Casting metal strip
AssigneeCastrip, LLC
InventorsNikolco S. Nikolovski, Peter A Woodberry, Brett Gray
Life of this patent
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Abstract
Twin roll casting of metal strip (20) by rotation of parallel casting rolls (16) supplied with molten metal through distributor (19a) and delivery nozzle (19b). X-ray scanner (44) continuously scans the thickness of strip (20) to produce a signal which is a continuous measure of thickness variation along the strip due to eccentricities of the casting rolls (16). This signal controls operation of roll drive motors (53) to impose a pattern of speed variation on the rolls so as to reduce the amplitude of the thickness variations.
Claims11
A method of casting metal strip comprising introducing molten metal between a pair of chilled casting rolls forming a nip between them to form a casting pool of molten metal supported on the rolls and confined at the ends of the nip by pool confining end closures, rotating the rolls so as to cast a solidified strip delivered downwardly from the nip, transporting the strip away from the nip, inspecting the strip as it is transported away from the nip to determine a pattern of thickness variations along the strip due to eccentricities of the casting roll surfaces, and imposing a pattern of speed variation on the rotation of the casting rolls determined by said pattern of thickness variations so as to reduce the amplitude of the thickness variations.
Dependencies are inferred from the claim text.