With the development of the economy, aluminum profile doors and windows gradually replaced the plastic steel doors and windows, especially in the villas, hotels and high-end buildings are now more applications, so aluminum doors and windows in the end how to buy?
Aluminum windows and doors are aluminum extruded profiles for the frame, fan material as the force base material, with wood, plastic and other components of aluminum composite doors and windows and aluminum-plastic composite doors and windows, which aluminum composite doors and windows and become the mainstream of the development of the times. We can roughly identify the main aspects of windows and doors according to their raw materials, size deviation, mechanical properties, style, and price to facilitate consumers’ purchase.
Quality of raw materials
The quality of the raw materials mainly refers to the quality of aluminum profiles, the surface quality of raw materials directly affects the aesthetic appearance and safety performance of doors and windows, consumers can identify from the following aspects:
- to see whether the surface of the aluminum profile window and door frame has aluminum chips, burrs or oil stains.
2. to see whether there are white spots, black spots, uneven color or obvious color differences on the surface of aluminum window and door frame section.
3. to see if there are obvious traumas on the surface of the aluminum extrusion window and door frame, such as cracks, scratches, indentations and dents.
4. to see if there are particles on the surface but also hand touch to see if the surface is obviously uneven.
Size deviation
According to the national size standards for aluminum windows and doors, the width and height of the groove of aluminum profile for window and door frame should not exceed 2000mm ±1.0mm, the verticality of the front and side of the window and door frame should not exceed 2000mm, and the allowable deviation range should not be greater than 2.0mm, all parts of the size have a deviation range, and the smaller the size deviation, the better, beyond the specified deviation range, the aluminum windows and doors are not If the deviation exceeds the specified range, the doors and windows are not qualified.
Mechanical properties
The mechanical properties of aluminum doors and windows include the thickness, tensile strength, yield strength, hardness, oxide film thickness, etc.
① Thickness of profile: the thickness of the main stressing bar of aluminum doors is 2.0mm; the thickness of the main stressing bar of aluminum windows is 1.4mm, if it is lower than this standard, the doors and windows are unqualified products and should not be used.
② Anodized aluminum profile film thickness:
- Aluminum windows and doors’ surface anodized film thickness should be at least 10 μm.
- Consumers can use their fingernails to scratch the surface of the windows and doors.
- If the anodized film can be wiped off, the thickness of the film layer is not up to standard.
③ Strength: According to the national quality requirements for aluminum windows and doors, the tensile strength is 157N/mm 2 and the yield strength is 108N/mm 2. When purchasing, consumers can gently bend the profile by hand, and if it can be quickly restored to its original state, the strength of the window and door material is up to standard and is a qualified product.
Accessories and connections
Check whether the quality of structural parts is qualified, such as whether the hinges and screws are tightened, whether there are quality problems, whether other components are firmly connected, and whether the sealing performance is qualified.
Aluminum extrusion profile for door and window style
With the improvement of people’s quality of life, the style of aluminum profile doors and windows is also improving; according to the different functions and opening methods, it can be roughly divided into sliding, casement, top-hung and folding styles; each style has different characteristics, such as top-hung is more space-saving, can only open a little mouth, both ventilation and security
Aluminum profile door and window frame Price
The quality of windows and doors should be judged from the above aspects, including material, thickness, appearance quality, the price of high-quality windows and doors is 30% more expensive than poor quality windows and doors, poor quality windows and doors aluminum profile thickness is often below 1.2mm, its tensile strength and yield strength are not up to standard, safety performance is not guaranteed, the price is relatively cheap, consumers should be careful to choose, to know Cheap must be no good goods.