In the past two years, new dyeing and finishing technol […]
In the past two years, new dyeing and finishing technologies, new technologies and new equipment have emerged at home and abroad, showing the momentum of the global printing and dyeing machinery industry. Energy conservation, environmental protection and high efficiency are the direction of sustainable development of dyeing and finishing industry in the 21st century. Short processes and new technologies such as automation technology, non-plate printing technology, low temperature plasma treatment and waterless processing technology are the development trends of dyeing and finishing machinery in the future. Since CITME '22002: Machine tools, accession to the WTO is a challenge and an opportunity. Experts pointed out that it is necessary to increase the research and development of CNC machine tools in China. Accelerate the development of popular CNC machine tools. The service competition of China's machine tool manufacturing industry. The current situation and prospects of China's milling machine and machining center market. The technical level and development direction of lathes The production, demand and development of world machining centers Trends in the development of machine tools at home and abroad World CNC system development trends Cutting technology and CNC machine tools development Modern machine tool product technology development trend China's high-speed machining technology status and development trend utilization Advanced Manufacturing Technology Improves Automotive Piston Processing Horizontal Caps and Bottle Molds Special Threads CNC Turning Deep Hole Thread Machining CNC Lathe Thread Cutting Method Analysis and Application Grinding Worm Grinding Wheel Trimming Precision Parts Multi-step Surface Grinding New Method Crankshaft Tracking grinding process of connecting rod neck
In the past two years, new dyeing and finishing technologies, new technologies and new equipment have emerged at home and abroad, showing the momentum of the global printing and dyeing machinery industry. Energy conservation, environmental protection and high efficiency are the direction of sustainable development of dyeing and finishing industry in the 21st century. Short processes and new technologies such as automation technology, non-plate printing technology, low temperature plasma treatment and waterless processing technology are the development trends of dyeing and finishing machinery in the future. Since CITME'2002, China's textile industry has achieved great development, the speed of industrial upgrading has been greatly accelerated, and the purchase volume of textile machinery equipment has also increased rapidly. In 2002, the import and dyeing and finishing machinery imported was 618 million US dollars, accounting for 19.4% of the total imported equipment, ranking second. In 2003, China imported 978 million US dollars of printing and dyeing and finishing machinery, accounting for 21.10% of the total imported equipment. the first.
At present, the general trend of dyeing and finishing equipment technology development is: development towards environmental protection, energy saving, time saving and short process, focusing on new technologies such as waterless processing technology, non-plate printing technology, low temperature plasma treatment; another important trend It is widely used in automation technology. The transmission system adopts AC frequency conversion multi-unit synchronous speed control system. In the control system, programmable controller (PLC) or industrial computer control (IPC) is widely used. The parameters online monitoring are widely used to improve dyeing and finishing. The degree of automation of the equipment has greatly improved the process stability and reproducibility.
With the development of the dyeing and finishing industry, modern information control technology based on electronic computers has penetrated into various fields of dyeing and finishing machinery. Dyeing and finishing equipment electromechanical integration, automation, man-machine dialogue, process setting, automatic detection and control, remote diagnosis and other means are widely used. In terms of ecological dyeing and finishing technology, the international textile industry is developing rapidly. Domestic and foreign manufacturers pay more attention to environmental protection and energy conservation. The dyeing equipment pays attention to the efficiency of equipment in the design scheme, which is conducive to ecological and environmental protection, and strives to optimize the dyeing process and reduce chemical agents. And the consumption of energy to achieve efficient, high-speed, short-flow purposes.
Dyeing and finishing production shows short-flow, high-efficiency development trends, and short-flow, high-efficiency process equipment, mainly including cold-rolled pre-treatment, wet short steam pre-treatment, coil mercerizing, cold-rolled pile dyeing, wet Short steam dyeing, roll dyeing and high liquid feeding equipment.
The trend of personalized, comfortable, functional and fashionable textiles has led to the development of dyeing and finishing equipment to adapt to the trend of small batches, multiple varieties and multi-purpose machines.
