a lightweight component is equipped with two cover layers , which are made of a wood material , and a filling disposed in between the layers after cutting everything to size , having an edge support including thermoplastic material . the edge support is anchored in both the first and second cover layers starting from the narrow side . anchoring is achieved by bringing the edge support into contact with the respective cover layer and coupling mechanical vibrations into the edge support by a sonotrode engaging from the narrow side . the edge support at the same time is pressed against the cover layer such that , in the region of a transition between the thermoplastic material and the wood material of the cover layer , part of the thermoplastic material is liquefied and pushed into the cover layer material , thereby producing a positively engaged anchoring after hardening .