| 摘要 |
PURPOSE:To change quickly the width of a casting mold without generating breakout and surface roughening in a continuous casting slab in the stage of changing the width of the continuous casting slab during continuous casting operation using an assembled type mold for continuous casting by moving the short side plates of the mold by a specific method. CONSTITUTION:The width of a continuous casting slab is changed by moving short side plates during the continuous casting operation wherein a mold for continuous casting consisting of respective two sheets of copper plates for long and short sides is used. The expansion in the width of the continuous casting slag is accomplished by tilting each short side plate 1 like a dotted line 2 and returning the same to the original inclination again like the line 2 after moving said plate in parallel. The reduction in the width of the continuous casting slab is accomplished by tilting each plate 1 like the dotted line 2 in such a way that the upper part thereof approaches to each other then returning the same to the original inclination after moving the same in parallel. The speed Vm' in changing the inclination of the plate 1 in this case is controlled like the equation ( I ) with respect to a parallel moving speed Vm, whereby each short side plate is moved at a relatively high speed Vm of 30-200mm./min and the width of the mold is changed without the generation of breakout, etc. |
