Aplicación: Coat sealing profiles with anti-squeak, lubricating and functional coatings
De qué se trata esta aplicación
In practice, solutions range from flexible manual workstations to indexed, robot-assisted series-production systems. The spray equipment, material supply and movement sequence must be suited to the coating material and the workpiece.
Functions of modern seal coatings
The application mainly concerns EPDM, TPE, rubber and other elastomer profiles. 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.
Typical requirements for the spraying process
Even small fluctuations in material pressure, viscosity, distance or movement control can change the coating visibly or functionally. Typical requirements include:
- uniform coating of continuously running profiles
- targeted application to sealing lips and contact zones
- adhesion to elastic surfaces that are difficult to wet
- Avoiding mist and material build-up
- stable quantity of material at changing line speed
- rapid cleaning for functional varnishes containing solids
Functional coatings on running profiles
Sealing profiles are often extruded continuously and then provided with anti-squeak, anti-stick, anti-freezing or low-friction coatings. Application must remain stable over long production periods and adapt to profile speed and geometry.
Depending on the profile, only individual lips, contact surfaces or the entire outer contour are coated. A too high layer can change the haptic and fit, a too low layer can impair the function.
- Synchronization with the profile speed
- targeted coating of sealing lips and contact surfaces
- low and uniform functional layer
- Avoiding bonding and material accumulation
- rapid cleaning during production interruptions
Krautzberger solutions for spray application and material supply
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 compact automatic spray guns, finely adjustable round or flat jet nozzles, material pressure vessels or pumps, agitators and material pressure controllers. The technically and economically suitable combination is selected for the specific medium, components and required production output.
Components, industries and fields of application
The application is used in different industries and component groups. Typical examples are:
- Door and window seals in the vehicle
- Body and flap seals
- Construction and facade profiles
- Industrial and appliance waterproofing
- Slide coatings for assembly processes
- anti-squeak and anti-freezing layers
Manual, partially automated or fully automatic
The apparatuses are positioned in such a way that only the functional contact areas are coated. Spray release, line speed and, if necessary, profile guidance are synchronized.
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.
Result for quality and economy
- even function over the entire profile length
- reduced friction and noise
- better mounting and usage characteristics
- Low material consumption due to local application
- Reproducible inline coating
- Flexible adaptation to profile cross sections
Tests with original material and sample components
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.
With original profiles wetting, bending, adhesion, friction behavior, line speed and drying are coordinated.
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.
Trials at the Krautzberger technical centre
At the Krautzberger technical centre, the process can be tested with the original medium and representative sample components. Conveyability, spray pattern, application quantity, material pressure, distance, movement and cleaning are coordinated during these trials.
The trials provide a reliable basis for selecting the spray gun, nozzle, material supply and degree of automation. Final functional and process approval is issued by the operator together with the material manufacturer.
Related products
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Contact for your application
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
Elastomer and sealing profiles need a thin coating that remains uniform along their length and accommodates movement. On vehicle components and sealing profiles for building elements, lubricating, non-stick or protective functions may also be required, depending on the application.
