The slitting machine can be roughly divided into three methods: round knife slitting, extrusion slitting, and flat knife slitting.
        Round knife slitting
        Circular knife slitting can be divided into tangential slitting and non-tangential slitting. The tangential slitting is to cut the material from the tangential direction of the upper and lower disc knives. This slitting is convenient for the knives. The upper disc knives and the lower disc knives can be easily adjusted directly according to the slitting width requirements. Its shortcoming is that the material is easy to drift at the slitting, so the accuracy is not high, and it is generally not used now.
The non-tangential slitting is that the material and the lower disc cutter have a certain wrap angle, and the lower disc cutter falls to cut the material. This slitting method can make the material less prone to drift and high cutting precision. However, the adjustment of the knife is not very convenient. When the lower disc cutter is installed, the entire shaft must be removed. Round knife slitting is suitable for slitting thick composite membranes and paper sheets.
        Extrusion slitting
        Extrusion slitting is not common in domestic slitting machines. It is mainly composed of pneumatic knives that are synchronized with the material speed and have a certain angle of the bottom roller and easy adjustment. This slitting method can not only cut thin plastic films, but also cut thick paper, non-woven fabrics, and the like. It is a convenient way to cut. It is a development direction of the slitting machine.
        Flat knife slitting
        Just like a razor, a single-sided blade or a double-sided blade is fixed on a fixed blade holder, and the knife is dropped during the running of the material, so that the knife cuts the material longitudinally to achieve the cutting purpose.
         There are two ways to cut the razor: slitting and slitting.
        The grooving slitting is when the material is run on the sipe roller, the cutter is dropped in the groove of the sipe roller, and the material is longitudinally cut. At this time, the material has a certain wrap angle in the sipe roller, and the drift phenomenon is not easy to occur. When the PP film or the narrower edge film is slit and cut, the slitting method is often used to improve the slitting efficiency. However, for the hanging and slitting, its disadvantage is that it is inconvenient to the knife.
        Suspended slitting is when the material passes between two rolls, the razor falls to cut the material longitudinally. At this time, the material is in a relatively unstable state, so the cutting accuracy is slightly worse than the cutting, but the cutting is slightly different. The method is convenient for the knife and easy to operate. The flat cutter is mainly suitable for slitting thin plastic films and composite films.

        In the modern packaging industry, the slitting machine is a relatively important equipment that is often used before and after printing. The raw materials are mainly cut before printing, such as paper, plastic film and so on. This is a process that raw material manufacturers must complete in order to meet the width requirements of packaging manufacturers such as customers. The slitting machine is used to divide the printing and composite film of a plurality of sets of patterns of a fixed width into a finished film roll to adapt to the subsequent automatic packaging and bag making process.
        With the improvement of flexible packaging automation and consumer goods manufacturers focusing on reducing the inefficiency and pollution of intermediate links, some manufacturers have gradually changed the process and replaced manual packaging with more automated automatic packaging lines. As the demand for coils continues to increase, the position of the slitter is becoming more and more important, and higher requirements are placed on the efficiency of the slitter.
        When it comes to the efficiency of the slitter, many people think that the efficiency of the slitter is only related to the speed of the slitter. Actually, I think that the efficiency of the slitter is related to the following factors: slitting speed, finished product. Rate, non-operation time, stability, etc. Although the cutting speed is an important indicator of the working efficiency of the slitting machine, if the yield is low, not only will the work efficiency of the whole machine be low, but also the cost will increase. Similarly, if the non-operation takes a long time, such as: adjusting the machine, setting the tool, changing the tool, refueling, connecting the joint, changing the volume, processing the problem, etc., it takes a long time to improve the speed of the slitter, and it makes no sense. It is. Not to mention the stability of the slitting machine, not only will it affect the working efficiency of the slitting machine, but also affect the quality of the product, and it will cause trouble and unnecessary waste to the next process. Therefore, the efficiency of the slitter is a comprehensive concept.
