| 摘要 |
PURPOSE:To improve the productivity of direct casting by a single roll and to reduce its cost by specifying a roll width to an extrusion nozzle width of molten metal and casting the molten alloy while displacing a rapidly cooling operating surface of the roll every specified interval. CONSTITUTION:The molten metal is extruded from the nozzle 2 of a vessel of molten metal onto the surface of the single roll 4. The molten metal is rapidly cooled and solidified on the surface of the single roll 4. The width oft he single roll 4 is made at least double the width of the nozzle 2. The rapidly cooling operating surface of the single roll 4 is dislocated by shifting the single roll 4 from zone A to zone B and to zone C. The surface of the roll in the former casting part is ground and castings are repeated. In this way, the productivity of direct casting can be improved and its cost can be reduced. |
