A line appears in the center of the large object. The occurrence of boundaries is suppressed by the overlap width of the gun and the time for applying the paint.
In the center of the large surface, a faint line can be seen. Even though the color is the same, why does a boundary appear? ────────────── ■Cause of Occurrence Surfaces that cannot be painted in one go are painted in multiple layers. If you overlap after the previously painted side starts to dry, there will be a difference in film thickness and gloss. ■Truth The allowable time for overlapping paint is short, ranging from several seconds to a few minutes, and varies by season. When the overlap width of the spray gun falls below half, the film thickness at the boundary becomes thinner. The line is only visible from an angle, so it can be overlooked during a frontal inspection. ■Improvement Measures Ensure that the overlap width of the spray gun is 50 percent and maintain a constant operating speed. Decide the overlapping position in advance and paint continuously in the same direction. Please utilize the materials on the painting procedure for large items.
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basic information
Corresponding construction method: solvent-based baking paint, powder coating / Gun overlap width: 50 percent / Coating joint: unified direction, fixed position / Film thickness: 20-40 microns / Maximum compatible dimensions: 2000mm / Inspection: appearance check by oblique light
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Metal powder coating for large parts such as construction machinery covers, industrial machinery frames, building material panels, and furniture tops. We have a track record of standardizing gun operation conditions as a measure to address appearance complaints related to paint seams.
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We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.
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