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March 10, 2024
What is stack flexo printing machine?
Summary The stack flexo printing machine is one of the three types of flexo printing machines. Flexo printing is a recognized green printing method. It emits less when printing with ink and has no pollution to the environment. In addition to conventional paper and PVC, the substrates for flexo printing are Corrugated paper, film and other materials can also be printed. Therefore, flexo printing is widely used in food packaging and pharmaceutical packaging. The stacked machine has a simple structure and a lower price than the other two types. It has the largest market share. Structure of Flexo printing machine The printing color groups of the stacked flexographic printing machine are stacked up and down and arranged on one or both sides of the main wall panel of the printing component. Each printing color group is driven by a gear mounted on the main wall panel. During printing, the substrate passes through each printing group in sequence to complete all printing. Each printing color group has an impression cylinder, a plate cylinder and an ink transfer device, and the structure of each printing color group is the same. The laminated flexographic printing machine can print 1 to 8 colors, but most of them are 6 colors. If equipped with a flipping device, it can also print on the front and back sides.
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March 10, 2024
What is CI ( central impression) flexo printing machine?
Summary CI flexographic printing press, also known as central drum flexographic printing press. Each printing unit surrounds a Central impression cylinder. The printing material is wrapped around a common impression drum for registration printing. Because the gears are directly driven, whether it is paper or film, even if no special control device is installed, it can still be overprinted very accurately, and the printing process is stable. It is often used to print color products. Some people have predicted that CI flexo printing will be the new mainstream of flexo printing in the 21st century. Structure of CI Flexo printing machine The CI flexographic printing machine is mainly composed of 4 parts, namely, the unwinding and feeding parts, the printing parts, the drying parts and the rewinding and rewinding parts. In addition, there are generally measurement and control devices such as tension control, edge control, registration control, and print observation, as well as mechanical status monitoring and fault diagnosis systems. Since the material is tightly wrapped on the central impression drum, the tension of the material is very stable, and the machine's registration accuracy is very high, which can reach ±0.1mm. This color registration accuracy is significantly better than the other two types of flexo printing machines. At the same time, the CI flexo printing machine occupies less space than the gravure printing machine, has lower requirements for site personnel, uses solvent inks and water-based inks, and is environmentally friendly and causes less environmental pollution. There is a worldwide trend of flexo printing replacing gravure printing. It should be […]
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March 10, 2024
Structure of CI flexo printing machine
Among the three types of flexographic printing presses, CI printing presses are the most important. All printing units revolve around a central impression drum, and the material is tightly wrapped on the central impression drum with stable tension. It mainly includes the unwinding and traction part, printing part, drying part （intercooler drying and final drying）, cooling part, rewinding part, main transmission and control part. 1.Unwind part. In the unwinding part, it is usually equipped with an air shaft clamping material （shaftless unwinding can be selected when the substrate is heavy）. An automatic tension control system is used to ensure the tension of the substrate during high-speed printing, and a web guide system Ensure that the orientation of the substrate does not deviate. The traction mechanism is used to drive the substrate forward and control the printing speed. 2. Printing part The most important structure of the satellite printing press is the printing part. As shown in the figure, all printing units surround the central impression drum. The impression drum adopts a double-wall structure, which is beneficial to the temperature control of the impression cylinder. The surface of the impression roller has a nickel-plated protective layer and is equipped with a water circulation system. To keep the outer surface temperature of the impression cylinder constant and prevent the impression cylinder from thermal expansion. Each printing unit is composed of an automatic ink circulation system, a scraper, a ceramic anilox roller, and a plate roller. Generally, electric pressure registration device and hydraulic mechanical auxiliary pressure adjustment are used. generally equipped with a […]
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