The coating machine is provided with an air motor (3), a rotational shaft (4) that is rotatably supported by the air motor (3), a feed tube (5) that extends to a tip end of the rotational shaft (4) through the inside of the rotational shaft (4), a rotary atomizing head (6) that is mounted to the tip end of the rotational shaft (4), and a shaping air ring (7) that surrounds an outer periphery of the rotary atomizing head (6) and an axial tip end of which is arranged in back of a paint releasing edge (6D) of the rotary atomizing head (6). The shaping air ring (7) includes a great number of first shaping air spurting holes (9), and a great number of second shaping air spurting holes (10). An inner diameter dimension (d1) of the first shaping air spurting hole (9) is set to be larger than an inner diameter dimension (d2) of the second shaping air spurting hole (10). The number (N2) of the second shaping air spurting holes (10) is set to be smaller than the number (N1) of the first shaping air spurting holes (9).

An electrostatic atomizer can include a paint supply path configured to supply paint to a paint discharge section; and a high voltage supply path configured to supply a high voltage to a discharge electrode, wherein the discharge electrode comprises a semi-conductive material, and wherein the high voltage supply path includes a high resistance near the discharge electrode, and is electrically segregated from the paint supply path.

Provided is a coating device capable of suppressing condensation from forming on a joint ring that connects a robot arm and a rotary atomization head. The joint ring 20 of this coating device 1 has an insulating member 23 which is positioned between a joint ring body 21 and a cover member 22, positioned so as to cover the joint ring body 21, and positioned so as to be separated from the cover member 22 by only a prescribed distance. In addition, the joint ring 20 is equipped with: a first chamber 230 that connects a first discharge port 212 and a second intake port 221, and is formed between the joint ring body 21 and the insulating member 23; and a second chamber 240 formed between the cover member 22 and the insulating member 23.

An electrostatic atomizer can include an applicator rotatably attached to a distal end of a turbine and a shaft; and an applicator washing component comprising a solvent fluid line configured to separately dispense a cleaning solvent to an external applicator surface by an external solvent line and an internal applicator surface by an internal solvent line, wherein the cup washing component is distinct from a coating fluid line.

A spindle device (10) includes a rotating shaft (12) having a plurality of turbine blades (11) provided in a circumferential direction, a housing configured to accommodate therein the rotating shaft (12), and a gas bearing (40) mounted to the housing (20) and configured to float and support the rotating shaft (12) to the housing (20) in a contactless manner by supply of a gas. The rotating shaft (12) is configured to be rotatively driven by jetting gas to the plurality of turbine blades (11). The plurality of turbine blades (11) overlaps the gas bearing (40) in an axial direction. Therefore, there is provided the spindle device having a flat configuration in which an axial length is short and capable of implementing miniaturization and weight saving.

A high rotation atomizer functioning with inner charging includes a high-voltage circuit which generates a high voltage that can be applied to a bell cup, from a low voltage. This high-voltage circuit includes a measuring resistor in a circuit path between the turbine casing of the turbine driving the bell cup and ground. A first measuring voltage can be tapped at this first measuring resistor, which voltage is a measure for the voltage applied at the turbine casing. A second measuring resistor is placed in a circuit path between the turbine casing and ground. A second measuring voltage is tapped at this resistor, which is likewise a measure for the voltage applied at the turbine casing. If the information gained from the two measuring voltages deviates too strongly from each other, then the control device triggers an error signal. By this means, the safety of the entire system is increased.

Exemplary coating methods and coating systems, e.g., for coating the component surface of a component with a coating agent by means of an atomizer in a coating system, for example to paint a body part of a motor vehicle with paint, are disclosed. An exemplary method comprises moving the atomizer over the component surface of the component to be coated, or moving the component in the spray jet, thereby applying the coating agent to the component surface by means of the atomizer. The atomizer may be operated with at least one electrical and/or kinematic operating variable comprising a certain voltage for the electrostatic charging of the coating agent and/or a certain rotational speed of a rotating spray element of the atomizer. In one example, the electrical and/or kinematic operating variable of the atomizer may be dynamically varied during the movement of the atomizer.

A current detection resistor is connected between an output terminal of a high voltage generator and an air motor. A coater current detector detects a coater current supplied to a coater based on a potential difference taking place on both terminals of the current detection resistor. The high-voltage control device serves to discriminate based on the coater current detected by the coater current detector whether the coater is caused to be close to a coating object. When it is discriminated that the coater is caused to be close to the coating object, the high-voltage control device outputs a shut-off signal for shutting off supply of the power supply voltage to the power supply voltage control device.

A rotary atomizing head (7) is provided with an outer peripheral surface washing passage (14) open onto anatomizing head outer peripheral surface (13) for causing wash fluid supplied from a feed tube (6) to flow out into an annular clearance (20) between the rotary atomizing head (7) and a shaping air ring (15). An outflow opening (14C1) of an outflow passage (14C) constituting the outer peripheral surface washing passage (14) is provided in a position closer to the backside into the annular clearance (20) by a length dimension (L1) than a front end surface (17A) of a front ring section (17) constituting the shaping air ring (15). Further, the outflow opening (14C1) opens to the annular clearance (20) in an angle (1) that is an acute angle to the atomizing head outer peripheral surface (13).

A turbine rotor, e.g., for a drive turbine of a rotary atomizer, is disclosed having a rotatably supported turbine shaft with the potential for mounting an atomizer wheel, and having at least one drive turbine wheel having a plurality of turbine blades. The turbine blades of the drive turbine wheel may be impinged on during operation by a drive fluid in order to drive the turbine rotor. The drive turbine wheel may be designed for the drive fluid to axially impinge on the turbine blades. A complete drive turbine having such a turbine rotor is also disclosed, as well as a complete rotary atomizer and individual exemplary components of the drive turbine.