Advantages of gravure press in reducing pollution and throttle
Author： 附近約學生約200塊隨叫隨到的-博約網Publication time：2018-06-04 09:55:02Views：2513【SLM】
In the stage of rapid development of China\'s economy, the contradiction between economic growth and environmental pollution and the expansion of cost is becoming more and more intense, but this con...
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In the stage of rapid development of China's economy, the contradiction between economic growth and environmental pollution and the expansion of cost is becoming more and more intense, but this contradiction is not incompatible. Green printing is popular in the highly polluting printing industry. In the process of continuous improvement of printing equipment, how to make gravure printing machine have advantages in saving cost and reducing pollution?
Gravure printing is commonly used for high-speed printing of high quality multicolor long live parts. The roller used for it is called intaglio. These rollers are usually iron, copper and a photosensitive layer. After printing the small groove representing the image area on the plate, plating chrome is also needed.
The plate roller of the gravure press is usually directly contacted with the image bearing material. So before the roll is out of the ink slot and before contact with the bearing material, there must be a scraper to scrape the ink on the surface of the roller, then the press and the capillary action of the material can be used to transfer the ink in the concave hole to the printing press, and the gravure press is mostly roll. A cylinder type printing machine, which is continuously printed with a reel.
Intaglio ink is generally a solvent type. At present, there is a tendency to use water-based ink, but the process of using solvent ink can run much faster than water based ink, because the evaporation of solvents is conducive to the drying of ink. The printing color used in the general intaglio process is 8 - 10 color higher than that of the concave printing. The printing process usually includes the bearing material, the plate roll, the embossing roll, the ink system, the ink viscosity control, the solvent recovery system, the drying furnace, the on-line cutting and stripping device, the quality control system, and the finished product.
The printing material will affect the printing process: how the ink is transferred to the surface of the substrate, how the ink is on the surface of the substrate, how the ink is dry or the surface is absorbed, and how the printer operator controls the set. Ordinary substrates include coated, uncoated paper, cardboard, food packaging paper, foil and metal paper. It is not commonly used to have Sai - porphyrite, polyurethane and fabric. Gravure proofing is usually done online, sometimes using proofing machines.
Gravure is made by engraving or etching. The chromium plated plate will increase hardness and increase resistance to India. The depth and shape of the solvent based ink used in engraving or etching will be different from that of water-based ink. In general, the perimeter of the roller is determined by the size of the printing press and the size of the printed image.
According to the gravure press, there are two kinds of roller: aluminum copper plating and iron copper plating. In the preparation version, the roller is heated in hot water and then placed in chloric acid solution to remove the chromium layer and rust layer. Then rinse clean, iron roller nickel plated, solid copper coating, aluminum roller galvanized to achieve the same day. Before the copper roller is plated with copper, it will also be treated with cyanide. The process is chrome plated and ready for proofing.
There are some ways to solve the pollution problem caused by gravure printing. Each method should be taken into account in terms of cost and resource consumption. The printing staff should establish a cooperative relationship with their main source and material suppliers so that the suppliers can provide the necessary technical support in time to ensure the quality of high quality products and reduce pollution and waste as much as possible. The use of lighter ink groove, improved scraper technology to reduce the amount of ink. Steam recovery system is a great way to reduce solvent pollution.
In many equipment improvement methods can reduce pollution. Gravure press manufacturers use new technologies for their machines and install several processes to improve their control accessories on their equipment. The use of rapeseed oil instead of gasoline as a solvent and the use of water based ink will reduce environmental pollution, and it is also a good way to replace the current solvent with small contaminated solvent materials.
The above methods, neither affect the efficiency of the printing machine, but also save the cost and reduce pollution. In the green and environmental printing industry, it is inevitable that it is the trend of the times.
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