The editor of REHOW Machinery tells you that due to the uneven shrinkage between the warp threads, the warp threads in the warp beam will form a disordered arrangement, and the weaving beam, especially the outer layer warp threads, will be embedded in the inner layer. In severe cases, the warp threads on the warp beam will When the layer is split, the two sides will become convex, which is often called the crack axis.
It mostly occurs on the two sides of the weaving shaft, and less in the middle. It usually begins to occur after a few days on the machine. The variety that cracked the axis is mainly polyester FDY, especially the bright yarn. Polyester DTY rarely occurs, while nylon filament does not have this phenomenon. Once the weaving shaft cracks, it will cause serious defects such as warp willow and wide and urgent warp. Therefore, it is one of the most serious semi-finished product quality accidents, which greatly affects the production efficiency and product quality of the factory. For shaft shearing, qualified manufacturers can restart the machine after reversing the shaft, and many manufacturers directly scrap the weaving shaft.
What are the reasons for the cracking of the weave shaft
Reasons for formation:
The main cause of the split axis is the uneven shrinkage between warp filaments. Viewed from the radial direction of the weaving beam, the warp filaments of the inner layer are restricted in shrinkage due to being close to the core tube of the weaving beam; but the farther to the outer layer, the smaller the restraint.
On the other hand, although the stretching time is generally arranged after warp silk sizing, the retraction is not sufficient. Moreover, in the weaving workshop with relatively high humidity, the fixing effect of the size film on the thread strip is weakened after absorbing moisture, and the stress is released. The layer warp absorbs moisture before the inner layer warp, and the moisture absorption in the middle of the warp shaft is greater than that of the two sides. The retraction of the middle warp is higher than that of the two sides, so the two sides will become protruding. With the accumulation of this shrinkage error, it will eventually cause the shaft on both sides to crack. If there is a stress concentration somewhere in the middle of the shaft (such as forming or tension variation), the middle split shaft can also occur with the accumulation of shrinkage errors.
Jiangsu Suzhou Rehow Machinery Co., Ltd. specializes in the production of textile machinery and equipment, which integrates research, design, production, marketing and service. It has a strong technical force, and constantly introduces domestic and foreign technologies, with reliable product quality and stable system. The company uses imported raw materials and component supporting products. The product range of REHOW textile machinery covers almost all types of fabrics, including but not limited to hank machines, looms, loom machines, warping cars, cloth cutting machines, electric warping cars, Warping warehouse, slitting and slitting machine, coiling machine, ultrasonic slitting machine, opening width machine, cloth inspection machine. REHOW Textile Machinery continues to lead the textile industry with its innovative approach and rich experience. If you are interested in us, please contact us now!
Post time: May-26-2023
