News & Knowhow

What factors should be taken into account for the quality of the cut? In addition to the bevel, the tooth pitch also has an influence on the quality of the cut. How can the cutting quality be improved? At TKM we can produce cutting blades with up to ...

How do cutting knives break? If cutting knives made of powder-metallurgical steels are set too deep into the cutting bar, there is a risk that they will break. How can this problem be prevented? Adjust the depth of the knife into the cutting bar. Tip...

Which factor have an impact on the durability of cutting knives? The type of tooth, the tooth pitch, the chamfer, the raw material, the setting and the cutting stick all have an influence on the durability of cutting knives. At TKM, we have carried o...

What problems can occur with wash-up blades? Wash-up blades made of rubber or other cheap materials only last a short time. Furthermore, they do not clean proper, which results in longer washing times and an increased need for cleaning liquids. How c...

The thread breaks off when installing the punctures. When does this problem occur? With folding pins that are made from one piece and hardened for better durability, it can happen that the thread breaks off during installation. How can I prevent the ...

What causes folding tolerances? With folding pins in conventional design, it often happens that the inner ribbon tends to form bubble (see arrow), which can result in folding tolerances. How can the folding tolerances be avoided? The improved design ...

The durability of the folding pin depends on the steel used and the design. What causes an increased wear? In the conventional design, the ribbons are guided by the parallel area around the collecting cylinder. Due to the forward orientation of the f...

1. Check stability of the knife holder 2. Check concentricity, max. 0,03 mm (axial concentricity should be max. 0,01 mm) 3. Check the cutting point – the anvil should lift the paper web max. 1,0 mm 4. Check cant angle, if necessary, service the knife...

A main problem during cutting of paper is dust formation. Root causes can be: Wrong speed of the knives too much overlap Low steel quality Bad surface quality No or small cant angle Solution: Modify the relevant parameters

If the overspeed of the knife is incorrect in proportion to the web, the following problems can occur: Alow overspeed leads to unclean cuts, is the slitter slower as the web, it will lead to ribbon breaks. A high overspeed leads to more dust formatio...