Acrylonitrile-based fiber bundle manufacturing method

The present invention addresses the problem of providing a method with which, when manufacturing an acrylonitrile-based fiber bundle by means of a dry-wet spinning method, it is possible to stably manufacture a high-grade, high-quality acrylonitrile-based fiber bundle even if the traveling speed of a coagulated yarn is increased or the number of discharge holes in a cap is maximized in order to increase the production efficiency. As a solution, the present invention provides an acrylonitrile-based fiber bundle manufacturing method in which, after pushing a spinning stock solution out into the air from a plurality of discharge holes in a cap 1, the spinning stock solution is moved downward into a coagulating bath solution 12 retained in a coagulating bath 2 to form a coagulated yarn 3 and, after folding back the coagulated yarn 3 by using a turning guide 4 disposed in the coagulating bath solution 12 below the cap 1, the coagulated yarn 3 is taken out of the coagulating bath solution 12 to the outside thereof.