There are many classifications of looms. According to the weft insertion method of weaving, they can be divided into shuttle looms andShuttle-free machine.
The latitude of a shuttle loom is a loom that uses a traditional wood shuttle or plastic shuttle loom to induce latitude. The spindle is large in size and heavy in weight, so the spindle projects back and forth repeatedly, the machine vibrates, the noise is high, the energy consumption is high, the speed is slow, and the efficiency is low.
    Shuttle-free machineThe weft is also inserted in a variety of ways. Rapier, jet, water jet, spindle, multi-equal.
air-jet loom
The weft yarn is drawn with a jet of air through a shuttle loom of spindles.
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historical development
In 1949, Czechoslovakia first made an air-jet loom. Because there was no measure to control the diffusion of air flow, the woven fabric was only 45cm wide.
In 1956, a combined segment was developed to limit the diffusion of air flow, and a breakthrough was made in jet technology.
In 1963, the Netherlands developed auxiliary nozzle weft insertion technology, which greatly increased the width and loom rotation speed.
In the 1970 s, new 3354 buckles appeared to limit the diffusion of air flow. For example, the variety and quality of fabrics woven by air-jet looms have made new progress.
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Weft insertion principle
The purpose of air jet weft insertion is to use air as the weft yarn medium, and use the compressed air jet to pull the friction traction generated by the weft yarn, and the air jet weft insertion generated by the weft yarn passing through the ball.
Air jet weft insertion characteristics
Air jet weft insertion is characterized by high speed, high horsepower, rigging, and high requirements for yarns and semi-finished products.
Air-jet weft insertion is a negative weft insertion method. When the weft is flying over the shuttle, the tension is small and there is no control, so the linear density is large, or the filament weft lacks sufficient traction. On the other hand, the open state of the inclined surface has a great influence on the weft insertion quality, and it is easy to produce fabric defects such as weft shrinkage and weft reentry.
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Shuttle-free machine features
Among several shuttle looms, air-jet loom is the highest speed type, with reasonable latitude, high latitude, convenient operation, safety, large variety adaptability, low consumption of mechanical materials, high efficiency, high speed and low noise. It has become one of the most potential new shuttleless looms. The air-jet loom adopts the air-flow weft yarn method, and the biggest disadvantage is the high energy consumption.
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    Shuttle-free machineScope of application and fabric variety
The early air-jet looms had a small adaptation range, mainly producing white gray cloth, with small fabric width, slow speed, large fabric limit, and low fabric quality. However, since the early 1980 s, the development of air-jet loom transplanter and relay weft insertion technology, as well as the application of electronic computers, sensors and variable speed control technology, have greatly improved the speed of the air-jet loom and the automatic monitoring level of the loom. Especially in the past 10 years, the rapid development of air-jet loom has many advantages such as high quality, high speed, high yield and high yield level, and the adaptation range of varieties has been greatly improved.