Seven Common Fault Analysis And Troubleshooting（2）

Failure Phenomenon

4 There is dirt in the extruded product

Cause

1 There is dirt in the material
2 Excessive carbon deposits on the extruder screw

Approach

1 Replace material
2 To clean the screw, the lighter can be directly squeezed out and cleaned with screw cleaner, and the heavy one can be disassembled and cleaned manually

Failure Phenomenon

5 The main motor power supply of the extruder is large

Cause

1 A certain section of the heater does not work, and the torque is unstable.
2 The main motor bearing is poorly lubricated or damaged, and the vibration is large.

Approach

1 Check whether the heaters of each section are damaged, if so, whether the wiring of the replacement heater is correct or firm
2 Check the motor bearing, add lubricating oil or replace the bearing

Failure Phenomenon

6 The extrusion material is unstable

Cause

1 Bridging the raw material feeding port;
2 The rotation speed of the main motor is uneven and fluctuates;
3 The heating and cooling system is not well matched or the thermocouple error is too large.

Approach

1 Clear the bridging of the discharge opening of the hopper
2 Check the main motor and control system
3 Adjust the heating power, check the contact and installation of the thermocouple, whether the thermocouple is damaged, and replace the thermocouple if necessary

Failure Phenomenon

7 The machine head discharge is unstable or blocked

Cause

1 Poor plasticization of materials
2 A certain section of the heater does not work or the molecular weight distribution of the plastic is wide
3 The operating temperature setting is low and unstable
4.Foreign objects that may not easily melt

Approach

1 Replace and check the heater if necessary
2 Negotiate with the craftsman if necessary
3Verify the set temperature of each section and increase the temperature set value
4 Clean and check the extrusion system and the head