Two lower boxes and one upper box. The lower core does not affect the molding cycle. The lower box can reach 110 boxes/hour (including the lower core time) per hour at the two stations, and the monthly capacity can reach 1000 tons. Vertical sand shooting and horizontal parting sand add sand from the vertical direction, so it has the best filling performance. In addition, the guide rectifying plate installed at the sand shooting mouth and the combined sand shooting device are used together to completely improve the possible shadow defects.