For large workpieces, it is not possible to prefabricate the heating furnace in the factory or repair the coating. The flame spraying method has a certain market. This method is to melt nylon powder through a high-temperature gas flame and spray it onto the surface of a preheated workpiece, then flatten it to form a film. This method requires the substrate temperature to be heated to 180 ℃ or above, so the surface construction efficiency is low and the operation is difficult to control. Generally, to avoid discoloration caused by local high surface temperatures, darker colored varieties are more suitable for construction.
