Molten aluminum sampling and casting die

The utility model belongs to the field of aluminum smelting detection equipment, and relates to a steel molten aluminum sampling and casting die. The outer shape of the molten aluminum sampling and casting die is a cylindrical body, the cylindrical body is internally provided with an inverted circular-truncated-cone hollow cavity, the side surface of an inner cavity of the die is scaled with scale marks, a taper angle alpha of the side wall of the hollow cavity is 1-5 degrees, a spherical bulge is arranged at the center of the bottom part of the hollow cavity of the die, and the height of the bulge is 1-4 mm. The molten aluminum sampling and casting die disclosed by the utility model has the beneficial effects that a sample which is cast by using the die with scale marks also has corresponding scale marks, the sample at the bottom part which is in component deviation caused by segregation can be conveniently removed by an operator according to technical requirements, and thus the analysis accuracy of the sample is increased; the spherical bulge is arranged at the center of the bottom part of the hollow cavity of the die, the radiating efficiency of the die is increased due to the design structure, the segregation degree is reduced, and thus the analysis accuracy degree of the sample is increased; and a steel die is adopted, the uniform and quick solidification of molten aluminum is ensured, the component segregation degree is reduced, the uniformity and the consistency of an internal crystal structure is ensured, and thus the analysis accuracy degree of the sample is increased.