Patent ID: 8597446

Claim:
A method for fastening an edge to a lightweight component having two cover layers and a filling arranged between the cover layers, the method comprising the following method steps: providing an edge support comprising a thermoplastic material; anchoring the edge support in both cover layers, wherein the step of anchoring comprises the sub-steps of: bringing the edge support into contact with the respective cover layer, coupling mechanical vibrations into the edge support by a sonotrode acting from the narrow side, pressing, while the mechanical vibrations are coupled into the edge support, the edge support against this cover layer in such a way that, in the region of an interface between the thermoplastic material and the cover layer, part of the thermoplastic material is liquefied and forced into the cover layer, by which means a positively engaging anchorage is obtained after hardening of the thermoplastic material; the method comprising the further steps of: carrying out or repeating the step of anchoring until an extended region of the narrow side is provided with the edge support or with a plurality of edge supports; fastening an edge to an outer surface of the edge support in such a way that, in said extended region, the intermediate space between the cover layers is closed toward the narrow side.