At present, with the gradual maturity of the market and the diversity of orders, most flexographic machinery factories are faced with the pressure of how to achieve a rapid plate changing system. How to quickly change plates and anilox rolls is a problem that flexo manufacturers must face. In foreign countries, almost 90% of wide-format flexo presses have used sleeve-type plate roller and anilox roller technology to facilitate customers' plate-changing operations; in China, domestically-made equipment using rapid plate changing technology is gradually increase. It can be said that the rapid plate changing technology has become an important technical indicator to measure whether the flexo printing machine is advanced.
The traditional shaft-type plate roller has low efficiency, and the loading and unloading plate is time-consuming, labor-intensive, poor in safety, inconvenient to store, poor in flexibility, non-standardized, and the like, and is incompatible with the development of modern flexo printing. The sleeve changing technology is fast, light and safe, and will promote the development of flexo printing towards high quality, high safety and high standardization. Shanghai Aokeli has been committed to the promotion of sleeve technology in China. After years of promotion, the domestic flexographic machinery factory and printing factory have adopted sleeve technology more and more. Qingzhou Yigaofa's wide-format compact flexo press has adopted the stud sleeve technology. This year is also a year in which the domestic flexographic machinery factory adopts sleeve technology. In October, the Shaanxi Northwest Sleeve Satellite Flexo Printing Machine was successfully launched. In December, the satellite flexo printing machine demonstration was successfully held in Xi’an Aerospace Huayang. The demonstration of its first sleeve satellite flexo press was also very successful. These manufacturers of sleeve-type anilox rolls and plated sleeves are supplied by Aucley and Flint. In the near future, a southern equipment manufacturer will introduce a sleeve-type satellite flexo press, and its sleeve product is also provided by Ao Ke Li. The development of domestic flexo to today, the gradual adoption of sleeve technology, has to be said to be a milestone in the development of China's flexo printing.
The application of sleeve technology in flexo printing includes sleeve type anilox roll (referred to as sleeve anilox roll), sleeve type plate roll (referred to as plate sleeve) and sleeve type plate (referred to as seamless plate) )Wait. The following is a description of the relevant knowledge and technical issues of the sleeve product.
First, the installation and removal of the sleeve
The sleeve is typically mounted on the gas lift core. The loading and unloading principle of the sleeve is shown in the figure. The gas rising core has an air inlet hole at one end, and some air holes are arranged on the surface, and the air inlet holes communicate with the air holes. When the compressed air is filled from the air inlet of the gas rising core, the compressed air is discharged from the air hole of the gas rising core. When the sleeve is installed toward the air rising core, it will be in the middle of the gas rising core surface and the inner wall of the sleeve. Forming a layer of air cushion, so that the inner diameter of the sleeve expands and expands on the air-lifting core, so that the sleeve can be arbitrarily moved back and forth on the air-up core. When the position is determined, the air source is cut off, and the sleeve can be tightly closed. The solid is no longer displaced on the gas core. Disassembling the sleeve is the same principle and procedure. The sleeve anilox roll, the plate sleeve, and the seamless plate sleeve are installed in the same principle.
Second, the structure and classification of the sleeve
The sleeve is made by winding technology and consists of three layers: basic sleeve, compressible layer and surface polymer (rubber, resin or metal aluminum). Each layer is wound on the surface of the mandrel and bonded with resin. Together.
The basic sleeve consists of glass fibers; the compressible layer consists of a special urethane rubber (a mixture of glass particles, glass fibers and resin); the surface layer consists mainly of a hard polymer coated with rubber or synthetic material, textured The surface layer of the roller sleeve is mainly composed of metal aluminum or nickel.
