A Weft Feeder is a device that separates the loops of yarn on the cylinder of a weaving machine. The device consists of a cylinder and a swivel arm, which is keyed to the driving shaft. The swivel arm has a rectilinear design and is composed of a composite material.
The braking element 6 of the Weft Feeder comprises a plurality of narrow tongues arranged side-by-side on the frustoconical surface. The tongues are preferably made of metal drop-wires but may also be made from a material that has a high degree of flexibility. The tongues are connected to each other along a major circumference of the cylinder and then join to form a broad surface.
A yarn braking device can be installed on the weft feeder. The weft feeder is designed to automatically stop when the yarn reaches a predetermined limit. This device can be mounted on the cup support 8 or fixed to it. This bracket may be adjustable along the axis of the weft feeder or drum.
The weft feeder is an essential piece of equipment in weaving. It ensures a uniform weft tension and minimizes the variations in tension caused by yarn insertion. Its high-performance torque control system and double photocell for winding counting reduce power consumption. The weft feeder can also be equipped with an electronic brake system.
The fixed drum weft feeder is a common type. This feeder is simple to use and provides large capacity. Its speed can reach up to 1000 m/s, and its reed width can reach two meters. Different types of weft yarns require different arrangements. While flat and ordinary weft yarns can be arranged close to each other, knot yarns require spacing between them so they do not overlap.
Another type of Weft Feeder is called measuring weft feeder. It is placed between the yarn feed spool and the loom and has an electrical motor that controls a rotating arm that winds the weft yarn into even turns. In addition, it features a centralized control system. The measuring weft feeder also features adjustable cross section.
Weft feeders can be used with either jet or projectile looms. The latter type does not require a weft clamping device. The tensioner and damping ring at the unwinding end offer tension and resistance to the weft. A weft feeder is a simple, inexpensive option.
