| 摘要 |
PROBLEM TO BE SOLVED: To provide a socket inner surface molded core for a centrifugal molding method, a molded core that makes a metallic core usable in place of a sand core, that enhances molding accuracy even with a metallic core, and that enables an inversely tapered part to be released from the mold. SOLUTION: The socket inner surface molded core is characterized in that it has a flange section 11 in contact with the socket 4 side end of a metallic frame 1 and a core section 12 coaxially extending backward from the flange section 11 into the socket on the inner surface of the tube socket 4; that a reaming section 13 reaming to extend backward into the tube socket of the core section 12 is circumferentially divided into plural ones, with one end 19 of each divided part held freely rotatably around the shaft arrayed along the circumferential direction, and with the other end of the divided part 13 rotatably moved outward radially around the axis 21 by a centrifugal force at the time of rotation of the metallic frame 1 to form the inner mold; and that the rotary shaft 21 of the divided part 13 is constantly elastically pressed so as to be moved along the tube axis toward the outside of the socket 4. COPYRIGHT: (C)2004,JPO
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