How is Ink Adhesion Optimized for Different Substrates in a Unit-Type Flexo Press?

A unit-type flexo press is a versatile printing press used in the flexographic printing process. This press is designed with modular units that can be combined and configured according to specific printing requirements. Each unit of the press consists of various components, such as a plate cylinder, anilox roller, inking system, and impression cylinder, which work together to transfer ink onto the printing substrate.

Unit-Type Flexo Press Work

Basic Definition and Product Features

Unit-type flexo presses offer great flexibility and versatility in printing applications. The modular design allows for easy customization and configuration of the press based on the desired printing process, substrate, and colors required. This adaptability makes it suitable for a wide range of industries and products.

Flexo presses have made significant advancements in recent years, achieving excellent print quality comparable to other printing methods. The unit-type flexo press provides precise control over ink transfer, registration, and color consistency, resulting in sharp, vibrant, and high-resolution prints.

Unit-type flexo presses are known for their high production speeds. They can handle rapid printing tasks, making them suitable for large-scale printing operations. Additionally, quick setup times and fast changeovers between jobs contribute to improved efficiency and reduced downtime.

Flexo printing, including unit-type flexo presses, is generally considered a cost-effective solution for medium to high-volume printing. The presses utilize flexible printing plates, which are more affordable compared to other plate types. Additionally, the ability to print on a wide range of substrates reduces the need for additional printing processes, resulting in cost savings.

Unit-type flexo presses are compatible with a variety of substrates, including paper, cardboard, films, labels, and flexible packaging materials. This versatility allows for printing on different materials, expanding the range of applications and market opportunities.

Flexo printing, including unit-type flexo presses, has made significant strides in reducing environmental impact. Water-based and UV-curable inks are commonly used, which have lower volatile organic compound (VOC) emissions compared to traditional solvent-based inks. Additionally, advancements in energy-efficient drying systems contribute to sustainability efforts.

Unit-type flexo presses can be equipped with various inline finishing options, such as laminating, die-cutting, embossing, and varnishing. This eliminates the need for separate post-printing processes, reducing production time and costs.

The flexographic printing industry is continuously evolving, with ongoing advancements in technology, materials, and processes. Unit-type flexo presses benefit from these innovations, allowing printers to stay competitive and meet the changing demands of the market.

Unit-Type Flexo Press

Working Principle

The unit-type flexo press works on the following principles:

  • Plate Cylinder

    The unit-type flexo press has a plate cylinder with a flexible printing plate attached to it. The plate cylinder holds the image or artwork to be printed.

  • Inking System

    Anilox rollers transfer ink to the plate cylinder. The inking system consists of an ink fountain, doctor blade, and anilox roller. The doctor blade ensures an even layer of ink is applied to the anilox roller, which then transfers the ink to the plate cylinder.

  • Impression Cylinder

    The impression cylinder receives the substrate to be printed. It presses the substrate against the plate cylinder, allowing the ink from the plate to transfer onto the substrate.

  • Drying System

    After the ink is transferred to the substrate, a drying system is employed to evaporate solvents or cure the ink. Drying can be achieved through various methods, such as heated air, UV lamps, or infrared radiation.

  • Repeatable Units

    Unit-type flexo presses are designed with repeatable units, which can be combined to achieve multi-color printing. Each unit consists of a plate cylinder, anilox roller, inking system, and impression cylinder. The units can be adjusted and synchronized to ensure accurate registration and color consistency.


Unit-type flexo presses are suitable for various printing applications, such as:

  • Flexible Packaging: Plastic films and laminates used in food packaging, pouches, bags, wrappers, and labels
  • Corrugated Packaging: Corrugated cardboard used in packaging boxes and containers
  • Labels and Tags: Labels and tags used in various industries, including retail, logistics, and manufacturing
  • Folding Cartons: Folding cartons used in the packaging of consumer goods, cosmetics, pharmaceuticals, and other products
  • Paper Products: Paper products, including newspapers, magazines, catalogs, books, and stationery

Unit-Type Flexo Press Application

How to Select a Unit-Type Flexo Press

When selecting a unit-type flexo press, the following factors should be considered:

  1. Printing Requirements
  2. Flexibility and Customization
  3. Print Quality and Registration
  4. Production Speed and Efficiency
  5. Substrate Compatibility
  6. Inking and Drying Systems
  7. Support and Service
  8. Budget and Return on Investment
  9. Industry Reputation and Reviews
  10. Future Expansion and Upgrades

Possible Issues and Solutions

When using a unit-type flexo press, the following issues may arise:

  • Ink Smearing or Blurring

    Problem: Ink smearing or blurring can occur during the printing process, leading to poor print quality and reduced clarity of the printed image.


    • Ensure proper ink viscosity and consistency.
    • Adjust the doctor blade pressure to achieve a clean and even ink transfer.
    • Verify that the anilox roller is clean and free from dried ink or debris.
    • Check for excessive plate wear or damage and replace if necessary.
    • Optimize drying parameters to ensure proper ink curing.
  • Registration Issues

    Problem: Registration problems result in misalignment of colors or images, causing a distorted or offset print.


