Five characteristics of inferior aluminum profiles


Release time:

2019-03-13

Aluminum alloy doors and windows are important home decorations for contemporary people. They are popular for their light weight, beauty and durability. High-quality aluminum alloy doors and windows can improve our quality of life and happiness, and inferior aluminum alloy doors and windows, its follow-up maintenance costs, manpower, material resources continue, the most important is the existence of security risks. Aluminum alloy doors and windows inferior aluminum profiles have five characteristics. The thickness of the oxide film is thin. The national standard stipulates that the thickness of the oxide film of the building aluminum profile should not be less than 10um (microns). The thickness is not enough, the surface of the aluminum profile is easy to rust and corrode. Sampling some of the production name, site, production license, certificate of aluminum profiles, its oxide film.

aluminum alloy doors and windows are important decorations for contemporary people's homes. They are popular for their light weight, beautiful appearance and durability. High-quality aluminum alloy doors and windows can improve our quality of life and happiness, and inferior aluminum alloy doors and windows, its follow-up maintenance costs, manpower, material resources continue, the most important is the existence of security risks. Aluminum alloy doors and windows inferior aluminum profiles have five characteristics.
thin oxide film thickness
national standard building aluminum oxide film thickness should be not less than 10um (microns). The thickness is not enough, the surface of the aluminum profile is easy to rust and corrode. In the sampling inspection, some aluminum profiles without production name, factory site, production license and certificate have an oxide film thickness of only 2 to 4um, and some even have no oxide film. According to experts' estimation, for every 1um oxide film thickness reduction, the power consumption cost per ton of profile can be reduced by more than 150 yuan.
Unqualified Chemical Composition
Aluminum profiles mixed with a large amount of miscellaneous aluminum and waste aluminum can greatly reduce costs, but it will lead to unqualified chemical composition of building aluminum profiles, seriously endangering construction engineering and home safety. The wall thickness of
profile has been reduced to
90 series sliding window type. According to national standards, the minimum wall thickness of aluminum profile is not less than 1.4mm, while the products of some manufacturers are only 0.6 to 0.7mm. 46 series of ground bounce door type, the minimum wall thickness of aluminum profile used in national standards is not less than 1.62mm, which is under sampling inspection, but some products of some regional manufacturers are only 0.97 to 1.18mm.
sealing time is reduced
inferior aluminum profile greatly reduces the sealing time, reduces the loss of chemical reagents, reduces the cost, but the corrosion resistance of the profile is also greatly reduced.
is insufficient in weight and too light
In order to reduce the weight of aluminum and pursue the so-called "high profit", some aluminum manufacturers reduce the weight of aluminum doors and windows per square meter, thus reducing the cost of aluminum doors and windows, meeting the needs of some aluminum door and window manufacturers to bid for price reduction, and producing thin-walled aluminum profiles-there are potential safety hazards in the process of use. Because the profile section of each series is carefully calculated to meet the stress requirements and determine the shape of the profile section and the thickness of the wall. It cannot be thinned at will without calculation, otherwise the strength will be significantly reduced. On July 19, 1991, a typhoon hit the Chaoshan area of Guangdong Province. Many aluminum alloy doors and windows were blown off by the strong wind, and many people were injured. A 1910 square meter aluminum alloy door and window frame of a building was blown out, and more than 40 units were damaged. Only Shantou City lost 1.83 million yuan. Why is the road so seriously damaged, all destroyed aluminum doors and windows, almost thin-walled aluminum profile manufacturing the most book is only 0.6mm thick. In Shantou, aluminum alloy doors and windows with a thickness of more than 1.4mm are rarely damaged. Therefore, thin-walled aluminum profiles are truly shoddy products.
normal aluminum profile wall thickness: 70 series, 90 series aluminum window wall thickness in 1.2~1.4mm, aluminum door profile should be in 1.2~2.0mm, aluminum alloy curtain wall thickness should be more than 3mm. The thin wall of aluminum profile does not meet the standard or is too thin, and the future trouble is serious and tiring. Therefore, do not choose unsafe aluminum alloy doors and windows for too low a price.