Professor of School of Engineering, Design and Built Environment, Western Sydney University, Australia. His research interests cover Industry 4.0, Additive Manufacturing, Advanced Engineering Materials and Structures (Metals and Composites), Multi-scale Modelling of Materials and Structures, Metal Forming and Metal Surface Treatment.
Manuscript received February 22, 2023; revised May 23, 2023; accepted May 30, 2023.
Abstract—The distance between the object and the spray gun and the degree of coating overlap due to the spray distance must be optimized for achieving a uniform coating using a spray gun. Moreover, the paint sprayed from a spray gun is thicker at the center of the object to be painted and thinner toward the edges due to the difference in density. Therefore, the thickness of the paint according to the spray distance should be considered. In this study, a Three-Dimensional (3D) painting robot specially designed to spray paint under certain conditions was used to investigate the spray characteristics of the spray gun and the thickness and glossiness of dry films according to the spray distance and moving speed. Under the standard coating conditions for automotive refinishing, the optimum distance between the object to be coated and the spray gun is approximately 12–15 cm, and the speed of the spray gun is about 0.4–0.5 m/s. If the spray distance is small, the coating film will be thick, and the resin ratio will be high, with metallic particles embedded in the resin, resulting in low glossiness. The metallic particles are exposed on the coated surface at a larger distance, increasing the glossiness.
Keywords—coating thickness, spray pattern width, spray distance, paintwork, spray gun, moving speed, 3D robot, gross
Cite: Woonsang Lee and Haeng Muk Cho, "Changes in Thickness and Gloss of Dry Films According to Spray Methods of Water-Soluble Metallic Base Coat," International Journal of Mechanical Engineering and Robotics Research, Vol. 12, No. 6, pp. 396-400, November 2023.
Copyright © 2023 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.
Copyright © 2015-2023 International Journal of Mechanical Engineering and Robotics Research, All Rights Reserved