In the field of flexible packaging and label printing, central impression (CI) flexo printing machine have become indispensable equipment for large-scale production due to their stable and efficient performance. They are particularly adept at handling flexible web materials such as plastic films and paper, enabling stable and high-speed multi-color printing.
Core Structure: Precision Layout Around the Central Impression Cylinder
The most distinctive feature of a central impression flexo printing machine is its structural design—all printing units are arranged in a circular configuration around a large central impression (CI) cylinder. This unique concentric arrangement ensures the relative positional accuracy between printing units from a mechanical design perspective, which is key to achieving high registration accuracy.
1.Unwinding and Rewinding Systems: The unwinding system smoothly feeds the web material and provides a stable foundation for subsequent printing through precise tension control. The rewinding system rolls the finished product with constant tension, ensuring neat winding .
- Central Impression (CI) Cylinder: This is a large-diameter steel cylinder that undergoes precise dynamic balancing and constant temperature control. All color printing units are evenly distributed around it. The substrate is tightly wrapped around this cylinder to complete the registration of all colors.
● Machine Details
3.Printing Units: Each printing unit represents one color and is typically arranged around the CI cylinder. Each unit includes:
● Anilox Roll: Its surface is engraved with numerous uniform honeycomb-shaped cells responsible for quantitatively transferring ink. The surface is densely covered with uniform microstructures, and ink volume is controlled by line count and cell volume.
● Doctor Blade: Works in conjunction with the anilox roll to scrape off excess ink from its surface, leaving only the quantified ink in the cells, ensuring consistent and even ink distribution.
● Plate Cylinder: Mounts the flexible photopolymer plate engraved with the graphic content.
4.Heating and Drying Unit: After each printing unit, an efficient drying device (typically hot air or UV curing system) is installed to instantly dry the freshly printed ink, preventing smudging during color overprinting and providing technical support for high-speed printing.
● Video Introduction
Technical Advantages and Application Value
The central drum flexographic printing plate's structural design offers significant advantages. The central impression cylinder ensures extremely high register accuracy, making it particularly suitable for printing intricate patterns and gradient colors. Its compact layout saves space while enabling high-speed production, reaching speeds of several hundred meters per minute.
In addition, our central drum flexo printing machine is equipped with an automated control system that precisely adjusts tension, registration, and printing pressure, significantly improving production efficiency and ensuring consistent product quality.
The CI flexo printing machine plate not only excels in technical performance but also demonstrates wide adaptability and significant economic benefits in practical applications. Our equipment is compatible with environmentally friendly materials such as water-based and UV inks. Combined with an efficient exhaust gas treatment system and energy recovery device, it significantly reduces volatile organic compound emissions and energy consumption during the production process. In summary, the CI flexographic printing press is continuously promoting technological progress and industrial upgrading in the packaging and printing industry with its outstanding technical performance and continuous innovative development trend, providing end customers with high-quality, high-efficiency and environmentally friendly printing solutions, and becoming an indispensable and important equipment in modern printing production.
● Printing Sample
Post time: Aug-29-2025