Analysis of Common Problems in Honeycomb Paperboard Production

Cellular production line quality problems caused by insufficient precision and poor stability in machinery manufacturing.

To produce high-quality honeycomb paperboard, you must have a quality paper core. The key to the quality of the paper core is not only that the length of the bee hole should be approximately equal, but also that the glue sticking the two layers of paper core should be firmly bonded and must not be degummed. Therefore, in the production of paper cores, the position of the glue roller must first be adjusted so that the dislocation distance between the two overlapping glue strips is kept equal. The larger the distance difference, the more unequal the honeycomb edge length. According to the requirements of the packaging industry standard BB/T0016-999, the bees must have a positive six-sided deformation, but none of the current core production equipment can meet the standard, mainly because the two overlapping adhesive strips cannot control the extension of the tape when it is wet. , more unable to measure. So bees can only be hexagonal, even irregular polygons. However, when paper cores are produced, if they can be taken seriously, the distance of the strips can be adjusted strictly according to the process requirements, and relatively good products can be produced.

The key to the quality of the paper core is the adhesiveness of the adhesive strip. Once degummed, it means scrapped and the combined composite paper is also scrapped. Moreover, many unfavorable factors brought about by the shutdown process can cause a long period of cardboard scrap, resulting in a large loss. . Therefore, the formulation and use of glue must be meticulous, but also have to grasp the weather temperature and changes in wet and dry weather. When paper core production, degumming is invisible and intangible. Once found in the later production, it has actually caused a small loss, it is best to carefully check after cutting through the paper cutter and found that the degumming is removed immediately to minimize the loss.

When cutting a piece of paper: The paper core strip must be operated strictly according to the thickness of the cardboard. If the thickness of the paper strip is uneven or the cross section of the paper core strip is a parallelogram, the paperboard will also be compounded to produce defective products and waste products. To cut a qualified paper core, you must have a precise paper cutter. Better domestic products such as Shanghai Shen Wei Da automatic paper cutting machine.

Regardless of whether the core production or the board compounding is a single assembly line, the single stand is usually welded with angle steel and channel steel. The process of welding deformation takes a long time. Generally, the problem of deformation is solved by “natural aging” or “artificial aging”. The so-called “natural aging” means that the welding part is placed in the air for more than half a year, so that the internal gravity of the steel structure is naturally balanced to reach the maximum value of deformation. Processing. "Artificial aging" puts mechanical parts in the fireplace, and the natural cooling from high to low temperature balances the internal gravitational force of the parts. Relative dimensions after installation of mechanical parts are a constant value and are suitable for adjustment and adjustment. The honeycomb paperboard production line currently ordered by the market has to be delivered and used at the latest three months at the latest. When used, some mechanical components, especially the adjustment and disassembly of the rubber roller and the rubber roller, are very difficult and affect the quality of the product. Reduced machine life.

Whether it is gluing on paper cores or sizing on paperboard composites, it is the core of honeycomb paperboard production. When the amount of glue is small, degumming will lead to waste, the amount of glue will not be pulled, the water content of cardboard will be high, and the finished paperboard will be too soft. Can't afford to cut constantly. Therefore, the rubber roller and the rubber roller must be flexibly adjusted. At the same time, the two rollers must be ground. The distance between the two rollers must be maintained at a constant value. If the frame is deformed or the distance between the two rollers is different, the cardboard is produced. At that time, in addition to the formation of scrap, due to excessive glue on the cardboard, water marks will appear after drying, which will damage the appearance. One reason for the formation of watermarks is that they minimize the number of downtimes during the continuous production of the board. If there is glue flowing from the wave basin to the paper when it is stopped, or when the paper stays on the rubber roller, the time is slightly shorter. Long, water marks will also appear.

In the process of paperboard composite, the paper core and the facial paper sometimes misplaced, that is, the paper core paper misaligned. After dislocation, it must go a long distance to reset, resulting in material waste. "Running deviation" and "misplacement" are closely related to the adjustment of machinery. Although the cardboard production line has a deviation correction limit device, when installing and debugging the assembly line, it must be noted that the center line of the equipment must be the same as the center line and center line of the paper core. on-line. In the production process, we must pay attention to deviation at any time and make adjustments at any time. Try to make paper cores and face papers overlap, so as to reduce waste.

With regard to the problem of high moisture content in paperboard, this is a common problem in domestic equipment. Many honeycomb paperboard manufacturers have to move the paperboard from the production line to the sun to expose them to sunlight. As a result, the paperboard is raised on one side and the paperboard is pressurized. Creases, damage to the honeycomb structure affect the quality of the cardboard. In case of continuous rainy weather, the cardboard will be mildewed. The cardboard must be cut horizontally at a fixed length. Whether it is a trowel or a thin blade, cross-cutting cardboard with a high moisture content will also cause troubles. It is not tearing, that is, trimming is rough and cannot be cut neatly. To solve the drying of the board, only use the oven to complete.

(to be continued)