Applications that Benefit from Temperature Profiling
Sophisticated profiling systems are not only for use in automotive plants. Powder coating of aluminum extrusions and other architectural components is another typical application that can benefit from the use of a sophisticated profiling system to measure product temperature, infrared preheat zones and the convection oven curing process. Generally, powder-coating ovens are large and do not have entrance restrictions. Large architectural pieces such as aluminum extrusions are transported through the oven on overhead conveyor systems. Many convection ovens also include an infrared preheat zone designed to raise the substrate temperature as quickly as possible to the cure temperature and reduce process time.
For aluminum substrates, surface and air probes often are attached directly to the production pieces. Thermal barriers should be hung from the conveyor behind the product to prevent their mass from acting as a heat sink and affecting temperature measurement.
If the same item is being cured routinely, a test-piece can be constructed. The test-piece should be designed to mimic exactly the item being cured in thermal mass, orientation and position in the oven. The benefit of a test-piece is that thermocouples can be left attached to the piece and the transducer interface portion of the data logger. This minimizes setup, ensures measurement repeatability and removes any risk of damaging production items.