Technical Features and Development Trends of Foreign Sheetfed Offset Presses
2023-12-31 10:07:35
In recent years, with the rapid development of printing technology and equipment, the famous international printing exhibition has attracted much attention, from 1999 GAS in Japan to PRUPA in Germany in 2000 to CHINA 2001 in China this year. Every printing exhibition provides us with the pulse of the development of touch printing technology and equipment and looks forward to the development of printing. From the technical characteristics and development direction of international brand-name offset printing presses recently, it is not difficult for us to see the general trend of development of offset printing equipment.
I. Technical characteristics and development direction of internationally renowned sheet-fed offset printing equipment
After several years of development, offset printing has become a more mature printing technology. With its good printing quality, wide application range, convenient plate making, and low cost of consumables, it has become the first choice for printing methods in all countries in the world today. In order to meet people's constant pursuit of high-quality printed materials, the printing industry is also continuously developing offset printing equipment that is compatible with this type of printing technology. At present, the famous overseas offset printing equipment manufacturers mainly include: Heidelberg (Germany), MAN ROLAND, KBA (Japan); KOMORI (Japan) and Mitsubishi (MITSUBISHI).
From the international printing exhibition in recent years, we can see that sheet-fed offset printing equipment is still the protagonist of the printing stage. With the continuous development of computer technology, optical fiber transmission technology, and digital and network technologies, and people’s increasing demands on the quality of printed matter, printing production efficiency, automation, and environmental protection, there are more and more new ideas and technologies. The introduction of new institutions into the production of printing equipment has greatly promoted the significant increase in the printing precision of offset presses, and at the same time brought about the maturity of control technology and the improvement of intelligent management. Although no fundamental changes have taken place in the mechanical structure of the offset press, the famous foreign printing equipment manufacturers have transformed and innovated the printing equipment of their famous brands, shortening the auxiliary time, increasing the degree of automation, and reducing the scrap rate. Make a fuss to meet the needs of the market for multi-variety, multi-color, and small-volume prints. From the development of the printing equipment market in recent years, the latest printing presses generally have the following characteristics:
(1) Automatic response control: When the specification and size of the paper are set, automatic adjustment such as roller pressure, side gauge, flush paper, ink supply, and powder spray can be performed automatically.
(2)Automatically or semi-automatically: It can use the plate box that can hold a certain number of printing plates, and it can be plated and unloaded by the automatic control system without any manual intervention; or by manually placing the predetermined position of the printing plate, which is automatically loaded by the plate. Institution loading or printing plate.
(3) Automatic cleaning of the blanket cylinder and the impression cylinder: The automatic cleaning system can also be automatically controlled. The cleaning time, the amount of the cleaning fluid, etc., can be preset on the operation table.
(4) Fully-integrated color control panel: In the control function with high human-machine dialogue function and color touch display, it can be easily preset, set, adjusted and recorded.
The technical features of several internationally famous sheetfed offset presses will be introduced below. From this we can easily see the current status and development direction of the printing equipment market.
1. Heidelberg press technology development and trends
Heidelberg single sheet lithography equipment is mainly divided into "SPEEDMASTER" series, "QUICKMASTER"
Series and PRINTMASTER series. "Speedmaster" offset press is Heidelberg's leading product, with more mature technology, high printing quality, fast printing speed, high degree of automation, mainly in the off, four boot type. The "Family" offset press has the characteristics of high printing flexibility, fast printing speed, and high degree of automation, and it is developing in the direction of the mechanism version, mainly based on the following models. “India†is the newer model that Heidelberg has introduced to meet the requirements of the mid-range printing market in order to reduce costs. It combines the mature concepts of SM offset printing with the basic concepts of economic printing, with higher print quality and lower operating costs. Outstanding features.