Plate sleeve
The plate sleeve is specially used for mounting the plate, and the plate is mounted on the plate sleeve with double-sided tape. The wall thickness of the sleeve can be arbitrarily selected from 1.5 to 100 mm, and the same inner diameter is installed on one gas-lifting core. The outer diameter (wall thickness) sleeve is used to achieve the various printing perimeters required. ROTEC MEGA sleeves have a wall thickness of 10 to 70 mm and a printing circumference of nearly 400 mm. In general, the wall thickness of the plated sleeve is preferably 25 mm. Because the thicker the sleeve wall, the higher the processing cost. In order to achieve a larger printing circumference, it is possible to save the use cost by replacing the larger diameter gas-lifting core and installing a thinner wall-thickening sleeve. The inner diameter of the sleeve is different from that of Figure 2 Rotec Sleeve Sleeve Table 1Rotec Sleeve Part Technical Data (Unit: mm) Sleeve Sleeve Air Outer Core/Diameter Error ±0.020±0.015 Large Standard Full Jump Error 0.0250.010 Large Cylindricity Error 0.0250.005 gas rise core diameter is less than 0.038mm.
According to the structure and function, the plate sleeve can be divided into a basic sleeve, a lightweight sleeve, an air cushion sleeve, a bridge sleeve and a self-adhesive sleeve.
(1) Basic sleeve
The basic sleeve is made of special multi-layer FRP fiber by winding technology and is mainly used for processing plate sleeves, jointless sleeves and sleeve anilox rolls.
(2) lightweight sleeve
The lightweight sleeve is a rigid sleeve designed for use with plain and foam-coated double-sided tape. The inner layer is a glass fiber reinforced basic sleeve, and the outer layer is a rigid polyurethane layer. The lightweight structure is suitable for the beating of all printing webs, and the wall thickness is 1 to 100 mm. Rotec's lightweight sleeve is blue, and the surface of the blue lightweight sleeve is a hard polymer that has been processed. It is very hard, has high hardness, impact resistance and cutting resistance. It needs to have the performance of foam cushion. The plated tape is attached to the sleeve.
(3) Air cushion sleeve
The air cushion sleeve is designed to match the thin printing plate. It is suitable for large-area solid printing. The surface is soft compressible material, which reduces the requirement for double-sided tape. It is the standard matching set for DuPont and Flint laser. cylinder. Rotec's air-cushion sleeves are black, and the black air-cushion sleeves are specifically designed for laser plate-making technology and high-quality thin plates. The surface material is an elastic, compressible polyurethane foam with excellent compression properties, and a thin adhesive tape (thickness 0.1 mm) with a high viscosity is used to paste the printing plate. The black air cushion sleeve surface not only has good toughness, high processing precision, but also has high compressibility and can absorb the vibration of the machine. The combination of the black air cushion sleeve and the thin printing plate, the dot enlargement is small, and the fine high-gloss dot can be realized, which is suitable for the printing of high quality and fine products. Other advantages of the black air cushion sleeve include: the ability to meet the requirements of both the ground and the high mesh point on one sleeve, and the printing effect is good; the wear on the printing plate is reduced, the service life of the printing plate is prolonged, and the resilience is high. Shock absorption performance, improve machine printing speed, high production efficiency; simple use of tape, conducive to the standardization of flexographic printing.
(4) Bridge sleeve
The bridge sleeve is suitable for the sleeve sleeve system, which can reduce the wall thickness of the sleeve, save the cost of making a thick sleeve, and simplify the assembly.
(5) Self-adhesive sleeve
The self-adhesive sleeve is a layer of air-cushion liner on the plate sleeve, and a special adhesive is applied on the surface. The adhesive coating can be repeatedly pasted on the plate, no longer using traditional Adhesive tape. The use of self-adhesive sleeves saves costs.
2. Seamless plate sleeve
The seamless plate sleeve is mainly composed of an inner layer, an intermediate layer and a surface layer. The inner layer of the sleeve is made of a special multi-layer glass fiber, which is light in weight and high in bending strength. The intermediate layer is composed of special urethane rubber, which has high elasticity and compressibility, which can increase the wall thickness of the sleeve and absorb the tensile deformation generated by the sleeve. The surface layer is coated with rubber or resin for laser engraving. The seamless plate sleeve allows for continuous lines, patterns or the same background color, such as wrapping paper, tipping paper, wallpaper, etc. When the seamless plate sleeve is not engraved, it can also be used for coating, full glazing, and the like.
