Patent ID: 9120146
Filing Date: 2015-09-01
Classification: B22D

Abstract:
1. A free casting method for making a casting free of a casting mold, the method including: drawing molten metal up from a surface level of a molten metal in a crucible along a set passage; forming a surface film generated by a surface tension on an outer surface of the molten metal along the set passage; retaining the molten metal drawn up from the surface level of the molten metal in the crucible within the surface film to form an unrestrained root portion of the retained molten metal at an interface between the surface level of the molten metal in the crucible and the retained molten metal in the set passage; and forming a solidified formed body at a solidification interface between the unrestrained root portion of the retained molten metal in the set passage and the formed body by solidifying the retained molten metal in the set passage depending on a desired casting shape of the formed body and moving the unrestrained root portion of the unsolidified retained molten metal with respect to the solidified formed body along the surface level.