Method and apparatus for producing thin magnesium based alloy plate

Abstract

A magnesium metal thin plate manufacturing method includes at least a casting process of supplying a molten metal obtained by melting a magnesium metal to a molten metal bath, drawing out the molten metal, supplying the molten metal into the gap between a pair of casting rolls composed of at least a pair of casting upper roll and casting lower roll, applying pressure to the molten metal, and casting a plate solidified at a predetermined temperature and having a predetermined thickness, and a rolling process of rolling the cast plate by means of at least a pair of rolling rolls by applying pressure thereto to manufacture a magnesium metal thin plate. With the above arrangement, there can be provided a magnesium metal thin plate manufacturing method and manufacturing apparatus that can effectively manufacture a magnesium metal thin plate by plastic working without requiring a heat energy generation step again in rolling.

1 . A magnesium metal thin plate manufacturing apparatus comprising at least:
 a casting roll section for casting a magnesium molten metal to a plate member solidified at a predetermined temperature by supplying the magnesium molten metal between at least a pair of first rolls and applying pressure thereto within a temperature range from a temperature at which the ratio of a solid phase occupying the magnesium metal is 10 wt % or less to a temperature 40° C. higher than the melting temperature of the magnesium metal; and   a rolling roll section for rolling the cast plate member by applying pressure thereto by means of at least a pair of second rolls to manufacture a magnesium metal thin plate having a predetermined thickness.   
   
   
       2 . The magnesium metal thin plate manufacturing apparatus according to  claim 1 , wherein the casting roll section comprises at least:
 a casting lower roll disposed in the vicinity of the roll section for causing the magnesium molten metal stored in a molten metal bath, in which the molten metal is stored, to adhere around the roll surface thereof and drawing out the molten metal to the outside of the molten metal bath by the rotational force thereof;   a casting upper roll for molding or molding and solidifying the magnesium metal drawn out from the molten metal bath by means of the casting lower roll by pressing the surface of the magnesium metal downward; and   rotational drive units for rotating the casting lower roll and the casting upper roll, respectively, wherein   the temperatures of the roll surfaces of the casting lower roll and the casting upper roll can be adjusted,   an angle between an imaginary line connecting the rotational shaft of the casting lower roll and the rotational shaft of the casting upper roll and a vertical line is adjustable, and wherein   the gap between the casting lower roll and the casting upper roll is adjustable.