what method can reduce the barrel screw wear?

1. Select small particle recycled material processing:

for the guide rotating twin screw, the material should be transported along the axial direction, just like a pair of calender rolls. The screw is subjected to outward and upward forces, then the screw is pushed onto the barrel, causing the barrel screw to wear, especially when processing materials.

It is generally believed that the screw is subjected to outward and upward forces is the main cause of wear. Once the material particles are larger, the wear is more serious, so try to choose materials with small particles.

2. Processing of hard PVC particles:

rigid PVC particles is substantially the same as the effect of the friction produced by the recycled particles on the barrel screw. However, there is still a difference between the two. The shape and size of the hard PVC particle material are more uniform than the recycled material. Therefore, the wear of the barrel screw can be reduced if the particle size is as small as possible during processing.

3. Packing:

In order to reduce the production cost of PVC pipes, more calcium carbonate is often used in the formula, and calcium carbonate causes wear of the barrel screw, especially when the amount of additives is large.

the content and quality of calcium carbonate have a great influence on the degree of wear, especially the unreasonable amount of lubricant in the formula, which leads to the slowing down of the plasticizing process and the acceleration of wear. Therefore, attention should be paid to the amount of calcium carbonate and lubricant during processing. Add to minimize the damage to the barrel screw.