Metal finishing

Organic and electrolytic anodisation.

With both anodising processes, aluminium components are given a special design surface so that your products have a premium character both visually and haptically.
We colour in natural aluminium, anthracite, medium bronze, bronze and black. In addition, an electrolytic bath is available for your special colour. You can give the materials an individual look and feel using numerous pre- and post-treatment methods.
Metal finishing

Types of anodised coatings.


  • Organic anodising
  • Electrolytic anodising
  • Partial anodising
  • Sub-eloxal/digital
  • Further procedures


The anodizing process first converts the surface of the aluminium into aluminium oxide using an electrochemical process.
This creates a fine-pored surface in which the colour particles are deposited. The material is then thickened by boiling water and thus offers excellent protection against mechanical damage, abrasion and weathering, without affecting the metallic character of the aluminium.




Electrolytic colouring uses colouring metal salts that are applied to the material in the anodising bath by means of alternating voltage.
In this process, the metal ions penetrate very deeply into the pores of the substrate. The intensity of the coating can be regulated by the duration of the process. The process offers significantly higher durability and resistance to external influences.




Anodised surfaces that must have conductive properties at certain points are anodised using our partial or selective anodisation process. By covering the areas that remain free, conductivity during the anodising process is ensured, which avoids cumbersome post-processing, e.g. by laser ablation of the anodised surface.




In this process, the material is first pre-anodised to create an open-pore anodised layer. Afterwards, colour pigments are deposited into these pores via a digital printer, hardened via UV light and cured via another anodised layer. In this way, the colour elements are firmly bonded to the aluminium component.

The advantages:

  • Customisable and realistic prints
  • Integration of any colours that can be reproduced by a digital printer
  • Unusual effects, e.g. colour gradients, neon colours or complex lines



Anodising of back-moulded components

We can anodise components that have already been back-moulded with plastic according to your requirements. We refine the back-moulded aluminium with various colours and finishes and can integrate light or sensors on request.


Alternative surface finishing techniques

Mechanical finishing

Powder coating

Laser, printing and etching technologies

Anodising colours

A variety of colours and textures.


  • Anodising Classic
  • Anodising Superior
  • Anodising Premium
  • Overview


Anodised surfaces
“Classic“

Surface texture: Without pre-treatment; polished
Appearance: Matt or glossy
Process: Optionally organically or electrolytically anodised
Produceable dimensions: 300 cm x 60 cm x 145 cm (LxWxD)
Quantity: 3 million pieces per year, including small parts
Post-treatments:

  • Printing
  • Sub-anodic printing (opt. digital printing)
  • Laser engraving
  • Laser inscription


Colour choice (organic):

  • Natural aluminium
  • Stainless steel look
  • Bronze
  • Anthracite
  • Black
  • Additional bath for individual colour

Colour choice (electrolytic):

  • Medium bronze
  • Anthracite
  • Black




Anodised surfaces
“Superior“

Surface texture: Grinded; brushed; brushed and grinded
Appearance: Matt or glossy
Process: Optionally organically or electrolytically anodised
Produceable dimensions: 300 cm x 60 cm x 145 cm (LxWxD)
Quantity: 3 million pieces per year, including small parts
Post-treatments:

  • Printing
  • Sub-anodic printing (opt. digital printing)
  • Laser engraving
  • Laser inscription


Colour choice (organic):

  • Natural aluminium
  • Stainless steel look
  • Bronze
  • Anthracite
  • Black
  • Additional bath for individual colour

Colour choice (electrolytic):

  • Medium bronze
  • Anthracite
  • Black




Anodised surfaces
“Premium“

Surface texture: Blasted
Appearance: Matt or glossy
Process: Optionally organically or electrolytically anodised
Produceable dimensions: 300 cm x 60 cm x 145 cm (LxWxD)
Quantity: 3 million pieces per year, including small parts
Post-treatments:

  • Printing
  • Sub-anodic printing (opt. digital printing)
  • Laser engraving
  • Laser inscription


Colour choice (organic):

  • Natural aluminium
  • Stainless steel look
  • Bronze
  • Anthracite
  • Black
  • Additional bath for individual colour

Colour choice (electrolytic):

  • Medium bronze
  • Anthracite
  • Black



Benefits

Advantages of anodisation.



Resistance

Scratch-, weather- and corrosion-resistant, antibacterial and UV light-resistant surfaces.

Customisation

Highly customisable designs for your products.

Hybrid

Ability to subsequently back-mould with plastic and to integrate light or sensor elements.

Variety

Various methods of pre- and post-treatment.

Integration ability

Smart surfaces with the possibility of integrating electronics and sensor technology.

Cleaning

Non-stick and fingerprint solutions.
Food-grade easy-to-clean surfaces.

Download brochure (PDF)

Further services

Cross elements of metal processing.

The anodisation of aluminium surfaces is one component of our entire service portfolio.
In addition, we fulfil the entire service supply chain – from toolmaking and metalworking to back injection with plastics, final assembly and logistics – all from a single source.
back injection moulding with plastics to final assembly and logistics – all from a single source.

  • Mechanical processing
  • Hybrid composites & bonding
  • Injection moulding
  • Toolmaking & assembly


Mechanical metal processing

Aluminium, sheet metal, stainless steel and steel:

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


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.


Details


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
Details


Plastic injection moulding

We manufacture a wide range of different products, including fan wheels and components as part of assemblies, in our own plastic injection moulding shop with machines up to 300 t clamping force.
We manufacture the corresponding moulds and injection moulding tools ourselves.


Details


Toolmaking
  • 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

Details


Asembly 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

Details

Your contact person for anodised surfaces.


Sales Management

Daniel Wolf



PHONE

+49 8071 9150


ADDRESS

Wilhelm Gronbach GmbH
Division Ventilation & Surfaces

Am Burgfrieden 2
D-83512 Wasserburg/Inn

Contact

Your request





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      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.

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