|
Cause |
Countermeasure |
| Insufficient drying |
Maintenance of drying machine and hopper |
|
Mold temperature is too low, injection pressure and pressure holding are excessive |
Select suitable conditions |
| Occurrence of inside stresses caused by thickness deviation and defective mold release |
Eliminate thickness deviation |
|
Notch effect |
Eliminate sharp corners, modify gate position |
| Heat decomposition |
Lower cylinder temperature |
|
Heat decomposition |
Eliminate the material detention |
| Contamination by foreign material |
Cleaning of hopper and cylinder |
