The weft feeder is a device commonly used on shuttleles […]
The weft feeder is a device commonly used on shuttleless looms to adapt to high weft insertion rates. It is a typical mechatronics device. Driven by its own motor, the weft feeder pre-unwinds the weft from the bobbin to its storage drum, and when weft is inserted, the weft is then withdrawn from the storage drum. After adopting the weft feeder, the unwinding tension of the weft yarn is greatly reduced, and the influence of the unwinding diameter change is eliminated, and the tension uniformity is improved. It can also be said that the function of the weft feeder is to store an appropriate amount of weft thread in the weft feeder in a good winding state in accordance with the requirements of the weaving process to supply the weft thread required for each weft insertion.
The yarn storage drum of the weft feeder is a cylinder with a smooth surface, or a cone or prism with a small cone angle. During weft storage, the yarn is wound parallel to the surface of the yarn storage drum with uniform low tension, and the yarn winding speed of the weft storage device can be adjusted appropriately to make the process of unwinding the yarn from the bobbin almost continuously. The maximum unwinding speed is reduced to the original 12-13, so the unwinding tension of the weft yarn is greatly reduced. In addition, the diameter of the storage drum does not change like the diameter of the bobbin, and a very balanced weft tension can be obtained. Therefore, after the use of the weft feeder, the weft yarn tension during the weft insertion process is small and uniform. The weft feeder has become an indispensable part of the weft insertion system.It plays an important role in reducing the rate of weft breakage and reducing weft defects in the fabric