The anilox roller is the “heart†of the flexo press. With the higher and higher requirements for the anilox roller in the mid-to-high flexographic printing, the anilox roller manufacturers are constantly improving the laser engraving technology, innovating, and flexographic printing. A higher grade advances. Understanding the development history of the anilox roller helps the flexo printing technician to order or purchase the appropriate anilox roller according to the factory's printing requirements.
Mechanical engraving chrome plated roller
This is the original form of engraved anilox roller, using surface chrome plating, mechanical engraving, applied to the printing and coating of slightly larger cartons or plastics. When the aluminum-plated anilox roller is used at the beginning, the printing effect is not bad, but because the metal surface is relatively easy to wear, the service life of the anilox roller is very short. In addition to the limitations of the shape of the mechanical engraving mold, the number of lines cannot be increased, and it is difficult to meet the need for mid-range flexographic printing. Over time, it will gradually be replaced by a ceramic roll.
CO2 Laser Engraving Ceramic Anilox Roller
At present, most laser anilox roller engraving manufacturers use traditional CO2 laser engraving technology. This type of effective network cable is about 80-300lpi, which can meet the basic needs of medium-to-low carton printing and can print full-tone and thick text. The invention of the laser ceramic anilox roller has greatly improved the printing quality of the flexographic printing. However, because the dots carved by the CO2 laser are not clear enough and the openings are not wide enough, the cable cannot be improved. In addition, when the CO2 laser is engraving ceramics, a magmatic surface is inevitably left on the inner wall of the mesh, which can easily cause ink or ink clogging. In addition to the wear resistance of the ceramic surface layer, its print quality still stays at the middle and low level of printing, and it is difficult to meet the high requirements of today's flexographic printing.
YAG laser engraving ceramic mesh roller
Flexo printing is characterized by "high speed, environmental protection, and economy", so it has been widely used in the 1990s. The emergence of YAG laser technology has given rise to a certain improvement in the number of screen lines and the clarity of the mesh, which can be combined with flexographic printing with slightly higher resolution. The disadvantage is that the YAG laser is difficult to maintain stable during engraving, making it difficult to control the consistency of the mesh shape of the entire anilox roller, and it is easy to cause uneven ink in different parts.
Ultracell Super Mesh Laser Engraving Ceramic Anilox Roll
High-grade flexographic printing requires a new type of laser anilox roller with high strength, high number of lines, uniform mesh texture, sufficient and stable ink, and long life. At present, the technologies that are more mature are the "Ultracell supercell" and "Ultracell-Plus Supercell-enhanced" laser ceramic anilox roller launched by the APEX company in the Netherlands.
The ultracell supercell type cell site is extremely clear, the inner wall of the cell is smooth, and the density and tension of the ceramic are strengthened, so that the corrosive cleaning solution hardly penetrates into the roller base, and ink and ink are not easily blocked in the cell. The effective network cable (200-800 lpi) is greatly improved. When the same mesh height, the amount of ink carried is increased by 10-15% compared with the C02 type, which is suitable for stickers, envelopes, and fine text printing. The invention made the quality of flexographic printing unprecedentedly improved, and finally made the flexo printing change from "crude" to "thin".
Ultracell-Plus Supercell-enhanced cells are more delicate, and the cable is greatly improved. The effective cable is 400-2000 lpi and the highest is 2540 lpi (Of course, the actual application does not require a roller with more than 1500 lpi), and the same mesh At high altitude, the ink loading is increased by more than 30% compared to other anilox rollers, especially when the number of lines is high, the ink volume is more than 70% higher. Excellent ink-conducting performance, extremely low dot diffusion, and can fully meet the printing requirements of using CTP fine plate. Its printing quality has almost reached the offset printing effect, breaking the shackles of the past, "flexible printing can not print fine packaging," in the cosmetics box, medicine boxes, tobacco boxes, luxury packaging boxes, security printing and other fields, flexo printing can be the first time with offset The court’s resistance to courtesy has made it possible for the global printing industry to have a “big flexographic trendâ€. This achievement was widely used in Europe and the United States, where flexo requirements were extremely high, and then became popular in some high-grade flexo factories in Hong Kong and Southeast Asia.
The new development of high line count net effect roller load
In China, due to the obsolete flexo printing technology and theoretical constraints, some people in the industry believe that when the cable reaches 800 lpi or so, the amount of ink will inevitably decrease. (For example, some printing factories order the YAG type anilox roller at 800 lpi The amount of ink is only about 2.0 BCM), so we had to separate the high-line counts from the ground and the hierarchical network. Even so, the color density of the hierarchical network is also subdued. Sometimes, printing companies have to reduce the number of anilox roller lines in order to obtain sufficient ink volume, but they often cause negative effects such as “blocking plates†and affect the exquisite degree of printed materials. This is a dilemma. In Europe and the United States, due to the emergence of the APEX Ultracell-Plus supercell enhancement type, this embarrassing situation has already been completely improved. Ultracell-plus's unique engraving technology enables high ink counts at high line counts (eg 3.4-4.OBCM at 800 lpi), almost twice that of other anilox rollers. This is undoubtedly a good news for premium flexo printing!
Anilox roller sleeve and air expansion shaft replacement position
The printing industry's requirements for flexo printing, in addition to the improvement of printing accuracy, include small batches, rapidity, and flexibility. If you need to print more patterns and colors in a short time, you need to quickly change the anilox roller. The traditional replacement method takes time and effort. Nowadays, manufacturers have developed a quick replacement mechanism for sleeves and air rollers to make the replacement of anilox rollers extremely convenient and quick.
