Hey there! If you're in the business of packaging or printing, you've probably wondered how to print on corrugated cardboard using a flexographic press machine. Well, you're in the right place. I'm a supplier of flexographic press machines, and I'm here to share some tips and tricks to help you get the best results.
Understanding the Basics of Flexographic Printing
Before we dive into the specifics of printing on corrugated cardboard, let's go over the basics of flexographic printing. Flexography is a form of relief printing, which means that the image to be printed is raised above the non - printing areas. This type of printing uses flexible printing plates, typically made of rubber or photopolymer material.
The flexographic press machine consists of several key components: an anilox roll, which meters the ink onto the printing plate; the printing plate cylinder, which holds the printing plate; and the impression cylinder, which presses the substrate (in this case, corrugated cardboard) against the printing plate to transfer the ink.
Why Flexographic Printing for Corrugated Cardboard?
There are several reasons why flexographic printing is a great choice for corrugated cardboard. First of all, it's a fast and efficient printing method. You can print at high speeds, which is crucial for large - scale production. Secondly, flexography can handle a wide range of ink types, including water - based, UV, and solvent - based inks. Water - based inks are especially popular for corrugated cardboard printing because they're environmentally friendly and dry quickly.
Another advantage of flexographic printing on corrugated cardboard is its ability to print on irregular surfaces. Corrugated cardboard has a bumpy texture, but flexographic printing plates can conform to this surface, ensuring a clear and consistent print.
Preparing Your Flexographic Press Machine for Corrugated Cardboard Printing
Selecting the Right Printing Plate
The choice of printing plate is crucial. For corrugated cardboard, a photopolymer plate with a medium - to - high durometer (hardness) is often a good choice. A harder plate can better withstand the pressure of printing on the uneven surface of the cardboard without deforming.
Setting Up the Anilox Roll
The anilox roll is responsible for metering the ink. The cell volume and line count of the anilox roll need to be carefully selected based on the type of ink and the desired print quality. For corrugated cardboard, a roll with a relatively high cell volume and a lower line count may be needed to ensure enough ink is transferred to the bumpy surface.
Adjusting the Impression Pressure
Since corrugated cardboard is uneven, setting the right impression pressure is key. Too much pressure can cause the cardboard to crush or the ink to spread, while too little pressure will result in a faint or incomplete print. You'll need to make some test prints and adjust the pressure accordingly.
Printing Process on Corrugated Cardboard
Loading the Corrugated Cardboard
Make sure the corrugated cardboard is properly loaded into the press. It should be fed smoothly and evenly to avoid any misalignment or jams. You may need to adjust the guides and rollers to accommodate the thickness and width of the cardboard.
Ink Mixing and Application
Mix your ink thoroughly to ensure a consistent color. When applying the ink to the anilox roll, make sure there are no air bubbles or clumps. The ink should flow smoothly onto the roll and then onto the printing plate.
Printing and Quality Control
As the corrugated cardboard passes through the press, keep an eye on the print quality. Check for any smudging, streaking, or color inconsistencies. If you notice any issues, stop the press immediately and make the necessary adjustments.
Troubleshooting Common Problems
Faint Prints
If your prints are faint, it could be due to several reasons. The anilox roll may not be transferring enough ink, the impression pressure may be too low, or the ink may be too thick. Check the anilox roll for clogging, adjust the pressure, or thin the ink as needed.
Ink Smudging
Ink smudging can occur if the cardboard is not dry before the next process or if the impression pressure is too high. You can try increasing the drying time or reducing the pressure.
Our Range of Flexographic Press Machines
As a supplier of flexographic press machines, we offer a wide range of products. For example, our Automatic CI Type BOPP PE BP Film 4 Colour Flexo Printing Machine is a great choice for printing on various films as well as corrugated cardboard. It's highly automated, which means it can increase your production efficiency and reduce labor costs.
Our Flexographic Printing Machine is a versatile option that can be customized to meet your specific printing needs. Whether you need to print simple text or complex graphics on corrugated cardboard, this machine can deliver high - quality results.
If you're looking for a top - of - the - line machine, check out our ProStar 6 - Color CI Flexo Printer - Superior Print Quality for Packaging. With its advanced technology, it provides superior print quality for all your packaging requirements, including corrugated cardboard printing.
Conclusion
Printing on corrugated cardboard using a flexographic press machine can be a highly rewarding process. With the right machine, proper preparation, and a bit of troubleshooting know - how, you can achieve high - quality prints for your packaging needs.
If you're interested in purchasing a flexographic press machine for corrugated cardboard printing or want to learn more about our products, don't hesitate to contact us for a purchase discussion. We're here to help you make the right choice for your business.
References
- "Flexographic Printing Technology" - A comprehensive guide on flexography principles and operations.
- "Corrugated Packaging Handbook" - Covers the properties and printing requirements of corrugated cardboard.