Automatic discharging device of carton printing machine

The utility model relates to the technical field of carton printing machine equipment, in particular to an automatic discharging device of a carton printing machine. Comprising a feeding assembly, an overturning assembly, a feeding assembly, a conveying assembly and a discharging assembly, the feeding assembly comprises a feeding frame, the top of the feeding frame is connected with a first drying box, the end, away from the conveying frame, of an adjusting block is connected with a guide plate, and a positioning plate is slidably arranged on the inner side of a supporting side plate. The carton drying device has the advantages that when a turned carton falls onto the feeding belt, the feeding belt passes through the lower portion of the second drying box in the process of conveying the carton, and in the process, hot air generated by an air heater in the second drying box is conveyed to the top of the carton through an air supply pipe; therefore, the printing part of the carton can be dried through hot air,