At present, the carton industry is facing a situation where raw material prices are rising, carton prices are difficult to control, and profit margins are getting smaller and smaller. In order to reduce carton costs and occupy more market share, many carton companies have moved a lot on the selection of raw paper Brains-use low-gram weight and low-grade base paper for production. However, due to the limitations of the workers' technical qualities and the existing production equipment, it is difficult to produce satisfactory products. Poor adhesion, severe bending, and soft cardboard often occur. The carton factory is at a loss for this. So, is there a solution? This article will take the transformation of a carton enterprise as an example to explain how to carry out "small reforms" according to the paper consumption and equipment structure of the enterprise, so as to tap the potential of product quality improvement and make the enterprise burst into vitality.
For example, a company uses a domestic five-layer cardboard line with good on-site management. The entire cardboard production workshop is organized and the equipment maintenance is not bad, but from the perspective of the cardboard produced, it is generally soft? The flatness is poor and The phenomenon of serious corrugation of corrugation-the thickness of the five-layer cardboard measured with a vernier caliper is less than 7 mm. Most of the paper they choose is between 110 grams and 125 grams. For some cartons with special requirements, 130 grams of corrugated paper or 110 grams of sizing paper are used. For each shovel board, 9 combined fans must be used. Air blow treatment, blow away the moisture in the cardboard to increase the hardness of the cardboard. Some cardboards need to be stacked with heavy objects because of severe bending, causing wrinkles and creases on the cardboard surface. The overall quality of the product feels poor. The following is a one by one analysis of this production problem and find out its solution.
After a comprehensive analysis of the product, there are four reasons for these conditions: First, the cardboard is too soft due to the large amount of glue? Serious bending? The height is not enough; The second is the two-layer cardboard on the previous flyover. It is not suitable for the current production of low-gram weight paper, which will cause certain damage to the formed corrugations; the third is the inappropriate paper gap of the double-layer rubber coating roller; the fourth is the gravity roller on the hot plate of the compound machine Not adjusted correctly as required.
Analysis, research, implementation and solution
Judging from the current equipment situation and workers' usual operating habits, there are certain defects in the partial structure of the equipment, because the structure of the machine is still designed according to the production of heavy cartons, and cannot meet the needs of low-gram paper production. Therefore, it is necessary to change the paper-passing method of the flyover, so that the low-gram two-layer corrugated cardboard can minimize the damage and avoid the deformation of the corrugated paper during the paper-passing process. For this reason, some changes have been made to the paper guide on the flyover to change the original paper preheating method. When inspecting the glue roller of the double-layer glue machine, in addition to finding defects on the equipment, it also found misunderstandings in operation. Because of the mistakes in the original glue rollers, the cardboard often foamed and degummed. In order to avoid the occurrence of degumming, the workers blindly increased the amount of glue and made the moisture content of the cardboard seriously exceed the standard. This is a complete misunderstanding, and many manufacturers may have this misunderstanding. When measuring the paper gap between the two sets of glue rollers and the platen roller of the double-layer coating machine, it was found that the paper gap between the two groups of glue rollers was significantly smaller than the actual requirements. main reason.
According to the problems found above, firstly, we propose to transform the rubber-coated anilox roll, and require the processing unit to process according to our technical requirements, and to visit the processing unit to supervise the processing quality. After installation and commissioning, it has been confirmed by the production that due to the change of the anilox roller, the effect of gluing is obviously different. The width of the gluing is basically controlled between 1 mm and 1.5 mm of the corrugated peak, and the amount of gluing is reduced by more than half. And the size coating is quite uniform. Finally, the gravity rollers on the hot plate were carefully adjusted according to the requirements. Looking at the quality of the cardboard produced, the phenomenon of fluting was gone, and the thickness of the cardboard was increased to 7.7 mm, which not only eliminated the blowing process, but also the cardboard The hardness is obviously enhanced, and there is no need to pile up cardboard with heavy objects.
The equipment is still the original equipment, and the original paper is used, but the products produced are completely different. Facts have proved that domestic-made machines can also produce first-class products. Scientific transformation of equipment? Accurate adjustment is an important factor to ensure product quality and reduce production costs.
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