Brief introduction of color weavingTime of issue : 2020-06-16
The fabric made of dyed yarn can be divided into two ways: colored spinning and dyed spinning. Generally speaking, colored weaving refers to the woven fabric, but the knitting machine can also make colored knitted fabric.
1： According to the different raw materials, it can be divided into yarn dyed cotton cloth, yarn dyed polyester cotton cloth, yarn dyed long wool like fancy cloth, all wool fancy cloth, wool polyester fancy cloth, wool polyester viscose three in one fancy cloth, slub gauze, pimple gauze and so on. There are many yarn dyed fabrics with silk and hemp as raw materials.
2： According to different weaving methods, it can be divided into plain weave, yarn dyed poplin, yarn dyed plaid, Oxford cloth, youth cloth, denim, khaki, twill cloth, herringbone cloth, gabardine, gongsatin, small jacquard, large jacquard cloth, etc.
3： According to the different process characteristics of the front and rear lane, it can also be divided into: color warp white weft (Oxford, youth, denim, labor cloth, etc.), color warp weft (striped cloth, plaid cloth, bedspread cloth, plaid cloth, etc.), as well as all kinds of color woven plush cloth formed due to the drawing, fluffing, sanding and shrinking of the rear lane process.
The color fastness is better, because it is dyed first, and the color will penetrate into the yarn, while the printed and dyed cloth will generally peel off the yarn to see if there is no color in some places.
Small order quantity. No matter what yarn weaving, density, grain and color can be done in tens of meters and hundreds of meters, but it is very difficult to specially customize the dyed printed fabric without grey fabric, and the dyeing printing process will also limit small batch production.
Development trend of air jet loom at home and abroadTime of issue : 2020-06-16
Air jet loom has gradually become a leading type of shuttleless loom since it was introduced into China in 1980s. After nearly 20 years of development, it has made great progress in speed, width and variety adaptability. The domestic air-jet looms have taken shape through technology introduction, cooperative production and independent development. The specifications of the looms have been greatly developed, and they have entered a stable stage. With the widespread application of automatic weft finding, frequency conversion and speed regulation technology, electronic let off, electronic coiling and electronic dobby in the air-jet loom technology, the speed has been significantly improved, the weaving adaptability has been expanded, and the product quality has been improved It is stable and can meet the needs of domestic textile enterprises in weaving different fabrics. The main difference between foreign models lies in the speed and width of the loom. At present, the rotating speed of foreign looms is 750-1000 R / min, the rotating speed of domestic air-jet looms is 600-800 R / min, and the width is only 360 cm at present. In addition, we still have a certain gap in the aspect of human-computer intelligence, and the information of keyboard display is not as large as that of foreign similar products. However, according to the requirements of users in the domestic market, compared with the imported looms, there is not much gap in fabric adaptability, weaving process adaptability and loom maintenance and operation. The domestic air-jet looms can fully meet the needs of users for weaving high-quality fabrics.
In recent years, both at home and abroad, shuttleless loom is developing rapidly, and air-jet loom is a kind of shuttleless loom. Air-jet loom, with a series of advantages, such as high speed, high efficiency, low noise, excellent fabric style, convenient operation, automation function, mechatronics technology, etc., has continuously shown strong competitiveness and broad market prospect. According to the data, it is widely used The proportion of shuttleless looms is still very low, and most of them are imported looms. Compared with 80% of shuttleless looms in advanced countries in the world, there is a big gap. With China's accession to the WTO in order to meet the challenges of economic globalization, the pace of technological transformation of textile enterprises is further accelerated. The technical transformation of China's textile industry has formed the trend of shuttleless loom replacing shuttleless loom. In 2005, the import of air-jet loom by domestic textile enterprises accounted for about 50% of the total import of shuttleless loom. It can be seen that the textile industry has an urgent demand for air-jet looms, and the market potential of air-jet looms is huge. According to the investigation of nearly 100 large and medium-sized textile enterprises in China and many towns and private enterprises in coastal areas, the annual demand of air-jet loom accounts for about 40% - 50% of the total demand of new high-grade shuttleless loom, and the market prospect is very broad.
How to save energy on air jet loomTime of issue : 2020-06-16
Shuttleless looms mainly include projectile looms, water jet looms, air jet looms and rapier looms. Among them, the unit energy consumption of projectile loom (calculated by weaving per square meter) is low, followed by water jet loom, air jet loom and rapier loom. The energy consumption is not the main index to choose the loom, but the textile machinery factory should pay attention to energy-saving technology when launching new loom.
The reason why the energy consumption of air-jet loom is high is mainly in the energy consumption of nozzle. Many air-jet loom manufacturers have studied the nozzle hole of auxiliary nozzle for a long time. They adopt the shape of single hole, multi hole, inverted cone hole and so on. Many of them have been applied in practice. The auxiliary nozzle with various aperture shapes has their own advantages. Various innovations in nozzles (including main and auxiliary nozzles) and gas pipes can not only save energy, but also improve weft insertion quality.
