Abstract: The spray gun filter according to the invention for filtering liquid comprises a filter fabric and a filter support, which has outlet openings for the liquid and which surrounds the filter fabric from the outside.

Abstract: A method for mixing at least two liquid components of a two- or multi-component wet coating system, wherein a feed component under a first hydraulic pressure set at constant is fed discontinuously through a variable passage cross-section to a parent component under a second hydraulic pressure set at constant. An actual feed quantity of the feed component is detected and the feed quantity of the feed component is regulated with respect to a target feed quantity for the feed component in such a way that a timing cycle of the discontinuous feed and the passage cross-section for the feed component are influenced.

Abstract: The electrode holder for a powder spray gun operable at high voltage includes a powder channel and a web, arranged in the powder channel, for holding a high-voltage electrode. In addition, an annular groove arranged concentrically with the powder channel is provided and is open on the downstream side. A labyrinth for the high voltage is formed by the annular groove together with an annular web of a cap nut, the annular web protruding into the annular groove and said cap nut being used to lock the electrode holder.

Abstract: The reversible coating material nozzle for a spray gun for coating a workpiece with coating material can be installed in a first and a second installation position in a nozzle mount of the spray gun and comprises a nozzle core having a nozzle core opening and a nozzle nipple that is connected to the nozzle core and has a nozzle nipple opening. In addition, a nozzle channel for the coating material is provided and reaches through the nozzle nipple and the nozzle core and connects the nozzle nipple opening to the nozzle core opening. The nozzle nipple has a cylindrical portion, which in the first installation position forms a form fit with the nozzle mount of the spray gun. In addition, a stop is provided. The ratio between the length (L) from the stop to the cylindrical portion and the nozzle diameter (D) lies in the range between 0.75 and 2.00.

Abstract: The coating device according to the invention for a workpiece comprises a flow channel which has an opening for the workpiece, through which the workpiece protrudes at least partially into the interior of the flow channel during the coating. In addition, a spraying device is provided, which is arranged in such a way that coating material can be sprayed into the interior of the flow channel by means of the spraying device. Furthermore, the coating device comprises a flow generator, which is arranged and can be operated in such a way that the flow generator produces in the flow channel a flow (L1, L2) directed in the longitudinal direction (LA) of the flow channel.

Abstract: A method for mixing at least two liquid components of a two- or multi-component wet coating system, wherein a feed component under a first hydraulic pressure set at constant is fed discontinuously through a variable passage cross-section to a parent component under a second hydraulic pressure set at constant. An actual feed quantity of the feed component is detected and the feed quantity of the feed component is regulated with respect to a target feed quantity for the feed component in such a way that a timing cycle of the discontinuous feed and the passage cross-section for the feed component are influenced.

Abstract: The coating-powder-supply apparatus according to the invention comprises a powder-storage container, a powder conveyor, in order to convey powder out of the powder-storage container, and a set of scales, in order to weigh the powder located in the powder-storage container.

Abstract: The reversible coating material nozzle for a spray gun for coating a workpiece with coating material can be installed in a first and a second installation position in a nozzle mount of the spray gun and comprises a nozzle core having a nozzle core opening and a nozzle nipple that is connected to the nozzle core and has a nozzle nipple opening. In addition, a nozzle channel for the coating material is provided and reaches through the nozzle nipple and the nozzle core and connects the nozzle nipple opening to the nozzle core opening. The nozzle nipple has a cylindrical portion, which in the first installation position forms a form fit with the nozzle mount of the spray gun. In addition, a stop is provided. The ratio between the length (L) from the stop to the cylindrical portion and the nozzle diameter (D) lies in the range between 0.75 and 2.00.

Abstract: At the rear end, the powder cup spray gun has an injector, a powder cup and a receptacle for the powder cup. The powder inlet of the injector is connected to the receptacle. The powder cup and the receptacle are designed in such a way that the powder cup can be fitted into the receptacle. In addition, a grip with a connection for conveying air, a connection for atomising air, and a connection for metering air is provided. The connection for the conveying air and the connection for the metering air are connected to the injector via lines running in the grip.

