Thermal direct joining of metal and plastic without adhesive – machines, engineering and job shop
HYJOIN GmbH
MunichNew on Amplifa
About HYJOIN
HYJOIN GmbH, based in Munich, is a deep-tech company in the field of joining technology that is industrializing thermal direct joining (hyJOIN®) of metal and plastic without adhesive. The technology originates from an invention at the Fraunhofer Institute and was brought to market maturity together with the mid-sized company Kist + Escherich. The process comprises laser structuring of the metal surface (laserTREAT®), contactless induction heating and pressing, producing a permanent, media- and aging-resistant joint that can be released again for repair or recycling. The portfolio includes machines from the manual cell to the fully automated production line (coreJOIN®, coreSUPPLY®, varioJOIN®, giroJOIN®, atroJOIN®) as well as engineering services and job-shop production from prototypes and small series to series ramp-up. Customer industries include automotive and e-mobility, electronics, new energy, medical technology, aerospace and industrial applications.
- Site
- München
- Processes
- Thermal Direct Joining of Metal & Plastic (hyJOIN®), Laser remote structuring of metal surfaces (lasertreat®) – microstructuring as pretreatment, Induction heating & pressing of hybrid joints, Engineering Services (Tech Center R&D, Design to X, Design Thinking, Maintenance), Job Shop – joining orders from prototype to small series / series ramp-up
- Materials
- Metal (general), Plastic (general), Titanium, Thermal Direct Joining (hyJOIN®), Laser remote structuring, Metal-plastic hybrid joints
- Industries
- Automotive & Mobility, Electronics, New Energy, Medical Technology, Aerospace, Industrial Solutions
- 01
Laser structuring of the metal surface (laserTREAT®)
- 02
Component positioning in the precision tool
- 03
Induction heating of the metal
- 04
Pressing and curing of the joint
- 05
Inspected metal-plastic component
- 06
Optional: separation for repair/recycling (Re-hyJOIN®)
Materials & Processes
Thermal Direct Joining (hyJOIN®)
Adhesive-free thermal joining of metal and plastic via induction heating and pressing into laser-structured surfaces.
Laser remote structuring
Chemical-free microstructuring of the metal surface as pretreatment for permanent hybrid joints.
Titanium
Titanium-plastic hybrids for structural components in aerospace.
Metal-plastic hybrid joints
General hybrid joints for lightweight construction, tightness and recyclability.
Locations
Munich
DEHeadquarters, Tech Center, machine engineering and job-shop production
- Lot size
- Prototype, small series, series ramp-up
- Materials
- Metal, plastic, titanium
- coreJOIN® joining module
- coreSUPPLY® supply and control unit
- varioJOIN® Semi-Automatic
- giroJOIN® rotary table cell
- atroJOIN® full automation
- laserTREAT® laser system
Components & Applications
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Thermal Direct Joining of Metal & Plastic (hyJOIN®)Joining | – | – | – | – | Metal, Plastic, Titanium (titanium-plastic hybrids, aerospace) |
| Laser remote structuring of metal surfaces (lasertreat®) – microstructuring as pretreatmentSurface | – | – | – | – | Metal |
| Induction heating & pressing of hybrid jointsJoining | – | – | – | – | Metal, Plastic |
| Engineering Services (Tech Center R&D, Design to X, Design Thinking, Maintenance)Engineering | – | – | – | – | – |
| Job Shop – joining orders from prototype to small series / series ramp-upJoining | – | – | – | Small series / pilot series – Series ramp-up | Metal, Plastic |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Semi-automatic device for thermal direct joining of metal with plastic | HYJOIN varioJOIN® | – | – | – | Munich |
| Joining system for integration | HYJOIN coreJOIN® | – | – | – | Munich |
| Supply and control unit for coreJOIN® | HYJOIN coreSUPPLY® | – | – | – | Munich |
| Processing cell for thermal direct joining with rotary table | HYJOIN giroJOIN® | – | – | – | Munich |
| Fully automated joining solution | HYJOIN atroJOIN® | – | – | – | Munich |
| Laser system for metal structuring (laser remote structuring) | HYJOIN laserTREAT® | – | – | – | Munich |
History
Invention of thermal hybrid joining of metal and plastic at the Fraunhofer Institute
Industrialization and market maturity together with the mid-sized company Kist + Escherich
Founding of HYJOIN GmbH in Munich for scaling, internationalization and further development
- 2026
Joined the Composite United network; cooperation with Konzelmann at the IAA; funding from the EU and SAB