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| Gyrex Model 8300 Infrared Dryer |
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Gyrex model 8300 uses six Infrared Drying panels to heat the PCB’s as they pass through the machine. Infrared light is used because it will heat up the PCB to a high temperature without heating the surrounding air. By heating the board the solvents within the ink layer will begin to evaporate at the board surface outward to the ink surface. Keeping the air temperature low assures that a surface "skin" will NOT form. This surface skin will trap solvents in the ink layer and not allow the board to dry properly. |
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As the surface temperature of the board rises it begins to evaporate the solvents closest to the board and continues to the outside layer of the ink until all solvents are removed from the ink. This process allows for the use of much higher temperatures (up to 130° C) than conventional ovens and allows for dramatically quicker drying times. The three zones will approach 115° C, 130° C, and 110° C, respectively.
The board then leaves the drying section and enters the cooing section where it is cooled to room temperature and may be handled immediately.