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The angle which is formed by the raising threads with the threads remaining in low position is called shed. The shed must be as wide open as to permit the easy passage of the weft insertion element. The shed can be obtained by either moving the heald frames or by directly moving the heald frames through. The machines used to form the shed are cam machines, dobbies, and Jacquard machines.
Warp let-off system has a frequency converter, which is intended for letting off from warp beam or feeding unit. The drive is mounted either on the weaving machine or on a frame positioned behind the weaving machine. The let-off starts with a machine running signal; the speed of the let-off motor is controlled by a proximity switch mounted on the whip roller system and an internal speed memory. An alarm signal switches the weaving machine off in case of over tightened warp or any other error.
The weaving machines are composed of two side frames in cast iron or steel, which are connected each other by cross members so as to create a firm bearing structure which can limit the vibrations and offer a good stability. The bearing structure of a weaving machine is a critical component that provides support and stability to various moving parts involved in the weaving process. Weaving machines are complex pieces of equipment used in the textile industry to interlace warp and weft yarns to create fabric. The bearing structure ensures the proper alignment and functioning of these moving parts, which is essential for producing high-quality textiles.
Water Jet machines are extensively used in East Asia. They are characterized in particular by high insertion performance and low energy consumption. These machines are produced only by few companies and are used for the manufacture of light and medium weight fabrics with standard characteristics and in water-repellent fiber materials, primarily multi-filament synthetic yarns. They are characterized in particular by high insertion performance and low energy consumption.
Weaving machines used for manufacturing terry fabrics, double velvets and narrow fabrics are categorized in special weaving machines. Some of the examples of such machines are terry weaving machines, double velvet weaving machines, ribbon weaving machines etc.
The Air Jet weaving machines are the weaving machines with the highest weft insertion performance and are considered as the most productive in the manufacturing of light to medium weight fabrics, preferably made of cotton and certain man-made fibers. These machines are the ideal solution for those who want to produce bulk quantities of customized fabric styles. The weaving widths range generally from 190 to 400 cm.
The projectile weaving machine made its appearance in the market at the beginning of the 50?s and is today still used in the whole world. In this weaving machine, the weft insertion is carried out by small clamp projectiles, which number depends on the weaving width and which with their grippers take out the weft yarn from big cross-wound bobbins and insert it into the shed always in the same direction.
Rapier weaving machine delivers excellent fabric quality at the right price. Its flexibility, high level of user-friendliness and versatility make it an ideal means of production for weavers of fabrics. It is a shuttleless weaving loom in which the filling yarn is carried through the shed of warp yarns to the other side of the loom by finger-like carriers called rapiers. These machines are used for weaving textile articles such as shirting, dress material, furnishing.
The new shuttle-less machines are simply called weaving machines, this term implying looms working without a shuttle.
To obtain satisfactory weaving performance, it is essential to have not only a correct yarn preparation but also an efficient organization which permits to have warps available at the right moment, thus avoiding any dead time with style or beam change.