| 摘要 |
PURPOSE:To uniformize a casting, to prevent development of porosity and to improve yield of a product by arranging movable magnetic field generating means in at least one side of upper face and/or lower face of metallic flash surrounding a mold. CONSTITUTION:The mold 11 composing of a cope and a drag formed by strengthening casting sands, is held as surrounding with the metallic flask 7, and casting part 2 to be finally cast as the product, sprue 3 at upper part and runner 14 having simple shape, only are arranged in the mold 11. The movable magnetic field generating means 17 of liner motor, etc., is arranged on the lower face or the upper face of the metallic flask 7 and at the time of casting molten metal into the mold 11 in the moving magnetic field by this means 17, the molten metal is stirred as circulating by action of the electromagnetic force caused by generating eddy current. As temp. distribution is uniformized by stirring under such a way, the development of the porosity can be prevented and the yield of the product can be improved.
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