| 摘要 |
PURPOSE:To restrain the development of overflow, breakout, etc., by reducing opening of a flow rate adjusting means by equal opening degree with the increasing opening quantity of the fixed opening at the step reaching to the finishing aimed level and after that, executing the level control maintaining the finishing aimed level. CONSTITUTION:When the actual measured level locates at less than the control starting level, the control fixing the opening of a sliding nozzle 8 or the feed- forward control is executed. Next, when the actual measured level exceeds the control starting level, the control balancing the pouring quantity at the first half stage with the casting quantity is executed. Further, at the time of passing for the fixed time by timer-count-up or when the variation of the actual measured level added to the above fixed time is shortened from the some value, the control, which the actual measured level at the second half stage is converged to the aimed level, is started. By this method, the control at the second half stage is completed, to shift to the control of stationary state. |
