CONTINUOUS CASTING MACHINE FOR THIN WALLED BILLET

摘要

PURPOSE:To prevent thoroughly the formation of a solidified shell on both short sides of a funnel-shaped sprue by providing recesses enclosed with refractories having a low heat conductivity on both short side surface sides in the sprue, disposing charging nozzles in the respective recesses and charging a molten metal through the nozzles. CONSTITUTION:Recesses 8 enclosed with refractories 7 having a low heat conductivity are formed on both short side surface sides in a funnel-shaped charging port 4 formed at the top end of a casting space 3 by converging and inclining downward opposed metallic belts 1 which are cyclically moved in a direction B by driving rollers 6. A molten metal is cast through the charging nozzles 10 disposed in the recesses 8 to both short sides of the sprue 4 as shown by C, to prevent the formation of a solidified shell on both short side surface sides of the sprue 4 and to throttle the molten metal to the thickness of a thin walled billet. The amt. of the molten metal to be charged is adjusted between said nozzles and a charging nozzle 5. The formation of the solidified shell along the short side surfaces of the funnel-shaped sprue is thus thoroughly prevented and the drawing of the billet by the metallic belts is made easy.