The powder coating uses finely ground pigment and resin particles that are electrostatically charged and sprayed on electrical earth parts using a dry finishing process. There are two types of powder coating, including thermoplastic and thermosetting. Another method of applying powder coating, the fluidized bed method, is to heat the substrate and then soak it in an airy bed filled with dust. This method is generally used when the desired thickness of the coating should be more than 300 microns. The powder coating process eliminates overspray waste that can be experienced with solvent based paint.
This process allows the powder coating to adhere well to the material. A drying oven is often used to evaporate the remaining chemicals in the article. Automated dust coating lines use transport systems to transfer parts from phase to phase of the automated system.
Powder coating is like any paint application process, it has its advantages and disadvantages. We will discuss the pros and cons of powder coating later in this article. Without automatic dust guns and conveyor belts, batch systems can cost significantly less than automated systems. Automated transported systems are designed to operate at all times with minimal supervision, requiring less labor than batch booths, but higher initial costs. Employees are still required for both types of cabins to move products in and out of the paint area, even if spraying is automated. Regardless of which type of spray booth is added, a powder coating structure must be seamlessly integrated into a production line.
This individual coating takes less time to heal and you have your equipment ready for use quickly. More applications are being developed in the field of dust on plastics and dust on wood, in powder coating machine manufacturer particular medium density fiber boards. Continuous development of powder coating materials and new powder application methods promise even more applications that may be unimaginable today.
For plastic parts where the powder coating material is sprayed over a heated mold cavity, a molded powder coating process has been developed before the mold cycle begins. During the molding action, the powder coating chemically binds to the mold mass, resulting in a product with a chip and impact-resistant coating. In addition to spray applications with electrostatic pistols, powder coating materials can be applied using a immersion method called a fluidized bed. Edwin Gemmer developed the fluidized bed powder coating for applying thermoplastic resins and patented in 1953. Comparison of electrostatic paint vs. Powder coating processes are both based on similar concepts, with electrostatic paint using electrical charges to attach the paint to the metal.
Sandblasting removes all oxidation from the steel surface so that it rusts within hours when exposed to the right atmosphere. With this in mind, it is important that the product remains in a dry environment after sandblasting. In addition to the above-mentioned process, the part is sometimes electrocoating after the pre-treatment process, followed by the powder coating process.
These materials generally have low energy consumption, are hydrophobic and have a low humidity level that negatively affects the adhesion of the coating. Plasma treatment cleans, records and provides physically active adhesion sites for coatings to anchor. The result is a hydrophilic, wettable surface capable of flow and adhesion. When baked, the powder reacts with other chemical groups in the powder to polymerize, improving performance properties.
The powder coating is applied as a dry powder by means of an electrostatic process and then cured with heat. It is known for providing high-quality finishes in terms of functionality and overall appearance. To achieve the best results with your powder coating process, your product must be clean, dust-free, dirty, oil, rust, old paint or finishing material.