Application: Coat housings with protective, functional and decorative coatings
What this application is about
Various wet-spray processes are suitable for industrial application. Depending on the medium, component geometry, batch size and quality requirements, application can take place with a manual paint spray gun, a coating gun, an automatic spray gun or within a painting and coating system.
What the coating must achieve in the process
The application mainly concerns steel, aluminium, plastic, magnesium and composite materials. The required effect occurs only when coating material, substrate, layer thickness and subsequent drying or curing fit together. The spraying process must therefore be adapted to the concrete material system and the real production conditions.
Alongside surface quality, material consumption, cleaning effort, system availability and reliable repeatability also matter. A sound technical solution therefore combines controlled atomisation with a stable material supply that is easy to regulate.
Challenges in spray application
Even small fluctuations in material pressure, viscosity, distance or movement control can change the coating visibly or functionally. Typical requirements include:
- even coverage of edges, recesses and breakthroughs
- Avoidance of runs on vertical surfaces
- optically uniform spray pattern on visible sides
- different substrate and primer requirements
- Masking of sealing and contact surfaces
- economical color change in variant production
Considering edges, openings and internal areas
Housings often have holes, vents, recesses and sharp edges. The spray paths shall be guided in such a way as to ensure uniform coating of visible surfaces without unnecessarily flooding interiors or functional surfaces. In the case of two-part housings, care must also be taken to fit and seal surfaces.
Depending on the material, the coating performs decorative, corrosion-protective, chemical or electrical functions. The nozzle selection depends on size, geometry and desired layer.
- Edge and corner cover
- Masking of threads, contacts and sealing surfaces
- even optics on large areas of view
- controlled partial coating of interior areas
- Flexible mounting of different housing variants
Krautzberger application technology for this application
Krautzberger treats application and material supply as a connected system. Depending on the task, manual and automatic spray guns, suitable air and material nozzles, material pressure tanks, diaphragm pumps, pump and lifting stations, and material pressure regulators can be combined.
In automated processes, spray guns can be integrated into mounts, lifting devices, axes or robots. Material changeover valves and flushing equipment support applications with several colours or media. The specific selection depends on viscosity, solids content, application quantity, cycle time and component geometry.
For fine surface finishes, various XLINE nozzle combinations and spray patterns are available. With highly viscous, abrasive or sedimenting media, sufficiently large flow cross-sections, suitable material combinations, agitators and pressure-stable delivery become more important.
The focus is on manual paint spray guns, compact automatic spray guns, robot adapters, material pressure vessels or pumps, material pressure controllers and material change technology. The technically and economically suitable combination is selected for the specific medium, components and required production output.
Typical components and areas of application
The application is used in different industries and component groups. Typical examples are:
- Electronic and device housings
- Machinery cladding and control cabinets
- Automotive and transport components
- Household appliances and operating housings
- medical and analytical equipment
- Design housing and consumer goods
From manual application to automated installation
For variants and small lots, the manual workstation remains flexible. For serial components, robots, rotary machines or fixed spray stations enable reproducible motion sequences and defined cycle times.
In addition, component feed, extraction or ventilation, cleaning, media change and accessibility for maintenance work must be taken into account during the system integration. This keeps the process stable not only in the pattern run, but also in everyday production.
Advantages of a coordinated spray solution
- Uniform protective and visual surfaces
- good coverage of complex geometries
- Flexible processing of primer, base and top coat
- fast adaptation to variants and colors
- reduced overspray with coordinated nozzle technology
- Integration into manual and automated lines
Application trials at the Krautzberger technical centre
Liquid media and coating materials with similar names can differ considerably in viscosity, solids content, solvent base, wetting and drying. A reliable choice of spray gun, nozzle and material supply should therefore be made using the original material and a representative component.
Sample housings show at an early stage whether edges, recesses and shadow zones with the intended apparatus position are safely reached.
On this basis, the spray pattern, material quantity, pressure, distance, movement and cleaning sequence can be defined. The result is an application solution suited to the medium, the geometry and the intended production process.
Related products
All products
Matching solution for your process
Looking for a spray gun, an automatic spray gun or a complete material supply for this process? Krautzberger helps you select and design suitable spray technology, nozzle configurations, delivery and regulation.
Contact Krautzberger to discuss your medium, component, production volume and desired result. Together, we assess how the process can be implemented safely and economically.
Industries for this application
Housings range from simple covers to complex molded parts. Depending on the material and application, they need protection against external influences or a particular look and feel – requirements that differ from industry to industry.
