| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high coating efficiency and a coating film thickness distribution to form a high smoothness coating film, and to save a coating material by forming an atomized gas powder binary layer flow by spraying a high-speed thin layer gas shear layer jet which crosses/collides with a high concentration powder flow to the powder flow and performing electrostatic coating. SOLUTION: By vibration by a vibrator 9 for introducing coating powder smoothly into a powder introduction means 4, and the like, most of powder 8 in a powdery coating container 7, becomes a cluster and bulky granules having a roughened/enlarged particle size distribution. The powder 8 is sucked up through a coating suction part 6 by the suction action of an injector 22 having a nozzle 20 and a throat 21. In this process, an atomized gas powder binary layer flow of atomized air 3 in which powder is atomized is formed, and when it passes through an atomization means 1, by a high speed thin layer gas shear layer jet 10 from ejection openings 2, the flow is ejected from a powder gun 36 in a booth 53, and electrostatic coating is applied to a substrate 40.
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