NANJING LESUN SCREW CO.,LTD

Advantages and Common Problems of Extruder Screw

The extruder screw is the most important part of the plastic machinery and equipment, and it is directly related to the plasticizing effect and output of the plastic machinery.


1. Advantages of extruder screw


The extruder screw material must have high mechanical strength, withstand large torque and must not be deformed under high temperature and high pressure conditions.


The reason is that the rotation of the extruder screw in the barrel is performed under high temperature, high pressure and high torque. Because it strongly pushes the material forward during the rotation process, it must also withstand strong friction, plastic decomposition corrosion, and gas erosion. Therefore, the extruder screw must have these advantages.


2. Common problems of extruder screw


During the rotation of the extruder screw, the plastic is sheared and plasticized mainly through the edge of the extruder screw, and then the plastic is pushed forward, so that the edge of the screw bears huge shear stress and friction.


Due to long-term work under severe conditions, because of wear threaded ribs become smaller, and the gap with the barrel increases, which lead to a decrease in the amount of plastic extrusion. In severe cases, plastic reflow will occur, the plasticizing effect will be reduced, and crystal grains will appear. Then there will be a serious decline in production capacity.

  • Screw Structure and Repairing Method of Extruder

    Screw Structure and Repairing Method of Extruder

    December 10, 2020According to the change of thread lifts and depths of screw groove, the conventional three-stage screw can be divided into three forms:I. Isobathic deepening screwThe change of the depth of the screw ...view
  • Maintenance of Extruder Screw

    Maintenance of Extruder Screw

    April 27, 2022Ⅰ. Selection and installation of extruder screw1. The extruder screw should be made of alloy steel with wear resistance and small deformation when working in a high temperature environment. After fin...view
  • Extruder Screw Arrangement Requirements and Barrel Noise Analysis

    Extruder Screw Arrangement Requirements and Barrel Noise Analysis

    August 25, 2021Ⅰ. The extruder screw arrangement requirementsThe screw arrangement of the extruder must be determined according to the displacement of the extruder. Different specifications of the extruder have dif...view
  • The Cleaning Methods of Extruder Screw

    The Cleaning Methods of Extruder Screw

    August 3, 2021The extruder screw needs to be cleaned under normal conditions such as changing the color or turning on the machine after shutting down, with black spots.Ⅰ. What are the cleaning methods of extruder ...view
top Inquiry