Method for producing carbon fiber

Abstract

The invention relates to a production method of a carbon fiber and pertains to the field of organic chemistry. The technical steps of the method are that: multi beams of grey yarns are debatched from a debatching machine, which can be divided into upper layer grey yarns, middle layer grey yarns and lower layer yarns; guide rolls are respectively arranged between the upper layer grey yarns and themiddle layer grey yarns and between the middle layer grey yarns and the lower layer grey yarns; by the towing of the two guide rolls, the grey yarns at the upper, middle and lower layers are arrangedon the guide rolls in fabric surface style; being arrayed in three-layer fabric surface style between an upper furnace plate and a lower furnace plate of the furnace mouth, the three layers of grey yarns are put into an oxidation furnace for pre-oxidation treatment; the distance between layer grey yarns, the distance between the middle layer grey yarns and the upper layer grey yarns, and the distance between the middle layer grey yarns and the upper layer grey yarns are no less than 5mm; the grey yarns in the oxidation furnace react with the hot air blown along different directions of the furnace for concentration ofcarbon element and fiber forming; driven by a conveying roller, the oxidized grey yarns in three-layer fabric surface style are exported from the oxidation furnace by the guide roll at a furnace exit.

Description

technical field [0001] The invention relates to the field of organic chemistry and belongs to the technology of polymer material manufacturing, in particular to a production method for producing high-quality and cheap carbon fibers. Background technique [0002] As we all know, carbon fiber, as a high-performance fiber-reinforced composite material, is widely used in various industrial fields such as aerospace, national defense, sports and leisure products, automobile manufacturing and construction. In recent years, the demand for carbon fiber has shown a trend of substantial growth. But the high price also discourages many ordinary users. The market needs carbon fiber manufacturers to provide a large amount of high-quality and cheap carbon fiber, and the production of high-quality and cheap carbon fiber is the ultimate goal pursued by every carbon fiber manufacturer. The carbon fiber production line for manufacturing carbon fiber is composed of unwinding machine, oxidation ...

AI Technical Summary

Problems solved by technology

At present, the methods that various manufacturers can take are to increase the gap between the raw silk tows, reduce the number of raw silk tows entering the furnace, or increase the flow speed of hot air, and the wind speed is high, which is easy to blow the fibers apart. In this way, although the mechanical performance index of carbon fiber is guaranteed to a certain extent, the output and quality of surface fiber will be greatly reduced, and the production cost will increase sharply.

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