In powder coating technology, powder recycling is an important part of cost and environment.
In this paper, we will
introduce the common powder recovery methods and their principles in powder
coating equipment, and discuss their significance in practical application.
Screening is a common way of powder
recycling, in which the powder not adhered to the surface of the workpiece is
filtered out through the screen. The principle is to use the aperture size of
the screen, so that the powder through the larger particles are filtered out.
Circulation system recycling saves material
costs by collecting unused powder for reuse. The unadhered powder is
transported back to the spray gun of the spraying equipment through the piping
system, realizing efficient powder utilization.
Vacuum adsorption recovery utilizes a
vacuum system to adsorb unadhered powder into an adsorber, which is suitable
for the recovery of fine powder. The powder is adsorbed into the adsorber by
negative pressure and then processed and reused.
Mechanical collection and recycling
collects the unused powder from the spraying chamber by mechanical means,
avoiding the waste of powder, and is applicable to different types of powder
coating equipment.
Inert gas assisted recovery utilizes inert
gas to push the unutilized powder into the collector to reduce powder
dissipation and is suitable for high temperature or oxidizing powder coating
processes.
A combination of the above recycling
methods can achieve the best results. The continuous innovation and improvement
of powder recycling technology provides more possibilities for increasing the
utilization rate of powder and reducing environmental pollution.
Powder recycling plays a vital role in
powder coating equipment, which is not only conducive to cost saving, but also
helps environmental protection. Through reasonable selection and comprehensive
use of various recycling methods, powder utilization can be maximized,
production costs can be reduced, and sustainable development can be achieved.
Therefore, the powder coating industry needs to pay constant attention to the
innovation and application of powder recycling technology to promote the
development and progress of the industry.