I. Mechanical Structure (Performance) and Automation The importance of the paper feeders of modern sheet-fed multi-color offset presses with a speed of over 15000 rpm is self-evident. First of all, it should be able to steadily and reliably separate and transfer printing materials of different materials, widths, and thicknesses (such as paper, cardboard, plastic cards, and plastic film bases of different weights) one by one; Paper stack front-end detection, phase and skew correction and edge gauge adjustment device, for this reason, manufacturers have commonly used high-performance paper feeders produced by themselves.
Up to now, several production plants have used vacuum suction belts for speed transfer, and pneumatic side pulling gauges for precise positioning, especially for commonly used paper media, but additional equipment is required for cardboard, composite materials, etc. Such as KBA's auxiliary press guide device is very suitable for the delivery of thick paper.
To prevent double-sheet, empty-sheet, skew, and Other paper feed failures, many manufacturers have adopted optoelectronic and capacitive control technologies, while KBA has adopted ultrasonic technology as a control method on some models. This is a problem for some paper failures that are difficult to distinguish, such as Thick paper, special printing materials, and a thick ink print are very advantageous.
As a founding member of the double roller press and transfer roller transfer method, Planeta, one of KBA’s predecessor companies, used this low-curvature technology for sheetfed multi-color offset printing as early as 30 years ago. The company's machine-type multi-color machine, and now, this approach has been respected by many manufacturers to accept and evolve some other forms.
For modern sheet-fed multicolor offset presses, the transfer rollers, whether they are double or triple, have a large effect on the grippers, such as the double-diameter transfer roller of KAB. The two rows of fangs are treated with the "cat claw" function, which eliminates the need for the adjustment of the squeezing row for the transfer of thick paper during the printing process.
In addition, the installation of the blowing and suction device of the air-suspension type paper guide system, which cooperates with the transfer roller, is also a great mystery. This is particularly important in the printing of thick cardboard and ultra-thin paper.
Of course, the transfer roller has the function of rapid overprinting for modern offset printing. It can be used as a correction for the positional deviation adjustment of the printing plate, rather than a traditional one. The long-term damage of accuracy has played an active role in the rapid response of overprinting, the saving of paper, and the protection of machine precision.
At present, only two or three production plants have this function. Several leading manufacturers of offset press production technology have their own characteristics in the design of some printing and water supply devices, but most of them adopt the multi-ink roller dual ink channel ink layout, except that KBA adopts 5 on several main models. Root inking systems with different diameters depending on the printing roller. The features of the ink roller are as few as 15 rollers. The roller diameter is large. The first roller is connected to the water supply and wetting device to make the ink and the roller act as the pre-emulsification of the ink, which can shorten the ink ink balance time and change the printing ink color. Make a quick response, reduce paper waste and cleaning time.
KBA's water supply and wetting device is also characterized by straight-line water transfer, which is characterized by a continuous film-type water supply by means of a rubber-impregnated water roller and a chrome-plated water transfer roller. This simple and quick water supply can be used for low alcohol or alcohol-free fountain solutions without modification.
In addition, the constant temperature system of the inking device should also be the standard configuration of today's offset press, because it can further improve the stability of the long live printing process, and can also do waterless offset printing to meet the development needs of future offset printing technology.
Second, auxiliary functions and other modern offset printing press in addition to online polishing, drying function, there are a variety of online functions can increase production efficiency, shorten the printing cycle, save manpower expenses, reduce the intermediate storage. For example, a web cut sheet unit with longitudinal and lateral cutting blades can be used for printing and punching holes for 4+4 color mail advertisements and newspaper supplements, numbering mechanism, color printing apparatus, non-stop delivery, etc. .
15,000 rpm is an ideal rotational speed in modern offset press production operations. At present, all manufacturers are trying to find out how to use this press to better realize the overall benefits of the press, instead of simply increasing the speed of printing.
The full sheet machine is a giant in sheet-fed multi-color offset printing machines. At present, only a few manufacturing plants in the world are producing, and only 1200 mm×1620 mm specifications can be produced by the KBA. The market demand for full-length machines is a long-term existence, and this demand is growing both in the fields of commercial publishing and packaging and printing. The range of printed materials is also quite extensive, including paper, cardboard, and corrugated paper. High-precision prints.
