| 摘要 |
PURPOSE:To manufacture a thin metallic strip having a required width and thickness and good quality maintaining the surface temp. of a cooling base plate under movement at an adequate temp. by low-pressure ejection and preliminary casting then executing normal casting and using the aperture slits of plural nozzles for normal casting. CONSTITUTION:The melt 2 of the same kind or different kind is ejected under the pressure 5 lower than a normal casting pressure into the cooling base plate 6 under movement (cooling roll) and is quickly cooled, by which the surface temp. of the base plate 6 is maintained at the adequate temp. The preliminary casting is stopped and the normal casting 1 is executed under the adequate pressure 5 when the adequate temp. is detected by a contact thermometer 3. A thin metallic strip 7 has a satisfactory surface condition without brittleness. The casting of the thin metallic strip having about >=20mm. width and about >=50mum thickness is made possible by using the normal casting nozzle having the plural apertures. The production of an extra fine wire is possible if the preliminary and normal casting nozzles having plural round holes are used. |
