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SMT process solutions for small factories
Now the PCB size is 10 × 15cm, including a total of 38 0805 and 1206 pieces and a patch IC. The patch scheme is set based on 20 plug-in elements as THT process. The following scheme is preliminarily set with the daily output of 5K as the production quantity. Electronic manufacturers complete the production and assembly of a complete set of electronic products, which is generally composed of SMT process and traditional THT plug-in process. It is recommended that SMT process be combined with traditional THT process for production at this stage. The following is a description of semi-automatic and fully automatic process. (mainly surface mounting process)
I. SMT production process suggestions for small factories
1. Suggested component assembly method:
1) Single-side tin slurry welding: Note: single-side welding and double-side welding are basically the same in the production process. Therefore, the selection of process, equipment configuration and personnel ranking are basically the same. In the actual production operation, side A is welded first, and then repeat the same process, in the tin printing process and reflux welding machine Settings for relative adjustment to welding side B.
Ii. SMT equipment configuration
A. Tin in India:
1). One manual printing press
2). 1 scraper (tin pulp stirring knife)
3) Steel mesh (customized according to your company's products)
4). Tin paste (patch glue)
Note: For double-sided welding, positioning plates need to be added on the printing press. Solder paste with the same melting point can be used.
B. Patch part:
1) 10 sets of artificial patch pens
The general speed of artificial patch is 1 /2-3 seconds per person, and the interior can be designed to place a component for 3 seconds.
2) 20 material racks
3) 1 platform production line
Since it is possible to weld both sides, a guide rail is necessary.
Note: One automatic laminator can be selected for the patch part (0.20 seconds/piece).
C. Welding part:
1) 1 hot air reflux welding machine.
Iii. SMT process flow
Start - > a-side solder paste printing - > a-side SMT SMD element - > element A relatively is QC - > reflow welding machine for welding repair welding - > appearance test QC - > B surface into components - > B surface welding THT components - > appearance test repair welding QC - >
