23 Jun, 2021
1. From the point of view of materials, the thickness, strength and oxide film of high-quality aluminum door and window machinery should meet relevant standards. The wall thickness should be greater than 1.2 mm, the tensile strength should reach 157 Newtons per square millimeter, the yield strength should reach 108 Newtons per square millimeter, and the oxide film thickness should reach 10 microns. If it does not meet the above standards, it is a low-quality aluminum alloy door and window equipment and cannot be used.
2. Look at processing. High-quality aluminum alloy door and window equipment, fine processing, exquisite installation, good sealing performance, and convenient opening and closing. Inferior aluminum door and window machinery blindly choose aluminum profiles and specifications, rough processing, sawing instead of milling, not installed as required, poor sealing performance, difficult to open and close, not only leaking wind and rain, cracking the glass, but also when encountering strong winds and external forces , It is easy to scratch or knock off the sliding parts or glass, and damage things.
3. Look at the price. Under normal circumstances, due to high production costs, the price of high-quality aluminum door and window machinery is about 30% higher than that of inferior aluminum door and window machinery. The tensile strength and yield strength of some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only 0.6-0.8mm are far lower than the relevant standards and are unsafe to use. In addition, there are currently many self-employed individuals who process aluminum alloy doors and windows and do not understand the structural characteristics and performance of aluminum alloy doors and windows.
4. The current standard profile thickness is 1.4mm. If the supplier chooses a material with a wall thickness of 1.2mm or 1.0mm or even thinner, it is an unqualified product. Please pay attention when buying.