Characteristics and advantages of the most popular

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Features and advantages of multi-functional rotary printing machine

1. Multi functional rotary printing machine

multi functional rotary printing machine refers to a rotary printing machine that integrates various printing methods and various post-processing functions. With the development of market demand and technology, the function of the rotary machine is expanding. The single function rotary machine can not meet the increasingly complex market demand, and the multi-function rotary printing machine came into being

various printing methods include offset printing, flexo printing, gravure printing, line gravure printing, silk screen printing, digital printing, etc. Post press processing functions include bronzing, laminating, die cutting, embossing, folding, cutting and drying. The multi-functional rotary printing machine can integrate the above functions into a printing production line at the same time, forming a multi-functional production capacity, so that the product can be completed at one time, which can improve the production efficiency, reduce waste, and achieve the best printing effect at the same time

in the past, people could use sheet fed printers to complete the process of multi-function printing. However, such a process also has its fatal weakness. For example, the paper will be deformed after repeated printing, resulting in inaccurate overprint and increased scrap rate. In addition, if a sheet fed printing machine is used for a printed piece, and it is completed after many times of printing and post-processing, the enterprise needs a huge space for semi-finished products stacking, and the production efficiency is undoubtedly very low. The application of rotary machine effectively avoids these weaknesses

the emergence of multi-function rotary printing machine is the product of the changing printing market and the increasing requirements for printing products. The characteristic of this kind of printing machine is that it can fully reflect the current market requirements for multi-function and high efficiency. At the same time, the emergence of multi-functional printing press is also the product of the development of various advanced technologies to today. Without the advent of new technologies, it is difficult for multifunctional printing machines to enter the market before the gate freezes

2. Printing characteristics

another prominent feature of the multi-functional rotary printing machine is its printing ability to print a variety of substrates. It has a wide range of substrates, including plain paper, cardboard, plastic film (PVC, OPP, etc.), aluminized film, self-adhesive and composite materials. The thickness of the substrate can be between microns

its specific products include: commercial rotary printing, plastic flexible packaging, aluminum film packaging, paper packaging, cardboard packaging, self-adhesive labels, laminated labels, seamless cylinder labels, as well as high value-added safety printing, lottery printing, commercial paper printing, art printing, etc

different printing methods have their advantages and disadvantages. The multi-function printing machine can give full play to the advantages of various printing methods according to the characteristics of the printed matter, learn from each other, and achieve the best printing effect

for example, offset printing is characterized by its advantages in accurate halftone printing, uniform gradient and high definition. Flexographic printing is good at field printing, metal ink printing, local glazing and other processes. Gravure printing is good at printing metal ink, safe printing and field printing, and has a thick ink layer thickness. Line gravure strip printing and safety printing are unique. Silk screen printing is good at ink layer thickness, metal ink and special printing effect. Digital printing is its specialty in printing changing content. Combined with post printing processes such as bronzing and laminating die cutting, it can not only achieve the most satisfactory printing effect, but also greatly improve the production efficiency

3. Technical features

multifunctional printing machine has the following characteristics in design:

modular design

modular design is to make any printing unit or post press processing unit into a single module, which can be installed in the necessary position as required, which makes it possible to add any printing unit and post press processing unit. This increase can also be placed in the desired position of the customer according to needs. The vision printer of Drent Goebel company, for example, can install up to 40 groups of printing and post-processing modules, which can complete the post-processing functions such as offset printing, flexo printing, silk screen printing and bronzing. At the same time, the replacement of these plug-ins can be completed quickly without any tools

shaftless technology

in the past, multi unit printing machines used a main drive shaft. When there are not many printing units, there will be no problems. However, when the printing unit is increased and the distance of the drive shaft is lengthened, torque instability and gear lag will occur. The simple structure and advanced technology make it difficult to maintain the synchronous operation of each unit. If the longer the transmission shaft and the more gears, the greater the error will be. As a result, the printing registration is difficult to ensure. In the afternoon, the price of some steel mills in Tangshan increased by 30 yuan/ton, and the printing quality cannot be controlled

