Here at TD Finishing, we are proud to be one of the country’s leading suppliers of powder coating equipment. If you are a business looking to invest in such facilities, you may be looking to have those all important questions answered to begin with. For example; ‘what is powder coating?’. As highly experienced experts in powder coating systems, we’ll be able to answer all of these questions and more. Therefore, you’ll be confident enough to know exactly what you need and exactly how to use powder coating equipment.
What is Powder Coating?
Powder coating is a type of finishing process that is applied to metal surfaces. A surface that has been powder coated is guaranteed to be more resistant against corrosion, scratches, wear and tear, chipping, and fading. Especially compared to a surface which doesn’t have this advanced protective finish. It consists of a flowing, fluidised powder which when baked in a powder coating oven, flows as a liquid before cooling to form a hard and durable finish. Typically used for metal substrate, TD Finishing powder coating equipment has been used to paint everything from bicycles to car parts and domestic boilers to Architectural aluminium.
How is Powder Coating Applied?
Typically, there are three stages to the powder coating application:
- The first stage involves preparing a surface for powder coating. This can be done in several ways, depending on the final finish requirements. The two most common ways are hand wiping with cleaner and shot-blasting followed by a full online pre-treatment plant. Our Pre-treatment plants work in one of two ways, an online spray for conveyorised plant or an automated dip tank with gantry system. The system allows for basket loading of longer, or higher quantities of material. The powder coating pre-treatment is designed to clean and prepare the surface of the substrate allowing for good, reliable adhesion of the powder coating. TD Finishing can assist you with working out the correct pre-treatment regime for your business. This stage is followed by the use of a powder coating drying oven.
- Once dried and cooled to a suitable temperature, the second stage involves the careful application of the powder coating. Electrostatically charged on leaving the gun, the positive (+ve) coating is attracted to the grounded substrate material. It is then held in place by the electric force. The application equipment is required to ensure sufficient charge of the particle, as well as field strength. This helps to prevent the powder bouncing off or falling from the substrate before curing. For fluidised beds, or fusion bonded epoxy coatings, the product is heated during the drying stage for the purpose of melting the powder in to a green-cured state before moving to stage three.
- Finally, when the substrate is fully coated the third stage involves heating the product in a powder coating oven to the required temperature. The product then dwells until the powder has fully flowed across the surface. The times and temperatures will vary depending on factors such as the powder, thickness or gauge of material and product weight. But, typically around 180-200 degrees for 15-30 minutes is sufficient. Critical to this part of the process is ensuring the temperature uniformity of your oven is such, that all parts of the product cure evenly. TD have many years’ experience in powder coating equipment. As a result, we understand the importance of air movement within the oven whilst simultaneously balancing the flow. Therefore, avoiding any significant disturbance of the powder prior to jelling.
Powder Coating Equipment for Sale
TD Finishing expertly supply online conveyorised powder coating systems, manual & monorail conveyors, power & free systems, standalone box ovens. As well as, infrared ovens for simple one-dimensional products, or as a pre-gel system to prevent cross contamination during a colour change. We can also supply equipment for wet spray systems where required. No matter what type of powder coating plant you are looking for, we’ll work hard to find you the perfect solution for your requirements.
Contact us Today
So, you now know about powder coating. However, if you would like more information on our powder coating equipment then head to our website today. Or, call 0121 520 8884 to speak to a member of our helpful and friendly team.
If you enjoyed reading this blog you may also like to read our previous article on powder coating plants.