Scraper selection and installation. High-speed gravure printing machines are generally made of high-elastic steel squeegees with a thickness of 150 to 180 μm. When installing the squeegee, note that both sides of the squeegee should be longer than the plate 10 ~ 20mm to prevent the ink of the plate from splashing on the roller. Reasonably adjust the squeegee. The pressure, sharpness of the squeegee, and the contact position with the plate all affect the printing quality. This article will introduce you to the principle of using the squeegee.
This periodic fluctuation will not only bring certain influence on the roller base, but also have a significant impact on the squeegee. A long period of vibration will cause the squeegee to scrape the ink uncleanly, resulting in a dirty version. The phenomenon occurs. By increasing the pressure on the squeegee blade, the problem can be solved in a short time, but the problem cannot be fundamentally solved, and at the same time, it will also have a significant effect on the service life of the squeegee.
The quality of polishing on the surface of the roll is mainly reflected in how much burr is around the perimeter of the mesh. The roll plate of good quality is clean and free from burrs. This ensures that the printing roller will not damage the squeegee during the printing process. After the frequent replacement of the squeegee, if there is still a knife line on the print, it can be generally considered that there is a polishing quality problem with the plate roller.
Pressure Japan imported ADL squeegee, Japan ADL ink affect the squeegee pressure factor is the size of the cylinder pressure, hard and soft blades of different, squeegee and plate cross angle, the greater the slope, the greater the pressure . Excessive pressure will reduce the transfer rate of the ink, and the wear of the printing plate and the blade will be large. If the pressure is too small, the dirty plate or scraper line may occur. The sharpness of the knife depends on whether it is a new knife, the angle of the knife when sharpening, the type of sandpaper (oil stone) used, etc.
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