Development History and Characteristics of Air Floatation Oven

Air floating oven is heated by heat source, and air is heated by electricity or natural gas. The hot air is delivered to the gas collector through the centrifugal fan, and the hot air is evenly distributed to each nozzle through the gas collector to dry the coating. The air blowing from the nozzle to both sides of the paper web replaces the traditional roller conveying system, so the air used to transport and support the paper web can dry the double-sided coating at the same time. Coating equipment is now widely used in the drying of modern coating processing technology, such as coating film (optical film, protective film, solar back film, etc.), coated paper, pressure-sensitive tape, filter media (reverse osmosis membrane), soft packaging materials, lithium battery (electrode piece), non-woven fabric, food and medical supplies produced in clean workshops, etc.
1. Development history of air floating oven
Although the concept of air floating oven was put forward as early as last century, this technology was proposed by Roy Downe in the United States as early as 1970, but it was not widely used until the 1980s. The rapid development of the American printing industry in the 1980s greatly promoted the development of the air floating oven technology. The air flotation drying technology of Japanese enterprises was introduced and developed from the United States; European technology also comes from American technology; China's air flotation technology was introduced from Japan. At present, most enterprises in the United States use environmentally friendly air floating ovens instead of traditional drum ovens. It can be said that the air floating oven has become the mainstream of the modern coating industry.
2. Principles of air floating oven
The principle of aerodynamics is to use the pressure of air nozzle or guide rail to realize the stable operation of substrate in the oven. The professional design of the nozzle and guide rail determines whether the "suspension" stability of the paper web can be truly achieved, avoiding detours and tremors, and achieving the uniformity of drying.
3. Features and advantages of air floating oven
(1) The air floating guide rail, through the air transmission, avoids the direct contact between the product and the box, thus ensuring that the product surface is free of scratches and ensuring the cleanliness of the product, which is a big difference from the traditional drum oven. In the production of precision products such as optical films, this advantage of air floating oven is quite significant.
(2) Various nozzles, air guides and fins can be well combined according to customer requirements to meet different drying rates; Ensure even drying and avoid drying outside and inside.
(3) Meet special double-sided coating requirements. In addition, the double-sided heating process makes the drying efficiency higher, reduces the box length (less land occupation), and the internal circulation of hot air, with lower energy consumption; Higher application speed is allowed.
(4) Low tension requirements can effectively prevent the product from breaking during transmission.
(5) Low maintenance cost. The air guide rail can be disassembled and cleaned freely, thus reducing the maintenance cost of the bearing. Because of its special structure, it is easier to meet the requirements of the clean room.
4. Industry position of air floating oven
After years of development, the technology of air floating oven is quite mature. The obstacle to the implementation of imported air floating oven in China is the high price. It is a good choice to choose domestic products.