Different squeegees have different lifespans. Can you pick them right?
Analysis of the type and service life of the squeegee There are two types of squeegee according to the shape: a common pointed squeegee and a cross-sectional squeegee, and a cross-sectional squeegee is commonly used. Combined scrapers are relatively more suitable for shallow web printing. For long-run printing jobs, use a high-quality scraper. In general, the faster the speed and the wider the substrate, the higher the quality requirements for the blade. The cross-section squeegee has a long service life, and the squeegee is accurate because the machining angle of the contact portion between the squeegee and the roller is very precise. Although the blade of the squeegee is constantly worn during the printing process, the contact area remains constant throughout the length of the blade, so the tone of the image after printing does not change. Since the contact area of ​​the cross-section scraper and the printing cylinder is always constant, the constant pressure of the doctor blade can be ensured. At the same time, the pressure of the squeegee can be kept to a minimum, the wear of the squeegee is reduced, and the service life of the plate cylinder is prolonged. Ordinary pointed squeegee has a limited service life. Since the ordinary squeegee is pre-grinded, the blade edge can only be contacted by the edge of the blade. As the blade is gradually worn, the cross-sectional area of ​​the contact portion is also continuously increased, which is very disadvantageous for the ink scraping, which causes a change in the tone value of the image after printing. In this case, in order to ensure the consistency of the printed matter, it is necessary to constantly adjust the squeegee, which also causes waste of materials and takes a certain amount of time. In the case of printing a granular ink such as a metal ink or a pearl ink in a cigarette packet, a bladeless blade can be used to improve the printing durability. Whether it is an old doctor blade or a new blade, it must be re-polished before it is put on the machine. Analysis of the type and service life of the squeegee There are two types of squeegee according to the shape: a common pointed squeegee and a cross-sectional squeegee, and a cross-sectional squeegee is commonly used. Combined scrapers are relatively more suitable for shallow web printing. For long-run printing jobs, use a high-quality scraper. In general, the faster the speed and the wider the substrate, the higher the quality requirements for the blade. The cross-section squeegee has a long service life, and the squeegee is accurate because the machining angle of the contact portion between the squeegee and the roller is very precise. Although the blade of the squeegee is constantly worn during the printing process, the contact area remains constant throughout the length of the blade, so the tone of the image after printing does not change. Since the contact area of ​​the cross-section scraper and the printing cylinder is always constant, the constant pressure of the doctor blade can be ensured. At the same time, the pressure of the squeegee can be kept to a minimum, the wear of the squeegee is reduced, and the service life of the plate cylinder is prolonged. Ordinary pointed squeegee has a limited service life. Since the ordinary squeegee is pre-grinded, the blade edge can only be contacted by the edge of the blade. As the blade is gradually worn, the cross-sectional area of ​​the contact portion is also continuously increased, which is very disadvantageous for the ink scraping, which causes a change in the tone value of the image after printing. In this case, in order to ensure the consistency of the printed matter, it is necessary to constantly adjust the squeegee, which also causes waste of materials and takes a certain amount of time. In the case of printing a granular ink such as a metal ink or a pearl ink in a cigarette packet, a bladeless blade can be used to improve the printing durability. Whether it is an old doctor blade or a new blade, it must be re-polished before it is put on the machine. Article source address: http:// Crochet Carpets,Small Carpets,Crochet Carpet Pattern,Giant Crochet Rug Shandong Guyi Crafts Co.,Ltd , https://www.guyicraftscn.com