1. Quick operation and easy adjustment
1. Shaftless transmission technology
The shaftless transmission technology is used to realize the synchronous control of the printing unit and the paper conveyor, and complete the control of the four high-precision servo motors on the paper conveyor, respectively controlling the separation nozzle and the delivery nozzle of the separation head, the conveyor belt and the front The regulation of the paper tongue, as well as the movement of the main and auxiliary paper feed tables, greatly improves the accuracy and stability of the system movement, and effectively reduces auxiliary time and energy consumption. Shaftless transmission technology paper machine can separate substrates from thin paper to thick cardboard, corrugated cardboard, plastic sheet and so on without replacing any parts. Manroland, Heidelberg, KBA and other high-end sheet-fed offset presses have adopted shaftless transmission technology.
2. No side gauge technology
The sideless technology applied to KBA Rapida 105 is to place the side position on the paper transfer link to win time for the previous position and ensure that the paper has sufficient positioning time and positioning accuracy. It is one of the sheet-fed offset presses. A unique positioning system. The sideless positioning system refers to the monitoring of the position of the paper by the photoelectric sensors installed on both sides of the paper conveying table before the paper reaches the front regulation, and the information is fed back to the central controller, and then transmitted to the control of the delivery roller Servo motor of the tooth row completes the lateral positioning of the tooth row. Because there is no side gauge, the operator does not need to do any side gauge adjustment, which can effectively reduce the preparation time of the machine by 25%.
3. Paper corresponding adjustment device
Input the paper thickness and other data to the console before printing, the paper table can be automatically raised, the paper table is automatically centered, and the position of the electric nozzle can be adjusted quickly and accurately. After setting the paper size, the system can automatically adjust the paper alignment, roller pressure, rules, ink supply, paper delivery, powder spraying, etc. Paper dynamic calibration means that the paper is skewed during the paper feeding process, and it is automatically adjusted during the movement to ensure that the paper is accurately positioned when it reaches the regulatory component.
4. Paper feeding and receiving without stopping
In order to reduce the time to replace the paper stack and improve the efficiency of the machine, the high-speed offset press is equipped with a non-stop paper feeding and receiving device. KBA recently introduced automatic non-stop paper feeding, which has further improved production efficiency.
5. Follow-up pressure regulating mechanism
In the printing pressure adjustment link, when the printing pressure between the rubber cylinder and the impression cylinder is adjusted, the pressure adjustment mechanism between the rubber cylinder and the plate cylinder moves accordingly, and the adjustment is convenient and efficient.
When the diagonal registration of the printing plate is adjusted by the axial deflection of the printing plate cylinder, the follow-up pressure adjustment mechanism can be used to realize the parallel plate deviation for the parallelism deviation generated by the rubber cylinder, the form ink roller and the water roller The axes of the ink roller and the water roller change with the change of the axis of the plate cylinder to ensure that the pressure between the plate cylinder and the plate ink roller and the water roller is constant.
6. Console operation
The fully integrated color control panel has a highly man-machine dialogue function, which can easily preset, adjust and record parameters. As long as the operator clicks on the touch screen, the man-machine dialogue can be conducted.
2. Optimization of the stable structure of the organization
1. Conjugate cam mechanism
The conjugate cam mechanism is a closed cam mechanism that does not require a return spring to keep the follower and cam in constant contact. In theory, there can be no resonance. The running speed of the specific closed cam is higher, but in manufacturing It is more complicated and expensive to close the cam mechanism. At present, some mechanisms of printing equipment are driven by conjugated cam mechanisms, such as the hem-down paper delivery mechanism of the printing press, the hem-type front gauge and the paper suction nozzle mechanism, thereby increasing the paper's paper stabilization time, improving the paper's positioning accuracy and overprinting accuracy The mechanism moves smoothly.
