Abstract: An emptying unit for powder bags used in powder spray coating facilities comprises a bag-receiving hopper which seats a powder bag and is narrower at its bottom than at its top to keep the powder bag dimensionally stable and in a position such that the bag aperture is situated in the upper bag end.

Abstract: Powder spraycoating facility. It is automatically switched between a first operating mode where only recovery powder is moved into an intermediate receptacle (24) and a second operating mode wherein only fresh powder from a fresh powder unit (70, 74) is fed to the intermediate receptacle (24). Preferably switching may be carried out from the second operating mode to a reserve powder operating mode when, following switching from the first operating mode to the second operating mode, an intermediate receptacle sensor (S1) continues to transmit a “powder needed” signal.

Abstract: A powder-level sensor unit comprises at least one sensor (102) of which the sensor measuring surface (108) is covered by a compressed air chamber (106). The compressed air chamber (106) is bounded on its side opposite the sensor measuring surface (108) by an air-permeable porous front wall (110). The front wall (110) is designed in a manner to be permeable to compressed air but impermeable to the spraycoating powder.

Abstract: A powder spraycoating apparatus includes at least one compressed-air outlet (8) connected to a source (14) of compressed air from which it receives compressed air (15) at such a rate and such pressure that the compressed air at the compressed-air outlet (8) shall detach the powder's rim layer from the powder duct (4) and shall concentrate the powder flow toward the radial flow center and make it swirl, at a site near the downstream end (6) of the powder duct (4).

Abstract: A coating-powder spray gun includes a gun housing (2) of which the front end face is sealed pressure-hermetically with respect to compressed gas by a front end wall (28). A current-limiting resistor (32) and at least a portion of a high-voltage generator (10) are potted in an integral electrically insulating block. The potted block may be received in the gun housing (2).

Abstract: A spray apparatus for coating material, in particular for coating powders, contains a spray outlet (4) spraying the coating material, a shaping air outlet (10) in the form of a plurality of holes (14) shaping the spray jet (8) and an ambient-air passage (50) radially configured between the spray outlet (4) and the holes (14) to aspirate ambient air by means of the flow suction effect of the spray jet (8) and/or of the shaping air flow (11).

Abstract: A spraycoating apparatus with a tubular, hollow affixation element (16) to affix an adapter (8) to a casing (2), a coating-material tube (14) running through the hollow affixation element (16) into the casing (2).

Abstract: A powder facility used for spray coating includes at least one injection unit (6), at least two powder stations (2) and at least one cleaning unit (16) which are mutually displaceably in program-controlled manner in order to alternatively convey powder from one of the powder receptacles of the powder stations or to clean the powder-flow itineraries using compressed cleaning air.

Abstract: A method of ensuring safety in operation of a coating apparatus includes the steps of measuring an instant value of a spray current, and regulating the spray current so that the spray current does not exceed a predetermined spray current limiting value by adjusting the high voltage applied to an electrode of the apparatus based on the measured instant value of the spray current. The spray current is directly measured in a return path of electrical current from the object to a regulating circuit of the apparatus.

Abstract: A spraycoating device at least one hollow high-voltage electrode (10) fitted with a compressed-air path (22) issuing from said electrode's end used to electrostatically charge the coating material. Preferably the high-voltage electrode (10) is a thin tube made of or comprising an electrically conducting material.

Abstract: A spray powder-coating apparatus fitted with an electronic control system (21) regulating the air flows (20, 43) to an injector (4) as a function of setpoints (m) for the rates of powder to be moved, and as a function of a setpoint (GV) for the total rate of air passing through the nozzle, by means of motor-driven adjustable throttles (18, 19, 44, 45), preferably also as a function of the actual values (89, 90) of the regulated air flows (20, 43).

Abstract: A coating-powder spray gun comprising a gun housing (2) of which the front end face is sealed pressure-hermetically with respect to compressed gas by a front end wall (28). A current-limiting resistor (32) and at least a portion of a high-voltage generator (10) are potted in an integral electrically insulating block. The potted block may be received in the gun housing (2).

Abstract: A spraycoating apparatus with a tubular, hollow affixation element (16) to affix an adapter (8) to a casing (2), a coating-material tube (14) running through the hollow affixation element (16) into the casing (2).

Abstract: Spray coating apparatus comprising a spray nozzle (2) and a regulation system (16) to limit the high voltage and to limit the current, further to measure the electric spray current of the high-voltage electrode (10).

Abstract: Spray coating apparatus comprises a spray nozzle (2) and a regulation system (16) which limits the high voltage at a high-voltage electrode (10) to a predetermined voltage value. The system also directly measures and limits the electric spray current of the high-voltage electrode (10) to a predetermined current value. The electric spray current is limited by adjusting the high voltage at the high-voltage electrode (10).

Abstract: A powder spraycoating apparatus comprising at least one compressed-air outlet (8) connected to a source (14) of compressed air from which it receives compressed air (15) at such a rate and such pressure that the compressed air at the compressed-air outlet (8) shall detach the powder's boundary layer from the powder duct (4) and shall concentrate the powder flow toward the radial flow center and make it swirl, at a site near the downstream end (6) of the powder duct (4).

Abstract: Coating-powder spray equipment comprising a regulator (22) for the total air rate in a total-air line (16) and one air-rate adjusting element (46) solely in one of the two lines “conveying-air line (36)” or “accessory-air line (40)”, the other of said two lines being devoid of any adjusting element.

Abstract: The invention relates to a powder facility used for spray coating and comprising at least one injection unit (6), at least two powder stations (2) and at least one cleaning unit (16) which are mutually displaceable in program-controlled manner in order to alternatively convey powder from one of the powder receptacles of the powder stations or to clean the powder-flow itineraries using compressed cleaning air.

Abstract: Powder spray coating equipment includes a spraying system (2), an injector (26) to pneumatically convey powder to the spraying system (2), and at least one flushing-air intake (73) to supply flushing compressed air into the air/powder path at a flushing-air supply site where the flow impedance to the flushing compressed air is less everywhere in the downstream direction through the spraying system (2) than in the upstream direction as far as through the injector (26) in order to drive flushing compressed air from the flushing air intake (73) through the air/powder path and out of the spraying system (2).