3. The inner layer of the sleeve anilox roller is made of multi-layer glass fiber, the outer layer is made of compressible material and composite material, the surface is covered with metal aluminum shell, and the ceramic engraving is sprayed on the aluminum base. Mesh. The sleeve anilox roller and the plate sleeve are also fast, light and safe for quick replacement. Especially for wide-unit and satellite flexo presses, the sleeve anilox roller is not only the design of the machine factory. The problems that are faced, and more importantly, also bring great convenience to the actual operators.
Third, the advantages of using the sleeve technology summary
1.: The printing plate can be pre-installed, which greatly saves the plate changing time.
2. Safe and labor-saving: The weight is ultra-light, the loading and unloading is convenient, the manpower is saved, and the labor intensity is low.
3. High flexibility: able to meet the needs of individual production.
4. Convenient, low cost: installing a sleeve of different wall thickness on a gas-filled core can change the printing circumference.
5. High precision and long service life: Made of special materials and processes, high precision and long service life.
6. Space saving: it can be stored in three dimensions and saves the place.
In Europe and the United States, sleeve technology has been widely used in the field of flexo printing in the 1990s, especially for wide-format units and satellite flexo presses. Although some domestic manufacturers already have technical reserves in this area, because of the higher cost of use than the axial anilox roller and plate roller, there are very few manufacturers who actually use the sleeve technology, but with the flexo market The constant changes and the actual needs of customers, the processing capacity of domestic related suppliers continues to increase, and the application of sleeve technology in China has become a reality. In addition, the original flexo printing industry believes that the cost of using sleeve products is high, but few people know how high it is. Now, the localization of products such as sleeve anilox rolls has made the cost of using sleeve products much lower than before. This also paved the way for the adoption of sleeve technology in the domestic flexo industry. It can be said that with the introduction of the sleeve technology flexo printing machine by the northwestern Shaanxi, Xi'an Aerospace Huayang and Qingzhou Yigaofa, the Chinese flexo printing industry will have a great development. Now, we have reason to say that the application of sleeve technology has become the development trend of China's flexo printing.
The traditional shaft-type plate roller has low efficiency, and the loading and unloading plate is time-consuming, labor-intensive, poor in safety, inconvenient to store, poor in flexibility, non-standardized, and the like, and is incompatible with the development of modern flexo printing. The sleeve changing technology is fast, light and safe, and will promote the development of flexo printing towards high quality, high safety and high standardization. Shanghai Aokeli has been committed to the promotion of sleeve technology in China. After years of promotion, the domestic flexographic machinery factory and printing factory have adopted sleeve technology more and more. Qingzhou Yigaofa's wide-format compact flexo press has adopted the stud sleeve technology. This year is also a year in which the domestic flexographic machinery factory adopts sleeve technology. In October, the Shaanxi Northwest Sleeve Satellite Flexo Printing Machine was successfully launched. In December, the satellite flexo printing machine demonstration was successfully held in Xi’an Aerospace Huayang. The demonstration of its first sleeve satellite flexo press was also very successful. These manufacturers of sleeve-type anilox rolls and plated sleeves are supplied by Aucley and Flint. In the near future, a southern equipment manufacturer will introduce a sleeve-type satellite flexo press, and its sleeve product is also provided by Ao Ke Li. The development of domestic flexo to today, the gradual adoption of sleeve technology, has to be said to be a milestone in the development of China's flexo printing.
The application of sleeve technology in flexo printing includes sleeve type anilox roll (referred to as sleeve anilox roll), sleeve type plate roll (referred to as plate sleeve) and sleeve type plate (referred to as seamless plate) )Wait. The following is a description of the relevant knowledge and technical issues of the sleeve product.
