Technical classification of printing and dyeing machinery at home and abroad
Release time：2020-08-29 Views：
The rapid development of printing and dyeing machinery
In the past two years, new dyeing and finishing processes, new technologies, and new equipment have continuously emerged at home and abroad, showing the vigorous development of the printing and dyeing machinery industry. Energy saving, environmental protection and high efficiency are the sustainable development direction of the dyeing and finishing industry in the 21st century. New technologies and automation technologies such as short process, waterless processing technology, non-plate printing technology, low temperature plasma treatment and so on 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 of textile machinery equipment has also increased rapidly. In 2002, the import of printing and dyeing and finishing machinery was US$618 million, accounting for 19.4% of the total amount of imported equipment, ranking second; in 2003, my country’s import of printing and dyeing and finishing machinery was US$978 million, accounting for 21.10% of the total amount of imported equipment, ranking second. .
At present, the general trend of the development of dyeing and finishing equipment technology is: develop towards environmental protection, energy saving, time-saving and high efficiency, short process, and pay attention to new technologies such as waterless processing technology, non-plate printing technology, and low-temperature plasma treatment; another important trend It is the widespread use of automation technology, the transmission system adopts AC frequency conversion multi-unit synchronous speed regulation system; in the control system, the programmable logic controller (PLC) or industrial computer control (IPC) is widely used, and the online parameter monitoring is generally used, which improves the dyeing and finishing The degree of automation of the equipment greatly improves the process stability and reproducibility.
With the development of dyeing and finishing industry, modern information control technology with electronic computers as the main body has penetrated into various fields of dyeing and finishing machinery. Dyeing and finishing equipment, including electromechanical and instrument integration, automation, man-machine dialogue, process setting, automatic detection and control, and remote diagnosis, are widely used.
In terms of ecological dyeing and finishing technology, the international textile industry has developed rapidly. Domestic and foreign manufacturers are paying more attention to environmental protection and energy saving. The design of dyeing equipment pays attention to the efficiency of the equipment, which is conducive to ecological protection, and strives to optimize the dyeing process and reduce chemical agents. And energy consumption to achieve the purpose of high efficiency, high speed and short process.
Dyeing and finishing production presents the development trend of short process and high efficiency. The short process and high efficiency process equipment that are compatible with it mainly include cold pad pretreatment, wet short steam pretreatment, coil mercerizing, cold pad dyeing, wet Short steam dyeing, coil dyeing and high liquid feed device, etc.
The trend of individualized, comfortable, functional, and fashionable textiles promotes the development of dyeing and finishing equipment to adapt to the trend of small batches, multiple varieties and one machine with multiple functions.
The current dyeing and finishing trend is based on ecological concepts to develop new technologies and new equipment, combined with technology, dyeing materials, auxiliaries and other multi-channel research and development. Such as the use of waterless processing technology, non-plate-making printing technology, low-temperature plasma treatment technology, nanotechnology, biological enzyme technology, etc., making the finishing process of printing and dyeing shorter, higher production efficiency, and better product performance. New technologies and new equipment mainly have the following aspects:
New technology for continuous processing of knitted fabrics. The continuous open-width 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 by about 10% to 15%. Improvement of mercerizing machine. An extra-wide cloth clamp straight roll mercerizing machine suitable for woven fabric processing with nominal widths of 3200 mm and 3400 mm. A five-roll or two-roll thread micro-tentering device is added between the straight roll alkali soaking zone and mercerizing stabilization zone, which can effectively prevent the weft shrinkage caused by the fabric immersed in concentrated alkali.
Digital jet printing. Digital jet printing with a revolution in printing technology, the printing speed has reached (360dpi) more than 25 square meters per hour.
Online monitoring of alkali concentration. The "Alkali Concentration Computer Online Monitoring System" developed by Xi'an Degao Jiamei Printing and Dyeing Co., Ltd. has a good human-machine interface. The whole machine is controlled by a large-size color LCD touch screen, which is intuitive to display, easy to operate, and clear at a glance; through PID adjustment, it is not excessive The best control, with high precision and high stability.
In recent years, the degree of electromechanical integration of dyeing and finishing and equipment in my country has been improved to a certain extent, and the application scope of electronic technology has been continuously expanded. In product design, modularization and building blocks are emphasized; the electric drive is stable and reliable, and the tension is adjustable, so that the man-machine-environment can be fully coordinated. However, there is still a considerable gap between my country's dyeing and finishing equipment and the advanced level of foreign countries. Such as poor automatic control and program control, online monitoring has no real solution; remote monitoring and fault diagnosis technology cannot be achieved in our country; quantitative titration and automatic feeding are not matched. The main gaps are as follows: Dyeing and finishing equipment process parameters online detection technology: in the process of dyeing and finishing pretreatment, mercerizing, dyeing, steaming, and finalizing, the online detection of certain process parameters has always been a key technology for printing and finishing. The problem, the main requirement is to detect, convert and control the parameter signal in time in the process of rapid parameter changes during dyeing and finishing, and work stably and reliably. The current key issue is to develop a sensor that can detect color difference, alkali concentration, hydrogen peroxide concentration and other parameters. After these parameters are obtained in time, the production process can be adjusted and controlled, which can greatly improve dyeing and finishing quality, reduce consumption, increase production rate, achieve higher repeatability, and maintain process stability.
Development of new equipment: At present, it still lags behind the textile machinery powerhouse in terms of dyeing and finishing technology innovation. Dyeing and finishing equipment manufacturers must provide corresponding dyeing and finishing equipment according to product requirements, and they need to provide new fibers such as Lycar, Tencel, Lyocell, Modal, etc. Special requirements, develop suitable processing equipment.
Manufacturing precision and supporting parts: The manufacturing precision of dyeing and finishing equipment, the quality and reliability of supporting parts are poor. It lags far behind in new materials, new processes, and new manufacturing technologies. The material of key parts is very important, especially the wearing parts such as bearings and guide rollers should be improved in quality.
Energy saving and environmental protection: The development of printing and dyeing equipment should be closely coordinated with the development of technology and dyeing materials. Further research should be made on the one-step de-boiling and bleaching method, dyeing wet steaming and other processes and equipment, and the use of high-efficiency units and heat recovery to solve energy saving and consumption reduction Speed up the development and application of heat transfer printing technology, alkali recovery device, foam finishing, airflow dyeing technology and equipment to meet the increasing environmental protection requirements.
After-sales service: Our after-sales service capability is far from meeting the needs of enterprises. Compared with the international advanced level in serving enterprises, there is a big gap. We should fundamentally attach importance to after-sales service and regard service as an important means to improve and perfect the technical level of equipment.