Warpage Part Distortion |
| 1. Reduce temperature of plastic material |
| 2. Extend mold closing time |
| 3. Check if temperature of both core and cavity molds is the same |
| 4. Check if finished parts are placed properly as well as all the JIG used |
| 5. Increase injection pressure and cooling time |
Poor Dimensional control |
| 1. Decrease the number of mold cavity |
| 2. Enlarger material feeding place |
| 3. Balance the disposition of runners, gates and cavities |
| 4. Adjust a fixed cycling time |
| 5. check the pressuring and electricity system of the injection machine |
Voids |
| 1. Reduce injection speed |
| 2. Increase injection pressure |
| 3. Increase mold temperature |
| 4. Enlarge the gate, major runners and minor runners |
| 5. Check if materials are pre-dried properly |
| 6. Lower pipe temperature |