Printing and dyeing machinery automation technology trend analysis
In the past two years, the new dyeing and finishing technologies, new technologies, and new equipment at home and abroad have continuously emerged, showing the momentum of the vigorous development of the global printing and dyeing machinery industry. Energy conservation, environmental protection, and high efficiency are the directions for the sustainable development of the dyeing and finishing industry in the 21st century. New technologies such as short flow and automation technology, unprinted plate printing, low-temperature plasma processing, and waterless processing technology are the development trends of future dyeing and finishing machinery. Since 2002, the Chinese 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 rapidly increased. In 2002, imported printing and dyeing and finishing machinery accounted for 618 million U.S. dollars, accounting for 19.4 percent of the total amount of imported equipment, ranking second; in 2003, China imported 978 million U.S. dollars for printing, dyeing, and finishing machinery, accounting for 21.10% of the total amount of imported equipment. the first.
The current general trend of dyeing and finishing equipment technology development is: to environmental protection, energy saving, time-saving and efficient, short process development, attention to waterless processing technology, no plate printing technology, low temperature plasma processing and other new technologies; another important trend Is widely used in automation technology, transmission system uses AC variable frequency multi-unit synchronous speed control system; in the control system, extensive use of programmable controller (PLC) or industrial computer control (IP), the general application of parameter monitoring, to improve the 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 technologies based on electronic computers have penetrated into various fields of dyeing and finishing machinery. Dyeing and finishing equipment, electromechanical instrument integration, automation, man-machine dialogue, process setting, automatic detection and control, remote diagnosis and other means are widely used. In the field of eco-dyeing and environmental protection technology, the international textile industry has developed rapidly. Domestic and foreign manufacturers are paying more attention to environmental protection and energy conservation. Dyeing equipment focuses on the efficiency of the equipment in the design program, which is conducive to ecological and environmental protection, and strives to optimize the dyeing process and reduce chemical agents. And energy consumption to achieve high-efficiency, high-speed, and short-flow processes. Dyeing and finishing production shows a trend of short flow and high efficiency. The short-flow, high-efficiency process equipment that is compatible with it mainly includes pre-treatment before cold-rolling, wet and short-steam pretreatment, mercerizing, cold-rolling, and heap-dyeing, and wet Short steam dyeing, roll-rolling dyeing, and high liquid feeding devices.
The trend of individualized, comfortable, functional and fashionable textiles has promoted the development of dyeing and finishing equipment to adapt to the trend of small batches, multiple varieties, and multiple uses of one machine.
The current trend of dyeing and finishing in the world is to develop new technologies and new equipment based on ecological concepts, and to develop R&D in combination with processes, dyes, auxiliaries and other channels. Such as the use of water-free processing technology, no plate printing technology, low-temperature plasma processing technology, nano-technology, biological enzyme technology, etc., making the printing and dyeing finishing process flow shorter, higher production efficiency, product performance is better. The new technology and new equipment mainly have the following aspects:
Knitwear continuously processes new processes.
Continuous continuous dyeing and finishing of knitted fabrics not only improves the quality, has little damage to the fabric, but also has good flexibility and reproducibility, and can reduce the production cost of the mercerizing machine by about 10% to 15%. Nominal width of 3200 mm, 3400 mm, suitable for woven fabric processing, wide-width cloth straight-roller mercerizing machine. A five- or two-roll thread micro-stitching device has been added between the soaking alkali area and the mercerizing stable area of ​​the straight roll, which can effectively prevent the weft shrinkage caused by fabric impregnation with concentrated alkali. Digital inkjet printing. The digital jet printing with the printing technology revolution has reached a print speed of (360dpi) 25m2/h.
Alkaline concentration on-line monitoring. The "Alkaline Concentration Computer Online Monitoring System" developed by Xi'an Degao Jiamei Printing and Dyeing Co., Ltd. has a good man-machine interface. The control of the whole machine adopts a large-size color liquid crystal touch screen. The display is intuitive, the operation is convenient, and the state is clear at a glance; The best control, with high precision and high stability.
