Adhesive and sealant applications in the Paint Shop segment
Dominated by sealant applications, car manufactures all over the world try to eliminate the risks of corrosion that can affect visual appearance and create several quality problems. On top of that, premium vehicles need to deliver a quiet environment for their drivers and sound deadening materials use is on the rise.
Underbody Sealing (UBS)
The purpose of this application is the protection of the underbody of the vehicle from corrosion. Here, PVC-based material is applied by airless method which supports a wide spraying width and a relatively high application speed.
In this application a certain amount of mist is produced and overspray occurs on the edges. For other applications the mist and overspray would not be ideal, however here, the material is fairly low-priced and cosmetic demands are not as high.
The required application thickness is obtained by the combination of application speed and nozzle selection.
Seam sealing has established itself as an essential method in automotive construction because there is no other way of obtaining the required corrosion protection.
The most common application method for seam sealing is by using flatstream nozzles. Although this application can also be performed with E-Swirl technology which delivers a reliable sealing of seams in poorly accessible areas.
Fine seam sealing (FAD) was initially introduced for controlling body corrosion as early as the 1980s. After several development stages, the process became increasingly automated.
In addition to bead application and thin-jet spraying, the flatstream method with many different variant solutions (e.g., special nozzles) has proven itself to be the most flexible method.
In special cases, a seam can also be covered by E-Swirl that delivers a more attractive application result.
Automated insulation applications have been made possible by the advent of new materials. As a result: installing insulation matting, which was previously a typical manual operation, can now be automated conveniently.
Wide-slot nozzles cannot cover the full extent of insulating tasks inside a vehicle because the method can only be applied to rather flat areas, such as doors and hoods.
A precondition for sound-deadening automation inside the vehicle and on underbody was the availability of liquid-applied sound deadeners (LASD). Here again, the flatstream process can be applied, even with nozzles of a different geometry.