Secure, clean clinching for a filter maker

1 min read

One of the UK’s leading air filter, and air filter bag manufacturer had the problem of unreliable fastenings on its filter frames and consequently suffered filter bag contamination. Because of this international fastenings specialist Böllhoff was approached to address the problem.

Bollhoff resolved the issues, designing and manufacturing an automated multi-head RIVCLINCH® system. This system is capable of assembling filter bag assemblies with different widths, media and frame heights.

The clinching process is a method of joining sheet metal or extrusions by localised cold-forming of the materials.

The result is an interlocking friction joint between two or more layers of material formed by a punch into a special die.

Coated and painted sheet metals can also be joined together with no damage to the surface finish.

The RIVCLINCH® joining technique can be used to join steel and stainless steel materials as well as aluminum and/or non-ferrous materials in a cost effective, environmentally friendly process.

The new system has not only solved the filter media contamination, but also increased productivity, due to the system’s speed and reliability. Simple design, enables the system to adjust to different filter frame widths and clinch joints with minimal down time. A control system has an integrated PLC that allows the system to automatically sense and adjust to the number of filter hoops within the filter assembly.

Because of the increased productivity and reduced filter bag assembly times, extended entry and exit rail assemblies to cope with the increase in capacity were necessities. Adjustable width rail assemblies were manufactured to fit around the automated Rivclinch® system allowing operatives time to pack the completed filter bag assemblies.

The Bollhoff Rivclinch® system has enabled the manufacturer Air to double production.

In summary, Advantages of Bollhoff Rivclinch® systems offer:

  • Simple set up and ease of use.
  • Completely clean joining process.
  • Excellent tooling life, up to 250,000 cycles.
  • Automatic, pneumatic die cleaning facility.
  • Superb cycle times, below 3 seconds.
  • Exceptional build quality and reliability.