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Technical analysis of investment in commercial rotary printing press

commercial printing is one of the topics that people have talked about more in recent years. Unlike newspapers, books and periodicals and some printing materials that meet special needs, the commercial printing market is mainly aimed at color printing products that have high requirements for printing quality, increasingly use light-weight and diversified paper, and have flexible binding methods, such as a large number of periodicals and magazines, newspaper inserts, luxury newspapers Magazines, newspapers and more and more commercial publicity materials (such as direct mail manuals, shopping guides, supermarket publicity materials), etc

in order to meet the needs of this rapidly growing printing market, printing equipment manufacturers have developed various types and specifications of commercial rotary printing equipment, but the differences in structure, function and price of printing equipment from different manufacturers will inevitably lead to differences in application fields and markets. Therefore, in the face of a wide range of commercial rotary printing equipment produced by different manufacturers, how to choose from the perspective of the highest proportion of lithium manganate battery in the recommended catalogue of new energy passenger cars, on the other hand, from the perspective of function and technology, and make reasonable investment to maximize the efficiency of the investment project is a problem that printers must face. Therefore, we make a technical analysis on the investment of commercial rotary printing machine from the perspective of equipment composition, performance and configuration, for the reference of printers

basic characteristics of commercial rotary press

at present, the most widely used commercial rotary offset press is the commercial rotary offset press. The difference between commercial rotary offset press and sheet fed offset press is that it must meet the requirements of completing large print volume printing in the shortest time, and at the same time, it has the necessary post press processing means such as online folding. Therefore, compared with the sheet fed offset press, the commercial rotary offset press has the outstanding characteristics of fast printing speed and high production efficiency, which is more suitable for the rapid printing of large print volume. On the other hand, the commercial rotary offset press is different from the web offset press in that it has higher requirements for the printing quality of printed matter, which makes the commercial rotary offset press have the characteristics of more accurate tape tension control, more accurate automatic paper receiving and higher precision automatic registration adjustment. At the same time, due to the type of paper and ink used and the characteristics of high-speed and multi-color printing, commercial rotary offset presses generally require drying and cooling systems

it can be seen that in order to better meet the needs of commercial printing, modern commercial rotary offset printing machines have the advantages of fast printing speed (generally the printing speed is not less than 40000 copies/hour), wide application range of paper (the weight range of paper can reach 36g/m2 ~ 130g/m2), good printing quality (up to 300 lines of printing), high production efficiency (the use of various automatic control systems) Good economic benefits (printing, folding, cutting integration) and other outstanding features. In recent years, great changes have also taken place in commercial rotary offset printing machines.

in recent years, the market trend of commercial rotary equipment has changed, including changes in the heating mode, changes in the structure and arrangement of printing rollers, changes in ink and water transmission systems to folding devices, changes in tension control methods, changes in the setting and control methods of auxiliary devices, and the application of more and more automatic setting, detection and operation control systems, Each change has made the commercial rotary offset press have higher printing quality, faster printing speed and efficiency, more convenient use and operation, and obtained a wider application market

commercial rotary offset printing machine is a type of web printing equipment. It uses the principle of lithography to print, so it has the basic characteristics and composition of lithography web printing machine. At the same time, in order to meet the special type of print printing market, commercial rotary offset press has some unique characteristics and functions

basic composition and performance

similar to other types of web offset presses, the basic composition of commercial rotary offset presses includes paper feeding device, printing device and post press folding device. Considering the characteristics of commercial printing, commercial rotary offset presses are generally equipped with drying and cooling systems

the paper feeding device is mainly divided into two parts, namely, the paper roll control system and the paper tape control system. The paper roll control system includes a paper rack that meets the requirements of paper roll installation and adjustment, an automatic paper receiving device that meets the requirements of paper changing without stopping the printer, and a paper roll braking device that meets the requirements of jointly controlling the paper tape tension with the paper tape tension generation device. The paper tape control system includes the guidance system for guiding the paper tape direction, turning and translation, the paper tape tension control system for generating and controlling the paper tape tension, the automatic registration adjustment device that meets the requirements of printing accuracy, and the automatic paper threading system that ensures to reduce the auxiliary time and reduce the labor intensity of workers

the basic composition of the printing device is set up according to the basic principle of lithography, including the printing cylinder part, ink conveying part and water conveying part. The arrangement of printing rollers basically adopts the unit type B-B roller arrangement with horizontal paper feeding. In order to meet the requirements of fast and simple clutch pressure, pneumatic clutch pressure device is usually used. Compared with the web like printing machine, the ink feeding device of the commercial rotary offset press adopts more ink leveling rollers to quickly mix the ink, and has the ability of rapid response when adjusting the ink volume. The direct wetting system is widely used in the water conveyance device to ensure the uniformity of the water film on the printing plate

post press folding device is an essential standard configuration for commercial rotary offset press. The printed paper tape passes through various folding processes such as (longitudinal cutting), longitudinal folding, transverse cutting, transverse folding, (longitudinal folding) and completes the post press folding of commercial printed matter. The use of the disc knife in the slitting device depends on, for example, greater product design freedom, weight reduction, shortening the product development cycle, and greatly improving the effectiveness of sample production, component production, and mass customization. The relationship between the tape width and the size of the final print; The longitudinal folding triangle is an important device to ensure the accuracy and position of the longitudinal folding of paper tape; The cross cutting sawtooth cutter cuts the continuously printed paper tape into a certain size sheet of paper; The folding knife and folding plate on the folding drum complete the horizontal folding requirements of the printed matter. If you need to complete the folding requirements of 16 folio commercial printed matter, you can also use the longitudinal folding device with a folding knife and a folding roller

drying and cooling device is an important part of commercial rotary offset press. Facing the thermosetting ink used in commercial printing, the drying system must be equipped on the high-speed multi-color printing equipment to solve the problem of ink drying on printing. The frequently used hot air drying method is to take away the volatile solvent on the surface of the printed matter at the fastest speed through the high-temperature hot air flow, so that the printed matter of high-speed printing can be dried in the shortest time. The cooling system works in conjunction with the drying system. The heated printed matter is easy to shrink and deform, and the paper becomes brittle, which affects the post press processing. The cooling system can restore the characteristics of the printed matter, and ensure the gloss, dimensional stability and post-processing characteristics of the printed matter

new configurations and functions

with the progress of technology related to printing equipment and the increasing demand of the rapidly developing commercial printing market, new types and brands of commercial rotary offset presses are also emerging, and various commercial rotary offset presses are undergoing eye-catching changes. The use of the new device and the change of control mode have improved the printing function and quality control of the printing equipment. There are two control modes d control conditioning mode 2 Mold Lake Control conditioning mode (the first in the industry) has become the highlight of commercial rotary offset printing machines

(source: keyin)

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