| 摘要 |
PURPOSE:To enable a turbine passage to be precisely formed in a given size, by a method wherein a sheet molding with which to form a turbine passage is disposed on the inner wall surface of a turbine casing, and an inner sheet molding with which to form an auxiliary turbine passage is situated in the sheet molding. CONSTITUTION:A turbine casing 2 being a turbine body is formed by castings, and a sheet molding formed with a stainless steel casted in the inner wall surface of the turbine casing simultaneously during casting is positioned. In this case, an inner sheet molding with which to form an auxiliary turbine passage 11 is situated in the sheet molded product forming a turbine passage and placed on the inner wall surface of the turbine casing 2. The sheet molding is formed with sheets 5 and 6, and the inner sheet molding is formed with an auxiliary turbine passage 11, where sheets 16 and 17 are situated in a spread state, and a rib part 7 formed by securing together the sheets 16 and 17 in a state to make contact with each other. The rib part 7 is secured to the turbine casing 2 together with the sheet molding.
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