WHAT YOU SHOULD KNOW ABOUT FLEXO END SEALS
Choose the correct flexo end seals for your application to achieve proper doctor blade seating. If used correctly, these low-cost consumables can save printers thousands of dollars in waste and downtime. The job of the end seals is to keep the coating or ink from leaking out of the chamber’s ends.
PROBLEMS CAUSED BY FAILED FLEXO END SEALS
Why Do Chamber Leaks Happen?
While there are other causes of chamber leaks, failed end seals account for the majority of them.?Enlist the assistance of your end seal supplier to resolve these issues and ensure that you are using the appropriate end seals for your application.
When a chamber leaks, a press operator will frequently try to solve the problem by increasing the load pressure rather than looking for the source of the leak.?The doctor blade should be subjected to some upward pressure to form an adequate seal, but not so much that it requires additional loading pressure to make contact with the?anilox roller in the blade’s center.
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Materials for Chamber System End Seals
End seal materials vary in terms of abrasion resistance, durability, and solvent resistance. Again, your end seal supplier can assist you in determining the best material for your application:
Final Thoughts on Flexo End Seals?
Choosing the right seal material and design for your application, as well as replacing end seals as needed, will help ensure that inks and coatings?do not leak out of the chamber. End seals, despite their low cost, have the potential to save thousands of dollars in waste and downtime.
Did you find this interesting ? Read and Learn more about flexo printing at?Flexopedia
Embalaje Flexible en Niltor Grup
2 年In my opinion, the article reflects a point of view, correct, but somewhat outdated on this important element in the flexographic printing process. It is true that, in general, there is very little knowledge about END SEALS and their influence. Today, we can find a really wide range of not only materials (of course, foam is the most common), but also hybrids of materials and contact surfaces, which adapt to the demanding needs of today's flexographic processes, since either in Corrugated, narrow band, or Flexible packaging...