Failure analysis of twin-screw extruder

The main current of the twin-screw extruder is unstable. There are many reasons for this situation. It may be that a certain section of the heater has failed and there is no heating function; it may be that the feeding is uneven; it may be that the screw adjustment pad is wrong, or the phase No; it may also be that the bearing of the main motor is poorly lubricated or damaged. In view of this situation, it is necessary to check one by one, check the heater, bearing, screw and feeding situation. If the heater is damaged, replace the heater; if the feeding is uneven, check the feeder and remove the fault; if there is a problem with the adjustment pad of the screw, you can see if there is any interference; If the bearing is damaged, it is necessary to replace the bearing.

The main motor of the twin-screw extruder makes an abnormal sound. The reason for this abnormal sound is mainly from two aspects. On the one hand, a certain thyristor is damaged in the thyristor rectifier circuit of the main motor; On the other hand, it may also be due to damage to the bearings of the main motor. The solution to this situation is: first check the thyristor rectifier circuit of the main motor to see if there is any damage, and if necessary, replace the new thyristor component; if it is the bearing of the main motor of the plastic extruder If it is damaged, it can also be replaced with a new bearing.