Electrostatic spraying method and electrostatic spraying device suitable for use in the electrostatic spraying method

摘要

To provide an electrostatic spray method capable of suitably coating an inside surface with a liquid when coating the coating object being cylindrical and having through-holes with the liquid in a longitudinal direction and being formed with the plurality of through-holes penetrating from an outside surface to an inside surface stipulating the through-holes on a side wall.SOLUTION: An electrostatic spray method capable of suitably coating an inside surface with a liquid when coating the outside surface of a coating object 50 being cylindrical and having through-holes 50H in a longitudinal direction with the liquid and being formed with the plurality of through-holes penetrating from an outside surface to an inside surface stipulating the through-holes 50H on a side wall includes: a step arranging the attraction electrodes 30 of an electrostatic spray device 10 in the through-holes 50H of the coating object 50; and a step spraying the liquid to the coating object 50 by applying a voltage generating an electrostatic force spraying the liquid from a nozzle 22 only with the electrostatic force between the coating object 50 and a liquid spray part 20 having the attraction electrodes 30 and the nozzle 22 of the electrostatic spray device 10 while keeping the coating object 50 and the attraction electrodes 30 in a same potential.SELECTED DRAWING: Figure 1