1. Profile specifications and standards
Aluminum alloy profiles: The wall thickness of the main profile used for main stress-bearing members such as exterior door and window frames, sash, and truss frames should be determined by design calculation or testing . The minimum measured wall thickness of the base material in the main stress-bearing part of the main profile section is not less than 2.0mm for external doors and not less than 1.4mm for external windows.
Aluminum alloy profiles are the main materials for the production of aluminum alloy doors and windows. Commonly used profile specifications for aluminum alloy sliding windows include 70 series, 75 series, 80 series, 85 series, 90 series, etc. Commonly used profile specifications for aluminum alloy casement windows include 45 series, 50 series, 55 series, 60 series, etc. Appropriate profiles should be selected according to the product design requirements of aluminum alloy doors and windows.
2. Aluminum profile thickness standards
At present, the cross-sectional geometric dimensions of aluminum alloy profiles for aluminum alloy doors and windows have been serialized, and the product standard "Aluminum Alloy Doors and Windows" (GB/T 8478— 2008) stipulates that the minimum measured wall thickness of profiles for the production of aluminum alloy doors and windows should not be less than 1.1mm. However, currently in the aluminum alloy profile market, some manufacturers are thinning the thickness of aluminum alloy profiles in order to pursue profits one-sidedly. Due to the thin wall and insufficient strength, under the action of large loads, it is easy to damage the surface or deform the doors and windows, reducing the Improve the wind pressure resistance of aluminum alloy doors and windows.
3. Surface coating standards
The surface coating of aluminum alloy doors and windows plays a role in protecting the surface of aluminum alloy profiles. It mainly includes oxide film, electrophoretic painting, powder spraying, fluorine coating, etc. There are four surface treatment methods of carbon spraying, and wood grain transfer treatment based on powder spraying, with a wide variety of colors. Due to different surface treatment methods, the cost of coating thickness meter is different. Therefore, the choice of surface coating should be comprehensively considered based on factors such as the climate conditions of the location of the building, the location of use, the grade of the building, and economic conditions. . If coastal areas are severely eroded by sea wind, thicker coatings must be used. Oxide films should not be used in areas with severe acid-base conditions.
IV. Selection criteria for accessories
The accessories used for aluminum alloy doors and windows should be reasonably selected according to the design requirements and categories of doors and windows. For example, the color of the locks for aluminum alloy sliding windows can be selected according to the design. Zinc alloy die-cast products are commonly used, and the surface is chromium-plated or coated; the hinges and sliding stays of aluminum alloy casement windows should be made of stainless steel. The thickness of the steel sheet should not be less than 1.5mm, and there should be a tension adjustment device. The slider is generally made of copper. The handle tail is made of zinc alloy die-casting products with chromium plating or film coating on the surface. It can also be made of aluminum alloy products with surface oxidation.
V. Material preparation standards for aluminum alloy doors and windows
(1) According to the design requirements, select various aluminum alloy profiles that meet international requirements and have valid warranty certificates.
(2). Use cotton gauze to scrub the surfaces of various selected profiles. If there is oil stains, use water-soluble detergent.