A changing device for coating media having a plurality of supply units each having at least one inlet connection, which can be connected to a reservoir for the medium, and an outlet connection, between which a flow channel extends. At least one coupling unit is present which has an input connection and an output connection, which can be connected to an application device, between which input connection and which output connection a through-channel (44) extends. The coupling unit is moveable relative to the supply units by a positioning device. The input connection can be coupled fluid-tight to the outlet connection of a supply unit. A valve device is present, in which each supply unit includes a valve unit which releases the flow channel in a released configuration and closes in a closed configuration and is controllable by a control signal in the released configuration. The valve device includes a control system, which has a switch device for each supply unit which allows the control signal through to the valve unit in a switched configuration and blocks the control signal to the valve unit in a blocked configuration, and has a trigger device which triggers at least one switching of the switch device from the blocked configuration into the switched configuration when the input connection of the coupling unit is to be coupled or is coupled fluid-tight to the outlet connection of a supply unit.

An installation for spraying a fluid comprising a fluid circulation circuit including a sprayer capable of spraying the fluid, a pump and a circulation pipe for the fluid, the pump being suitable for injecting the fluid into the circulation pipe, the circulation pipe being configured to guide the fluid from the pump to the sprayer, the installation further including at least one injector configured to inject a liquid separate from the fluid into the circuit, wherein the injector is configured to compare a total volume of liquid injected into the circuit to a predetermined volume, and to stop the injection when the total volume of injected liquid is equal to the predetermined volume.

A painting device includes a paint output part for outputting paint toward an object to be painted; an introduction pipe through which the paint flows and which introduces the paint into the paint output part; flowmeters placed outside the introduction pipe and measuring the flow rate of the paint in the introduction pipe; and a determination unit for determining whether the condition of the paint is normal on the basis of the result of measurement by the flow meters. The flow meter can be placed between an air motor and a valve. The flow meters can be placed downstream and upstream of the valve, respectively. The flow meters can be placed downstream and upstream of a joint, respectively. The flow meters can be placed downstream and upstream of a pump, respectively.

An inkjet coating machine is provided to prevent the components in the paint from precipitating. The inkjet coating machine includes: a robot arm having a chuck at a front end and a nozzle head unit detachably mounted on the chuck. The nozzle head unit includes a nozzle head having a nozzle for spraying the paint, a nozzle control unit for controlling driving of the nozzle, and a head-side circulation path enabling the paint to circulate within the nozzle head. The nozzle head, the nozzle control unit and the head-side circulation path are integrally configured. The coating machine further includes a standby holding unit that holds at least one nozzle head unit in standby and a head replacement unit that replaces the nozzle head unit.

The disclosure concerns a printhead for the application of a coating agent to a component, in particular for painting a vehicle body component with a paint. The disclosure provides that the printhead is designed in such a way that it enables a color change during coating operation and can be rinsed with a rinsing agent during a color change in order to rinse out coating agent residues from the printhead.

A feeding device for feeding coating and/or cleaning agents to a sprayer has an annular structure and includes an annular plate, a plurality of connection modules, a plurality of function modules and a plurality of inlet modules. Each connection module is removably mounted to bear against one side of the annular plate. Each function module is removably mounted on an outer face of a connection module. Each function module is fluidically coupled to the connection module onto which same is mounted. Each inlet module is removably mounted on an inlet face of a connection module. Each inlet module carries fluidic coupling elements accessible on a face of the inlet module, oriented opposite the connection module on the inlet face of which same is mounted.

The present disclosure belongs to the technical field of mechanical spraying, and a color change block with detection feedback as well as spraying equipment are provided. The color change block with detection feedback comprises a cleaning agent valve module, a color change micro valve module, a mixing pipe module and a turbidity detection module which are connected in sequence. A complete collinear common channel is formed among these modules, and the wall surface of the common channel is a complete plane. The turbidity detection module is further connected to the control module and used for monitoring the turbidity of a medium flowing through the common channel in real time so as to determine whether the medium in the common channel meets a cleaning requirement or not and feed a determination result back to the control module, and then the control module switches other media to form a closed-loop control.

The disclosure relates to a coating installation for coating components with a coating agent, in particular for painting motor vehicle body components, with a nozzle applicator, in particular a print head, with at least one nozzle for delivering a coating agent jet of the coating agent onto the component to be coated. The disclosure provides a device for preventing and/or detecting clogging of the nozzle.

The disclosure relates to a supply system for supplying multiple consumers with a substance to be applied, preferably paint, for application to motor vehicle bodies and/or add-on parts thereof. The supply system comprises a feed line, a return line, a first consumer device which comprises a first consumer, the first consumer being connected to the feed line and the return line and preferably forming a first consumer of the feed line in the flow direction of the substance to be applied, and a further consumer device which comprises a further consumer, the further consumer being connected to the feed line and the return line and preferably forming a last consumer of the feed line in the flow direction of the substance to be applied and/or being arranged after the first consumer in the flow direction of the substance to be applied. The supply system is distinguished in particular in that the feed line is connected to the return line via a connecting line. The disclosure relates further to an associated coating installation and to an associated supply method.

Apparatus for spraying a fluid, including a pipe, a scraper capable of moving in the pipe, and a casing defining a storage volume for accommodating the scraper in a position for storing the scraper, the scraper being configured to push fluid in front of it which is present in the pipe when the scraper moves in the pipe, the storage volume being in fluid communication with the pipe and being configured to allow the scraper to move between the storage volume and the pipe. The scraper includes a first magnet, and the casing includes a second magnet capable of exerting a first force on the first magnet to move the scraper from the storage volume to the pipe.