MANUFACTURING METHOD OF ROLLING ROLL MADE BY CENTRIFUGAL CASTING AND CENTRIFUGAL CASTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a rolling roll made by centrifugal casting and a centrifugal casting device which can pour molten metal uniformly in the roll axis direction, reduce ununiformity of an external structure in the roll axial direction due to the pouring of molten metal and can obtain homogeneous casting structure.SOLUTION: In a manufacturing method of a rolling roll made by centrifugal casting of which an outer layer is formed by a centrifugal casting method, a funnel for pouring molten metal composed of a molten metal receiving part which receives an outer layer molten metal of the rolling roll, a molten metal basin part connected to a lateral surface lower part of the molten metal receiving part and a molten metal pouring trough part connected to an end part of the molten metal basin part is used, the molten metal pouring trough part is constituted by arranging a plurality of molten metal pouring troughs having lengths different from one another in the longitudinal direction side by side substantially in the horizontal direction and, on a connection part between the molten metal basin part and the molten-metal pouring trough part, a plurality of bottom surfaces of molten-metal pouring trough parts have heights substantially equal to one another, are located on positions higher than the lowest part on the molten metal basin part inner surface, the molten metal pouring trough parts face the interior of a casting mold for centrifugal casting and an outer layer molten metal is cast to a position different in the longitudinal direction in the casting mold for centrifugal casting.