Process requirements for the three prevention paint coating machine

1. Clean and dry the board to remove moisture and moisture. It is necessary to first remove dust, moisture, and oil stains from the surface of the object to be coated, in order to fully utilize its protective effect. Thorough cleaning can ensure that corrosive residues are completely removed and that the three proofing paint adheres well to the surface of the circuit board. Drying conditions: 60 ° C, 10-20 minutes, take it out in the oven and apply it while it is hot;

2. Using the brushing method for coating, the fully automatic three proof paint coating machine equipment should have a larger brushing area than the area occupied by the device to ensure full coverage of the device and solder pad;

3. When brushing, the board should be placed as flat as possible, and there should be no dripping after brushing. The brushing should be flat and there should be no exposed parts, preferably between 0.1 and 0.3mm.

4. Before brushing and spraying, ensure that the diluted product is thoroughly stirred, and let it stand for 2 hours before brushing or spraying. Use a high-quality natural fiber brush to gently brush and dip at room temperature. If using machinery, the viscosity of the coating should be measured (using a viscosity agent or flow cup), and a diluent can be used to adjust the viscosity.

5. The circuit board components should be vertically immersed in the paint residue. Do not immerse the connectors of the fully automatic three proof paint coating machine equipment, unless carefully covered. The circuit board should be immersed for 1 minute until the bubbles disappear, and then slowly removed. A uniform film will form on the surface of the circuit board. Most of the paint residue should be allowed to flow back from the circuit board to the impregnation machine. TFCF has different coating requirements. The immersion speed of circuit boards or components should not be too fast to avoid excessive bubbles.