Filament separating device, spinning equipment and polyacrylonitrile carbon fiber precursor

Abstract

The invention discloses a filament separating device, spinning equipment and a polyacrylonitrile carbon fiber precursor. The filament separating device comprises a filament separating rod and a plurality of filament separating grooves formed in the circumferential side wall of the filament separating rod at intervals in the axial direction; each filament separating groove is formed in the circumferential direction; each filament separating groove comprises a groove opening and a groove bottom; and the width of each filament separating groove is reduced from the corresponding groove opening to the corresponding groove bottom. According to the invention, by arranging the filament separating grooves, the polyacrylonitrile carbon fiber precursor is restrained when running in a washing groove and an oiling groove, the interval of tows is kept, the mutual winding of the tows is reduced, a large number of stiff filaments are prevented from being generated in a tow forming stage, broken filaments are prevented from being wrapped in the tows, and continuous spinning operation is ensured; by arranging the filament separating grooves, the filament width can be expanded to the maximum extent, the full bobbin rate of the precursor is increased, and the full bobbin rate of the precursor reaches 85% or above; and the width of each filament separating groove is reduced from the corresponding groove opening to the corresponding groove bottom, so that the bundling property of the tows is kept, the washing and oiling effects of the tows are improved, and the monofilament breakage of the tows is reduced.

Description

technical field [0001] The invention belongs to the technical field of spinning technology, and in particular relates to a spinning device, spinning equipment and polyacrylonitrile carbon fiber precursors. Background technique [0002] The preparation process of polyacrylonitrile carbon fiber precursor generally includes the following steps: preparation of spinning stock solution and spinning, coagulation bath forming, one or more washing and drawing, oiling, drying and winding and winding, usually in the spinning equipment completed. The tow formed in the coagulation bath is wound on multiple spinning rolls in turn, and enters the washing tank and oiling tank under the guidance of the spinning rolls to complete the steps of washing, drafting and oiling. [0003] During the continuous operation of the spinning equipment, the monofilaments in the tow can be relatively scattered and wound on the spinning rolls, so that the distribution of the monofilaments in the tow between ...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the existing spinning equipment, when different types of polyacrylonitrile carbon fiber precursors pass through the surface of the spinning roller, the width of the precursors is quite different, the full package rate is low, the bunching is poor, and it is easy to cause doubling and breaking. In order to solve the technical problems of silk and sticking, a kind of splitting device, spinning equipment and polyacrylonitrile carbon fiber precursors are provided, so that the polyacrylonitrile carbon fiber precursors are constrained when running in the washing tank and oiling tank, which is conducive to maintaining the bundle of tows In the washing section, the tow can be prevented from diverging, and in the oiling section, the tow can be spaced apart, which is easy to operate, maximizes the spread of the silk web, improves the washing and oiling effect of the tow, and reduces the singleness of the tow wire break

Images