B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/51
B22D 11/12 (2006.01) B22D 11/16 (2006.01) B22D 11/20 (2006.01)
Patent
CA 1233011
ABSTRACT OF THE DISCLOSURE A width changing method in which the width of a slab under casting is changed by a movement of narrow face of a continuous casting mold by the operation of a horizontal driving device and a rotary driving device operable independently of the horizontal driving device. The period of width changing operation is divided into a forward taper changing period in which each narrow face is inclined toward the center of the mold and a rearward taper changing period in which each mold wall is inclined away from the center of the mold. The accelera- tion of the horizontal movement of each narrow face is determined by means of allowable shell deformation resistance as a parameter for each period. Also is determined the angular velocity of the rotary device or the difference in velocity between the upper and lower ends of the narrow face. The width changing operation is conducted while maintaining the acceleration and the angular velocity or the velocity difference at constant levels in respective periods.
490523
Ninomiya Takeyoshi
Ohashi Wataru
Temma Masami
Tsutsumi Kazuhiko
Gowling Lafleur Henderson Llp
Nippon Steel Corporation
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