How to Extend the Service Life of a Barrel and Screw?

Wear of the barrel and screw is unavoidable due to their operation under high temperature and high pressure. Therefore, increasing the wear resistance of the barrel and screw and minimizing wear will extend their service life.

1. Control the Processing Temperature of the Barrel and Screw
When granular plastic enters the barrel from the hopper, it first reaches the feeding section. Dry friction inevitably occurs in this section. If the plastic is not heated sufficiently and melts unevenly, it easily leads to increased wear on the inner wall of the barrel and the surface of the screw. Similarly, in the compression and homogenization sections, if the plastic's melting state is disordered and uneven, it will also cause increased wear.

2. Properly Adjust the Rotation Speed
Because some plastics contain reinforcing agents, such as glass fiber, minerals, or other fillers, these substances often exert a much greater frictional force on metal materials than on molten plastic, greatly increasing wear.

3. Remove impurities from the plastic.
Generally, freshly purchased plastic contains little to no impurities. However, after transportation, weighing, drying, color mixing, and especially the addition of recycled materials, impurities may become present. The damage this can cause to the screw is self-evident.