Sand core dip-coating device

The utility model belongs to the technical field of sand core dip-coating, and discloses a sand core dip-coating device which comprises a coating pool, a first supporting assembly, a second supporting assembly and a plugging head. The coating pool is used for containing coating. The first supporting assembly comprises two supports, each support comprises a fixing part, a guide rod and an elastic part, the fixing parts are fixedly arranged above the coating pool, the top ends of the guide rods are fixedly arranged on the fixing parts, the bottom ends of the guide rods extend into the coating pool, limiting parts are arranged at the bottom ends of the guide rods, and the elastic parts are arranged on the guide rods in a sleeving mode and located between the fixing parts and the limiting parts. The two ends of the second supporting assembly are arranged on the two guide rods in a sleeving mode correspondingly, and the second supporting assembly is arranged between the elastic piece and the fixing piece. The plug