Various methods such as stretch or shrink technology can be used for labelling. Linear and rotary bearing products as well as energy chains from igus are used in various areas, which must meet numerous requirements such as high precision and wear resistance, freedom from lubricants, corrosion resistance or resistance to cleaning agents.
Using the Sleevematic TS from Krones AG as an example, the various stations of modern labelling machines and the igus products used in them are shown below: The polymer products perform a wide variety of tasks such as the cross and height adjustments of the sleeve brush, belt station or the infeed and outfeed sensors.
1. Transverse and height adjustment of belt station
2. Height adjustment of sleeve brush
3. Transverse and height adjustment of pre-shrink unit
4. Height adjustment of hold-down device
5. Adjustment of infeed and outfeed sensor
6. Height adjustment of guide roller
7. Bearing of guide rollers
8. Adjustment of safety door
The transverse adjustment of the belt station is guaranteed by an iglidur J trapezoidal thread flange nut, which is lubrication-free and insensitive to dirt. For the height adjustment, iglidur J flange nuts are used.
The height adjustment of the sleeve brush is ensured by a trapezoidal lead screw nut in combination with drylin R solid plastic plain bearings . This made it possible to work very compactly and cost-effectively.
The height adjustment of the pre-shrink unit was implemented with a drylin SLW-1040 lead screw module including clamping, position indicator and crank for format adjustment.
Infeed as well as outfeed sensor are adjusted with a WS-1040 profile rail and a carriage including manual clamping. By the individual carriages, the adjustment could be made very compact and flexible.
A drylin SLW-1040 lead screw module including angle drive and accessories is used for the height adjustment of the guide roller. It was possible to make the compact adjustment unit more user-friendly by deploying the angular drive.
Previously used metallic bearings in the guide rollers did not run smoothly enough and the complete roller stopped sometimes. Today, they each consist of two smooth-running xiros polymer ball bearings and an anodised aluminium tube.
Lastly, the adjustment of the safety door is provided by the drylin N-27 series . The extremely flat guide could be accommodated in a very confined space.