What Is Powder Coating Equipment?
It is a type of coating equipment that helps in applying powder. Powder coating equipment does not involve solvents in its processes. The coating is carried out electrostatically and is then passed under heat, allowing the powder to flow and form a “skin “.It might be a thermoset polymer or a thermoplastic. Generally, it is used to give a difficult finish that will be harder compared to the conventional point which was formerly used. The main intent behind by using this equipment is for coating metals, such as for example bicycle parts, household appliances, aluminum extrusions, and many more.
Few advantages of powder coating are mentioned below:
– Emission Of Volatile Organic Compounds Are Reduced By Coating The Metals
– It Produces Much Thicker Coating As Compared To Traditional Liquid Coating
– It Can Be Recycled, Facilitating 100% Reusability Of The Substance
– Produces Less Hazardous Waste As Compared To Traditional Use Of Liquid
– Lesser Operating Cost Than Liquid Lines
Process Of Powder Coating
The Powder Coating Equipment work in following basic processes:
– Part Preparation Or The Pre-Treatment
– The Powder Application
Processes And Equipment Of Part Preparation
Prior to the powder coating process removal of lubrication grease, metal oxides, mud, oil etc are essential. There are various chemicals in addition to mechanical types of removing these substances from the metal surface. The strategy is dependent upon the performance requirement of the finished product. spray coating In the spray application process, chemical pre-treatments involve the use of chromates and phosphates. Phosphating and chromatin of the substrate occur in multiple stage. Bonding of the powder to the metal involves cleaning in the pre-treatment process. Sand Blasting is definitely another approach to preparing the outer lining prior to coating. It is used to supply finishing, etching, surface texturing and preparation, and degreasing for products made from wood, glass, or plastic. Different powder coating applications can require alternative types of preparation such as for example abrasive blasting prior to coating. The internet consumer market typically offers media blasting services coupled using their coating services at additional costs.
Commonly electrostatic gun or corona gun is useful for applying the powder coating to metal objects. Here, lets discuss the working of the electrostatic gun. A negative electric charge is imparted to the powder. The negatively charged powder is then sprayed towards the grounded object by mechanical or compressed air spraying equipment. It is then accelerated towards the workpiece by the powerful electrostatic charge. The thing is then heated, and the powder melts into a standard film and is then cooled to form a difficult coating. To reach more uniform finish preheating could help but problems can also be created as runs brought on by excess powder.
Tribo gun is the second type of gun that will be used to spray powder on metal surfaces. The powder is first charged by triboelectric friction and these charged powder particles then stick to the grounded substrate. It needs a different formulation of powder with respect to corona guns.
The fluidized bed method can also be useful for Powder coating. Initially, the substrate is heated and then it is dipped into aerated powder-filled bed. Later the powder sticks and melts to the hot object. Most dishwasher racks are coated with this process of coating.