- Issue: Sink marks are depressions or indentations on the surface of the bottle, caused by uneven cooling or insufficient material thickness in certain areas.
- Possible Causes:
- Uneven cooling rates.
- Insufficient material thickness.
- Poor mold design.
- Troubleshooting Steps:
- Inspect the mold design for even material distribution.
- Review the cooling process for any uneven temperatures.
- Check material thickness in areas prone to sink marks.
- Solutions:
- Adjust the cooling time and temperature to avoid uneven solidification.
- Review the mold design to ensure proper material flow and distribution.
- Increase material thickness in areas prone to sink marks.
- Preventive Measures:
- Use mold simulation software to ensure uniform cooling and material flow.
- Regularly inspect molds and adjust cooling rates to prevent sink marks.
