How to extend the service life of barrel screw?How to extend the service life of barrel screw?
The wear and tear caused by the working of the barrel screw in high temperature and high pressure environment is inevitable, so the wear resistance of the barrel screw should be increased, and ways to minimize the wear of the barrel screw can be increased. Service life.
1. Control the processing temperature of the barrel screw
Granular plastic enters the feeding barrel from the hopper, and it will first reach the feeding section. Dry friction will inevitably occur in the feeding section. When these plastics are insufficiently heated and the melting is uneven, it is easy to cause increased wear on the inner wall of the barrel and the surface of the screw. Similarly, in the compression section and the homogenization section, if the melting state of the plastic is disordered, it will also cause increased wear.
2. The speed should be adjusted properly
Because some plastics are added with reinforcing agents, such as glass fiber, minerals or other fillers. The friction of these substances on metal materials is often much greater than that of molten plastics. The wear force is greatly increased.
3. To detect the sundries in the plastic
Generally speaking, the fresh plastic purchased from the original factory does not have any debris, but after transportation, weighing, drying, color mixing, especially adding recycled materials, it is possible to mix debris. The damage to the screw is self-evident.