| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability to high temperature gas and facilitate manufacturing. SOLUTION: A gas leading device 12 is provided with an internal pipe part 17 for composing an intake passage 14, an external pipe part 18 disposed separately from the internal pipe part 17 at a clearance 19, a leading inlet 21 disposed on the external pipe part 18 for leading gas to the clearance 19, and a plurality of leading holes 23a, 23b formed on a prescribed position of the internal pipe part 17 for leading gas led into the clearance 19 to the intake passage 14. The gas leading device 12 is integratedly formed by die-cast. An upper mold 31 for clamping and opening includes a bulk head 31b for forming the clearance 19. A lower mold 32 corresponding to the upper mold 31 includes projection parts 32b, 32c corresponding to the leading holes 23a, 23b. In a clamping process, the bulk head 31b and the projection parts 32b, 32c are brought into contact with each other for forming each leading hole, and they are separated from each other in an opening process.
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