Section 3 The impact of reed quality on fabrics (4)

1. The impact of reed blade quality on fabrics

(1) The reed tooth material does not meet the requirements, has low hardness or is not wear-resistant, and the bottom of the airflow groove is worn in a short period of time, forming grooves and easily Resulting in yarn breakage and stoppage.

(2) Improper selection of reed tooth thickness. If it is too thin or too thick, it will produce a reed path, stripes will appear on the cloth surface, or the warp will be broken.

(3) If the airflow value is too small, the weft feeding will not be in place, causing the weft to stop, affecting the efficiency. If the airflow value is too low, the weft yarn will be deflected below the notch.

(4) The air flow curve does not meet the requirements, affecting normal startup, and the weft yarn cannot be smoothly introduced into the shed, reducing efficiency.

(5) The reed blade should reach a finish level Ra≤0.1~0.2, and the arc should be very smooth to avoid damaging the delicate yarn.

2. The influence of air pressure value on fabrics

(1) The air flow is unstable and the fluctuation value is large, resulting in unstable weft yarn flight, large weft loss or large movement of the fabric mouth. Cause fabric quality problems.

(2) If the air flow is too large, the yarn will be blown off when encountering weak loops, the core-spun yarn will easily show “white”, and the weft yarn will easily fold back or may be blown out of the notch.

(3) The reed teeth are not rigid enough, which will cause uneven density in the warp direction of the fabric and stripe shadows.

(4) The tooth shape and angle do not meet the requirements, which affects the quality of the fabric, and in severe cases, weaving defects may occur.

3. Other influencing factors

(1) The arrangement of the reed teeth is not parallel, dense and uneven, and it is easy to produce noodle shadows on the cloth.

(2) The reed teeth are tilted and tilted severely, which increases the friction when the warp yarns move vertically up and down, increases the friction between warp yarns, and reduces the quality of the fabric.