Analysis of common defects and causes of knitted fabrics

Analysis of common defects and causes of knitted fabrics

1. Leakage:

During the weaving process, the knitted needle did not hook it to the wool or hook it to the hairy gauze, and then took off the needle hook to form a coil and dispersed. The phenomenon of vertical strip marks and small holes appeared on the cloth surface.

Reason and processing method:

(1) Reasons for needle, bad needle hooks or needle tongue, different tongue lengths, and different sizes of needle. (Change of needle)

(2) The position of the yarn mouth is not good, too high or too low from the needle tongue, inside or outside. (Tuning mouth)

(3) The needle groove is not clean or has a foreign body. The needle groove is too loose or too tightly leads to the weaving needle cannot work normally. (Clean, repair needle slot)

(4) The relative position of the triangle and the triangle of the sedimentation film is incorrect. When the circular is retreated, the phenomenon of weaving through the old coil occurs. In

(5) Excessive gauze tension or strong gauze. (Adjust the influence or bending depth, the yarn is overwax) The tension tension is uneven or too loose. (Adjust the tension of cloth)

Double -sided fabrics are also divided into inside and outer needles. The needle leakage of the needle on the needle disc is leakage needles, and the needle leakage of the needle on the syringe is outer leakage.

2. Broken needle:

A vertical pit or more continuous holes.

reason:

(1) The cause of the needle, the needle is too old, the needle hook, the needle tongue is bad, or the needle is used. (Change of needle)

(2) Individual needle grooves are tight, and needle movement is difficult. (Repair needle groove)

(3) The problem of gauze, coarse yarn, large yarn or random gauze stuck needle hook, etc.

(4) The cloth frame is too tight, and the tension of the roll is too large. (Adjust the tension of cloth)

(5) The location of the yarn is not good. (Position of gauze mouth)

3. Back needle:

During the weaving process, the phenomenon of collision between the needle and the triangle group will damage the syringe (needle disc), knitting needle, etc., and the needle losses will be huge, so you should avoid it in production.

reason: 

(1) The lack of oil and the speed is too high;

(2) At the end of the upper and lower needles, the needle door is not strict, the screws are loose, etc.;

(3) The needle groove is bad, the edges and corners, or there is a broken needle in the needle groove;

(4) The position of the yarn mouth is wrong, or the exploration needle extends into the needle groove and fails;

(5) The tension of yarn suddenly increases;

(6) The sewing between the edges and corners is too large, the aisle is too narrow or the upper and lower edges are not good, and the upper and lower knitted needles are touched;

(7) If the cloth fails to stop, the cloth will cause a hit.

4. Flower needle:

During the circle, the old and new coils overlap together to form a coil. There are continuous or discontinuous pits, gauze, etc. on the cloth surface. Caused by Bao Touta.

reason:

(1) Reasons for needle: crooked needle tongue, different lengths, needle hair, etc.;

(2) Poor corners and corners, insufficient needle pressure and other equipment;

(3) Needle is too pine, defect, etc. (increase the pressure of the slot wall)

(4) The tension of the fabric is too small, the retreat is insufficient, etc.;

(5) The yarn is uneven, and the coarse yarn cannot be removed. In addition, the flower needle formed by the damage of the needle is called a straight flower needle.

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