Although the squeegee is unremarkable, it has a crucial impact on product quality for high-precision ink color printing technology. Squeegee pressure, sharpness, and contact position with the plate all have an impact on print quality. According to actual needs, reasonable adjustment of these factors can solve many problems in printing.
The squeegee is used well, it can ensure that the anilox roller is supplied with a uniform amount of ink, so that we can print the desired product. If used poorly, it is easy to cause defects such as line marks, color difference, and plugging on the surface of the printed matter. Therefore, it is very important to understand the working principle of the doctor blade and how to use the doctor blade correctly.
1. Five important indicators when using a scraper
Squeegee pressure, sharpness, and contact position with the plate all have an impact on print quality. According to actual needs, reasonable adjustment of these factors can solve many problems in printing.
1. Pressure: The factors that affect the pressure of the doctor blade are the size of the cylinder pressure, the difference between the hard and soft blades, the angle at which the doctor blade crosses the printing plate, etc. The greater the slope, the greater the pressure. Excessive pressure will reduce the transfer rate of the ink and cause greater wear on the printing plate and blade; too small pressure is prone to dirty plates or scraper lines.
2. Sharpness of the knife: The sharpness of the knife depends on whether it is a new knife, the blade angle when sharpening the knife, the type of sandpaper (stone) used, etc. The appropriate sharpness of the knife should be effective to scrape off the ink without generating wire. Too sharp scrapers are often prone to traces of wire, while at the same time wearing plates.
3. Scraper gap: The blade contacts the anilox roller. When the gap between the blade and the anilox roller is tight, the ink volume of the anilox roller will decrease, which will affect the ink transfer amount of the printing plate.
4. The flatness of the knife: the flatness and warpage of the knife mainly depend on the installation method, of course, it may also be related to the adhesion of foreign objects in the slot of the knife holder or the blade and the lining.
When the flatness of the knife is poor, some bead-like marks will appear on the edge of the printing surface, or some intermittent line marks will appear from time to time. Some people think that the above phenomenon will only occur if the ink is rough and the ink flow is not good. In fact, this situation can also occur when the knife is uneven.
5. The movement of the doctor blade: the left and right movement of the doctor blade plays an important role in reducing the doctor blade line, improving the doctor blade utilization rate, and reducing the abrasion of the plate. If the squeegee moves abnormally, you should try to improve it.
Second, there are line marks in the printing, which may be related to the scraper
The reason for the line marks in the printing is that the first is a plate injury and the second is that the scraper is not sharp. However, another reason is that foreign objects are stuck behind the blade. The solution is to move the squeegee back and forth up and down in order to get rid of the sticky objects. If you can't get rid of it, you can only stop and wipe the squeegee.
Another problem is related to the squeegee, and many people misunderstand that it is caused by ink. This refers to the occasional appearance of dozens of irregular line marks of varying lengths, which look like they are piled up by ink. It is different from the scraper line. It is not continuous, but sometimes there is no time. This is actually the scraper. The pressure is too low or the scraper is not sharp enough.
3. What should I do when solving specific problems?
Several indicators of the above scraper have both differences and similarities. When solving specific problems, one of them can be used, and sometimes it needs to be comprehensively applied to completely solve the problem. For example, when there are some intermittent ink lines, it can be solved by increasing the pressure, or by sharpening the knife; when there is a serious dirty version, it needs to be combined in several ways; first, use a sharp blade, two To increase the pressure, the third is to increase the distance between the blade and the contact surface.
Bringing a sleek and modern element into your home that embraces the virtues of nature is easy with this contemporary fountain. The design celebrates the cosmopolitan decor while the relaxing, gentle water falls help to bring in a natural element. The softly lit bowls add to the luxurious feel and look.
A modern look with a relaxing vibe, our indoor-outdoor fountain is a wonderful combination of contemporary design mixed with natural elements.
The fountain provides tranquil and meditative sound of flowing water, creating a calm atmosphere.
Fountain and Waterfalls, Bubbler Water Fountain, Waterfall Fountain Decor, Fountain with LED Light
HISMOK(SHENZHEN)TECHNOLOGY CO.,LTD , https://www.willtrademat.com