Post-Press-Processing/ Print

Cutting quality (Three way trimmer knives)

Cutting quality (Three way trimmer knives)

Problems with the cutting quality can be caused by micro-breakouts, glue residue at the knives, Color smears, oil impressions from white oil or the backrest knife.

If the cutting quality of your three-way trimmer is not satisfactory, the first step is to examine the knifes’ sharpness. It is possible that the knife is too sharp. In that case, carefully hone the knife with a cutting bar or a soft object. As appropriate, the geometry or the cutting angle has to be adjusted.

Recommendation: Use a sharp angle with small grammages and an abtuse angle with high grammages.

In the case of glue residue on the three-way trimmer we recommend to let glue and color dry sufficiently. If this is not possible, our non-stick coating aids effectively against residue. In some cases, a different geometry in combination with our new wave grinding is auxiliary. This patented grinding technology improves the knifes’ geometry, resulting in less friction during the cutting process and an improved flow of material. It furthermore decreases the downtime.


The next factor to be examined are the cutting sticks. Do you use the correct cutting stick in combination with the knifes’ quality?

Our Recommendation:
  • The qualities Durapid, Duritan & Duratec are best combined with a Polypropylen cutting stick with a hardness of 75-78 Shore D.
  • The hardmetall qualities Incomet Supreme & UltraCut are best combined with a Polyamid cutting stick with a hardness of 81-83 Shore D.
  • We recommend the combination of full cutting sticks with our three-way trimmer knives!


Please examine the knifes‘ immersion depth into the cutting stick as well.


Our Recommendation for optimal immersion depth:

  • Immersion depth of 0,1 mm at the maximum
  • Regularly change or turn the cutting bars

Furthermore we recommend the regular maintenance, including regrinding and realigning of your backrest knife.

 

Mikroausbrüche(Micro) Breakouts

Glue breakouts at the knife

undefined-4Chipping on the book spine

 

Do you need further information?

We could not clarify your individual request, or you have a question concerning another topic?

Then we will be happy to help you by phone: +49 2191 969 0 or by e-mail at: paper@tkmgroup.com

You can also send us your message using the following contact form.