[China Glass Network] First, the identification of profile quality
High-quality profiles, from the appearance, the surface of the oxidized pigmented film is smooth and smooth, smooth and clean, pure color, no decolorization; no bubbles, smooth lines, silver cut on the cut surface, no black; corrosion resistance, good rigidity, durable, then The selection of profiles should be judged from the following aspects:
1. See if the materials meet the standards: high-quality insulating glass doors and windows use high-quality profiles, while inferior insulating glass doors and windows use low-grade profiles, such as “slimming†products, the current market profile is only 0.66mm (based on The national standard shall have the wall thickness requirement of the aluminum profile. The wall thickness standard of the profile shall be 1.2 ± 0.23 mm, the tensile strength shall be 157 N per square millimeter, the yield strength shall be 108 N per square millimeter, and the thickness of the oxide film shall be 10 μm. If the above standard is not met, it is regarded as inferior aluminum profile), and there are even secondary recycling profiles that have been moved hands and feet (the appearance of a film with a well-known profile, shoddy).
2, look at the fineness of the appearance: the surface protective film has no obvious scratches, no aluminum chips, burrs, oil spots or other dirt, adjacent components are colored without obvious color difference, there is no overflow adhesive at the assembly joint, the door and window frame size error is small, the welding place There is also no break-opening phenomenon; the hardness is sufficient, and the surface of the profile is not broken by the hammer. The inferior profile processing is shoddy, and the saw is processed by sawing. The cut surface is extremely uneven, the color is uneven, there are bubble impurities, the hardness is poor, and the hammer will be broken when hit by the hammer, even if it is pinched by hand.
Second, the steel lining installed in the profile also has a quality difference
In order to enhance the rigidity of the profile, the steel lining (reinforcing rib) needs to be filled in the cavity of the profile exceeding a certain length. The state clearly stipulates that the steel lining inside the door and window sill is not less than 1.2 cm thick, and the thickness of the good inch steel is More than 1.2 mm, and the steel lining used in inferior profiles is often not thick enough. Most of the market is 0.99 cm, and some even use recycled scrap iron, gasoline barrel or wood. But in fact, if the steel lining does not reach the standard, the profile will inevitably be deformed for a long time.
Third, the profile also has multiple chambers and a single cavity
The multi-cavity profile consists of a main cavity (mounted steel) and a number of small cavities. The insulation and drainage performance is good, and the single-cavity profile does not have the consideration of insulation and drainage.
Fourth, distinguish qualified products from glass quality
Distinguish the difference in glass from glass quality, surface smoothness, no impurity bubbles, radio scratches and fog spots, and some types of defective glass will be deformed during use, reducing its transparency, mechanical strength and thermal stability. The glass can be viewed from the side, the glass is flat, there is no color difference, and the article is seen through the glass, and the article is not deformed, which is a qualified product. Since the glass is a transparent object, the quality can be basically identified by visual inspection at the time of selection.
Five, the quality of the identification of hardware accessories
See the quality of hardware accessories, high-quality brand hardware, can better guarantee the quality of insulating glass doors and windows, such as hinges, door locks and other metal materials, the surface should be anti-corrosion treatment, such as galvanizing, chrome plating, spraying, or made of stainless steel . The hinge should adopt the design to prevent the deformation of the door and window; the door lock should use the multi-locking door lock with good anti-theft effect; the inferior hardware accessories will greatly reduce the quality of the whole door and window, the door and window switch is not free, the sealing performance is poor, and the air leakage may be leaked. Rain; if the frame is not standardized, the connection is not strong, when it encounters strong wind and external force, it will cause the glass to be squeezed or even cause the hollow glass to fall off or burst, and the consequences are very serious.
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