[China Aluminum Network] Aluminum alloy doors and windows with its excellent characteristics, has been widely appreciated by users. Under normal circumstances, high-quality aluminum alloy doors and windows due to high production costs, the price is about 30% higher than inferior aluminum alloy doors and windows. Some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only 0.6-0.8 mm have much lower tensile strength and yield strength than the relevant national standards and are not safe to use. In the selection of aluminum alloy doors and windows should pay attention to the following identification:
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A look at the materials. High-quality aluminum alloy doors and windows used in aluminum, thickness, strength and oxide film, etc., should comply with relevant national standards, wall thickness should be more than 1.2 mm, tensile strength of 157 newtons per square meter mm, yield strength to achieve each Square millimeters 108 Newtons, oxide film thickness should reach 10 microns. If it fails to meet the above criteria, inferior aluminum alloy doors and windows cannot be used.
Manufacturers who have formal or production licenses indicate the product's marks in the obvious parts of their aluminum alloy doors and windows products, including manufacturer's name or trademark, product name, product model or mark, manufacturing date or serial number. There should be obvious “moisture proof†and “carefully light†and “upward†words and signs on the packing box.
Second, see processing. High-quality aluminum alloy doors and windows, fine processing, installation stress, good sealing performance, switch freely. Inferior quality aluminum alloy doors and windows, blind selection of aluminum profiles and specifications, rough processing, and saw cutting instead of milling, not installed as required, poor sealing performance, switches are not comfortable, not only leakage of air leakage and glass burst phenomenon, but also To strong winds and external forces, it is easy to scrape or fall off the push-pull part or glass, destroying things and hurting people.
The connection of the aluminum alloy door and window member should be firm, and the connection part should be sealed and waterproofed with a corrosion-resistant filler material. The quality of the surface quality of doors and windows directly affects the decorative effect of the entire wall after installation. When checking the surface quality of doors and windows, pay attention to the following aspects:
1. There should be no obvious damage to the decorative surface of doors and windows. It means that the protective film on the surface of windows and doors should not have scratches and scratches. 2. There should be no obvious color difference on the colored surface of adjacent components on doors and windows.
3. There should be no aluminum chips, burrs, oil spots or other stains on the surface of doors and windows, and there should be no spilled adhesive at the assembly joints.
Three to see the price. Under normal circumstances, high-quality aluminum alloy doors and windows due to high production costs, the price is about 30% higher than inferior aluminum alloy doors and windows. Some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only 0.6-0.8 mm have much lower tensile strength and yield strength than the relevant national standards and are not safe to use. In addition, there are many self-employed aluminum alloy doors and windows, and they do not understand the structural characteristics and performance of aluminum alloy doors and windows. In order to reduce the cost of cutting corners, shoddy products, the hidden danger of the product is generally not suitable. It is better to use the products of regular aluminum alloy door and window manufacturers.
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