Except for a few countries such as Japan, Switzerland, the United States and China that manufacture folding machines, the main manufacturers of folding machines are concentrated in Germany. The folding machines produced by STAHL and MBO of Germany occupy an absolute dominant position in terms of variety and output, and are also the best products in the world in terms of product level and manufacturing technology. The folding machines produced by both companies are well-known in the world of post-press binding industry for their exquisite shape and reliability.
1. Structural characteristics of STAHL and MBO folding machines
1. Building block module design
The use of building block module design is a common feature of the folding machines of these two companies. Unit composition. Each independent unit has a variety of structural forms to meet the different needs of users. For example, the paper transport machine has a stacking type, a stacking paper frame type outside the machine, a round bale type, etc., and any type of paper transport machine can be matched with the first folding group of the same specification. The first fold group is specific. From the second fold group, its structure can be combined with a folding knife and first fold to form a K series hybrid folding machine; it can also be a fence type and the first fold group Combined to form a T series fence type folding machine, and the second folding group can adopt the fence type and the third folding group can adopt the folding knife type to constitute another form of hybrid folding machine. Like the paper machine, the paper machine also has a variety of forms and models for users to choose from. It fully shows that the modular module design is flexible and versatile, and has many advantages such as quick combination according to user order requirements.
2. Adopt special structure and technological means to ensure the reliability and stability of the machine
In terms of special structure and special craftsmanship, the two companies have their own coups, and their effects can be described as parallel.
(1) The paper sub-systems manufactured by the two companies are quite reliable, but the structural principles are quite different. STAHL company adopts fully pneumatic automatic paper separation and paper feed stack, which is characterized by relatively high requirements for the manufacturing accuracy of pneumatic components. In the case of high paper feeding frequency, the stability of both is very good.
(2) The folding roller and vertical axis of STAHL company adopt helical gear transmission, which improves the gear meshing coefficient, and at the same time guarantees the linear speed of the folding roller; MBO adopts flat belt transmission, which reduces the transmission process. noise. The shortcomings of both can be overcome to the greatest extent by improving the manufacturing accuracy. High-precision gears can greatly reduce the noise list, and high-precision flat pulleys and easy and flexible folding rollers are supported by the flat belt with excellent texture. It can also reduce the stall between folding rollers to be negligible for folding machines. This has been fully confirmed on the folding machines produced by STAHL and MBO.
(3) Both companies use steel fine-tooth polyurethane folding rollers, but STAHL uses ring-type polyurethane sleeves with steel sleeves apart, while MBO uses steel fine-tooth spiral polyurethane belts. Just as the advantages of the respective folding rollers that the two companies each promote, they have played a good role in improving the folding accuracy, reducing paper slip, and reducing the movement noise of the folding roller.
(4) In addition, such as polyurethane paper suction wheel, static elimination paper table, high-precision transmission bearing, transmission gear plate with universal coupling, exquisite grid plate and light and flexible folding knife, etc., folding high precision The pages provide a stable and reliable guarantee.
(5) The digital control system has been applied to the folding machine.
(6) Both STAHL and MBO have adopted numerical control technology in their products. STAHL's numerical control system is named DCT2000. It uses inverter and sensor technology for transmission control, paper suction cycle control, paper monitoring control, count control and fault diagnosis display, etc. It is an intelligent control software and advanced driver The combination of systems. The CNC system of MBO is named MPC system ", which sets up paper measurement, paper monitoring control, etc.
Convenient and reliable electronic technology greatly improves the production efficiency of the machine, reduces labor intensity, and also provides more additional functions.
