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When buying aluminum alloy doors and windows, how to judge the quality of the quality?

Update:05-07-2019
Summary:

In today's society, the market for aluminum alloy doors […]

In today's society, the market for aluminum alloy doors and windows is getting bigger and bigger. Nowadays, many buildings and decoration use aluminum alloy doors and windows, so learning to judge the quality of aluminum alloy materials has become a necessary skill for consumers. To judge the advantages and disadvantages of aluminum alloy doors and windows, Yuqi pulley small series today to compare the brand doors and windows to illustrate:
Purchase attention, identification of signs
Many aluminum alloy doors and windows indicate the product's logo on the obvious parts of its aluminum alloy products, including: manufacturer's name or trademark, QR code, product name, product model or mark, date of manufacture or serial number.
There should be obvious "moisture-proof", "careful and light" and "upward" words and signs on the package.
Purchase attention 2, surface quality
1. The surface of the aluminum alloy door and window decoration will not have obvious damage, and the surface protective film will not show any scratches and scratches.
2. The colored surface of adjacent components on aluminum alloy doors and windows will not have obvious chromatic aberration.
3. Aluminum alloy doors and windows will not have aluminum chips, burrs, oil spots or other stains on the surface, and there will be no spilled adhesive at the joints.
Purchase attention three, size deviation
The dimensional deviation of aluminum alloy door and window frames has been far less than the national standard.
Purchase attention four, aluminum alloy door and window components
The aluminum alloy door and window members are firm connected, and the connecting portion is sealed and waterproofed with a corrosion-resistant filling material.
Buy attention to five, see the material
Aluminum alloy doors and windows are mainly seen in the following 6 points on the materials used.
From the aspects of thickness, strength, chroma, flatness, gloss, and oxidation.

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