Screw and Barrel for Extruder manufacturer will show you: 11 common faults and solutions for extruders

The manufacturer of Screw and Barrel for Extruder tells you that there are about eleven common faults in the extruder. The following describes these eleven faults and troubleshooting methods in detail:

1. The temperature rise of the main motor bearing is too high:
1. Reasons:
(1) The bearing is poorly lubricated.
(2) The bearing is seriously worn.
2. Treatment method:
(1) Check and add lubricant.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check the motor bearings and replace them if necessary.
2. The head pressure is unstable:
1. Reasons:
(1) The rotation speed of the main motor is uneven.
(2) The speed of the feeding motor is uneven and the feeding amount fluctuates.
2. Treatment method:
(1) Check the main motor control system and bearings.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check the feeding system motor and control system.
3. Low lubricating oil pressure:
1. Reasons:
(1) The pressure setting value of the pressure regulating valve of the lubricating oil system is too low.
(2) The oil pump is faulty or the oil suction pipe is blocked.
2. Treatment method:
(1) Check and adjust the pressure regulating valve of the lubricating oil system.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check the oil pump and the oil suction pipe.
Fourth, the automatic screen changer is slow or not working
1. Reasons:
(1) Low air or oil pressure.
(2) Air leakage (or oil leakage) in the cylinder (or hydraulic station).
2. Treatment method:
(1) Check the power system of the screen changer.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check the sealing condition of the cylinder or hydraulic cylinder.
5. The safety pin or safety key is cut off
1. Reasons:
(1) Excessive torque of extrusion system
(2) The main motor and the input bearing are not connected
2. Treatment method:
(1) The manufacturer of Screw and Barrel for Extruder tells you to check whether there is metal and other objects in the extrusion system that jam the screw. At the beginning, check whether the warm-up time or the warm-up value meets the requirements.
(2) Adjust the main motor
6. Sudden decrease in extrusion volume:
1. Reasons:
(1) The feeding system fails or there is no material in the hopper.
(2) The extrusion system enters into the hard and jammed screw, so that the material cannot pass through.
2. Treatment method:
(1) Check the material level of the feeding system or hopper.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check and clean the extrusion system.
Seven, the host current is unstable
1. Reasons for production:
(1) Uneven feeding.
(2) The main motor bearing is damaged or poorly lubricated.
(3) A certain section of the heater fails and does not heat.
(4) The screw adjustment pad is wrong, or the phase is wrong, and the components interfere.
2. Treatment method:
(1) Check the feeder and troubleshoot.
(2) Overhaul the main motor and replace the bearings if necessary.
(3) Check whether the heaters are working normally, and replace the heaters if necessary.
(4) The manufacturer of Screw and Barrel for Extruder tells you to check the adjustment pad and pull out the screw to check if there is any interference in the screw.
8. The main motor cannot start
1. Reasons:
(1) There is an error in the driving procedure.
(2) There is a problem with the main motor thread, and whether the fuse is burned.
(3) The interlocking device related to the main motor works
2. Treatment method:
(1) Check the procedure and restart the car in the correct driving sequence.
(2) Check the main motor circuit.
(3) The manufacturer of Screw and Barrel for Extruder tells you to check whether the lubricating oil pump is started, and check the status of the interlocking device related to the main motor. The oil pump cannot be turned on, and the motor cannot be turned on.
(4) The inverter has not discharged the induction current, turn off the main power supply and wait for 5 minutes before starting.
(5) Check whether the emergency button is reset.
Nine, the machine head is not smooth or blocked
1. Reasons:
(1) The Screw and Barrel for Extruder manufacturer tells you that a certain section of the heater does not work, and the material is not plasticized.
(2) The operating temperature is set too low, or the molecular weight distribution of the plastic is wide and unstable.
(3) There may be foreign objects that are not easy to melt.
2. Treatment method:
(1) The manufacturer of Screw and Barrel for Extruder tells you to check the heater and replace it if necessary.
(2) Verify the set temperature of each section, and if necessary, negotiate with the technician to increase the temperature set value.
(3) Clean and check the extrusion system and the machine head.
10. The starting current of the main power is too high
1. Reasons:
(1) The heating time is insufficient and the torque is large.
(2) A certain section of the heater does not work.
2. Treatment method:
(1) The manufacturer of Screw and Barrel for Extruder tells you to use the hand wheel when driving. If it is not easy, extend the heating time or check whether the heaters of each section are working properly.
11. Abnormal sound from the main motor:
1. Reasons:
(1) The main motor bearing is damaged.
(2) A certain SCR in the SCR rectifier circuit of the main motor is damaged.
2. Treatment method:
(1) Replace the main motor bearing.
(2) The manufacturer of Screw and Barrel for Extruder tells you to check the thyristor rectifier circuit and replace the thyristor component if necessary.