The utility model relates to the technical field of flattening die-
cutting machines, and discloses a packaging
paperboard automatic flattening die-
cutting mechanism which comprises a conveying rack, a flattening
machine and a mounting frame are arranged at the top of the conveying rack, a hydraulic
machine is mounted at the top of the mounting frame, the output end of the hydraulic
machine is fixedly connected with a connecting plate, and the output end of the connecting plate is fixedly connected with the conveying rack. A buffer
assembly is mounted at the bottom of the connecting plate, a
butt joint plate is arranged at the bottom of the buffer
assembly, a fixing
assembly is mounted at the bottom of the
butt joint plate, a mold is slidably connected to the bottom of the
butt joint plate, and a sensor is mounted on the inner side of the mounting frame. The buffering assembly comprises a connecting frame, and the outer side of the connecting frame is slidably connected with a sliding block. The die contacts with the
carton, the butt joint plate pushes the sliding block to extrude the buffer spring through the connecting rod, the spring deforms to absorb overload pressure of a hydraulic machine, damage of rigid
impact to a
cutting edge of the die is reduced,
pressure transmission is smoother through the
buffer design, and the service life of the die is prolonged.