First, the installation and removal of the sleeve
The sleeve is typically mounted on the gas lift core. The loading and unloading principle of the sleeve is shown in the figure. The gas rising core has an air inlet hole at one end, and some air holes are arranged on the surface, and the air inlet holes communicate with the air holes. When the compressed air is filled from the air inlet of the gas rising core, the compressed air is discharged from the air hole of the gas rising core. When the sleeve is installed toward the air rising core, it will be in the middle of the gas rising core surface and the inner wall of the sleeve. Forming a layer of air cushion, so that the inner diameter of the sleeve expands and expands on the air-lifting core, so that the sleeve can be arbitrarily moved back and forth on the air-up core. When the position is determined, the air source is cut off, and the sleeve can be tightly closed. The solid is no longer displaced on the gas core. Disassembling the sleeve is the same principle and procedure. The sleeve anilox roll, the plate sleeve, and the seamless plate sleeve are installed in the same principle.
Second, the structure and classification of the sleeve
The sleeve is made by winding technology and consists of three layers: basic sleeve, compressible layer and surface polymer (rubber, resin or metal aluminum). Each layer is wound on the surface of the mandrel and bonded with resin. Together.
The basic sleeve consists of glass fibers; the compressible layer consists of a special urethane rubber (a mixture of glass particles, glass fibers and resin); the surface layer consists mainly of a hard polymer coated with rubber or synthetic material, textured The surface layer of the roller sleeve is mainly composed of metal aluminum or nickel.
Plate sleeve
The plate sleeve is specially used for mounting the plate, and the plate is mounted on the plate sleeve with double-sided tape. The wall thickness of the sleeve can be arbitrarily selected from 1.5 to 100 mm, and the same inner diameter is installed on one gas-lifting core. The outer diameter (wall thickness) sleeve is used to achieve the various printing perimeters required. ROTEC MEGA sleeves have a wall thickness of 10 to 70 mm and a printing circumference of nearly 400 mm. In general, the wall thickness of the plated sleeve is preferably 25 mm. Because the thicker the sleeve wall, the higher the processing cost. In order to achieve a larger printing circumference, it is possible to save the use cost by replacing the larger diameter gas-lifting core and installing a thinner wall-thickening sleeve. The inner diameter of the sleeve is different from that of Figure 2 Rotec Sleeve Sleeve Table 1Rotec Sleeve Part Technical Data (Unit: mm) Sleeve Sleeve Air Outer Core/Diameter Error ±0.020±0.015 Large Standard Full Jump Error 0.0250.010 Large Cylindricity Error 0.0250.005 gas rise core diameter is less than 0.038mm.
According to the structure and function, the plate sleeve can be divided into a basic sleeve, a lightweight sleeve, an air cushion sleeve, a bridge sleeve and a self-adhesive sleeve.
(1) Basic sleeve
The basic sleeve is made of special multi-layer FRP fiber by winding technology and is mainly used for processing plate sleeves, jointless sleeves and sleeve anilox rolls.
(2) lightweight sleeve
The lightweight sleeve is a rigid sleeve designed for use with plain and foam-coated double-sided tape. The inner layer is a glass fiber reinforced basic sleeve, and the outer layer is a rigid polyurethane layer. The lightweight structure is suitable for the beating of all printing webs, and the wall thickness is 1 to 100 mm. Rotec's lightweight sleeve is blue, and the surface of the blue lightweight sleeve is a hard polymer that has been processed. It is very hard, has high hardness, impact resistance and cutting resistance. It needs to have the performance of foam cushion. The plated tape is attached to the sleeve.
