METHOD AND APPARATUS FOR PRODUCING HOLLOW METAL INGOTS

摘要

Hollow metal ingots are produced by a hollow metal manufacturing apparatus comprising a mold placed on a stool, and a cylindrical metallic cooling core placed in the mold to form an annular casting space therebetween. During the casting, a cooling fluid is directly blown upon the inner surface of the core while the cylindrical metallic core is allowed to be buckled. The cooling core is constituted by an outermost metallic cylinder to be brought into contact with a molten metal, a cylindrical lattice-fashioned buckling-adjusting frame positioned in the metallic cylinder and provides passages through which the cooling fluid is passed, and a cooling fluid vessel which is positioned inside the buckling-adjusting frame and is provided with a number of cooling fluid blowing nozzles.