The Reasons Why the Extruder Screw Suddenly Does Not Rotate

During the extrusion process, the extruder screw may suddenly get stuck. At this time, if the protection device of extruder does not work, the operator should immediately stop the operation. More commonly, the screw can still rotate, but the speed slows down, and at the same time a harsh metal scraping sound is made, the current rises sharply, and the operator should also stop the machine immediately.

Then, the reasons why the extruder screw suddenly does not rotate are as follows:

1. Foreign matter enters the extruder barrel and blocks the screws. If it is a ferrous metal foreign body, it will cause huge damage to the screw and barrel.

2. The screw and barrel are deformed.

3. The temperature of the lens barrel of the extruder barrel is too low, or the filter plate is blocked, causing the pressure of the lens barrel to rise sharply, so that the screw is deformed.

4. The design of the screw spring barrel of extruder screw is unreasonable. If the compression ratio of the screw design is too large, it is easy to deform the screw in use.

5. The thermal expansion coefficient of the extruder screw barrel is too different from the extruder screw material used. When the extruder barrel is heated, the barrel will cool. If the extruder barrel is not cooled, it may be locked.

Our company is specialized in the production of parallel and co-rotating modular screw elements, barrels and shafts, involving various types with diameters between Ø20mm and Ø300mm. After more than ten years of vigorous development, our company now has several sets of advanced CNC machine tools and processing equipment dedicated to processing screws. Now our processing business has basically realized intelligence and automation. Advanced processing methods, strong technical force, and sophisticated processing technology ensure that the quality of each production technical target can fully meet customer needs.

  • From Which Aspects is the Output of Extruder Screw Compared?

    From Which Aspects is the Output of Extruder Screw Compared?

    August 3, 2021Output is a main indicator to measure the performance of the extruder screw. However, it is of little significance to only emphasize the percentage increase in the output of the improved screw over th...view
  • The Key Points of Starting the Extruder

    The Key Points of Starting the Extruder

    January 15, 2021When using the extruder, it is necessary to frequently check whether there is foreign matter in the barrel which such as sand or metal powder is not allowed to be mixed into the raw materials. Check t...view
  • The Effect of Too Large Assembly Gap of the Screw in the Barrel

    The Effect of Too Large Assembly Gap of the Screw in the Barrel

    August 25, 2021If the assembly gap in the barrel is too large, what effect will it have on the screw of the extruder? 1. Part of the melt will stay in the barrel of extruder screw for a longer timeIf the working sur...view
  • How to Protect the Screw and Barrel?

    How to Protect the Screw and Barrel?

    June 8, 2021What are the ways to protect the screw and barrel? Let's take a look together!Corrosive, abrasive and high-temperature resistant resins may unknowingly damage the screw and barrel. For example, so...view
top Inquiry