How is Ink Supply System Contamination Prevented in a Unit-Type Flexo Press?

A unit-type flexo press is a versatile printing press used in the flexographic printing process. This article will explore the features and benefits of a unit-type flexo press and how it prevents ink supply system contamination.

Introduction: Basic Definition and Product Features

A unit-type flexo press is a printing press designed with modular units that can be easily combined and configured to meet specific printing requirements. Each unit of the press consists of various components, including a plate cylinder, anilox roller, inking system, and impression cylinder. These components work together to transfer ink onto the printing substrate, resulting in high-quality prints.

Advantages and Features

1. Versatility: 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.

2. 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.

3. 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.

4. Cost-Effectiveness: 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.

5. 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.

6. 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.

7. 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.

8. 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.

Working Principle of a Unit-Type Flexo Press

1. 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.

2. 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.

3. 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.

4. 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.

5. 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 a Unit-Type Flexo Press

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

How to Choose a Unit-Type Flexo Press

1. Printing Requirements: Consider the printing process, colors, and substrates required for your application.

2. Flexibility and Customization: Choose a press with modular units that offer easy customization and configuration based on your specific needs.

3. Print Quality and Registration: Look for a press that offers precise control over ink transfer, registration, and color consistency.

4. Production Speed and Efficiency: Choose a press with high-speed production capabilities and fast changeovers between jobs.

5. Substrate Compatibility: Look for a press that can print on various substrates, expanding your market opportunities.

6. Inking and Drying Systems: Consider the type and efficiency of the inking and drying systems used in the press.

7. Support and Service: Choose a manufacturer that offers excellent customer support and after-sales service.

8. Budget and Return on Investment: Consider the initial investment cost and the potential return on investment over time.

9. Industry Reputation and Reviews: Research the manufacturer’s reputation and read customer reviews to ensure quality and reliability.

10. Future Expansion and Upgrades: Choose a press that can be easily upgraded or expanded to meet future business needs.

Possible Problems and Solutions

1. 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.

2. 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


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

2. Unpacking and Assembly: Carefully unpack the press components, following the manufacturer’s instructions.

3. Electrical and Control System Setup: Connect and wire the electrical components of the press, adhering to the electrical safety guidelines and local regulations.

4. Testing and Calibration: Conduct a thorough testing and calibration process, following the manufacturer’s instructions.


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.

2. Lubrication: Follow the manufacturer’s guidelines for lubricating the press components to ensure smooth operation and prevent excessive wear.

3. Inspection and Replacement: Conduct routine inspections of the press components to identify signs of wear, damage, or misalignment.

Ever Power Inc.

Ever Power Inc. Factory Image Ever Power Inc. Factory Image Ever Power Inc. Factory Image

Ever Power Inc. is a professional manufacturer of flexo printing equipment. They specialize in the research and development of printing and packaging equipment, precision coating equipment, and special electromechanical equipment. Their 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 Inc. boasts a core technology group with expertise in 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. They have obtained over 239 national patents and more than 10 national high-tech achievement awards. The company 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 Inc.:

– Ever Power Inc. produces high-quality and reliable products that can replace other brands.
– With their advanced technology and expertise, customers can trust Ever Power Inc. to meet and exceed their printing needs.
– Choosing Ever Power Inc. will help improve user stickiness and conversion rates, resulting in better business outcomes.

Frequently Asked Questions

1. What are the main components of a unit-type flexo press?

A unit-type flexo press consists of various components, including a plate cylinder, anilox roller, inking system, impression cylinder, and drying system.

2. What makes unit-type flexo presses environmentally friendly?

Unit-type flexo presses use water-based and UV-curable inks with lower VOC emissions compared to traditional solvent-based inks. Additionally, advancements in energy-efficient drying systems contribute to sustainability efforts.

3. What are the advantages of using a unit-type flexo press for printing corrugated packaging?

Flexo presses, including unit-type flexo presses, can handle the large format and high-volume requirements of the corrugated packaging industry, making them a cost-effective solution for printing on corrugated cardboard.

4. What factors should be considered when choosing a unit-type flexo press?

Factors to consider when choosing a unit-type flexo press 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.

5. What are some common problems that can occur during the printing process, and how can they be solved?

Common problems during the printing process include ink smearing or blurring and registration issues. Solutions include ensuring proper ink viscosity and consistency, adjusting doctor blade pressure, verifying that anilox rollers are clean, checking for excessive plate wear or damage, optimizing drying parameters, calibrating mechanical adjustments, aligning printing plates accurately, and regularly cleaning and maintaining registration sensors and control systems.