Patent ID: 6443221
Filing Date: 2002-09-03
Classification: B22D

Abstract:
A continuous casting apparatus for molten metal wherein electromagnetic force is applied in a direction vertical to the inner wall of a continuous casting mold (2) near or initially solidified portion (21) of a meniscus of molten metal (12) within the mold,the continuous casting apparatus (1) comprising, around the periphery of the mold, an electromagnetic coil (10) to which low-frequency alternating current at a frequency of several tens to several hundreds of Hertz is continuously or intermittently applied, the mold comprising first cooling copper plates (4) and second cooling copper plates (5) forming inner portions of the mold, and first nonmagnetic stainless steel back plates (6) and second nonmagnetic stainless steel back plates (7) forming outer portions of the mold, the mold comprising a pair of the first cooling copper plates (4) and the first nonmagnetic stainless steel back plates (6) used in combination with the first cooling copper plates, a pair of the second cooling copper plates (5) and the second nonmagnetic stainless steel back plates (7) used in combination with the second cooling copper plates, and a plurality of divided cooling portions (3) containing insulating material (18), the first cooling copper plates and the second cooling copper plates each having at least one groove (8) on the side opposite to a casting face (23), each of the first and second back plates closing and fixing a face side having the at least one groove of the corresponding first or second cooling copper plate, whereby the grooves form cooling paths (8), the first cooling copper plates and the second cooling copper plates being electrically insulated from each other through insulating material (18), and the first back plates and the second back plates being insulated from each other and fastened together while they are mutually in an electrically insulated state.