(3) Air cushion sleeve
The air cushion sleeve is designed to match the thin printing plate. It is suitable for large-area solid printing. The surface is soft compressible material, which reduces the requirement for double-sided tape. It is the standard matching set for DuPont and Flint laser. cylinder. Rotec's air-cushion sleeves are black, and the black air-cushion sleeves are specifically designed for laser plate-making technology and high-quality thin plates. The surface material is an elastic, compressible polyurethane foam with excellent compression properties, and a thin adhesive tape (thickness 0.1 mm) with a high viscosity is used to paste the printing plate. The black air cushion sleeve surface not only has good toughness, high processing precision, but also has high compressibility and can absorb the vibration of the machine. The combination of the black air cushion sleeve and the thin printing plate, the dot enlargement is small, and the fine high-gloss dot can be realized, which is suitable for the printing of high quality and fine products. Other advantages of the black air cushion sleeve include: the ability to meet the requirements of both the ground and the high mesh point on one sleeve, and the printing effect is good; the wear on the printing plate is reduced, the service life of the printing plate is prolonged, and the resilience is high. Shock absorption performance, improve machine printing speed, high production efficiency; simple use of tape, conducive to the standardization of flexographic printing.
(4) Bridge sleeve
The bridge sleeve is suitable for the sleeve sleeve system, which can reduce the wall thickness of the sleeve, save the cost of making a thick sleeve, and simplify the assembly.
(5) Self-adhesive sleeve
The self-adhesive sleeve is a layer of air-cushion liner on the plate sleeve, and a special adhesive is applied on the surface. The adhesive coating can be repeatedly pasted on the plate, no longer using traditional Adhesive tape. The use of self-adhesive sleeves saves costs.
2. Seamless plate sleeve
The seamless plate sleeve is mainly composed of an inner layer, an intermediate layer and a surface layer. The inner layer of the sleeve is made of a special multi-layer glass fiber, which is light in weight and high in bending strength. The intermediate layer is composed of special urethane rubber, which has high elasticity and compressibility, which can increase the wall thickness of the sleeve and absorb the tensile deformation generated by the sleeve. The surface layer is coated with rubber or resin for laser engraving. The seamless plate sleeve allows for continuous lines, patterns or the same background color, such as wrapping paper, tipping paper, wallpaper, etc. When the seamless plate sleeve is not engraved, it can also be used for coating, full glazing, and the like.
3. The inner layer of the sleeve anilox roller is made of multi-layer glass fiber, the outer layer is made of compressible material and composite material, the surface is covered with metal aluminum shell, and the ceramic engraving is sprayed on the aluminum base. Mesh. The sleeve anilox roller and the plate sleeve are also fast, light and safe for quick replacement. Especially for wide-unit and satellite flexo presses, the sleeve anilox roller is not only the design of the machine factory. The problems that are faced, and more importantly, also bring great convenience to the actual operators.
Third, the advantages of using the sleeve technology summary
1.: The printing plate can be pre-installed, which greatly saves the plate changing time.
2. Safe and labor-saving: The weight is ultra-light, the loading and unloading is convenient, the manpower is saved, and the labor intensity is low.
3. High flexibility: able to meet the needs of individual production.
4. Convenient, low cost: installing a sleeve of different wall thickness on a gas-filled core can change the printing circumference.
5. High precision and long service life: Made of special materials and processes, high precision and long service life.
6. Space saving: it can be stored in three dimensions and saves the place.
In Europe and the United States, sleeve technology has been widely used in the field of flexo printing in the 1990s, especially for wide-format units and satellite flexo presses. Although some domestic manufacturers already have technical reserves in this area, because of the higher cost of use than the axial anilox roller and plate roller, there are very few manufacturers who actually use the sleeve technology, but with the flexo market The constant changes and the actual needs of customers, the processing capacity of domestic related suppliers continues to increase, and the application of sleeve technology in China has become a reality. In addition, the original flexo printing industry believes that the cost of using sleeve products is high, but few people know how high it is. Now, the localization of products such as sleeve anilox rolls has made the cost of using sleeve products much lower than before. This also paved the way for the adoption of sleeve technology in the domestic flexo industry. It can be said that with the introduction of the sleeve technology flexo printing machine by the northwestern Shaanxi, Xi'an Aerospace Huayang and Qingzhou Yigaofa, the Chinese flexo printing industry will have a great development. Now, we have reason to say that the application of sleeve technology has become the development trend of China's flexo printing.
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