metal processing
of medium and large series


Premium components from metals.

Gronbach is a manufacturer of functional and design-oriented moulded parts made from aluminium, sheet metal, stainless steel and steel, with the highest demands of aesthetics, haptics and durability. Based on a wide range of pre-treatment and post-treatment methods as well as various surface finishing processes, new niche markets and target groups can be reached with metal as a material.
In particular, the long-term stable compliance with even the smallest dimensional tolerances distinguishes us as one of the leading metal processing companies in the premium sector.

Expertise in construction and manufacturing.

We process aluminium from the thinnest foil up to 5 mm thick sheets or even stronger extruded profiles and sometimes process stainless steel from 0.1-1 mm – using stamping to bending – to the required geometry, even for complex functional parts. In addition, we give them the desired look and feel using various finishing processes.
Other core competences are our cost-effective sheet metal processing using CNC and plastic injection moulding.

  • Mechanical processing
  • Surface finishing
  • Hybrid composites & bonding
  • Toolmaking & Assembly

Supplier sheet metal parts and formed parts from sheet metal, e.g. front panels for household appliances

Mechanical metalworking
from medium to large series

Aluminium, sheet metal, stainless steel and steel

  • Bending and forming
  • Turning (CNC), milling (CNC), sawing
  • Pressing with up to 500 t
  • Punching (with or without foil)
  • Grinding and polishing
  • Welding

Mechanical finishing

For the mechanical treatment of metal surfaces, we use the following manufacturing processes, among others:

  • Brushing
  • Grinding
  • Blasting
  • (Laser) polishing

Premium metal finishes by anodizing, powdering or lasering


We have a factory-owned anodising plant that can support you with the following finishing processes:

  • Organic or electrolytic anodisation
  • Partial / selective anodising
  • Anodising of already back-moulded components

In addition, various forms of pre- and post-treatment are possible, for example brushing, grinding, blasting, polishing, special pickling and lasering.


Powder-coated metal moldings and components

Powder coating

Using our own powder coating facility, we coat components with a choice of over 210 RAL colours, which we deliver just-in-time. For special requirements, we provide the surfaces for example with anti-stick or anti-fingerprint coatings.


Supplier, manufacturer metal screen printing process, laser etching, etching of metal surfaces

Laser, printing and etching technologies

For the visual labelling of functional components and other products, e.g. with logos, symbols or lettering, we use various processes for individual decorative and functional coatings:

  • Etching technologies
  • Screen and pad printing
  • Laser marking, laser engraving

Manufacturer of metal and plastic components joined together via back molding

Back-injection of metal and metal foils

For the required substructure of metal components and metal foils, we back-inject them with the required plastics.
We design and manufacture the plastic injection moulding tools required for this ourselves in order to avoid distortion due to shrinkage and different linear expansions. Furthermore, we integrate the desired electronics or lighting elements during back injection moulding.


Manufacturer assemblies plastic metal

Joining and bonding technologies

We join components using a wide variety of methods. In bonding, we use liquid adhesives, adhesive tapes and also adhesive die-cuts, which we apply manually or robotically. Optionally, different types of pre-treatment are possible, including plasma, primer, scarfing or pyrosil as well as different rapid curing methods (UV light, infrared, heat radiation).

  • 1C adhesives with manual and robot-assisted application
  • 2C adhesives in robot systems with high-end dispensing technology
  • Adhesive tapes with manual or robot-assisted application
  • Punched adhesive substrates with special systems for perfect positioning and pressing

Supplier toolmaking, toolmaker Bavaria

  • Embossing tools
  • Punching tools
  • Multi-cavity tools
  • Progressive dies
  • Injection moulds
  • Transfer tools
  • Forming tools for visible components
  • Devices for handling
  • Testing and measuring devices


Assembly and automation
  • Manual assembly
  • Partially automated assembly of small to medium quantities
  • Fully automated production of large quantities
  • Complete assembly lines incl. safety and function tests
  • Customised assembly lines


Professional support for your product or project along the entire value chain as a One Stop Shop

➀ Consulting

Along the entire value chain, we are available to you as a competent contact partner for your technical product or project – from initial consultation to common project completion.

➁ Construction and prototyping

In the specialist engineering department, we translate your drawing for the subsequent creation of a sample or prototype.

➂ Toolmaking

We then design and manufacture the required tools in our specialist toolmaking department.

➃ Parts production

Series production of, for example, CNC milled parts, CNC turned parts, extruded profiles and other precision parts.

➄ Surface finishing

As an option to the production of parts, we refine the product with various methods of pre- and post-treatment, for example via brushing, grinding, polishing and blasting as well as via the anodising process, powder coating and engraving.

➅ Back injection and integration of sensors

For the assembly of the component, the process of back injection moulding with plastics is suitable, in which we can additionally integrate light elements or sensor systems.

➆ Assemblies and mounting

Furthermore, for the production of assemblies, we combine components made of different materials, such as stainless steel, steel or aluminium with various plastics and mount them ready for installation.

➇ Packaging and logistics

After the industrial series production of the metal or plastic components, we are at your disposal regarding the packaging design and handover to our shipping department.

Manufacturer of smart metal surfaces controlled by sensors as well as integrating other elements such as light.


Perforated surfaces that enable the metal to “communicate“ using integrated light or sensor technology controls.
When switched off, both the elements and the perforated surface are invisible. Integrated effects, e.g. illuminated icons, logos, symbols or lettering, only become visible in the ‘on’ mode.
Service portfolio

Premium housings.

Housings or front and side panels can be adapted to a new look and feel using versatile anodised coating options and printing processes, so that a new premium segment can be created and a new target group opened up to our customers.

In addition, our innovative smart surfaces create lighting effects behind perforated metal surfaces as desired or equip them with individual sensor control.

Details on smart surfaces
Service portfolio

Surface finishing.

In a further stage of the value chain, we provide components with the desired surface colour and structure. In the area of colouring, we use powder coating and anodising processes, and in the area of structuring, we use mechanical treatment, screen and tampon printing, lasering and etching technologies.

Supplier anodized surface for aluminum Germany
Service portfolio

Highly automated production of assemblies.

After the development phase, we manufacture assemblies from different components and materials in series and prepare them for installation in our cost-effective plants. In addition to the development of assemblies, Gronbach’s core competencies lie in the connection of the individual components using our comprehensive bonding and joining technologies.
Final assembly is carried out manually, semi-automatically or fully automatically, depending on the assembly.
“Every year, 20 million assemblies leave our factory in Germany in a three-shift operation.”

Details on assemblies

Your contact for metal processing.

Key Account Management

Daniel Wolf


+49 8071 9150


Division Ventilation & Surfaces

Am Burgfrieden 2
D-83512 Wasserburg


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      • Order volumes
      • [
      • Requests from private individuals
      Order volumes

      Please take into account that our production is geared towards medium to large series production. We are therefore unable to process requests for very small quantities for economic reasons.

      Requests from private individuals

      We ask for your understanding that we cannot consider requests from private individuals of any kind.