Precoated sand mixer

The utility model discloses a precoated sand mixer, which belongs to the technical field of sand mixers and comprises a supporting seat, the top of the supporting seat is fixedly connected with a supporting frame, the top of the supporting frame is fixedly connected with a fixing sleeve, and the bottom of the fixing sleeve is fixedly connected with a spring. The mixing box can be supported and buffered, the stability of the mixing box during working is guaranteed, the mixing box can be driven to shake through working of a vibrator, the mixing box during shaking can assist discharging work and guarantee the discharging efficiency, a driven gear and a stirring shaft can be driven to rotate through working of a driving assembly, and the stirring effect is improved. And meanwhile, scattering blades, a sleeve, a connecting rod, a cleaning plate and stirring blades are driven to rotate, sand can be sequentially subjected to scattering, auxiliary stirring and mixing and stirring and mixing treatment by means of the