General failure of three screw extruder and its elimination method

The current instability of the main engine of the one and three screw extruders

1. The cause of production:

(1) inhomogeneous feeding

(2) damage or poor lubrication of the main motor bearing

(3) a heater failure, unheated

(4) screw adjustment pad is incorrect, or phase is not correct, component interference.

2. Treatment methods:

(1) check the feeding machine and eliminate the fault

(2) overhaul the main motor and replace the bearing when necessary

(3) check whether the heater is working normally and replace heater when necessary.

The main motor of two or three screw extruder can not start

1. Cause:

(1) the driving program is wrong

(2) there is something wrong with the main motor thread and whether the fuse is burned.

(3) the mechanism associated with the main motor

2. Treatment methods:

(1) check the procedure. Re driving in the right order

(2) check the main motor circuit

(3) check whether the lubricating oil pump is started and check the state of the interlocking device related to the main motor. The pump can't open, and the motor can't be opened.

(4) if the transducer is not released, turn off the main power and wait for another 5 minutes before starting.

(5) check whether the emergency button is reset

Three, three screw extruder head failure or blockage.

1. Cause:

(1) a certain part of the heater is not working, and the material is poorly plasticized.

(2) the operating temperature setting is low, or the molecular weight distribution of plastic is wide and unstable.

(3) there may be a foreign body that is not easy to melt

2. Treatment methods:

(1) check the heater and replace if necessary

(2) verify the temperature of each section, and negotiate with the technician if necessary to raise the temperature setting value.

(3) cleaning and checking the extrusion system and the head of the machine

The main electric starting current of the four and three screw extruder is too high

1. Cause:

(1) the time of heating is insufficient and the torque is big

(1) a certain section of the heater does not work

2. Treatment methods:

(1) when using the hand barrow while driving, if it is not easy, extend the heating time or check whether the heater is working normally.

Five, three screw extruder main motor abnormal voice:

1. Cause:

(1) damage of main motor bearing

(2) a certain SCR damage in the main motor thyristor rectifier circuit.