NANJING LESUN SCREW CO.,LTD

The Reasons for the Unstable Extruder Screw Speed

Ⅰ. Common causes of unstable working speed of extruder screw


1. The driving V-belt is severely worn, causing slipping during work.


2. The center distance of the V-belt drive pulley is too small, so that the V-belt drive cannot correctly friction drive with the trapezoidal slope of the pulley.


3. The temperature of the heating material in the barrel is low, and the raw material is not uniformly plasticized, which causes an increase in the working load torque of the extruder screw, and unstable screw speed of the extruder .


4. The thrust bearing of the extruder screw is damaged.


Ⅱ. Impact of unstable speed of the extruder screw on the quality of plastic products


1. The geometric shape and size error of the product is large.


2. The product will often appear horizontal wrinkles.


3. The surface of the product is rough, brittle, or partially hard.


Our company specializes in the production of parallel and co-rotating modular screw element, barrels and screws, covering various models from Ø20mm to Ø300mm. After ten years of vigorous development, our company now has a number of advanced CNC machine tools and special processing equipment for screw manufacturing. Now our machining operations have basically realized intelligence and automation. Advanced processing methods, strong technical force, and sophisticated processing technology ensure that the quality and technical indicators of each production fully satisfy customers. If necessary, please consult.

  • Common Materials and Strength Calculation of Screw Barrel

    Common Materials and Strength Calculation of Screw Barrel

    December 30, 2021I. Extruder screw material1. Requirements for materialsIt can be seen from the extrusion process that the extruder screw works under high temperature, certain corrosion, strong wear and high torque. T...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
  • 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
  • How to Clean the Extruder?

    How to Clean the Extruder?

    February 24, 2021Ⅰ. The structure of extruder screw and extruder barrelThe extruder screw is the key component of the extruder and the heart of the plastic extruder. Due to the need of assembly, there is a matching g...view
top Inquiry