Door and window hardware accessories are indispensable components of aluminum alloy doors and windows. Their performance and quality play an important role in the performance of doors and windows and the use time in the future. With the development of door and window hardware technology, while meeting the market demand, the door and window hardware accessories have been greatly enriched, such as handle, sliding brace, corner device, anti-theft handle, etc., more and more various accessories are transforming the performance of doors and windows.
Doors and windows in modern architecture can be classified according to profiles: plastic steel doors and windows, composite doors and windows, aluminum alloy windows. Among them, aluminum alloy windows are the main building doors and windows products in China, accounting for about 70% of the market share. Due to its long service life, aluminum alloy doors and windows have excellent performance in wind pressure resistance, water tightness, air tightness and environmental protection. The price of aluminum alloy doors and windows is more people-friendly, so it is reasonable to be popular.
Aluminum alloy in natural conditions, the surface is easy to passivate, so usually the surface of aluminum alloy profile will have corresponding anti-corrosion coating. When general metal materials are selected for hardware, the structure of aluminum alloy doors and windows will be the combination of large cathode and small anode.
In addition to the surface anti-oxidation layer, new production technology and material technology are also the key direction to improve the corrosion resistance of door and window hardware accessories. At present, the more popular method abroad is to produce metal parts with excellent appearance and corrosion resistance by using physical vapor deposition (PVD, also known as vacuum plating). Vacuum plating has the advantages of strong adhesion, coating is not easy to fall off, good diffraction property, uniform coating thickness, compact coating, less pinhole bubbles, easy treatment before plating, simple process, less material consumption and pollution-free.
Similarly, through the improvement of alloy formula, more excellent performance, anti-corrosion performance of the emergence of materials, but also for the door and window hardware industry has brought more development opportunities.
With the continuous improvement, large-scale and continuous vacuum plating equipment and the development of coating technology, decorative coatings with good adhesion, strong wear resistance and high brightness can be obtained. In foreign countries, the surface of some accessories such as handle and hinge is plated with Au, Ag, Al, Zr, tin, LC, etc. by vacuum plating, the external surface with excellent comprehensive performance is obtained, which makes the handle, hinge and other single functional accessories become parts with dual performance of use function and decoration.