Put the dry polyethylene particles into the lower hopper of the automatic laminating machine, and enter the screw from the hopper by the weight of the particles. When the pellets contact the threaded beveled edge, the rotating beveled edge will be perpendicular to the plastic. The thrust force pushes the plastic particles forward. During the process, the friction between the plastic and the screw, the plastic and the barrel, and the collision and friction between the particles, and the external heating of the barrel gradually melt. The molten plastic is filtered by the machine head to remove impurities from the die orifice of the die, cooled by the air ring, blown, passed through the herringbone plate, traction roller, and coiled to roll the waste film into a tube.