| 摘要 |
<P>PROBLEM TO BE SOLVED: To appropriately adjust the sheet thickness of a strip while evading a quality defect. Ž<P>SOLUTION: In addition to the sheet thickness control of a strip 3 wherein a molten metal reservoir 8 formed between cooling rolls 1 is made deep, and the time for which metal is touched with the outer circumferential faces of the cooling rolls 1 is elongated, so as to cover heat removal insufficiency, and the sheet thickness control of the strip 3 wherein the molten metal reservoir 8 is made shallow, and the time for which metal is touched with the outer circumferential faces of the cooling rolls 1 is reduced, so as to suppress heat removal excess, a control wherein the oscillation of the molten metal reservoir 8 is prevented by displacing the nozzle piece 4 in the up and down directions by an actuator 13 in such a manner that the relative positions of the free liquid face of the molten metal reservoir 8 and a nozzle piece 4 are made fixed is used in combination, so that impurities such as oxides stuck to the nozzle piece 4 are fallen off into the molten metal reservoir 8. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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