The main features of the new generation of high-quality laser engraved ceramic anilox roller are: (1) YAG laser engraved mesh wall is smooth, and the ink transfer is fast; (2) The bottom of the core is even, the ink volume is uniform, and the cleaning is easy; (3) The denseness The corrosion resistance of the bonding layer is strong; (4) The volume of the WYKO detection network is accurate and consistent to ensure the standardization of printing quality; (5) The roller surface with super-strong bonding layer, super-hard ceramic layer and ultra-clean finish has long service life; (6) ) The lightweight roller base is easy to handle and easy to store.
The selection of high quality laser-engraved ceramic anilox roller is the basic condition for ensuring the printing quality and reducing the production cost.
Third, how to choose a suitable anilox roller Anilox roller must know the following basic points: (1) ink type and ink quality and adhesion viscosity; (2) printing plate is line version, field (full version) version or level version What is the number of screens? (3) Is the printing material a paper, a printed film, a self-adhesive label, or cardboard? (4) How is the shape of the cell? Is laser-engraved ceramic anilox roller, carbon dioxide engraving or YAG engraving? (5) The cable angle is 30 degrees, 45 degrees or 60 degrees...? (6) Is a rubber squeegee roller, a forward or reverse squeegee, or an enclosed squeegee system?
The number of screen lines and the amount of ink carried by the network points are the most important parameters for the production of laser engraved ceramic anilox rollers. There are two different physical quantities for the ink load on the net and the depth of the net. Advanced computer-based interference detection technology is used to carry out accurate digital detection of the amount of ink carried on the net point. The actual number of cell volume BCM/SQIN can be obtained (10 Billion cubic micrometers per square inch, BCM has become the standard measure of anilox roller cell volume. It must be pointed out here that the same BCM carries the same amount of ink, while the same number of net lines, the same depth of the net, and the amount of ink carried by them are not necessarily the same, because the amount of ink carried is also related to the shape of the net.
According to our experience in providing the laser engraved ceramic anilox roller for the flexographic printing industry for more than ten years, relevant parameters are provided for reference, see Table 1.
From the data in Table 1, it is easy to see that the number of screen lines of anilox rollers is generally about 4.5 of the number of printed screen lines; the selection of wind cavity accumulation mainly depends on the printing density, the type of ink scraped, and the type of bearing material. Because the actual printing involves many factors such as the quality of the ink, the adhesion viscosity, and the material of the printing material, the network cable/cell index has a wider range and can only be selected by multiple selections of different cable/cell parameters. to make sure. The best method is to use test anilox technology, which can help you quickly and accurately select the best network/cell index to achieve the best printing effect.
Choosing the right anilox roller can improve the printing quality and reduce the production cost, especially the selection of anilox rollers with a high number of screen lines. An anilox roller with a high number of wind lines can form a thinner and more uniform ink layer, which can meet the requirements of printing layers with a rich print layer, especially to meet the needs of its high light part, and can reduce the expansion of dots and keep a constant evenness during printing. The amount of ink transferred, of course, halo also puts higher requirements on the production of the printing plate, the printing performance of the flexographic printing ink, and the cleaning of the anilox roller and printing plate.
Fourth, how to ensure the quantitative transfer of ink roller Anilox roller to ensure that the quantitative transmission of ink is a necessary condition to ensure high-quality printing. Lack of maintenance and maintenance, and without effective means of detection, it is impossible to ensure the quantitative transfer of ink by the anilox roller, so that many of the anilox rollers that can be used continuously have to be replaced.
In general, Hidden Times anilox roll is not easy to wear, if you find that the amount of ink transferred, there is reason to suspect that the anilox roller mesh hole blocked dry ink, resin or laminated particles, only through more than 200 times the network microscope can Clearly see their existence. The most common is the dry ink, resin, etc., which occupy the volume of the cell site in the cells, resulting in ink transfer, reducing the amount of coating, especially water-based ink, it is difficult to use new ink after drying, use of general chemical solvents It is difficult to thoroughly clean, long-term use, ink loss, coupled with ink transfer, uneven coating, will not be able to get high-quality prints, and will shorten the life of the anilox roller. We use the curve shown in Figure 1 to represent the relationship between the life cycle of the anilox roller and the printing density.
In Figure 1, D1-D2 set the print density tolerance range, T1, T2... is the cycle life of the anilox roller. When the anilox roller is used to the T1 cycle, if the anilox roller is not cleaned at this time, the anilox roller passes The amount of ink will continue to fall outside the print density tolerance range. Assuming that the anilox roller is cleaned at this time, the anilox roller can be used to restore the original ink transfer amount. It can be seen that the decrease in the print density value is related to the use time of the anilox roll, that is, the degree of cleanliness of the mesh.
We must clean the anilox roller to ensure that the anilox roller transmits the ink quantitatively. Cleaning the anilox roller is divided into two aspects: daily cleaning and periodic cleaning.
First of all, daily cleaning should be done. The correct method is to clean the anilox roller immediately after shutdown, even if the machine is shut down abnormally. The special cleaning agent for anilox roller can be directly cleaned on the machine. The solvent is sprayed on the surface of the anilox roller. The fine brush is used (the ceramic anilox roller of stainless steel wire brush and the copper wire brush are used for the first metal anilox roller). Repeat brushing. It must be noted that whether it is stainless steel wire brush or copper wire, the wool wire can only scrub the surface of the anilox roller, and can not touch the depth of the net to scrub. This cleaning method is simple, fast, and low cost, and can only be used as a daily cleaning. In addition, when choosing a special cleaning agent, pay special attention to the effectiveness of the cleaning agent. Is there any damage to the anilox roller? Does it affect the environmental protection? (To be continued)
The selection of high quality laser-engraved ceramic anilox roller is the basic condition for ensuring the printing quality and reducing the production cost.
