Analysis of Industrial Inkjet Printing Technology
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Inkjet printing equipment has always been an indispensable aid in the office with its unique convenience and speed. However, it is difficult to break through the limitations of factors such as small size, low speed, poor color image reproduction, and high requirements on substrates. It is always subject to the narrow writing buildings and cannot function in a wider industrial world.
In contrast, in the industrial field, although digital printing technologies such as traditional printing and CTP are enriching various applications in the industrial field, if "light printing" technology such as inkjet can be introduced, it can be changed to some extent under the current specific use. Traditional printing is weak, digital printing is powerless. Fortunately, there are already many well-known companies in the industry who have started to work with this!
The so-called "ink-jet printing" is a non-contact, pressure-free, non-printing printing replication technology. It has the common features of unprinted digital printing and enables variable information printing.
The principle is actually similar to many digital technologies such as CTP: firstly, the computer-loaded graphic and text information is input into the inkjet device, and then the nozzle is sprayed onto the surface of the substrate by a special device under the control of the computer. The ink droplets are directly imaged on the surface of the substrate according to the charge effect, becoming the final print. This is divided into two types: continuous inkjet printing (CIJ) and on-demand inkjet printing (DOD). Continuous: Whether it is graphic or non-graphic, ink droplets are continuously generated in a flowing manner, and then an image is formed by electric field deflection, and finally, ink droplets that are not necessary are recovered or dispersed. On-demand: Ink drops are produced only in the printed portion. Designed for printing excellent quality images, it is suitable for printing color graphics, textiles and large format billboards. It is ideal for full color and high precision printing. Printing quality is the most important consideration in this way.
On this basis, how to transform its office use into industrial applications requires improvement in the following aspects:
Speed: Inkjet printing is not currently regarded as the mainstream technology in the printing industry, so the docking with mainstream offset printing and other models has become the main application method, that is, the variable data portion is completed by inkjet, and the traditional printing is completed. Graphic transfer. In the past, the process linkage link usually adopted the “multi-group roller” mode, which artificially reduced the speed of the mainstream printer, but this also caused obvious waste of resources. Therefore, the speed increase will play a decisive role in the improvement of such variable data printing efficiency.
In some companies that produce equipment for this kind of product, printers with multiple engines have appeared. Usually, after configuring four engines, you can print up to 160 B1 pages with a resolution of 720 dpi or 400 ordinary images with a resolution of 360 dpi per hour. page. It is understood that at present, this type of printer can be configured with up to 20 engines, which will greatly increase its printing speed.
At the same time, the performance of the print head will also become an important factor affecting the speed of inkjet printing. There is data showing that the printing speed of a high quality print head will be about three times that of the normal speed under the same conditions.
Quality: For the most important quality indicators of inkjet printing - resolution, and printing speed are basically in a opposite direction, at this stage we may be "fish and bear's paw can not have both", only in the case of meeting objective requirements Choose the best "quality-to-speed ratio", which is mutually constrained and related.
Large format: Generally speaking, printing of less than 850mm × 1200mm is a general printing; and printing of a size greater than or equal to 850mm × 1200mm can be called large format printing.
Large-format inkjet printing products are now available everywhere, indicating that it is in the golden age of in-depth development and widespread adoption. Inkjet products have been applied to various fields such as large posters, short-run art reproductions, and body advertisements, and the market is experiencing rapid growth. The main areas of large-format inkjet printing are as follows.
1. Engineering design industry. Large format printers have the largest market share in computer CAD-aided design and will continue to grow. The engineering drawing printing application with CAD as the main representative has injected vitality into the development of China's large-format inkjet printing market.
2. Image output field. In this field, large format printers are the fastest growing. Applications in this area include indoor and outdoor large-format signage posters, advertisements, decorating and A3 format advertising. Photo studios often use high-precision inkjet printers to print photos. Multi-variety and small-volume jobs are more suitable for inkjet printing. It can quickly and efficiently solve the market demand for single-piece jobs within 200 copies.
3. Printing industry. In the proofing process in the printing industry, the effect of the inkjet printer is very close to the printing effect and is very stable. In many places, the prepress output proof can be used in this way.
After choosing the large format inkjet printing market, the choice of equipment is a problem. Inkjet printing equipment and ink systems are chosen based on the type and output of the product, all of which need to be carefully considered.
Substrate: At present, in various inkjet printing equipment, many of them have too high requirements for the quality of the substrate: the ink and the printing material must be matched correctly, the quality and condition of the printing material depend on the density, material and smoothness of the material. Degree and other characteristics. Therefore, it is important to study the quality and characteristics of printed materials to produce high quality color prints.
Among all inkjet printing methods, UV printing is recognized as a way of high compatibility. It is reported that the company's UV inkjet printer Anapurna can print on any material, which is also the inkjet printer. The expansion of the substrate has opened up a good situation.
If the inkjet printing technology is applied in the industrial field, it may open up new ideas for the current development direction of printing.