Injection Injection Molding
Splay Marks, Silver Streaks.
Recommended Actions
Possible Solutions
Check for contamination.
Decrease the melt temperature.
Decrease nozzle temperature.
Dry resin pellets before use. As per the manufacturers recommendations
Incorrect storage of pellets Moisture on the pellets could be transferred into the melt, especially if the resin is not normally pre-dried.
Raise the mold temperature. This will prevent condensation on the mold walls from being carried into the melt.
Ensure the mold is not leaking water onto the cores or cavities. Again this will prevent condensation on the mold walls from being carried into the melt.
Relocate gates on or as near as possible to thick sections.
Shorten overall cycle.
- Possible Solutions
- Check for contamination.
- Decrease the melt temperature.
- Decrease nozzle temperature.
- Dry resin pellets before use. As per the manufacturers recommendations
- Incorrect storage of pellets Moisture on the pellets could be transferred into the melt, especially if the resin is not normally pre-dried.
- Raise the mold temperature. This will prevent condensation on the mold walls from being carried into the melt.
- Ensure the mold is not leaking water onto the cores or cavities. Again this will prevent condensation on the mold walls from being carried into the melt.
- Relocate gates on or as near as possible to thick sections.
- Shorten overall cycle.
Related Knowledge
Source
Imported from Molding Defects All Platforms spreadsheet