SGA type air jet loom
SGA211 air-jet loom is a new type of air-jet loom developed and designed by Shijiazhuang Fabric Machinery Co., Ltd. based on national conditions. It can weave short fiber and filament fabrics of various weft densities and weights. Suitable weaving varieties SGA211 air-jet loom can weave cotton, wool, linen, silk, blended chemical fiber fabrics, chemical fibers and other fabrics. Mechanical structure The main body consists of two box-type wall panels and four beam supports. Its two box-type wall panels incorporate the transmissions on both sides, making the entire machine look simple and clear. Among the four cross braces between the two wall panels, the breast beam, rear cross beam and front bottom beam are all 120mm×120mm square steel tubes, while the rear bottom beam is a channel steel brace, which can accommodate various wiring of electrical appliances. The chest beam and auxiliary air bag are integrated into one, and the solenoid valve is directly installed on the chest beam, which shortens the air path and reduces air consumption. Main transmission mechanism: The main motor is transmitted to the crankshaft through the pulley. The curved four-bar linkage mechanism composed of crankshaft, handle, rocker, etc. transmits the leisure to the beating mechanism. At the same time, the crankshaft drives the winch through the gear transmission of the boxes on both sides. Side, Song Jing mechanism. The right crankshaft drives the cam opening mechanism through the synchronous pulley and bevel gear. The left crankshaft drives the coiling mechanism through another pair of synchronous wheels. Its main motor is a 3.0kW super-torque motor, which allows the loom to generate 12 times the normal operating torque when it is started to increase the shuttle’s beating power and prevent the occurrence of parking stalls. The weft insertion mechanism consists of a main nozzle, an auxiliary main nozzle, an auxiliary nozzle, a stretching nozzle and 13 high-sensitivity solenoid valves. After the main nozzle and auxiliary main nozzle transport the weft thread to the special-shaped reed groove and position it correctly, the auxiliary nozzle sprays regularly in groups one by one in a relay manner to transport the weft thread through the shed. At this time, the stretching nozzle uses air to actively hold the weft thread. Straighten it (to prevent the relaxation of the weft yarn) and improve the quality of weft insertion. This mechanism is also equipped with two fully electric weft detectors to detect common weft breaks and blown weft yarns, ensuring foolproof weft insertion. When weaving different fabrics with different weft yarns, they should be equipped with different types of main and auxiliary nozzles and different airflow parameters (referring to airflow pressure, injection timing of the main and auxiliary nozzles, etc.). Beating-up mechanism The beating-up mechanism is a four-link transmission. When the crankshaft rotates, the reed is driven by the hand and the rocker to swing back and forth around the center of the rocker shaft. When the steel reed swings forward, the weft yarn is pushed to the cloth fell, completing the beating action. The smaller the ratio between the crank radius and the hand length, the more even and gentle the changes in speed and acceleration will be, thus having good high-speed adaptability and achieving stable beat-up. Shedding mechanism: Negative shedding cam shedding mechanism, can hold up to 8 pages of heald frames. When the cam turns from a small radius to a large radius, the wire rope connected to the heald frame is pulled to the right through the rotor and the opening arm, forcing the heald frame to move downward to form a shed. At the same time, the spring in the heald return device is stretched to store energy. When the cam continues to rotate and turns from a large radius to a small radius, the entire return heddle system returns to its original position due to the energy stored in the return heddle spring, completing the shed closing action. Healt springs must have excellent properties such as good frequency response and fatigue resistance. The initial position of the movable back beam of the electronic let-off mechanism is determined by the set warp tension. Once the loom is running, under the action of the warp dynamic tension, the original equilibrium state is destroyed, and the movable back beam, tension rod, spring, etc. Make corresponding actions, assuming that the dynamic tension of the warp increases, the back beam and the tension rod will swing counterclockwise around its fulcrum, causing the spring to grow. At this time, the tension sensor sends out a warp let-off signal command, which is processed by the computer to drive the AC servo motor to rotate, driving the The warp let-off wheel train drives the weaving beam to rotate clockwise to send out the warp yarns. This mechanism adjusts the warp tension sensitively and accurately, and has the functions of storing instantaneous tension and rewinding. This is very beneficial for loosening the warp yarns when the machine is stopped, and adjusting the warp yarn tension before starting the loom when starting the machine to prevent driving on dense roads. Coiling mechanism: This mechanism is a mechanical continuous coiling mechanism. The small coiling reduction gearbox obtains the rotational speed from the main shaft. After deceleration, it drives the gear mounted on the shaft end of the friction roller body through the gear train, thereby causing the friction roller to rotate, and then through its gear train. The sprocket transmission on the machine is transmitted to the cloth rolling roller to wind up the fabric. The gears are a pair of conversion gears, one of which is a standard gear, available in three types: 22T, 25T, and 50T. Different conversion gears can be used to weave fabrics with different weft densities. The selvage device adopts planetary gear hemming device. The automatic stop device for warp breakage adopts 6 rows of electrical contact rods. Model description:
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Extendedreading:https://www.yingjietex.com/product/400D-Polyester-Double-Catenulate-Dobby-OXFORD-Fabric.html
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