In recent years, with the rapid development of China's economy and technology, steel drum manufacturing technology has also developed rapidly. From the aspects of products, processes, materials, equipment and theoretical research, etc., it has started to be in line with international standards. Today, we briefly introduce the latest technological developments in the Chinese steel barrel manufacturing industry.
I. International common development of steel drum products
As China's opening up to the outside world further deepens, the national standard steel drums are limited in export packaging. In recent years, a number of steel drum companies in China have begun to improve the product's international generalization. Among them, the ISO international standard steel drums, container special steel drums and tapered open steel drums are developing rapidly. Drum closures have been fully internationalized.
The ISO international steel drums are mostly used for the packaging of export chemical products. With a standard diameter of 571mm and a 42-gallon capacity, this is the most promising steel drum product in China.
Container special steel barrels, often referred to as W-bar steel barrels in the industry, are developed in accordance with national standards and Italian standards. They are transition products between national standard steel barrels and international standard steel barrels. The maximum diameter of ring steel bars of such steel drums is smaller than the national standard steel drums, which not only saves the space occupied by steel drums in container transportation, but also strengthens the strength of steel drums.
Cone-opening steel drums are produced entirely in Italy and are used for the packaging of food ingredients. They have been widely used in western China and are mainly used for the export packaging of ketchup and jam. The main characteristic of this kind of steel drum is that the empty barrels have lower transportation costs and are easy to recycle and handle. The space occupied in container transportation is relatively reasonable.
The structure and dimensions of the closed-end steel drum sealer have completely adopted the internationally-standard British-style sealer, which fully realizes the international general transition.
Second, the development of environmental protection of steel drum raw and auxiliary materials
The raw and auxiliary materials used in the manufacture of steel drums have started to move forward in the direction of environmental protection, especially for the use of thin steel plates and the application and research of environmentally friendly coatings.
In recent years, the slimming of steel drums has been the main development direction of China's steel drum products. Currently, various companies have adopted a thin steel sheet of 0.8-1.0 mm to produce 200-liter steel drums, and a large number of 0.6-1.0 mm steel drums have been used in tapered open drums and other fields. 0.8mm thin steel plate production saves resources and reduces the cost of steel drums.
The most prominent development in the development of paint coating for steel drums is the development of waterborne coatings and powder coatings. As environmental pollution caused by VOCs produced by organic solvent-based coatings has received widespread attention, in recent years, water-based coatings and powder coatings have begun to be used for coating steel drums in China. This is also the main development direction for future steel drum coatings. .
As for the internal coating of steel drums, China has developed rapidly. The steel drum special inner coatings based on Shanghai Xugong Coatings have entered the world's advanced ranks, and many of these coatings have obtained international certification.
In recent years, China's pre-coated steel coils have developed rapidly. In the near future, pre-coiled coils will be used in large quantities in the steel barrel manufacturing industry to become the main raw material for the production of steel barrels. The coating process of steel barrels from the steel barrel production process Remove, really achieve environmental protection and efficient production.
Third, a variety of advanced technology in the production of steel drums
In order to improve the product quality and production efficiency of steel drums, many advanced technologies have been applied in steel drum production in recent years. Among them are galvanized barrel zinc replenishment technology, steel drum surface treatment process, multi-color steel barrel coating process, screen printing process, thermal transfer printing process, enamel leak detection technology and so on.
In the production of steel drums from galvanized steel sheets, the zinc layer at the weld seam was damaged. In order to perform the zinc coating on the weld seam, Shanghai developed an automatic zinc welder to improve the quality and production efficiency of the weld zinc.
In order to obtain a better coating quality, most of the current drum companies have established a steel drum surface treatment production line, the use of advanced surface treatment process and treatment liquid, greatly improving the coating quality and production efficiency.
Now, with the continuous increase in market demand, multi-color coating of steel drums has become the main direction of development. We use high-pressure airless spraying technology to achieve the multi-color coating of steel drums. Currently, barrel making companies are improving their processes to meet the coating needs of multi-color steel drums.
The development of China's Dacromet coating technology has provided a new coating method for steel drums. It can replace galvanization and is the best alternative process for the production of galvanized barrels. It not only effectively reduces environmental pollution, but also reduces production. cost.
In recent years, a large number of screen printing and thermal transfer printing processes have been widely used in the sign printing of steel drums in the printing industry. A series of new printing processes suitable for steel drum printing have been continuously transformed to accommodate Drum sign printing production.
