| 摘要 |
PURPOSE:To cast a good-quality hollow aluminum material by force cooling only the cylindrical casting mold and cooling the outside peripheral face of a drawn-out ingot at the time of supplying molten aluminum between the horizontally disposed cylindrical mold and core and casting the hollow material. CONSTITUTION:The molten aluminum 1 supplied into a tundish 2 is supplied between the cylindrical casting mold 5 and the core 6 through a hole 4 of a header plate 3 disposed in front of the tundish. Cooling water 7 is kept run in the mold 5 and is supplied from discharge holes 8 toward the ingot drawn from the mold 5. The molten metal 1 filling the spacing between the mold 5 and the core 6 is, therefore, cooled by the mold 5 to form a solidified shell on the outside peripheral side. The solidified shell increases its thickness as the molten metal progresses to the outlet side. The molten metal is directly cooled by the cooling water when said metal is emitted from the mold 5 so that the solidification progresses further to the inside. The good hollow aluminum material 9 is castable if the length of the core 6 is set at about >=1.2 times the length of the mold 5 and the taper angle alpha thereof at about >=3 deg.. |
