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1, the material：
The main timber of aluminum alloy window generally includes three aspects: aluminum, glass, hardware, high-quality aluminum alloy used in aluminum wall thickness of not less than 1.4mm, the oxide film thickness should reach 10 microns; tempered glass Entry "toughened glass" Encyclopedia provided by the industry) is better than ordinary glass; stainless steel hardware accessories (such as screws, hinges, handles, etc.) better than aluminum parts.
2, the processing:
High-quality aluminum windows, fine processing, tangential smooth, the same point of view (the main frame is usually 45 degrees or 90 degrees), the splicing process should not appear obvious gaps, sealing performance, switch smoothly. Poor quality aluminum alloy windows, especially aluminum alloy outdoor window products, may cause sealing problems if they are not machined. Not only the air leaks and leaking, but also the glass will burst and fall under the action of strong wind and large external force.
3, the appearance：
Window surface should not have obvious scratches, scratches, bumps and other defects. Adjacent components on the window colored surface should not have significant color difference. Window surface should not have aluminum, burrs, oil spots or other stains, assembly joints should not be spilled adhesive.
4, performance：
The performance of aluminum windows usually have to consider the following aspects: Strength, reflected in the selection of aluminum alloy window profiles, is able to withstand the ultra-high pressure; airtightness, mainly reflected in the window structure, the window of the fan and outside Frame structure is tight and so on; watertightness, the main assessment of aluminum alloy windows there is water, leakage phenomenon; sound insulation, which mainly depends on the insulation effect of insulating glass and other special soundproof strip structure and the opening and closing force, Durability of other window fittings such as open-lock durability.
5, the price:
In general, the aluminium tube supplier's price of high quality aluminum alloy is 30% higher than that of inferior aluminum alloy window. Low quality aluminum alloy window usually adopts recycled aluminum extrusion aluminum material with a large amount of impurities. Some of the used aluminum materials have non-standard wall thickness, Whether it is from the tensile strength or yield are much lower than the relevant state regulations, such aluminum windows, aluminum windows, in particular, is not safe, so do not choose the time of purchase cheap and contempt yourself Other people's personal safety.
