Patent ID: 9296134
Filing Date: 2016-03-29
CPC Classification: B29C,B33Y,B60N

Claim Text:
1. A method for producing a head restraint for a motor vehicle, wherein the head restraint has a lining and a foam material, wherein the foam material fills out the lining at least in regions, wherein the method has the following steps: producing a prototype mold, wherein the prototype mold comprises at least two mold parts, wherein the prototype mold, in an assembled state of the mold parts, has an inner surface pointing into the interior of the prototype mold and has an outer surface, the prototype mold is produced by a stereolithography process, a plurality of reinforcement ribs are formed on the outer surface of the prototype mold during the production of the prototype mold, the plurality of reinforcement ribs extends in a plurality of different directions, the plurality of reinforcement ribs are configured to reduce dimensional changes of the prototype mold and of the head restraint produced in the prototype mold during introduction of the foam material, and the shape of the head restraint produced in the prototype mold is determined by the inner surface and the outer surface of the prototype mold; producing the lining; assembling the mold parts of the prototype mold in such a way that the lining is arranged in the interior of the prototype mold; introducing the foam material into the interior of the lining, wherein the foam material is at least partially liquid at the time at which it is introduced.