Abstract: A method for the production of an inherently stable self-supporting composite part for engine hoods for acoustic screening of noises. A prefabricated outer membrane blank part is cut and trimmed to form an outside sheet. This outside sheet is bonded to a prefabricated inside packing to form a self-supporting structure independent of the engine hood. The inside packing is provided with fastener elements and a removable protective film attached to an exposed surface of the packing. A primer is applied to the outside sheet of the self-supporting structure. A lacquer is applied to the primer and the protective film is removed.

Abstract: There is described a sound-insulating power vehicle part which includes a shaped outer sheet and an acoustically effective inside packing which together form an inherently stable lightweight composite part. To obtain this, a thermosetting plastic is used for the outer sheet while the inside packing is formed of a fiber-resin fleece, which is only slightly compacted in an acoustically effective main area and is closely compacted in its stabilizing areas.