On the web offset press and the development trends of new technologies - web, offset - Paper Industry

On the web offset press and the development trends of new technologies - web

, offset - Paper Industry

Along with the development of domestic introduced many of the world of advanced web Print Equipment to the printing industry in China has entered a rapid development stage, the press, Commercial Printing The rapid rise of the printing and packaging printing. To Heidelberg, MAN Roland, KBA, Komori, Mitsubishi, West Research, Drent - Gerber as the representative of the company have launched new technology web offset press, which has a high print speed, producing high efficiency, high degree of automation, printing quality and good features, which are more representative of the new technology mainly in the following areas.

Shaftless technology Shaftless can simplify the printing of the transmission device, eliminating the need for Leather belt Drive gear transmission mechanism in particular, the machine running and operation, installation, maintenance and other units of each color group, simple structure, stable operation, even in the case of high printing quality can be guaranteed. In addition, the operation is very convenient, save time, remove the oil lubrication, reduces machine noise, because removing the driver combinations (such as the drive shaft, clutch shaft, etc.), greatly reduce the manufacturing cost printing technology.

Adopts shaft, it can avoid the traditional mechanical shaft drive, as a printing unit of the mechanical vibration may be transmitted through the shaft to the next printing unit, resulting in the accumulation of mechanical vibration, impact printers transmission accuracy, so that not guarantee good print quality. At the same time very flexible independent motor drive, add or withdraw a printing unit becomes very easy and convenient, the whole system is simple. No shaft drive also allows the machine control to achieve a high degree of automation, so that the combination between the unit becomes more simple and flexible to meet different customer needs. From the development trend, no shaft drive market share increases, no shaft drive will replace the traditional mechanical shaft drive.

Waterless Waterless web in recent years has been vigorously promoted, the market share will expand, KBA, MAN Roland other companies have launched a water web offset press. Characterized mainly in the following aspects: First, complete eradication of the wet bodies, so that ink control more simple, no need to consider balanced ink, printing production process can easily be controlled, while not conducive to using the wetting liquid Environmental protection ; Second, a significant reduction in the printing height, the height of web offset press is a major problem plagued users, with the lifting of water, press height can greatly reduce manufacturing costs and plant height may also worsen The same tower structure, its height can be reduced to less than half the original height; 3 is due to the complete eradication of the wetting liquid, Paper In the printing process does not appear the phenomenon of contact with water, stretch, printing dot the edge of a high degree of clarity, especially in the fine print network cable or a variety of FM when the superiority of the more obvious, but a large amount of ink transfer ink region can achieve very high field density, no signs of ghosting or water roller. In addition, the advantages of waterless offset printing is still drying, and printing on non-absorbent material than the water offset superior printability.

Seamless technology Seamless rubber roller technology's greatest strengths is the rubber roller can achieve complete dynamic balance, which ensure stable operation of the machine is very important. Technical requirements for using this Blanket Itself is cylindrical, which blankets the production process made new demands. However, if the manufacturer does not provide the technology or the availability of consumer Consumables Materials, this technology is difficult in the near future also in large scale.

Ago people thought that the quality of web offset printing with Sheet-fed offset press To vary a lot, with the seamless technology web offset press, roller greatly improved the stability of operation, print quality and sheet-fed offset printing press has been very close, and many former sheet-fed offset printing in the living conditions are now completed in web offset press.

The so-called seamless technology is the seamless use of the rubber roller and seamless plate cylinder, which cylinder with sleeve-type structure. Sleeve type of blanket and plate is easy to use when you can dress up the completion of the operation side of the operation quickly, can significantly shorten the time to replace the blanket and also eliminates the need for fastening operations. Application of seamless technology, the web offset press is the maximum speed of 1.5 times the normal web offset press, about 1000 meters per minute; print format also increase by 1.5 times, most large format wide more than one .7 m; the same time, production efficiency can be increased 2 times.

With seamless blanket can improve the printing quality. Traditional offset press blanket seams meet in the other roller when the mechanical vibration is likely to lead to the generation Mexican bars, which interference would not only reduce the print quality, but also limits the printing speed increased. Increase the mechanical wear. We also have to make trade-offs between quality and speed of printing options. Seamless technology eliminates mechanical interference caused by the printing defect, is completely avoid the plate cylinder and blanket cylinder vibration joints and the best way. In addition, the plate cylinder, rubber roller no space, no need to install shoulder Rail (roll pillow), rubber roller and may do some solid, this would resolve the deformation of the roller, so there will be no double-diameter cylinder necessary, times the diameter drum made of a single.

Seamless blanket can reduce the waste of the printing process. In the drum circle under the premise of equal length, with a seamless blanket of web offset printing presses in the region is significantly larger than the traditional large, so you can save thousands of dollars per year the cost of printing paper.

Sleeve technology

Drent Goebel has introduced a variable size offset sleeve technology, referred to as VSOP technology. This technology enables customers to offset the plate cylinder, a flexible rubber roller sleeve to replace any size without having to replace the entire printing unit printing technology. Application of this technology variable sleeve size, replacement print size convenient, fast, just a few simple steps, you can complete the replacement of various printed materials, even short runs can be done; sleeve and plate The price and supply time, which are far more flexible printing and gravure printing cheaper and faster. Little worse than the traditional offset printing quality of some, but enough and flexible means of gravure printing and match, or even slightly better; while plate cylinder, the circumference of the rubber roller can be no grade changes within a certain range. To press became very flexible almost any different printing materials (such as film, aluminum foil composite material, etc.) printed. Technology has made over the last sleeve of flexible printing technology is rapidly increasing, currently

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