Preparation device and method for semi-solid forming aluminum matrix composite piston

The invention relates to the technical field of aluminum-based composite material preparation, in particular to a preparation device and method for a semi-solid formed aluminum-based composite material piston, which comprises a stirring rod, a stirring head is arranged at the bottom of the stirring rod, a dispersion outer sleeve is sleeved outside the stirring rod, and a cavity is arranged between the inner peripheral wall of the dispersion outer sleeve and the outer peripheral wall of the stirring rod; an air inlet communicated with the cavity is formed in the upper end of the dispersion jacket, and a through hole is formed in the lower end of the dispersion jacket; the dispersion outer sleeve is arranged outside the stirring mechanism, a force field generated by rotation is transmitted to the mixed melt through the through holes to disperse the mixed melt, reinforced particles are distributed more uniformly in a matrix, meanwhile, after entering the dispersion outer sleeve from the through holes, the melt i