Heidelberg offset press adopts step-type standard paper feeding (for starting) or vacuum suction belt feeding (four- and eight-start). The standard paper feeder has a stable structure and can be applied to various printing materials. Printing and suction belt feeding make the operation and adjustment quick and easy; the rising of the paper table adopts a stepless method, which can change the rising height for the actual thickness of the paper to keep the relative position of the nozzle and the paper stack stable; Feeding paper teeth can ensure that the paper delivery mechanism is simple and easy to adjust; the roller arrangement uses the “seven o'clock†method for printing machines with double-diameter impression cylinders, which can meet the drum arrangement requirements, facilitate the transfer of paper, and is conducive to printing quality. It is especially suitable for the printing of printing materials for cardboards. The ink system uses 21 ink roller arrangements to meet the principle of "light weight before and after weight" and can realize quick reaction of ink flow; the dampening system consists of 5 The composition of the water roller, the water fountain roller and the ink fountain roller are similar to the zoning treatment, and an array of axially adjustable blowing fans is used to evaporate the excess fountain solution. The dampening device has an automatic speed compensation function, which can realize fast ink and ink balance and maintain the water supply stability when the printing speed changes; the paper delivery device uses the air blowing paper guide, the double-increase powder spraying device can make the paper basket smooth and neat, and can also save 30. % of dusting.
In addition, Heidelberg is also working hard to enhance the automation of presses. From the most CPC ink remote control and registration system, CPTRONIC printing press integrated control system to CP2000 printing press automatic control system, has realized the printing quality automatic monitoring and the control. Through the configuration of a fully digital electronic display system, integrated operation and management can also be realized, which can achieve better product quality, shorter print preparation time, fewer press maintenance, and higher output of printed products. In order to meet the increasing demand for on-demand printing, Heidelberg also introduced the GTO52 compact multi-function offset printing. In addition to the basic printing job requirements, it can also be equipped with gloss, numbering, tying lines, die cutting, and flipping. This kind of function has greater flexibility in printing and finishing.
With the subdivision of the printing market and the constant pursuit of high quality and high economic efficiency, Heidelberg has positioned itself for the development of printing solutions. In order to meet market requirements, seven sets of printing solutions have been introduced: Business Rotary Printing Solutions, Express Printing Solutions, Digital Printing Solutions, and Prepress Solutions.
2. Manroland press technology trends
Roland sheet-fed lithographic printing presses are mainly divided into large-format Roland 900 sheet-fed printing machines, Roland 700 with excellent open format, four-opening machines, and Roland 500, Roland 300, and Roland 200.
Roland 700 standard printer adopts hem type front sway and hem type delivery paper teeth, so that the paper is conveyed smoothly and accurately. The double-diameter impression cylinder reduces the number of paper hand-overs between multi-color units and greatly reduces the paper transfer error. And can make the surface of the printing product smooth, reduce the dot distortion when printing; use "7 o'clock" roller arrangement, can make the printing paper through the rubber roller after stamping and transfer to the transfer roller, reducing the printing due to the tail of the printed sheet During the process, the change of dots and overprint problems brought about by the paper transfer; the ink supply system uses a fast-response ink system with only 16 ink rollers, the ink supply method adopts the central ink supply method, and the main ink roller is automatically classified. The "adjustment" and "ink chain auto-separation" functions have the characteristics of large ink roller diameter, good heat dissipation performance, and high-speed printing; the wetting system uses the Roland Deltanmatic triangle wine lush version system to eliminate "ghost" and reduce " White spot "has a good effect; the use of a "character type" transfer device without a barrel belly can prevent contact and smudging of printed sheets, and can also eliminate the need for retrofitting. Dirty mesh, the operation is very convenient, help to reduce the loss of printed products; diagonal registration of the printing plate, can be used to automatically adjust the eccentricity of the transfer device, without having to adjust the eccentricity of the plate cylinder, thus reducing the overprinting paper Waste, overcomes the deviation of the parallelism caused by the eccentric adjustment of the plate cylinder on the blanket cylinder and the plate roller.
