In the past 20 years, in addition to increasing the speed of the air-jet loom, improving the ability of automatic monitoring, and improving the adaptability of varieties, many improvements have been made in improving operating efficiency and saving raw materials. Selvedge etc.
1. The weaving beam of the air-jet loom is supplied by the sizing machine. The warp beams exhibited at the Paris Exhibition in 1999 have been enlarged, and the diameter of the general diameter has reached more than 1100 mm, and the diameter of some warp beams has been increased to 1600 mm. .
The large warp beam can prolong the weaving time, reduce the number of times of beam replacement and downtime for beam replacement. When the diameter of the warp beam increases from 40 inches (1016 mm) to 50 inches (1270 mm), the capacity of the yarn increases by 1.6 times, and the diameter of the warp beam increases When reaching 63 inches (1600 mm), the capacity of the beam is increased by 2.4 times compared with the capacity of the beam with a diameter of 40 inches. The number of shaft replacements is significantly reduced, the downtime of the loom is reduced, and the operating efficiency of the loom is improved. At present, new air-jet looms use more and more weaving shafts with a diameter of 63 inches.
2. Quick shaft change technology: Practice has proved that changing the shaft has a great impact on the efficiency of the air-jet loom. Generally, it takes more than one hour to change the shaft, and each shaft can weave for 2-3 days at most. Therefore, it takes time to change the warp shaft and change the variety. Measures must be taken to reduce it. In addition to completing the reed task in the reed room, the staff can also clean the reed. According to statistics, 2-5% of the warp yarn machines will stop in the warp direction if the reed is not clean, accounting for the entire warp direction. 80% of the head. In order to do a good job of threading the heald reed before going on the machine, the air-jet loom must have 25-35% warp beam reserve.
Air-jet loom QSC (Quick Style Change) can change the style with only a small change. The air-jet loom shaft change preparation and loom preparation work are all adjusted in advance, so that the shaft change time is only 30 minutes. Of course, this shaft-changing action is completed by an automatic mechanism and an auxiliary mechanism for loom operation, and also manually. It not only improves the efficiency of the loom, but also can change the variety flexibly and timely according to the needs of users. The air-jet looms of the series such as Tsudakoma, Picano, and Somet are equipped with automatic shaft-changing and variety-changing mechanisms. TSC Tsudakoma’s variety rapid change device can make the variety complete by one person in a short time according to the requirements.
The use of an automatic warp-tying machine on a shuttleless loom is only suitable for changing shafts of one type, and is not suitable for changing types. The working quality of the automatic warp-tying machine is not very satisfactory, and wrong knots occur, and manual reeding and heald finishing must be carried out after 2-3 times of automatic warp-tying, so the technology of automatic quick shaft change is very important.
3. Improvement of selvedge:
The cloth woven by the air-jet loom has rough edges, the waste of yarn is large, and the cut edge yarns cannot be reused, and some problems will arise in post-processing. Most of the new air-jet looms have been improved on the selvage, including leno selvage, tuck selvage, melting selvage and bonded selvage, and the hemming where the weft yarn head and tail are pressed into the selvedge organization by the jet airflow. The appearance is very neat. For example, the selvage of the Mythos air-jet loom is a device that folds the end of the yarn into the selvage by compressed air. This system is suitable for different counts and types of weft yarns, and some moving parts are omitted. , not limited by the speed of the vehicle, low energy consumption, basically no maintenance, reducing the waste of edge yarn. Other air-jet looms such as Tsudakoma and Bigano also have this new hemming device.
4. Improvement of transmission system:
Some air-jet looms adopt frequency conversion speed regulating motors to directly drive the main shaft, simplify the transmission mechanism, cancel the transmission belt, clutch and brake devices, etc., improve the transmission efficiency and reduce energy consumption. Like the Bicano omniplus air jet loom, a dedicated main motor sumo is used to directly drive the main shaft of the loom.
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Post time: Apr-25-2023
