Six forms of corrugated roll wear

First, the height of the molars is grounded: because the "pressure roller" of the "upper corrugated roller" applies pressure to the lower corrugating roller (the general line pressure is 5~10 kg/cm), and the pressure acts on the dome of the UV-shaped corrugation for a long time. The corrugated base paper continuously rubs against the dome during the corrugating molding process, so that the dome of the corrugated tooth is quickly worn. If the height of the caries is lower than the lower limit of the standard height due to wear, the rolled corrugation does not meet the standard.

Second, the flat head: due to the three-roller extrusion under pressure, especially the "pressure roller" squeezes the "lower corrugated roller", causing the dome to change from a pointed top to a flat top, resulting in an increase in the amount of glue applied, "gelatinization" time Lengthening, can only reduce the speed of the car to ensure full "gelatinization."

Third, one side down: "Upper corrugated roller" is driven by the "lower corrugated roller", so the circumferential force of the molar always acts in one direction, the wear of the molar is faster than the unstressed side, so that The teeth are deformed by one side of the wear, and the corrugated shape of the corrugated cardboard is also inverted, affecting the strength and appearance.

4. Grinding pit: Corrugated paper has relative sliding between the paper and the caries during the forming process of the corrugating roller. Since the corrugated paper always contains certain sand grains or other hard impurities, the sliding makes the corrugated paper look like the abrasive belt in the circumferential direction. Rubbing the molars, over time, causes the surface of the corrugated roller to produce point-like abrasion, commonly known as grinding. The roughness of the molar surface is severe. The lower the quality of corrugated paper, the greater the chance of crating.

5. Medium and high wear: Since the full-width paper is often not used on the production line (that is, the paper width is smaller than the corrugating roller width), the middle section of the corrugating roller wears faster than the two ends, causing so-called medium-high wear, and the corrugating roller with medium and high wear occurs. When the corrugated corrugated corrugated fabric is pressed, the force of the two ends is greater than the intermediate force, which causes the corrugated core paper to rupture at both ends after the corrugated sheet is formed.

6. Tilting or twisting of the caries: If the parallel adjustment of the upper and lower two-roller rollers is improper, the corrugating roller is subjected to a large force at one end, and the long-term operation causes the molars to be inclined or twisted. In addition, the corrugation roll ovality, the garden beating, etc. may be caused to be excessive.

The above six kinds of wear have reached a certain level, and the corrugating roller must be repaired. This repair can only be carried out twice. Because the diameter of the roller is reduced by about one millimeter for the first time, the circumference of the second repair will be reduced by more than 6 mm, so that the pitch of the molars and the wedge angle will change, because the transmission ratio remains unchanged. The "lower corrugating roller" is out of sync with the pressure roller, causing the cardboard to wrinkle. Therefore, the pressure roller should also be repaired while repairing the corrugating roller.