Method 1:
We can start with the following aspects about the material knowledge of aluminum alloy doors and windows.
1. Thickness: there are 70 series and 90 series in aluminium alloy sliding door, and 70 series can be used for aluminium alloy sliding door inside the house. The number of series indicates the number of millimeters of the door frame thickness construction dimension. Aluminium alloy sliding window has four types: 55 series, 60 series, 70 series and 90 series. Series selection should be based on the size of the window hole and the local wind pressure value. The aluminium alloy sliding window used as a closed balcony shall not be less than 70 series.
2. Strength: the tensile strength should reach 157 newton per square millimeter, and the yield strength should reach 108 newton per square millimeter. When purchasing, you can use your hands to bend the profile moderately, and you should be able to recover after loosening your hands.
3. Color: the color of the same aluminum alloy profile should be the same. If the color difference is obvious, it is not suitable to buy.
4. Flatness: check the surface of aluminum alloy profile, there should be no depression or bulging.
5. Gloss: aluminum alloy doors and windows avoid choosing profiles with open bubbles (white dots) and Ash (black dots) on the surface, as well as obvious defects such as cracks, burrs, peeling, etc.
Method 2:
Door & window profile? The selection method is as follows:
Enable mode
In the series of products, profile section and accessories have their overall unity in installation. When selecting profiles according to the opening mode of the window, we should pay attention to whether the profiles are opened inside or outside, whether they are pushed and pulled left and right or pulled up and down, and select profiles specially designed for this type of opening mode according to different opening modes.
Heat transfer coefficient K
The heat transfer coefficient K of the whole window is determined by the heat transfer coefficient of the door and window frame and the glass heat transfer coefficient. Comprehensive consideration should be taken to meet the specified heat transfer coefficient requirements.
For the heat transfer coefficient of commonly used aluminum alloy profiles and glass, see 3.4.2 Thermal insulation performance design.
Sound insulation performance the sound insulation performance of doors and windows Rw Crt, or Rw C) depends on the frame structure, glass structure and glass inlay mode.
Glass embroidered glass inlay mode, glass weight and thickness affect the selection of door and window frame leaf profiles and accessories. The slot width of window frame and fan profile should be able to accommodate the thickness of glass and the glass sealing material on both sides.
Anti-wind pressure performance Selected profiles should be able to meet the requirements of anti-wind pressure performance of doors and windows.
You can choose according to experience first, and then check the wind pressure. If the window is used in high-rise buildings or the window size is large, the wind pressure resistance performance must be calculated.
