In addition to the production of folding machines in a few countries such as Japan, Switzerland, the United States and China, the main manufacturers of folding machines are concentrated in Germany. The STAHL company in Germany and the folding machine produced by MBO Company all occupy the absolute dominant position in terms of variety and output, and it can be regarded as the best folding machine in the world in product level and manufacturing technology. The folding machines produced by the two companies are renowned in the world of the bookbinding industry for their exquisite styling and reliability.
First, STAHL and MBO folding machine structural features 1, building block module design using modular block design is a common feature of the two companies folding machine, public transport by the paper machine, the first folding group, the second folding group The third fold group, the fourth fold group, and the delivery machines are composed of separate units. Each individual unit has a variety of structural forms to suit the various needs of users. For example, there are stacking machines for paper feeding machines, machine-mounted paper frames, round bales, etc., and any type of paper feeder can be matched with the first folding set of the same specification. The first folding group is unique in form. From the second folding group, the structure can adopt both the folding knife type and the first folding combination to form a K-series hybrid folding machine; it can also adopt a fence type and a first folding group. Combining to form a T-Series fence type folding machine, it is also possible that the second folding group adopts a fence type and the third folding group adopts a folding knife type to form another type of hybrid folding machine. Like the paper machine and the paper feeder, there are also many forms, many models for the user to choose, fully shows the modular design of modular modules, versatile functions, can be quickly combined according to the requirements of the user order and many other advantages.
2. The use of special structures and techniques to ensure the reliability and stability of the machine In terms of special structures and special processes, the two companies have their own coups, and their effects can be described as parallels.
(1) The paper sub-systems manufactured by the two companies are all fairly reliable, and their structural principles are quite different. STAHL adopts automatic pneumatic paper separation and paper delivery piles, which are characterized by relatively high requirements for the manufacturing precision of pneumatic components. In the case of high feed rate, the stability of both is good.
(2) STAHL's folding roller and longitudinal axis adopts helical gear transmission to increase the meshing coefficient of gears and ensure the consistent line speed of the folding roller. MBO adopts flat belt transmission to reduce the transmission process. noise. Both of the respective disadvantages can be overcome to the utmost by improving the manufacturing accuracy. High-precision gears can greatly reduce the noise level, while the high-precision flat pulleys and the flexible and flexible folding rollers are made of flat belts with excellent texture and texture. It is also possible to reduce the stall between the folding rollers to a negligible value for the folding machine. This was fully confirmed on the folding machines produced by STAHL and MBO.
(3) Both companies use steel fine-tooth PU folding rollers, but STAHL uses a ring-type polyurethane sleeve with steel sleeves open, while MBO uses steel fine-tooth spiral polyurethane belts. Just as the advantages of their respective folding rollers advocated by the two companies, they have played a very good role in improving the accuracy of folding, reducing the slippage of paper, and reducing the noise of folding rollers.
(4) In addition, such as polyurethane suction roller, in addition to static paper, high-precision transmission bearings, transmission gear plate with universal joints, exquisite grid and lightweight and flexible folding knife, etc., high-precision folding The pages provide stable and reliable guarantees.
(5) The digital control system has been applied to the folding machine.
(6) Both STAHL and MBO have applied CNC technology to their products. STAHL's CNC system is named as DCT2000. It uses inverter and sensor technology for transmission control, paper suction cycle control, paper monitoring control, counting control and fault diagnosis display, etc. It is intelligent control software and advanced drive. The combined product of the system. MBO's CNC system was named "MPC system", which set up paper measurement, paper monitoring control and so on.
Convenient and reliable electronic technology has greatly improved the productivity of the machine, reduced the labor intensity, and also provided more additional features.
Second, the status and level of domestic folding machines Domestic manufacturers of folding machines currently have the Hunan Second People's Machine Factory, Shanghai Ziguang, Zihong, the second printing machine factory, Lishun and other enterprises, these plants have produced ZYH series Mixed folding machine. In addition, Tangshan Yuyin, Changchun Printing Machinery, Yibin Printing Machinery and other manufacturers also produce other series of folding machines, but the output is relatively small. At present, compared with internationally renowned products, home-made folding machines still have a large gap in their shapes, types, and performances. Hunan No.2 People’s Machinery Factory is a professional manufacturer of folding machines. The existing leading product ZYH600C is a hybrid folding machine, which is considered by the industry to be suitable for national conditions products.
