For the positive pressure Single facer machine, a vacuum is formed on the scraping roller, the pasting roller, and the corrugating roller, and then air is blown in so that the corrugated paper is firmly pressed on the corrugating roller. In this case, the blowing force acts on the entire corrugating roller, and the suction force to the edge of the groove is much smaller than the traditional negative pressure.

Because the suction of the negative pressure Single facer machine has no way to enter the corrugating roller, it is concentrated at both ends to generate suction, so its force is relatively large. Because of this, the force of the positive pressure copper knife to peel off the cardboard will be relatively small, and the damage to the strength of the corrugated paper is also very small.
Comparison of the advantages and disadvantages of the corrugated cardboard produced by the positive pressure type and the negative pressure type Single facer machine The strength is much smaller than the traditional negative pressure, so the side pressure is relatively higher by about 5%, which is equivalent to the latest internal suction machine.
2) In terms of the difficulty of paper breaking control when the machine is stopped, positive pressure can make the paper continuous. Because the positive pressure type is the force of blowing, even if the paper is continuous, the corrugating roller can still run idly; and if it is sucked on top, the corrugating roller will rotate, and the paper will also rotate, so when the paper breaks and stops, the loss is very different.
Through the above introduction and analysis of the Positive pressure Single facer machine, hope it helps you.