2. Shock absorption and noise reduction mechanism
Many devices and mechanisms are used in the printing process to ensure smooth operation and reduce vibration and noise. For example, the buffer device and the rubber cylinder damping mechanism in the clutch pressure process can reduce vibration and make the printing machine run smoothly. The gripping shaft adopts a paper transfer non-impact system, that is, the gripping opening and closing mechanism of the impression cylinder and the transfer cylinder is driven by a conjugate cam method, and the left and right gripping teeth are opened and closed synchronously during paper transfer to ensure smooth paper transfer and prevent fan tails , To improve the registration accuracy and ensure the stability of the paper feed in high-speed operation. Optimizing the layout of the chain guide is also a measure to ensure that the chain is at high speed to reduce noise and vibration.
Seamless and narrow-slot cylinder technology can reduce and eliminate the impact and vibration of the cylinder during operation, which can improve the quality of the print and extend the service life of the machine. This technology has been applied in web offset presses produced by many manufacturers.
3. Pneumatic technology
Pneumatic technology has the characteristics of fast, safe, reliable, low cost, etc. It is widely used and widely recognized in the industry. A large number of pneumatic control systems have greatly reduced the complexity of the mechanical structure and reduced the difficulty of mechanical manufacturing, installation and commissioning. Such as vacuum paperboard, vacuum suction belt and variable speed paper conveying form, which makes operation and adjustment convenient and fast, and realizes stable paper feeding and accurate handover.
Pneumatic clutch pressure mechanism has stable, accurate and reliable clutch pressure, easy adjustment, and flexible mechanism layout. The pneumatic side pull gauge has strong adaptability to various printing materials, and has good positioning stability for thin paper and thick paper, and can be accurately positioned. The pneumatic device of the front stop gauge blows the airflow toward the warpage of the front end of the paper, which keeps the paper in a stable and correct posture and enters the front stop gauge, which greatly improves the registration accuracy of printing. The pneumatic ink roller landing mechanism makes the landing and landing of each roller stable and reliable. Air-cushion paper transfer and air-blown paper guide board ensure that all specifications of printed sheets can be collected smoothly and accurately, and reduce scratches and smudging during transmission. Air blowing paper guide stack and double powder injection device make the paper stack stable and tidy, which can save 30% of the powder spraying amount.
Three, automatic control value-added and efficient
Automatic control technology includes automatic registration, automatic detection and diagnosis, pre-selection and actual value display function, quality control, remote diagnosis and maintenance, ink volume remote control, etc., make full use of preset data information, greatly shorten the preparation time, thus achieving more excellent The quality of printing, shorter printing preparation time and less maintenance of the printing press, truly realize the digitization, networking and automation of printing.
1. Ink roller series control
The inking rollers move axially to make the ink thin and even. For the phenomenon of the difference in the ink color between the sky and the foot of the repetitive image in the printing of packaging labels, it can be adjusted by changing its serial commutation time, or it can be set to zero serial.
When printing is suspended, the inking of the inking roller should stop to maintain the ink distribution established during printing, so as not to cause paper waste when restarting, but also prevent the ink roller from drying, shining and wearing, and improve the service life of the ink delivery system .
2. Automatic plate changing device
The automatic plate changing device utilizes a plate box capable of loading a certain number of printing plates, and performs plate loading and unloading through an automatic control system, without the need for manual intervention, greatly reducing auxiliary time and improving work efficiency.
Non-stop plate change can replace the printing plate of non-printing printing unit when other printing units are working normally, and clean the ink system and perform various presets at the same time, which greatly reduces the auxiliary time. For example, the plate cylinder of Roland 700 adopts shaftless drive, which can realize plate-changing without stopping and increase the speed of plate-changing. It can also flexibly adjust the gap between plate cylinder and rubber cylinder.
3. Automatic cleaning device
The automatic cleaning device reduces the auxiliary working time and improves the production efficiency. At the same time, it can clean the blanket in time, keep the surface of the blanket clean, extend its service life and recycle the cleaning agent, and save production costs. It only takes 1 minute to automatically clean the rubber cylinder or the impression cylinder, and the time required is 1/6 of manual scrubbing.
