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Adding a Nip Roll Assembly


Nip roll assemblies include 2 rolls that are "loaded" together so that there is pressure applied to whatever is fed between the two rolls. Nip rolls can be used to assist in laminating operations where two or more layers of webs are to be bonded to one another. Nip rolls are also used to "divorce" tension zones. Here are some things to consider when choosing a nip roll design for whatever application your may have for them:

  • You may have to drive the nip roll assembly, so get a drive supplier involved in the conversation to discuss line speed and tension issues.
  • Loading. There are several ways to load nip rolls, spring loading, air loading and mechanical loading. Keep in mind, there may be safety issues when considering that type of loading.
  • Rubber covering one, both or none of the rollers in the nip roll assembly.
  • If you are going to rubber cover any of the rollers in the nip roll assembly, consider what type, thickness and hardness of the rubber is desired.
  • Roll finishes are often important.
  • Deflection calculations should be completed and the nip roll assembly should be designed to limit the amount of roller deflection.

Many other considerations may arise for your specific application. Be sure all variables are accounted for in the nip design to provide the best possible performance for your application.



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