Easy to cause plugging version of the five major causes, soft bag factory employees to keep in mind!

In the printing process, often because of some reasons which lead to mesh point of ink residue rate increased, and cause plugging version. Blocking version after light can cause printing design and blurred, print color change, or can't normal printing. So, what is the cause of the problem? Ink dry solid in the layout of residual ink in the mesh point by some factors ( If ink viscosity heighten) Will happen to the influence of part of the ink dry solid, the plate cylinder into the ink tank again, nets hole curing ink is difficult to completely dissolved, ink transfer rate decreases. Over time, the net hole blockage of more and more shallow, ink transfer rate is less and less, finally cause plugging failure. Such blocking version of fault and ink type, viscosity, solvents, drying speed, printing speed and other factors, and also has a lot to do with the structure of the printing press. Ink mixed with impurities in gravure printing speed is faster, the printing compound thin film in high speed operation may produce electrostatic, due to electrostatic adsorption, the dust in the surrounding environment and printing substrate removal of impurities such as debris will be into the ink. The mechanical impurities are the direct cause of plate mesh point congestion. To prevent this kind of accident, can in front of the circulation pump suction nozzle to install a metal mesh, 80 ~ 120 was carried out on the ink filters, to remove insoluble impurities. Ink bad, cloudy precipitate dissolve bad because of the ink flows, or due to inadequate parking after cleaning and mixed with other inks, as well as the misuse of other poor solvent such as ink dissolved, transfer rate is reduced, can also cause plugging. After ink chemical changes in the two type liquid ink or reactive ink as a continuation of the printing process, will gradually occur chemical reaction, such as crosslinking worsen, viscosity heighten ink liquidity, transfer rate is reduced, the version is likely to be blocked. So, in the use of two type liquid ink or reactive ink, should be timely clean version after downtime, and careful expired inks and ink left. In addition, different types of ink mixing may cause chemical reaction, resulting in the wall. So, should be through the experiment in advance to confirm whether different types of ink can mix. Plate making quality is low, gravure plate-making should pass the surface corrosion or sculpture, aluminum plating processing, grinding process. In the machining process, due to corrosion or carved so that the net hole inner surface is not smooth, burrs generated in grinding and Ω net hole, etc. , all have certain effects on ink transfer rate, idle condition also tend to be serious when ink transfer rate is reduced, resulting in the wall.