1. The pressure of the air source can be configured based on the equipment’s requirements. You can use the factory’s air source or configure a separate oil-free compressed air machine. Generally, the pressure should exceed 7 kg/cm². Clean, dry, and purified air is necessary; thus, the compressed air must undergo degreasing, dusting, and water removal treatments. Use stainless steel or pressure-resistant plastic pipes for air ducts.
2. Exhaust
Reflow soldering and wave soldering equipment need to be fitted with exhaust fans. For all hot blast stoves, the minimum exhaust duct flow rate should be 500 cubic feet/min (14.15 m³/min).
3. Temperature and Humidity
The ideal ambient temperature for the production workshop is 23±3°C, with a general range of 17–28°C. The relative humidity should be between 45% and 70% RH. Install suitable thermometers and hygrometers for regular monitoring, and provide temperature and humidity control facilities.
4. Anti-static
Workers must wear anti-static clothing, shoes, and wristbands when entering the workshop. The anti-static work area should include anti-static flooring, seat cushions, packaging bags, turnover boxes, and PCB board racks.
**SMT Patch Processing Factory**
**Two, SMT Patch Processing Considerations**
1. Solder Paste Refrigeration
Newly purchased solder paste must be refrigerated if not used immediately. The ideal temperature is between 5°C and 10°C, but it should not drop below 0°C.
2. Timely Replacement of Worn Parts
Due to equipment aging, suction nozzle damage, or feeder issues during placement, it can lead to misalignment, high throw rates, reduced production efficiency, and increased costs. Regularly check for blockages or damage in suction nozzles and ensure feeders are intact.
3. Measuring Furnace Temperature
Proper soldering quality is closely linked to the correct setting of reflow soldering process parameters. Perform two furnace temperature tests within 24 hours, and at least one test every 24 hours, to refine the temperature curve and optimize it for the products. This step is crucial for maintaining production efficiency and controlling costs.
During SMT patch processing, maintain strict control over temperature, cleanliness, and humidity in the workshop. Staff should take corrective measures, handle processes carefully, and periodically inspect consumables for damage, replacing them as necessary.
