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: Processing apparatus for processing a workpiece surface in form of an internal coating of cylinder bores which are arranged in a row. The apparatus includes a shield unit which is provided to separate from one another—at least during operation—a part region of the workpiece surface provided for the processing and an adjacently arranged part region of the workpiece surface, whereby the shield unit has at least one blocking nozzle which is provided to generate a fluid flow for separating the at least two part regions, wherein the blocking nozzle is positioned such that the fluid flow flows along the workpiece surface and the blocking nozzle is directed to the part region between two cylinder bores.

Abstract: Processing apparatus and method for processing a workpiece surface, in particular for the internal coating of cylinder bores. Processing apparatus has a shield unit which is provided to separate from one another-at least during operation-a part region of the workpiece surface provided for the processing and an adjacently arranged part region of the workpiece surface. The shield unit has at least one blocking nozzle which is provided to generate a fluid flow for separating the at least two part regions.

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: Processing apparatus and method for processing a workpiece surface, in particular for the internal coating of cylinder bores. Processing apparatus has a shield unit which is provided to separate from one another—at least during operation—a part region of the workpiece surface provided for the processing and an adjacently arranged part region of the workpiece surface. The shield unit has at least one blocking nozzle which is provided to generate a fluid flow for separating the at least two part regions.

Abstract: The invention relates to a masking system for masking a cylinder bore (2) of a combustion engine (3) during a thermal coating procedure including a masking body (4) which can be placed during the thermal coating of a first cylinder (5) of the combustion engine (3) in the cylinder bore (2) of a second cylinder (7) to cover a cylinder wall (6) of the second cylinder (7). In this arrangement the masking body (4) is designed in such a way that a flow gap (10) of predeterminable breadth can be set between the masking body (4) and the cylinder wall (6) of the second cylinder (7) for the production of a flow (8) of a fluid (9).

Abstract: The invention relates to a masking system (1) for the masking of a crank chamber (2) of an internal combustion engine (3) during a surface treatment of a cylinder running surface (4, 41, 42) of a cylinder bore (5, 51, 52) of a cylinder (6, 61, 62) of the internal combustion engine (3). The masking system (1) includes a hollow masking body (7) with a connector segment (71) for the connection of the hollow masking body (7) to the cylinder bore (5, 51, 52) as well as a screen segment (72). In accordance with the invention, the hollow masking body (7) is configured such that the connector segment (71) of the hollow masking body (7) can be positioned on the cylinder bore (51) of the first cylinder (6, 61) at the crank chamber side during the surface treatment of a first cylinder (6, 61) of the internal combustion engine (3). The invention further relates to the use of a masking system (1) in accordance with the invention.

Abstract: The invention relates to a masking system for masking a cylinder bore (2) of a combustion engine (3) during a thermal coating procedure including a masking body (4) which can be placed during the thermal coating of a first cylinder (5) of the combustion engine (3) in the cylinder bore (2) of a second cylinder (7) to cover a cylinder wall (6) of the second cylinder (7). In this arrangement the masking body (4) is designed in such a way that a flow gap (10) of predeterminable breadth can be set between the masking body (4) and the cylinder wall (6) of the second cylinder (7) for the production of a flow (8) of a fluid (9).

Abstract: The invention relates to a masking system (1) for the masking of a crank chamber (2) of an internal combustion engine (3) during a surface treatment of a cylinder running surface (4, 41, 42) of a cylinder bore (5, 51, 52) of a cylinder (6, 61, 62) of the internal combustion engine (3). The masking system (1) includes a hollow masking body (7) with a connector segment (71) for the connection of the hollow masking body (7) to the cylinder bore (5, 51, 52) as well as a screen segment (72). In accordance with the invention, the hollow masking body (7) is configured such that the connector segment (71) of the hollow masking body (7) can be positioned on the cylinder bore (51) of the first cylinder (6, 61) at the crank chamber side during the surface treatment of a first cylinder (6, 61) of the internal combustion engine (3). The invention further relates to the use of a masking system (1) in accordance with the invention.