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  Comparison of advantages and disadvantages of nitrogen reflow welding

  Many large SMT processing enterprises or large electronic product manufacturers not only use reflow welding machines but also use nitrogen reflow welding. So what are the advantages and disadvantages of nitrogen reflow welding compared with ordinary reflow welding? Guangsheng De here to share.
  
  
  Nitrogen reflow welding
  
  Advantages of nitrogen reflow welding:
  
  Reduce circuit board oxidation by reflow furnace.
  
  Improve reflow welding capability.
  
  Enhanced reflow soldering properties.
  
  Reduce the hole rate of the circuit board reflow, because the oxidation of the solder paste or welding pad is reduced, the hole is naturally reduced.
  
  Disadvantages of nitrogen reflow furnace:
  
  Cost burning, nitrogen is more expensive, belongs to the consumption of products to be often invested.
  
  Increased probability of component tombstones after reflow soldering.
  
  Enhanced wick effect.
  
  The disadvantages of nitrogen reflow welding are summarized as extra money, increased probability of component tombstones and enhanced wick effect.
  

  News Center / Industry News / 2022-09-12 15:46:31
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  What are the functions of eight temperature zone energy-saving AC reflow welding

  No matter how many temperature zones reflow is reflow, their temperature Settings are set according to the principle of action of these four temperature zones. On the market, there are generally more eight-temperature reflow, so consult how to set the eight-temperature reflow temperature. First of all, what are the functions of eight-temperature zone energy-saving AC reflow welding?
  
  
  
  Unique advanced and long-life heating system
  
  1, reflow heating system adopts energy-saving Sweden imported 220V double-layer nickel heating wire, radiation power peak wavelength 4UM, with curved reflector, high thermal efficiency, fast temperature rise, special forced hot air circulation structure system, so that PCB and components are heated evenly, completely eliminate the "shadow effect"
  
  2, the use of Swiss imported high current solid state relay contactless output, safe and reliable, combined with the temperature controller's unique fuzzy control function, has been monitoring the external temperature and heat value changes, with low pulse control heating device, rapid response, to ensure the temperature control accuracy of ±1 ° C, the machine temperature distribution error within ±2 ° C, the length direction temperature distribution in line with IPC standards
  
  3, reflow temperature control adopts precision controller imported from Japan with fuzzy control and PID intelligent operation, through PID intelligent operation, automatic control of heat, fuzzy control function to increase overmodulation and suppression function and rapid response to external heat changes, faster response to external heat changes and through internal control to ensure more balanced temperature
  
  4, reflow heat pipe module design, easy maintenance and disassembly
  
  5, the use of imported high temperature and high speed motor, smooth wind, small vibration, small noise
  
  6, the upper furnace body can be automatically opened, easy to clean the furnace
  
  7, with temperature overshoot, fault diagnosis, sound and light alarm
  
  8, abundant power, rapid heating, from room temperature to constant temperature about 15 minutes
  
  9, reflow special SSR radiator, heat dissipation efficiency is greatly improved, effectively extend its service life
  
  10, all use medium reflow imported components to ensure high reliability of the entire system
  
  Reliable and smooth transmission system
  
  1. The transmission system adopts imported variable speed motor, stepless governor, with 1:150 turbine reducer, smooth operation, speed 0-1500mm/min stepless adjustable
  
  2. Reflow welding adopts independent roller structure and top support, combined with matching stainless steel mesh belt, stable operation, speed accurate up to ±20mm/min
  
  3. Special stainless steel B mesh belt, durable and wear-resistant. Long time use is not easy to change
  
  Stable and reliable electrical control system
  
  1. Delay switch protection function, uniform cooling after shutdown, to prevent deformation of transmission components due to uneven cooling
  
  2. Power off protection function to ensure the normal output of PCB board after power off without damage return to Sohu, see more
  

  News Center / Industry News / 2023-02-08 15:46:31