As the extruder is made of metal with high hardness, it is subject to vibration impact and other composite forces during production and operation, resulting in clearance and wear of components.
The traditional repair methods include surfacing, thermal spraying, brush crossing, etc., but several methods have some disadvantages: surfacing will make the surface of parts reach a very high temperature, cause deformation or cracks, affect the dimensional accuracy and normal use, and even lead to fracture in serious cases; Although the brush ferry has no thermal effect, the thickness of the ferry layer can not be too thick, the pollution is serious, and the application is also greatly limited. In western countries, polymer composites are widely used to solve the above problems. Its comprehensive performance and machinability at any time can meet the service requirements and accuracy after repair, reduce the impact and vibration borne by the equipment in operation and prolong the service life.