Method of producing weakened zones in shaped plastic parts by means of ultra sound cutting

摘要

A method is disclosed wherein weakened zones are provided in plastic trim parts in the from of cuts produced by means of an ultra sound cutting method, and wherein the cuts can be made suitably narrow and extending through the thickness of a multilayered plastic trim part in a manner that the cuts are without jagged edges and remain invisible on the visible side even when the cut extends though a decorative layer of the multilayered plastic part even after long term storage under heat.