Nagase Techno-engineering Co., Ltd.

Tsutomu Ueno

Katsuhiro Sato

An electrostatic coating device comprising a nozzle section that discharges a liquid to a substrate, a counter electrode that is disposed in such a way as to face the nozzle section and supports the substrate and a power source device that applies a voltage between the nozzle section and the counter electrode further comprises an instantaneous stop circuit that selectively grounds the nozzle section. When the nozzle section is grounded by the instantaneous stop circuit, a charge remaining in the nozzle section goes to the ground and the charge remaining in the nozzle section disappears. For this reason, after the power source device is turned off, dripping of the liquid from the nozzle section can be completed as quickly as possible.

Electrostatic coating device, power source device for electrostatic coating device and electrostatic coating method

An electrostatic application apparatuscomprises a tubular electrodeforming a first flow path Fwhose inner surface is formed of an electrically conductive wall; a counter electrodeplaced to block an extension of an axis line of the first flow path F; a power sourceapplying a voltage between the tubular electrodeand the counter electrode, and a liquid supply unitsupplying a liquid to the first flow path F. If an axial length of the first flow path Fis L1 and an inside diameter of the first flow path Fis D1, then L1/D1 is 35 or more, the inside diameter D1 of the first flow path is 0.5 to 2.0 mm, and the length L1 of the first flow path is 20 to 100 mm.

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Kanagawa, Japan

Tsutomu Ueno