Folding machine

Introduction Folding machine is a modern printing device that accompanies the modern printing industry. Modern printing factory usually includes three processing processes: prepress, printing, and postpress. The main carrier medium is paper. Due to the rise of packaging and printing, it is used in other materials and media. , such as plastics, fabrics, leathers, metal surfaces, etc. are also emerging, but the main carrier is still dominated by paper. Printing industry processing is usually divided into books and newspapers processing and packaging processing. Folding machines are one of the main post-press equipments for books and newspapers processing.

Background In the mid-50s of the 20th century, in the campaign of technological innovation, some printing factories created folding machines, which created a precedent for the manufacture of folding machines in China. In February 1968, the State Development Planning Commission and the First Ministry of Machinery Industry and other units jointly held the "Mao Chairman's book" printing machinery planning meeting," the meeting decided to expand Hunan Xinshao Printing Machinery Factory (the predecessor of Hunan Xinshao Printing Machinery Co., Ltd.) , designated professional production folding machine.

Until the mid-1980s, ZYl01, ZYl02 fullsheet and ZY201 open-end folding machines have been the leading products of folding machines. In order to solve the inconsistency in printing and unbalanced printing, the State’s “7th Five-Year Plan” decided to introduce a foreign advanced folding machine prototype and technology from Hunan Xinshao Printing Machinery Factory and independently develop a high-speed folding machine. In the middle and late 1980s, the factory successively developed the ZYH660 hybrid high-speed folding machine and the ZYH490 electronic control knife high-speed folding machine. After the 1990s, it was the golden age for the development of our folding machines. Shanghai North Manshun Printing Machinery Co., Ltd. and several other manufacturers have also joined the research and manufacturing of folding machines.

The domestic high-speed folding machine mainly consists of paper separation system, paper feeding system, bending parallel folding system, vertical folding knife folding system, rack, transmission system, electric control system and receiving system. Although our ancestors had invented printing technology long ago, the printing technology level in China today appears to be lagging behind. At present, domestically-made advanced folding machines have only reached the international advanced level in the 1990s.

At present, there are many varieties, small batches, and short delivery times for printing companies. This kind of trend will make the preparation time for starting up and the frequent setting time of the machine become higher and higher in proportion to the total production time, but the actual production time is relatively reduced. In the fierce market competition, this means that the post-press processing enterprises More products must be produced in a shorter period of time in order to obtain more profits. Therefore, the optimization of the production process and the integration of operating procedures produced more reliable production of each product, and put forward newer and higher requirements for post-press equipment manufacturers.

Development trend 1 The new generation of folding machines pays more attention to details. The details determine the success or failure. The folding machine also pays more attention to detail in the structure. The new folding machine strives to do a better job in detail. For example, the StahlTH/KH series in Heidelberg is innovative in shortening the replacement time. It utilizes the AirStreamTable, which has both vacuum guide and alignment functions. It can store operating parameters that need to be produced. The folding roller of the motor drive can be precisely adjusted. And automatically set in advance, significantly reducing boot time. It is precisely because of the transformation of details that these folding machines are widely welcomed by the printing manufacturers. Similar to MBO's Rapidest job preparation system.

2 functions have been further expanded without doubt. More powerful folding machines are more likely to be favored by customers. It is easier to obtain greater market share. The function of the folding machine now far exceeds the simple functions of the 16- or 32-sheet folding machines we are familiar with. The Stahl folding machine of Heidelberg also offers many special configurations for the user to choose from, such as closing the door, injecting glue online, Tear-type cutting, window drilling, and even can increase the online paste cards, inkjet printing and other functions. Beijing Hualian Printing Co., Ltd. printed the 2005 calendar (rooster calendar), which fully displayed the charm of the international brand STAHL folding machine in post-press processing. The paper-folded chicken was affixed to the Taiwanese embossed plate to add color to the desk calendar. A lot.

