As a product or industry expert, it is crucial to understand the common abnormality handling of cover tape in the packaging process. Cover tape plays a vital role in protecting components during transportation and handling, so it is essential to address any abnormalities promptly and effectively.
■ Adhesive Residue Defect
● Common Cause Analysis
- Uneven adhesive layer;
- Generation of ESD;
- Adhesive on components;
- Deviation of packing machine sealing knife, excessively high sealing temperature leading to adhesive overflow.
● Handling Methods:
- Measure the thickness of Cover Tape and monitor the adhesive layer thickness during production;
- Use anti-ESD cover tape (surface resistance 10⁶~10⁹);
- Check for adhesive residue on components;
- Check the position of packing machine sealing knife and adjust the sealing temperature to an appropriate level.
■ Core Out-of-Roundness Defect
● Common Cause Analysis
- Uneven coating thickness (T) of adhesive layer;
- Deformed and uneven core at the head end during slitting;
- Impurities falling in during the winding process.
● Handling Methods:
- Measure the coating thickness (T) and implement strict control during production;
- Check the core during inkjet coding and sort out non-conforming products;
- Maintain the working environment clean;
- Product treatment: Rewinding (trial).
■ Burr Defect
● Common Cause Analysis
- Wear of slitting knife.
● Handling Methods:
- Gently scrape off the burrs with a blade if the defect is not severe;
- Replace the slitting knife.
■ Unstable Tensile Value
● Common Cause Analysis
- Uneven coating thickness (T) of Cover Tape adhesive layer;
- Uneven thickness of Carrier Tape (T value);
- Suboptimal adjustment of equipment temperature and pressure during packing;
- Adhesive residue on the packing machine sealing knife.
● Handling Methods:
- Measure the thickness of Cover Tape and conduct thorough process monitoring;
- Measure the thickness of Carrier Tape;
- Readjust the temperature and pressure of packing machine to the optimal values;
- Clean the adhesive residue on the sealing knife.
0 comments