Fill Insertion

In the rapier systems, the fill yam is carried across the warp by a single or two mechanical arms. The rapiers must be removed from the shed prior to beat-up. In the single rapier system the end of the arm contains 

Fluid fill insertion systems do not use a device to carry the fill yarn across the loom. They operate hy impinging sonic velocity water or air jets onto the end of the yarn which accelerates and carries the yarn across the loom. Since liquid water is more cohesive than air and the energy conferred to the water is not as readily dissipated as the energy conferred to air, the water jet is eapable of eonveying the fill yarn greater distances than an air jet. The major disadvantage of water jet fill insertion methods is related to the hydrophilic character of the water 

When pile type fabrics are produced on a loom an additional warp is necessary. The tension on one of the warps is released before beat-up 

Very stable fabric structures can be produced by bringing two warp yams into the loom at 60° angles to one another and inserting fill in the normal fashion to form a triaxial fabric. 

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There are multiple stations in a narrow fabric shuttle loom. That means the same structure in multiple stations or different structures can be woven on the same loom depending on the capacity of the Jacquard hooks and the total picks per inch in the structure. It is difficult to produce 3D and complex shapes using carbon and brittle fibers on a needle loom. A narrow fabric needle loom (Hans Walter Kipp, 1989) can also be used to produce some 3D preforms. A typical narrow fabric needle loom is shown in Figure 9.58. The selvedge on the side of filling insertion needle is a true... 

A few companies have developed 3D looms (Mohamed et al., 1992/1995 3Tex Khokar, 2002 Uchida et al., 1999 Wilson et al., 1999). Mohamed et al. (1992/ 1995) and 3Tex have developed 3D looms. Figure 9.61 shows the filling insertion from both sides. The warp fibers are fed either from bobbins posititmed oti a creel or from beams. They are separated into layers to allow for fill insertion. These warp layers are fixed open to form sheds without the shedding mechanism. 

Figure 9.61 Filling insertion by needles from both sides (Mohamed et al., 1992/1995). 

The 100m functions in the following manner. The warp beam is connected to a let-off mechanism that meters the warp yarns off the beam as fill insertion proceeds. Each yarn in the warp passes through metal warp stop mechanisms that can detect broken warp yarns, through the eyes of heddles that are contained in the various harnesses used to lift the warp yarns, through the reed used to beat-up the filling yarn, and finally onto... 

The fill yarn is inserted at right angles to and through the shed by use of a shuttle or an alternative insertion mechanism by a process called picking. Below the insertion mechanism is the race board that helps provide support for the shed and the fill insertion area. The reed is placed between the open shed and the fill insertion area of the shed. After the... 

Other Terms Related to Single Fabrics Weaving Shedding Filling Insertion Beat-Up... 

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