With the wide application of electronic technology in the monitoring and monitoring of looms, various enterprises have successively introduced new energy-saving technologies and measures, such as the application of auxiliary nozzle solenoid valve of air-jet looms, from the past 4-6 auxiliary nozzles equipped with one solenoid valve to 2 auxiliary nozzles equipped with one solenoid valve, and the orderly switch of the solenoid valve is controlled by the electric control box to achieve the purpose of air flow relay injection. It is reported that this new technology alone can save 10% - 15% of air consumption. Taking the air-jet loom with 190cm reed as an example, the air consumption of weft insertion of one air-jet loom is 0.5-0.6m3/min, 48 air-jet looms need to be equipped with nearly 40m3 / min air compressor, and one 40m3 / min air compressor needs to be equipped with a motor of dozens of kilowatts. Generally, there are 24-26 auxiliary nozzles in 190cm air-jet loom, and the distance between each auxiliary nozzle in the weft insertion channel is 70-80mm. Because 4-6 auxiliary nozzles are equipped with one solenoid valve, that is, the opening and closing time of 4-6 auxiliary nozzles is the same, so it can not save gas consumption. Now some air-jet looms have two auxiliary nozzles equipped with one solenoid valve, and only two auxiliary nozzles have the same switching time, which creates conditions for saving air consumption. With the increase of loom speed and the decrease of the number of auxiliary sprays controlled by each solenoid valve, the speed of auxiliary nozzle is required to be accelerated. Without high-performance and high-speed solenoid valve, this technology can not be popularized.
In addition to the energy consumption of air weft insertion, the energy consumption of other mechanisms is also very large, mainly the beating mechanism. There are two kinds of beating up mechanisms: crank linkage mechanism and conjugate cam beating up, each of which has its own advantages and disadvantages. The comparison of production practice for more than 20 years shows that the two beating mechanisms meet the production requirements. For some heavy and wide fabrics, the conjugate cam beating up mechanism has its outstanding advantages, while the crank link beating up mechanism is slightly deficient in this respect. For most products, the two mechanisms are exactly the same. In terms of quantity, the air-jet loom uses the crank link mechanism to account for the absolute majority. Rapier loom developed from crank link beating mechanism to conjugate wheel beating mechanism. However, it is not necessary to use conjugate cam beating up mechanism for projectile loom.
Secondly, the opening mechanism. Both the cam opening and the multi arm opening are energy consuming mechanisms. However, the energy consumption of the negative cam is slightly lower than that of the positive cam. The two kinds of cam openings have their own advantages and disadvantages. Users should choose their own according to the specific situation. The energy consumption of Dobby opening is larger than that of cam opening. Toyota company and Tsuda Ju company of Japan have successively launched an electronic dobby with one lifting lever and one servo motor. They have cancelled electromagnets, cams, etc. the energy consumption is much lower than the existing electronic dobby, and the adjustment is also very convenient.
When it comes to air-jet looms, we can't help mentioning air compressors. At present, the air compressor used by domestic enterprises is not very ideal, the efficiency of the compressor is low, and because of the large vibration and noise, the compressor should be installed at a certain distance from the air-jet loom workshop, so the pipeline energy consumption is very large. Japan's air-jet loom manufacturers all use small capacity air compressors. If there are 48 air-jet loom manufacturers, only four small capacity air compressors are needed, three of which a
What are the common yarn dyed corduroy fabricsTime of issue : 2020-06-16
Clothing, food, housing, and transportation are common topics, such as "clothes" we will talk about next. We have to wear all kinds of clothes every day. These clothes have various fabrics, forms and performances, which greatly enrich people's daily life. There is a kind of yarn dyed corduroy fabric which is very common now. It is a new fabric with good texture and hand feeling, and it has a good application in many clothes. In fact, there are many kinds of yarn dyed corduroy. Next, I will show you some common yarn dyed corduroy.
(1) Elastic yarn dyed corduroy: when the elastic yarn dyed corduroy is prepared, a lot of elastic fibers are added, the texture is very elastic, and it has a good tight effect, which is often used to make a variety of tight clothes.
(2) Viscose yarn dyed corduroy: the fabric made of viscose material added into golden yarn dyed corduroy has a good sense of light, color and hand. The color is very bright and can show a very bright luster under the light source.
(3) Colored cotton yarn dyed corduroy: a kind of yarn dyed corduroy made of colored cotton in nature. It is light and thin, and is often used to make fashion clothes that are very popular with young people. It is very beautiful.
(4) Thick and thin yarn dyed corduroy: this kind of yarn dyed corduroy fabric fiber has the effect of rough washing alternation. It is well arranged and has a sense of hierarchy. The clothes made have a good sense of three-dimensional and good perspective effect.