There are various ultrasound applications within this field. Assemblies need to be watertight and require a good surface finish, especially for lighting components. The welding of parts for the engine compartment has to meet superior mechanical requirements. Special multiple-head welders incorporating multiple resonator stacks are frequently used in this field.

APPLICATION EXAMPLES: Welding of lights, signalling elements, plugs, bulb holders, ball-grips, pushbutton parts, tanks, air ducts, dashboards and bumpers.