Controls warping in the vertical direction:
1. Reduce the drag force of the friction plate at the exit of the flyover;
2. Check the overpass pipe guide plate of the control paper gap;
3. If the overpass piles up, the amount of accumulation on the overpass should be reduced;
4. Reduce the brake friction on the preheater;
5. Correct the preheater and idler to allow it to rotate freely;
6. Use base paper with high tension.
Control vertical warpage:
1.Under the influence of paperboard quality, use the base paper with low tension;
2. Increase the pressure of the cotton web on the cardboard to increase the paperboard's force on the hot plate;
3. Reduce preheater brake drag force;
4. Increase the drag force of single-sided corrugated board on the overpass;