        In the process of slitting, the stable tension system is an important indicator to ensure the quality of the product. It controls the mutual tension between unwinding, drawing, slitting, winding, etc., so that the slitting material is always in the cutting process. A steady state. If the tension is properly controlled, it can avoid the deformation and drift of the raw materials during the process of speeding up and slowing down the machine. Generally, the unwinding tension is slightly larger than the sum of the reel tensions. Most of the previous slitting machines use magnetic powder clutch to control the tension, but the magnetic powder clutch speed can not be high. It is easy to cause high-speed friction of the magnetic powder during operation, which causes high temperature and shortens its life. In severe cases, it will be stuck and the machine operation will be blocked. With the development of science and technology, the use of servo drive technology, most of them now use vector variable frequency motor to control the tension system of the slitting machine. The automatic detection of the pendulum roller makes the man-machine interface intuitive, the tension system is more stable and reliable, and easy to operate.

        The flatbed printer is an innovative color printing device, also known as the universal flatbed printer. It is not subject to any material restrictions and can be color photo-printed on the surface of wood, glass, crystal, PVC, ABS, acrylic, metal, plastic, stone, leather and so on. Whether it is a simple block color pattern, full color pattern or pattern with excessive color, it can be printed at one time without plate making, without printing and repeating color, rich and colorful, realistic effect, waterproof image, sunscreen and abrasion resistance. It does not fade, the operation is simple and convenient, the printing image speed is fast, it fully meets the printing industry standard, and the application field is very wide. Below, Dongguan Kehui compares the advantages and disadvantages of digital inkjet technology and traditional printing.
        Digital printing technology has broad market prospects due to its advanced technology and huge environmental potential. In the field of inkjet digital printing, the leading digital inkjet printing technology, with its huge breakthrough in technology and great advantages in energy saving and environmental protection, has challenged traditional printing and is expected to have a place in the entire printing industry chain.
        "Offset grade" digital inkjet printing
        When it comes to digital inkjet printing, it has to be compared with the current mainstream traditional printing methods. Digital printing has no restrictions on printing volume, and it has the advantages of flexibility and simplified printing. However, the digital printing equipment currently in common use is far less than conventional printing in terms of production capacity, and the cost is relatively high. At the same time, there is a certain gap between the quality and the traditional printing effect. Therefore, at present, traditional printing still occupies the vast majority of the printing market.
        The emergence of digital inkjet technology, with its dramatic innovation, broke through the limitations of digital printing, and is expected to greatly expand the digital printing market. Digital flatbed printers are a combination of traditional printing and digital printing. It not only maintains the flexibility of digital printing, but also combines the high quality and high productivity of traditional printing. It has been estimated that the current printing and printing costs of less than 5,000 copies, the overall efficiency and cost of digital inkjet printing technology has outweighed the traditional offset printing, which greatly increased the cost demarcation point between digital printing and traditional printing. From the aspects of cost, media adaptability, print quality and productivity, it can be compared with traditional printing.
        Variable printing flexibility subverts traditional printing
        In addition to the green prospects and low-carbon advantages of digital inkjet printing seen in the production process, the advantages of digital printing are even more obvious when examining the entire printing industry chain. With continuous inkjet technology for variable printing, the printing industry can adopt variable printing and on-demand publishing, and the prospects for reducing carbon emissions in the printing industry are also very broad.
        The biggest advantage of digital printing compared to traditional printing methods is its flexibility. Digital printing does not require plate making, there is no limit on the amount of printing, eliminating all the prepress processes of traditional printing. It only needs to input the file as usual, and it can be printed with one computer.
         On-demand printing can greatly adapt to market changes and reduce waste in the printing industry. With variable printing, printing companies can print a small amount of products on the market. If the sales are good, they can immediately increase production and print again according to customer needs, reducing a lot of waste. At present, in some countries with relatively small populations in Europe and America, on-demand printing has become more popular.