The use of a large number of pneumatic control systems instead of traditional mechanical devices is a major feature of manroland presses. It uses vacuum paper feeders, variable speed suction belts and pneumatic side pull gauges, which greatly reduces the complex mechanical structure and reduces the mechanical manufacturing and installation. The difficulty of debugging. The left and right positions of the paper stack and the position of the paper feeding machine can be accurately controlled by the position switch, thereby ensuring that the overprint position of the double-sided printing is accurate. In order to improve the automation of sheet-fed multicolor offset presses, improve printing quality, and reduce labor intensity, Manroland has adopted the PECOM control system for electronic printing control and pre-setting. In the pre-press job preparation, by inputting the paper thickness and other data into the console, the front and rear height and position of the feeder head, the front gauge, the side gauge, the delivery vacuum suction wheel, and the powder spraying device can be accurately and accurately completed. The precise and rapid pre-adjustment of printing pressure, etc., reduces preparation and downtime and improves production efficiency. Manroland not only continues to forge ahead in the development of traditional offset printing equipment, but also has achieved something in digital printing. It can be seen from its independently developed DICO Web web digital offset press that Manroland combines traditional offset printing technology with modern digital printing. Combining organically opens up a path for the modern development of offset printing technology.
3. Technical Development and Trends of Kobao Presses
At present, the main products of KBA in the market are KBA105 and KBA74, whose predecessors were KBA104 and KBA72 respectively. On the DRUPA 2000, KBA launched a new model of the KBA105. Until now, the KBA105 is still the flagship product of the KBA.
KBA105 has a very high print speed of 21,000 sheets/hour design speed, in addition to the current popular hem-type delivery paper, hem type front gauge, double-diameter impression cylinder, air-cushion transfer 1, paper table automatic centering, pneumatic delivery device outside , Also created a "four mention six to send" to the machine feeder, blowing, suction nozzle can be adjusted electronically, making adjustments faster and more convenient, more stable and accurate feeding; using vacuum feeding, can achieve four-phase transmission Paper, four air chambers can ensure that the suction pressure near the end of the feed table is large, the air pressure near the front gauge end is zero, and the speed change required for the paper transfer is realized; the pneumatic side pull gauge can achieve accurate positioning, and the photoelectricity is used to pull the paper Insufficient problem; Ultrasonic double-sheet detection device is very advantageous for thick paper, special printing materials, and inks with thick colors; Inking device is a single ink inking system with five different diameters, and the ink roller can be pumped. To move, to eliminate "ghosting", a small number of ink rollers (15), a large diameter, can achieve rapid conversion of printing ink, reducing paper waste and cleaning time; wetting device using linear water transfer, can be Used for normal wetting and alcohol wetting; transfer and impression rollers use "anchor claw" type teeth, which eliminates the need to adjust the work of the teeth during the conversion of thick and thin paper during printing; the upper version can be fully automated. The upper version (with delivery, collection box) or the automatic version (with version of the box), reduces the downtime auxiliary time and improves the production efficiency; the transfer roller can be used for diagonal register adjustment without the need for printing plates The unilateral deflection of the roller ensures the running accuracy of the printing press.
In order to increase the stability of the machine operation, improve the running accuracy and ensure the printing quality, KBA105 also uses the lower body integrated casting, T-type wall plate installation, which reduces the machine vibration and solves the problem of oil leakage.
KBA74 and KBA105 are similar in terms of configuration and control, but they are different in the printing format, delivery, side gauge and ink path. The KBA Rapid 162A produced by the company is a rare super large-format (1200mm×1620mm) full-sheet offset press that can meet the special needs of commercial publishing and packaging printing.
Meeting the needs of ergonomics and focusing on environmental protection have become KBA's strategy for developing modern and future offset printing. The developed printing equipment is easy to operate, easy to maintain, and minimizes the influence of ink, alcohol, dusting, ultraviolet light, and noise on the operator's health and environment in offset printing. This has become the development direction of KBA.
