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April 14, 2005
Determining the cause of slitter blade wear
To determine the cause of slitter blade wear, look for the tell-tale signature wear patterns on blades that will help you differentiate between blade-to-blade wear, and web-to-blade wear.
Once the distinctive patterns of wear are classified, the solutions will be easier to recognize and implement without resorting to "taking a stab in the dark"' or applying an unnecessarily costly solution to a relatively simple problem.
A general rule of thumb for general-purpose slitting is that the texture of a slitter blade should be imperceptible to the "fingernail test"–an approximate microfinish of 8 or smoother. Blades with tip angles of 45 deg and sharper require even smoother surface textures.
Posted by Reiny Schable at April 14, 2005 08:59 AM
Comments
I have a question to clarify your advice here. Is this something to look for after you are experiencing bad cut quality? Is this a test you look for when you take you blade out of the machine?
Let me know..
Posted by: tjwalker at April 19, 2005 07:19 AM
I saw your add on PFFC mag. and I am looking to purchase preasure sensitive paper from China, can you help me or guide me to a supplier in China?
Thank you for your help
Leslie Roman
labels@2by2.net
Posted by: Leslie Roman at May 25, 2005 11:27 PM
As to factors of shear cut blade wear: I often see operators use their hands or even a hammer to add side load pressure. They say this helps make a blade cut when it stops cutting. This can not be good for top or bottom blade life. I say the problem is simply a dull blade. Change to a sharp blade and normal side load. Adding excessive side load simple wears out the blades faster as well as contributing to dust.
I wonder what experience others have with this issue?
Posted by: mike flannigan at October 21, 2005 12:53 PM
Does anyone know of any measurement device (profilometer?) or established metric to quantify blade wear? We shear-slit poly film with very fragile coatings which necessitates thin, low angle blade edges to minimize disturbance of the coating. Blade wear is characterized by chipping of the fragile edge. We have identified what we think would be better blade materials and want to try a test but we need a quantitative method to evaluate the results.
Thanks
Posted by: T Higgins at October 28, 2005 06:57 AM
