Abstract: The invention relates to a method and apparatus for folding the projecting end of a covering or decorative layer over the edge of a supporting part, where at least the edge area of the supporting part is made of thermoplastic material and where at least one heatable punching element is provided, which can be applied to the folded-over end of the covering or decorative layer. The invention proposes that the projecting end of the covering or decorative layer be folded by a folding slide, which preferably is guided in a mold holding the supporting part, and which has openings or recesses for the passage of the at least one heatable punching element, which presses the covering or decorative layer at least point-wise into the edge area of the supporting part softened by the punching element.