Fluidisation in powder coating: Optimal powder conveying for uniform coatings
Fluidisation is a crucial process step in powder coating. It ensures that the powder is evenly dispersed, thus guaranteeing consistent powder delivery. Inadequate fluidisation can lead to clumping, uneven coating and other quality problems.
Why is fluidisation important?
- Uniform powder distribution: Good fluidisation ensures a homogeneous powder cloud, which enables uniform coating.
- Prevention of clumping: Correct agitation of the powder prevents agglomerates that can impair the coating quality.
- Stable powder delivery: Constant fluidisation ensures an even flow of powder to the spray gun.
Common problems with fluidisation
- Clumping in the powder: Can occur due to prolonged storage or high temperatures. Solution: Use fresh powder and check the storage conditions.
- Insufficient fluidisation: With difficult powders, additional vibration of the powder container may be necessary. GEMA recommends the use of pneumatic or electric vibrators for this purpose. Further information.
- Unsuitable powder containers: Not all containers are suitable for vibration. For example, the powder containers of the GEMA OptiCenter are not designed for vibration.
Best practices for optimal fluidisation
- Regular maintenance: Check the condition of your fluidisation plates regularly and replace them if necessary.
- Control the air humidity: Relative humidity above 80% can have a negative effect on fluidisation. Ensure suitable climatic conditions in your coating area.
- Use suitable powder coatings: Ensure that the powder coatings used are suitable for fluidisation and do not tend to agglomerate.
Conclusion
Correct fluidisation is essential for high-quality powder coating. By observing the above points, you can improve the quality of your coatings and avoid typical problems.
To the manualsystems To the contact form
