| 摘要 |
PURPOSE:To obtain a good cast ingot of uniform quality by controlling the velocity of the molten metal to be supplied to a cooled mold, and acting electromagnetic repulsive force upon the molten metal thereby forming a well part of a stable shape on the cooled mold. CONSTITUTION:Molten metal 10 is supplied from a furnace 1 via a trough 6 into a well part 14 from a nozzle 8 while the rate of supply is being controlled by a stopper 7. This nozzle 8 is properly immersed in the part 14, so as to flow the molten metal at the rate as gently as possible into the part 14. In the part 14, the shape is maintained simply by the pinching force generated by an electromagnetic coil 13, and said shape is controlled by controlling induction force distributions by the shapes of the coil or suitably selected shielding materials. On the other hand, the molten metal supplied into a cooled mold 9 forms a thin solidification shell by the heat deprived of from the mold walls. Next, a cast ingot 17 is drawn from the bottom part of the mold 9 by a cylinder 20, and cooling water 18 is sprayed to the ingot 17 to apply quick cooling effect down to its inside, whereby the ingot of superior internal quality is obtained. |
