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What are the reasons for screw damage during the use of single screw plastic granulator


What are the reasons for screw damage during the use of single screw plastic granulator

What are the common causes of damage to single-screw plastic granulators? Taking this question and then see below, the single-screw plastic granulator is a common plastic mechanical equipment, the combined work quality of the two parts of the granulator single screw and the barrel, the plasticization of the material, the quality of the product and Production efficiency has an important impact. The quality of their work is related to the manufacturing precision and assembly clearance of the two parts. When the wear of the two parts is severe and the output of the granulator is reduced, the single screw and barrel of the single screw granulator should be arranged for maintenance.
Reasons for damage to single screw and barrel of single screw granulator
1. The single screw of the single-screw granulator rotates in the barrel, and the friction between the material and the two causes the working surface of the single screw and the barrel to wear gradually: the diameter of the single screw is gradually reduced, and the diameter of the inner hole of the barrel is gradually increased. . Thus, the matching diameter gap between the single screw and the barrel increases little with the gradual wear of the two. However, since the resistance of the front head and the splitter plate of the barrel is not changed, this increases the amount of residual material when the material is advanced, that is, the amount of material flowing from the diameter gap to the feed direction increases. As a result, the granulator production is reduced. This phenomenon causes the residence time of the material in the barrel to increase, causing the material to decompose. In the case of polyethylene, the hydrogen chloride produced by the decomposition enhances the corrosion of the single screw and the barrel.
2. If there are fillers such as calcium carbonate and glass fiber in the material, it can accelerate the wear of the single screw and barrel of the single screw granulator.
3. Since the material is not plasticized uniformly, or metal foreign matter is mixed into the material, the single-screw rotational torque of the single-screw granulator suddenly increases, and the torque exceeds the strength limit of the single screw, so that the single screw is broken.
Single screw granulator is the main component of single screw granulator. Single screw granulator can be divided into single screw granulator, double single screw granulator and multi single screw granulator. The section mainly lists the causes of common single-screw granulator damage, helping everyone to find out the problem and solve the problem as soon as possible

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