The automatic cleaning device sprays the washing liquid and water directly into the cleaning roller and ink roller through the independent nozzle rod. The two nozzle rods are supplied with water and washing liquid by the central water supply tank. The direction of rotation of the brushing roller is opposite to that of the drum, and each rotation is horizontally serial to ensure thorough cleaning of the blanket. After washing, the automatic self-cleaning circulation device cleans the ink and washing liquid remaining on the brush roller and the nozzle rod. The device and waste tray are separated from the machine and can be easily disassembled. The automatic cleaning device can thoroughly clean the working surface, reduce downtime, and protect the environment. The circulating cleaning system can clean the ink roller at the same time.
4. Automatic detection device
The manroland online printed sheet detection device installs a camera on the printing unit of the last color group, performs video detection on the printed matter, monitors the quality of each printed sheet according to quality standards, identifies and identifies the printed sheets, and rejects the defective printed sheets It is transferred to another paper table of the paper collection device, thereby reducing waste in the finished product. Color measurement and control can scan and measure the printing control strip located at the edge of the printed sheet or in the middle of the printed sheet. The printing control strip is not only very small, but also has multiple measurement blocks needed for the adjustment of the gray balance, which is the best quality control method in the sheet-fed offset press.
KBA QualiTronic online printed sheet detection system can scan the printed sheet when the printing machine is running at high speed and compare it with the reference sample, mark the unqualified printed sheet, and automatically reject it when die cutting bronzing or folding. Double-sided printing machine. KBA's Tronic Professional online monitoring system with density measurement and control requires only about 60 printed sheets to standardize the density.
5. Temperature and humidity control system
The multi-function temperature control system maintains and controls the optimal temperature at startup and shutdown by measuring the temperature of the main ink rollers to reduce color adjustments and stabilize printing quality. The ink roller temperature control and cooling system keep the surface temperature of the ink roller unchanged, reduce the ink color deviation of the printed product, and stabilize the printing quality. The cooling system uses water circulation in the ink fountain roller and cross-ink roller to control the temperature of the ink roller.
The central water cooling device and internal control system can control the indoor temperature, reduce heat, improve printing quality, and at the same time reduce the airflow speed, reduce pollution and noise.
4. Combined processing with complete functions
1. Short ink supply system
The short ink path ink supply system uses an anilox roller's short ink path ink delivery device to realize inkless and waterless printing. KBA Genius52 UV is the earliest offset printing machine that uses an anilox roller short ink path inking method. At drupa2008, KBA displayed three waterless offset printing machines, namely sheet-fed printing machines Rapida 74 Gravuflow and 74 Karat DI And the web printing machine Cortina.
2. Large format offset printing machine
High speed and high efficiency are the main theme of the development of modern printing presses. The efficiency of printing presses is reflected by the printing speed and printing format. At the same printing speed, the larger the printing format, the higher the efficiency. Therefore, the development of large-format offset printing machines, especially ultra-large format offset printing machines, has become a new variety of printing equipment, expanding the use of offset printing machines and improving production capacity. Large format offset presses have reached a high level in terms of printing quality, automation control and operation performance, printing high-quality, multi-level drawings, periodicals, maps, postcards, posters and other printed matter, as well as corrugated cardboard and plastic sheets For printing materials such as wood, it can also be equipped with an online post-printing slitting device to promote the development of packaging printing.
Large format offset presses have high efficiency and a wide range of applications, but need to purchase corresponding pre-press and post-press supporting equipment, such as large-format plate making equipment, paper cutters, die cutting machines, folding machines, glazing machines and laminating machines, etc. .
3. Double-sided offset printing technology
The variable methods of single-sided multi-color printing and double-sided printing are not only to meet the user's requirements for high efficiency and flexibility, but also to the needs of the printing press market. The Heidelberg Speedmaster XL105 double-sided printing machine with paper reversing device is based on the technical advantages of the single-sided printing model, which increases productivity by 40%. KBA Rapida 142 eight-color printing machine also has a reversing function, the conversion time of reversing printing only takes 1 minute to complete double-sided four-color printing.
