Extruder feed roller wear

Because the extruder is made of metal and has high hardness, it is subject to vibration, impact and other composite forces during production and operation, causing gaps in the components and causing wear. Traditional repair methods include surfacing, thermal spraying, brush welding, etc., but several methods have certain disadvantages: surfacing will cause the surface of the part to reach a very high temperature, causing deformation or cracks of the part, affecting dimensional accuracy and normal use. In severe cases, it may even lead to breakage; although the brush crossing has no thermal influence, the thickness of the crossing layer cannot be too thick, causing serious pollution and greatly limiting its application. Western countries mostly use polymer composite materials to solve the above problems. Its comprehensive performance and the ability to be machined at any time can meet the use requirements and accuracy after repair. It can also reduce the impact and vibration the equipment endures during operation and extend its service life. Because the material is a "variable" relationship, when an external force impacts the material, the material will deform to absorb the external force, and expand and contract with the expansion and contraction of the bearing or other components, always maintaining a tight fit with the components, reducing the chance of wear. In view of the wear and tear of large extruders, "molds" or "fitting parts" can also be used to repair damaged equipment on site, avoiding the overall disassembly of the equipment, ensuring the matching dimensions of the parts to the maximum extent, and meeting the production and operation requirements of the equipment.