Screw and Barrel for Rubber Extruder takes you to understand: the reason for the fracture of the screw and the maintenance method

The quality of the Screw and Barrel for Rubber Extruder directly affects the quality and production efficiency of the product. When these two parts are severely worn or broken, they need to be repaired. Today we will focus on the reasons for screw fracture and maintenance methods.

Analysis of the cause of fracture:
1. Macro reasons
The Screw and Barrel for Rubber Extruder tells you that the screw fracture of the rubber extruder is a damage caused by low-cycle fatigue. The Screw and Barrel for Rubber Extruder tells you that the source and the expansion area of ​​the fatigue crack can be clearly seen on the broken screw surface. The fractured area is often the source of fatigue cracks at the root and surface cracks of the screw. The fatigue cracks will continue to spread out under the action of time.
2. Micro reasons
Screw and Barrel for Rubber Extruder tells you that through microscopic observation of the screw fracture, the fatigue streaks in the fatigue crack growth zone show a directional intermittent or continuous distribution. Usually a fatigue streak corresponds to a stress cycle, and it is basically a brittle streak.
Screw and Barrel for Rubber Extruder tells you that the area of ​​instantaneous fracture can see some river patterns, cleavage cracks and secondary cracks on the section, but no dimples.
Maintenance method introduction:
How to repair the rubber extruder screw after it is broken? Screw and Barrel for Rubber Extruder tells you that we can re-manufacture a new screw based on the old screw. It is also possible to thermally spray the wear-resistant alloy on the surface of the screw, and then polish it to improve the corrosion resistance and wear resistance of the screw.
Screw and Barrel for Rubber Extruder tells you that we can also plate a layer of hard chromium on the surface of the screw. This molecule of chromium has good corrosion resistance and wear resistance, but the hard chromium layer is relatively easy to fall off.
After the rubber extruder screw is broken, whether to replace or repair it can be determined according to the price. If the repair cost is more expensive than replacing the new one, it is better to replace it with a new one.