If you require a continuous oven to dry or cure a wet coating or
powder, look into combining infrared and convection heating. Often, it
can provide the same results as a conventional convection oven within a
smaller equipment footprint.
Infrared heating, by contrast, uses radiant heat generated by infrared emitters to quickly heat part surfaces. The emitters operate at a higher temperature than the cure temperature -- typically 1,100 to 4,000oF (593 to 2,204oC). This is ideal for flat or fairly regular part surfaces. However, because the radiant energy travels only in a straight line as it leaves the emitter, it cannot reach hidden areas of the parts except by conduction or reflection. In other words, areas of the parts not in the heater's line of sight do not heat quickly. By combining both technologies in the same oven, the advantages of both can be realized while minimizing the disadvantages (figure 1).