In thermoforming, a lower film is placed in a tray mould, the product is inserted and sealed with a top film. Until the finished sealed product is available, the packaging process runs through several stations, which start at the lower film unwinding station and end at the cutting station.
Bearing systems, lead screws or energy chains are used at various stations of a thermoform packaging line. Using the PowerPak PLUS from GEA Food Solutions as an example, you can see the different products that have been used in these sections.
1. Lower film unwinding
2. Film guide
3. Tensioning system
4. Web edge control
5. Filling station
6. Thermoforming and sealing station
7. Labelling station
8. Cutting station
A sliding door system serves as a safety enclosure for the lower film unwinding. It operates on drylin W linear systems, which can also be used without problems in aggressive cleaning processes.
A sliding door is also used at the level of the film guide. 3 metres wide, it allows access to the machine. The drylin W linear systems also used here manage without active lubrication.
This adjustable guide roller is used to maintain the film tension. The linear retraction during the film change is undertaken by drylin JUM linear plain bearings, iglidur plain bearings prevent the electrostatic charging of the film. The bearing of the guide rollers themselves is ensured by xiros polymer ball bearing.
Under the influence of pressure and heat, the lower film gets its shape. The tools for this are adjusted on lifting stations via drylin liners and iglidur JUCM linear clip bearings. The axes at the station are supported in iglidur J and Z plain bearings.
For the energy and signal supply of the labelling dispenser of the packaging system, the solution was found in our product range of energy chains.
drylin R shaft guides RJUM-02-25 are used in the cutting tool.