CORE FORMING INNER SURFACE OF RECEIVING HOLE IN CENTRIFUGAL CASTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To surely prevent the occurrence of such accident that molten metal invades during casting into the inner part of a core having repeatedly usable metal-made dividing structure. SOLUTION: This core is composed of; a flange part 22 fitted to the end part of a receiving hole side of a metallic frame 1; cylindrical separation core parts 28 which is arranged on the same axis toward the deep side of the receiving hole in the metallic frame 1 from the flange part 22 and separated into a plurality of portions along the peripheral direction, and in which the normal shape can be formed by expanding the size with centrifugal force at the casting time and the size of the normal shape can be reduced when the centrifugal force disappears; a cylindrical body 41 arranged in the inner part of the separated core part 28; and a flange-like body 48 which is fitted to the outer periphery of the cylindrical body 41 and can close the opening hole at the deep end side of the receiving hole of the separated core part 28 on the outer side in the diameter direction from this cylindrical body 41. COPYRIGHT: (C)2006,JPO&NCIPI