The reflow soldering machine is a kind of automatic surface mount technology equipment, which can lay electronic components on the surface through the circuit board, and use high-temperature baking way to weld the components and the circuit board to ensure the reliability of the solder joints and keep the normal operation of components. It plays important role in electronic manufacture industry, because it can not only improve the production speed and quality according to the high accuracy operation and continuous production ability, but also reduce the production cost.

How it Works?

The reflow soldering machine is a closed chamber that circulates through hot air and pumps to control the temperature and heating time. Because modern reflow soldering machines are often equipped with nitrogen floating function and multiple heating zones, it makes solder joints more reliable.

The principle of the reflow soldering machine is to use hot air or nitrogen to heat the solder joints on the circuit board, so that the solder melts and connects with the copper foil on the circuit board. After heating, hot air or nitrogen is used to force cooling quickly so that the solder joints solidify and produce a hard and strong connection. The whole process is defined as a reflow process.

The reflow soldering machine is easy to control the temperature, prevent oxidization in welding, and also easy to control the manufacture cost. At the beginning, you need to wipe the suitable solder paste on the pads of the circuit board. Then to paste the SMT components to the corresponding positions. Because of the sticky solder paste, the components are easy to be fixed. Finally, make the circuit board finished making up into the reflow machine.

Types of Reflow Soldering Machine?

The reflow soldering machine can divide into 3 types according to the operation temperature, namely, general reflow soldering machine, lead-free reflow soldering machine, and reflow soldering machine with high temperature.

The general reflow soldering machine is mainly used in low temperature welding, the temperature is about 200-250℃. Due to the low temperature in working, it’s not suitable for high temperature welding and welding for some special application products, such as the LED lights, because it needs some components can work in high temperature.

Lead-free reflow soldering machine is to weld based on environmental protection and human health, the way is to weld without lead. In electronic industry, the lead emission is gradually increased sue to the high speed of production and high speed of production. With the importance of the environmental protection, many countries limit the usage and emission of the lead. Therefore, the lead-free reflow soldering machine is more and more popular, which can be used in 200-270℃, and in the temperature range, you can weld many kinds of electronic components and products.

The reflow soldering machine with high temperature, which convey the same meaning of the name, people can use it in more than 250℃ welding, which mainly makes the electronic components with high requirements such as semiconductor devices and PCB boards. The machine need to accurately control the temperature in heating and cooling to make sure of the quality of the solder joints and the proper function of the electronic components, while ensuring the efficiency of the reflow soldering process.