ã€China Aluminum Industry Network】 Aluminum alloy doors and windows are profiles that will be surface treated. Through the processing of blanking, punching, milling, tapping, and window manufacturing, the door and window frame components are assembled together with the connecting parts, seals, and opening and closing hardware.
Aluminum alloy doors and windows according to its structure and opening and closing methods, can be divided into sliding doors and windows, flat doors and windows, rotary doors and windows, screen doors and windows, shutters, fixed windows, suspended windows. In accordance with the different appearance of color, aluminum alloy doors and windows can be divided into silver, gold, bronze, bronze, black and yellow and so on. According to the different production series (according to the width dimension of the cross section of the door and window profile), aluminum alloy doors and windows can be divided into 38 series, 42 series, 50 series, 54 series, 60 series, 64 series, 70 series, 78 series, 80 series, 90 series, 100 series and so on.
Aluminium alloy doors and windows must go through rigorous performance tests before they leave the factory, and they can be installed and used only after they meet the specified performance specifications. Aluminum alloy doors and windows usually assess the following main properties:
1. Strength The strength of aluminum alloy doors and windows is expressed in the pressure rating of the air pressure applied in the pressure chamber during the pressure test of the compressed air. The unit is N/m2. General performance of aluminum alloy doors and windows can reach 196l ~ 2353N/m2 high-performance aluminum alloy window up to 2353 ~ 2764N/m2. Under the above-mentioned pressure, the central displacement of the window case is measured to be less than l/70 of the height of the inner edge of the window frame.
2. The airtight aluminum alloy window is in the pressure test chamber, so that a pressure difference of 4.9 to 9.4 N/m2 is formed before and after the window, and the air-tightness of the window per m2 area (m3) represents the airtightness of the window. The unit is M3/(h?m2). When the general performance aluminum alloy window front and back pressure difference is 9.4N/m2, the airtightness can reach 8m3/(h?m2) or less, and the high-sealing aluminum alloy window can be up to 2m3/(h?m2).
3. Watertight aluminum alloy window In the pressure test chamber, a sine wave pulse pressure of 2 s is applied to the outside of the window. At the same time, artificial rain of 4 liters per minute per m2 was sprayed into the window to conduct a continuous “wind and rain†test for 10 min. There should be no visible leakage of water in the room. The watertightness is expressed by the average pressure of the pulse air pressure applied during the test. The general performance aluminum alloy window is 343N/m2, and the high-performance window resistance to typhoon can reach 490N/m2.
4. Opening and closing force When the glass is installed, the external force required to open or close the window case should be 49N or less.
5. Sound Insulation The sound transmission loss of the aluminum alloy window was tested in an acoustic laboratory. It can be found that when the acoustic frequency reaches a certain value, the acoustic transmission loss of the aluminum alloy window tends to be constant. With this method, the sound insulation performance level curve was determined. The acoustic loss of the aluminum alloy window with sound insulation requirements can reach 25 dB, that is, the sound level can be reduced by 25 dB after the sound passes through the aluminum alloy window. High sound insulation of aluminum alloy windows, acoustic loss through the loss of grade curve 30 ~ 45dB.
6. Thermal Insulation The thermal insulation performance is usually expressed in terms of the thermal convection resistance of the window and the unit is m2?h?C/KJ. Generally divided into three levels: R1 = 0.05, R2 = 0.06, R3 = 0.07.
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