The design of the injection molding machine screw needs to consider multiple factors to achieve wear resistance to glass fiber. Here are some design considerations:

(1) Material selection: Choose materials with good wear resistance and corrosion resistance, such as 38CrMoAlA, SKD61, etc.

(2) Diameter and length: Determine the diameter and length of the screw according to the model of the injection molding machine and the size of the injection molded parts. A larger diameter can provide greater injection capacity.

(3) Pitch and depth ratio: Determine the pitch and depth ratio according to the material and shape of the injection molded parts. A larger pitch and depth ratio can provide stronger plasticizing ability. (4) Barrel structure: Adopt a segmented heating structure to improve heating efficiency and plasticizing effect.

(5) Surface treatment: Perform special treatments on the surface of the screw and barrel, such as chrome plating, spraying, etc., to improve wear resistance and corrosion resistance.

For wear resistance to glass fiber, the following design elements can be considered:

(1) Screw flight width: Wide screw flights can provide better wear resistance, but injection capacity and plasticizing effect need to be balanced.

(2) Screw flight angle: Using a large-angle screw flight can improve wear resistance, but it is necessary to ensure that the plasticizing effect is not affected.

(3) Homogenization effect: Optimize the design of the homogenization zone to ensure that the glass fibers are fully dispersed and improve wear resistance.

(4) Surface treatment: Adopt hard surface treatment, such as nitriding, tungsten carbide coating, etc., to improve wear resistance. In summary, the design of the injection molding machine screw needs to consider multiple factors to achieve wear resistance to glass fiber. It is necessary to select appropriate materials, determine the diameter and length, pitch and depth ratio, barrel structure and surface treatment, etc., and carry out specific design for wear resistance to glass fiber.