Fluidized Bed Coating

EVCO Engineered Solutions, Inc. is a premier turnkey coating systems integrator specializing in the custom engineering, fabrication, and installation of heavy-duty fluidized bed powder coating systems.

Designed for high-volume or heavy-duty components requiring thick, uniform protective layers—such as wire racks, heavy piping, and industrial castings—our custom fluidized bed immersion setups feature high-efficiency gas-forced fluidizing air plates, precision pre-heating and cure ovens, and robust material handling integrations.

From initial consulting and airflow modeling to final field installation, EVCO delivers rugged, automated or semi-automated dip tank environments that maximize transfer efficiency, eliminate finish failures, and optimize your production footprint for an exceptional return on investment.

A fluidized powder bed is a container where fine paint powder is suspended and agitated by an upward flow of compressed air. The process causes dry powder particles to separate and behave like a gently boiling liquid, allowing metal parts to be dipped for an even, flawless coating.
 
How It Works
Instead of using static paint or a spray gun, the fluidized bed relies on the principles of air suspension and thermal bonding:
  1. Fluidization: Compressed air is forced through a porous membrane at the bottom of the container, fluffing the powder paint and making it act like a liquid.
  2. Preheating: The part to be painted is placed in an oven and heated to a specific temperature (typically between 350°F and 500°F).
  3. Dipping: The hot part is submerged into the floating cloud of powder. The residual heat melts the powder instantly, causing it to bond to the surface.
  4. Curing: The coated part is placed back into an oven to fully cure, creating a seamless, durable finish.

Fluidized bed coating has various advantages vs traditional spray coating:

  • Superior Uniformity and Thickness
  • Repeatable process (if using an auto dipping system)
  • High efficiency and cost savings
  • Perfect for complex geometry
  • Exceptional durability

Some limitations include:

  • Pre and Post heat ovens often required
  • very thin parts tend to not hold heat long enough and thus difficult to coat
  • Some Complex parts tend to trap excess powder
  • Coats thinner than 8 mills difficult to achieve. 

There are many other solutions available for powdercoating, epoxy coating and primers.

Click below to contact us today to design a custom system fo you!

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