        The so-called green printing refers to the printing method that uses environmentally friendly materials and processes, produces less pollution, saves resources and energy in the printing process, and is easy to recycle and recycle after the printed materials are discarded, which can be naturally degraded and has little impact on the ecological environment. Green printing requirements are coordinated with the environment, including the use of environmentally friendly printing materials, clean printing production processes, the safety of printed materials to users, and the recycling and recycling of printed materials.
        The significance of green printing:
        Promoting green printing is of great significance to the printing environment, the economy and the company itself.
        The promotion of green printing first focused on the health of printers. The green printing materials and the reduction or even elimination of toxic and harmful gases during the operation have directly improved the quality of the working environment of the printing workers and effectively ensured their physical health. As an industry closely related to life, printing is closely linked with people's agenda life. Everyone is exposed to a large number of printed materials every day. The implementation of green printing has greatly reduced the "hidden dangers" in the usual contact with printed materials. Green printing products are used by people. More assured. In addition, green printing has greatly promoted the goal of China's printing industry to achieve energy-saving emission reduction and low-carbon economy, and overall improved and improved the environmental protection level of China's printing industry.
        From an economic point of view, the promotion of green printing is a process of re-adjusting the industrial structure. In this process, the company practiced green printing, indirectly changed its production mode, and gradually changed the entire printing industry from extensive to intensive, changing the printing industry's production methods. It is reported that there are more than 300 green certification enterprises in the country, accounting for 0.15% of the country, but its output value accounts for about 4.5% of the whole industry. Another 60% of the printing enterprises above designated size use computerized plate-making technology and digital workflow. After adopting this technology, the comprehensive cost of environmental protection for printing enterprises is reduced by about 10%. The statistical data of sampling enterprises show that during the green printing process, The output value per 100 million yuan is about 355,000 kWh, saving about 21.7 tons of paper consumption and about 1 ton of ink. The economic efficiency and energy conservation and consumption reduction level of the printing enterprises have been greatly improved.

        Traditional printing presses have matured over a long period of time, and the preservation of their equipment and the cost price of printed products have been recognized. When traditional printers explored where the future is going, they saw high-speed inkjet printing, but when comparing high-speed inkjet printing with traditional printing from the perspective of quality and cost, they often couldn't give up their old love and had to wait and see. The advantages of zero-inventory, on-demand production, and environmental protection for high-speed inkjet printing are submerged under the traditional low-cost and high-quality optical ring.
        When it comes to the resistance of high-speed inkjet printing, the opinions of various suppliers coincide. At present, it is difficult to find products in the inkjet equipment market that take into account equipment prices, ink consumables, use costs, and environmental protection requirements. Advocating environmentally friendly UV inkjet technology, the price and the cost of use are astounding; and the economical and practical ordinary inkjet technology will have an adverse impact on the environment. In addition, end markets and end users place higher demands on substrates, such as materials that are extremely smooth on the surface, materials that are difficult to adhere to, or how special materials are printed. In short, to take full advantage of the advantages of inkjet printing, you can use inkjet printers. At the same time, the concept of saving resources and environmental protection can truly manage the digital printing business.
        In the context of economic benefits leading to today's social activities, higher costs are another resistance in the development of high-speed inkjet printing. High-speed inkjet printing technology has just started in China. Both the purchase price of equipment and the price of consumables have led to high cost of high-speed inkjet printing products. Compared to the low cost of offset printing in China, the cost of high-speed inkjet printing has no advantage in the printing market.
        Nowadays, high-speed inkjet printing technology is still imported, and the successful case of copying foreign high-speed inkjet printing for China will cause soil and water dissatisfaction. The cost of high-speed inkjet printing in foreign countries is almost the same as the cost of traditional printing in the local area. The downstream of the printing industry chain is highly recognized and actively promoted for high-speed inkjet printing, and the degree of e-commerce development is relatively mature. In these respects, China still has A long way to go. Localize the operation of high-speed inkjet printing to meet the needs of China's current market, so that the reality and the reality can get closer.