Development and manufacturing of custom keyboards, keycaps, HMI control units and electronic assemblies
GMK electronic design GmbH
92533 Wernberg-KöblitzNew on Amplifa
About GMK electronic design
GMK electronic design is a family-owned company founded in 1992 and headquartered in Wernberg-Köblitz (Bavaria), specialising in the development and manufacturing of custom keyboards, keycaps, display and control panels as well as peripheral devices. As a full-service provider, GMK accompanies projects across the entire product life cycle: from product development and EMC-compliant PCB design through prototyping, EMS production (SMD/THT assembly, reflow, wave and hand soldering) to module and final assembly, functional testing, packaging and after-sales service. In-house manufacturing areas include 2-component injection moulding for keycaps (ABS, PBT), 3D printing, CNC machining and test equipment construction. Materials include plastic, aluminium, stainless steel and thermally tempered float glass. The systems are used in industries such as automation/robotics, automotive, mechanical engineering, medical technology, financial services, data centres, airports, energy/process industry and the food industry. All products are developed and manufactured in Germany.
- Site
- Wernberg-Köblitz
- Processes
- SMD assembly (automated), THT assembly, Reflow soldering, Wave soldering, Hand soldering, Module and final assembly, UV printing, Laser marking
- Materials
- ABS material, PBT material, Aluminium, Stainless steel, Plastic, Float glass (thermally tempered), Anodised aluminium, 2-component injection moulding
- Certificates
- DIN EN ISO 9001:2015, EMAS (eco-audit), ISO 9001, EMAS (environmental management)
- Founded
- 1992
- Industries
- Automation/Robotics, Automotive, Financial services, Information technology, Infrastructure and building technology, Mechanical engineering
- 01
Product development & schematic design
- 02
PCB design
- 03
Prototyping & testing (3D printing, CNC, test equipment construction)
- 04
SMD/THT assembly & soldering
- 05
2K injection moulding / module and final assembly
- 06
Functional testing & packaging
- 07
Service & support
Materials & Processes
2-component injection moulding
Process for durable keycaps made of ABS and PBT with embedded legend.
ABS material
Plastic for CYL keycaps in the Cherry profile.
PBT material
100 % pure PBT for the MTNU keycap series.
Aluminium
Housing material for keyboards and fanless panel PCs, also anodised.
Stainless steel
Robust housings for industrial keyboards in mechanical engineering.
Float glass (thermally tempered)
2 mm control panel of the QT100 touch keyboard, printed 3 times with anti-fingerprint coating.
Sites
Wernberg-Köblitz
DECompany headquarters, development, production (SMD/THT), administration
- Part weight / size
- Assemblies up to 640 × 510 mm
- Lot size
- Small series with high variant diversity up to high volume
- Materials
- Printed circuit boards (PCB), plastic (ABS/PBT), aluminium, stainless steel
- Automated SMD assembly line
- Reflow soldering
- Wave soldering
- Hand soldering
- 2K injection moulding
- 3D printing
- CNC machining
- Test equipment construction
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| SMD assembly (automated)Assembly | – | 640 mm × 510 mm | – | High volume | Printed circuit boards (PCB) |
| THT assemblyAssembly | – | – | – | – | Printed circuit boards (PCB) |
| Reflow solderingJoining | – | – | – | – | – |
| Wave solderingJoining | – | – | – | – | – |
| Hand solderingJoining | – | – | – | – | – |
| Module and final assemblyAssembly | – | – | – | – | – |
| UV printingSurface | – | – | – | – | Plastic |
| Laser markingSurface | – | – | – | – | – |
| Laser engravingSurface | – | – | – | – | – |
| Functional testingTesting | – | – | – | – | – |
| 2K injection moulding (2-component injection moulding technology for keycaps)Plastics | – | – | – | 150 sets (standard colours) / 250 sets | ABS, PBT |
| Pad printingSurface | – | – | – | – | ABS, PBT |
| 3D printingAdditive | – | – | – | – | – |
| CNC machiningMachining | – | – | – | – | – |
| Prototype and pre-series productionEngineering | – | – | – | – | – |
| Test equipment construction (hardware and software)Testing | – | – | – | – | – |
| EMC pre-tests / EMC pre-compliance testingTesting | – | – | – | – | – |
| Climate simulationsTesting | – | – | – | – | – |
| Service life testing (MTTF)Testing | – | – | – | – | – |
| PCB design / printed circuit board layout (multilayer, HDI/microvia, flex/rigid-flex, high-speed,Engineering | – | – | – | – | – |
| Product development (conception, schematic, firmware, application development)Engineering | – | – | – | – | – |
| CAD design of mechanical components (Solidworks)Engineering | – | – | – | – | – |
| Development and manufacturing of custom keyboards (membrane, long-travel, short-travel, metal andAssembly | – | – | – | – | Plastic, Aluminium, Stainless steel, Float glass |
| Manufacturing of custom keycaps (doubleshot keycaps)Plastics | – | – | – | 150 sets | ABS, PBT |
| Foil design (membrane technology for control units)Surface | – | – | – | – | Plastic |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| SMD assembly line (automated) | – | – | Max. assembly size 640 mm x 510 mm | – | Wernberg-Köblitz |
Additional services
Quality
Quality management has been monitored since 2010 by external audits of TÜV SÜD Management Service GmbH according to DIN EN ISO 9001:2015. Before delivery, GMK subjects all products to a comprehensive final inspection with functional testing using modern QM methods.
| Evidence | Wernberg-Köblitz |
|---|---|
| ISO 9001 | |
| EMAS (environmental management) |
History
- 1992
Founding of GMK electronic design by Manfred Güntner and Wolfgang Kredler
- 1993
Commissioning of the first SMD production line for automatic assembly of printed circuit boards
- 2000
Capacity expansion, move into a new administration and production building in Wernberg-Köblitz
- 2002
External certification of the environmental management system according to EMAS
- 2011
Portfolio expansion to include 2K keycaps (doubleshot keycaps)
- 2015
Entry into IoT/smart metering with first projects for intelligent electricity metering
- 2016
Launch of the consumer brand UNIQEY
- 2019
Founding of a subsidiary in the USA
- 2021
New construction of the company headquarters; launch of the Linux-based HMI WebPanel series