Abstract: The invention relates to a powder supply device for a powder coating system having at least one powder container (24), which has a powder chamber (22), and having at least one powder dispensing device, which is connected or can be connected to a powder dispensing channel (13) opening into the powder chamber (22) via a powder dispensing opening (36), in order to extract coating powder from the powder chamber (22) during powder coating operation of the powder coating system. In order to achieve as homogeneous and effective a powder conveyance as possible using the powder supply device according to the invention, the at least one powder dispensing device is designed as a powder dense flux pump (4), in particular as a single-chamber powder dense flux pump (200).

Abstract: A powder supplying device for a powder coating installation with at least one closable powder container, which has a substantially cuboidal powder chamber for coating powder and a fluidizing device for introducing fluidizing compressed air into the powder chamber. At least one inlet opening is provided in a side wall of the powder container for feeding coating powder during a powder coating operation of the powder coating installation or for introducing cleaning compressed air during a cleaning operation of the coating installation. At least one outlet is provided for discharging fluidizing compressed air introduced into the powder chamber or for discharging cleaning air introduced into the powder chamber during the cleaning operation together with residual powder transported along with the cleaning compressed air. At least one powder feed line and at least one cleaning compressed-air feed line are connected via a diverter to the at least one inlet opening.

Abstract: A powder supplying device for a powder coating installation with at least one closed or closable powder container, which has a cuboidal powder chamber for coating powder. In order to quickly change the powder, one or more cleaning compressed-air inlets to which a compressed air source can be connected in a cleaning operation of the powder coating installation for removing residual powder from the powder chamber, in order to introduce cleaning compressed air into the powder chamber, is provided in a side wall of the powder container.

Abstract: The invention relates to a powder conveyor (100) having a pneumatically actuated dense phase powder pump (1) and a pressure controller (91). The dense phase powder pump (1) comprises at least one conveyor chamber (4) having a powder inlet valve (7) and a powder outlet valve (8). The pressure controller (91) can be used to adjust and maintain a set pressure on the at least one conveyor chamber (4) of the dense phase powder pump (1) that is or can be previously defined and/or to adjust and maintain an actuation pressure on the powder inlet valve (7) or the powder outlet valve (8) that is or can be previously defined.

Abstract: The invention relates to a method and a dense phase powder pump (1) for conveying coating powder from a first powder reservoir (101) to a second downstream powder reservoir or to a downstream powder spray-coating gun (102) or the like installation for spraying coating powder. In order to reduce the number of components of the dense phase powder pump (1) that require maintenance, the dense phase powder pump (1) is designed as a single-chamber dense phase powder pump and has only a single powder conveyor chamber (4) for conveying coating powder.

Abstract: An oscillator (100) for providing an oscillating voltage for a powder spray coating device (200) is specified. With the aim of improving operational safety, the oscillator (100) as claimed in the invention has a first signal generator (10) for generating an intermediate circuit voltage (11), a second signal generator (20) for generating a modulation signal (21) and a modulation signal isolating element (61), connected to the second signal generator (20), while a first voltage monitoring device (60) is also provided, designed for continuously measuring the oscillator voltage (34), comparing it with at least one specified or specifiable oscillator voltage reference value and, if a first comparison criterion is satisfied, outputting a modulation isolating signal (80) to the modulation signal isolating element (61).

Abstract: A powder feed apparatus for a powder spraycoating equipment includes a dense phase powder pump fitted with at least one, or two feed chambers. Each of the feed chambers includes at one chamber end a powder intake valve and at the opposite chamber end a powder outlet valve and further includes at least one air exchange aperture to alternatingly apply compressed conveying air or a partial vacuum to the feed chamber. The apparatus further includes an integral structural block. The structural block includes the feed chambers and first control valves connected in fluid communication to at least one of feed chambers for the purpose of applying compressed conveying air and a partial vacuum to it. The first control valves are directly connected, in fluid communication via ducts constituted in the structural block, to at least one of the feed chambers.

Abstract: A control device for a powder spray coating device and a powder spray coating device are specified. With the aim of ensuring operational reliability during the coating operation of the powder spray coating device, while at the same time preserving the required coating efficiency, the solution according to the invention provides for the control device an assessment device, an enabling device and a first communication interface, the assessment device being designed for assessing on the basis of at least one code received from the powder spray coating device by means of the first communication interface whether or not reliable operation of the powder spray coating device is ensured and passing on the assessment result to the enabling device, the enabling device being designed in turn for enabling operation if the assessment result is positive.

