hyJOIN®
Thermal direct joining of metal with plastic

Key Facts
Joining complex components in seconds Firm connection without added materials Flexibility thanks to interchangeable heating modules The smart alternative to gluing
Our hyJOIN® joining technology offers an ultra-modern solution for stable and media-tight bonding of metal and plastics, without the need for additional materials. The process is based on targeted inductive heating, in which the plastic is softened in the joining area and, after cooling, creates a firm adhesion to the metal.
Electromagnetically induced eddy currents generate the required heat directly at the defined joining point in the metal using our hyJOIN® technology. This focused heating process causes the thermoplastic to melt, so that after heating it will bond with the previously roughened metallic surface.
The hyJOIN® process creates joint strengths comparable to those of structural bonding, but in a process that can be automated and that takes only a few seconds. This technology not only guarantees an efficient and fast connection, but also lasting stability and high load-bearing capacity. In addition, an integrated force and travel path monitoring makes accurate process control possible, which compensates any component tolerances and minimizes joining times.
Another big advantage of the hyJOIN® joining technology is its reversibility. The created connections can be undone with little damage to the parts, which makes for easy repairs of the assemblies or recycling of materials at the end of their service life. Our reliable and flexible hyJOIN® technology can process various metal-plastic combinations and offers numerous applications, from small assemblies to complex structures. Point-shaped and media-tight connections can thus be produced in very reliable processes.
- 1
coreJOIN® module including joining tool
The two joining partners are pressed together and simultaneously heated, causing the plastic to soften at the contact area and bond with the metal. coreJOIN® modules are installed in KIST + ESCHERICH machines or can be integrated directly into production lines in combination with coreSUPPLY® supply units.
- 2
Plastic component
- 3
Metal component
- 4
Inductor
Embedded in the upper joining die, the inductor is energized by a high-frequency alternating current. Simulations and laboratory tests are used to ensure precise design.
- 5
Electromagnetic field
The concentrated electromagnetic field induces eddy currents in the metal component.
- 6
Heating zone
The joining area is rapidly and locally heated and then passively cools down quickly.
- 7
Lower joining die