Abstract: The wedge insert for a powder tube extension of a powder spray gun operable at high voltage comprises a sleeve, wherein the sleeve has a radial web, which is wedge-shaped on the upstream side. In addition, an axially running channel, into which a guide tube, which guides an electrode with a high voltage, can be inserted, is provided in the web.

Abstract: The coating-powder-supply apparatus according to the invention comprises a powder-storage container, a powder conveyor, in order to convey powder out of the powder-storage container, and a set of scales, in order to weigh the powder located in the powder-storage container.

Abstract: The electrode holder for a powder spray gun operable at high voltage includes a powder channel and a web, arranged in the powder channel, for holding a high-voltage electrode. In addition, an annular groove arranged concentrically with the powder channel is provided and is open on the downstream side. A labyrinth for the high voltage is formed by the annular groove together with an annular web of a cap nut, the annular web protruding into the annular groove and said cap nut being used to lock the electrode holder.

Abstract: The spray gun filter according to the invention for filtering liquid comprises a filter fabric and a filter support, which has outlet openings for the liquid and which surrounds the filter fabric from the outside.

Abstract: The coating-powder-supply apparatus according to the invention comprises a powder-storage container, a powder conveyor, in order to convey powder out of the powder-storage container, and a set of scales, in order to weigh the powder located in the powder-storage container.

Abstract: The method according to the invention for electrostatic coating of an electrically conducting workpiece with coating powder includes the following steps. The workpiece is earthed. Then an electrode has a negatives potential applied to it compared to that of the workpiece and a counter-electrode has a positive potential applied to it compared to that of the workpiece. The potential in the area of the workpiece in which the workpiece is to be coated is set to zero, by means of a control unit. Afterwards the workpiece is sprayed with coating powder in the area to be coated using a powder spray gun.

Abstract: A pumping device (1) by which fluids held in a reservoir tank (9) can be pumped to a spray gun (11) in a metered manner, with a piston rod (5) mounted in a housing (2) in axially movable fashion, with a reciprocating piston (25) attached thereto, with a piston (7, 8) connected to the piston rod (5) and moved between a first and a second housing sections (3, 4), first and second pressure spaces (21,21?, 22, 22?) enclosed with the two housing sections (3,4), two pressure lines (17, 17?) in each of the housing sections (3, 4) such that emerge into one of the pressure spaces (21, 21? or 22,22?), a working medium (19) pressed through pressure lines (17, 17?) alternately into a pressure space, by means of which the piston (7, 8) is driven, with a diaphragm a central area (14) connected to the piston rod (5), and its outer area (15) connected to the housing (2), and a flexible ring area (16) between the central and outer areas (14, 15), and a pumping space (20) enclosed by the diaphragm (12, 13) and the housing (2),

Abstract: The coating device according to the invention for a workpiece comprises a flow channel which has an opening for the workpiece, through which the workpiece protrudes at least partially into the interior of the flow channel during the coating. In addition, a spraying device is provided, which is arranged in such a way that coating material can be sprayed into the interior of the flow channel by means of the spraying device. Furthermore, the coating device comprises a flow generator, which is arranged and can be operated in such a way that the flow generator produces in the flow channel a flow (L1, L2) directed in the longitudinal direction (LA) of the flow channel.

Abstract: The device according to the invention for conveying fluid comprises a conveying chamber, an inlet valve, which is located in the direction of flow, upstream of the conveying chamber, and with an outlet valve, which is located in the direction of flow, downstream of the conveying chamber. Moreover, an injector is provided for, whose suction duct is connected with the conveying chamber. Via an air duct, which is connected to the conveying chamber, exhaust air (AL) can be blown into the conveying chamber.