China's books and magazines have fourty-fold pages, and in order to meet the needs of manual folding, whether they are double or single, most of them are positive. A double-folding folding machine that can realize positive double folding and single-fold positive folding is not available abroad, but the domestic ZHY660C can be realized.
In order to catch up with the international advanced level, Hunan No.2 People’s Machine Factory has completed the research work on the key technologies of high-speed folding machines and has applied it to the ZHYD490B hybrid folding machine to achieve a machine speed of 180 meters per minute. Reliability and stability are greatly improved, and the noise is controlled below 84DA. During actual use of the prototype, 4 sheets of paper were fed normally at a rate of 240 sticks/minute, and the situation was excellent. The machine has the following features:
The gear meshing plate with universal joints and the folding roller are used, and the cutter shaft is actively connected, so that the gap adjustment of the folding roller (knife shaft) is irrelevant to the gear meshing, the meshing accuracy of the gear is always maintained, and the reliability and stability of the machine are improved. Sex.
The use of steel and non-metallic gear meshing to reduce noise.
The use of digital electromagnetic control folding knife has improved the reliability and stability of the machine and the operating performance of the machine.
Adopting the latest scientific research results of the country, a special high-molecular polyethylene material, the folding roller ring sleeve is used to increase the wear resistance of the folding roller; the manufacturing process of the folding roller is improved, the manufacturing quality of the folding roller is improved, and the reliability of the machine is improved. stability.
Third, the development and trend of the folding machine 1. The development prospect of the folding machine The folding machine as an important equipment of the binding industry is indispensable, especially for such a large population and geographically vast country, The amount of demand will be very large. According to relevant data, at present, the machine folding rate in China is less than 20%. By 2010, the total output will reach 110.493 billion printed sheets, and the book cycle will be greatly shortened, and the quality of books will be greatly improved. With the increase, manual folding can no longer meet the requirements of the times, so the demand for folding machines can be imagined. However, with the rapid development of printing presses, the high-speed rotary offset printing exhibition is very rapid. Because the rotary press itself is equipped with a folding-folding device, the development of the folding-folding machine will play a very important characteristic that the suppression machine cannot be replaced; Many short-lived and high-precision prints still require space for the development of sheet-fed offset presses, and there is room for development of folding machines.
2, the development trend of folding machine (1) folding machine will be intelligent, digital direction.
At present, the advanced folding machines have all adopted a series of advanced forms such as serialization, diversification, mechanical and electrical integration, modular assembly, etc. The structure has achieved satisfactory results and is also intelligent and digital. The first step towards success. With the development of modern industry, the folding machine will eventually love to control the computer. For example, the current STAHL “DCT2000†digital control technology has left connection data interfaces for other systems in the management of discrete printouts and scattered prints, and through the computer interface, there is an open-reading machine control device and factory. The production planning system carries out data exchange between setting data and data. Review the first step in automating the folding process.
(2) Domestic folding machines should work hard in terms of reliability and stability.
The reliability and stability of any kind of product is the most sensitive issue for users, and it must be ensured by the manufacturer.
To improve the stability and reliability of the folding machines, we still have a lot to do, because we have been constrained by many aspects, such as the quality of domestic raw materials, the quality of domestically produced parts, and the quality of domestic electrical components. These are directly Affected the quality of the folding machine. In this regard, each manufacturer has its own solution: either use imported raw materials and equipment, or suppliers to improve quality. The most important thing is to improve professionalism, strive to improve the factory's manufacturing technology and technological level, continue to explore, and focus on the characteristics of the folding machine itself. Scientific research workers should focus on the key technology of folding machines, organize research on key technical problems, and tackle problems, and quickly improve the status of domestic folding machines in the binding industry in China.
As soon as the entry of the 21st Century is approaching, in a huge market outside China, a competition among Chinese and foreign folding machine manufacturers is inevitable. We Hunan Second People’s Machine Factory will face up to the challenges, keep making progress, and work hard. To improve the quality of products, we must have a reputation for excellent products and first-class after-sales services for the printing industry.