Third, the steel drum coating process and equipment requirements
When coating steel drums, after selecting the appropriate coating, the corresponding construction technology and construction equipment should be selected according to the requirements of the coating, and the coating should be covered on the surface of the steel drum. To minimize coating defects, maximize the utilization rate of coatings and the labor productivity of painting operations, improve the painting and construction working conditions, reduce the pollution to the environment, and obtain the best protection and decorative coating Layer to meet the use requirements of steel drums.
The coating process of steel drums has undergone conventional brushing and air spraying to develop today's high-pressure airless spray and electrostatic spray. Compared with traditional spraying methods, high-pressure airless spraying and electrostatic spraying are characterized by high efficiency, energy saving, and material saving. Currently widely used in the barrel industry. However, due to the different production conditions of the various barrel companies, the coating process and equipment for selecting steel barrels are also different. However, in general, the following should be considered when selecting the drum coating process and equipment.
1. Positioning of process and equipment according to the production scale and production efficiency of the company and the quality of employees
As the shape of steel drums is relatively simple, the production volume of each production company is also very different, and the degree of emphasis on product quality is also different. Therefore, the requirements for production processes and equipment are also different.
2, according to the characteristics of the paint used to choose the appropriate coating equipment for coating construction
This is because the high-pressure airless spray method and the electrostatic spray method have their own characteristics. The high-pressure airless spray method can spray common viscosity paints and spray high-viscosity thick film paints; and the electrostatic spray method can spray liquid paints. Spray powder coatings; most of these coatings require baking, so heating control equipment that satisfies the baking conditions (time and temperature) should also be selected to meet the baking requirements of the coating.
3. The use environment and conditions of steel drums and the requirements for steel drums for coating quality and film performance
With the development of the market, the application of steel drums has become more and more extensive. Users' requirements for steel drums are also getting higher and higher, especially for export steel drums. In addition to meeting the requirements of the steel drum national standards, they should also be higher than the national standards, including the inner quality and surface of the steel drums. quality. The surface quality of the steel drum, in addition to its good surface adhesion, gloss and coating thickness, also requires good weather resistance and corrosion resistance. The baking film of the steel drum usually has better coating performance.
4, according to the surface conditions of steel drums and the use of conditions to select the appropriate pre-processing equipment
At present, petrochemical companies are increasingly demanding the packaging of their products, especially for steel drums used for filling advanced lubricants (such as transformer oil, aircraft oil, etc.), not only requiring that the inner wall of the drum be extremely clean but also requires steel. The surface quality of the barrel is better. That is, it is required that the coating film on the surface of the drum should be sturdy, secure, smooth, and shiny. For this reason, in order to meet user requirements and the need for steel drums to be exported with their products, many steel drums are required to be processed before the painting process and equipment before degreasing, rust removal, phosphating, etc. during the production process. Treatment to ensure the coating quality of steel drums.
5, to choose efficient, energy-saving equipment
With the advancement of technology and the scarcity of resources, and considering the economic benefits from the coating of steel barrels, when selecting the coating of steel barrels, we should try our best to choose moderate cost, high coating efficiency, high coating utilization rate, and coating qualification rate. High, high production efficiency coating equipment. The use of energy-saving, high-traditional baking equipment and far infrared baking equipment.
6, should pay attention to environmental protection factors
With the further development of environmental protection measures, various production enterprises must pay attention to the environmental pollution of their products during production. We must choose the coating equipment for steel drums from the perspective of ease of operation, protection of the construction environment, and the health of construction workers and environmental protection.
In short, when selecting the surface coating method and coating equipment for steel drums, the above factors to be considered are not isolated, but are linked and mutually restricted. Therefore, it is necessary to properly select the coating that is most suitable for the steel drums of the company. The method and coating equipment are installed to achieve the effects of high quality (good coating performance), high production (large number of coating), high pay (high coating utilization rate, high production efficiency, low cost) and energy saving.
Fourth, the steel drum coating work environment requirements
Another important factor to ensure the quality of steel coating is to have a suitable coating environment, which includes the following:
1. The lighting in the coating workshop is good and the brightness is even
Drums should have proper brightness in the painting area of ​​the paint shop, but direct sunlight should be avoided to facilitate operation.
2. The drum painting shop should have proper temperature and humidity
The air temperature and humidity of paint shop have a great influence on the coating performance of steel drums. If they are not properly mastered, they will cause various defects on the surface coating of steel drums. Different manufacturers' paints require different temperature and humidity when coating due to their different volatility and construction performance. Therefore, under normal circumstances, paints from the same manufacturer should be selected as much as possible.
3. Cleanliness of air in steel drum painting workshop
When coating, the air in the coating area of ​​the drum must be kept dry, clean, with little or no dust. The dust in the air adheres to the coating film on the surface of the steel drum not only affects the appearance quality of the steel drum, but also reduces the coating performance and durability. Therefore, the production environment of the coating shop should be maintained.
4, steel drum painting workshop must be well ventilated, suitable for ventilation
It is required that the air in the paint shop of steel drums should continuously flow, on the one hand, it can accelerate coating drying; on the other hand, it can dilute the concentration of harmful substances in the workshop and improve the working conditions and hygienic conditions of the paint shop.
5, steel drum coating shop should pay attention to fire and explosion
During the coating process, steel drums will volatilize a large amount of solvent vapors, and when mixed with air, explosive gases can be formed at any time. If exposed to fire, they are prone to explosion and combustion. Therefore, open flames are not allowed in steel drum painting workshops, and all electrical equipment is explosion-proof. In addition, a sufficient number of fire extinguishers must be configured. To ensure the safety of the paint shop.
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