1. Development status and trends of compact spinning technology at home and abroad
1. Introduction to the principle of compact spinning
Foreign compact spinning The main purpose of research on spinning devices is to improve the quality of ring yarn through changes in spinning technology to meet high-grade fabrics and weaving requirements. This new spinning process method has completely changed the performance of the yarn. The research perspective is to add an air suction device before twisting the sliver, and through the action of negative pressure, the loose fibers can be gathered in a straight line as much as possible On the other hand, the twisting triangle area on the traditional ring spinning machine is eliminated, so that the fibers can be twisted in a parallel and tight state. Due to the uniform force and tight cohesion of each fiber in the yarn, the yarn structure and quality have undergone a qualitative mutation, and the hairiness, strength, evenness, wear resistance and appearance have been significantly improved.
2. The development and current situation of foreign compact spinning
Compact spinning first appeared at itma’99 in Paris. Currently, it has There are five compact spinning systems with different structures, namely products from rieter, sussen, mal, zinser and toyt companies. They have different aggregation methods, but the aggregation principles are the same.
(1) The COM4 concentrated spinning system of Swiss Rieter Company: Its core technology is to change the front roller to a dust cage type to achieve air extraction, and a built-in non-rotating inclined tube to allow air to circulate It has a condensation effect to achieve the purpose of gathering yarn strips.
(2) The other types all add a pneumatic bunching area to the original spinning drafting system, and the negative pressure form uses a mesh ring or apertured apron. to achieve cohesion. Due to patent rights, each company uses different active and passive transmission forms and upper and lower forms of condensed yarn to avoid similarities. However, due to the different lengths, angles, and methods of the condensed grooves, the final effects are also different. Comprehensive analysis, we believe that Sussen’s eliter aggregation method, agglomeration time, aggregation length and the closest entry point to the twisting grip are minimally different from the original spinning form, which is especially ideal for equipment modification.
3. The development and current situation of domestic compact spinning
At present, domestic textile manufacturers in Shanghai, Wuxi, Dongtai, Shanxi, Hebei and other places Machine factories and research schools are developing compact spinning systems, but there is no commercial production yet. Among textile production companies, only three companies in Shandong and Xinjiang have introduced products from Rieter’s com4 and Toyota in batches, but they are expensive. Several domestic companies have introduced the drafting part of Sussen Company, but the scale is small and in the exploratory stage. By the first half of 2003, Wuxi Yimian was the only domestic enterprise that absorbed Sussen technology on a large scale and successfully carried out localization transformation.
2. Transformation of compact spinning device on domestic ring spinning equipment
my country has officially joined the WTO, and the textile industry There will be new opportunities and challenges. The application of high and new technologies will be the key to whether the textile industry can be at the forefront of the world. It is particularly urgent to use high and new technologies to transform traditional industries. At present, customers have increasingly higher requirements for products, and the existing quality cannot meet the requirements of finished products. Since the characteristics of compact spinning yarns have an upgrading effect on textile products, research on new technologies for compact spinning has become the most popular key research topic in the spinning field.
In view of the current situation of domestic textile machinery development and some uncertain factors such as high investment in the introduction of complete machines, high risks, and market uncertainty, we boldly envisage transforming domestic equipment to improve quality. , reduce costs and reduce investment risks. If the transformation is successful, the investment cost will be reduced by 50% compared with the introduction of the warping machine. Through technical consultation with the German Sussen Company, relying on Wuxi Yimian’s strong variety development strength and good corporate mechanism, and combining the characteristics of the national FA506 spinning frame, we carried out the transformation of compact spinning technology into domestic equipment. After nearly two months of hard work, the test of 24 ingots was completed, and a prototype was produced in November 2001. After continuous testing, plan modification, variety development, and market development, it became increasingly mature, and the transformation was launched in early 2002. At present, it has formed a production capacity of 65,000 spindles, and its yarn performance has reached the world-class level. It has successfully implemented the transformation of compact spinning equipment on localized equipment, filling the gap in domestic hairless ring-spun yarn production.
1. The key factors for successful transformation of domestic equipment
There are mainly the following five aspects
(1) Formulation and implementation of localization transformation plan for compact spinning device:
(2) Through agglomeration principle and flow field analysis in agglomeration area, carry out agglomeration area Research on the “complete aggregation” effect:
(3) Study the materials and surface conditions of the aggregation elements to reduce the wear of the aggregation device as much as possible;
(4) Research and optimize the shape and size parameters of the air flow guide elements to make the air flow concentrate towards the yarn body as much as possible;
(5) No hairiness , high-strength, soft-gloss fine yarns and specialty yarn raw materials
Programs, production processes, operation management, equipment maintenance methods, product positioning research tests and market development.
2. Key technologies for the transformation of fa506 spinning frame
(1) The constraints of compact spinning transformation The connection and matching between stretching components and domestic fa506 spinning frame.
(2) The fa506 spinning frame is equipped with a negative pressure air suction device and is properly arranged.
(3) Modify the transmission components to balance the transmission of concentrated spinning.
(4) Matching of electrical components to meet production requirements.
3. Process routes and key technology solutions
Compact yarn production process and transmission��Carry out comprehensive research on technical advantages, set up semi-finished product quality research team, equipment research team, operation method research team, process quality and variety inspection team, market development team, etc. to study customer needs and potential needs, and study international advanced level and competitors, study the acceptance price and cost-benefit relationship of customer products, and conduct system engineering research from the market to the site, and from products to customers. Great breakthroughs have been made in terms of technology, equipment, quality control, product positioning, and market development.
Therefore, the successful development of a project is built on a technology, management, and planning platform. Simply updating equipment and increasing investment will not achieve great results.
Through nearly two years of research and practice, we have reached a consensus consistent with many experts – the world of ring spinning in the future belongs to compact spinning.
5. The practical significance of the transformation of compact spinning equipment
The cotton spinning industry is the largest pillar industry in my country’s textile industry. However, the product quality is not high and the added value is low. Therefore, accelerating the localization transformation and product development of compact spinning has positive significance for maintaining and enhancing the important position of my country’s textile industry in the international textile market. Its promotion will greatly enhance the competitiveness of my country’s yarn in the international market. Since the textile industry provides a large amount of yarn and cloth products as raw materials to downstream industries such as knitting, printing and dyeing, yarn-dyed weaving, home textiles
clothing, etc., it has a great impact on downstream industries. Therefore, high-quality compact spinning will be of great significance to improving the grade of clothing fabrics, expanding exports, replacing imports, and improving the overall quality level of my country’s textile industry. The market prospects and promotion and application fields are extremely broad, and will play a role in promoting the development of the national economy. effect. Bring vitality to the development of my country’s textile industry. </p
