Views: 0 Author: Site Editor Publish Time: 2026-07-17 Origin: Site
Defective warp-knitted mesh often arises during production due to machine malfunctions, improper operation, or component wear, thereby compromising the mesh's overall quality, corporate profitability, and market safety. Consequently, this article outlines the common causes of such defects and discusses corresponding solutions.
Causes of broken end include yarn-related issues such as kinks and uneven thickness, as well as mechanical factors—specifically, friction between the yarn guide and the latch needle, the yarn guide being set too low, excessive warp tension, insufficient guide bar swing amplitude, inaccurate guide bar shogging timing, and insufficient guide bar return force.
The mechanical troubleshooting method involves adjusting the needle position, reducing yarn tension, increasing the guide bar swing amplitude, modifying the rise and fall slopes of the chain links, and adjusting the guide bar pressure spring hook.
Common causes include the yarn guide needle not being installed correctly, the guide bar being positioned too high, or low warp tension (often occurring at the fabric edges).
Remedial measures include adjusting the position of the yarn guide needles, lowering the guide bars, and controlling the tension.
The primary cause is insufficient length of the lining yarn—specifically, excessive yarn tension or improper positioning of the guide bar.
Solutions include measures such as reducing warp yarn tension and adjusting the position of the guide bars.
The primary cause is that, during the yarn-lapping process at the back of the guide bar needles, the shogging occurs too early; this results in a few yarns being laid into the hooks of the latch needles, thereby forming irregular winding.
The solution involves measures such as adjusting the position of the knitting needles or guide bars.
Stoppage horizontal stripe is primarily caused by sudden changes in weaving speed.
During operation, manual shutdowns should be avoided as much as possible, except when stopping is unavoidable—such as in the event of a yarn break.
Broken needle primarily occurs due to machine malfunctions or excessively high yarn tension.
The solution involves measures such as improving the competence of operators and reducing tension.
The primary causes are improper adjustment of yarn tension—specifically, excessively low chain-stitch tension combined with excessively high tension on the weft-insertion and pile yarns.
The remedy is to adjust the yarn tension to an appropriate level. An excessively high lapping device position is also a primary cause of tuck stitch; lowering the lapping device height so that it holds down the inlaid yarn and prevents it from lifting can effectively prevent this issue.
Apart from the aforementioned cases, there are many reasons for the formation of defective products, and specific situations require specific analysis.However, selecting a high-quality machine can largely prevent the occurrence of defective products. At the same time, it is essential to focus on staff training and ensure proper machine maintenance.
