What Are the Considerations for Selecting an Ink Supply System for a Unit-Type Flexo Press?

A unit-type flexo press is a versatile printing press that offers excellent flexibility and adaptability in printing applications. It is widely used in industries like flexible packaging, corrugated packaging, labels and tags, folding cartons, and paper products. One of the essential components of a flexo press is the ink supply system, which plays a crucial role in achieving high-quality, vibrant, and consistent prints. In this article, we will discuss the considerations for selecting an ink supply system for a unit-type flexo press, along with the basic definition, product features, advantages, working principles, applications, installation, maintenance, and a company introduction.

What is a Unit-Type Flexo Press?

A unit-type flexo press is a type of printing press used in the flexographic printing process. It 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

Product Features and Advantages

Unit-type flexo presses offer great versatility and flexibility 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. Other advantages of unit-type flexo presses include:

  • High Printing Quality
  • Speed and Efficiency
  • Cost-Effectiveness
  • Wide Substrate Compatibility
  • Environmentally Friendly
  • Inline Finishing Options
  • Continuous Innovation

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

The working principle of a unit-type flexo press involves several components that work together to transfer ink onto the printing substrate. The key components of a flexo press include:

  1. Plate Cylinder
  2. Inking System
  3. Impression Cylinder
  4. Drying System
  5. Repeatable Units

The plate cylinder holds the image or artwork to be printed, while the 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. 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. 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. 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 widely used in various printing applications, including:

  • Flexible Packaging
  • Corrugated Packaging
  • Labels and Tags
  • Folding Cartons
  • Paper Products

Unit-type flexo presses are commonly used for printing on flexible packaging materials, such as plastic films and laminates. They are suitable for applications like food packaging, pouches, bags, wrappers, and labels. Flexo presses are widely employed for printing on corrugated cardboard used in packaging boxes and containers. They are preferred for printing labels and tags used in various industries, including retail, logistics, and manufacturing. Unit-type flexo presses are also utilized for printing on folding cartons, commonly used in the packaging of consumer goods, cosmetics, pharmaceuticals, and other products. They are suitable for printing on a wide range of paper products, including newspapers, magazines, catalogs, books, and stationery.

Unit-Type Flexo Press Applications

Considerations for Selecting an Ink Supply System

The ink supply system is a crucial component of a unit-type flexo press that affects print quality, efficiency, and cost-effectiveness. When selecting an ink supply system, the following considerations should be taken into account:

  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 Problems and Solutions

During the use of a unit-type flexo press, some problems may occur, which can affect print quality and efficiency. The following are some common problems and their solutions:

  1. Ink Smearing or Blurring
  • 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
    • 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 require careful planning and execution to ensure optimal performance and longevity. The following are some essential steps for installation and maintenance:


    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.
  • 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.
  • 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.
  • 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.


    1. 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.

    Company Introduction

    Ever-Power is a professional factory that manufactures flexo presses. Ever-Power is based on the transformation and application of aerospace optoelectronic technology, relying on precision machining and manufacturing capabilities. The company 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 Factory
    Ever-Power Factory
    Ever-Power Factory

    Ever-Power has a core technology group, including tension system coupling modeling and decoupling control technology, equipment intelligent control technology, precision coating composite technology, high-speed high-definition printing technology, coating curing and solvent residue control technology, and multi material adaptive winding technology. The company has obtained over 239 national patents, more than 10 national high-tech achievement awards. Ever-Power has obtained ISO9001:2015 international quality system certification, SGS certification, and EU CE safety certification, and has a complete after-sales service system.

    Choose Ever-Power for your flexo press needs. Our products are comparable to other leading brands, and we offer excellent support and service to our customers. Join us in exploring the possibilities of flexo printing and achieve your printing goals with Ever-Power.

    Questions and Answers

    1. What is a unit-type flexo press?
    2. A unit-type flexo press is a type of printing press used in the flexographic printing process. It is designed with modular units that can be combined and configured according to specific printing requirements.

    3. What are the advantages of a unit-type flexo press?
    4. The advantages of a unit-type flexo press include versatility, high printing quality, speed and efficiency, cost-effectiveness, wide substrate compatibility, environmental friendliness, inline finishing options, and continuous innovation.

    5. What are the considerations for selecting an ink supply system for a unit-type flexo press?
    6. The considerations for selecting an ink supply system include 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.

    7. What are some common problems that may occur with a unit-type flexo press?
    8. Some common problems that may occur with a unit-type flexo press include ink smearing or blurring and registration issues.

    9. What are some essential steps for the installation and maintenance of a unit-type flexo press?
    10. Essential steps for the installation and maintenance of a unit-type flexo press include site preparation, unpacking and assembly, electrical and control system setup, testing and calibration, regular cleaning, lubrication, and inspection and replacement.