For printers, program-controlled paper cutters are necessary machinery. Program-controlled paper cutters are used to cut paper before and after printing. The program-controlled paper cutter is easy to operate and has no special requirements on the environment. As long as the power is supplied, it can work normally. After using the program-controlled paper cutter for a long time, more or less problems will occur, such as no action of the cutter, abnormal noise, and no action of the pusher. Some users reported to us that the newly installed paper cutter cut a knife, and the blade had a problem of chipping.
        Below, I will give you a brief analysis of the cause of the chipping of the cutter of the program-controlled paper cutter. The selection of the blade sharpening angle, the quality of the sharpening, and the sharpening clearance time of the blade affect the flatness and smoothness of the paper cutting edge. Generally, the angle of the blade is 19 °. If the cut paper is hard, you need To increase the angle of the blade, if you want to improve the sharpening quality of the blade, make sure that the coolant is sufficient during the sharpening to avoid the edge annealing. Before cutting, you can first polish the blade with a fine stone and apply soap and paraffin on the blade. This can not only improve the sharpness and smoothness of the cutting edge, but also extend the service life of the cutting edge, and the quality of the finished product is better.
        The reason for the chipping in actual operation is that the operator shortens the sharpening time, and the coolant is insufficient, which causes the edge to anneal and the width to be narrowed. The nut must be adjusted during installation to make the blade cut into the pad Blades, if the nut is not adjusted properly, and the cut is too deep, it will cause chipping.

         Paper cutter We know that this is a kind of post-processing equipment for paper products, but we don't know much about how the paper cutter is driven. At present, with the development of the paper processing industry, and people's application and demand for paper, the requirements for the cutting speed of the paper cutter are becoming more and more severe. This also reflects the importance of high-speed, wide-width paper cutters to the industry from the side.
         The paper cutter drive system on the market now has two parts, namely the drive reduction ratio and the drive system. These two parts have a great impact on the speed of the equipment. Therefore, when designing, these two parts will be paid special attention, which will improve the performance of the equipment as a whole.
         The transmission of the paper cutting machine is not only related to the working speed, cutting length, reduction ratio, and transmission accuracy. Under normal circumstances, the larger the reduction ratio, the better the cutting accuracy. In addition, in general, the time of the paper cutter working on the minimum cutting length is relatively short, you can make full use of the characteristics of the speed control system to allow the speed to exceed the rated speed to properly select the reduction ratio.

        The paper cutter is exactly what the name suggests. Paper cutting machine is an indispensable mechanical equipment of the printing plant, mainly used to deal with paper cutting needs in the early and late printing.
        The development of paper cutters has evolved from mechanical paper cutters to tape-controlled paper cutters, and to microcomputer program control, color display, full image operation guided visual processing, and computer-aided cutting external programming and editing production data cutting system , Making the paper cutting machine shorter preparation time, higher cutting accuracy, lower labor intensity, and safer operation. The operation of the paper cutter is simple, and the environment is also adaptable.
        Usually work is guaranteed in the workshop with a stable power supply. Generally, the paper cutter has an automatic switch system. As long as the paper is placed and the start button is pressed, the cutter will automatically rotate to cut the paper. There are also some advanced paper cutters that simply press the start button and the cutter will rotate to continue cutting. After the paper is shredded, press the stop button to stop the cutter from rotating and clear the paper scraps on the cutter in time.
        Now most of the paper cutters are equipped with overloaded power-off newspaper devices, that is, the motors of the paper cutters will automatically stop when they are overloaded and run hot. Stop using it for 20 to 30 minutes to allow the motor to cool. At the same time, the amount of input paper should be appropriately reduced when used again.

