Causes And Elimination Methods Of Fabric Defects

Bad edges, side defects, rotten edges and burrs.

The causes of poor margins.

Zigzag edges.

When the tension of the weft yarn is large and sudden, the inner edge of the selvage is most likely to cause the zigzag edges.

Lotus leaf edge.

When the weft tension is less than warp tension or when the warp tension is loose, the edge is not smooth, and the lotus edge will appear.

Edge weft.

The weft yarn unwinding tension is small, and it is not easy to draw. When the opening and shutting time is not properly matched, the shuttle channel part has a fast opening, or when weft yarn is unwinding, it is affected by the warp yarn hairiness, so that the weft yarn can not be straightened, and the cloth edge is loose, resulting in weft air gap or edge weft defect.

Wrong side.

There is a lack of a complete set of operating rules when the side yarns are not uniform or wrong.

Both sides of the selvage are regularly irregular.

The change of weft tension.

The warp tension is not good.

Poor side support.

Elimination method.

On the basis of strictly controlling the uniform tension of the warp yarn, the tension of the side yarns is increased to ensure the clarity of the openings.

Reasonable opening of opening and weft processing time.

Eliminate the quick opening of the shuttle passageway and solve the defects of the side weft and the bad side.

The weft tension should be increased appropriately to solve the difference on both sides of the selvage.

Improve side yarn penetration operation.

Causes of formation.

The position of the supporting box is too high or too low, and the full width of the fabric is not on the same horizontal line, so that both sides of the fabric edges are projected outwards, and the cloth body is inward concave.

Most of the side defects are caused by the excessive tension of the cloth, the close of the warp and the support of the needling.

The wider the cloth width or the larger the shrinkage, the easier to produce the side defects.

Improper use of the spear rollers, or the untimely processing of the newly purchased side support rollers, resulted in a slow part of the thorns, or sharp pointed crooked hooks, which broke the warp or weft hooks.

In the side support box, there is a blockage in the roller, such as short silk, falling pulp and falling objects, which affects the inflexibility of the roller, causing the speed of the needle roller and the cloth surface to be inconsistent.

The side support box is not well matched and the joint of the supporting box cover and the side supporting box is large or skewed.

The barbed wire is too sharp, too fast, or fast, or dull.

The improper temperature and humidity regulation in weaving workshop is most likely to cause large area defects, especially when weaving viscose fabric.

The let off device is not good, the tension sector rod moves up and down too large, the saw gear support head is worn out, the warp tension is tight and loose, and there are regular side defects.

The tension of the cloth is too tight, and it will produce a side defect when it is slightly pressed.

When the cloth is operated, the diameter of the wood roller is large, and it is easy to rub against the barbed iron sheet on the cloth roller.

The bolt head on the side box cover hits the reed cap, or the iron bar of the impact fly.

After the flat car or the damaged cloth, pull the edge into the side box by hand.

The side brace and the needle roller are well matched and installed correctly.

The loom parts are in normal condition.

Strengthen the operation management of all kinds of work.

Strengthen temperature and humidity regulation.

Several technical improvements.

Single roller is used.

Granulated rubber needle roller or latex tube roller is mixed with iron roller.

Ten copper needling rollers, larger than wood stabbing rolls or iron spines are used to extend the width of ~.CM.

It can eliminate the broken edges caused by poor width and reduce the defect of side brace.

Check whether the wooden thorn roller, the iron thorn roller and the copper thorn roller meet the technical requirements.

The loom is wrapped on both ends of the thorn roller to prevent the cloth head from tightening when the cloth is dropped.

The friction of the surface of the bristle roll produces edge faults.

The thickness of the roller bearing of the loom roller can be reduced to 9.MM from the original 9.MM, so as to prevent the cloth roll diameter being too large and rub the cloth roller to create a similar edge defect.