Gravure printing machine advantages in reducing pollution and throttling

At the stage of rapid economic development in China, the contradiction between economic growth and environmental pollution and cost expansion has intensified, but this contradiction is not unmatched. In the highly polluting printing industry, green printing is popular. In the continuous improvement of many printing equipment, how to make the gravure printing machine have great advantages in saving costs and reducing pollution?

The gravure printing method is generally used for high-speed printing of high-quality multicolor long-lived jobs. The plate rollers it uses are called intaglio. These plate rollers are generally iron, copper plated and a photosensitive layer. After the small grooves representing the image area are made on the plate, chromium plating is also required.

Gravure printing machine plate roller is usually in direct contact with the image printing material, so before the plate roller out of the ink tank, contact with the printing material, it must be scraped to scrape off the roller surface of the ink, and then press the pressure roller and The capillary action of the printing material transfers the ink in the recessed hole to the substrate. The gravure printing machine is mostly a roller type printing machine and uses a roll for continuous printing.

Gravure inks are generally solvent-based. There is currently a trend to use water-based inks, but the process using solvent inks will run much faster than water-based inks, because the volatilization of solvents favors the dryness of the ink. The gravure printing process generally uses 8-10 colors which are higher than the concave color printing. The printing process generally includes printing materials, plate rollers, embossing rollers, ink system, ink viscosity control, solvent recovery system, drying furnace, and online printing. Cutting and peeling device, quality control system, get the final product.

Printing materials can affect the printing process: for example, how the ink is transferred to the surface of the substrate, how the ink is on the surface of the substrate, how the ink dries or is absorbed by the surface, and how the press operator controls the registration. Common substrates include coated, non-coated paper, cardboard, food packaging, foil and metal paper. Not commonly used are celluloids, polyurethanes and fabrics. Gravure printing is usually done online, sometimes with a proofer.

The gravure is made by engraving or etching, and the resulting plated chrome will increase hardness to increase resistance to India. The version used for solvent-based inks differs from water-based inks in engraving or etching depth and shape. In general, the water-based ink is engraved on the plate, and the circumference of the plate roller is determined by the size of the printing press and the printing image.

According to different printing presses, there are two types of aluminum rollers: copper plated copper and iron plated copper. In preparing the plate, the rollers are heated in hot water and then placed in a chloric acid solution to strip the chromium and rust layers. Then rinse clean, iron roll nickel plating to stabilize the copper plating, aluminum roller galvanized to achieve the same day. Before the aluminum roll is plated with copper, it must be treated with cyanide foreign material. The engraving process is chrome plating and is ready for proofing.

There are other ways to solve the problem of pollution caused by gravure printing. Each method should be considered in terms of cost and resource consumption. The printing staff must establish a cooperative relationship with their major source material suppliers so that suppliers can provide the necessary technical support in a timely manner to ensure the quality of high quality products while minimizing pollution and waste. Use a shallower ink tank, improved scraper technology to reduce the amount of ink. The steam recovery system is the largest way to reduce solvent-borne pollution.

Improvements in many devices can reduce pollution. Printer manufacturers use new technology for their machines and install several process improvement control accessories on their equipment. The use of rapeseed oil as a solvent for gasoline and the use of water-based inks will reduce environmental pollution, and the use of less-polluting solvent materials is a good way to replace current solvents.

The above-mentioned several methods do not affect the printing machine's working efficiency, but also can save the cost, reduce the pollution, in the main printing green industry's printing industry must be the general trend.