4. Komori's Technology Development and Trends
Komori Corporation Japan is famous for producing sheet-fed lithographic printing presses. Its main products include Lithrone 26, 28, 40 (L-640, L-440) and other four-opening, off-set offset printing presses, and Lithrone 26P with flip function. 28P single sheet
I. Technical characteristics and development direction of internationally renowned sheet-fed offset printing equipment
After several years of development, offset printing has become a more mature printing technology. With its good printing quality, wide application range, convenient plate making, and low cost of consumables, it has become the first choice for printing methods in all countries in the world today. In order to meet people's constant pursuit of high-quality printed materials, the printing industry is also continuously developing offset printing equipment that is compatible with this type of printing technology. At present, the famous overseas offset printing equipment manufacturers mainly include: Heidelberg (Germany), MAN ROLAND, KBA (Japan); KOMORI (Japan) and Mitsubishi (MITSUBISHI).
From the international printing exhibition in recent years, we can see that sheet-fed offset printing equipment is still the protagonist of the printing stage. With the continuous development of computer technology, optical fiber transmission technology, and digital and network technologies, and people’s increasing demands on the quality of printed matter, printing production efficiency, automation, and environmental protection, there are more and more new ideas and technologies. The introduction of new institutions into the production of printing equipment has greatly promoted the significant increase in the printing precision of offset presses, and at the same time brought about the maturity of control technology and the improvement of intelligent management. Although no fundamental changes have taken place in the mechanical structure of the offset press, the famous foreign printing equipment manufacturers have transformed and innovated the printing equipment of their famous brands, shortening the auxiliary time, increasing the degree of automation, and reducing the scrap rate. Make a fuss to meet the needs of the market for multi-variety, multi-color, and small-volume prints. From the development of the printing equipment market in recent years, the latest printing presses generally have the following characteristics:
(1) Automatic response control: When the specification and size of the paper are set, automatic adjustment such as roller pressure, side gauge, flush paper, ink supply, and powder spray can be performed automatically.
(2)Automatically or semi-automatically: It can use the plate box that can hold a certain number of printing plates, and it can be plated and unloaded by the automatic control system without any manual intervention; or by manually placing the predetermined position of the printing plate, which is automatically loaded by the plate. Institution loading or printing plate.
(3) Automatic cleaning of the blanket cylinder and the impression cylinder: The automatic cleaning system can also be automatically controlled. The cleaning time, the amount of the cleaning fluid, etc., can be preset on the operation table.
(4) Fully-integrated color control panel: In the control function with high human-machine dialogue function and color touch display, it can be easily preset, set, adjusted and recorded.
The technical features of several internationally famous sheetfed offset presses will be introduced below. From this we can easily see the current status and development direction of the printing equipment market.
1. Heidelberg press technology development and trends
Heidelberg single sheet lithography equipment is mainly divided into "SPEEDMASTER" series, "QUICKMASTER"
Series and PRINTMASTER series. "Speedmaster" offset press is Heidelberg's leading product, with more mature technology, high printing quality, fast printing speed, high degree of automation, mainly in the off, four boot type. The "Family" offset press has the characteristics of high printing flexibility, fast printing speed, and high degree of automation, and it is developing in the direction of the mechanism version, mainly based on the following models. “India†is the newer model that Heidelberg has introduced to meet the requirements of the mid-range printing market in order to reduce costs. It combines the mature concepts of SM offset printing with the basic concepts of economic printing, with higher print quality and lower operating costs. Outstanding features.
