The application of aluminum castings: Aluminum materials and aluminum alloys have good fluidity and plasticity, making it possible to make various complex and difficult shaped castings. Castings made of aluminum alloys and metallic aluminum have high accuracy and surface smoothness, which greatly reduces the mechanical processing volume of castings, greatly reduces labor intensity, and saves electricity and metal materials.
Due to its high internal and external quality, aluminum castings are widely used in various industries such as automotive manufacturing, internal combustion engine production, motorcycle manufacturing, electric motor manufacturing, transmission machinery manufacturing, precision instruments, landscaping, and power construction.
The electrostatic spraying of aluminum castings is a spraying method that uses a high-voltage electrostatic field to make negatively charged coating particles move in the opposite direction of the electric field, and adsorb the coating particles on the surface of the workpiece. The electrostatic spraying equipment consists of a spray gun, a spray cup, and a high-voltage power supply for electrostatic spraying.
Usually, a thicker coating can be obtained in one application. With ordinary solvent coatings, it takes about 4-6 applications, while with powder coatings, this thickness can be achieved in one application. The corrosion resistance of the coating is very good. Powder coatings do not contain solvents and are free of three wastes, improving labor hygiene conditions.
Adopting new processes such as powder electrostatic spraying, it has high efficiency and is suitable for automatic assembly line painting. The powder utilization rate is high and can be recycled. In addition to thermosetting epoxy, polyester, and acrylic, there are also a large number of thermoplastic and grease resistant coatings that can be used as powder coatings, such as polyethylene, polypropylene, polystyrene, fluorinated polyether, nylon, polycarbonate, and various fluorinated resins.