The difference between jet looms and rapier looms.
1. Different from twisted edge lines:
(1) Generally speaking, polyester cotton thread is a rapier, while filament is a jet loom.
(2) Jet double fabric, one side is threaded and the other side is filament.
(3) The double perforated fabric on both sides of the sword is made of polyester cotton yarn.
2. Differences in Looms
Rapier loom: using rigid or flexible rapier heads and rapier straps to guide weft yarn. The rapier loom is not only suitable for weaving plain weave fabrics, but also has the characteristics of easy color changing, suitable for multi-color weft fabrics, suitable for producing colored fabrics, double-layer velvet fabrics, loop fabrics, and decorative fabrics.
Jet loom: Using compressed air jet to pull the weft yarn through the shed. The characteristics of jet looms are fast speed and high labor productivity. Suitable for plain weave fabrics, textured fabrics, fine, high-density fabrics, and large-scale fabrics.
3. Advantages and disadvantages of grey fabric
(1) Generally speaking, there are many varieties of fine count yarn produced by jet printing of grey fabric, with many stops, mainly focusing on lightweight fabrics; Generally speaking, rapier machines have various types of coarse and low resistance yarns, mainly heavy fabrics
(2) In terms of equipment, jet and rapier are just weft insertion.
(3) The same organization weaves raw materials with the same cost, resulting in lower weaving costs. For example, in Twill, the air injection speed can reach over 800 revolutions per minute, while the arrow rod can only rotate about 180-200 revolutions per minute.
4. Commonalities and Differences
Commonality: They all have rough edges and can be of the same specifications
Heterogeneity: Under the premise of the same number and specifications of yarns
① This jet plane is both heavy and light.
② The flatness of jet plain fabric is better than that of rapier production.
③ The fabric shrinkage of jet looms is relatively high.
④ The quality of jet yarn is better than that of rapier yarn.
The nozzle function of an air jet loom is as follows:
1. When setting the spraying angle of the main nozzle, the definition of the left warped opening should be considered. If set too early, there will be warp drape, causing the weft to stop increasing. If it is too late, defects such as weft shrinkage may appear at the edges of the fabric. It is necessary to increase the injection pressure. If the opening of the left warp is good, the spraying angle can be advanced appropriately to save gas. In general, the angle of the injection end is 180 ° ± 15 °.
2. When the pressure of the main nozzle is too high, the arrival time of the weft yarn is advanced, and the weft yarn head end will be blown off, resulting in weft yarn shrinkage, loose weft, and short weft at the edge of the fabric. The left edge of the fabric is not well trimmed, and the scissors cannot cut it neatly.
3. The spraying time of a group of secondary nozzles is generally the same as the main nozzle, or about 10 ° in advance, with an end angle of about the angle from which the spraying starts+80 °. According to different types of weft yarns, in order to obtain sufficient weft insertion speed, the spraying angle of one set of auxiliary nozzles can be appropriately extended. The spraying angles of other auxiliary nozzles are generally delayed by 15 °~20 ° in sequence, and the end angle is the angle at which the spraying starts+80. In actual production, advancing the spraying angle can reduce the consumption of air and gas.
