Development analysis of the hottest web printing m

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Analysis on the development of web printing press

nowadays, most food packaging uses soft packaging materials, and these materials are generally very close to or even in direct contact with food, which may have an impact on the quality of food. Therefore, food packaging manufacturers are required to guarantee the quality of food

materials and commodities with the following characteristics cannot be used for food packaging:

1 Endanger human health

2. Lead to adverse changes in the internal components of food or sensory characteristics such as color, aroma and taste

as we all know, odor and food packaging is a very complex field. This paper will focus on: odor discrimination and threshold; Reasons for the smell of packaging materials; Optimization and measurement methods of residual solvents and estimation of residual solvents

web printing machine is developing towards integration, automation and high efficiency.

the current web printing machine is larger, but it may not be faster. These printing machines look more like an industrial machine. 4. Main technical indicators: a printer rather than a tool for technicians. However, the automation program of web printing machine is higher, and the equipment itself is more complex It is certain that the web press will gradually integrate with the computer system and become a part of the computer integrated system. Thermosetting web printing machine is more efficient, but the price is also more expensive

however, when American printing enterprises invest in equipment, they attach great importance to web printers and 40 inch wide, 10 color, coated sheet fed printers

before the 1990s, web offset printing machines were in a very backward state, but now printing manufacturers began to be interested in split thermosetting web printing machines. This size of web printing machine mainly produces four open or folio printing products. Combining this equipment with the sheet fed printing machine can create a very dynamic production environment in the printing plant of the sheet fed printing machine

do not ignore the narrow web or small web printing machine in the web printing machine. The size of this small type of printing machine is generally, and the web width is less than 26 inches. In the most common case, the width of this kind of web press ranges from 18 inches to 20.5 inches. Some printing machines in this size range are used in direct mail and small and medium-sized commercial printing. This kind of printing machine is thermosetting and has good performance. The other is a cold set printing machine with up to 10 units of rubber roller and iron roller pairs

for printers who want to use web printing machines, there is a wide range of options for such printing machines. Moreover, they can also choose improvement options and corresponding accessories to improve production efficiency. In addition to the consideration of size, other features and control methods of the web press should also be considered when purchasing

because the thermosetting rotary machine has changed from an independent equipment to a key component of the production system. Driven by manufacturers, this phenomenon has been widely recognized

the first business model of printing machine is that manufacturers should design, produce and integrate as many components and parts of the printing system as possible

manufacturers no longer only regard the printing machine itself as some of their key products, without considering the material processing equipment and printing machine auxiliary equipment related to this printing machine. Now, they regard the printing press as an integrated printing system from paper input to output

for example, if you want to combine various components of various electrical protection of power link, is there a better way than the main manufacturer to process them before sale? Of course. Take an example: the component design and production of a printing press must be carried out in the production process. However, some of them can be determined according to the requirements of users or the manufacturers of auxiliary accessories of the alliance. The purpose of the final printing machine is to obtain flexible and high production efficiency, and integrate the whole printing system mode from production to final product delivery

for a supplier, this business model is to control the use process of prepress, plate making, printing, binding and related sending hardware and software through a strict control software

this method is based on the "digital network production system" authorized by the research Engineering Council. Heidelberg's acquisition, cooperation and measures to combine publishing and binding with the operation of web printing machine show that they are working in this direction

for printer manufacturers, the second business model is to play the role of system integration. In this scheme, the printer gives the option of printing machine accessories and other parts of all production systems to the printer

in the system integration part, the communication between machines can be realized by using the CIP3 protocol developed by international cooperation organizations for prepress, printing and post press integration

advocates of this plan claim that it will give printers a wider range of equipment options, and also stimulate competition in technology and price. Printers need and want to be selective about equipment

it is very clear that in the market of web printing press, the printing press itself will continue to become a more integrated production equipment under digital control. At least in a short time, these two business models will develop side by side. However, from the previous period, economic development may lead to further consolidation of printing machine accessories and component manufacturers. Perhaps this change involves all companies producing printing production equipment and software

