Abstract: Method for coating components by thermal spraying, wherein not the entire surface of the component is to be coated and wherein those parts of the surface that are not to be coated are covered by masking before coating and wherein the covering is made by a paste processes at least in the areas of critical mask boundaries, i.e. by way of a paste dispensed from at least one nozzle, wherein the paste is a curable paste and curing is photo induced and preferably made by way of UV radiation, characterized in that the masking utilizes a partial masking step and a complementary masking step, the complementary masking step being performed at least in the area of critical mask boundaries and the partial masking step being performed in an area spaced from the area of critical mask boundary and the method of partial masking is not a paste process.

Abstract: A rotary feedthrough for the feedthrough of a powder-gas mixture from a stationary machine part into a rotating machine part, with a seal in the form of two flat circular-ring-shaped sliding seal surfaces arranged one on the other in a sliding manner, which sliding seal surfaces are arranged concentric to the axis of rotation of the rotating machine part and which can be moved apart from each other in the axial direction, so that they form a gap, wherein the seal is embedded in a purge chamber having at least one gas inlet and at least one gas outlet.

Abstract: The invention relates to a coating method for coating a curved surface (1), in particular a concave inner surface (1) of a bore wall or a cylinder wall (2), by means of a powdery coating material (3) by using a thermal spraying device, in particular a plasma spraying device (4) or a HVOF spraying device. A gun (6) is provided on a gun shaft (5) of the thermal spraying device (4) for generating a coating jet (7) from the powdery coating material (3) by means of an arc and the gun (6) is rotated about a shaft axis (A) of the gun shaft (5) at a predetermined rotation frequency (N), wherein the coating jet (7) for applying a coating (8) to the curved surface (1) is directed at least partially radially away from the shaft axis (A) towards the curved surface (1).

Abstract: The present invention relates to a method for coating components by thermal spraying, wherein not the entire surface of the component is to be coated and wherein those parts of the surface that are not to be coated are covered by masking before coating, characterized in that the covering is made by means of paste processes at least in the areas of critical mask boundaries, i.e. by means of a paste dispensed from at least one nozzle.