|
Type of Defect: |
Sink Mark |
|
Description: |
Thickness of the disk becoming thinner than the mold cavity |
|
Observation Method: |
|
|
Recommendation Upon Observation: |
|
|
Other Evaluation Method: |
|
|
|
|
Cause |
Countermeasure |
| Short shots(lack of feed) caused by unsuitable molding conditions |
Adjust cylinder temperature (too low) |
|
Short shots(lack of feed) caused by unsuitable molding conditions |
Adjust injection pressure (too low) |
| Short shots(lack of feed) caused by unsuitable molding conditions |
Adjust injection speed (too slow) |
|
Short shots(lack of feed) caused by unsuitable molding conditions |
Adjust mold temperature, too low |
| Shrinkage caused by unsuitable molding conditions |
Adjust cooling time span (too long) |
|
Shrinkage caused by unsuitable molding conditions |
Adjust cylinder temperature (too high) |
| Shrinkage caused by unsuitable molding conditions |
Adjust holding pressure (too low) |
|
Shrinkage caused by unsuitable molding conditions |
Adjust holding time span (too short) |
| Shrinkage caused by unsuitable molding conditions |
Adjust mold temperature (too high) |
|
Shrinkage caused by unsuitable molding conditions |
Check gate dimension |
