On the sleeve technology of rotary offset printing

2022-08-03
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On the sleeve technology of rotary offset printing

rotary offset printing machine is increasingly favored by people because of its high production efficiency, but it is limited to the field of publishing and printing because of its own weaknesses. For packaging and printing, due to the size of the packaging box is not fixed, it is difficult for the rotary offset press to exert its advantages of high production efficiency in the field of packaging and printing

in order to solve this problem, many printing machine manufacturers have adopted plug-in technology. The so-called plug-in technology is to make the plate cylinder, blanket cylinder and impression cylinder on the printing machine into an independent part, which can be disassembled as required. In this way, several plug-ins with different cylinder sizes can be made according to the needs of the print size. However, this technology is still unsatisfactory. First of all, the cost of making plug-ins is relatively high. If the print size is too large, the cost of plug-ins will be higher. Secondly, the plug-in is heavy, and the replacement is laborious and time-consuming. Although it has been improved repeatedly, it is still very cumbersome. In addition, since the rotation of the drum needs to be driven by gears, the system and the base wall should be reliably fixed, and the drum diameter cannot be arbitrarily designed

the emergence of sleeve technology makes printing of different sizes more flexible. However, when replacing the sleeve, the transmission gear must also be replaced, and the size change cannot be stepless

the emergence and application of shaftless drive technology have greatly changed this situation. After the shaftless drive technology is adopted in the rotary offset press, all the shafts are driven by the servo motor. In other words, the plate cylinder, blanket cylinder and impression cylinder of the printing machine are driven by independent servo motors respectively. Due to the elimination of the transmission shaft and transmission gear, the shaftless drive offset press can realize the stepless change of the plate size and print the substrate materials with different thickness

it can be said that the perfect combination of sleeve technology and shaftless drive technology has changed the situation that the length of the rotary offset press is limited in the repeated printing, and the standard response in the offset printing market is not very perfect, setting off a new revolution. Comparison of delant Geber curve: the curves of the same group of samples can be superimposed for comparison; Our company is the first manufacturer to apply the shaftless servo motor technology to the rotary offset press. The concept of VSOP (offset printing technology with variable sleeve size) proposed by our company enables the printing plate and blanket to be installed on the sleeve customized according to the length of the printed piece. It has the characteristics of light weight, easy operation, fast replacement, high flexibility, wide range of substrate, etc

at present, in the packaging and label market, the competition of various printing technologies is very fierce. In short version printing, rotary offset printing has an advantage over gravure printing and flexo printing. First of all, offset plate making can be readily available, and has excellent performance in addition, gradient, minimum point size, small lines and text. Secondly, for different types of substrate materials, such as cardboard, label and film, if gravure or flexo printing is used for printing, the requirements for plate making are different. However, if offset printing is used, the reproduction curve and printing quality are the same for different printing materials. In addition, when printing on different substrate materials, offset printing also has great advantages in color consistency. Therefore, under the circumstances of less and less printing volume and lower and lower prices, rotary offset printing will have more markets and opportunities. Moreover, with the successful development of new materials such as direct plate making and seamless blanket, rotary offset printing will usher in a broader development space in which China's yuan coal production will be reduced by 10% year-on-year

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