Heidelberg offset press adopts step-type standard paper feeding (for starting) or vacuum suction belt feeding (four- and eight-start). The standard paper feeder has a stable structure and can be applied to various printing materials. Printing and suction belt feeding make the operation and adjustment quick and easy; the rising of the paper table adopts a stepless method, which can change the rising height for the actual thickness of the paper to keep the relative position of the nozzle and the paper stack stable; Feeding paper teeth can ensure that the paper delivery mechanism is simple and easy to adjust; the roller arrangement uses the “seven o'clock†method for printing machines with double-diameter impression cylinders, which can meet the drum arrangement requirements, facilitate the transfer of paper, and is conducive to printing quality. It is especially suitable for the printing of printing materials for cardboards. The ink system uses 21 ink roller arrangements to meet the principle of "light weight before and after weight" and can realize quick reaction of ink flow; the dampening system consists of 5 The composition of the water roller, the water fountain roller and the ink fountain roller are similar to the zoning treatment, and an array of axially adjustable blowing fans is used to evaporate the excess fountain solution. The dampening device has an automatic speed compensation function, which can realize fast ink and ink balance and maintain the water supply stability when the printing speed changes; the paper delivery device uses the air blowing paper guide, the double-increase powder spraying device can make the paper basket smooth and neat, and can also save 30. % of dusting.
In addition, Heidelberg is also working hard to enhance the automation of presses. From the most CPC ink remote control and registration system, CPTRONIC printing press integrated control system to CP2000 printing press automatic control system, has realized the printing quality automatic monitoring and the control. Through the configuration of a fully digital electronic display system, integrated operation and management can also be realized, which can achieve better product quality, shorter print preparation time, fewer press maintenance, and higher output of printed products. In order to meet the increasing demand for on-demand printing, Heidelberg also introduced the GTO52 compact multi-function offset printing. In addition to the basic printing job requirements, it can also be equipped with gloss, numbering, tying lines, die cutting, and flipping. This kind of function has greater flexibility in printing and finishing.
With the subdivision of the printing market and the constant pursuit of high quality and high economic efficiency, Heidelberg has positioned itself for the development of printing solutions. In order to meet market requirements, seven sets of printing solutions have been introduced: Business Rotary Printing Solutions, Express Printing Solutions, Digital Printing Solutions, and Prepress Solutions.
2. Manroland press technology trends
Roland sheet-fed lithographic printing presses are mainly divided into large-format Roland 900 sheet-fed printing machines, Roland 700 with excellent open format, four-opening machines, and Roland 500, Roland 300, and Roland 200.
Roland 700 standard printer adopts hem type front sway and hem type delivery paper teeth, so that the paper is conveyed smoothly and accurately. The double-diameter impression cylinder reduces the number of paper hand-overs between multi-color units and greatly reduces the paper transfer error. And can make the surface of the printing product smooth, reduce the dot distortion when printing; use "7 o'clock" roller arrangement, can make the printing paper through the rubber roller after stamping and transfer to the transfer roller, reducing the printing due to the tail of the printed sheet During the process, the change of dots and overprint problems brought about by the paper transfer; the ink supply system uses a fast-response ink system with only 16 ink rollers, the ink supply method adopts the central ink supply method, and the main ink roller is automatically classified. The "adjustment" and "ink chain auto-separation" functions have the characteristics of large ink roller diameter, good heat dissipation performance, and high-speed printing; the wetting system uses the Roland Deltanmatic triangle wine lush version system to eliminate "ghost" and reduce " White spot "has a good effect; the use of a "character type" transfer device without a barrel belly can prevent contact and smudging of printed sheets, and can also eliminate the need for retrofitting. Dirty mesh, the operation is very convenient, help to reduce the loss of printed products; diagonal registration of the printing plate, can be used to automatically adjust the eccentricity of the transfer device, without having to adjust the eccentricity of the plate cylinder, thus reducing the overprinting paper Waste, overcomes the deviation of the parallelism caused by the eccentric adjustment of the plate cylinder on the blanket cylinder and the plate roller.
