Automatic stop and warning device for curling round roll of acrylon spinning and forming machine

An automatic stop and warning device for curling round the roll of an acrylon spinning and forming machine is applicable for detecting, automatically stopping wind-up on the roll failure in the chemical fiber production and warning. The device mainly comprises a testing stand, a light blocking rack and a control system, wherein the testing stand comprises two fixed brackets, a toothed plate shaft, a toothed plate, linkage shafts, an angle increasing plate and a rotating arm; the toothed plate shaft and the toothed plate are connected at the upper ends of the fixed brackets; the linkage shafts are arranged at the upper ends of two fixed brackets ; and the angle increasing plate is fixed on the linkage shaft; the rotating arm and a connecting rod are fixed at the end part of the linkage shaft. The light blocking rack comprises a cross rod, a vertical plate, a bracket, a baffle shaft, a supporting rod and a light blocking plate, wherein the baffle shaft is connected at the upper end of the bracket; the vertical