A charge ring and fluid restriction arrangement for a paint spray tool. The paint spray tool has a charge ring that is moveable along the axis of the tool body. The paint spray tool also has interchangeable pre-orifices within the tool body.

An electrostatic atomizing coating apparatus and method incorporate a rotary head having a base portion, an open end and a plurality of grooves formed radially on an inner peripheral surface of the open end, an inside diameter of the rotary head increasing from the base portion toward the open end, and a motor configured to rotate the rotary head to discharge a thread-shaped paint. A voltage is applied to the rotary head so as to form an electrostatic field between the open end of the rotary head and an earthed coating target and to electrostatically atomize the thread-shaped paint discharged from the open end. Voltage output from the generator is controlled so as to adjust an intensity of the electrostatic field and to control a particle diameter of the electrostatically atomized thread-shaped paint.

A cylindrical shaping air ring provided on an outer periphery of a rotary atomizing head, includes an overhanging portion as an isolation means for isolating a second shaping air jetting unit from the air flowing around the shaping air ring.

An electrostatic coating machine can include an applicator rotatably attached to a distal end of a turbine and shaft, wherein the applicator is a bell cup comprising a resin material, wherein the bell cup comprises an outer peripheral edge and a bell cup exposed surface, wherein the outer peripheral edge comprises a conductive or semi-conductive coating material, and a plurality of semi-conductive members extending through the resin material in electrical communication with a high voltage path and the outer peripheral edge.

The disclosure relates to a cleaning device for cleaning an electrode assembly having a plurality of finger-shaped external electrodes for electrostatic external charging on an atomizer, in particular on a rotary atomizer. The cleaning device has a first cleaning chamber with an insertion opening for receiving one of the finger-shaped external electrodes of the electrode assembly during a cleaning process. The disclosure provides at least a second cleaning chamber having an insertion opening for receiving one of the finger-shaped external electrodes of the electrode assembly during the cleaning process, so that at least two of the finger-shaped external electrodes of the electrode assembly can be cleaned simultaneously during the cleaning process. Furthermore, the disclosure comprises a corresponding operating method for such a cleaning device.

The disclosure relates to a bell plate for a rotary atomizer for applying a coating agent (e.g. paint) to a component (e.g. motor vehicle body component). The bell plate according to the disclosure comprises a metallic base body and a transponder which can be read out wirelessly and is integrated in the bell plate. The disclosure provides that the transponder is arranged on the front side in the base body or is embedded in the outer outer circumferential surface of the bell plate, which facilitates the read-out of the transponder. Furthermore, the disclosure comprises a suitably adapted atomizer cleaning device having an antenna for reading out the transponder in the bell plate. Finally, the disclosure also comprises a correspondingly adapted operating method.

A coating apparatus can include a spray applicator configured to discharge a coating material toward a surface of a workpiece, wherein the spray applicator includes an air shaping orifice, and wherein the spray applicator is configured to generate an electric field between the spray applicator and the workpiece, and a positioning system configured to adjust a position of the spray applicator relative to the surface of the workpiece. It can further include a control system configured to regulate operation of the spray applicator and/or the positioning system to: maintain the spray applicator within a coating distance, maintain a flow rate of shaping air through the air shaping orifice, and maintain an electrical potential of the electric field.

A turbine for a fluid-spraying device including a turbine body, and a rotor rotating a bowl relative to the body about an axis, the rotor being surrounded by the turbine body in a plane perpendicular to the common axis, the turbine body guiding the rotation of the rotor, the rotor being rotated by a stream of gas, the turbine body receiving the stream of gas at the outlet of the rotor, and delimiting at least one outlet duct configured to guide a first portion of the received stream into a space delimited in a plane perpendicular to the common axis by the bowl and a skirt.

A rotary coating sprayer including a spray bowl rotating about an axis of rotation and an air turbine for driving the bowl. The turbine includes a rotor and a body forming a support for the rotor and defining at least one air feedline for a rotation chamber wherein the rotor blades are arranged. The feedline includes an intermediate chamber defined, radially to the rotation axis, between the body and a ring mounted around the body. In this way, lowering of temperature of an element of the sprayer housing due to flow of exhaust air from the turbine, is limited.

An electrostatic coating machine according to the present embodiments can reduce the risk of sparking even when setting a higher line speed than before when performing coating according to a proximity painting method. In the coating machine that performs electrostatic coating by use of a high voltage generated by a cascade, when a time constant is defined as the product of a total capacitance Co of the electrostatic coating machine and a bleeder resistor R1, the product of the total capacitance Co and the bleeder resistor R1 is set so that the time constant is 0.005 to 0.050.