whether it is the basic web offset printing platform or the components integrated in a computer integrated production system, this great production link in the printing industry is undergoing great changes. For many years, Heidelberg has been committed to the production of full open web printing machines. By 1993, Heidelberg web printing system changed the web printing mode through the introduction of six color, double-sided M3000 shaftless, seamless rubber roller printing machine, because polymers are composed of long-chain molecules

with the wide drum printing machine running at the speed of 3000fpm, this printing machine technology known as Sunday is confident that it can become a new equipment trend of thermosetting rotary printing machine

however, with the recognition of gapless technology, it has been widely used in manufacturers. However, because Heidelberg web press system company believes that this technology is their proprietary technology and has filed a legal lawsuit against its use, this technology trend is completely prohibited. Heidelberg claims that 100 patents have been applied for in the development of this Sunday technology

the results of two lawsuits in March 1998 prohibited other printing machine manufacturers from using the concept of seamless blanket. However, except the United States, such disputes in other regions have not ended. So, man MAN Roland continues to use the concept of no gap in Europe

the success of Sunday printing machine technology can be illustrated by the two recently released printing machine forms. Sunday2000 is a 16/24 page (full sheet/larger than full sheet) commercial printing machine intended for commercial printing. Sunday4000 is a 48 page printing machine for medium and short edition magazines and high-quality commercial printing market. The maximum speed of these two latest gapless printing machines is 2500fpm

gapless technology is an important development of the thermosetting web press market. In fact, there are several other development trends that are also very important

the development of color printing is mainly to connect the prepress operation with the printing process through CTP technology, and the control of color can be realized through a closed color control loop by presetting the amount of ink on the printing plate

for CTP, the reason for the reduction of basic cost is to reduce the pre press preparation time of the printing machine. The way of directly outputting information to the printing plate reduces the problems of image combination and registration, which are always encountered in the traditional production process. Therefore, the problems of plate exposure and processing are reduced. Therefore, in the end, it is faster for the printer to obtain the desired color effect and achieve the registration effect. This significantly reduces the pre press preparation time and related problems, such as paper waste

if the automatic preset ink volume is added to the printer, the pre press preparation time and waste will be reduced again. However, there are not many web printers equipped with automatic ink presets. This technology has great potential, but it may take some time to fully implement it

closed automatic color control circuit has long appeared on web printing machines. Now, closed loop automatic color control systems can be obtained from WPC, quadtech, graphics micro systems and other companies. There are about 50 closed loop systems in operation in the United States. Therefore, for this system, it will become the main standard option of the main printing press

every printing machine manufacturer will assemble corresponding printing machines according to the needs of customers, but for them, to combine the printing machine with color control, they must jointly develop a connection software with color suppliers

quad/graphics has installed seven such systems, and there are successive installation plans. The registration system has now become a standard part of every new web printing machine. Therefore, the closed loop automatic color control system will also become a standard part in the future

installing a closed loop automatic color control system for the web press will make the equipment more efficient. Mitsubishi also attaches great importance to the improvement of printing machine unit design. They do not only take it as a part of the integrated printing machine production system, but develop them into integrated components of key systems

although the closed automatic color control circuit is good in theory, not all printing manufacturers think the price is very reasonable. Closed color loop system, like computer direct plate making technology, is a very interesting new technology, but the application of these technologies will obviously increase the cost of printing manufacturers. If a printer can maintain stable color performance, the cost of closed automatic color loop control system can be compensated by reducing the waste in the preparation process. If you want to install a reliable preset system, this compensation is difficult to achieve

components such as wetting device can control the amount of water in the minimum range during the printing process to minimize the emulsification speed. The inking roller system is now designed so that there is no shortage of ink, even at high speeds. The current printing machine has better point reproduction and higher efficiency. Even if the staffing is not particularly high-quality, in the case of high operating speed, the quality can still be maintained higher and more stable, and waste in work can be reduced to a great extent. Because the printing machine is a complete system, the machine function is better

part of a complete integrated system

in order to make the system

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