| 摘要 |
PROBLEM TO BE SOLVED: To provide a precision casting method, its casting and a rotary machine with which even in the case of being a cast product having a narrow gap in this inner part, this can easily be cast without using a metallic mold for manufacturing a core. SOLUTION: This precision casting method is provided with a process, in which a ceramic powder-made core 10 is directly molded from mixed powder of the ceramic powder and organic binder (phenol, silicone resin, etc.), with a powder sintering type three-dimensional quick molding device, a process, in which an inorganization and a hardening treatment is performed by impregnating ethyl silicate and alkoxide into the ceramic powder-made core 10 and burning to obtain the ceramic core 15, a process, in which the ceramic core 15 is combined into a lost pattern (wax-made or lost form resin-made of foaming polystyrene or foaming polyurethane, etc.), 20 and a stuccoing is performed to the surrounding of the lost pattern 20 to form a mold 25, a process, in which the lost pattern 20 is lost, and a process, in which molten metal is poured into the mold 25 to obtain the cast product 100. COPYRIGHT: (C)2004,JPO
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