Industrial metal processing of medium and large series
Premium components from metals.
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.
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
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
Anodising
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 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.
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
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.
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
Tools
- 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
Smart
surfaces.
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.
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.
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.
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.”