Need of Powder Coating Equipment
What Is Powder Coating Equipment?
It is a form 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 can be a thermoset polymer or perhaps a thermoplastic. Generally, it is used to provide a tough finish which can be harder than the conventional point which was formerly used. The key intent behind applying this equipment is for coating metals, such as 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 ways 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 utilization of chromates and phosphates. Phosphating and chromatin of the substrate occur in multiple stages. Bonding of the powder to the metal involves cleaning in the pre-treatment process. Sand Blasting is another approach to preparing the outer lining ahead of coating. It is used to supply finishing, etching, surface texturing and preparation, and degreasing for products made of wood, glass, or plastic. polyurea Different powder coating applications can require alternative ways of preparation such as abrasive blasting ahead of 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 employed for applying the powder coating to metal objects. Here, let’s 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 uniform film, and is then cooled to make a tough coating. To attain more uniform finish preheating may help but problems can also be created as runs caused by excess powder.
Tribo gun is the next kind of gun which can be used to spray powder on metal surfaces. The powder is first charged by triboelectric friction and these charged powder particles then abide by the grounded substrate. It needs an alternative formulation of powder regarding corona guns.
Fluidized bed method can also be employed for Powder coating. At first 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.