| 摘要 |
PROBLEM TO BE SOLVED: To maintain airtight property in each hollow chamber cheaply by molding using a temporary mold with a partition set therein in advance. SOLUTION: A partition 1a is set in a wax model 1 of a hollow stator blade for a steam turbine with hollow portions 1b, 1c in each chamber. First, a metal die is made for producing the stator blade. Using a metal core or water-soluble core, the partition 1a is set with this core into the metal die to form the hollow portions 1b, 1c. Then wax or the like is injected to produce the wax model 1, and a precision mold for molding is produced by applying fire-resistant ceramics thereto. Furthermore, the wax model 1 is melted or combusted to form a mold having a shape of the product with the hollow portions. Lastly, the hollow stator blade for a steam turbine is completed by pouring molten metal into the mold. With this configuration, airtight performance in each hollow chamber separated by the partition 1a can be maintained.
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