Aluminum fluorocarbon coating is a critical factor that determines the performance and durability of the final product. The spraying equipment used must ensure excellent atomization, allowing for a uniform coating and even distribution of metal particles within the fluorocarbon layer. This directly affects the visual appeal, including the metallic luster, vivid color, and three-dimensional effect of the finished surface. If improper spray equipment is used, it can lead to uneven color, shading, or poor adhesion, which significantly impacts the decorative quality of the coating. To achieve optimal results, high-voltage electrostatic spray guns are commonly used in the industry. Countries such as the United States, Japan, and Germany have developed various types of spray guns, each with its own unique features and advantages. The fluorocarbon spraying process typically involves multi-layer application to fully leverage the long-lasting properties and weather resistance of Kynar 500 metallic paint. From the initial surface preparation of the aluminum material to the final baking stage, strict quality control measures are essential. The final product must meet the standards set by the American Architectural Manufacturers Association (AAMA-605.02.90), ensuring high-quality performance and aesthetic value. The aluminum fluorocarbon spraying process consists of several key steps: 1. Pre-Treatment Process: This includes degreasing, washing, caustic cleaning, pickling, chromizing, and rinsing with pure water. The purpose of this step is to clean the aluminum surface thoroughly and create a chromium film that enhances adhesion, oxidation resistance, and the overall lifespan of the coating. 2. Primer Coating: As the first layer applied, the primer improves the coating's resistance to penetration, protects the substrate, stabilizes the metal surface, and enhances the adhesion of the topcoat. The thickness of the primer layer is usually between 5 to 10 microns, ensuring a smooth and uniform base for subsequent layers. 3. Topcoat Application: The topcoat is the most visually important layer, providing the desired color and decorative effect while protecting the metal from environmental factors such as acid rain, pollution, and UV radiation. It also enhances the anti-aging properties of the coating. The topcoat is generally thicker, with a standard thickness of 23 to 30 microns. 4. Varnish Coating: Also known as the clear coat, this layer further strengthens the corrosion resistance of the coating, enhances the gloss of the topcoat, and intensifies the color vibrancy. It has a typical thickness of 5 to 10 microns, contributing to the overall durability and visual appeal of the finish. 5. Curing Treatment: After the three layers are applied, they undergo curing in a controlled oven at temperatures ranging from 180°C to 250°C for 15 to 25 minutes. Some manufacturers may adjust these parameters based on their specific coating formulations. In some cases, the two-cure process has been modified to a single cure to improve efficiency without compromising quality. 6. Quality Inspection: A thorough inspection is conducted according to the AAMA-605.02.90 standard to ensure all requirements are met. This step is crucial in maintaining the high quality and consistency of the final product, meeting both functional and aesthetic expectations. The segment assembly formwork system is a new type of non-standard mechanical equipment applied to prefabricated cantilever assembly segment beams. Segmental Formwork,Assembly Formwork,precast concrete formwork,concrete shuttering Anshan Lijian Engineering Group Co. LTD , https://www.lijianformwork.com
Through the analysis and demonstration of segment assembly technology at home and abroad, combined with previous experience in the design, production and construction of bridge formwork, after BY1203 and BY1306, the BY1507 automatic segment box girder prefabrication system was developed and launched. The segmental assembly template includes five parts: outer mold system, bottom mold system, blocking system (fixed end mold and mobile end mold), inner mold system and bottom mold trolley. The advantages of this method are that it occupies a small area, is easy to operate, is relatively small due to terrain restrictions, is relatively convenient to arrange beam fields, and has a high utilization rate of pedestals and templates.