US 11,806,744 B2
Method for decorating a mechanical part
Alexandre Netuschill, Le Cerneux-Pequignot (CH); and Fabien Bontaz, Sonvilier (CH)
Assigned to Comadur SA, Le Locle (CH)
Filed by Comadur SA, Le Locle (CH)
Filed on Apr. 13, 2020, as Appl. No. 16/846,719.
Claims priority of application No. 19193878 (EP), filed on Aug. 27, 2019.
Prior Publication US 2021/0060605 A1, Mar. 4, 2021
Int. Cl. B05D 1/32 (2006.01); B05D 5/06 (2006.01); G04B 19/10 (2006.01); G04B 37/22 (2006.01)
CPC B05D 1/322 (2013.01) [B05D 5/06 (2013.01); G04B 19/10 (2013.01); G04B 37/22 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for decorating at least one surface to be decorated of a mechanical part comprising:
taking the mechanical part to be decorated, on which at least one decoration element is sought to be produced according to a determined thickness and contour;
depositing, on the surface to be decorated of the mechanical part, a masking layer having a thickness that is at least equal to the thickness of the decoration element to be produced;
making, in the masking layer, an opening that coincides with the location on the surface to be decorated of the mechanical part where the decoration element is to be produced, the opening having a contour that is identical to the contour of the decoration element to be produced and defining a volume with the mechanical part to be decorated;
etching, through the opening made in the masking layer, a cavity in the surface to be decorated of the mechanical part, a geometry of a bottom of the cavity being different than a geometry of a top of the cavity at the surface to be decorated of the mechanical part so as to present means for anchoring the decoration elements of the filling material;
filling the volume delimited by the masking layer and the surface to be decorated of the mechanical part and the cavity by a filling material in which the decoration elements are sought to be produced; and
removing the masking layer,
wherein the cavity is delimited by a first vertical wall, a second vertical wall, and a third inclined wall, the first and second vertical walls being perpendicular to the surface to be decorated of the mechanical part, the means for anchoring the decoration elements of the filling material including a face of the third inclined wall progressively deviating from a bottom end of the second vertical wall as said third inclined wall moves away from said surface to be decorated of the mechanical part such that the face of the third inclined wall is inclined with a bottom end of the face of the third inclined wall intersecting a bottom end wall of the cavity which connects the bottom end of the face of the third inclined wall and a bottom end of the first vertical wall, the bottom end wall of the cavity being spaced apart from a rear surface of the mechanical part such that the means for anchoring does not extend entirety through a thickness of the mechanical part to the rear surface of the mechanical part.