Revolution in Hybrid Connections

Join metal + plastic in seconds

A person adjusting component for a thermal joining process

Revolution in Hybrid Connections

revolution
in hybrid connections

Join metal + plastic in seconds

Revolution in Hybrid Connections

revolution
in hybrid connections

Join metal + plastic in seconds

[the mission]

We transform manufacturing with thermal hybrid joining of metal and plastic – a fast, cost-efficient, and fully recyclable alternative to gluing, welding, screwing, and overmolding. hyJOIN® enables lightweight & disruptive designs, sustainable production, and a circular future.

[benefits]

Key Advantages

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High Performance Joining

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Media Tight Connections

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Cost Efficient Process

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Aging Resistance

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Lightweight Design

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Fully Recyclable

[thermal direct joining]

Our IP. Our Technology.

hyJOIN® provides an innovative solution for metal-plastic joining using the process of thermal direct joining, also referred to as thermal hybrid joining. In this method, the metal is precisely heated so that the plastic melts on contact and, once cooled, forms a durable hybrid bond. This advanced technology replaces conventional methods such as gluing, welding, screwing, or overmolding and enables lightweight, recycling-friendly designs. Discover more about this sustainable joining process, which works entirely without adhesives or additional materials, opening new possibilities for product innovation.

[ 01 ]

Pre-treat

Laser Structuring of Metal Component

Laser Structuring of Metal Component

[ 02 ]

Component Fixation

[ 03 ]

Electromagnetic Induction and Pressing

[ 04 ]

Joined Component
[industries & applications]

Your product with
our solution

Automotive & Mobility

Battery housings & modules (e-mobility), Body & structural components, Interior/exterior parts (handles, consoles, trims)

Consumer Goods & Household

Household appliances (coffee machines, refrigerators, washing machines), Power tools (drills, mixers, garden tools), Sports equipment (bicycle components, fitness gear, outdoor equipment)

Electronics

Connectors & interfaces, Sensor and actuator housings, Thermal management, and cooling solutions (heat sinks with plastic housings)

New Energy

Battery modules & packs, Hydrogen systems (tanks, valves, pipelines), PV & wind components (housings, structural elements)

Healthcare / Medical

Medical device housings (pumps, analyzers, scanners), Sterile instruments (reusable & recyclable), Implant-related components

Aerospace & Defense

Cabin & interior components, Structural parts (titanium-plastic hybrids), Electronic housings (avionics systems)

Industrial Solutions

Pumps & valves, Machine & drive housings, Functional modules for industrial systems

(Any) industry

These are just examples. Our solutions adapt to countless industries wherever plastic and metal need to be joined.

coreJOIN® compact joining module for metal-plastic connection
[news & updates]

News and updates from the team

Stay hyjoined with our latest updates

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hyjoin GmbH
12 Aug 2026
linkedin
Save the date! 🗓️

Everyone here are mostly on a little summer break, but too excited about this one to stay quiet.

On 30 September, our CEO & Founder @Jakob Wäschenbach and Lead Engineer @Dr.-Ing. Jan Krollmann are speaking at @Composites United's Webseminar Wednesday about: Thermal Direct Joining of Metal–Thermoplastic Hybrid Structures.

The joint between metal and fiber-reinforced thermoplastic is where hybrid design usually gets hard. We'll show how our own technology hyJOIN®, bonds the thermoplastic directly to a pre-treated metal surface under heat and pressure, no adhesives, no fasteners, separable again, and recyclable by material type.

We'll get into the process fundamentals, cycle times under five seconds, and the full chain from part idea to series production, including the conditions under which industrialization in six months is realistic. And, with the experience of real customer projects, we'll talk openly about what accelerates a project, where the typical hurdles sit, and what it takes to reach reliable series maturity.

30 Sept, 2026 · 9:00–10:00 am CET · Online \(Zoom\)
Registration via Composites United ↓

Link in the comments! See you there?

we are on

a mission

[careers]

Join the club – shape the future of joining

At HYJOIN, we combine industrial excellence with start-up spirit. We are bold, agile, and passionate about technology and sustainability. Join our team and help us build disruptive products, expand into new industries, and drive international growth.

See How To Apply
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