In recent years, the degree of electromechanical integration between dyeing and finishing and equipment in China has been somewhat improved, and the application range of electronic technology has been continuously expanding. Modularization and building blocks are emphasized in product design; electrical drag is stable and reliable, tension is adjustable, and man-machine-environment can be fully coordinated. However, there is still a considerable gap between China's dyeing and finishing equipment and foreign advanced level. If the automation control and program control are poor, on-line monitoring has not really been resolved; remote monitoring and fault diagnosis technology can not be achieved in China; quantitative titration, automatic feeding is not complete. The main gaps are the following: On-line detection technology of dyeing and finishing equipment: In the process of dyeing and finishing pretreatment, mercerization, dyeing, steaming, and setting, the on-line detection of certain process parameters has been the key technology for printing and dyeing and finishing. The main requirement of the problem is the detection, conversion, and timely control of parameter signals during the rapid change of parameters during the dyeing and finishing process, and they work stably and reliably. The current key issue is to develop a sensor device capable of detecting parameters such as color difference, alkali concentration, and hydrogen peroxide concentration. Obtaining these parameters in time to adjust and control the production process can greatly improve the quality of dyeing and finishing, reduce the consumption, increase the production rate, achieve high reproducibility, and maintain the process stability.
The development of new equipment: Currently in the dyeing and finishing technology innovation is still lagging behind the world's textile machinery power, dyeing and finishing equipment manufacturers need to provide corresponding dyeing and finishing equipment according to product requirements, need for the new fiber Lycar, Tencel, Lyocell, Modal, etc. Special requirements, the development of suitable processing equipment. Printing and dyeing machinery manufacturers can only meet the future development with new technologies. At present, compared with foreign printing and dyeing equipment, domestic printing and dyeing equipment has little difference in appearance and basic function. The main difference is still reflected in stability and reliability. Although high-tech technologies such as digital on-line inspection and control technology and computer network technology have been continuously introduced into the manufacture of printing and dyeing equipment, the degree of automation of domestic printing and dyeing equipment has been continuously improved, energy consumption and water consumption have been gradually reduced, and three major problems of color difference, slackness and shrinkage have gradually been resolved. Improvement, but poor stability and runaway problems still exist. This requires that printing and dyeing equipment companies should not only pay attention to ideological issues, but also must come up with practical and feasible measures. In addition, it is a question of the driving rate. Foreign companies attach great importance to the first-time driving rate, and the driving rate of their equipment is very high. Relatively speaking, domestic equipment has yet to be further improved in this regard.
The current general trend of dyeing and finishing equipment technology development is: to environmental protection, energy saving, time-saving and efficient, short process development, attention to waterless processing technology, no plate printing technology, low temperature plasma processing and other new technologies; another important trend Is widely used in automation technology, transmission system uses AC variable frequency multi-unit synchronous speed control system; in the control system, extensive use of programmable controller (PLC) or industrial computer control (IP), the general application of parameter monitoring, to improve the 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 technologies based on electronic computers have penetrated into various fields of dyeing and finishing machinery. Dyeing and finishing equipment, electromechanical instrument integration, automation, man-machine dialogue, process setting, automatic detection and control, remote diagnosis and other means are widely used. In the field of eco-dyeing and environmental protection technology, the international textile industry has developed rapidly. Domestic and foreign manufacturers are paying more attention to environmental protection and energy conservation. Dyeing equipment focuses on the efficiency of the equipment in the design program, which is conducive to ecological and environmental protection, and strives to optimize the dyeing process and reduce chemical agents. And energy consumption to achieve high-efficiency, high-speed, and short-flow processes. Dyeing and finishing production shows a trend of short flow and high efficiency. The short-flow, high-efficiency process equipment that is compatible with it mainly includes pre-treatment before cold-rolling, wet and short-steam pretreatment, mercerizing, cold-rolling, and heap-dyeing, and wet Short steam dyeing, roll-rolling dyeing, and high liquid feeding devices.
The trend of individualized, comfortable, functional and fashionable textiles has promoted the development of dyeing and finishing equipment to adapt to the trend of small batches, multiple varieties, and multiple uses of one machine.
