The air-jet loom is mainly composed of frame, transmission and braking system, shedding mechanism, weft insertion mechanism, weft beating mechanism, warp let-off mechanism, coiling mechanism, hemming mechanism, scissors mechanism, edge yarn catching device, centralized oil supply and automatic control system etc.
Structural features of the air jet loom:
1. Way of weft insertion
Under the action of the main and auxiliary nozzles and special-shaped reed, the high-speed airflow generated by releasing the compressed air is used to pull the weft yarn through the fabric fell to complete the weft insertion.
2. Opening method
There are crank openings, cam openings, dobby openings and jacquard openings, which can be selected according to the weave. The general conventional configuration is a cam riser.
3. Beating up method
There are three kinds of four-link beating-up, six-link beating-up and conjugate cam beating-up.
4. Let-off mechanism
Mainly adopt electronic semi-positive semi-negative continuous let-off and mechanical semi-positive semi-negative continuous let-off.
5. Coiling mechanism
There are mechanical continuous coiling and electric coiling. Domestic air-jet looms are generally equipped with mechanical continuous coiling.
6. Rolled cloth
Generally, the cloth is rolled inside the machine, and the cloth rolled outside the machine is optional.
7. Rack
Japanese models use box-type wall panel racks, and European models mostly use plate-type wall panel racks. Both types of frames exist in domestic air-jet looms.
8. Transmission and braking
The reluctance motor is directly driven and braked, and the speed can be adjusted steplessly; the overstart motor is driven, and the electromagnetic brake is used for braking; the ordinary motor, flywheel and clutch are driven, and the electromagnetic brake is used for braking.
9. Lubrication
The main transmission part is lubricated by oil bath, and other parts are lubricated by oil cup or centralized oil supply.
10. Yarn supply
There is a floor-standing yarn supply frame outside the machine, which can be set with 2 bobbins, 4 bobbins, 6 bobbins and 8 bobbins.
11. Length measurement and weft storage
Weft storage by electric drum, the diameter of the drum and the length of the stop pin are fixed.
12. Hemming mechanism
There are planetary hemming, leno hemming, electronic hemming, tuck-in hemming and hot-melt hemming. Choose according to fabric requirements.
13. Selvedge form
There are two kinds of raw edge and smooth edge. Depends on the institution chosen.
14. Temple
Ring temples. Choose the number of rings and needle specifications according to the fabric.
15. Weft cutting
There are mechanical scissors and electronic scissors.
16. Weft detection
Photoelectric weft finder. Sub-reflective and transmissive.
17. Weft stop device
The weft feeler detects the flight state of the weft yarn, and the weft feeler control unit judges whether the flight is normal or not and issues an instruction to stop or continue running.
18. Stop device
There are electric contact rod stopping rack type stopping devices, far infrared detecting stopping devices and combing stopping devices. At present, the warp-stop rack type is mostly used, and 4, 6 or 8 columns can be used according to the warp density.
19. Display
Keyboard display (parameter setting, loom status monitoring, self-diagnosis of faults); multi-color indicator lights indicate warp stop, weft stop, waiting and other information.
20. Attachment
Auxiliary main jet, drafting jet, weft braking device, etc.
21. Control system
The microcomputer is used as the control core to control the weft insertion, weft selection, weft storage, warp let-off and loom action respectively, and the weaving process parameters (warp yarn tension, design and color, solenoid valve opening and closing time, etc.) are set on the keyboard. The corresponding actions are controlled by each control unit. There is an operation button board on the left, right or in the middle of the loom, which is convenient for the operator to operate.
Post time: Apr-10-2023
