Causes of damage to Single Screw Extruder Screw and Barrel

Many people want to know the cause of the damage of Single Screw Extruder Screw and Barrel. Let me take you to know more about it.

1. The screw rotates in the rubber barrel, and the friction between the material and the two causes the working surface of the screw and the barrel to gradually wear out: The manufacturer of Single Screw Extruder Screw and Barrel tells you that the diameter of the screw is gradually reduced, and the diameter of the inner hole of the barrel is gradually increased. big. In this way, the matching diameter gap between the screw and the barrel increases a little as the two gradually wear. However, because the resistance of the head and the splitter plate in front of the barrel has not changed, this increases the amount of flow of the extruded material when it advances, that is, the amount of material flowing from the diameter gap to the feeding direction increases. As a result, the output of the extruder is reduced. This phenomenon increases the residence time of the material in the barrel and causes the material to decompose. The manufacturer of Single Screw Extruder Screw and Barrel tells you that if it is polyethylene, the hydrogen chloride gas produced by decomposition strengthens the corrosion of the screw and barrel.
2. The manufacturer of Single Screw Extruder Screw and Barrel tells you that if there are fillers such as calcium carbonate and glass fiber in the material, it can accelerate the wear of the screw and barrel.
3. The manufacturer of Single Screw Extruder Screw and Barrel tells you that because the material is not plasticized uniformly, or metal foreign matter is mixed into the material, the screw torque is suddenly increased. This torque exceeds the strength limit of the screw and the screw is twisted. This is an unconventional accident damage.
The above is the reason for the damage of Single Screw Extruder Screw and Barrel, I hope it will help you.