In order to improve the accuracy of the leak detection process of steel drums, we have developed a helium-mass spectrometer leak detector adapted to the production of steel drums. This technology has entered the advanced ranks of the international barrel making industry.
Fourth, the latest development of steel drum manufacturing equipment
In recent years, with the continuous development of the Chinese steel barrel market and the intensification of competition, users not only have higher requirements on the quality of steel barrels, but also have put forward higher requirements on the production efficiency of steel barrels. This has further enhanced the specialization of China's barrel making equipment and achieved constant innovation in multiple competitions.
At present, a number of companies have realized the transformation of fully automatic production lines for unwinding and blanking of steel coils. Some of the more advanced companies have realized full-automatic production such as unwinding, leveling, blanking and forming, scrap cutting, punching at the mouth of a barrel, coiling and pressing, and stacking of finished products. This has greatly improved production efficiency and reduced labor costs.
The transformation of the seam welding machine and the successful development of the automatic seam welding machine have made the barrel making equipment a major step forward. In order to improve product quality, many domestic enterprises in recent years have reformed the original domestic semi-automatic seam welder, improved the control system and mechanical devices, reduced seam welding to 4mm, and improved production efficiency, eliminated the spot welding positioning process. . The automatic steel barrel seam welding machine developed by Shenzhen Juntengfa has been successfully achieved, which has improved the seam welding efficiency by a factor of 4 and greatly improved the quality, making the dream of fully automated seam welding of most domestic barrel enterprises become a reality. .
The mid-stage processing equipment for steel drums has developed rapidly in China. Currently, more than a dozen companies have professionally developed and produced barrel-making equipment, forming a new situation in which hundreds of flowers bloom. New types, high-quality, and high-efficiency barrel-making equipment continue to emerge, as well as some barrel-making equipment exported abroad, which is well received by foreign friends. At present, China's barrel making equipment market has entered a new round of fierce competition. This situation is conducive to innovation and improvement of equipment. In the near future, China's barrel making equipment will surely enter the world's advanced ranks.
The development of steel drum coating equipment is the fastest growing branch of the barrel making equipment, because steel drum users have higher and higher requirements for painting, and the painting equipment continues to innovate and improve. At present, many companies have achieved automated production of multi-station, multi-color, high-pressure airless spraying, and full automation of gas and fuel drying. These equipments not only have high production efficiency and process quality, but also fully consider the requirements of environmental protection. Due to the application of various environmental protection technologies, the pollution of the coating production line to the environment is continuously reduced. The catalytic combustion environmental protection furnace that has been successfully developed by Shanghai Qiaosheng has realized the recovery and reuse of exhaust gas in the coating drying room, which not only reduces environmental pollution, but also saves energy and reduces costs.
For the printing of steel drum signs, a variety of screen printing machines and thermal transfer printing machines have been developed in China to achieve automatic production. This not only improves the printing quality, realizes color printing, but also improves the production efficiency.
The steel barrel tan quality leak detection technology is achieved through the development of an automatic steel barrel leak detector. The success of the steel bucket tanned automatic leak detector developed by Hefei Puyi has been successfully applied in the barrel making industry, making the traditional pressure seepage The leak tester has gradually become a thing of the past, greatly improving the accuracy of leak detection, and the surface quality of the steel drum has been ensured because of no longer using soap, thereby improving the product quality and production efficiency.
Fifth, the progress of theory and practice has led to continuous improvement of barrel making technology
After years of development, the barrel making industry in China has made great progress in barrel making technology. This is inseparable from the long-term and unremitting efforts of the technicians of the barrel making industry.
The only magazine in China's barrel making industry, "Steel Drum," has been established for more than 20 years. It plays an extremely important role in the development and popularization of technology in the barrel making industry and is a historical witness to the technological development of the barrel making industry.
The continuous research and innovation practice of the barrel making technology has gradually formed a complete technical field. Recently, the “steel barrel manufacturing technology†edited by industry expert Yang Wenliang and others has been published. This is a complete completion of the technology of the Chinese barrel making industry. In summary, it will provide theoretical guidance for the overall development of the technology of the barrel industry, and it will become a milestone in the technology development of China's barrel industry.
We have reason to believe that as China's barrel making industry gradually moves toward the world, China's barrel making technology will catch up with and surpass the world's most advanced level in the near future.