        Paper cutter is a kind of paper processing equipment. It has a wide range of applications in a series of paper and non-paper processing fields. It is a universal device. At the same time, paper cutters also occupy an important position in printing machinery products. Paper cutters are green paper processing equipment and indispensable production equipment for green printing enterprises. At present, the paper cutters on the domestic market mainly include automatic paper cutters, CNC paper cutters, automatic CNC paper cutters, electric paper cutters, and program-controlled paper cutters. Its main cutting system, positioning system, and paper pressing system are all close to the international advanced level, and the control system is gradually perfecting. Regardless of its appearance design, function, and operation performance, great progress has been made.
Despite the rapid development of China's paper cutter manufacturing industry in recent years, there are still gaps compared with some international brands, mainly in terms of automation control and cutting accuracy. Paper cutter operators generally report that foreign famous brand paper cutters are more accurate than domestic ones. In addition, investment and procurement, domestic hydraulic paper cutters are prone to inconsistent cutting dimensions and "mushroom edge" phenomena when opening materials. Therefore, many strong printing companies prefer to buy imported paper cutters at high prices, which also restricts the development of domestic paper cutters.
On the other hand, the paper cutters used by many domestic printers are still mechanical paper cutters equipped in the 1980s and 1990s. This paper cutter obviously has some problems: there is no high-precision size positioning system and size setting device for printers to visit, the accuracy is low, and it cannot meet the requirements for cutting high-end printed products; mechanical paper cutters have high impact, high noise, The safety mechanism is unreliable and easy to cause work accidents; the level of automation is low, there is no automatic paper feeding mechanism, the labor intensity is high, the security printing is low, and the production efficiency is low. In addition, due to the differences in regional economic development, the types of paper cutters used by printing companies in different regions are also different. For example, mechanical paper cutters in the central and western regions and small and medium-sized private printing companies are still widely used; large printing companies and printing companies in the southeast coastal areas mostly use hydraulic digital display and hydraulic program-controlled paper cutters; Sino-foreign joint venture printing companies and Banknote printing companies basically use imported paper cutters.
It can be seen that there are still many problems in the development of domestic paper cutters, but it is precisely such problems that herald a bright future for domestic paper cutters.
      (1) Large room for growth There is a considerable gap between the level of print consumption in China and the world ’s developed countries and the world average. There is a lot of room for the development of new technologies and industries in the printing industry, which will definitely promote the continuous development and innovation of paper cutter technology. .
      (2) Wide scope of application With the diversified development of modern printing and the expansion of the printing field, the cutting requirements from cutting, single-sided cutting, special processing and cutting layout design, as well as the cutting requirements of printed products such as glazing and lamination, etc. More and more diverse. These will inevitably make the paper cutter more perfect to complete more and more complex cutting processes.

1. Structure and working principle of paper cutter
It has a wide range of uses, large cutting specifications, strong flexibility and high production efficiency. The single-sided paper cutting machine is composed of a working platform, a paper pusher, a paper press, a cutting blade and a knife pad. The function of the work platform is to feed and discharge paper. The surface of the work platform is provided with steel balls and air holes arranged at a certain distance, which can form an air cushion between the paper stack and the platform, reduce the frictional resistance with the platform, and make the paper input and output light and free. The left and right wall plates of the paper cutter, the pusher and the platform should be at an angle of 90 ° to ensure accurate and consistent paper cutting. Whether the paper press can evenly press the paper stack also determines the accuracy of the paper cutting. Generally, the larger the pressure of the paper press, the better, which can prevent the deformation of the paper from affecting the cutting accuracy. The paper press has a screw structure, a spring structure and a hydraulic structure. The pressure of the hydraulic structure of the paper press is uniform and sufficient, and the adjustment and control are simple, and it is now commonly used. Its working principle is: the oil pump presses the oil in the oil tank into the oil cylinder to lift the piston, and pushes the push lever to push down the pressure of the paper press.
Second, the relationship between the blade edge angle and cutting accuracy
The smaller the blade edge angle, the sharper the blade, the higher the cutting accuracy, the lighter the work load of the blade holder, the less wear of the machine, and the lower the power consumption. However, the blade angle is too small, which is easy to wear and damage, especially when cutting hard and thick paper. Therefore, the most suitable blade angle is 22, and for harder materials, a double bevel blade with 24 ° / 22 ° is used to ensure cutting accuracy.
Third, the relationship between knife pads and cutting quality
The shim strip protects the blade and cuts off the "backing paper". Practice has found that after the newly installed blades and shim pads, the quality of the paper cut by the first knife is not necessarily good, and the edge of the backing paper may not be smooth, or even cut continuously. This shows that not only the flatness of the shim is required, but also a moderate scoring depth of no more than 0.5mm. The edge of the cut paper is straight and neat. Because the blade and the shim strip cannot be absolutely straight, in order to ensure a uniform cutting of the backing paper, a sliver of paper is often properly placed on the back of the shim to achieve the desired "cut" effect.
Fourth, the issues that should be paid attention to when using the paper cutter
1. Normally, good lubrication and maintenance should be performed on important parts of the machine such as the guide rail, the screw and the linkage paper presser, and maintenance should be performed in a timely manner to ensure the cutting accuracy of the machine;
2. Correct the machine to ensure that the paper is cut at a right angle. The pusher must not only be 90 ° to the platform, but also keep parallel to the cutter. The paper press should adjust the working pressure according to the soft and hard conditions of the cut paper to prevent the paper from cracking and displacement and ensure the cutting quality;
3. Use the blade correctly to improve the cutting accuracy of the product. After rough grinding with a blunt blade by an electric sharpener, "whetstone" and fine-grained abrasive cloth should also be used for fine grinding to eliminate edge burrs. When cutting, it is better to cut dozens of knives with soft paper such as waste paperboard and offset paper, run in the blade edge, eliminate the burr on the edge of the blade, and prevent the problem of chipping of the hard paper directly. In summary, correctly understanding and mastering the technical principles of paper cutting, and using the paper cutter scientifically and rationally, can not only reduce or avoid various failures, increase the service life of the machine, but also improve production efficiency and product quality.