News & Knowhow

Overlap is too high: If the slitter dip too deep the cutting point and speed of the slitter is changing, as it will be driven by the friction with the anvil. Both will lead to more dust formation, higher wear/lower durablity. Worst case scenario is a...

Contact pressure is too high: If the contact pressure is too high, there is a possibility to press the cant angle towards zero, furthermore it leads to a higher wear and eventually a further loss of speed of the anvil in comparison to the slitter. Co...

If the concentricity axial as radial is not given, it can influence the drive of the slitter and lead to breaks on the knives – especially with carbide knives. Clean the knife holder Replace bearings Setup knives with torque wrench and tighten screws...

If the slitter is set too deep, the paper web touch the slitter at first and tears, which can lead to dust and ripped ribbons. Setting up the correct overlap in relation to outer diameter of the slitter and the axle offset Tip: Ideally the anvil dive...

If, after the cutting process the ribbon of the anvil is lead over the ribbon of the slitter, it is possible that both ribbons will be damaged. In the worst case this can lead to ribbon break. Some cutting systems can turn the cutting unit and theref...

Due to a bad surface quality, dust formation occurs. With a high surface quality like through lap grinding reduces dust formation significantly Best surface qualities are with carbide metal knives

The back angle of the bottom knife has an impact on the cutting quality and the durability of the anvil. Problem 1: Back angle is too large Problem 2: Back angle is too low Solution to problem 1: low durability of the knives increased dust formation ...

Depending on the application the edge geometry of the upper knife has an influence on the durability, cutting quality, safety and the risk of breakings. Problem 1: Breaks on the knife edge, especially with carbide metal knives Problem 2: Bad cutting ...

A major factor on knife durability is the raw material used. The better the steel quality, the better the general durability of the knife. High-quality materials are more sensitive and have the tendency to chip- especially carbide metals, here it mus...

A flat cant angle close to zero results in a poor unclean, torn cut, increased dust formation and as worst-case ribbon breaks. Attention: Should the knife holder or the bearings have too much clearance due to wear and tear, it results that the pre-se...