    • Verify that all mechanical adjustments, such as gear settings and tension controls, are properly calibrated.
    • Check for worn or damaged gears, cylinders, or rollers and replace as needed.
    • Ensure the plate cylinder and substrate tension are correctly set.
    • Align the printing plates accurately and securely on the plate cylinder.
    • Regularly clean and maintain the registration sensors and control systems.

Installation and Maintenance

The installation and maintenance of a unit-type flexo press involve the following steps:


  1. Site Preparation

    Ensure a suitable location with adequate space, ventilation, and access for the press installation.

    Prepare a level and stable foundation to support the press's weight and minimize vibrations.

    Install necessary utility connections, such as electrical power, compressed air, and water supply, as per the press specifications.

  2. Unpacking and Assembly

    Carefully unpack the press components, following the manufacturer's instructions.

    Assemble the press units, including the printing units, drying systems, infeed, and outfeed sections, according to the provided assembly guidelines.

    Install and align the necessary mechanical components, such as cylinders, gears, and rollers, ensuring proper fit and functionality.

  3. Electrical and Control System Setup

    Connect and wire the electrical components of the press, adhering to the electrical safety guidelines and local regulations.

    Install and configure the control system, including the operator interface, sensors, motors, and drives, ensuring proper communication and functionality.

  4. Testing and Calibration

    Conduct a thorough testing and calibration process, following the manufacturer's instructions.

    Verify the functionality of each press unit, including the printing, drying, and control systems.

    Perform test runs using sample substrates to ensure proper operation and identify any issues that need to be addressed.


  • Regular Cleaning

    Clean the press components, such as cylinders, rollers, and ink systems, on a regular basis to remove ink residues, debris, and contaminants.

    Use appropriate cleaning solutions and methods recommended by the manufacturer to avoid damage to the press parts.

    Pay special attention to critical areas, such as doctor blades, anilox rollers, and plate cylinders, to maintain optimal print quality.

  • Lubrication

    Follow the manufacturer's guidelines for lubricating the press components to ensure smooth operation and prevent excessive wear.

    Use recommended lubricants and apply them at the specified intervals and locations.

    Regularly inspect lubrication points for any leaks or insufficient lubrication.

  • Inspection and Replacement

    Conduct routine inspections of the press components, such as gears, bearings, belts, and sensors, to identify signs of wear, damage, or misalignment.

    Replace any worn or damaged parts promptly to prevent further issues and maintain optimal performance.

    Keep a stock of essential spare parts recommended by the manufacturer to minimize downtime.

Unit-Type Flexo Press Application


Unit-Type Flexo Press Factory
Unit-Type Flexo Press Factory
Unit-Type Flexo Press Factory

EVER-POWER is a professional factory that manufactures flexo presses. EVER-POWER utilizes precision machining and manufacturing capabilities and is dedicated to the research and development of printing and packaging equipment, precision coating equipment, and special electromechanical equipment. The main products include printing equipment, precision coating equipment, new energy and new material production lines, complete sets of water treatment film materials production lines, complete sets of decorative materials production lines, intelligent production lines, and precision processing businesses.

EVER-POWER has a core technology group that has obtained over 239 national patents and more than 10 national high-tech achievement awards. EVER-POWER has also obtained ISO9001:2015 international quality system certification, SGS certification, and EU CE safety certification, and has a complete after-sales service system.

Ever-POWER products provide a viable alternative to other brands. We encourage customers to explore and purchase our products, which will increase user stickiness and conversion rates.

Questions and Answers

  1. What are some benefits of using a unit-type flexo press?

    Answer: Unit-type flexo presses offer great flexibility, high printing quality, speed and efficiency, cost-effectiveness, wide substrate compatibility, environmental friendliness, inline finishing options, and continuous innovation.

  2. What are some issues that can arise during the printing process with a unit-type flexo press?

    Answer: Ink smearing or blurring and registration issues can be common problems when using a unit-type flexo press.

  3. What factors should be considered when selecting a unit-type flexo press?

    Answer: Printing requirements, flexibility and customization, print quality and registration, production speed and efficiency, substrate compatibility, inking and drying systems, support and service, budget and return on investment, industry reputation and reviews, and future expansion and upgrades.

  4. What applications are unit-type flexo presses suitable for?

    Answer: Unit-type flexo presses are suitable for printing on flexible packaging, corrugated packaging, labels and tags, folding cartons, and paper products.

  5. What are some possible solutions to ink smearing or blurring during the printing process?

    Answer: Ensuring proper ink viscosity and consistency, adjusting the doctor blade pressure, verifying that the anilox roller is clean, checking for excessive plate wear or damage, and optimizing drying parameters can be some solutions to ink smearing or blurring during the printing process.