Double-sided printing can also be used in the form of non-reversal, there are two-sided alternating printing and two-sided printing methods. Akiyama MEGA JP4P440 double-sided double-sided four-color offset printing machine uses double-sided alternating printing. Each color group has a total of 6 cylinders in the front and back printing devices. After the front and back sides alternately print one color, it is passed to the next color group to complete the four-color printing . The machine has high stability and reliability, and can achieve a printing speed of 15,000 printed sheets per hour.
4. Combined printing and online processing
With the improvement of printing quality, printing technology has also developed in a more complicated direction. On the one hand, the rich and diverse printed products have led to the complication of the printing process. On the other hand, the combined printing process and online finishing and molding processing have also Created more beautiful prints. Combined printing and in-line processing have become the focus of most attention of printing houses and printing press manufacturers today. The advantages of this form are: the diversity of the printing system; increase the flexibility of printing methods; enhance the value-added of printed products; promote the exquisiteness of printing quality.
Combination printing can include offset printing, flexo printing, gravure printing, screen printing, digital printing and other printing methods. Combining multiple printing forms and processes to avoid the shortcomings of a single printing method, so that the various effects of a complete printed product are perfect, especially in the printing of bills, high-end packaging products, cigarette packs, etc.
On-line processing is reflected in pre-press processing and post-press processing. It can add multiple functions such as coating, compounding, transfer and glazing, hot stamping, laminating, die cutting, embossing, folding, and cutting. These functions are integrated in one production line to form a variety of production capabilities, so that products can be completed at one time, which can not only improve production efficiency, but also help reduce waste.
(1) Glazing
Varnishing is to apply a layer of colorless and transparent coating on the surface of the printed product. After leveling, drying and calendering, a thin and uniform transparent bright layer is formed on the surface of the printed product. The thin layer of glazed paint has high transparency and smoothness, which makes the surface of the printed matter show a beautiful luster, improves the surface performance of the printed matter, protects the printed graphics, and is widely used in packaging and decoration, book covers, pictures, trademarks, advertisements , Large decoration, etc.
Modern offset printing presses have adopted the glazing unit as a standard configuration, and even equipped with a double glazing unit, which can also realize the UV printing of printing materials such as plastic and cardboard. The printing format has also been expanded to below four or ultra-large format to meet customer needs. Multiple needs.
The form of glazing usually adopts roller glazing coated by anilox roller and scraper glazing with closed knife cavity to ensure the uniformity of glazing and precise control of the amount of varnish.
(2) Curing device
Generally, UV varnish is cured by ultraviolet radiation. The varnish is a mixture of active monomers or oligomers that can be polymerized by free radicals. During the curing process, the varnish is free radical or The ions also undergo a cross-linking reaction to form a solid polymer, thereby completing the curing process of the glazing paint. This drying method has broad prospects. The UV gloss is good and meets environmental protection requirements.
(3) Cold stamping device
Cold stamping is a processing technique that uses UV glue to print and peel the electrochemical aluminum foil. First apply adhesive to the graphic area of ​​the substrate that needs to be printed, and press and peel off the roller to make the metal foil transfer to the surface of the printed product. The whole process does not require heating and the cost is low. On-line hot stamping is to add a cold stamping unit on the offset press, which can be used for hot stamping before or after printing.
(4) Cutting device
On-line cutting uses roll paper to feed paper, and after cutting, single-sheet printing can be performed. This form of paper transport saves 20% in cost and is used in Heidelberg offset presses on drupa2004. Roland 700 sheetfed offset presses on drupa2008 are also equipped with this cutting device. KBA's online cutting device is set on the impression cylinder of the last unit to cut the printed material online.
(5) Post-press molding online processing
Post-press molding online processing can process various box types online, such as linear boxes, lock bottom boxes, double-wall boxes, envelope boxes, sandwich boxes, square boxes, hexagon boxes, etc. The folder gluing machine includes conveying, folding, bottom locking and other mechanisms. It requires accurate processing position, firm bonding, and adjustable size.
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