In hot riveting, thermoplastics are heated and riveted at individual points. One of the components is made of plastic, the other can be made of any material and is loosely placed on the plastic part. The rivet tip is heated to the required temperature and then forms the plastic rivet. After cooling down, a form-fit connection is created.
The hot riveting jigs are adapted to the geometry of the components, as the riveting tips can be fastened at different heights and angles. The riveting direction can be from above as well as from below. We also have solutions for very narrow riveting points. By using component-specific changing devices, different products can be made on the same system with minimal set-up effort.
High current principle and heating cartridge principle
The rivets themselves can also be produced in various geometries (e.g. round, oval, rectangular, angled or as a special solution) and in various sizes (previously: approx. 6 – 32 mm³, other sizes possible).
In general, we distinguish between the high current principle and the heating cartridge principle.
The cartridge heater principle
Heating cartridges in the riveting tip generate the heat with this principle. It is particularly suitable for a large number of riveting tips.
The high current principle
A connected power supply unit supplies the riveting tip directly with power. This provides a very short heating time of only two seconds. Only the tip is heated, so this system is very efficient.
Hans von der Heyde ensures the high quality of both processes:
- The riveting tip is adjusted by a pneumatic cylinder. Height tolerances in the component can be compensated in this way. A linear measuring system with a repeat accuracy of 0.1 mm monitors the riveting process.
- The initial height of the riveting tip can be set for the process via parameters. In this way we monitor whether the rivet dome is available or not.
- It is possible to select whether the shut-off criterion for the process is the riveting duration or the riveting path.
- Rapid cooling of the riveting tip at the end of the process by air flushing.