To extend the service life of a screw and barrel, consider the following strategies

1. Select Suitable Materials and Surface Treatments:

– **Materials**: Use wear-resistant and corrosion-resistant materials such as high alloy steel and bimetallic compounds.
– **Surface Treatments**: Apply surface treatments like nitriding, chrome plating, or alloy spraying to enhance wear and corrosion resistance.

2. Optimize Screw Design:
– **Screw Structure**: Optimize the design of the feed, compression, and metering zones based on the characteristics of the processed material to reduce unnecessary wear and stress concentration.
– **Screw Diameter and L/D Ratio**: Choose the appropriate screw diameter and length-to-diameter ratio to ensure proper material flow and plastification within the screw.

3. Control Processing Parameters:
– **Temperature**: Properly control the temperature of each section of the barrel to avoid material degradation or excessive screw wear due to overly high or low temperatures.
– **Pressure**: Optimize the working pressure of the screw to prevent mechanical damage to the screw and barrel from excessive pressure.
– **Speed**: Select an appropriate screw speed based on the material and processing requirements to avoid excessive wear from overly high speeds.

4. Use Suitable Materials:
– Material Selection**: Choose plastics and additives that are compatible with the screw and barrel materials, avoiding those with high hardness fillers or highly corrosive additives.
– Pre-treatment**: Pre-treat materials that contain impurities or moisture (such as drying or filtering) to reduce wear and corrosion on the screw and barrel.

5. Regular Maintenance and Care:
– **Cleaning**: Regularly clean the screw and barrel to prevent residue from causing carbon buildup and corrosion.
– **Lubrication**: Maintain appropriate lubrication to reduce friction and wear between the screw and barrel.
– **Inspection**: Regularly inspect the screw and barrel for wear and timely replace or repair components as needed.