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Powder coated bicycle frames and parts. The powder coating process was invented around 1945 by Daniel Gustin and received US Patent 2538562 in 1945. [4] This process coats an object electrostatically and then cures it with heat, creating a finish harder and tougher than conventional paint.
[citation needed] Many different mixtures of coating powders and D-gun settings can be used during detonation gun spraying of a material, all of which influence the final surface characteristics of the sprayed coating. Common powder materials used include but are not limited to: alumina-titania, alumina, tungsten carbide-tungsten-chromium ...
A powder feed stock is injected into the gas stream, which accelerates the powder up to 800 m/s. The stream of hot gas and powder is directed towards the surface to be coated. The powder partially melts in the stream, and deposits upon the substrate. The resulting coating has low porosity and high bond strength. [1]
The origins of the cold spray process go back to the beginning of the 20th century, when it was developed and patented by Thurston. [3] The process was further investigated by in the 1950s by Rocheville [4] [3] and was re-discovered in the 1980s at the Institute of Theoretical and Applied Mechanics of the Russian Academy of Science [5] and developed as a coating technology.
In a manual operation method the air-gun sprayer is held by a skilled operator, about 6 to 10 inches (15–25 cm) from the object, and moved back and forth over the surface, each stroke overlapping the previous to ensure a continuous coat. [7] In an automatic process the gun head is attached to a mounting block and delivers the stream of paint ...
Electrostatic coating is a manufacturing process that employs charged particles to more efficiently paint a workpiece. Paint, in the form of either powdered particles or atomized liquid, is initially projected towards a conductive workpiece using normal spraying methods, and is then accelerated toward the work piece by a powerful electrostatic charge.
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Limiting coating area is crucial in some applications, such as printing. "Roll-to-roll" or "web-based" coating is the process of applying a thin film of functional material to a substrate on a roll, such as paper, fabric, film, foil, or sheet stock. This continuous process is highly efficient for producing large volumes of coated materials ...