NANJING LESUN SCREW CO.,LTD

Maintenance of the Twin Screw Extruder

In order to ensure the safe and stable production of the twin screw extruder and prolong its service life, the maintenance of the twin screw extruder must be strengthened. The basic contents are as follows:


1. Maintenance during operation of the twin screw extruder


(1) It is not allowed to carry debris in the material. Metal, sand and other hard materials are strictly prohibited to enter the hopper and the twin screw barrel;

(2) When opening the cover of air extraction chamber, prevent foreign matter from falling into the twin screw barrel;

(3) There should be sufficient heat preservation time after heating up the twin screw extruder. The extruder can be powered on for operation only when other parts move smoothly.

(4) The screw is only allowed to start at a low speed, and the idling time should not exceed 2 minutes. The feeder should gradually increase the speed after feeding by the starvation method.


2. The daily maintenance of main engine of twin screw extruder


(1) The engine oil and lubricating oil should be changed every 4000h. If the main motor is a DC motor, the carbon brush of the motor should be checked once a month, and a record should be made, and the carbon brush should be replaced if necessary;

(2) The electric control cabinet should be purged once a month, and the wear of the screw and barrel should be checked quarterly, and records should be made;

(3) Check the gears, bearings and oil seals of the gearbox once a year;

(4) When shut down for a long time, the twin screw extruder should receive anti-corrosion and anti-fouling treatments.


After the twin screw extruder fails, it should be repaired according to the steps and methods described in the equipment manual.


  • Cleaning Methods of Extruder Barrel

    Cleaning Methods of Extruder Barrel

    January 15, 2021The extruder should be cleaned regularly after being used for a period of time. Because a long time of using,a lot of stains will be generated inside the barrel. If these stains accumulate for a long time...view
  • Usage Method and Jamming Problem of Extruder Screw Barrel

    Usage Method and Jamming Problem of Extruder Screw Barrel

    November 24, 2021The extruder screw runs for a long time in high temperature, high pressure, high mechanical torque and high friction environment. The process conditions of the screw barrel of the extruder require the...view
  • Adjusting Methods of Screw Clearance of Conical Twin Screw Extruder

    Adjusting Methods of Screw Clearance of Conical Twin Screw Extruder

    August 3, 20211. Install the front and rear supports on the barrel and put the twin screw extruder screw elements on the main frame together.Before shaking, the manual crank handle is supported and the barrel is mo...view
  • Why Are the Screw and Barrel Destroyed?

    Why Are the Screw and Barrel Destroyed?

    November 5, 2021The combined working quality of the screw and barrel has an important impact on the plasticization of materials, product quality and production efficiency. Their work quality is related to the manufac...view
top Inquiry