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Points to pay attention to when replacing lead-free environmentally friendly tin bars

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Update time : 2022-11-18 16:21:48
The lead-free environmentally friendly tin bar runs in the wave furnace for a long time, and other metal elements are precipitated to form the lead-free environmentally friendly tin bar. The increase in other metal content and impurities will affect the soldering effect of the lead-free solder bar and the oxidation of the lead-free solder bar. If the speed is too fast, the amount of tin slag will increase. When the copper content in the lead-free environmentally friendly tin bar exceeds the specified value, the viscosity of the liquid tin of the lead-free solder bar will weaken the fluidity of the lead-free solder bar with the increase of the copper wall. The surface of the soldered joints is rough, and there is a general phenomenon that affects the reliability of the solder joints. At this time, the lead-free solder bar must be replaced. The lead-free and environmentally friendly tin bar has a bright liquid surface when the soldering furnace is operating at high temperature, and there is no need to scrape the solder slag on the soldering surface every time. ; After tinning, the surface of the pin is bright and smooth, and the appearance is good; there is less tin slag, which can reduce the cost of materials.
Turn on the switch of the lower port of the tin furnace to let the tin liquid flow out, pay attention to the lowering of the outflow port and place the tin tank, heat the tin furnace in the wave peak to make the lead-free environmental protection tin bar reach the melting temperature, turn off the motor to set the temperature of the tin furnace Between 280-300 degrees, salvage the scum on the surface of the tin at the same time, and put cold water in the tin tank to cool the lead-free environmentally friendly tin bars quickly. Be careful of burns when operating this action. When two-thirds of the tin liquid flows out, remove the motor to remove the obstacles above the tin furnace and raise the furnace temperature to make the lead-free solder liquid flow out smoothly.
When salvaging, the action should be gentle to facilitate the smooth removal of the lead-free and environmentally friendly tin bars from the wave furnace. The heat pipe of the wave furnace is melting the main parts of the solder bar. It is necessary to check frequently whether there is any deviation between the temperature set by the tin furnace and the actual temperature. The spray port of the flux should be checked and cleaned regularly to check whether the spray is blocked and to help Clean the flux pipeline with industrial alcohol to keep the pipeline unobstructed.
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