using shaftless technology, a motor is installed on each printing unit, which is controlled by computer to make each printing unit operate synchronously and accurately. The connection between the units is not mechanical, but driven by the central control computer. The precise control mode of shaftless technology can also greatly reduce the preparation time before printing and consumption. The use of shaftless technology can easily increase many printing units and post-processing units, and also ensure the accuracy of printed matter. Due to the use of shaftless technology, the transmission mechanism of the printing machine drum is no longer limited by gears, which makes it possible for the printing machine to install and replace rollers of different sizes. At the same time, due to the simplification of mechanical structure, the spare parts reserve of enterprises can also be reduced and the benefit can be improved

because the shaftless technology is more accurate than the shaft design, the preparation time before printing is also greatly shortened and improved. The loss rate in China is as high as 20% - 30%, which improves the efficiency, reduces waste, and the advantage of the rotary machine is more obvious. This kind of rotary machine can even undertake the printing business of printing as short as 3000 copies

plug-in technology

in the past, a weakness of the rotary machine was limited by the size of the printing format. The newspaper printing machine will not have this problem. Because the size of the newspaper remains the same, it will not be troubled by the size. However, when you need to print prints of different sizes, because the cylinder diameter of the printing machine cannot be changed, the rotary printing machine is bound to waste paper. In order to solve this problem, the simplest way is to change the size of the drum, which is the problem to be solved by plug-in technology. The plug-in technology is to make the rollers with different diameters into different plug-ins, and the roller plug-ins with different diameters can be replaced according to needs, which solves the problem that the rotary machine can print prints of different sizes. The printing machines of Drent Goebel company adopt the package plug-in design of 3 rollers. In each package plug-in, the size of the plate cylinder, blanket cylinder and embossing cylinder are the same, which ensures the quality of web printing. Users can choose different sizes of rollers. The sizes of different rollers can be increased or decreased by 4.23mm (1/6 inch) or 6.35mm (1/4 inch). Due to the change of drum diameter, the maximum length of printed matter can be selected between 431.8mm and 711.2mm

when replacing the plug-in, except pressing the button, there is no need for any tools and other human intervention. The inserted roller group can be automatically locked and rotated to the starting position, and the four roller inserts can be replaced within 10 minutes. In addition, the printing plate can also be installed before the cylinder plug-in is replaced. As long as the cylinder insert is replaced, printing can be started immediately, which greatly saves the preparation time before printing

sleeve technology

sleeve technology used to be used by flexo printing technology in the past, and now it is also used in offset printing rotary machine. This technology is also to meet the requirements of enabling the rotary printing machine to print pieces of different sizes. The function of sleeve technology is consistent with that of plug-in technology, but the cost of sleeve technology is lower than that of plug-in technology. Because you don't need to replace the plate cylinder, blanket cylinder and impression cylinder at the same time, the adjustment time between replacing different prints is shorter, and you only need to replace the sleeve. Moreover, when changing the size of the sleeve, only the plate cylinder and blanket cylinder need to be replaced. The sleeve diameter of Drent Goebel can be changed steplessly from 381mm to 762mm

different from the plug-in technology, the printing plate cylinder, blanket cylinder and impression cylinder using sleeve technology are installed with their own motors, which also makes the registration work more accurate. The plug-in technology has only one motor to drive the plug-in

drying technology

various drying technologies can be used on multi-function rotary printing machines. Such as UV drying, hot air drying, infrared drying, electron beam drying and high-frequency drying. According to different needs, the dryer can be equipped with a cooling roller or a separate drum cooling device

uv drying is the most suitable drying method often used, and it is most suitable for materials with high printing requirements and temperature sensitivity. There are many ways to control the sensitivity of temperature, the flying ink of ink, the position of UV lamp, etc

the advantages of using UV drying are: it can reduce energy consumption, reduce the amount of ink used, and reduce the temperature and pressure on the printing materials. It is an environmentally friendly printing method. The preparation time before printing is short, and the ink can be dried quickly. Because 100% solid materials are used, there is no solvent, and there is no pollution caused by solvent-free evaporation. The performance of the ink in the ink bucket is very stable, It is suitable for most printing materials, with good glazing effect, solvent and heat resistance, wear resistance, and ink durability. (end)

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