Method for producing a dimensionally stable inscription
View Patent ↗A three-dimensionally embossed inscription containing a plurality of interconnected letters is connected, for dimensional stability, to a holding frame during a manufacturing process via supporting elements. After the end of the machining and manufacturing processes, the inscription is separated from the holding frame and has a shape which corresponds to the connected shape on the holding frame.
1. A method for producing a dimensionally stable non-planar inscription having a plurality of letters interconnected along a specified longitudinal direction, the letters being formed of a plastic material and mountable on a non-planar surface of a motor vehicle, the method comprising the steps of:
injection molding a three dimensional plastic matrix that includes the inscription with opposite front and rear surfaces, at least the rear surface having a specified non-planar three-dimensional profile conforming to the non-planar surface of a motor vehicle, a planar holding frame extending continuously around a periphery of the inscription and spaced rearward of the rear surface of the inscription, and a plurality of supporting elements extending from the holding frame to locations on the rear surface of the inscription offset inward from an outer margin of the inscription and being at different respective positions along the longitudinal direction, the supporting elements have lengths corresponding to respective distances between the planar holding frame and the non-planar inscription, surfaces of the supporting elements facing outward on the matrix being sloped continuously from the inscription to a location between the holding frame and the inscription so that the supporting elements have a smallest cross-section adjacent the inscription;
chromium-plating the inscription supported on the supporting elements and the holding frame; and
separating the supporting elements from the rear surface of the inscription so that the inscription maintains the specified three-dimensional profile formed when injection molding the inscription with the supporting elements and the holding frame.
2. The method according to claim 1 , wherein the step of injection molding a three dimensional plastic matrix comprises providing the supporting elements extending from the holding frame to the individual interconnected letters of the inscription.
3. The method according to claim 1 , wherein the step of injection molding a three dimensional plastic matrix further comprises forming the inscription with at least two of the interconnected letters with interruptions along a line, and forming tie-up points of the supporting elements and the inscription directly adjacent to the interruptions, at free ends of the letters and in regions of long connecting webs between the letters.
4. The method according to claim 3 , wherein the step of injection molding a three dimensional plastic matrix further comprises forming the long connecting webs with changing cross sections.
5. The method according to claim 1 , wherein the step of injection molding a three dimensional plastic matrix further comprises forming the specified non-planar three-dimensional profile of the inscription with a greater height with respect to the holding frame in a middle region than outer end regions of the inscription, the rear surface of the inscription being configured to be fastened via adhesive on the non-planar surface of the motor vehicle exactly matching a shape of the rear surface of the inscription.
6. The method according to claim 1 , wherein the step of injection molding a three dimensional plastic matrix further comprises molding the supporting elements so that at least one of the supporting elements is at a position between two of the interconnected letters.