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Professional Solution Provider for Various Industrial Applications.
There are many reasons that can cause consequences to the final quality in SMT placement, such as the quality of chip components, the pad quality of PCB circuit board, solder paste, solder paste printing, the placement accuracy of SMT mounter, the furnace temperature curve adjustment of reflow soldering, etc.As a very common part of SMT, what are the methods of brushing solder paste on PCB board?1. Manual printing machine for PCB with solder paste 1. Accurately fix the steel mesh on the printing machine according to the product model, and check whether the steel mesh corresponds to the product; 2. Place the appropriate solder paste in the steel mesh, and pay special attention to that the solder paste must be stored in a low temperature environment;3. Put the PCB on the solder paste printer accurately, and print the solder paste on the PCB with a special tool for brushing the solder paste; 4. Check whether the solder on the PCB is uniform. If there is more solder or less solder, it is not up to standard. For the unqualified products, wipe off the solder with a towel or cloth and print again.The qualified products flow to the next process;
2. Automatic solder paste printing machine for PCB board brushing solder paste 1. Accurately fix the steel mesh on the printing machine according to the product model, and adjust the height.Check whether the steel mesh corresponds to the product; 2. Place the appropriate solder paste in the steel mesh, and pay special attention to the fact that the solder paste must be stored in a low temperature environment; 3. Place the PCB accurately on the solder paste printer, and press the start button to print the solder paste on the PCB;4. Check whether the solder paste on the PCB board is well-proportioned. If there is more tin or less tin, it is not up to the standard. For the unqualified products, wipe off the solder paste with a towel or cloth and print again.Qualified products flow to the next process; the above common precautions include: 1. Solder paste should be stored in a low temperature environment, and should be stored in a low temperature environment immediately after use; 2. Steel mesh should be cleaned immediately after use. If it is not cleaned immediately, the steel mesh will be damaged. The steel mesh can be cleaned by a steel mesh cleaning machine; 3. When operating the automatic solder paste printer, pay special attention not to put your hands under the steel mesh;Above is the PCB board brushes the solder paste method to introduce the entire content profit, hoped has the help to you.
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