A weft accumulator is a device for holding the thread that is being used for weaving. This device uses a prewinder, a drum and a winding tube. In a weft accumulator, a thread reserve is located at the end of the drum, and this thread is led through the winding tube through a thread-freeing device. A second thread section is then led through the winding tube. This alternate thread is then attached to a second yarn package and is then ready to join the second thread section at a predetermined location.
A thread break is detected by a thread break detection device 10 on the control unit 20 of a weft accumulator. The thread end is then joined to the second section and the threading operation begins again. The thread break is then switched to a second weft accumulator. After the second weft accumulator is threaded, it is time to rethread the previous weft accumulator.
Weft accumulators are often used to supply the pick insertion assembly of a weaving loom. Each weft accumulator has three components: a weft supply, a drawing off device, and a perforated cylindrical tube. The draw-off weft is supplied into the tube by a fluid blowing device. Another component is a clamping device that opens and closes the end of the tube. When the clamping device is closed, it supplies the weft thread to the pick insertion assembly.
A weft accumulator is a fundamental component of the weaving process and a key element in obtaining the perfect fabric. This device also helps reduce tension variations in yarn insertion. A well-functioning weft accumulator can also be enhanced by unique accessories. Its ability to regulate cutting is one of its most important functions.
Another component of a weft accumulator is a thread reserve. This component prevents a broken section of thread from being drawn out of the pick insertion device. It holds a portion of the broken thread that is attached to the yarn package. A thread reserve can also be used to join a broken thread with another end.
The weft thread tension is measured by measuring the amount of force on the weft thread. The first maximum corresponds to the start of the projectile, while the second and third maximums are smaller. The force between the two weft threads increases as the weft thread linear density increases.
The method of the weft thread is preferably done by forming a predetermined length in a tube with perforations 10. In a weft accumulator, the weft thread is blown axially into the tube through spiral grooves in the nozzle.
The tension between the weft thread and the main shaft is determined by the tension force on the weft thread. To determine this, the weft thread end must drag through the conductors, while a definite tension force must be applied to the end closest to the weft accumulator. The ratio between the definite force and the drag force is the drag tension force.
