1. Main types
(1) Classification according to structure and shape: it can be divided into air-jet reed and double-layer air-jet reed.
The air-jet reed is bonded with special-shaped reed blades, aluminum reed beams, and resin glue. It is used for various fiber fabrics such as cotton, chemical fiber, and glass fiber. The double-layer reed uses special-shaped reed blades + bent blades arranged at intervals. Aluminum reed beam, resin glue bonding, used for wool fabrics and warp fabrics with twisting effect.
(2) Classification according to reed tooth shape: curved back type, straight back type, long straight back type, special type.
(3) Classification according to the shape of the tapered mouth: ordinary type, tapered mouth type, double tapered mouth type.
(4) According to the classification of air-jet looms: they can be divided into Tsudakoma type, Toyota type, Picanol type, Dornier type and Shumate type.
(5) Classification according to reed type: ordinary type, upper double spring type, lower double spring type.
(6) Classified by nozzle: single spray type, double spray type (double spray or above).
(7) Classification according to fabric edge: smooth edge type, raw edge type.
2. Main structure
The main structure of the air-jet reed is shown in Figure 8-1, which consists of reed blades, aluminum reed beams, semicircles, springs, reed edges, and resin glue.
3. Basic dimensions and permissions of air jet reeds Tolerance
The basic dimensional tolerances are shown in Table 8-1.
4. Air jet reed type and Main dimensions (classified by air-jet loom)
The correspondence between the model and type of the air-jet loom and the main dimensions of the air-jet reed is shown in Table 8-2.
5. Terminology and technical requirements
1. Terminology
Reed number: reed tooth interval Number of reed teeth per 10cm. The reed size is expressed by the number of reed teeth per 10cm length, but it is still customary to use the number of reed teeth within a length of 2 inches (50.8mm) and 1 inch (25.4mm).
Reed width (L1): leftThe distance between the outer edges of the right reed.
Reed effective width (L2): the distance between the outer sides of the reed teeth at both ends.
Total reed height (H): the distance between the outer sides of the upper and lower reed beams.
Air flow groove height (h 3): the distance between the bottom of the lower reed beam and the upper plane of the air flow groove.
Air flow groove depth (t): the distance between the front plane of the lower reed beam and the bottom surface of the air flow groove.
Air flow slot angle (α): the angle between the upper plane and the lower plane of the air flow slot.
Airflow slot width (K): The width of the bottom surface of the airflow slot.
Reed tooth pitch: the sum of the reed tooth thickness and the reed tooth gap.
Space ratio: the gap between the two reed teeth as a percentage of the reed tooth pitch.
2. Technical requirements
The basic structure, size and limit deviation of the reed should comply with the provisions of Table 7-1.
The reed teeth are made of stainless steel.
The surface roughness of the reed teeth is Ra0.1~0.2.
The surface hardness of the reed tooth is: tooth thickness (S)>0.30mm, its surface hardness is ≥400HV; tooth thickness (S)≤0.30mm, its surface hardness is ≥480HV.
The reed beam is made of high-strength aluminum alloy profiles, with a tensile strength of ≥177MPa and a surface hardness of ≥60HV0.2.
The vertical requirement between the side of the reed teeth and the bottom plane of the lower reed beam is 90°±1°.
The vertical requirement between the side of the reed teeth and the front plane of the lower reed beam is 90°±1.5°.
The reed teeth, reed beams, semicircles and reed edges are firmly bonded, the glue is fully injected, and the surface is clean and free of glue beads.
The reed teeth are arranged neatly and evenly, with no soft teeth or curved teeth. The reed surface is straight and smooth, without defects such as edges, burrs, and rust spots.
The relative error of the total number of reed teeth is <0.1%.
The flatness of the reed bottom plane is 1mm within any length of 1m.
The number of reed teeth in any 10cm length within the effective width of the special-shaped reed should comply with the steel reed number.
The performance of the reed air flow groove should be low air consumption, smooth air flow changes, and ensure smooth weft insertion of the air-jet loom.
The air flow parameter (air pressure value) of the air-jet reed is an important technical indicator, and there are two types of air-jet loom manufacturer settings and textile enterprise settings. It is generally designed based on the different types of air-jet reed structures, fabric fibers and reed numbers. Currently, there are four commonly used air-jet reed air pressure value units in the world, see Table 8-3.
The air pressure value curve is different depending on the type of loom., usually there are two types: straight lines and curves.
At present, there are various models of air flow detectors in domestic manufacturers, and the conditions of use and input air pressure are different, so the detected values have certain differences. Changzhou Reed Co., Ltd. has introduced advanced airflow detectors and related technical information, data, waveform lines, air pressure values, etc. from Japan and Europe to be in line with international standards, fully meeting the airflow requirements of various fabric types and loom models.
6. Jet reed and special-shaped reed Film specifications
(1) The special-shaped reed blade is shown in Figure 8-2: it is made of SUS301 stainless steel, with a hardness value of HV500~550. The length of the reed blade is related to the reed height, the width of the reed blade is 4mm, and the thickness of the reed blade is related to the reed number. The shape, angle, thickness, smoothness, finish, airflow groove shape and reed material will have a significant impact on the yarn channel, fabric quality and production efficiency.
(2) Fiberglass reed Sheet: Made of SUS420j2 stainless steel material, hardness value HV500~550, martensitic structure to increase its wear resistance.
(3) Double-layer reed bend: Made of SUS301 stainless steel, mainly used for double-layer air jet reed.
7. Reed size and reed blade thickness
The preferred space ratio is 63% to 68% (short fiber). See Table 8-4 for reference only. You can choose according to the actual situation. .
The preferred space ratio is 55% to 60% (chemical fiber), see Table 8-5.
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