2. The current situation and level of domestic folding machines
Domestic manufacturers of folding machines currently include Hunan Second People's Machinery Factory, Shanghai Ziguang, Zihong, Second Printing Machine Factory, Lishun and other enterprises. These factories all produce ZYH series hybrid folding machines. In addition, Tangshan Yuyin, Changchun and Yibin printers also produce other series of folding machines, but the output is relatively small. At present, compared with internationally renowned products, domestic folding machines still have a large gap in shape, variety and performance. Hunan Second People's Machinery Factory, as a professional manufacturer of folding machines, currently has a leading product ZYH600C folio hybrid folding machine, which is considered by the industry as a product suitable for national conditions. [next]
There are many four-folded posts in books and periodicals in China. To meet the needs of manual folding, whether it is double or single, most of them are positive folding. The folio hybrid folding machine which can realize both double-fold positive folding and single-fold positive folding is not available in foreign countries, but the domestic ZHY660C can be realized.
In order to catch up with the international advanced level, Hunan Second People's Machine Factory has completed the research work on the key technology of high-speed folding machine through half a year of efforts, and applied it to the ZHYD490B hybrid folding machine to make the machine speed reach 180 meters per minute Reliability and stability have been greatly improved, and the noise is controlled below 84DA. In the actual use of the prototype, the 4-sheet paper normally feeds at 240 stickers / minute, and the situation is excellent. The aircraft has the following characteristics:
The gear engagement plate with a universal coupling is flexibly connected to the folding roller and the knife shaft, so that the gap adjustment of the folding roller (blade shaft) has nothing to do with the gear mesh, and the normal meshing accuracy of the gear is always maintained, which improves the reliability and stability of the machine. Sex.
Steel and non-metal gears are used to mesh with each other to reduce noise.
The use of digital electromagnetic control folding knife improves the reliability and stability of the machine and the operation performance of the machine.
Adopt the latest national scientific research achievements-a special polymer polyethylene material to make the folding roller ring sleeve to increase the wear resistance of the folding roller; improve the folding roller manufacturing process and improve the manufacturing quality of the folding roller, thereby improving the reliability and the machine stability.
3. Development and trend of folding machine
1. Development prospect of folding machine
As an important equipment in the bookbinding industry, the folding machine is indispensable, especially for a country with a large population and a large area, such as Yunmen, the demand will be very large. According to relevant data, the current machine in China The folding rate is less than 20%. By 2010, the total printing volume will reach 110.493 billion printed sheets, the book publishing cycle will be greatly shortened, and the book publishing quality will be greatly improved. Manual folding can no longer meet the requirements of the times. The demand can also 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 has a folding device, the development of folding machines will play a very huge feature that the suppression machine cannot be replaced; Many short-run jobs and high-precision prints still need space for the development of sheet-fed offset presses, and there is room for the development of folding machines.
2. The development trend of folding machine
(1) The folding machine will develop towards intelligence and digitization.
At present, advanced folding machines have adopted a series of advanced forms such as serialization, diversification, mechanical-optical-electrical integration, and module combination. The structure has achieved satisfactory results. It 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 a data interface for other systems in the management of scattered prints and the statistics of scattered prints, and through the computer interface, it can be used to open the Jiajia control device and the factory. The production planning system carries out the exchange of relevant setting data. The first step in automating the folding process.
(2) Domestic folding machine should work hard on reliability and stability.
For any product, its reliability and stability are the most sensitive issues for users, and it must be guaranteed by manufacturers.
To improve the stability and reliability of the folding machine, we still have a lot of things to do, because we are restricted by many aspects, such as the quality problems of domestic raw materials, the quality problems of domestic accessory parts, and the quality problems of domestic electrical components. These are directly Affects the quality of the folding machine. In this regard, each manufacturer has its own solution: either use imported raw materials and equipment, or cooperate with suppliers to improve quality. The most important thing is to improve professionalism, strive to improve the factory's manufacturing technology and process level, continue to explore, and concentrate on the characteristics of the folding machine itself. The scientific research workers should organize research on key technologies and technical problems of the folding machine, and solve the key problems to quickly improve the position of the domestic folding machine in China's post-press binding industry.
Entry is imminent, the 21st century is coming, in a huge market outside China, a competition between Chinese and foreign folding machine manufacturers is inevitable. Our Hunan Second People's Machine Factory will face up to the challenges, keep making progress, and work hard To improve product quality, we must be well-known in the post-press bookbinding industry with excellent performance products and first-class after-sales service.
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