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In order to control the amount of glue, the glue device should first be accurately measured and adjusted. If the gap is too small, the two rollers will rub and damage the glued anilox roller, resulting in irreparable consequences and normal production. Therefore, care must be taken during the adjustment, and the expansion and deformation of the corrugated roller after heating must be considered, so the adjustment must not be rushed.
The gap between the anilox roller and the squeegee roller of the glue application part of the single-sided machine must be consistent, and there must be no slight error, otherwise the amount of glue will cause the uneven moisture content of the cardboard and make the cardboard The deformation on the two sides is inconsistent, and the cardboard will bend on one side, causing trouble for the next process. In addition to the gap between the anilox roller and the corrugated roller, the proper gap between the two rollers should be controlled. If the gap is too large, the glue will be poor and cause local blistering and poor adhesion: due to the corrugated roller Inconsistent with the linear speed of the gummed anilox roller during operation.
The entire production process of corrugated paperboard is inseparable from the pressure, pressing corrugated corrugated requires pressure, and the bonding between paper and paper also requires the cooperation of pressure to complete. Therefore, the right pressure is an important guarantee for the manufacture of high-quality corrugated cardboard. Under normal circumstances, the pressure between the corrugated roller and the pressure roller should be controlled at about 0.4Mpa, but it should be flexibly controlled according to the quality of the paper. The paper material of the good grade paper is pure wood pulp or a high proportion of wood pulp The raw material, so the tightness is relatively tight, and the adhesive is difficult to penetrate into the fiber of the paper after coating. Therefore, the pressure should be greater: the raw materials of low-grade paper are basically waste paper and recycled paper, and the physical indicators are poor. If the pressure is too large, the fiber of the paper will be damaged or the paper will be crushed. The actual production should ensure the bonding strength. Under the premise of adjusting the pressure of the pressure roller according to the quality of the paper.
The gap between the glue anilox roller and the glue roller of the double-layer glue machine should also ensure that the two ends are consistent, and there should be no slight error. However, under normal circumstances, the gap between the anilox roller and the paper pressure roller should be reduced by about 0.30 mm according to the thickness of the two layers of cardboard. Therefore, we must be careful and precise when adjusting the gap between the rollers of the glue application device. At the same time, we should strictly control the amount of glue application, and the glue application area must be controlled within the width of the corrugated peak 1mm ~ 1.5mm, otherwise it will not only increase production Cost, and the quality of the product is not satisfactory. If the gap is too large, the glue will be bad and cause waste products: if the gap is too small, the corrugated paper will contact the glued anilox roller too much, and the corrugated paper will exceed the actual amount of glue when it is glued. When the cardboard enters the drying tunnel, it will flatten and collapse the corrugations under the action of gravity rollers, making the cardboard thinner and softer.
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