Is it possible to improve the printing production efficiency and reduce the environmental load while improving the printing quality? This seemingly impossible dream has now been realized at the first user of KBA's waterless newspaper printing press. The waterless printing concept has been around for many years, and now the technology is gradually making progress that can be expected. Krause-Biagosch GmbH is one of the leading manufacturers of this innovative technology. This company has developed a new plate-making machine designed for waterless printing presses. It has high production efficiency. The combination of torque motors and linear motors speeds up the entire automated exposure process and achieves the same as waterless printing presses. Coordinate operations.
If a printing press can shorten the printing time of the newspaper while still being able to complete the task on time, then it has a clear competitive advantage, because it can postpone the deadline for newspaper editing, so that the published information is more real-time. This requires the new printing system to be faster than traditional printing presses.
At the same time, fierce competition has prompted publishers to keep their presses running 24 hours a day, including accepting print jobs from other publishers and some print ads. This means that the printed matter needs to be replaced more frequently. Shortening the newspaper circulation cycle is an overall trend. Therefore, in addition to high production efficiency, extremely short printing preparation time and extremely high flexibility are also important factors for measuring the quality of a printing system.
However, the improvement of printing efficiency must not be at the expense of printing quality: consumers hope that the printed matter can continue to use the four-color printing process. On the other hand, it is becoming a new trend that newspapers become the same size as magazines. A small newspaper can make it easier for readers to read, and if the image resolution remains the same, the dot pixels will become clearer. This is like the closer the viewer sits to the TV screen, the clearer the picture. Therefore, if the quality of the image provided to the reader remains the same and the format becomes smaller, the clarity of the image will surely be improved.
Waterless printing improves printing quality
Unlike traditional offset printing, waterless printing is a new printing method that does not require fountain solution. In the traditional printing process, the fountain solution forms a uniform water film on the blank part of the printing plate to resist the infiltration of the ink on the graphic into the blank part to prevent the dirty version. However, in waterless printing, the silicon substrate replaces the fountain solution, which reduces the use of water and chemical raw materials, and avoids the phenomenon of ink coloring water or slurring under the influence of solvents. This can improve the printing quality and form brighter colors on the printed matter. Waterless printing can reduce the start-up time of the device and reduce the printing error rate associated with the printing plate (in water-based offset printing, the device needs to be preheated after the device is started to achieve the desired saturation of the color). In addition, the waterless printing system is also not easy to be dirty, does not need to be cleaned frequently, and is almost not corroded by organic solvents. The most important thing is that it eliminates the environmental pollution of wastewater in traditional offset printing.
First-class CTP plate-making machine: X-Jet
The plate-making machine used in water-based offset printing cannot be used for waterless printing. However, Krause, which is famous for newspaper pre-press systems, designed a CTP (Computer To Plate) direct plate-making machine specifically for KBA Cortina waterless printing machine : Krause X-Jet plate-making machine has excellent purple laser imaging technology, accurate imaging quality and fully automated plate processing technology.
"From the beginning, our goal was to increase production efficiency to synchronize plate output with the press even faster," said Thomas Richter, Technical Director of Krause-Biagosch GmbH. X-Jet is a modular plate-making machine: the largest printing plate processing area is 640x940mm, and the fastest can process 260 printing plates per hour.
Positioning accuracy 2μm
The laser system can generate 64 laser beams to expose the printing plate mounted on the drum. When the imaging drum rotates, the linear motor drives the laser system to scan synchronously with the drum axis. "The synchronization accuracy of the drum and the laser beam must reach 2 microns to ensure that the spot imaging and exposure head movement are synchronized," Richter explained.
High torque servo motors from B & R can provide the required positioning accuracy for this task. ACOPOS servo drive is used to control the movement of this motor, and another servo drive controls the linear motor. "Unlike many other equipment manufacturers, we have adopted direct drive technology very early and have benefited from its many advantages," Richter said. "By providing our customers with high productivity, high quality and highly automated equipment, we can overcome our competitors including well-known international giants like Kodak and Fuji. If we do not use the most advanced technology , Then this is simply impossible to achieve. For several years, our partner B & R has been expanding their most advanced automation product line to provide us with good support and services. "
Highly automated and simplified operation
The successful cooperation between the two parties can be traced back to the early 1990s, when B & R provided Krause with an unparalleled new product: B & R Power Panel with integrated touch screen function. "At the time, only B & R was able to provide this device, which replaced many functions previously performed by mechanical structures, greatly improving the degree of automation of the equipment," Richter concluded.
The improvement in automation and the resulting improvement in operating comfort are also vividly reflected in the design of the latest X-Jet plate-making machine, as Krause ’s manager emphasized: “Users expect to continue to reduce equipment operation difficulty and reduce operation The operator ’s threshold of operation, even unmanned operation. This means that the device must use a control display system to integrate more and more functions. The unified automation solution from B & R is the basis for achieving this goal. It also reduces costs. "
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