Maintenance of the hottest printing cot 0

2022-07-24
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Maintenance of printing cots

people who have been engaged in the printing and packaging industry for a long time are very aware of the importance of printing cots. On the 29th, the dry bulk shipping market continued to decline. Because it is directly related to the printing plate and is inextricably linked to the product quality, whether you are using offset printing, relief printing machine, gravure printing machine or flexographic printing machine, you are faced with how to select and debug the printing cots, and how to master its technical standards, technical parameters, performance and debugging skills. If we can not reasonably use and follow its operation rules, we will not only fail to print ideal and excellent products, but also damage the cots, make them "retire" prematurely, and shorten the service life of the printing plate. It is difficult to adjust the printing cots to the best degree and ideal point, which can not be mastered overnight. Because it has no fixed and program, it relies on the collar machine to summarize, model, excavate, innovate and sort out a set of effective printing skills in the long-term production practice, so as to serve the main melody of enterprise production of "high quality, high yield and low consumption". So it is very important to adjust the printing cots

the following is a comprehensive discussion and Analysis on the selection, use, commissioning and maintenance of printing cots, so as to better serve the production and play its due role

selection of printing cots

with the rapid development of market economy, new equipment, new processes, new materials, especially new printing equipment, have also emerged. The upgrading is also relatively timely, which has played a positive role in promoting the rapid development of the packaging and printing industry. So that the domestic printing equipment tends to be high-tech, durable and progressiveness. From the perspective of the international printing industry, some data show that some developed countries such as Europe and the United States can not help but say that they are still ahead of us in terms of printing equipment. We catch up in a hurry to shorten the distance between us. Although the printing machinery and equipment from many developed countries were introduced into the domestic packaging printing industry in the 1990s, when the printing roller needs to be replaced after a certain service life, the domestic printing cots are far less than those of the original equipment

in the past, printing enterprises all set up "glue rooms", which specialized in the production of printing cots, causing serious pollution. With the development of printing industry and the replacement of equipment, the traditional old-fashioned printing cots have been phased out because they can not meet the needs of high-speed printing machines. Its disadvantage is that it can not adapt to high temperature and high humidity environment. It becomes soft at high temperature and hard at low temperature, especially for printing gold and image plates, which hinders the improvement of printing quality

in the 1980s, the printing cots had a great revolution. The new cots are not restricted by the climatic conditions, but they are strong and corrosion-resistant. However, the high cost discourages small and medium-sized enterprises. With the rapid development of economy, it has been highly praised by the majority of users. At present, the latest generation of printing rubber roller produced in China is a bold innovation in absorbing the experience of similar foreign products, and the market is not small

commissioning and correct use of the printing cots

after the new equipment is installed in place, the technical personnel of the equipment power department and the lead machine should first install the printing cots. The installation height of the cot must be adjusted reasonably. It must be in close contact with the ink roller and the printing plate. Printing and packaging practitioners all know that the height of relief plate is 3.14mm, which is consistent with the height of type. The PS version is relatively low at 1.2mm, so you must be aware of the installation and commissioning of rubber rollers. When printing a print with a background color, the rubber roller can be adjusted lower with an error of ± 0.5mm. In this way, the same effect can be achieved when the ink roller is transmitted to the printing rubber roller and reflected on the printing plate. The printed sample is pleasing to the eye. If it is not the case, there will be ink bars, ink tracks and other phenomena

when printing text, the height of the rubber roller is basically the same as or slightly lower than the text version. In this way, the printing roller can gently rub the printing plate, so that the text can be printed very clearly and neatly. Cot wear surface is small and not easy to damage, which can extend the service life of the printing plate. If each of us can devote ourselves to research, that is, we can save the cost of rubber roller purchase and improve the printing quality. Why not. So how to master the correct use of COTS? The collar and assistant must learn to use the glue mixing stick. Before using, take out the printing plate and let the glue mixing stick stretch in and out horizontally for several times. The ink dot size on the glue mixing stick will be displayed immediately. The operator can determine the height of the printing cot according to different printing needs, and then pin the jackscrew firmly. In this way, the height of the cot will not change during high-speed printing. If we are impatient when using the cots, and are eager to achieve a plan to save trouble during debugging, the following situations will occur:

(a) the surface of the cots is damaged and slag falls off, resulting in missing pens and channels in the text printing, blurring the text, and even blind pasting and glue jumping

(b) the inking of characters is different, and even the printed products show that there are only text marks but no ink color

(c) if the rubber roller is adjusted to be too tight with the ink transfer rubber roller, the printing rubber roller will be twisted and damaged, resulting in economic losses, strong radiation effect and equipment accidents

maintenance of printing cots

high quality printing cots are the primary condition for the production of high-quality prints. The key in offset printing technology is the control of the balance between the water path and the ink path, and the balance between the water and the ink depends on the key components of the cots and the ink rollers, whose quality can directly affect the product quality. Gravure printing, embossing, flexo printing is even more so. It is so important to maintain the printing cots. Generally, the printing enterprises should maintain the equipment once a week, including the maintenance of the printing cots. The maintenance methods are as follows:

1 After daily production, the rubber roller shall be cleaned carefully and repeatedly twice

2. The designated chemical agents such as industrial alcohol must be used to clean the printing cots, and corrosive solvents must not be used

3. Take down the rubber roller as much as possible during holidays to prevent pressure deformation

4. For the protection of the surface of the printing cot, it shall be wrapped in paper and placed in a ventilated and dark place

the above is about the use and maintenance of printing cots. As long as we study and study them carefully, we will have great interest. (gengronghai) ("China Packaging News")

this article comes from a consumption of 200 (3) 00kg which is far lower than that in developed countries. The copyright belongs to the original author and is only for everyone to share and learn. If the author believes that infringement is involved, please contact us and we will delete it immediately after verification

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