The utility model belongs to the technical field of molding machines, and particularly relates to a sand blowing mechanism of a
molding machine, which comprises a base, a first
hydraulic cylinder is fixed at the top of the base, a molding bottom die is fixed at the ejection end of the first
hydraulic cylinder, a support is fixed at the top of the base, and a second
hydraulic cylinder is fixed on the inner wall of the top of the support. According to the sand blowing mechanism of the
molding machine, the base, the molding bottom die, the support, the pressing plate, the air blowing
assembly, the fixing frame, the collecting hopper, the rotating shaft, the
spiral blade and the material blocking
assembly are arranged, in the using process of the sand blowing mechanism of the
molding machine, sand on the surface of the molding bottom die can be automatically blown off through the arranged movable air blowing
assembly, manual operation is not needed, time and labor are saved, and the production efficiency is improved. The sand blowing device is simple in structure and capable of collecting blown-off sand under the cooperation of a collecting hopper, and meanwhile, a rotating
spiral blade is arranged in the collecting hopper, so that it is more convenient for workers to
discharge the sand collected in the collecting hopper in the later period.