Chemical surface treatment, forming tool manufacture, special-purpose plant and vessel construction, and disposal logistics for industry
Weiss Unternehmensgruppe GmbH
Rednitzhembach · GrafenwöhrNew on Amplifa
A Pool of Specialists
Weiss Unternehmensgruppe GmbH pools expertise in metal chemistry, forming tool manufacture, plant engineering, vessel construction, plastics engineering, surface treatment, disposal logistics and medical technology through its subsidiaries DEWE Brünofix, Weiss Forming Tools, Preiss Anlagenbau and ELZI Entsorgungslogistik. DEWE Brünofix finishes metal surfaces by blackening, zinc and manganese phosphating and stainless steel colouring in computer-controlled, fully automatic contract treatment systems – from small screws to bearing rings for wind turbines – and distributes over 300 chemical products for degreasing, pickling, blackening, phosphating, corrosion protection and colouring. Weiss Forming Tools manufactures high-precision forming tools in steel and carbide using milling, EDM, turning, grinding and polishing with automated production. Preiss Anlagenbau, based in Grafenwöhr, builds special-purpose systems for heat and surface treatment, air-circulation furnaces, vessels in stainless steel and plastic up to 15,000 litres, and mixing and dosing systems. The group's companies serve a worldwide market with their products.
- Site
- Rednitzhembach
- Processes
- Blackening (chemical black colouring of ferrous steel and cast iron), Phosphating (zinc and manganese phosphating), Stainless steel colouring, Immersion in hot salt solutions (oxide conversion layer), Degreasing, Pickling, Corrosion protection, Colouring of metal (colouring agents)
- Materials
- Steel, Carbide, Stainless steel, Plastic, Castings (ferrous cast iron), Blackening, Phosphating, Stainless steel colouring
- Founded
- ca. 1905
- Employees
- ca. 140
- Industries
- Metal processing, Heat treatment shops, Electroplating/surface technology, Wind energy, Medical technology, Chemistry
- 01
Tool manufacture in steel and carbide (milling, EDM, turning, grinding)
- 02
Plant engineering for surface and heat treatment
- 03
Chemical contract treatment (blackening, phosphating, stainless steel colouring)
- 04
Vessel and plastics engineering
- 05
Hazardous waste disposal
Materials and Processes
Blackening
Chemical black colouring of ferrous steel and cast iron by immersion in hot salt solutions.
Phosphating
Zinc and manganese phosphating for surface finishing of steel and cast iron.
Stainless steel colouring
Chemical colouring of stainless steel with an oxide conversion layer for optical and technical requirements.
Steel and carbide
Materials for high-precision forming tools with the tightest tolerances.
Stainless steel and plastic
Material combination for special-purpose systems, vessels up to 15,000 litres and mixing and dosing systems.
Locations
Rednitzhembach
DEHeadquarters: DEWE Brünofix, Weiss Forming Tools, ELZI disposal logistics
- Lot size
- Small and smallest series up to large-scale series
- Materials
- Steel, cast iron, stainless steel, carbide
- Fully automatic, computer-controlled contract treatment systems
- Automated production cells for milling and EDM
Grafenwöhr
DEPreiss Anlagenbau: special-purpose plant construction for heat and surface treatment
- Lot size
- Single-unit and special-purpose production
- Materials
- Stainless steel, plastic
- Air-circulation furnaces (tempering/annealing)
- Surface treatment systems (manual, crane operation, compact and fully automatic)
Products and Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Blackening (chemical black colouring of ferrous steel and cast iron)Surface | – | – | – | small screws – bearing rings for wind turbines | Steel (ferrous), Castings |
| Phosphating (zinc and manganese phosphating)Surface | – | – | – | – | Metal (steel, cast iron) |
| Stainless steel colouringSurface | – | – | – | – | Stainless steel |
| Immersion in hot salt solutions (oxide conversion layer)Surface | – | – | – | – | Steel, Castings, Stainless steel |
| DegreasingSurface | – | – | – | – | Metal |
| PicklingSurface | – | – | – | – | Metal |
| Corrosion protectionSurface | – | – | – | – | Metal |
| Colouring of metal (colouring agents)Surface | – | – | – | – | Metal |
| EDMMachining | – | – | – | Small and smallest series – Large-scale series | Steel, Carbide |
| MillingMachining | – | – | – | – | Steel, Carbide |
| TurningMachining | – | – | – | – | Steel, Carbide |
| GrindingMachining | – | – | – | – | Steel, Carbide |
| PolishingSurface | – | – | – | – | Steel, Carbide |
| Tool manufacture for forming toolsEngineering | tightest tolerances | – | – | – | Steel, Carbide |
| Industrial heat furnaces (tempering, annealing, air-circulation furnaces)Heat treatment | – | – | – | – | Metal |
| Surface treatment systems (manual operation, crane operation, compact systems, fully automaticSurface | – | – | – | – | Metal |
| Vessel construction in plastic or stainless steel (up to 15,000 litres capacity)Plastics | – | – | – | – | Plastic, Stainless steel |
| Special-purpose plant construction / plant engineering (heat and surface treatment, paintEngineering | – | – | – | – | Stainless steel, Plastic |
| Mixing and dosing systems for liquid mediaPlastics | – | – | – | – | Plastic, Stainless steel |
| Drum, rotary, hanging and charging racks for electroplating and surface treatment systemsSurface | – | – | – | – | Steel |
| Welding (metal construction, plant engineering)Joining | – | – | – | – | Stainless steel, Steel |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Fully automatic contract treatment systems (computer-controlled) | – | – | – | – | – |
| Air-circulation furnaces (tempering/annealing) | – | – | – | – | Grafenwöhr |
| Automated production in milling and EDM (automation/production cells) | – | – | – | – | – |
Additional services
History
- ca. 1905
Roots of the group; the founding year of DEWE Brünofix dates back roughly 120 years.
- 2025
DEWE Brünofix celebrated its 120th anniversary with an in-house exhibition and ceremonial act as part of the group's summer festival.