| 摘要 |
PURPOSE:To facilitate the fabrication of a core required for the blade precision casting by respective paralleling of each center line in a thickness direction of a section in the specific direction, in plural partition walls forming the cooling fluid flow channel provided inside of a blade main body. CONSTITUTION:Partition walls 13a, 16a, 17a extending in the height direction of a blade main body 2 are arranged in plural number in the cord direction of the blade main body 2 inside of the blade main body 2, and thereby, cooling fluid flow channels 11, 12 are formed by said partition walls. In this case, each partition wall 13a, 16a, 17a is respectively arranged as paralleling center lines P'1-P'3 in the thickness direction of a section intersecting at right angle with the height direction of the blade main body 2. Each partition wall 13a, 16a, 17a is formed in such a shape as increasing the thickness in tapered manner, with a camber line C as a center, as closing toward the back and ventral side of the blade main body 2. By such structure, at the fabrication of a core required for the blade precision casting, the core can be manufactured by only two metal molds 31a, 31b, further, the drawing out of each metal mold 31a, 31b can be easily performed. |
