Electrostatic coating device and system
AssigneeRansburg Industrial Finishing K.K.
InventorsOsamu Yoshida, Yoshiji Yokomizo, Naohiro Masuda
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Abstract
PROBLEM TO BE SOLVED: To evolve a spark discharge preventing effect of an electrostatic coating device. SOLUTION: One coating robot has an arm equipped with a plurality of electrostatic coating devices 100 close to each other and the plurality of the electrostatic coating devices 100 is connected in parallel with each other to one high-voltage generator 102. A hollow rotary shaft 108 driven by an air motor 104 is disposed with nine plate-shaped resistors 120 arranged circumferentially at intervals. The nine plate-shaped resistors 120 are connected in series and a high voltage is applied via the resistors 120 to a rotary atomization head 110. The rotary atomization head 110 is made of a semiconductive resin.
Claims21
An electrostatic coating system having an electrostatic coating device charging coating particles by applying to a discharge electrode a high voltage generated by a high-voltage generator controlled by a controller, the system comprising:
- a first high resistance;
- a second high resistance;
- and
- a coating device component made of a conductive material between the first and second high resistances, the first and second high resistances and the coating device component making up a high-voltage application path between the high-voltage generator and the discharge electrode,
- wherein the first high resistance and the second high resistance are connected in series,
- wherein the first high resistance is located on the side of the high-voltage generator,
- wherein the second high resistance is located on the side of the discharge electrode, and
- wherein a resistance value of the second high resistance is larger than a resistance value of the first high resistance.
An electrostatic coating device including a high-voltage generator for charging coating particles by applying a high voltage generated by the high-voltage generator through a high-voltage application path to a discharge electrode,
- wherein the high-voltage application path includes a first high resistance, a second high resistance, and a coating device component made of a conductive material between the first and second high resistances,
- wherein the first high resistance, the coating device component, and the second high resistance are connected in series,
- wherein the first high resistance is located on the side of the high-voltage generator,
- wherein the second high resistance is located on the side of the discharge electrode, and
- wherein a resistance value of the second high resistance is larger than a resistance value of the first high resistance.
An electrostatic coating device for charging coating particles by applying to a discharge electrode a high voltage received via a first high resistance from a high-voltage generator located outside, the device comprising:
- a high-voltage application path for receiving the high voltage via the first high resistance and applying the received high voltage to the discharge electrode via a coating device component made of a conductive material;
- and
- a second high resistance making up a portion of the high-voltage application path and disposed between the coating device component and the discharge electrode,
- wherein a resistance value of the second high resistance is larger than a resistance value of the first high resistance
Dependencies are inferred from the claim text.