The important thing when using air-jet reeds is to select the appropriate structure and specifications according to different types of looms and fabrics. The selection should be based on the air-jet reed drawings and related technical requirements provided by the original loom factory.
1. Selection of steel reed
1. Select the reed size according to the variety, specification and process requirements of the fabric
(1) Selection of metric reed size: The metric reed size can be calculated according to the following formula, generally taking an integer, the reed size range is 50~330 reed/10cm, and the chemical fiber reed size is 70~400 reed/10cm.
2. Reed blade gaps of various reed sizes
A suitable reed gap is very necessary for the efficiency of the air-jet loom and the quality of the fabric. The recommended reed gap can only be used as a reference. A suitable reed gap can only be achieved through practical experience and a comprehensive understanding of the types of yarns and fabrics. Table 8-8 and Table 8-9 are the reference tables for the reed blade gaps of various reed sizes for cotton fabrics and chemical fiber fabrics.
3. Warp density and reed number
When trying to weave the fabric, you can The warp density reference table preselects the reed size. After trial weaving, appropriate adjustments will be made to determine the officially used reed size. Table 8-10 is applicable to the reed size with 2, 3, and 4 reeds inserted into each reed gap of the ground warp tissue.
4. The warp passes through the reed width
The reed width of the warp yarn can be calculated according to the following formula:
WarpThe yarn threading reed width should generally be less than or equal to the warp threading reed width of the loom. The relationship between the warp threading reed width and the loom’s nominal reed width is shown in Table 8-22 (taking the Tsudakoma loom as an example).
5. How to reed
Take Tsudakoma Take the loom as an example:
(1) Start reeding from the second tooth gap on the left. The first tooth gap on the left is the edge of the cloth and can be opened.
(2) The planetary selvedge yarn has two situations: the same reed tooth gap as the warp end yarn (the second reed tooth gap on the left) or the first reed tooth gap interspersed on the outside.
(3) The twisted edge yarn is usually inserted into the first reed tooth gap.
(4) The yarn for yarn end treatment is usually threaded through 1 to 2 yarns at a position 5mm away from the weft detecting head.
(5) When threading the reed, it has nothing to do with the reed width. The yarn should be threaded from the left side of the reed, with the remaining reed teeth on the right side.
6. Selection of tapered mouth (flare mouth)
The tapered mouth special-shaped reed is suitable for multi-nozzle looms and is widely used in jacquard shedding looms. The tapered mouth is used for air jets. There are more entrances on the left side of the reed. Some looms are also used on the left and right sides of the air-jet reed.
(1) Selection of tapered mouth length: Currently, the commonly used tapered mouth length is between 20 and 225mm, which is used in Tsudakoma, Toyota, Picano, Dornier, Shumate and other looms. .
Shumate looms are selected according to Table 8-12.
(2) Selection of tapered mouth shapes: At present, the main shapes of tapered mouths are 5 types, namely tooth cone, mouth cone, double cone, oblique cone, and three-way cone. Tooth cone and double cone are widely used. It can be selected according to the model of the loom and the condition of the fabric. This requirement can be made to the manufacturer when ordering the air-jet reed.
7. Selection of reinforced teeth
Some fabrics and fibers require the reed teeth to have high wear resistance. Generally, 1.5 to 5cm of reinforced reed teeth can be added to the left entrance. If the position of the fabric width on the right side can be determined, reinforced reed teeth can also be installed. This requirement can be made to the manufacturer when ordering the air reed. Generally, chrome-plated reinforcement sheets or DLC high wear-resistant reinforcement sheets can be used.
8. Install double springs
According to the special requirements of the fabric and loom, double springs can be added. This requirement can be made to the manufacturer when customizing the air reed.
Most air-jet loom manufacturers require double springs to be added when the reed thickness is ≤0.17mm.
Bigale and Dornier looms require reed thickness ≤When 0.2mm, add double spring.
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