When the squeegee blade is damaged and a gap is formed, a regular knife-and-left movement line appears on the printed matter, and the knife line is relatively easy to recognize. If the gap on the squeegee is small, it can be polished to smooth and smooth with oil stone or fine sandpaper. If the gap is large, a new squeegee needs to be replaced. When replacing a new knife, the ink accumulated in the pressure blade and the sipe must be completely removed, so as not to affect the flatness of the squeegee installation, and the length of the squeegee exposed to the pressure blade part should be consistent, about 5mm, this article will be You introduce Guangdong plastic squeegee wholesale.
Such periodic fluctuations not only have a certain influence on the plate roller base, but also the effect on the doctor blade is very obvious. The long time vibration will make the doctor blade scrape dirty, resulting in dirty version. A phenomenon occurs. By increasing the pressure on the doctor blade pressure, the problem can be solved in a short period of time, but the problem cannot be solved fundamentally, and it also has a significant impact on the service life of the doctor blade.
The polishing quality of the surface of the plate roller is mainly manifested by the number of burrs around the cell. The good quality plate has a clean, no burr, and the cells are clear and there are no impurities inside. This ensures that the plate roller does not damage the doctor blade during the printing process. After the squeegee is frequently replaced, if there is still a ruled line on the printed product, it can be generally determined that there is a problem of polishing quality of the plate roll.
In addition, in the printing process, the angle and pressure between the squeegee and the printing plate must be mastered to reduce the relative friction of the squeegee to the printing plate. Generally, the angle between the doctor blade and the plate cylinder is 70° to 75°, the inclination is upward, and the blade pressure is controlled between 200 and 400 kPa.
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