| 摘要 |
PURPOSE:To prolong service life as cooling roll by shifting two rolls toward their axial direction to uniformize by dispersing a deforming position and its quality on the surface of the roll, at producing thin hoop metal, by which molten metal is cooled rapidly by twin roll method. CONSTITUTION:Two cooling rolls 6, 6 made of Cu alloy, etc., are rotated at high speed and reverse direction for each other rool, and molten metal 2 in a crucible 1 is injected into a gap between the both rolls and cooled super- rapidly by the both rolls, to produce continuously the thin hoop metal 7. In this case, the surface of the cooling rolls 6, 6 are worn by the thin hoop metal 7 and developed to irregular unevenness, and it results in impossibility for producing the thin hoop metal having uniform thickness and sevice life of the cooling roll 6 is shortened. During supplying or at stopping of supplying the molten metal betwee the both cooling rolls 6, 6, both the rolls 6, 6 are shifted in an S direction of a rotary shaft 9 so that the mutual positions are deviated to prevent formation of uneven deformation for the roll surface, and as the deformation of the surface of rolls 6, 6 is little and dispersed uniformly, the service life as the cooling roll is prolonged. |
