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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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March 10, 2024
What are the methods and characteristics of self-adhesive label printing?
Self-adhesive label is a kind of material, also called self-adhesive material. It is a composite material with paper, film or other special materials as the fabric, adhesive on the back, and silicon-coated protective paper as the base paper. Self-adhesive label It is the general name for materials with such properties. Self-adhesive labels are also called self-adhesive labels, instant stickers, instant stickers, pressure-sensitive paper, etc. They are made of paper, film or special materials as the fabric, with an adhesive on the back and a silicon-coated backing paper as the protective paper. Composite materials are made into finished labels after printing, die-cutting and other processing. When applying, you only need to peel it off from the backing paper and apply it to the surface of various substrates with a gentle press. You can also use a labeling machine to automatically label on the production line. So, what are the methods of self-adhesive label printing? What are the characteristics? Printing method one: letterpress printing Manufacturers use letterpress printing to print self-adhesive labels. The printing plate is a photosensitive resin letterpress plate. The printed labels have the advantage of full ink color. However, the grades of letterpress printing equipment vary greatly now, and some still use circular flattening letterpress machines. Some use ordinary rotary letterpress printing machines, and some have adopted professional slant-back, satellite or unit-type self-adhesive label printing machines, so they cannot be generalized during the transformation. Professional self-adhesive printing machines that mainly focus on letterpress printing have the ability to print film labels, but they need to contact the supplier to […]
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