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Flexographic printing press mesh roller
The screen roller is the ink roller of flexographic printing press. Its surface is made of inked holes or mesh grooves, which are used to control the amount of ink transfer during printing. The use of roller not only simplifies the structure of the ink delivery system, but also can control the thickness of the ink layer, which provides an important guarantee for improving the quality of printed products. It is known as the heart of flexographic printing press.
Type of roller
The early rollers used were mechanically carved copper rollers, and chromium plated on the copper rollers to improve wear resistance and increase the amount of ink carried.
Modern mesh roller adopts laser engraving ceramic roller technology. The two roller webs have better ink transfer performance, but the price of ceramic roller webs is high. In the printing of high-precision cable plate, printing speed up to 200m\min, ceramic roller can show its advantages of wear resistance, heat resistance, but practice has proved that: ceramic roller ink hole is easy to plug, the application must pay attention to cleaning and maintenance. Because of the coating, the ink hole is not easy to plug, but the service life is not as good as that of the ceramic roller.
Most users believe that despite the large initial investment in the ceramic roller, the long service life of this roller (especially in the case of ink delivery devices using ink scrapers) and excellent performance (laser engraving can get more delicate network cables) are enough to compensate for the additional expenditure compared with the general roller.
Cleaning of roller
The amount of ink transferred to the plate when the roller is rotating is actually a variable, which is affected by many factors. Under normal circumstances, the amount of ink filled in the ink hole can be transferred to the plate in the range of about 70-80%. Even if the stability and dispersion uniformity of the ink itself meet the quality requirements, and the manufacturing accuracy of the roller is also very high, but the amount of ink he transfers to the plate is very limited. When the stability of the quality of the printed product is seriously damaged, the fundamental reason is not the performance of the ink itself, nor the accuracy of the roller, but because the ink hole of the roller is blocked by the dry ink during the working process. Dry ink at the bottom of the ink hole, especially water-based ink, is more difficult to dissolve in new ink after drying, unless the dissolution time is very long. The blocking failure will reduce the effective ink transfer of the ink hole.
Flexographic printing press mesh roller
The screen roller is the ink roller of flexographic printing press. Its surface is made of inked holes or mesh grooves, which are used to control the amount of ink transfer during printing. The use of roller not only simplifies the structure of the ink delivery system, but also can control the thickness of the ink layer, which provides an important guarantee for improving the quality of printed products. It is known as the heart of flexographic printing press.
Type of roller
The early rollers used were mechanically carved copper rollers, and chromium plated on the copper rollers to improve wear resistance and increase the amount of ink carried.
Modern mesh roller adopts laser engraving ceramic roller technology. The two roller webs have better ink transfer performance, but the price of ceramic roller webs is high. In the printing of high-precision cable plate, printing speed up to 200m\min, ceramic roller can show its advantages of wear resistance, heat resistance, but practice has proved that: ceramic roller ink hole is easy to plug, the application must pay attention to cleaning and maintenance. Because of the coating, the ink hole is not easy to plug, but the service life is not as good as that of the ceramic roller.
Most users believe that despite the large initial investment in the ceramic roller, the long service life of this roller (especially in the case of ink delivery devices using ink scrapers) and excellent performance (laser engraving can get more delicate network cables) are enough to compensate for the additional expenditure compared with the general roller.
Cleaning of roller
The amount of ink transferred to the plate when the roller is rotating is actually a variable, which is affected by many factors. Under normal circumstances, the amount of ink filled in the ink hole can be transferred to the plate in the range of about 70-80%. Even if the stability and dispersion uniformity of the ink itself meet the quality requirements, and the manufacturing accuracy of the roller is also very high, but the amount of ink he transfers to the plate is very limited. When the stability of the quality of the printed product is seriously damaged, the fundamental reason is not the performance of the ink itself, nor the accuracy of the roller, but because the ink hole of the roller is blocked by the dry ink during the working process. Dry ink at the bottom of the ink hole, especially water-based ink, is more difficult to dissolve in new ink after drying, unless the dissolution time is very long. The blocking failure will reduce the effective ink transfer of the ink hole.
