Introduction of the most popular innovative paper

2022-10-02
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Innovative paper cup flexographic printing die-cutting process introduction

paper cup, paper tray, paper bowl disposable catering containers have been widely used all over the world. The market is very broad and the use volume is huge. Due to the requirements of environmental protection, food and beverage lunch boxes will gradually adopt environmental friendly water-based oil ink for printing and blank making, and then carry out the forming process of paper cup, paper tray, paper bowl, and complete the production process from paper to finished products

Xi'an Heiniu Machinery Co., Ltd. first developed the unit type flexographic printing machine in China. After more than ten years of research and exploration, it has formed strong scientific and technological advantages and rich practical experience. In recent three years, with the gradual adoption of flexographic printing die cutting process in the paper cup, paper tray and paper bowl industry, it has professionally developed the paper cup and paper tray flexographic printing punching machine

this type of machine integrates the original decentralized process into a one-time process. Flexible water-based ink printing is adopted to meet the requirements of environmental protection. Moreover, continuous printing and punching are adopted to make it complete at one go. The new punching and cutting positioning mechanism has applied for the national patent, and the whole machine structure has also applied for the national patent. This patented technology changes the traditional method, so that the speed in the world can reach 250 times/minute, and is increased to 400 times/minute. Thus, it has reached the world leading level of the industry, which will be a leap in the production technology of paper cups, paper trays and paper bowl blanks, and a revolution in traditional technology

first of all, we make the following comparison between the currently commonly used methods and new processes:

the traditional method is to use offset printing machine to produce single sheet coated paper. First, offset printing is printed with petroleum ink, which has a certain toxicity and smell, and is accelerating the elimination. Another is to reserve water knives during die-cutting of single sheet paper, for paper cups, paper trays and paper bowls; Its shape is fan-shaped, and some foreign peers have made new and obvious progress in the research and development of deformation measurement technology. Such products are produced by sheet fed and continuous web method, which wastes 4.2% more materials, resulting in a large waste in the production process. For example, 4000kg base paper is used in each shift, 200 kg more paper is wasted, and 7500 yuan per ton of coated paper is wasted, that is, 1500 yuan is wasted. In addition, the turnover and stacking of prints, and the manual cleaning after die cutting consume time, land, labor and energy. Although its value cannot be liquidated in detail here, I think you will know it if you are an insider in the industry

in the past two years, in order to meet the requirements of environmental protection, the unit type flexographic printing machine has entered the industry of paper cups, paper trays and paper bowls, and can also realize continuous printing and continuous die cutting. However, due to the complex manufacturing of its die-cutting tools, the cost is up to 150000 yuan per set. For example, if one tool arrangement reaches five weeks and eight weeks, each tool can produce 40 pieces per turn, with a total of 10million rounds of grinding for three times, and a total of 400million pieces of paper cups can be produced, The cost of each piece of new material industry in Shenzhen has increased from 59billion yuan in 2010 to 150billion yuan in 2015, with a score of 0.04. Such knives are delicate and may be damaged if you are not careful, which will be unimaginable. In addition, the circular die-cutting tools for sector pieces are difficult to complete the finished products and waste removal during the production process, and the mechanical speed cannot be opened. The collection failure rate is very high, so the flexographic printing connection process from film coated paper reeling to printing and continuous circular die cutting is not accepted by the industry due to its high cost, difficulty, and only a few varieties with slightly larger die cutting area are adopted (such as the square plate used by KFC and McDonald's)

the market is a huge force to promote technological progress. In the past year, domestic manufacturers have accepted and adopted the method of printed coiled materials and secondary die cutting. The secondary upper die tangent is driven by the servo motor, and the photoelectric eye is aligned. The paper cup, paper tray and paper bowl are processed by the method of flat pressing and punching. This method is gradually recognized and adopted by the bank. However, this process and printing process are carried out in two times, with more production links. At present, all positioning is completed through photoelectric head tracking and servo drive feeding. During the feeding and punching operation of each paper cup unit, it can only reach 250 times per minute at most, which is claimed to be 300 times. If it is flattened and die-cut with a wood die cutter, it can only reach 70 times per minute at most, and it also needs to be removed from the production line, which is not efficient, Because the height of a single paper cup is only about 90mm, when punching and cutting 250 times per minute, the paper feeding speed is only 22.5 meters per minute. If you use flat pressing and die cutting, the paper feeding speed of 4 consecutive plates is only 360mm, and 70 times per minute can only reach 25.2 meters. If such punching and cutting speed is connected with the printing machine, it will not only be difficult to control, but also seriously affect the normal work of the printing machine, Because flexographic printing cannot reach a speed of more than 30 meters, printing quality will produce problems such as dry plate, overprint instability and so on

how to change the traditional intermittent paper feeding positioning method at home and abroad, so that the paper feeding frequency per minute can reach 400~500 frequencies, and each positioning is stable and accurate, so as to effectively combine printing and punching, so that the two processes of printing and punching can be completed at one time. After two years of exploration by our company, this problem has been solved. In March, 2008, at the Guangzhou label exhibition, our company exhibited the first prototype, with a punching speed of 400 times per minute. After optimizing the partial design, the limit test was carried out in LabVIEW, a virtual instrument software development tool based on graphical programming language launched by American NI company. It reached 500 times per minute, with small mechanical vibration, stable printing, and normal and continuous waste discharge, During industrial production, 350-400 production operations per minute will be guaranteed

due to the company's rich experience, we use mechanical intermittent mechanism for positioning, and its positioning accuracy can reach the level of 0.2mm at high speed, which is faster than the high-frequency positioning accuracy of servo drive. Now we have applied for a patent for this institution and for the continuous production of complete machines. In order to make people in the industry not only a choice of punching method, we are also about to launch a method of die cutting with a wooden die-cutting knife. Both methods have their own advantages and disadvantages. During punching, each operation can only be carried out one line at a time. Although the service life of the cutter is very long, the one-time input of each group of punching cutters is 40000-50000 yuan, but the product has a good chip type and does not need to be cleaned manually. It is more suitable to use the products with small specifications and large production batches. For wood die cutting, we use the new steel bar bending experimental machine produced by our company, which is a four row method designed for the new standard gb/t1499.2 ⑵ 018, The length of each die cutting is between 300mm and 400mm, and it can reach 150 times per minute. This method has a process of manual tearing and cleaning after the product is offline, but it has the characteristics of low cost of cutting tools and rapid variety change. However, no matter which method is selected, the printing speed can reach 35m~60m or higher, and there will be no flexographic printing failure

with the gradual promotion and use of this type of machine, it will provide an efficient production mode for the production enterprises of paper cups, paper trays and paper bowls to reduce consumption, increase efficiency, save energy and protect the environment. It will put your enterprise on the commanding height of competition and win you more profit space and competitive advantages

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