Now the broken bridge aluminum doors and windows market has gradually become the mainstream of the door and window market, with the larger and larger market, the inferior quality is replaced by the real one, and the situation that the false is confused with the real one is also constantly emerging. So, how to choose good broken bridge aluminum doors and windows?
1. First of all, from the appearance
Intuitive feeling: the protective film on the surface of good aluminum alloy profiles has no scratch, scratch marks, aluminum chips, burr, oil stains and other stains, no obvious color of adjacent components, no overflow of adhesive at the assembly joint, and small size deviation of door and window frames. The inferior aluminum alloy doors and windows do not have the above advantages, on the contrary, the processing is rough and shoddy, when cutting, the work is not fine.
2. Next is to see whether the materials of doors and windows meet the standard
For example, the wall thickness should be more than 1.2 mm, the tensile strength should be 157 n / m2, the yield strength should be 108 n / m2, and the oxide film thickness should be 10 μ M. Those who fail to reach the above standards are inferior and unqualified aluminum alloy doors and windows.