| 摘要 |
PURPOSE:To produce spiral iron cores of sheets of a high Si-Fe alloy with reduced stages and economized energy by charging molten metal into a rotary mold, and depositing and solidifying the molten metal in the central direction of revolutions in a laminar state along the wall surfaces of the mold. CONSTITUTION:The molten metal 7 of a high Si-Fe alloy in a crucible 6 is flowed through an electromagnetic flowrate valve 8 at the regulated flow rate into a mold 2. The mold 2 is formed of a metallic circumferential wall 10 of high heat conductivity and mold side plates 11 made of ceramics of low heat conductivity, and is rotated in one body with a revolving shaft 12. During this time, the momentary flow rate of the molten metal 7 passing through the valve 8 and the momentary rotating speed of the rotary cooled mold 2 are controlled in accordance with the combinations of the temps. in the respective parts detected with thermocouples 13 provided in a number of placed. Thus the fresh solidified layers are formed successively on the surface of the metallic sheet layer which has solidified first whereby the iron core material having small watt loss of the spirally laminated body is obtained. |
