Causes of screw wear and methods of reducing wear
1, each plastic material has an ideal plasticizing processing temperature range, so the barrel processing temperature should be controlled to bring it close to this temperature range. When the granular plastic enters the barrel from the hopper, it will first reach the feeding section, and dry friction will inevitably appear in the feeding section. When these plastics are insufficiently heated and melted unevenly, it is easy to cause the inner wall of the cylinder and the surface of the screw to wear out. Similarly, The compression section and the homogenization section may cause wear and tear if the molten state of the plastic is disordered.
2, these should be adjusted properly. Because some plastics are supplemented with reinforcing agents such as fiberglass, minerals or other fillers. These materials tend to have a much greater frictional force on metallic materials than molten plastics. When molding these plastics, if a high refractive index is used, the shearing force on the plastic will be increased, and the strengthening will correspondingly produce more shredded fibers. The shredded fibers contain sharp tips. The wear force is greatly increased. When the mineral material slides at a high speed on the metal surface, its scraping effect is not small. Therefore, the vertical should not be adjusted too high.