How does IR tack-drying work?
Traditional convection ovens use electric coils to heat the air; the air moves around and heats the coating; eventually the coating heats the substrate. Once the substrate gets hot enough to not heat-sink the coating, the coating dries from the outside. The Argus IR Tackdry Oven employs 5 to 8 micron IR emitters that directly transmit energy to the densest material, in this case the PCB. Because the air and coating are between the emitter and the PCB, some residual heating occurs, but the bulk of the energy is absorbed by the PCB. This means that the coating predominantly dries from the inside; that is, the junction between the PCB and the coating, thus increasing the drying rate while reducing skin formation and solvent retention. Forced air circulation in the 9724 then rapidly removes the evaporated solvent from the PCB surface. Typical developing speed for 6-7 ft. chamber is 10 to 12 feet per min. for following requirements: • Maintain minimum 0.
Traditional convection ovens use electric coils to heat the air; the air moves around and heats the coating; eventually the coating heats the substrate. Once the substrate gets hot enough to not heat-sink the coating, the coating dries from the outside. The Argus IR Tackdry Oven employs 5 to 8 micron IR emitters that directly transmit energy to the densest material, in this case the PCB. Because the air and coating are between the emitter and the PCB, some residual heating occurs, but the bulk of the energy is absorbed by the PCB. This means that the coating predominantly dries from the inside; that is, the junction between the PCB and the coating, thus increasing the drying rate while reducing skin formation and solvent retention. Forced air circulation in the 9724 then rapidly removes the evaporated solvent from the PCB surface. Typical developing speed for 6-7 ft. chamber is 10 to 12 feet per min.
