Modern motor vehicle roof structures must have a smooth appearance and provide noise reduction. They can be fabricated of various materials, such as aluminum, steel, plastics or carbon fiber, which all require special consideration. Atlas Copco's advanced joining process knowledge can support your manufacturing process.
Roof panels are so large they need to be supported and dampened to reduce noise during car operations. Hot butyl or rubber-based adhesives between the inner skin and outer panel is a common solution.
The hem flange describes a mechanical joint design used for joining inner and outer panels, such as doors, hoods, bonnets or liftgates. Hemmed seams are also important for the sunroof assembly. To increase crash resistance and to prevent corrosion, the gap between the hemmed panels has to be precisely filled with high-strength adhesive.
The swirl application is a method to improve production quality in hem flange bonding. This application is getting increasing attention in the industry due to its ability to offer excellent material distribution and a more reliable process window. The swirl technology enables applications from a distance up to 50mm and therefore offers high flexibility within the process. Our SCA E-Swirl 2 AdX BIW is ideal for exactly such applications. This applicator can handle beads as well as fixed and constricted swirl applications to match complex car geometries.
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