Oversized opening solution after box forming

At present, people not only have high requirements on the intrinsic quality of products, but also pay more attention to the packaging of products. On the other hand, producers are also paying attention to packing their own products and trying to improve their product quality. Therefore, the packaging box should not only have bright colors and generous design, but also require that the carton be beautifully molded, squared, indented lines are clear, smooth, and not burst. However, in the production process, there are often some thorny problems. For example, after the packaging box is formed, the open position is too large and has been puzzling the enterprise. This is particularly true of pharmaceutical packaging cartons, which face thousands of sick patients. The poor packaging of packaging cartons directly affects the trust of consumers in the products; at the same time, the number of pharmaceutical packaging boxes is small and the specifications are small. The corresponding solution is very difficult. Based on my actual work experience, I have discussed with my colleagues the situation that the opening of the medicine packaging box has become too large after molding.
The reasons for the opening of the opening after the carton is formed are various. The decisive factors are mainly in two aspects:
1. Reasons on paper (including the use of roller paper, the moisture content of the paper, the fiber direction of the paper);
2. Technological reasons, such as surface treatment, fabrication of templates, depth of indentation lines, and imposition format. If these two major problems can be solved well, then the problem of carton forming can be solved accordingly.
First, the paper factor is the main reason for the formation of carton we know that most of the time is the use of roller paper, and some imported roller paper, due to the site and transport problems, require cutting in the country, after the cut Paper storage time is short, coupled with some manufacturers' cash flow is difficult to sell now buy, so most of the paper after cutting is not completely flat, there is still a tendency to curl. If you directly purchase the cut sheet, the situation is much better, at least it has a certain storage process after the cut. In addition, the moisture content of each sheet must be evenly distributed, and must be balanced with the ambient temperature and humidity. Otherwise, deformation will occur over time. If the length of the cut paper is too long and the moisture content on the four sides is larger or smaller than the water content in the middle, and the paper is bent when it is not used or produced overnight, in the process of using the paper jam, the day of cutting is good. Use, should not be stacked for too long, causing deformation of the paper.
The direct cause of the opening of the opening after the carton is formed is mainly the decisive factor of the fiber direction of the paper. Once the opening direction of the carton is parallel to the fiber direction of the paper, this kind of opening bulging phenomenon is very obvious, because the paper absorbs water during the printing process, after UV polishing, polishing, coating and other surface treatment, paper More or less deformation occurs in the production process. After the deformation of the paper, the tension between the surface and the bottom surface is inconsistent. Once the paper is deformed, the two sides of the paper are stuck and fixed when the carton is formed. After opening, the opening is opened too much.
Second, the process factor is also an important factor in the opening of color box molding openings. In the surface treatment of pharmaceutical packaging, UV glazing, laminating, polishing and other processes are commonly used. Among them, glazing, laminating, polishing, etc. are dehydrated through high-temperature paper, the water content is significantly reduced, and through stretching, part of the paper fibers Brittleness causes most of the surface-treated paper to deform. Among them, paper jams with a water-based machine covering more than 300 g, the situation of paper stretching is even more pronounced. Generally, there are 2-3 mm, and the products coming out of the film are inwardly bent. Generally, they have to be artificially corrected. Polishing product temperature should not be too high, generally controlled at 80 °C or less, after polishing usually have to place about 24 hours, until the product is fully cooled to the next process to produce, otherwise there will be a burst line situation.
2. In the die-cut version of the production process also affect the carton molding, manual version of the production is relatively poor, the various specifications, cutting, machete grasp is not good, the general manufacturers are basically eliminated manual version and use laser knife die Company made beer board. However, sometimes the size of the anti-locking buckle and the height line are set according to the gram of the paper, whether the specification of the cutting line is applicable to all the paper thicknesses, and the depth of the die cutting line also affects the effect of the carton forming.
3. In order to ensure a good indentation effect, in addition to the use of suitable indentation lines and high-quality steel knives, attention should also be paid to the adjustment of the machine pressure and the selection of the strip and the specifications of the installation. General printing manufacturers use the form of a sticker board to adjust the depth of the indentation line. We know that the general texture of the cardboard is loose and its hardness is not enough. The effect of this is that the indentation line is not very full and durable. If the imported bottom mold material can be used, the indentation line will be more full.
4. In the imposition format to find ways to solve the paper fiber direction of the main way, in today's market, the direction of the paper fiber is basically fixed, mostly in the longitudinal direction of the fiber, and the color box printing is a certain number of fight in a Zhang Kaikai, three open or four open paper printing, the general situation is that without affecting the quality of the product under the premise of a piece of paper to fight as much as possible, because it can reduce the waste of materials, thereby reducing costs, in this way The calculated price can be accepted by customers. However, considering the factors of the imposition without regard to the direction of the fiber, the formed carton will not meet the requirements of the customer. In general, the direction of the fiber and the direction of the opening of the paper Vertical is the best.
In summary, the opening of the carton after the opening of the carton is too large. As long as we carefully consider the contents in the production process, and try to avoid the paper and the process, the problem will be solved easily.