Aluminum sheets, as the name suggests is made of aluminum or aluminum alloy material made of plate. Or by the flat aluminum embryo by heating, rolling and straightening or solid solution aging heat and other processes made of plate aluminum products.
Aluminum used in the building, including single-layer aluminum, composite aluminum and other materials, generally refers to the single-layer aluminum (also called a single aluminum or pure aluminum), used in architectural decoration works, in recent years in the aluminum curtain wall single-layer aluminum The more common. Aluminum curtain wall is also a form of curtain wall, simply made of aluminum instead of glass curtain wall, aluminum curtain wall used for wall protection and non-lighting walls. Such as the Guangzhou World Trade Center, on the use of the Southwest aluminum processing plant plate processing different arc of aluminum nearly 150 tons, the surface using electrostatic spraying. Foreign aluminum curtain wall has been selected single-layer aluminum. Single-layer aluminum plate is generally made of pure aluminum. Aluminum plate thickness of 3mm, in order to strengthen the aluminum plate surface strength, in the back of the aluminum plate, must be installed ribs (existing manufacturers uneasy), ribs made of thick aluminum, first with a flash welder to a screw cap Welded on the back of the aluminum plate and then put the ribs into the screws into the screws, fixed with screws.
China in order to reduce the weight of aluminum, aluminum plate strength, we use aluminum alloy plate, often use No. 21 rust-proof aluminum code LF21 pressed aluminum plate for the curtain wall aluminum. Aluminum plate thickness from the original 3mm reduced to 2.5mm, the strength of the alloy than pure aluminum about twice. Reinforcement with LF21 aluminum belt, the width of aluminum tape thickness depends on the aluminum plate, generally thick 2-2.5mm, width 10-25mm. Aluminum curtain wall of the back of the aluminum Why should the installation of stiffeners, is the case of positive and negative pressure in the outside, the aluminum will not be a depression, two will not bulge, so to avoid the aluminum wall and repeated vibration inside and outside the vibration sound. If you need insulation, can be inside the aluminum plate, placed rock wool, slag cotton or foam treatment.
Curtain wall aluminum surface treatment, can be divided into two methods, one is anodized, the other is electrostatic spraying. Anodized oxide film is generally more than 12μ, the color is only bronze and white two, color monotonous, more serious shortcomings is the color of each piece of aluminum plate color varies, many pieces of curtain wall panels together to form a curtain wall overall effect Very ugly. This shortcoming can be said that can not be eliminated, not the production technology, but because the aluminum plate is not a batch number, chemical composition, there are small differences, coupled with oxidation when the electrolyte current density and other factors can not be exactly the same, so oxidation of the color of how many are different, leaflets may not be obvious, if all together is very obvious. So the aluminum plate curtain wall aluminum surface treatment, must not be used anodized.