for sustainable development
Engine compartment – engine casings and sound deadening
In passenger cars' engine compartments, amongst others, the sound deadening of sheet metal parts is achieved by vibration damping via aluminium membrane absorbers. The multi-layer insulations are made from a shaped aluminium membrane and a bitumen film which expands when exposed to heat. On the production line the multi-layer insulations are fixed to the parts to be dampened before the car body is sprayed. The bitumen film swells in the furnace and bonds to the metal. Thus an effective vibration damping is achieved.