The invention relates to the technical field of packaging, in particular to a
cardboard sticking device. The
cardboard sticking device comprises a support frame; a
crankshaft is arranged above the support frame; an
adhesive spray box is vertically arranged between the
crankshaft and the support frame; the
adhesive spray box is tapered, and the big-
diameter end of the
adhesive spray box is arrangedupwards; the bottom of the adhesive spray box is communicated with an adhesive spray
pipe; the adhesive spray box is internally provided with a first
piston in a sliding way, and the length of the first
piston is the same as the
diameter of the small-
diameter end of the adhesive spray box; the first
piston is hinged with a first connecting rod, and the first connecting rod is hinged with a rod journal of the
crankshaft; a conveying channel and a squeezing board are sequentially arranged at one side of the adhesive spray box; a
conveyor belt is arranged at one side of an entrance of the conveying channel; a transmission part is connected between a driving wheel of the
conveyor belt and the crankshaft; the squeezing board props against a
cardboard and is provided with a rectangular groove;an incomplete gear is arranged in the rectangular groove and is connected with the crankshaft; driving teeth meshed with the incomplete gear are respectively arranged on a pair of side walls of the rectangular groove. The cardboard sticking device can realize automatic sticking of the cardboard and reduce the work load of workers.