What Is Powder Coating Equipment?
It’s a kind of coating equipment that helps in applying powder. Powder coating equipment doesn’t 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 tough finish that is harder compared to the conventional point that has been formerly used. The key purpose of by using this equipment is for coating metals, such as bicycle parts, household appliances, aluminum extrusions, and many more.
Few benefits 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
Ahead of the powder coating process removal of lubrication grease, metal oxides, mud, oil, etc are essential. There are numerous chemicals along with mechanical methods of removing these substances from the metal surface. The strategy depends upon the performance requirement of the finished product. In 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 can be another way of preparing the surface just before coating. It’s used to offer finishing, etching, surface texturing, and preparation and degreasing for products made from wood, glass, or plastic. Different powder coating applications can require alternative methods of preparation such as abrasive blasting just before coating. The web consumer market typically offers media blasting services coupled using their coating services at additional costs.
Commonly electrostatic gun or corona gun is used 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’s then accelerated towards the workpiece by the powerful electrostatic charge. polyurea spray The item is then heated, and the powder melts into a standard film and is then cooled to create a tough coating. To accomplish more uniform finish preheating could help but problems can be created as runs caused by excess powder.
Tribo gun is the 2nd type of gun that is used to spray powder on metal surfaces. The powder is first charged by triboelectric friction and these charged powder particles then adhere to the grounded substrate. It requires a different formulation of powder regarding corona guns.
Fluidized bed method can be used 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 technique of coating.