Mechanical engraving chrome plated roller
This is the original form of engraved anilox roller, using surface chrome plating, mechanical engraving, applied to the printing and coating of slightly larger cartons or plastics. When the aluminum-plated anilox roller is used at the beginning, the printing effect is not bad, but because the metal surface is relatively easy to wear, the service life of the anilox roller is very short. In addition to the limitations of the shape of the mechanical engraving mold, the number of lines cannot be increased, and it is difficult to meet the need for mid-range flexographic printing. Over time, it will gradually be replaced by a ceramic roll.
CO2 Laser Engraving Ceramic Anilox Roller
At present, most laser anilox roller engraving manufacturers use traditional CO2 laser engraving technology. This type of effective network cable is about 80-300lpi, which can meet the basic needs of medium-to-low carton printing and can print full-tone and thick text. The invention of the laser ceramic anilox roller has greatly improved the printing quality of the flexographic printing. However, because the dots carved by the CO2 laser are not clear enough and the openings are not wide enough, the cable cannot be improved. In addition, when the CO2 laser is engraving ceramics, a magmatic surface is inevitably left on the inner wall of the mesh, which can easily cause ink or ink clogging. In addition to the wear resistance of the ceramic surface layer, its print quality still stays at the middle and low level of printing, and it is difficult to meet the high requirements of today's flexographic printing.
YAG laser engraving ceramic mesh roller
Flexo printing is characterized by "high speed, environmental protection, and economy", so it has been widely used in the 1990s. The emergence of YAG laser technology has given rise to a certain improvement in the number of screen lines and the clarity of the mesh, which can be combined with flexographic printing with slightly higher resolution. The disadvantage is that the YAG laser is difficult to maintain stable during engraving, making it difficult to control the consistency of the mesh shape of the entire anilox roller, and it is easy to cause uneven ink in different parts.
Ultracell Super Mesh Laser Engraving Ceramic Anilox Roll
High-grade flexographic printing requires a new type of laser anilox roller with high strength, high number of lines, uniform mesh texture, sufficient and stable ink, and long life. At present, the technologies that are more mature are the "Ultracell supercell" and "Ultracell-Plus Supercell-enhanced" laser ceramic anilox roller launched by the APEX company in the Netherlands.
The ultracell supercell type cell site is extremely clear, the inner wall of the cell is smooth, and the density and tension of the ceramic are strengthened, so that the corrosive cleaning solution hardly penetrates into the roller base, and ink and ink are not easily blocked in the cell. The effective network cable (200-800 lpi) is greatly improved. When the same mesh height, the amount of ink carried is increased by 10-15% compared with the C02 type, which is suitable for stickers, envelopes, and fine text printing. The invention made the quality of flexographic printing unprecedentedly improved, and finally made the flexo printing change from "crude" to "thin".
Ultracell-Plus Supercell-enhanced cells are more delicate, and the cable is greatly improved. The effective cable is 400-2000 lpi and the highest is 2540 lpi (Of course, the actual application does not require a roller with more than 1500 lpi), and the same mesh At high altitude, the ink loading is increased by more than 30% compared to other anilox rollers, especially when the number of lines is high, the ink volume is more than 70% higher. Excellent ink-conducting performance, extremely low dot diffusion, and can fully meet the printing requirements of using CTP fine plate. Its printing quality has almost reached the offset printing effect, breaking the shackles of the past, "flexible printing can not print fine packaging," in the cosmetics box, medicine boxes, tobacco boxes, luxury packaging boxes, security printing and other fields, flexo printing can be the first time with offset The court’s resistance to courtesy has made it possible for the global printing industry to have a “big flexographic trendâ€. This achievement was widely used in Europe and the United States, where flexo requirements were extremely high, and then became popular in some high-grade flexo factories in Hong Kong and Southeast Asia.
The new development of high line count net effect roller load
In China, due to the obsolete flexo printing technology and theoretical constraints, some people in the industry believe that when the cable reaches 800 lpi or so, the amount of ink will inevitably decrease. (For example, some printing factories order the YAG type anilox roller at 800 lpi The amount of ink is only about 2.0 BCM), so we had to separate the high-line counts from the ground and the hierarchical network. Even so, the color density of the hierarchical network is also subdued. Sometimes, printing companies have to reduce the number of anilox roller lines in order to obtain sufficient ink volume, but they often cause negative effects such as “blocking plates†and affect the exquisite degree of printed materials. This is a dilemma. In Europe and the United States, due to the emergence of the APEX Ultracell-Plus supercell enhancement type, this embarrassing situation has already been completely improved. Ultracell-plus's unique engraving technology enables high ink counts at high line counts (eg 3.4-4.OBCM at 800 lpi), almost twice that of other anilox rollers. This is undoubtedly a good news for premium flexo printing!
Anilox roller sleeve and air expansion shaft replacement position
The printing industry's requirements for flexo printing, in addition to the improvement of printing accuracy, include small batches, rapidity, and flexibility. If you need to print more patterns and colors in a short time, you need to quickly change the anilox roller. The traditional replacement method takes time and effort. Nowadays, manufacturers have developed a quick replacement mechanism for sleeves and air rollers to make the replacement of anilox rollers extremely convenient and quick.
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