| 摘要 |
An annular plasma spraying gun (100), according to the present invention, has an annular body (30) to spray plasma flame (14) toward a subject (70) to be treated from all directions while surrounding the subject (70) to be treated. According to the present invention, even though the subject (70) to be treated has a three-dimensional shape, such as a tube, a rod, a sphere, and the like, since spray coating is conducted toward the subject (70) to be treated from all directions, it is possible to coat the surrounding surface of the subject (70) to be treated while simply horizontally moving the spraying gun (100) or the subject (70) to be treated without making the spraying gun (100) revolve around the subject (70) to be treated or rotating the subject (70) to be treated when trying to coat the surrounding surface of the subject (70) to be treated, whereby desired coating can be performed on the surrounding surface of the subject (70) to be treated only by controlling the amount of coating powder to be supplied, the horizontal moving speed, and the like. In the related art, it is disadvantageous that there are many control variables for desired coating since variables for revolution or rotation are further included. |
