How is Ink Supply System Cleanliness Maintained in a Unit-Type Flexo Press?

A unit-type flexo press is a printing press commonly used in the flexographic printing process. This type of press is designed to have 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

Advantages and Features of Unit-Type Flexo Presses


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.

High Printing Quality

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.

Speed and Efficiency

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.

Wide Substrate Compatibility

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.

Environmentally Friendly

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.

Inline Finishing Options

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.

Continuous Innovation

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 of Unit-Type Flexo Presses

The unit-type flexo press operates using the following process:

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.

Applications of Unit-Type Flexo Presses

Unit-type flexo presses have a wide range of applications, including:

Flexible Packaging

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.

Corrugated Packaging

Flexo presses are widely employed for printing on corrugated cardboard used in packaging boxes and containers. Unit-type flexo presses can handle the large format and high-volume requirements of the corrugated packaging industry.

Labels and Tags

Flexo presses are preferred for printing labels and tags used in various industries, including retail, logistics, and manufacturing. Unit-type flexo presses enable high-quality, durable, and customizable printing on different label materials.

Folding Cartons

Unit-type flexo presses are utilized for printing on folding cartons, commonly used in the packaging of consumer goods, cosmetics, pharmaceuticals, and other products. They offer efficient production speeds and excellent print quality for intricate designs and vibrant colors.

Paper Products

Flexo presses are suitable for printing on a wide range of paper products, including newspapers, magazines, catalogs, books, and stationery. Unit-type flexo presses can handle high-speed printing and large print volumes required in the paper industry.

unit-type flexo press

How to Choose a Unit-Type Flexo Press

When selecting a unit-type flexo press, consider the following factors:

Printing Requirements

Determine the printing requirements such as substrate, ink type, and color requirements to select a press that can meet those needs.

Flexibility and Customization

Consider the level of flexibility and customization available with the press to ensure it can adapt to changing printing requirements and processes.

Print Quality and Registration

Check the print quality and registration accuracy of the press to ensure it can produce high-quality prints without color drift or registration issues.

Production Speed and Efficiency

Assess the production speed and efficiency of the press to determine whether it can handle the required printing volume and meet production deadlines.

Substrate Compatibility

Ensure that the press is compatible with the substrates to be printed, including their size, thickness, and surface characteristics.

Inking and Drying Systems

Check the inking and drying systems of the press to ensure they are compatible with the ink type and can achieve proper ink transfer and curing.

Support and Service

Research the support and service options available for the press to ensure that technical issues can be addressed promptly and effectively.

Budget and Return on Investment

Consider the upfront cost of the press and the potential return on investment based on the printing volume and market demand.

Industry Reputation and Reviews

Research the reputation of the press manufacturer and read customer reviews to gain insights into the reliability and performance of the press.

Future Expansion and Upgrades

Consider the potential for future expansion and upgrades of the press to ensure it can adapt to changing market demands and technological advancements.

Possible Problems and Solutions in Using a Unit-Type Flexo Press

While unit-type flexo presses are generally reliable and efficient, there are some common issues that may arise during use:

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.

unit-type flexo press

Installation and Maintenance of Unit-Type Flexo Presses


The installation of a unit-type flexo press requires careful consideration of several factors:

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.


Proper maintenance is critical to ensure the longevity and optimal performance of a unit-type flexo press:

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.


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

Introduction to EVER-POWER

EVER-POWER is a professional factory that specializes in manufacturing flexographic printing presses. Based on aerospace optoelectronic technology, EVER-POWER relies on precision machining and manufacturing capabilities. They are dedicated to the research and development of printing and packaging equipment, precision coating equipment, and special electromechanical equipment. Their 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 that includes 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 and 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.

EVER-POWER is committed to providing a high-quality and cost-effective alternative to other brands of flexographic printing presses. They encourage customers to explore and purchase their products, which can help improve user stickiness and conversion rates.

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

  5. What applications are unit-type flexo presses suitable for?
  6. Unit-type flexo presses are suitable for flexible packaging, corrugated packaging, labels and tags, folding cartons, and paper products.

  7. How do you choose a unit-type flexo press?
  8. When selecting a unit-type flexo press, consider factors such as 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.

  9. What are some common issues that may arise during the use of a unit-type flexo press?
  10. Common issues that may arise during the use of a unit-type flexo press include ink smearing or blurring and registration issues.