Abstract: A method cold folds a hollow tube of magnesium material. The method includes providing an inner rib at opposite sides of a hollow square tube made of magnesium material, accommodating the square tube by having opposed ends of the square tube received in an upper portion guide member of a female mold, in an inner portion of the square tube received in a lower portion protection member of a male mold, and lowering the male mold to fold the square tube by the combination of a curved surface portion of the male mold and a curved surface of the female mold.

Abstract: There is provided a cold folding method for a hollow tube of magnesium material. The method has the steps of: providing an inner rib at opposite sides of a hollow square tube made of magnesium material, accommodating the square tube, having opposed ends received in the upper portion guide member of the female mold, in an inner portion of the lower portion protection member of the male mold, and lowering the male mold to fold the square tube by the combination of the curved surface portion of the male mold and the curved surface of the female mold.

Abstract: There is provided a method of deep drawing magnesium material, which material is superior in environmental compatibility and energy saving properties. The deep drawing method of the invention uses a die having a male mold 1 with a convex portion, and a female mold having a concave surface. In the method of the invention, a mounting table is placed between the male mold and the female mold for supporting a magnesium plate, and a layer of a plurality of thin resin films is placed on the magnesium plate. Further, a central portion of the magnesium plate is kept in contact with the convex portion 12 of the male mold, and the concave surface of the female mold is moved to cooperate with the convex portion of the male mold so that deep draw forming of the magnesium plate is achieved.