FREE CASTING METHOD, FREE CASTING APPARATUS, AND CASTING

摘要

PROBLEM TO BE SOLVED: To provide an epoch-making casting method without requiring a mold.

SOLUTION: A free casting method includes, a lead-out step for leading out retained molten metal (MS) constituted of molten metal temporarily held by surface films (F) generated on an outer surface from a lead-out area (P) provided in a source of supply, and a forming step for obtaining a formed body by solidifying the retained molten metal (MS) led out along a set passage (L1) depending on a desired casting shape, wherein the retained molten metal is solidified after being formed into the desired casting shape by applying an external force thereto at positions between an unrestrained root portion of the retained molten metal in vicinity of the surface level of a supply source of the molten metal and a solidification interface defined as a boundary between the retained molten metal and the formed body in the forming step. With this method, a complicated shape of casting can be effectively obtained while easily eliminating casting defects, etc that have been problems in a conventional casting method.

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