Third, how to choose a suitable anilox roller Anilox roller must know the following basic points: (1) ink type and ink quality and adhesion viscosity; (2) printing plate is line version, field (full version) version or level version What is the number of screens? (3) Is the printing material a paper, a printed film, a self-adhesive label, or cardboard? (4) How is the shape of the cell? Is laser-engraved ceramic anilox roller, carbon dioxide engraving or YAG engraving? (5) The cable angle is 30 degrees, 45 degrees or 60 degrees...? (6) Is a rubber squeegee roller, a forward or reverse squeegee, or an enclosed squeegee system?
The number of screen lines and the amount of ink carried by the network points are the most important parameters for the production of laser engraved ceramic anilox rollers. There are two different physical quantities for the ink load on the net and the depth of the net. Advanced computer-based interference detection technology is used to carry out accurate digital detection of the amount of ink carried on the net point. The actual number of cell volume BCM/SQIN can be obtained (10 Billion cubic micrometers per square inch, BCM has become the standard measure of anilox roller cell volume. It must be pointed out here that the same BCM carries the same amount of ink, while the same number of net lines, the same depth of the net, and the amount of ink carried by them are not necessarily the same, because the amount of ink carried is also related to the shape of the net.
According to our experience in providing the laser engraved ceramic anilox roller for the flexographic printing industry for more than ten years, relevant parameters are provided for reference, see Table 1.
From the data in Table 1, it is easy to see that the number of screen lines of anilox rollers is generally about 4.5 of the number of printed screen lines; the selection of wind cavity accumulation mainly depends on the printing density, the type of ink scraped, and the type of bearing material. Because the actual printing involves many factors such as the quality of the ink, the adhesion viscosity, and the material of the printing material, the network cable/cell index has a wider range and can only be selected by multiple selections of different cable/cell parameters. to make sure. The best method is to use test anilox technology, which can help you quickly and accurately select the best network/cell index to achieve the best printing effect.
Choosing the right anilox roller can improve the printing quality and reduce the production cost, especially the selection of anilox rollers with a high number of screen lines. An anilox roller with a high number of wind lines can form a thinner and more uniform ink layer, which can meet the requirements of printing layers with a rich print layer, especially to meet the needs of its high light part, and can reduce the expansion of dots and keep a constant evenness during printing. The amount of ink transferred, of course, halo also puts higher requirements on the production of the printing plate, the printing performance of the flexographic printing ink, and the cleaning of the anilox roller and printing plate.
Fourth, how to ensure the quantitative transfer of ink roller Anilox roller to ensure that the quantitative transmission of ink is a necessary condition to ensure high-quality printing. Lack of maintenance and maintenance, and without effective means of detection, it is impossible to ensure the quantitative transfer of ink by the anilox roller, so that many of the anilox rollers that can be used continuously have to be replaced.
In general, Hidden Times anilox roll is not easy to wear, if you find that the amount of ink transferred, there is reason to suspect that the anilox roller mesh hole blocked dry ink, resin or laminated particles, only through more than 200 times the network microscope can Clearly see their existence. The most common is the dry ink, resin, etc., which occupy the volume of the cell site in the cells, resulting in ink transfer, reducing the amount of coating, especially water-based ink, it is difficult to use new ink after drying, use of general chemical solvents It is difficult to thoroughly clean, long-term use, ink loss, coupled with ink transfer, uneven coating, will not be able to get high-quality prints, and will shorten the life of the anilox roller. We use the curve shown in Figure 1 to represent the relationship between the life cycle of the anilox roller and the printing density.
In Figure 1, D1-D2 set the print density tolerance range, T1, T2... is the cycle life of the anilox roller. When the anilox roller is used to the T1 cycle, if the anilox roller is not cleaned at this time, the anilox roller passes The amount of ink will continue to fall outside the print density tolerance range. Assuming that the anilox roller is cleaned at this time, the anilox roller can be used to restore the original ink transfer amount. It can be seen that the decrease in the print density value is related to the use time of the anilox roll, that is, the degree of cleanliness of the mesh.
We must clean the anilox roller to ensure that the anilox roller transmits the ink quantitatively. Cleaning the anilox roller is divided into two aspects: daily cleaning and periodic cleaning.
First of all, daily cleaning should be done. The correct method is to clean the anilox roller immediately after shutdown, even if the machine is shut down abnormally. The special cleaning agent for anilox roller can be directly cleaned on the machine. The solvent is sprayed on the surface of the anilox roller. The fine brush is used (the ceramic anilox roller of stainless steel wire brush and the copper wire brush are used for the first metal anilox roller). Repeat brushing. It must be noted that whether it is stainless steel wire brush or copper wire, the wool wire can only scrub the surface of the anilox roller, and can not touch the depth of the net to scrub. This cleaning method is simple, fast, and low cost, and can only be used as a daily cleaning. In addition, when choosing a special cleaning agent, pay special attention to the effectiveness of the cleaning agent. Is there any damage to the anilox roller? Does it affect the environmental protection? (To be continued)