3 to the direction of high-speed, high-stability At present, the highest production speed of folding machine has been increased to 40000 posts / hour, such as Heidelberg StahlTA52 folding machine. Because of its high degree of automation and simple and flexible operability. Making the folding machine work preparation time is greatly shortened. The stability of the folding machine mainly examines its adaptability to various paper operations. Because the customer's demand for paper used in prints is increasingly diversified. More and more demanding. It is often the case that several different types and quantities of paper are used in a batch of jobs, and even customers will provide their own paper. This requires that the folder equipment has great strain and adaptability.

With the rapid development of social civilization, the demand for print has become increasingly diversified and differentiated. The diversity and individuation of printed materials has led to a growing number of “special-format” books, which has increased the difficulty of folding. Many folding equipment manufacturers have improved the adaptability of folding equipment and are also folding. The design of the modular structure was increased during the design of the page to enhance the flexibility of the device and meet various user requirements. On the other hand, fully-fledged folding machines, which are produced to match the full-web format presses, have emerged. Remove the paper cutting process and improve work efficiency. The MBOT130/142 full-gate full-opening folding machine and oversized folding machine are excellent examples.

5 Low-noise desktop folding machines will continue to confuse printing companies with development noise pollution. Major printing companies are trying to eliminate noise and reduce its damage to workers. Optimize the working environment of workers. Low-noise folding machines have been approved by printing companies in post-press processing. For example, MBO's J and K series folding machines are equipped with noise-reducing casings, and desktop folding machines do more to eliminate noise.

6 gradually integrate into the integration process. More intelligent integration is the development trend of the printing industry, and it is also the most ideal state. The folding machine is an indispensable part of the post-press processing process. Must also adapt to this integration trend. Equipment automation and digitization complement each other. The automation trend of the current folding machines is mainly focused on improving the degree of automation of the control system, and the digitized development trend is more integrated with the entire printing digital workflow. Focus on the application of technologies such as JDF and CIP4. In recent printing professional exhibitions, many networked post-printing solutions have emerged. Some new folding machines already have information exchange capabilities. With the support of data management software, they have become part of the end-to-end JDF digital workflow. . Data transmission is implemented together with other JDF-compatible systems in the network.

Classification folding machine itself is divided into office folding machine, professional folding machine, and business folding machine, folding machine can also be called origami machine, widely used in banks, letters office, survey companies and delivery letters More company units, etc., while professional and commercial high-speed automatic folding machines mainly refer to the latter two, installed in modern printing plants, as the main component of the post-press workshop. Modern folding machines were born in Europe. The main manufacturers are concentrated in Germany. The main manufacturers are MBO, STAHL, MB, H&H, GUK, etc. The United States and China also have factories.

The speed of professional and business high-speed folding machines is generally more than 15,000 sheets of standard paper per minute. The line speed is 180 to 220 meters per minute. The number of foldings varies from 4 to 16 percent depending on the structure of the machine. The most commonly used ones are It is folding machine of 8 to 12 folds. If a book is 32 pages, then the printed matter from the full sheet printer will have to go through 5 different folds in order to reach this size, and more than 8 fold fold products are generally from advertising, brochures. , Maps and other special folding products, the drug product manual can be folded to the smallest 20 mm size, up to 18 to 20 times the folding process, the need to import advanced folding machine to complete, and can process super thick paper and ultra-thin paper.

The composition of the folding machine is much the same, mainly composed of three parts: paper feeding, folding and receiving.

1 The paper feeding section is divided into a sheet feeding device and a continuous feeding device. The paper feeding device is mainly responsible for separating and conveying the paper, and can accurately convey the printed page to the folding portion.

