Pultrusion system for preparing fiber reinforced polymer rod

Abstract

The invention belongs to the technical field of composite material processing, and particularly relates to a pultrusion system for preparing a fiber reinforced polymer rod. The system comprises a yarnball placing frame, a glue dipping device, a pre-forming device, a secondary forming and winding device, a traction device and a high-temperature treatment device which are sequentially connected, wherein the high-temperature treatment device comprises a matrix resin heating device, a front preheating device, a rear preheating device, a high-temperature gel device, a high-temperature curing forming device and a cooling device. The pultrusion system is simple in structure and convenient to operate, the fluidity of resin among fibers can be changed for multiple times, so that the resin is redistributed among the fibers for multiple times, the wettability of the resin on the surfaces of the fibers and the uniform distribution of the resin among the fibers are greatly improved, the mechanicalperformance of the FRP rod is fully exerted, and the discreteness of the mechanical performance of the FRP rod is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of composite material processing, and in particular relates to a pultrusion molding system for preparing fiber-reinforced polymer rods. Background technique [0002] The corrosion of steel bars, steel anchors and steel strands in the service environment seriously affects the normal service status of structures or components, and the maintenance and repair of these degraded structures or components in the later period consumes huge manpower and financial resources; Natural resources are increasingly depleted, so a new type of material is urgently needed to replace steel bars, steel anchors and steel strands to solve the problems faced by current structures or components. [0003] Fiber-reinforced polymer (FRP) rods (tendons / bolts / strands) have essential properties such as high specific strength, high specific stiffness, corrosion resistance, non-magnetization, fatigue resistance and strong designability, and ...

AI Technical Summary

Problems solved by technology

However, the high-temperature treatment link in the process of preparing FRP rods in the existing FRP rod production equipment is too simple, resulting in uneven distribution of resin between fibers, inconsistent heating of preformed FRP rods during high-temperature curing, and excessive or insufficient curing of the resin. And a series of unfavorable factors such as micro-cracks caused by the shrinkage of the solidified resin after the high-temperature FRP rods leave the high-temperature zone lead to a decrease in the mechanical properties of the FRP rods and its great discreteness.

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