The Functions of Extruder Screw

1. Advantages of the extruder screw

The material of the extruder screw must have the performances of high mechanical strength, withstanding huge torque and non deformation under high temperature and pressure.


The reason is that the extruder screw elements rotate in the barrel under high temperature, high pressure and large torque. Because it must force the material to move forward during rotation, and it also has to withstand strong friction and corrosion of plastic decomposition gas erosion, the extruder screw must have the advantages in these performances.


2. Common problems of the extruder screw

During the rotation of the screw of the extruder, it is mainly used to shear and plasticize the plastic and push the plastic forward, which will bear huge shear stress and friction. Due to long-term work under harsh conditions, the screw edges are worn and become smaller, and the gap with the barrel increases, which will cause the plastic extrusion volume to decrease. In severe cases, plastic reflux will occur, and the plasticizing effect will be reduced, and crystal grains will appear. Finally, the phenomenon of serious decline in production capacity.

  • Selection Skills of Length-diameter Ratio of Extruder Screw

    Selection Skills of Length-diameter Ratio of Extruder Screw

    January 15, 2021The length -diameter ratio is an important parameter of the extruder screw. There are certain skills in selection. To correctly select the length -diameter ratio, you need to understand the role of th...view
  • Core Technology of Twin Screw Extruder

    Core Technology of Twin Screw Extruder

    February 24, 2021The processing section of the twin-screw extruder is mainly composed of the extruder barrel, screw elements and mandrel. It is the functional area of the twin-screw extruder to complete plasticization...view
  • Design of Extruder Screw

    Design of Extruder Screw

    December 10, 2020As one of the important parts of the main extrusion system of plastic extruder, plastic extruder screw design is very exquisite: not only plays the role of conveying plastics but also plays an extreme...view
  • PLAST EURASIA ISTANBUL 2018

    PLAST EURASIA ISTANBUL 2018

    April 12, 2019Exhibition time:2018.12.05-2018.12.08 Exhibition City:Istanbul, Turkey Lesun Booth No.:10A04view
top Inquiry