Paper separation is the biggest factor influencing production efficiency. At present, the automatic paper separation system of Zihong's paper table paper feeder can achieve an amazing capacity of 40,000 times per hour in an independent cycle. The system principle is that when the first sheet of paper is sucked by the suction wheel suction hole, the second sheet of paper is sucked up and blown open by the tuyere. Compared with other systems that are not independent of the suction cycle, this method provides longer air supply times and the height recognition takes place outside the pre-blower air cushion area. Air cushions are particularly important for pre-separation of paper. With its innovative technology, the paper suction wheel surface application of polyurethane coating technology, even if the high-speed running thick and smooth long-length open paper can also be accurately entered the bridge, 3-row polyurethane suction wheel for difficult to convey paper Does not produce any traces. The advantage of the rotary paper feeding device is that it not only can feed the regular thin paper without interruption, but also has unparalleled advantages for large-volume long-length prints. It can even handle pre-folding and pre-fighting with little effort. And pre-punched prints. Book stickers can be stacked by hand in a single row. Then through the reversal roller to reach the next conveying station, where the paper is separated by the suction wheel, the greatest advantage is that the production efficiency is high, and the non-stop continuation of the paper will not interfere with the production. Most of the bridges use the form of a spring clamp guide bar. This structure eliminates the static electricity of the signature.

2 folding mechanism The folding mechanism of the fence is a mechanism that completes the folding using the fence and the relative operation of the folding roller and the steering fence, and is mainly composed of a folding roller and a folding fence.

For a folding machine, the fence box is undoubtedly very important. The traditional fence frame not only needs two people to operate when the paper steering wheel is adjusted, but also has the disadvantages of large side-to-side errors and the like, and also has scratches of different degrees for more sensitive paper. The signatures that require special folding methods cannot be achieved either. The appearance of movable fence frames and Guanyin folding fence frames. Solved these problems. The mobile fence frame combines the baffle and deflection features into one, allowing the operator to turn the knob for just a few seconds, turning them from a paper baffle to a paper deflector with hard-coated hooks on the surface. In the lowest position, it is used as a steering device and also serves as a stop plate in any other position, which greatly accelerates the preparation speed for starting. And the advantages of the mobile fence box are: The fence board is always in the folding unit. The operator will not be harmed because of the operation, and the operator does not have to supervise the folding unit. China's fully-owned Guanyin folding fence with independent intellectual property rights, its electronic control mechanism for accurate Guanyin folding, with full-page press, suitable for any size, the paper will not wrinkle and so on. By adding a wear-resistant coating to the surface, the hardness is as high as HV 3 50 or more. Stainless steel is used for the fence, and a digital display is installed on the cardboard to greatly improve the accuracy of the paper folding.

3 Delivery section The delivery section can be in the form of a portable delivery trolley. The delivery trolley can adjust the height and angle according to the origami style. And has an independent stepless speed adjustment function, can be adjusted according to the folding speed.

The delivery section is still a device that many post-press processing companies ignore. Folding machines are basically manual departments in post-press processing companies, and their labor intensity is still high. Most of the paper collection is using a continuous delivery device, which makes people tired of dealing with it. At present, there are basically only continuous delivery devices and flattening delivery devices in domestic delivery devices, and no one company has produced bundle delivery devices. The future bundle delivery equipment can realize multiple stacking and ultrasonic welding envelopes, and only need one operator to operate the folding and stacking machines at the same time. According to different needs, there will be double-layer stacking machines, vertical stackers, high-speed bundle delivery machines, and horizontal stackers.

The latest type of high-speed folding machine The latest high-speed folding machine has already achieved the user-friendly operation interface. The adjustment of all folding operations can be done digitally and automatically. A more advanced folding machine can also be operated on the network. The global unified instruction interface performs the entire automatic control operation of the printing factory, and can achieve remote control and centralized control. The high-speed automatic folding machine is divided into folding knife, folding fence, folding roller, paper feeding table and delivery table, and the main part of the control part. Due to the need of high-speed uninterrupted operation of modern printing, the resistance to raw materials used is high. Grinding, hardness, surface treatment and machining accuracy all have very high demands. At present, the high-end products of high-speed automatic folding machines in China are still mainly dependent on imports, but with the improvement of the level of China's processing industry and the continuous entry of foreign-funded factories into China, the level of Chinese domestic companies is also rapidly increasing.

Office origami machine Office origami machine usually has a folding tray, which can realize four folding methods. The function of some people origami machine has two folding trays can realize 6 kinds of folding methods. The office folding machine has the features of easy operation and high degree of automation. It is mainly used for large-volume folding of postal letters, product brochures, official documents and business letters.