| 摘要 |
PURPOSE:To continue casting without taking an extreme countermeasure for operation and to restore effectively the restrained breakout of a solidified shell when said breakout is detected by assuring the negative strip time to form the required min. thickness of the solidified shell. CONSTITUTION:The min. required thickness of the solidified shell for the level at which restraint is generated is preliminarily set and the correlation between the negative strip time and the solidified shell forming speed is determined. The negative strip time to allow the min. thickness of the solidified shell necessary at the restrain generating level to form is assured by controlling 1 or >=2 among the casting speed, the oscillation frequency, amplitude and oscillation waveform of a casting mold when the restrained breakout 30 of the solidified shell in the casting mold 1 is detected. The casting is continued while the breakout part 30 is restored in the mold 1.
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