
Metal and special machinery construction: tank construction, welded constructions, doors and gates, as well as machine maintenance
Künzel Metall- und Sondermaschinenbau GmbH
Riemenstraße 11, 74906 Bad RappenauNew on Amplifa
About the Company
Künzel Metall- und Sondermaschinenbau GmbH was founded in 1972 by Heinz Künzel in Bad Rappenau and has been run in the second generation by graduate engineer (Dipl. Ing.) Alexander Künzel since 2007. The company with 10 employees realizes custom constructions and fabrications in steel, stainless steel and aluminium. Services include tank construction, welded constructions such as stairs and fall protection according to EN 14122, pedestals and platforms, door and gate construction as well as machine repairs with maintenance, turning, drilling and milling of spare parts. Static calculations and three-dimensional constructions are carried out in-house. For over 30 years, the company has been a partner to the automotive industry and foundry technology; customers include Audi, KS Kolbenschmidt, Daimler-Benz, Fibro, Heidelberger Druck and KS Aluminium GmbH.
- Site
- Bad Rappenau
- Processes
- Construction and manufacture of tanks made of steel and stainless steel, Manufacture of components, stairs, fall protection (welded constructions according to EN 14122), Construction and manufacture of doors and gates (T 30, smoke-proof, sound-proof, flood protection, Machine repairs / maintenance with repair welding, Turning of spare parts, Drilling of spare parts, Milling of spare parts, Construction and manufacture of machine parts
- Materials
- Steel, Stainless steel, Aluminium, Welding processes (all common processes), Sheet metal working, cutting and bending, Turning, drilling, milling
- Certificates
- Certified welding company according to DIN 18800, Welding of steel load-bearing structures according to DIN EN 1090-2, Certified company according to WHG §19, Hold-open devices for fire and smoke protection doors (member of the Fire, Large qualification certificate (since 1995), HP0, HP0 (on request), ISO 9001
- Founded
- 1972
- Employees
- 10
- Industries
- Foundry technology and mechanics, Automotive industry and suppliers, Printing machinery, Fire protection, Public institutions, SMEs
- 01
Construction and static calculation
- 02
Sheet metal working, cutting and bending
- 03
Machining (turning, drilling, milling)
- 04
Welding work
- 05
Assembly
- 06
Disassembly and maintenance
Materials and Processes
Steel
Main material for tank construction (3–12 mm wall thickness), steel load-bearing structures and welded constructions.
Stainless steel
Used for tanks, stairs and components with increased corrosion requirements.
Aluminium
Used for machine parts, components and repair welding.
Welding processes (all common processes)
Welding equipment for every common process; recognized certified welding company according to DIN 18800 since 1981.
Sheet metal working, cutting and bending
Machine-based sheet metal working for constructions made of steel, stainless steel and aluminium.
Turning, drilling, milling
Manufacture of spare parts for machine repair and maintenance.
Location

Bad Rappenau
DEHeadquarters and production
- Part weight / size
- up to 5 tonnes piece weight
- Lot size
- Single and small series, custom-made products
- Materials
- Steel, stainless steel, aluminium
- Welding equipment for all common processes
- Machines for sheet metal working, cutting and bending
- Hall crane for piece weights up to 5 tonnes
- Own fleet of 7 vehicles
Components and Manufacturing Services




Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Construction and manufacture of tanks made of steel and stainless steelJoining | – | 10 m × 3 m × 3 m | 5 tonnes | – | Steel, Stainless steel |
| Manufacture of components, stairs, fall protection (welded constructions according to EN 14122)Joining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Construction and manufacture of doors and gates (T 30, smoke-proof, sound-proof, flood protectionJoining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Machine repairs / maintenance with repair weldingJoining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Turning of spare partsMachining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Drilling of spare partsMachining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Milling of spare partsMachining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Construction and manufacture of machine partsJoining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Welding work to orderJoining | – | – | – | – | Steel, Stainless steel, Aluminium |
| General assembly workAssembly | – | – | – | – | – |
| Static calculations and three-dimensional constructionsEngineering | – | – | – | – | Steel, Aluminium |
| Disassembly and repair of larger and smaller machines and systemsAssembly | – | – | – | – | – |
| Sheet metal working, cutting and bendingForming | – | – | – | – | Steel, Stainless steel, Aluminium |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Welding equipment for every common process | – | – | – | – | Bad Rappenau |
| Machines for sheet metal working, cutting and bending | – | – | – | – | Bad Rappenau |
| Hall crane | – | – | – | – | Bad Rappenau |
Additional services
Reference customers
Certifications
As a recognized certified welding company (DIN 18800) with a large qualification certificate and approval for welding of steel load-bearing structures according to DIN EN 1090-2, the company is qualified for demanding welded constructions. The approval as a certified company according to WHG §19 additionally permits work on systems that pose a hazard to water.
| Evidence | Bad Rappenau |
|---|---|
| Certified welding company according to DIN 18800 | |
| Welding of steel load-bearing structures according to DIN EN 1090-2 | |
| Certified company according to WHG §19 | |
| Large qualification certificate (since 1995) | |
| HP0 (on request) | |
| ISO 9001 |
History
- 1972
Founded by Heinz Künzel in Bad Rappenau
- 1981
Recognition as a certified welding company
- 1995
Receipt of the large qualification certificate
- 2007
Taken over by Alexander Künzel (second generation)