Color Coated Steel Plate are widely used in many industries because of their good appearance and advanced technology. A key step in the production process is the coating process, which requires some control over the thickness of the coating. The usual methods for controlling the color coated coating are:
One is the use of pressure sensors, one is controlled by a magnetic scale. We use magnetic tape + pressure sensor technology, with magnet control between the take-up roll, metering roll and coating roll, and pressure sensor control between the coating roll and the strip. The position value between each roller and the pressure value between the coating roller and the strip are displayed on the operation panel.
Color Coated Steel Plate main feature is its comprehensive performance, its good weather resistance and machinability, which can fully meet the general requirements of building exterior use. With the continuous development of technology, in order to meet more demand, color-coated steel plates have also introduced a lot of patterns, which can meet the needs of users.Color Coated Steel Plates are many types of paints for painting color coated steel sheets. The commonly used primers are available in the following types and can be customized according to customer requirements. Polyester primer: good adhesion to color coated steel substrate, excellent flexibility, sensitive to humid environment, chemical resistance is not as good as epoxy primer. Epoxy primer: good adhesion, water resistance, alkali resistance, chemical resistance, is an early primer for coils but not as flexible as other primers. Polyurethane primer: It has the advantages of chemical resistance, durability and flexibility, and is a primer with relatively good comprehensive performance. Water-soluble acrylic primer: good adhesion to the substrate, good flexibility, low organic solvent content, low temperature curing. The color coated steel plate primer needs to be painted according to the environment used, and a reasonable choice.
The color coated steel plate will be in contact with the impurities in the air during use, so we have to clean it regularly for a long time. We often use two methods such as cleaning degreasing treatment and using chemical cleaning agent. The clear elution grease treatment mainly utilizes the dissolution, saponification, emulsification, wetting, infiltration and mechanical action of the industrial chemical cleaning solution to remove oil stains and impurity particles on the surface of the substrate.
At present, the chemical cleaning solution used in most production lines is basically composed of a complexing agent, a surfactant, sodium hydroxide, potassium hydroxide, polyphosphoric acid and the like, and is an alkaline solution. The effect of clearing the grease depends mainly on the concentration of the cleaning solution, the temperature, and the cleaning time of the steel strip. Pay attention to controlling the concentration and temperature of the cleaning solution during the cleaning process. If the concentration of the cleaning solution is too low, the surface of the substrate is not cleaned, resulting in defects in the subsequent coating treatment and affecting the quality of the coating. If the concentration is too high, the zinc and aluminum in the galvanized sheet belong to an amphoteric metal, and zinc in the hot alkaline solution. The surface of the aluminum layer is prone to form a heart acid salt, causing severe corrosion, thereby affecting the subsequent chemical coating effect.
