At present, aluminum doors and windows are widely used in buildings in the South and North. This is the advantage and characteristic choice of aluminum alloy doors and windows. In recent years, aluminum alloy doors and windows are more and more popular with broad users because of their light weight, high strength, good airtight function, beauty and economic use. There is no doubt that the aluminum alloy door and window has become the difference between the aluminum doors and windows, which aluminum alloy doors and windows are in urgent demand!
How to distinguish the quality of aluminum alloy doors and windows?
The quality of aluminum alloy doors and windows can be roughly judged from the selection of raw materials (aluminum profiles), the external treatment and internal processing quality of aluminum materials, and the quotation of aluminum alloy doors and windows.
1、 Look at the materials
The thickness, strength and oxide film of aluminum profiles used for excellent aluminum alloy doors and windows should conform to the relevant national standards and regulations. The wall thickness should be more than 1.2 mm, the tensile strength should reach 157 n / m2, the yield strength should reach 108 n / m2, and the oxide film thickness should reach 10 μ M. If not up to the above standards, it is poor quality aluminum alloy doors and windows.
Here is a special note: the current national standard profile thickness is 1.4mm. If the supplier chooses materials with 1.2mm or 1.0mm wall thickness or even thinner, they are all unqualified products. Please pay attention when purchasing.
2、 Look at processing
Excellent aluminum alloy doors and windows, precision processing, sophisticated equipment, good sealing function, switch freely. For poor quality aluminum alloy doors and windows, aluminum profile series and standards are blindly selected, and the processing is shoddy. Sawing is used instead of milling. The equipment is not carried out according to the requirements. The sealing function is poor, and the switch is not free. It not only leaks air and rain, but also presents glass burst phenomenon. When encountering strong wind and external force, some of them will be pushed or pulled or the glass will be blown off or knocked down, causing damage to people.
3、 Look at the quotation
In general, excellent aluminum alloy doors and windows due to high production costs, the quotation is 30% higher than that of inferior aluminum alloy doors and windows. Some aluminum alloy doors and windows with wall thickness of only 0.6-0.8 mm aluminum profiles have tensile strength and yield strength much lower than the relevant national standards and regulations, which is not safe to use.
In addition, now the processing of aluminum alloy doors and windows more self-employed, they do not understand the structural characteristics and functions of aluminum alloy doors and windows. In order to reduce the cost, shoddy, shoddy, the product is more dangerous, generally not suitable for selection. The best choice of standard aluminum alloy doors and windows manufacturers.
Adding a lot of miscellaneous aluminum and waste aluminum can greatly reduce the cost, but it will lead to unqualified chemical composition of building aluminum profiles, seriously endangering the safety of construction projects. Many low-quality aluminum profiles reduce the closing time, reduce the loss of chemical reagents, and reduce the cost. However, the anti-corrosion function of the profile is also greatly reduced. When choosing aluminum alloy doors and windows, it is best to recognize the high promise door and window products.