strip caster includes: a pair of chambers fixedly mounted on both lateral portions of the meniscus shield in a width direction of a strip; blocking units for blocking introduction of pollutants into the molten metal pool, wherein each of the blocking units includes front and rear barrier members which are mounted on each of the chambers and in close contact with an outer periphery of each casting roll and a blower for injecting inert gas toward the outer periphery of each casting roll; operating units for adjusting the thickness and the width of gas layers at both ends of the casting rolls, wherein each of the operating units includes suction lines connected with each chamber to transmit a suction force to ends of each casting roll and a pair of movable plates slidably assembled to both side portions within each chamber for being reciprocated by movable members; and a control unit for controlling the suction force of the suction lines and the movable members by using means for measuring surface conditions and the thickness of the strip. Delayed solidification at strip edges is prevented to improve the grade in shape and yield of the strip.
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Cheong Han-Nam
Choi Ju-Tae
Lee, legal representative Kyung-Ah
Kastler Scott
POSCO
Research Institute of Industrial Science & Technology
The Webb Law Firm P.C.
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