Shrink-fitting unit for cables and heater cables

Fast, accurate shrinking of heater cables for underfloor heating systems

A customer manufactures a wide range of different underfloor heating systems. The cable ends of the heater mats for electric underfloor heating systems must be shrunk-fitted and crimped for this purpose.

A recirculating system was developed in which the heater mats are fed to different positions on workpiece carriers. The products are manually fitted with PTFE heat shrink sleeves and shrunk-fitted in a specially developed heat chamber.

To this end, an LE-R air heater with nozzle unit and a medium-pressure blower were installed in the seven-metre-long installation. The shrinking process takes place at a temperature of approx. 400 °C. Finally, the cable ends are then crimped in a machine. The entire process is controlled by a PLC.

Technical data of the installation

  • Air heater LE-R
  • Control cabinet PLC-controlled

On the far left of the picture you can see the crimping unit, and behind it the shrink tunnel. The switch cabinet is on the right and the controls can be seen in the background.

Transfer system to the shrink tunnel

The medium pressure blower supplies the air heater (centre of picture) with fresh air. The hot air is fed into the shrink tunnel through heat-insulated hoses.

We look forward to hearing your requests.

Contact us, we will be pleased to advise you.


HAPRO Industriegeräte GmbH
Schorberger Str. 40
42699 Solingen, Germany

Phone +49 212 317374
Fax +49 212 317315