Screening device for raw materials for injection molding

The screening device comprises a base, a shifting block, a screening bin and a movable drawer, the screening bin is arranged on one side of the top end of the base, a spiral groove is formed in one side of the screening bin, second sliding rods are evenly arranged on the two sides of the interior of the screening bin at equal intervals, and the shifting block is arranged in the spiral groove. The screening bin is fixedly connected with the second sliding rod. The filter plate is arranged at the bottom end of the interior of the movable drawer, raw materials of different sizes and specifications can be screened, meanwhile, the bolts on the connecting plate on one side of the movable drawer are rotated into the screw grooves in the screening bin, the positions of the movable drawer and the connecting plate on the screening bin can be fixed, and when the interior of the movable drawer needs to be cleaned, the movable drawer can be cleaned conveniently. And by rotating a rotating rod on a connecting plate, the ro