Projectile Loom

With this weft insertion principle, the weft thread is pinched in the projectile and then shot through the shed. After insertion, the thread is tensioned tightly and cut off the external weft bobbin. The projectile is transported back outside the shed. Therefore, one weaving loom operates with multiple circulating projectiles (Fig. 4.21). 

---

Projectile loom n. A shuttleless loom that uses small, bullet-like projectiles to carry the filling yarn through the shed. Fill is inserted from the same side of the loom for each pick. A tucked selvage is formed. Also see weft insertion. 

Woven geotextiles are produced from synthetic-fibre yarns, mainly PET or PP, and natural fibre yams, largely jute or coir, such as the Sulzer projectile loom P7150, used to produce woven fabric in widths of 190-540 cm. ... 

According to the principle of weft insertion, weaving looms can be divided into shuttle looms (Fig. 4.13), projectile looms, rapier looms, and air-jet looms. 

Airbag fabrics are produced on rapier and projectile looms. 

Precision winding 144 Pretreatment 254 Printing 268, 270 Projectile loom 159 Protective textiles 316... 

Recommended for flat and texturised polyester filament yarns which are to be woven on projectile or air-jet looms. Suitable for low twist yarns providing excellent protection against fil-amentation and producing warps of first class weavability. 

Although the weft insertion on these heavy duty machines may also be by rapier, for the wider looms insertion by conventional shuttle or projectile shuttle is more common. Furthermore, with weft insertion rates approximately 66% lower than the narrower, more conventional weaving machines, productivity is not particularly high. 

Gripper ioams Shuttleless looms. These looms employ a projectile with a jaw that grips the end of the filling yarn during the insertion of the pick. 

Forming fabrics are manufactured on weaving looms with a width of up to 15 m, where CD yarns (wefts) and MD yarns (warps) are interlaced with each other. The weft insertion is typically made by using shuttles, projectiles or band rapier systems. 

Automatic Filling Transfer Shuttleless Looms Rapier Looms Projectile (Gripper) Looms Fluid Jet Looms... 

Woven fabrics for airbags are produced mostly in plain weave with projectile and rapier looms. The most important parameters for weaving are thread density and air permeability of the fabric. 

---