The working principle of LJ-H Type High Speed ​​Rapier

Opening\Weft Insertion\Beating-up\Warp Let-off\Reeling
Opening
LJ-H Type High Speed Rapier
 In the shedding process, the warp yarns form a shed by the lifting motion of the heald frame, and the nature of the heald frame movement has a great influence on the breakage of the warp yarn. After the shape and size of the shed are determined, the law of heald frame movement becomes the fundamental factor that affects the effect of shedding movement, which is of great significance for ensuring the smooth progress of weaving and improving the productivity of the loom and the quality of the fabric.
Weft insertion
Weft insertion are equipped with rapiers and corresponding sword-passing mechanisms on both sides of the loom. These two rapiers are called weft-feeding sword and weft-receiving sword respectively. When weft insertion, the weft yarn is sent to the center of the shed by the weft-feeding sword, and then delivered to the weft-receiving sword on the opposite side that has also moved to the center of the shed. The two swords are retracted separately, and the weft yarn is pulled through the shed by the weft-receiving sword
Let off
During the weaving process, the warp yarns and weft yarns are woven into a fabric and are continuously taken away. In order to ensure the continuous progress of the weaving process, the warp let-off mechanism successively sends out the appropriate length of warp to supplement, so that the warp tension on the loom is strictly controlled within a certain range.
The process requirements for warp let-off are: to ensure that the warp yarns are sent out uniformly from the weaving shaft to meet the requirements of fabric formation; to provide the warp yarns with a machine tension that meets the process requirements and maintain a stable tension during the weaving process.
Take-up
New-type looms usually adopt an active continuous winding mechanism. During the weaving process, the fabric winding is continuously performed. Part of the positive continuous winding mechanism adjusts the weft density of the processed fabric by changing the number of gear teeth, which has the disadvantage of insufficient weft density control. With the development of loom technology, a mechanism for adjusting the weft density of the processed fabric with a continuously variable transmission has been produced, which improves the accuracy of the weft density control. The emergence of the electronic winding mechanism not only simplifies the mechanical structure and realizes the precise control of the weft density, but also can change the winding amount at any time during the weaving process to adjust the weft density of the fabric.
The definition of opening: on the loom, according to the requirements of the fabric structure, the warp yarns are separated up and down to form the movement of the shed, referred to as the opening. The structure that completes the opening action is called the opening mechanism. LJ-H Type High Speed Rapier
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