Manufacturer of precision components and heatsinks made from aluminium extrusion profiles for power electronics
Junior Kühlkörper GmbH
58840 Plettenberg (Headquarters, Production)New on Amplifa
About Junior Kühlkörper
Junior Kühlkörper GmbH is a family-owned company based in Plettenberg (North Rhine-Westphalia) that has specialised for over 40 years in the development and manufacture of heatsinks and precision components made from aluminium. The product range includes more than 250 extrusion profiles in standard versions, customer-specific special profiles, large profiles as well as the 4000 series high-performance heatsinks with a frictional joining process. All heatsinks are produced at the home site in Plettenberg – on more than 70 CNC machining centres with an annual capacity of more than two million precision components. A 5-axis machining centre allows the machining of large components up to 16 m in length. In addition to series production, the company offers cooling concept development, thermal simulations, prototype construction and special solutions such as bonded or welded heatsinks as well as surface treatments. The products are used, among other things, in power electronics, automation, medical, energy and rail technology as well as aerospace.
- Site
- Plettenberg
- Processes
- Extrusion profiles (extruded profiles), CNC machining of extrusion profiles, 5-axis machining of large profiles (large sections), Milling with 5-axis spindle (swivel axis, pendulum machining up to 6,500 m), Bonding of heatsinks (special solutions), Welding of heatsinks (special solutions), Innovative joining process for the 4000 series (frictional connection), Surface treatment of heatsinks
- Materials
- Aluminium, Extrusion profiles with tolerances according to EN 12020 and EN 755
- Certificates
- DIN EN 12020 / EN 755 (tolerance standards for extrusion profiles), EN 12020 / EN 755 (tolerance standards), ISO 9001
- Employees
- over 200
- Industries
- Electrical industry, Power electronics, Automation technology, Medical technology, Energy technology, Rail technology
- 01
Cooling concept development & thermal simulation
- 02
Extrusion profile procurement (partner extrusion plants)
- 03
CNC machining (70 machining centres, 5-axis large-profile machining)
- 04
Joining (bonding, welding, 4000 series)
- 05
Surface treatment
- 06
Ready-to-install precision components
Materials & Processes
Aluminium
Preferred material for heatsinks thanks to high thermal conductivity, low weight and good machinability.
Extrusion profiles with tolerances according to EN 12020 and EN 755
Industry standards for dimensional tolerances of aluminium extrusion profiles, according to which the manufactured profiles are produced.
Sites
Plettenberg
DEHeadquarters with complete production; all heatsinks are manufactured here
- Part weight / size
- Profile weights 0.1–75 kg/m; large components up to 16 m in
- Lot size
- Prototypes to large-scale series (over 2 million components/year)
- Materials
- Aluminium extrusion profiles
- 70 CNC machining centres
- 5-axis large-profile machining centre (16,000 × 600 × 400 mm, 40-pocket tool magazine, 10 automatic clamping vises, up to 18,000 rpm)
- Pendulum machining up to 6,500 m
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Extrusion profiles (extruded profiles)Forming | according to EN 12020 and EN 755 | – | 0.1 kg/m – 75 kg/m | Large-scale series (over 2 million | Aluminium |
| CNC machining of extrusion profilesMachining | – | – | – | Prototypes – Series production | Aluminium |
| 5-axis machining of large profiles (large sections)Machining | – | 16,000 mm × 600 mm × 400 mm | – | – | Aluminium |
| Milling with 5-axis spindle (swivel axis, pendulum machining up to 6,500 m)Machining | – | 16,000 mm × 600 mm × 400 mm | – | – | Aluminium |
| Bonding of heatsinks (special solutions)Joining | – | – | – | – | Aluminium |
| Welding of heatsinks (special solutions)Joining | – | – | – | – | Aluminium |
| Innovative joining process for the 4000 series (frictional connection)Joining | – | – | – | – | Aluminium |
| Surface treatment of heatsinksSurface | – | – | – | – | Aluminium |
| Thermal simulationEngineering | – | – | – | – | Aluminium |
| Cooling concept developmentEngineering | – | – | – | – | Aluminium |
| Prototype constructionAssembly | – | – | – | – | Aluminium |
2 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC machining centres | – | 70 | – | – | Plettenberg |
| 5-axis machining centre (large-profile machining centre) | – | 1 | 16,000 mm x 600 mm x 400 mm (x/y/z), 5-axis, tool change magazine with 40 tool positions, approx. 35 | – | Plettenberg |
Additional services
Quality
Production is carried out with holistic quality management; the dimensional accuracy of the extrusion profiles complies with the tolerance standards EN 12020 and EN 755. A certified dynamic quality management system ensures product quality from prototype to large-scale series.
| Evidence | Plettenberg |
|---|---|
| EN 12020 / EN 755 (tolerance standards) | |
| ISO 9001 |
History
Over 40 years of experience in the development and manufacture of aluminium heatsinks and precision components in Plettenberg.