Welcome to contact SunzonTech for support of your reflow oven process.
If the cooling speed is too slow, the solder paste may oxidize with the moisture in the air, which would cause bad soldering quality. The faster cooling effect it is, the better soldering quality it will have. When the temperature is cooled below the solidification point of the solder paste, the solder joints will solidify. The residence time in the reflow soldering zone of the reflow oven should not be too long or it may damage the PCB and the components. The temperature in the reflow soldering zone of the reflow oven is the highest comparing to other zones, the tin powder metal substance in the solder paste is fully melted and the flux is fully volatilized. In order to achieve the temperature balance of each component, the flux need to be fully volatilized to reduce the welding bubble rate. Because the size of each component on the PCB is different, the small component heats up quickly and the large component heats up slowly. The heat absorption zone is to stabilize the temperature of various components in the reflow oven. The iron is at a much higher temperature than. Heat absorption zone function of reflow oven The temperature of a soldering iron does not resemble the temperature required for a solder joint to form. If it is too slow, it may affect the welding quality. If it is too fast, it may damage the components. The heating rate of the preheating zone should be controlled within an appropriate range. The flux volatilizes with the rise of temperature. The function of preheating zone is to activate the solder paste, let the solder paste start to move, and the solder material reaches thermal equilibrium. Different temperature zones correspond to different reflow effects and reflow temperature curves. Reflow oven is generally divided into four temperature zones, which are preheating zone, heat absorption zone, reflow zone, and cooling zone. What are the four temperature zones of reflow oven? Generally, reflow oven is divided into four different temperature zones and each zones have different functions, so what is the function of each temperature zone of reflow oven? The following SunzonTech will explain to you the function of each temperature zone of reflow oven. The temperature profile and temperature control of the reflow oven have a great influence on the soldering quality of the PCB. It mainly melts the solder paste and welds the electronic components with PCB pads. Reflow oven is one of the core machine of a smt production line.
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