The current world dyeing and finishing trend is to develop new technologies and new equipment based on ecological concepts, and to carry out research and development in combination with processes, dyeing materials and additives. Such as the use of waterless processing technology, no plate printing technology, low temperature plasma treatment technology, nanotechnology, biological enzyme technology, etc., make the finishing process after printing and dyeing shorter, higher production efficiency, better product performance. New technologies and new equipment mainly have the following aspects:
The new process of continuous processing of knitted fabrics. The continuous flat dyeing and finishing of knitted fabrics not only improves the quality, but also has less damage to the fabric, and has good flexibility and reproducibility, and can reduce the production cost of the mercerizing machine by about 10% to 15%. The wide-width cloth-clamp straight-roller is suitable for woven fabrics with a nominal width of 3,200 mm and 3,400 mm. A five-roll or two-roll thread micro-pulling device is added between the straight roll alkali-immersed zone and the mercerized stable zone, which can effectively prevent the weft shrinkage caused by the fabric being impregnated with concentrated alkali. Digital jet printing. Digital jet printing with a revolution in printing technology, printing speed has reached (360dpi) 25 square meters / hour or more.
The alkali concentration is monitored online. The “alkaline concentration computer online monitoring system” developed by Xi'an Degaojia Printing & Dyeing Co., Ltd. has a good man-machine interface. The whole machine is controlled by a large-size color liquid crystal touch screen. The display is intuitive, easy to operate, and the status is clear at a glance; The best control, with high precision and high stability.
In recent years, the degree of mechatronics of dyeing and finishing and equipment in China has been improved to some extent, and the application range of electronic technology has been expanding. Emphasis on modularity and building blocks in product design; electrical drag is stable and reliable, and the tension is adjustable, so that the human-machine-environment can be fully coordinated. However, compared with the advanced level in foreign countries, there are still considerable gaps in China's dyeing and finishing equipment. If the automation control and program control are poor, online monitoring is not really solved; remote monitoring and fault diagnosis technology can not be done in China; quantitative titration, automatic feeding is not matched. The main gaps are as follows: on-line detection technology of dyeing and finishing equipment process parameters: in the process of dyeing and finishing, mercerizing, dyeing, steaming and shaping, the on-line detection of some process parameters has always been the key technology of printing and dyeing and finishing. The main requirement of the problem is that during the dyeing and finishing process, the detection, conversion and timely control of the parameter signal during the rapid change of parameters, and work stably and reliably. The key issue at present is to develop a sensor device capable of detecting parameters such as chromatic aberration, alkali concentration, and hydrogen peroxide concentration. After obtaining these parameters in time, the production process can be adjusted and controlled, which can greatly improve the dyeing and finishing quality, reduce the consumption, improve the production rate, achieve higher reproducibility and maintain process stability.
Development of new equipment: At present, the dyeing and finishing technology innovation still lags behind the world textile machinery power, dyeing and finishing equipment manufacturers should provide corresponding dyeing and finishing equipment according to the requirements of the products, which need to be new fibers Lycar, Tencel, Lyocell, Modal, etc. Special requirements to develop suitable processing equipment.
Printing and dyeing machinery manufacturers can only welcome future development with new technologies. At present, compared with foreign printing and dyeing equipment, domestic printing and dyeing equipment has little difference in shape and basic use function, and the main gap is still reflected in stability and reliability. Although digital on-line detection and control technology, computer network technology and other high-tech are constantly introduced into the manufacture of printing and dyeing equipment, the automation of domestic printing and dyeing equipment is continuously improved, energy consumption and water consumption are gradually reduced, and the three major problems of color difference, latitude and shrinkage are gradually improved. Improvement, but the stability and the problem of running the leak still exist. This requires printing and dyeing equipment companies to pay attention to both the ideological and practical ways to take action. In addition, it is a problem of driving rate. Foreign companies attach great importance to a driving rate, and their equipment has a high driving rate. Relatively speaking, domestic equipment has yet to be further improved in this respect.