Al-Mg alloy preparation device capable of rapidly forming equiaxed grains

The Al-Mg alloy preparation device comprises a pouring gate mold, a male mold, a female mold and a base, four through round hole pouring gates are evenly formed in the bottom of the pouring gate mold in a central symmetry mode, and an arc chamfer is formed in an upper opening of each round hole pouring gate; a first blind hole with a downward opening is formed in the center of the bottom of the sprue mold, the female mold is installed on the base, a second blind hole with an upward opening is formed in the center of the bottom of the base, the male mold is installed in the female mold and located between the sprue mold and the base, and the upper end of the male mold protrudes out of the female mold and is assembled in the first blind hole. The lower end of the male die is assembled in the second blind hole. According to the method, the number of sprues is increased, the contact area of the melt and the mold cavity wall is increased, the surface roughness of the mold cavity wall is increased, the number of gr