After years of development, door and window materials have undergone many changes and finally stabilized temporarily. At present, aluminum alloy is the dominant door and window material in the market, and plastic steel also has some consumers. With the popularity of the market, aluminum alloy profiles also began to "high-end aluminum alloy doors and windows" production design, but when the market is not mature, use these four moves to purchase, can step on a lot of misunderstandings.
1、 Look at the surface quality of products
Of course, when the surface quality of doors and windows is not good in the early stage, the staff should not pay attention to the surface quality of the doors and windows, so they should not only pay attention to the surface quality of the windows and doors in the early stage, but also pay attention to the quality of the surface
1. The decorative surface of doors and windows shall be free from obvious damage, and the protective film on the surface of doors and windows shall not have scratch marks.
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; there should be no adhesive overflow at the assembly joint; there should not be too many nail holes exposed outside, which would affect the appearance.
2、 Range of qualified dimension deviation
High end aluminum alloy doors and windows products will have a qualified size deviation range, and the smallest size deviation is better. Those beyond the scope are unqualified products. For example, there is a standard that the width and height of the slot of the door and window frame should be ≤ 2000mm, and the allowable deviation range is ± 1.0mm; the perpendicularity of the front and side of the door and window frame (including the splicing material) is ≤ 2000mm, and the allowable deviation range is ≤ 2.0mm, etc.
3、 Material requirements
Aluminum alloy doors and windows products in the material materials will have five requirements, good material thickness to be qualified, strength to be hard enough, profile surface should be no obvious depression or bulge, in fact, should not be dull, glossy bright, oxide film thickness should reach 10 microns.
4、 The connecting parts are firm
The connecting parts between high-end aluminum alloy doors and windows should also be firmly connected, so as to have advantages.