Four-corner bonding device for paper-plastic composite bag

The utility model provides a four-corner bonding device for a paper-plastic composite bag. The four-corner bonding device for the paper-plastic composite bag comprises a glue box; the frame is fixedly mounted at the top of the glue box; a plurality of bidirectional screw rods, wherein the plurality of bidirectional screw rods are rotatably mounted on the frame; the two sliding plates are arranged on the plurality of two-way screw rods in a threaded and sleeving manner; the plurality of rotating shafts are rotationally mounted on the two sliding plates respectively; the plurality of rollers are fixedly mounted at the top ends of the plurality of rotating shafts respectively; and the driving mechanism is arranged on the frame, and the driving mechanism is used for driving the plurality of bidirectional screw rods to rotate. The four-corner bonding device for the paper-plastic composite bag has the advantages of being high in processing efficiency, good in bonding effect and convenient to operate. 本实用新型提供一种纸塑复合袋