Current situation and development trends at home and abroad
The development and production of shuttleless looms in my country has experienced nearly two decades of progress and has entered a new period of progress. Various loom manufacturing enterprises have developed and produced shuttleless looms through a combination of technology introduction, digestion and independent development. Rapier, air-jet, water-jet and projectile looms, and have formed a certain batch production capacity. There are more than 50 manufacturing enterprises in more than a dozen provinces and cities across the country, with an annual output of nearly 50,000 high, medium and low-end shuttleless looms of different types. These looms are suitable for cotton, wool, linen, silk and chemical fiber fabrics. The varieties are relatively complete, and the technical levels are also divided into high, medium and low grades, which can basically adapt to different needs of the market. Among shuttleless looms, rapier looms are very popular among users because of their strong adaptability and easy replacement of varieties. They account for a considerable proportion of domestic shuttleless looms. At present, the models mass-produced and sold in the domestic market are mainly converted from the SM93 model of the Italian Shumate Company, the GTM model of the Belgian Picano Company, the FAST model of the Italian Smit Company, and the Hengde model of Taiwan, China. Come. Among them, the main manufacturers of machine models include Liaocheng Changrun Fabric Machinery Co., Ltd. (formerly Liaocheng Fabric Machinery Factory, the main machine models are GA731-Ⅱ, CR-1000), Jingwei Textile Machinery Company (model JWG1724), and Titan Textile Machinery Company. (Model TT-96), Xihang Textile Machinery Company (Model GA731B), Wuxi Longli Company (Model LL-680). The second type of machine mainly includes: Picano (Suzhou) Textile Machinery Company (model: GTM-AS), Gaochun Textile Machinery Factory (model: SGA726), Su Textile Machinery Factory (model: GA737A), Wanli Textile Machinery Company (model: Model: WL450), Guangdong Fengkai Company (model: KT566), etc. Shanghai China Textile Machinery (Xinlong) rapier loom is transformed from the FAST model of the Italian Smit company. Except for slightly different weft insertion components, the three models are all wall panel frames and conjugate cams. Beating up, separate reed base, 8-color weft selection, mechanical let-off and take-up (can also be equipped with electronic type), operating speed between 300~400r/min. The electronic control system uses a single-chip microcomputer or programmable controller. The fourth type of machine mainly includes: Zhongyi Machinery Company (model SF-888), Wuxi Longli Company (model LL-380), Jinan Lusida Company (model JW780), etc., with operating speeds between 200 and 280r /min. In addition, there are GA74 series popular rapier looms. The main manufacturers include Shanghai China Textile Machinery, Suzhou Sanhe Company, etc., with operating speeds between 160 and 200r/min. In recent years, domestic loom manufacturers have greatly improved their self-development capabilities through continuous efforts. They have continuously learned from the advantages of foreign advanced looms and gradually transformed and optimized their own rapier loom mechanisms to make their performance more stable and reliable. But there is still a big gap compared with foreign advanced level looms. In terms of the speed of rapier looms, the operating speed of domestic models is generally below 400r/min, while the speed of foreign advanced looms has reached about 600r/min. At the same time, foreign rapier looms generally implement electronic control technology, electronic dobby shedding, electronic let-off, electronic take-up, electronic weft selection, electronic jacquard, electronic selvage, electronic edge shear, electronic weft tensioner, etc., and their electronic control systems 32-bit microcomputers are generally used to achieve two-way communication, and some machines use CANBUS field bus. Also known as electronic rapier loom. For example, the German Dornier Company’s P-type rigid rapier uses 33 to 45 motors on a loom to realize the control, monitoring, human-machine dialogue of various actions through PLC, etc., to achieve two-way communication, and through the Internet, on-site bus (CAN), etc. for group control, realizing networked control and diagnosis with the headquarters, and providing users with timely, efficient and accurate service and guidance. There are also other advanced foreign looms with this function. In terms of product adaptability, foreign rapier looms have unparalleled advantages. At the 9th International Exhibition held in Beijing in 2004, the German Dornier company’s P-type rapier loom adopted a positive weft yarn handover system and was equipped with an electronic weft yarn tensioner, which not only greatly reduced the peak tension at the moment of weft yarn handover. It is small, with reduced end breaks, and can weave fancy yarns from 7D silk to 3333tex. The same sword head can be used to achieve double weft and multiple wefts, giving the cloth a very patterned effect, which satisfies various fabric varieties and high-end fabrics. Weaving needs. This kind of loom is mainly used in China to weave some special fabrics, such as fine cashmere, industrial airbags, body armor fabrics, etc. However, domestic rapier looms have weft shrinkage and weaving defects when weaving this type of fabric or chemical fiber filament strongly twisted fabrics, and weaving defects such as open and stop stalls when weaving high count, high density and thin staple fiber fabrics. At the same time, when weaving these varieties The hourly efficiency is 10% to 20% lower than that of imported looms. The rapier drive of the Sulzer G6300F terry rapier loom adopts a space crank rocker mechanism; a supporting piece is used on the reed seat to replace the sword guide plate; the rapier head belt has a long service life and forms terry loops through reeding. The pile height is 0~12mm, and 240 kinds of pile heights can be set on a towel and can be combined in any way. When changing the terry fabric, there is no need to replace the looping cam. The program can freely set three-weft, four-weft, five-weft, six-weft and seven-weft terry to arbitrarily switch between terry piles with different heights in the warp and weft directions. It can produce unique wavy and embossed patterns, but currently domestic looms cannot meet the requirements for weaving high-end towel fabrics. Picanol Gamma rapier looms have been widely used in my country in recent years and have a high degree of electromechanical integration. Any weft selection finger of its weft selector is directly driven by a stepper motor, with up to 8 colors, and the operator can Input fabric structure through microcomputer. The main motor adopts Sumo super motorThe loom is directly driven, and the transmission belt, clutch and brake disc are no longer needed, and the transmission mechanism is simplified. During operation, the speed is adjusted according to the type of yarn being spun, and the machine starts and brakes quickly to completely solve the spinning marks and improve the fabric quality. The machine is also equipped with a QSC quick type change device, which saves machine time and greatly reduces labor. The main drive of the Z5X rapier loom of the Italian Benda Company adopts a D1D motor to directly drive the loom and eliminates the clutch. During the weaving process, the main machine speed can be programmed to control according to the performance of the weft yarn, reducing end breaks and improving productivity. The back beam tension sensor adopts the “Loodcell” system, which eliminates the old spacing sensor, making tension adjustment more convenient and reliable, and increasing the service life. “The sensor tension analysis system collects data more accurately, and the reduced diameter of the back beam reduces the contact surface with the warp yarns, making the warp yarn surface less likely to wear. The frame adopts steel plate wall panels, which decrease layer by layer from bottom to top, and the footings are of the “tank truck” type, which reduces vibration during machine operation and improves the stability of the entire machine during operation. The weft insertion mechanism adopts equal-pitch screws, and the positive rapier can be used for weft yarn transfer. The rapier rapier belt is miniaturized, the warp tension changes little, and the weaving range is wide. In addition, there are ALPHA and Tianma super-excellent looms from the Italian Promatec company, which are also highly mechanical and electrical. These machines are widely used among Chinese users and are relatively familiar to them. In short, the above foreign models basically represent the high level of rapier looms in the world today.
AAAEGRTHRTH
Extendedreading:https://www.alltextile.cn/product/product-76-620.html
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
ExtendedReading:
Extendedreading:
Extendedread
