The function and purpose of selective wave soldering/selective soldering
Flux spray system
Selective welding uses a selective flux spraying system, that is, after the flux nozzle is run to the specified position according to the pre-programmed program instructions, only the soldering area (point spray and line spray) is applied to the area to be soldered on the circuit board. The amount of spray in the area can be adjusted according to the program. Due to the selective spraying, not only is the amount of flux used much greater than that of wave soldering, but it also avoids contamination of non-welded areas on the board.
Because of the selective spraying, the accuracy of the flux nozzle control is very high (including the way the flux nozzle is driven), and the flux nozzle should also have an automatic calibration function.
In addition, in the flux spraying system, the choice of materials must be able to take into account the strong corrosiveness of non-VOC flux (ie water-soluble flux), therefore, wherever possible contact with flux, parts must be Can resist corrosion.
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