| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for precisely producing a high melting point metal hollow drum-shaped casting such as a valve, particularly, to provide a mold for precisely casting a high melting point metal valve for performing fuel feed and control in a large-sized rocket using liquid hydrogen as fuel, and to provide a precise casting method using the mold. SOLUTION: The mold has an opening cavity part 6 for precisely casting a high melting point metal hollow drum-shaped casting. The mold has a structure where, to the upper half of the opening cavity part in the mold, the outer face is covered with a heat insulating material 2, and also, the opening part of the opening cavity part 6 is clogged with the heat insulating material 2. The precision casting method uses the mold. COPYRIGHT: (C)2007,JPO&INPIT
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