Paper cups, paper trays, and paper bowl disposable catering containers have been widely used all over the world. The market is very broad and the amount of use is huge. Due to the requirements of environmental protection, food and beverage lunch boxes will gradually use environmentally friendly water-based inks for printing blanks. , And then carry out the forming process of paper cups, paper trays and paper bowls to complete the production process from paper to finished products.
Xi'an Heiniu Machinery Co., Ltd. first developed a unit-type flexographic printing machine in China. After more than ten years of research and exploration, it has formed a strong technological advantage and rich practical experience. In the past three years, with paper cups, paper trays, paper The bowl industry gradually adopts the process of flexographic printing die-cutting blank making, and professionally developed paper cup and paper tray flexographic printing punching machines.
This machine integrates the original decentralized process into a one-time process. Adopt flexible water-based ink printing to meet the requirements of environmental protection. In addition, continuous printing and punching are used to make one breath. The new punching positioning mechanism has declared a national patent, and the whole machine structure has also declared a national patent. This patented technology has changed the traditional method, so that the current world can reach 250 times / The speed of minutes is increased to 400 times / minute. So as to reach the world's leading level in the industry, it will make a leap in the production process of paper cups, paper trays and paper bowl blanks, which is 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 sheet-fed laminating paper to produce with an offset printing machine. First, offset printing is printed with petroleum-based ink, which has certain toxicity and odor. In terms of paper cups, paper trays and paper bowls; their shapes are all fan-shaped, such products are produced with a single sheet of paper, and the continuous web method is produced, which wastes 4.2% more material, resulting in waste in the production process Big. Such as using 4000kg of raw paper per shift, wasting 200 kilograms of paper, 7500 yuan per ton of coated paper, which was a waste of 1500 yuan, and the turnover and stacking of printed products, manual cleaning after die-cutting, which took time and consumed the factory The ground consumes labor and energy. Although it is impossible to liquidate its value in detail here, but if you are an industry insider, you will know it well.
In the past two years, in order to meet the requirements of environmental protection, unit-type flexographic printing presses have entered the paper cup, paper tray, and paper bowl industries, and can also achieve continuous printing and continuous die cutting. Each set, such as a tool arranged for five weeks and eight weeks, can produce 40 pieces per revolution of the tool, grinding a total of 10 million revolutions three times, producing a total of 400 million pieces of paper cups, and its cost per piece is also 0.04 points. Being squeamish, there is a possibility of damage if you are not careful, it will be unbearable. In addition, the circular die-cutting cutters of fan-shaped pieces are difficult to complete the finished products and rejects in the production process, and the mechanical speed cannot be opened. The collection failure rate is extremely high, so the flexographic connection process from unwinding of the coated paper to printing and continuous circular die cutting is not accepted by the industry due to its high cost, difficulty, and only the slightly larger die cutting area. Individually used (such as square plates used by KFC and McDonald's).
The market is a tremendous force to promote technological progress. In the past year, domestic manufacturers have accepted and used printed coils and the method of secondary die cutting. The secondary upper die cutting line is driven by a servo motor, and the photoelectric eye alignment is completed by the method of flattening and punching. This method is gradually recognized and adopted by the bank. However, this process and the printing process are carried out in two times, and there are more production links. At present, all positioning is completed by photoelectric head tracking and servo-driven feeding. When feeding and punching each paper cup unit, the maximum can only be It can reach 250 times per minute, claiming to be 300 times. If it is flattened with a wooden die cutter, it can only be cut at most 70 times per minute, and it has to be removed from the line, which is not very efficient. Because the height of a single paper cup is only about 90mm, the speed of paper is only 22.5 meters per minute when punching 250 times per minute. If flat die cutting is used, the continuous 4 per board is only 360mm, and 70 times per minute can only reach The paper speed is 25.2 meters. If such a punching speed is connected with the printing machine, in addition to the difficulty of control, it will also seriously affect the normal operation of the printing machine, because the flexographic printing can not reach the speed of 30 meters or more. Problems such as unstable overprinting.
How to change the traditional intermittent paper positioning method at home and abroad, so that the frequency of paper feeding per minute can reach 400 ~ 500 frequency, and each positioning is stable and accurate to effectively combine printing and punching, so that printing and punching The two procedures are completed at one time. After two years of exploration by our company, this problem has now been overcome. At the Guangzhou label exhibition in March 2008, our company exhibited the first prototype machine with a punching speed of 400 times per minute. After optimizing some designs, it reached 500 times per minute during the limit test in the factory with little mechanical vibration The printing is stable and the waste discharge is normal and continuous. During industrial production, it will guarantee 350 to 400 times per minute for production operations.
Due to the company's rich experience accumulation, we have adopted a mechanical intermittent mechanism for positioning, and its positioning accuracy can be guaranteed to reach ± ​​0.2mm level at high speed, which is faster than servo drive positioning accuracy at high frequency. Now the company has applied for a patent for the agency, and has also applied for a patent for the continuous production of the whole machine. In order to make people in the industry not only a choice of punching method, we are also about to introduce a method of die cutting with a wooden die cutter. Both methods have their advantages and disadvantages. Each operation can only be carried out line by line during punching. Although the tool life is very long, each group of punching knives is 40,000 to 50,000 yuan at a time. However, the product has a good shape and no manual waste is required. Smaller production batches are more suitable. For wooden die cutting, we adopt the method of 3 to 4 rows per circumference of the printing unit. The length of each die cutting is between 300mm and 400mm, and it reaches 150 times per minute. Later, there was a process of manual waste tearing and cleaning, but it had the characteristics of low tool cost and faster variety. But 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 method for paper cups, paper trays and paper bowl production enterprises, reducing consumption and increasing efficiency, energy saving and environmental protection, and will make your business at the commanding heights of competition. In order to win more profit space and competitive advantage for you.
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