Abstract: An oscillator (100) for providing an oscillating voltage for a powder spray coating device (200) is specified. With the aim of improving operational safety, the oscillator (100) as claimed in the invention has a first signal generator (10) for generating an intermediate circuit voltage (11), a second signal generator (20) for generating a modulation signal (21) and a modulation signal isolating element (61), connected to the second signal generator (20), while a first voltage monitoring device (60) is also provided, designed for continuously measuring the oscillator voltage (34), comparing it with at least one specified or specifiable oscillator voltage reference value and, if a first comparison criterion is satisfied, outputting a modulation isolating signal (80) to the modulation signal isolating element (61).

Abstract: The invention relates to a screen insert (70) for a powder container (24) of a powder supplying device, the screen insert (70) having a screen unit (71) for screening coating powder and an ultrasonic transducer (72) for generating ultrasonic vibrations. The screen unit (71) is connected to the ultrasonic transducer (72) in such a way that the ultrasonic vibrations generated by the ultrasonic transducer (72) can be transferred to the screen unit (71). To allow a particularly compact construction of the screen insert (70) to be achieved, according to the invention a screen carrier (73) which can be placed onto the powder container (24) is provided, for holding the ultrasonic transducer (72), with the screen unit (71) connected thereto, in such a way that the screen unit (71) is arranged below the screen carrier (73), so that the screen unit (71) is inside a powder chamber (22), formed by the powder container (24), when the screen carrier (73) has been placed onto the powder container (24).

Abstract: A powder spraycoating method and powder spraycoating equipment. A dense phase powder pump is used. According to a predetermined conveying-air function in a control unit, different rates of compressed conveying air can be defined for different powder rates. In one predetermined total-air function in the control unit, the sum of total-air rate composed of the rate of compressed conveying air and of the rate of supplemental compressed air can be kept constant even if the rate of compressed conveying air changes.

Abstract: An electronic spraycoating control device for implementing spraycoating methods includes at least one manually driven program selecting element for selecting programs from two different groups of programs. The electronic spraycoating control device further includes a plurality of manually driven parameter setting elements and display units to automatically display the adjusted parameter references values.

Abstract: The invention relates to a powder supplying device for a powder coating installation with at least one powder container, which has a powder chamber for coating powder, and with at least one powder injector, which is connected or can be connected to a powder discharge channel opening out via a powder discharge opening in the powder chamber, in order to suck coating powder out of the powder chamber in the powder coating operation of the powder coating installation with the aid of conveying compressed air fed by the powder injector. In order to make it possible for the powder to be changed quickly in an easy manner, it is provided according to the invention that the powder discharge channel has a reduced length of at most 300 mm, preferably a length of 160 mm to 240 mm and more preferably a length of 200 mm.

Abstract: A coating powder feed method, coating powder feeding device, electrostatic powder spraycoating apparatus containing such a coating powder feeding device. The invention includes a dense phase powder pump fitted with at least one feed chamber. A control signal to create a partial vacuum in the feed chamber is generated no earlier than simultaneously with, preferably by a predetermined delay time after, a control signal opening a powder intake valve of the feed chamber, as a result of which the beginning of partial vacuum buildup in the feed chamber shall take place no earlier than simultaneously with the initial opening of the powder intake valve or by a defined time delay after the opening of the powder intake valve.

Abstract: A powder supplying device for a powder coating installation with at least one closable powder container, which has a substantially cuboidal powder chamber for coating powder and a fluidizing device for introducing fluidizing compressed air into the powder chamber. At least one inlet opening is provided in a side wall of the powder container for feeding coating powder during a powder coating operation of the powder coating installation or for introducing cleaning compressed air during a cleaning operation of the coating installation. At least one outlet is provided for discharging fluidizing compressed air introduced into the powder chamber or for discharging cleaning air introduced into the powder chamber during the cleaning operation together with residual powder transported along with the cleaning compressed air. At least one powder feed line and at least one cleaning compressed-air feed line are connected via a diverter to the at least one inlet opening.

Abstract: A powder feed apparatus for a powder spraycoating equipment includes a dense phase powder pump fitted with at least two feed chambers, alternatingly discharging coating powder. Each feed chamber includes a powder intake valve to aspirate coating powder during a suction stage and one powder outlet valve to discharge coating powder during a discharge stage. Each feed chamber further includes control valves to operate the dense phase powder pump and a control unit controlling the dense phase powder pump by the control valves. A dependence mode of the total open time (ttotal) of the powder intake valves defines the dependence of the total open time (ttotal) on an adjustable nominal value (mp) adjusted by a powder adjusting element and relating to the rate of powder to be conveyed by the dense phase powder pump, and defining a response delay time (tdelay) and an apparatus constant (C).

Abstract: The invention relates to a jet-receiving nozzle for a powder-delivery injector with an arresting region on the injector side and a connecting region remote from the injector, the arresting region having a configuration preventing incorrect connection. The invention also relates to a powder-delivery injector for delivering a powder-air mixture, the powder-delivery injector having an accepting channel for accepting a jet-receiving nozzle.