The invention relates to an automatic sealing device for cartons. The automatic sealing device for the cartons comprises a
machine frame, a worktable, a conveying mechanism, a centering
carton closingmechanism and a sealing mechanism, wherein the conveying mechanism, the centering
carton closing mechanism and the sealing mechanism are arranged on the
machine frame, and the worktable is arranged on one side of the
machine frame. The automatic sealing device for the cartons is reasonable in design. By arranging the two-layer conveying mechanism, the space of a conveying belt is reasonably used,control is convenient, and the production cost is saved. The cartons are accurately pushed into the center through the centering
carton closing mechanism , and the subsequent step of
adhesive tape pasting is guaranteed. A moment sensor is used for detecting the realizing position in real time, so that the accuracy of centering and positioning of the cartons is further improved. The work of automatic sealing is realized through the sealing mechanism, the floating end of
adhesive tape is fixed to an electrified plate through an
electrostatic adsorption principle, two times of overturning by 90degrees are realized through a rotary motor, and then the work of
adhesive tape pasting of three faces of the cartons is realized. The adhesive tape on the cartons is pressed through a pressing mechanism, and the reliability of bonding between the adhesive tape and the cartons is further guaranteed.