Patent ID: 9657405
Date: 2017-05-23
CPC Classifications: B29C,B29K,C25D,F01D,F05D

Claim:
1. An assembly comprising: a removable mask; and one of a blade and a nozzle sector of a turbine engine, the blade and nozzle sector each including at least one airfoil and at least one platform and, respectively, a blade root and an attachment flange of the platform, the at least one platform having an outer surface connected via an edge to a peripheral surface of the platform, which peripheral surface is substantially perpendicular to the outer surface, wherein the removable mask comprises a peripheral rim covering the peripheral surface of the platform, the peripheral rim including a side surface connected at an inner end to an inner surface of the removable mask substantially transverse to said side surface, wherein the one of the blade and nozzle sector is adapted to be coated in an electrolytic deposit using an electrolytic substance, wherein the removable mask includes a cavity comprising a first cavity portion in which the at least one platform is engaged and which is defined by the side surface and the inner surface against both of which bears said at least one platform, so as to prevent the electrolytic substance from infiltrating between the removable mask and the platform, wherein the cavity further comprises a second cavity portion which accommodates one of the blade root and the attachment flange of the platform and which has a shape complementary to a shape thereof, wherein said one of the blade root and the attachment flange is engaged in the second cavity as a tight fit, and wherein said one of the blade root and the attachment flange has an undercut and the removable mask is made as a single piece of plastics material and is elastically deformable, so that removing the removable mask from said one of the blade root and the attachment flange requires elastically deforming the removable mask.