Common Screen Printing Issues and Solutions
1. Blade Edge Gap and Scraper Pressure Issues
- Issue: Gap on the blade edge, low scraper pressure
- Solution: Grind scraper, increase pressure
2. Bleeding
- Issue: Round blade edge, low screen printing angle, low viscosity
- Solution: Sharpen blade, increase angle, use higher viscosity ink
3. Poor Screen Printing Pattern and Uneven Coating
- Issue: Poor thixotropy, slow screen pick-up, close screen graphics
- Solution: Adjust printing material, increase tension, use larger screen frame
4. Screen Printing Pinholes
- Issue: Uneven screen mask, impurities in printing material
- Solution: Repair screen with glue, scrub screen to remove impurities
5. Short Screen Life
- Issue: Uneven printed board surface, improper tension, screen-making emulsion
- Solution: Surface treatment, adjust tension, select suitable emulsion
6. Screen Printer Operation Precautions
- Ensure cleanliness and lubrication of machine parts
- Tighten screws and maintain horizontal installation
- Protect and clean the vacuum pump dust collector
Note: These precautions will help maintain the screen printer’s functionality and prolong its lifespan.
