Weft straightener – bending roller weft straightener
The bending roller weft straightener consists of two bending rollers and an adjustment mechanism, as shown in Figure 2-29(a), which can be used to correct arc-shaped weft skew.
During weft adjustment, the hand wheel is rotated through the worm gear to rotate the core axis of the bending roller, and through gear 3 and gear 4, the core axis of the bending roller is rotated in the opposite direction at the same angle to adjust the distance between the two bending rollers to achieve The purpose of straightening the weft.
In Figure 2-29(b), the distance between the roller surfaces from the middle to both ends of the two bending rollers is equal, and there is no weft adjustment effect; in Figure 2-29(c), the distance between the two bending rollers The middle part is smaller than the end part, and the warp tension in the entire width of the fabric is small in the middle and gradually increases toward both sides, causing the running speed of the warp yarn to gradually decrease from the middle to both ends, so that the back arc weft can be adjusted; in In Figure 2-29(d), the distance between the bending rollers becomes smaller at the end than in the middle, and the front arc weft can be straightened.
However, if this type of weft straightener is used improperly, it will cause the fabric to wrinkle and even fail to work properly. Therefore, when installing and using the bending roller weft straightener, it is necessary to properly arrange the working positions of the front and rear cloth guide rollers, and reasonably limit the adjustment angles of the two bending rollers during operation to ensure that the fabric is always on the extended surface and roller surface of the two bending rollers. touch.
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