All the electronic products in our life are processed by SMT factory, SMT factory complete output a pcba or an electronic product, involving very many SMD process links. Today we will talk to you about the SMT placement plant process required to control the focus contains which.
SMT factory including SMT, DIP, assembly and packaging of the three blocks, down around these three blocks to discuss.
SMT is what we often say SMD processing services, involving the process contains solder paste printing, placement of electronic components, reflow soldering, which is the smt process of the three main focus. Solder paste printing is mainly solder paste through the stencil scraping to the PCB pad of the designated position, this is a very important process, if the solder paste printing is not flat, solder paste offset, solder paste too much, how much or even pull tip, will cause the quality of the later welding problems, so solder paste printing quality is increasingly important. Mounting electronic components is to see the ability of the mounter, if the mounter does not work, it will lead to a lot of leakage, reverse parts and wrong parts and throwing material, resulting in low efficiency, rework, and waste of manpower and material resources. Reflow soldering process control is mainly reflected in the reflow soldering furnace temperature curve, including four temperature zones, preheating, constant temperature, reflow, cooling zone, the temperature of different temperature zones is not the same, control the furnace temperature curve adjustment, conducive to welding quality.
DIP is called plug-in, mainly some electronic components and through-hole pin pieces, after the plug-in design to wave soldering machine, wave soldering machine has some selective wave soldering, welding process requirements are very high, the specified pad solder joints only need to be welded.
Assembly and packaging is generally to the finished product stage, mainly is the pcba and other shell material assembly, get into a finished electronic products. This link is the most important is the efficiency and various tests, this process link is our common factory assembly line, mainly involving a large number of manual, need to do a good job of each station link process guidance documents, operate in accordance with the requirements, and as far as possible to improve efficiency, while the need for the finished product for various functions, performance testing, all OK, you can package and ship to customers.
