| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a complicated-shape structure which can reduce such a defect-occurring risk that a shrinkage cavity defect is generated in a cast product.SOLUTION: A method for manufacturing a complicated-shape structure including a rotationally-symmetrical shape part in which a space in which a rotation body rotates is formed inside a casing, and a rotationally-asymmetrical shape part continuously provided vertically below the rotationally-symmetrical shape part, includes: a first step of casting by pouring a predetermined amount of a molten metal from a downward in-gate 11 to a region located on a side lower than a boundary position in a height direction where a cavity C is partitioned into the rotationally-asymmetrical shape and the rotationally-symmetrical shape part; and a second step of casting by pouring a molten metal from an upward in-gate 21 to a region located on a side upper than the boundary position by interposing a predetermined time interval after completion of the first step. |
