Original position 180-degree turnover mechanism for multi-layer stacked sizing materials

The utility model discloses an original position 180-degree turnover mechanism for multi-layer stacked sizing materials, which relates to the technical field of sizing material packaging and comprises a U-shaped support, a turnover unit and a lifting unit. Lifting units are installed on the front side and the rear side of the U-shaped support. The overturning unit comprises connecting blocks, hydraulic cylinders, a rotating air cylinder, a U-shaped fixing base, an overturning plate, an arc-shaped groove, a bearing plate and a positioning assembly, the lower ends of the left side and the right side of a U-shaped support are each provided with one connecting block, and the outer ends of the connecting blocks are each provided with a pair of hydraulic cylinders; a telescopic rod of each pair of hydraulic cylinders penetrates through a round hole of a connecting block to be fixedly connected with the two sides of the outer end of the base, a rotating air cylinder is arranged at the inner end of the base, and acco