Satisfying the ergonomic requirements, focusing on the protection of the environment, and modern and future offset presses should be the key considerations. Because the offset ink, alcohol, dusting, ultraviolet light, noise, etc. have a considerable impact on the operator's physical and mental health, and environmental protection. KBA took the lead in this step. At present, the 105 machines have won the honor of the world's first green machine and are named "ECOPRESS 2000".
Up to now, several production plants have used vacuum suction belts for speed transfer, and pneumatic side pulling gauges for precise positioning, especially for commonly used paper media, but additional equipment is required for cardboard, composite materials, etc. Such as KBA's auxiliary press guide device is very suitable for the delivery of thick paper.
To prevent double-sheet, empty-sheet, skew, and Other paper feed failures, many manufacturers have adopted optoelectronic and capacitive control technologies, while KBA has adopted ultrasonic technology as a control method on some models. This is a problem for some paper failures that are difficult to distinguish, such as Thick paper, special printing materials, and a thick ink print are very advantageous.
As a founding member of the double roller press and transfer roller transfer method, Planeta, one of KBA’s predecessor companies, used this low-curvature technology for sheetfed multi-color offset printing as early as 30 years ago. The company's machine-type multi-color machine, and now, this approach has been respected by many manufacturers to accept and evolve some other forms.
For modern sheet-fed multicolor offset presses, the transfer rollers, whether they are double or triple, have a large effect on the grippers, such as the double-diameter transfer roller of KAB. The two rows of fangs are treated with the "cat claw" function, which eliminates the need for the adjustment of the squeezing row for the transfer of thick paper during the printing process.
In addition, the installation of the blowing and suction device of the air-suspension type paper guide system, which cooperates with the transfer roller, is also a great mystery. This is particularly important in the printing of thick cardboard and ultra-thin paper.
Of course, the transfer roller has the function of rapid overprinting for modern offset printing. It can be used as a correction for the positional deviation adjustment of the printing plate, rather than a traditional one. The long-term damage of accuracy has played an active role in the rapid response of overprinting, the saving of paper, and the protection of machine precision.
At present, only two or three production plants have this function. Several leading manufacturers of offset press production technology have their own characteristics in the design of some printing and water supply devices, but most of them adopt the multi-ink roller dual ink channel ink layout, except that KBA adopts 5 on several main models. Root inking systems with different diameters depending on the printing roller. The features of the ink roller are as few as 15 rollers. The roller diameter is large. The first roller is connected to the water supply and wetting device to make the ink and the roller act as the pre-emulsification of the ink, which can shorten the ink ink balance time and change the printing ink color. Make a quick response, reduce paper waste and cleaning time.
KBA's water supply and wetting device is also characterized by straight-line water transfer, which is characterized by a continuous film-type water supply by means of a rubber-impregnated water roller and a chrome-plated water transfer roller. This simple and quick water supply can be used for low alcohol or alcohol-free fountain solutions without modification.
In addition, the constant temperature system of the inking device should also be the standard configuration of today's offset press, because it can further improve the stability of the long live printing process, and can also do waterless offset printing to meet the development needs of future offset printing technology.
Second, auxiliary functions and other modern offset printing press in addition to online polishing, drying function, there are a variety of online functions can increase production efficiency, shorten the printing cycle, save manpower expenses, reduce the intermediate storage. For example, a web cut sheet unit with longitudinal and lateral cutting blades can be used for printing and punching holes for 4+4 color mail advertisements and newspaper supplements, numbering mechanism, color printing apparatus, non-stop delivery, etc. .
15,000 rpm is an ideal rotational speed in modern offset press production operations. At present, all manufacturers are trying to find out how to use this press to better realize the overall benefits of the press, instead of simply increasing the speed of printing.
The full sheet machine is a giant in sheet-fed multi-color offset printing machines. At present, only a few manufacturing plants in the world are producing, and only 1200 mm×1620 mm specifications can be produced by the KBA. The market demand for full-length machines is a long-term existence, and this demand is growing both in the fields of commercial publishing and packaging and printing. The range of printed materials is also quite extensive, including paper, cardboard, and corrugated paper. High-precision prints.
Satisfying the ergonomic requirements, focusing on the protection of the environment, and modern and future offset presses should be the key considerations. Because the offset ink, alcohol, dusting, ultraviolet light, noise, etc. have a considerable impact on the operator's physical and mental health, and environmental protection. KBA took the lead in this step. At present, the 105 machines have won the honor of the world's first green machine and are named "ECOPRESS 2000".
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