![]() If this happens, you will have no other choice than open the oven and bypass the thermostat control knob. If you want to reflow with lead-free solder paste there is the possibility that the thermostat of the oven will shut it down before the temperature you need to reach. If do not plan to open and modify internally the oven make sure that you can turn it always on with the supplied knobs. You are not going to use those controls and you can save some money by getting a basic one with only manual controls. ControlsĪvoid the new electronics controlled oven with cool displays and touch buttons. If you have an unused oven lying around you can try to use it before going out and buy a new one, but if you need to get a new oven there are some things to keep in mind when choosing it to buy the best you can for your job. It mainly provides customers with SMT production lines including SMT Stencil Printers, Pick and place machines, Reflow Oven, AOI Machine, Wave Soldering Machine and PCB Handling Machine etc.Since you will be cooking some nasty things inside your oven you are going to need a dedicated oven for your reflow soldering. The cooling rate of the cooling zone is generally about 4℃/S, and it is only necessary to cool it at 75℃. A large grain structure is prone to occur at the soldering point, which makes the strength of the soldering point lower. If the cooling rate is too slow, excessive eutectic metal compounds will be produced. The cooling rate will affect the strength of the solder joints. The working principle of Lyra Reflow Oven cooling zone:Īt this stage, the temperature of Lyra Reflow Oven is cooled below the solid phase temperature to solidify the solder joints. In the Lyra Reflow Oven soldering area, pay special attention to the reflow time not to be too long, in order to prevent damage to the Lyra Reflow Oven furnace, it may also cause poor function of the electronic components or cause the circuit board to be burnt and other adverse effects.Ĥ. The soldering point affects the soldering strength. If the peak temperature of Lyra Reflow Oven is too low, it is easy to produce cold junctions and insufficient wetting if Lyra Reflow Oven is too high, the epoxy resin substrate and the plastic part will be coking and delamination prone to occur, and excessive eutectic metal compounds will form and cause brittleness. In this area, the heater temperature is set high, so that the temperature of the component rises rapidly to the peak temperature. When the PCB enters the reflow zone, the temperature rises rapidly so that the solder paste reaches a molten state. ![]() The working principle of the Lyra Reflow Oven soldering zone? It should be noted that all components on the SMA should have the same temperature at the end of this section, otherwise, entering the reflow section will cause various bad soldering phenomena due to the uneven temperature of each part.ģ. At the end of the heat preservation section, the oxides on the pads, solder balls and component pins are removed under the action of the flux, and the temperature of the entire circuit board is also balanced. Give enough time in this area to make the temperature of the larger component catch up with the smaller component, and to ensure that the flux in the Lyra Reflow Oven solder paste is fully volatilized. The main purpose of the Lyra Reflow Oven heat preservation stage is to stabilize the temperature of each element in the Lyra Reflow Oven furnace and minimize the temperature difference. The working principle of the Lyra Reflow Oven insulation zone: Due to the faster heating rate, the temperature difference in the reflow furnace at the back stage of the Lyra Reflow Oven temperature zone is relatively large.Ģ. Affect the soldering quality of Lyra Reflow Oven. If it is too slow, the solvent will not evaporate sufficiently. If it is too fast, thermal shock will occur, and the circuit board and components may be damaged. The goal of the Lyra Reflow Oven is to heat the PCB at room temperature as soon as possible, but the heating rate must be controlled within an appropriate range. Preheating is to activate the solder paste, and to avoid the rapid high temperature heating during immersion in the tin, which is a heating action performed to cause defective parts. ![]() The working principle of the Lyra Reflow Oven preheating zone: Reflow Oven is a soft soldering that realizes the mechanical and electrical connection between the solder ends of surface mount components or the pins and the printed board pads by remelting the solder paste pre-distributed on the printed board pads. Reflow Oven is divided into four temperature zones in total: preheating zone heating zone melting soldering zone cooling zone. For Lyra reflow oven as an example, let's talk about the working principle of these four temperature zones.ġ. ![]()
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