CH 
Common Fault Analysis and Trouble Shooting for Extruders
Font: Large Small Date:2013/05/03
| Trouble | cause | Solution |
| 1.No material discharging when adding soybeans | 1. Too narrow the gap between the inside cone of the outlet die and the outside cone of the cone shaft. 2. Too much material is put in within short time. |
1. Press the outlet die and the cone shaft and back screw for 3-4 turns. 2. Reduce the feeding speed. |
| 2.Too course or too the big extruded soybean | Too big gap between the inside cone of the outlet die and the outside cone of the cone shaft. | Adjust as the above solution or replace it with a small hole die. |
| 3.Temperature in the extruding chamber fails to reach the standard | 1. Too small diameter of the resistance ring or the resistance ring is worn out. 2. Not adding steam or the steam quality is low. |
1. Replace a new resistance ring. 2. Open the steam valve or check the steam pipeline. |
| 4. Capacity decreases | Resistance ring is worn out. | Replace |
| 5. No output during normal operation | 1. Too much material is put in within short time. 2. Outlet die is blocked by metal or hard material. |
Stop the machine and remove blockage. |
| 6. The diameter of the pellet is too long. | The outlet die hole is worn out. | Change the die. |
| 7. The diameter of the pellet is too short. | The outlet die hole is too small. | Change the die. |
| 8. The pellet is too long or too short. | The speed of the cutter is not well adjusted. | Readjust the cutter. |
| 9. Material splashing during feeding | Too fast feeding in material or not smooth feeding or blockage happened. | 1. Control the feeding speed. 2. If blocked, do as 5. |
1. Feeder
2. Conditioner
3. Driving System
4. Engine Base
5. Extruding System
Structure Diagram of Extruder SPHG2500a