The use of a large number of pneumatic control systems instead of traditional mechanical devices is a major feature of manroland presses. It uses vacuum paper feeders, variable speed suction belts and pneumatic side pull gauges, which greatly reduces the complex mechanical structure and reduces the mechanical manufacturing and installation. The difficulty of debugging. The left and right positions of the paper stack and the position of the paper feeding machine can be accurately controlled by the position switch, thereby ensuring that the overprint position of the double-sided printing is accurate. In order to improve the automation of sheet-fed multicolor offset presses, improve printing quality, and reduce labor intensity, Manroland has adopted the PECOM control system for electronic printing control and pre-setting. In the pre-press job preparation, by inputting the paper thickness and other data into the console, the front and rear height and position of the feeder head, the front gauge, the side gauge, the delivery vacuum suction wheel, and the powder spraying device can be accurately and accurately completed. The precise and rapid pre-adjustment of printing pressure, etc., reduces preparation and downtime and improves production efficiency. Manroland not only continues to forge ahead in the development of traditional offset printing equipment, but also has achieved something in digital printing. It can be seen from its independently developed DICO Web web digital offset press that Manroland combines traditional offset printing technology with modern digital printing. Combining organically opens up a path for the modern development of offset printing technology.
3. Technical Development and Trends of Kobao Presses
At present, the main products of KBA in the market are KBA105 and KBA74, whose predecessors were KBA104 and KBA72 respectively. On the DRUPA 2000, KBA launched a new model of the KBA105. Until now, the KBA105 is still the flagship product of the KBA.
KBA105 has a very high print speed of 21,000 sheets/hour design speed, in addition to the current popular hem-type delivery paper, hem type front gauge, double-diameter impression cylinder, air-cushion transfer 1, paper table automatic centering, pneumatic delivery device outside , Also created a "four mention six to send" to the machine feeder, blowing, suction nozzle can be adjusted electronically, making adjustments faster and more convenient, more stable and accurate feeding; using vacuum feeding, can achieve four-phase transmission Paper, four air chambers can ensure that the suction pressure near the end of the feed table is large, the air pressure near the front gauge end is zero, and the speed change required for the paper transfer is realized; the pneumatic side pull gauge can achieve accurate positioning, and the photoelectricity is used to pull the paper Insufficient problem; Ultrasonic double-sheet detection device is very advantageous for thick paper, special printing materials, and inks with thick colors; Inking device is a single ink inking system with five different diameters, and the ink roller can be pumped. To move, to eliminate "ghosting", a small number of ink rollers (15), a large diameter, can achieve rapid conversion of printing ink, reducing paper waste and cleaning time; wetting device using linear water transfer, can be Used for normal wetting and alcohol wetting; transfer and impression rollers use "anchor claw" type teeth, which eliminates the need to adjust the work of the teeth during the conversion of thick and thin paper during printing; the upper version can be fully automated. The upper version (with delivery, collection box) or the automatic version (with version of the box), reduces the downtime auxiliary time and improves the production efficiency; the transfer roller can be used for diagonal register adjustment without the need for printing plates The unilateral deflection of the roller ensures the running accuracy of the printing press.
In order to increase the stability of the machine operation, improve the running accuracy and ensure the printing quality, KBA105 also uses the lower body integrated casting, T-type wall plate installation, which reduces the machine vibration and solves the problem of oil leakage.
KBA74 and KBA105 are similar in terms of configuration and control, but they are different in the printing format, delivery, side gauge and ink path. The KBA Rapid 162A produced by the company is a rare super large-format (1200mm×1620mm) full-sheet offset press that can meet the special needs of commercial publishing and packaging printing.
Meeting the needs of ergonomics and focusing on environmental protection have become KBA's strategy for developing modern and future offset printing. The developed printing equipment is easy to operate, easy to maintain, and minimizes the influence of ink, alcohol, dusting, ultraviolet light, and noise on the operator's health and environment in offset printing. This has become the development direction of KBA.
4. Komori's Technology Development and Trends
Komori Corporation Japan is famous for producing sheet-fed lithographic printing presses. Its main products include Lithrone 26, 28, 40 (L-640, L-440) and other four-opening, off-set offset printing presses, and Lithrone 26P with flip function. 28P single sheet
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