The current trend of dyeing and finishing in the world is to develop new technologies and new equipment based on ecological concepts, and to develop R&D in combination with processes, dyes, auxiliaries and other channels. Such as the use of water-free processing technology, no plate printing technology, low-temperature plasma processing technology, nano-technology, biological enzyme technology, etc., making the printing and dyeing finishing process flow shorter, higher production efficiency, product performance is better. The new technology and new equipment mainly have the following aspects:
Knitwear continuously processes new processes.
Continuous continuous dyeing and finishing of knitted fabrics not only improves the quality, has little damage to the fabric, but also has good flexibility and reproducibility, and can reduce the production cost of the mercerizing machine by about 10% to 15%. Nominal width of 3200 mm, 3400 mm, suitable for woven fabric processing, wide-width cloth straight-roller mercerizing machine. A five- or two-roll thread micro-stitching device has been added between the soaking alkali area and the mercerizing stable area of ​​the straight roll, which can effectively prevent the weft shrinkage caused by fabric impregnation with concentrated alkali. Digital inkjet printing. The digital jet printing with the printing technology revolution has reached a print speed of (360dpi) 25m2/h.
Alkaline concentration on-line monitoring. The "Alkaline Concentration Computer Online Monitoring System" developed by Xi'an Degao Jiamei Printing and Dyeing Co., Ltd. has a good man-machine interface. The control of the whole machine adopts a large-size color liquid crystal touch screen. The display is intuitive, the operation is convenient, and the state is clear at a glance; The best control, with high precision and high stability.
In recent years, the degree of electromechanical integration between dyeing and finishing and equipment in China has been somewhat improved, and the application range of electronic technology has been continuously expanding. Modularization and building blocks are emphasized in product design; electrical drag is stable and reliable, tension is adjustable, and man-machine-environment can be fully coordinated. However, there is still a considerable gap between China's dyeing and finishing equipment and foreign advanced level. If the automation control and program control are poor, on-line monitoring has not really been resolved; remote monitoring and fault diagnosis technology can not be achieved in China; quantitative titration, automatic feeding is not complete. The main gaps are the following: On-line detection technology of dyeing and finishing equipment: In the process of dyeing and finishing pretreatment, mercerization, dyeing, steaming, and setting, the on-line detection of certain process parameters has been the key technology for printing and dyeing and finishing. The main requirement of the problem is the detection, conversion, and timely control of parameter signals during the rapid change of parameters during the dyeing and finishing process, and they work stably and reliably. The current key issue is to develop a sensor device capable of detecting parameters such as color difference, alkali concentration, and hydrogen peroxide concentration. Obtaining these parameters in time to adjust and control the production process can greatly improve the quality of dyeing and finishing, reduce the consumption, increase the production rate, achieve high reproducibility, and maintain the process stability.
The development of new equipment: Currently in the dyeing and finishing technology innovation is still lagging behind the world's textile machinery power, dyeing and finishing equipment manufacturers need to provide corresponding dyeing and finishing equipment according to product requirements, need for the new fiber Lycar, Tencel, Lyocell, Modal, etc. Special requirements, the development of suitable processing equipment. Printing and dyeing machinery manufacturers can only meet the future development with new technologies. At present, compared with foreign printing and dyeing equipment, domestic printing and dyeing equipment has little difference in appearance and basic function. The main difference is still reflected in stability and reliability. Although high-tech technologies such as digital on-line inspection and control technology and computer network technology have been continuously introduced into the manufacture of printing and dyeing equipment, the degree of automation of domestic printing and dyeing equipment has been continuously improved, energy consumption and water consumption have been gradually reduced, and three major problems of color difference, slackness and shrinkage have gradually been resolved. Improvement, but poor stability and runaway problems still exist. This requires that printing and dyeing equipment companies should not only pay attention to ideological issues, but also must come up with practical and feasible measures. In addition, it is a question of the driving rate. Foreign companies attach great importance to the first-time driving rate, and the driving rate of their equipment is very high. Relatively speaking, domestic equipment has yet to be further improved in this regard.
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