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How does the bronzing machine work?

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the process of the pad printing machine is very simple. It adopts steel (or copper, thermoplastic) gravure and uses the curved surface pad printing head made of silicone rubber material to dip the ink on the gravure into the surface of the pad printing head, and then press it on the surface of the required object to print words, drawings, etc. The function of the pad printing machine is to automatically cover and scrape the ink, then the rubber head falls and sticks the ink, automatically moves above the substrate, falls and transfers the ink to the substrate. Technology Department of Shenyang Guanda Mechanical Engineering Co., Ltd

working principle of traditional bronzing machine and plate less bronzing machine:
the process flow of traditional hot bronzing is: plate loading, plate pad, hot pressing, stripping and waste discharge. The process is mainly based on the principle of hot pressing transfer
working principle of the new version free hot stamping machine: the core of the version free hot stamping technology is the print head. The hot stamping points in the version free hot stamping machine are realized by the print needle. Therefore, the image and text of version free hot stamping is actually the aggregation of countless hot stamping points, which is similar to the resolution of the computer screen. The smaller the hot stamping point, the smoother the edge of the image and the finer the hot stamping image, which is the same as the pixels of digital photos, Therefore, the version less bronzing machine is also called digital bronzing machine
advantages of five plate bronzing machine: it creatively realizes plate free, digital and on-demand hot stamping, and has become a great innovation that can meet the digital needs of digital printing machine for post press digitization.

1. Introduction to the working principle and classification of the bronzing machine
the principle of bronzing is to cover the bronzing paper with the existing color on your substrate through the adjustment of pressure and time. Then the bronzing paper passes through the action of temperature and pressure, its glue layer begins to combine with the substrate, and then separates from the basic layer through the separation layer of the bronzing paper, The remaining glue layer, electroplated layer and color layer are hot stamped on your substrate
at present, the bronzing machines for paper processing that can be seen in the domestic and foreign markets can be divided into three categories: flat pressing, round pressing and round pressing according to the working principle. Among the flat pressing and bronzing machines, the representative brands are: boster, Switzerland, Kish, Yahua, Yutian, etc. Hot stamping dual-purpose machine is the most popular flat press and bronzing machine at present, and the most commonly used manual bronzing machine also belongs to the category of flat press and bronzing machine. Among the circular press and bronzing machines, the representative brands are: Germany stora foiljet, and other brands used to match the rotary printing press. The above bronzing processes have their own characteristics. It can not be simply said that one process is better than other processes. Users should comprehensively consider their actual production situation, adopt appropriate processes and choose appropriate equipment
in the field of packaging and printing, the flat pressing and bronzing process is widely used because its equipment usually has the dual functions of bronzing and bronzing. For users, when the bronzing business volume is unstable or insufficient to ensure the full load operation of the equipment, the use of flat pressing, hot stamping and die-cutting dual-purpose machine can ensure the investment benefit. At the same time, in terms of technology, flat pressing and bronzing is also the most mature bronzing process, and the production of bronzing plate can be solved in China. In addition to the general plane bronzing plate, it can also be made into a three-dimensional engraving bronzing plate to achieve one-time molding of bronzing and pressing concave convex
at present, the production speed of high-speed flat press bronzing machine has reached a relatively high level. For example, the bronzing machine and production speed of boster have reached 7000-7500 sheets /hour, and the hot stamping hologram has also reached 6000 sheets /hour. The domestic Yahua bronzing machine has also reached the calibration speed of 5000 sheets /hour
however, the flattening process also has its defects. For example, the effect of large-area bronzing is not as good as the other two processes, because the pressure of the flattening bronzing machine is plane pressure, while the pressure of the circular flattening or circular bronzing machine is linear pressure
for the same reason, large-scale bronzing should also be avoided for aluminum foil cardboard widely used in China
round embossing and bronzing adopts flat bronzing plate and round embossing cylinder. The flat bronzing plate is easy to make, and the circular embossing cylinder makes its hot stamping pressure linear, which makes up for the deficiency of the flat pressing and bronzing process
the disadvantage of round flattening and bronzing is that bronzing and pressing concave convex can not be formed at one time, and the production speed is relatively slow, usually 2000-2500 sheets /hour
in European and American countries, printing plants that specialize in bronzing usually have two kinds of bronzing machines: flat pressing and round pressing. The two processes complement each other to overcome their shortcomings and meet the needs of different designs at the same time
there are common Taiwan funded ironing machines in China. The equipment is refitted from the Old Heidelberg machine, which may be limited by the processing capacity. The accuracy of the equipment is slightly low, but the price is low, which makes it get a considerable market share. Round pressing crafts are usually used in rotary printing production lines, such as narrow width rotary flexographic press, to realize on-line processing. In recent years, the rotating equipment has the trend of changing to large-scale equipment, such as the equipment of ShangBang, France. Stalin stora in Germany was the only equipment that used the round pressing and hot stamping process for sheet fed paper
the biggest advantage of round pressing and hot stamping is high speed. For example, the speed of foijlet bronzing machine of stora can reach 12000 sheets /hour. The disadvantages of round pressing and bronzing are also very obvious. The first is the bronzing plate, which is not only expensive, but also demanding. We must consider the thermal expansion coefficient of the material, the wear of the plate and other factors. Secondly, there are special requirements for hot stamping foil, that is, it must be able to transfer quickly. At present, it is difficult for domestic aluminum foil to meet this requirement. Expensive imported special materials must be used, otherwise, its high production speed is just empty talk
in addition, bronzing and concave convex must be realized on two units. Even if the registration error is not considered, at least two sets of molds are required, which virtually increases the cost. Once the market changes and the bronzing business volume shrinks, high-value equipment may be a pile of scrap iron with no other functions, and the investment risk is quite high. All these have limited the application of circular pressing and bronzing process. Unless users can be sure that their business is a single bronzing product, there is little need to replace the product, and the amount can ensure the recovery of equipment investment, it is difficult for such equipment to really enter the market in China. This is why such equipment is rarely seen in China
when investing, users need to take into account the characteristics of the above crafts and the needs of their own production, and choose appropriate processes and equipment< Br> making bronzing plate is the key of bronzing technology. Traditional bronzing templates (such as zinc plate, copper plate, silica gel plate, etc.) cannot be completed without expensive equipment and technology. The problem of long external processing time and high plate making cost seriously restricts the development of bronzing business for small and medium-sized processors with small batch and short production time requirements. If you can make your own bronzing plate with little investment, it will bring good development prospects to the development of bronzing business. It will also bring good economic benefits to processors
2. Bronzing principle: the process mainly uses the principle of hot pressing transfer. Under the action of pressing, the anodized aluminum contacts with the hot stamping plate and the substrate. Due to the heating of the electric heating plate, the hot stamping plate has a certain amount of heat. The heating of anodized aluminum melts the hot-melt dyeing resin layer and adhesive, and the viscosity of the dyeing resin layer decreases. After the melting of the special thermal adhesive, the viscosity increases, and the aluminum layer and the anodized base film are peeled and transferred to the substrate at the same time, With the removal of pressure, the adhesive cools and solidifies rapidly, and the aluminum layer is firmly attached to the substrate to complete a hot stamping process
from the composition and hot stamping mechanism of electrochemical aluminum, in order to obtain ideal hot stamping effect, the electrochemical aluminum foil used for hot stamping must meet the following requirements: the bottom layer must be painted evenly without obvious color difference, color stripe and color spot; The primer coating shall be uniform, smooth, white and free of impurities, without obvious stripes, sand spots and oxidation; Good gloss; Strong firmness; High definition; Correct model

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