How to efficiently identify the quality of doors and windows?

1. Identification of signs.

Manufacturers with regular or production licenses shall indicate the marks of the products in the conspicuous parts of their aluminum alloy products, including: the name of the manufacturer or trademark, the product name, the product model or mark, and the date or number of manufacture. The packing box should have obvious words and signs of "moisture-proof", "handle with care" and "up".

Second, the surface quality.

The quality of the door surface directly affects the decorative effect of the entire wall after installation. The following aspects should be paid attention to when inspecting the surface quality of the door:

a. There should be no obvious damage to the surface of the door decoration, which means that the protective film on the surface of the door and window should not have traces of abrasion and scratches.

b. There should be no obvious color difference on the coloring surface of adjacent components on the door.

c. There should be no aluminum chips, burrs, oil spots or other stains on the surface of the door, and there should be no spilled adhesive at the assembly joint.

d. The flatness of the adjacent components (horizontal and vertical) of the door and the rules of the composition angle.

e. Whether the door glass sealant is uniform and smooth, and there is no leakage or breakpoint to ensure the sealing effect. (Of course, there are also some sealant strips for sealing, which depends on the quality of the material of the strip, and the current anti-aging and sealing effect is better EPDM strip).

f. Door and window glass is a key component. The quality of glass largely determines the quality of doors and windows. Intuitively, of course, there are no cracks, scratches, bubbles and other defects, which can be seen with the naked eye from the front, and at the same time from the side through the reflection effect of the glass.

If the insulating glass, it is necessary to also pay attention to whether the hollow spacer is intact (this is usually not easy to see with the naked eye, but it can be detected by a small test, or it can be seen when the weather changes, especially when the temperature difference between indoor and outdoor is large, when the sealing spacer is damaged, fog will be formed in the hollow cavity, and the larger the temperature difference between inside and outside, the more obvious).

3. Dimensional deviation.

Under normal circumstances, the manufacturer will have construction drawings, and users can take their own measuring tools to measure and compare.

Fourth, aluminum alloy door components.

The connection of aluminum alloy door components should be firm, and corrosion-resistant filling materials need to be used to make the connecting part sealed and waterproof.

Fifth, look at the material.

There are 6 main aspects that can be referred to in terms of materials and materials:

1. Thickness: There are two kinds of aluminum alloy sliding doors: 70 series and 90 series, and 70 series can be used for aluminum alloy sliding doors inside the residence. The number of series represents the number of millimeters of the thickness of the door frame construction size.

2.Strength: The tensile strength should reach 157 Newtons per square meter and the yield strength should reach 108 Newtons per square millimeter. When purchasing, you can use your hands to bend the profile moderately, and you should be able to restore it after letting go.

3.Chromaticity: The color of the same aluminum alloy profile should be consistent, if the color difference is obvious, it is not suitable to buy.

4.Flatness: Check the surface of the aluminum alloy profile, there should be no depression or bulge.

5.Gloss: Aluminum alloy doors avoid buying profiles with open bubbles (white spots) and ash slag (black spots) on the surface, as well as obvious defects such as cracks, burrs, and peeling.

6.Oxidation: The thickness of the oxide film should reach 10 microns. When purchasing, you can scratch the surface of the profile to see if the oxide film on the surface can be wiped off.

First, look at the materials.

The aluminum profiles used in high-quality aluminum alloy doors and windows, the thickness, strength and oxide film, etc., should meet the relevant national standards, the wall thickness should be more than millimeters, the tensile strength should reach 157 Newtons per square meter, the yield strength should reach 108 Newtons per square millimeter, and the thickness of the oxide film should reach 10 microns. If it does not meet the above standards, it is inferior aluminum alloy doors and windows and cannot be used.

Second, look at the processing.

High-quality aluminum alloy doors and windows, fine processing, exquisite installation, good sealing performance, free switching. Inferior aluminum alloy doors and windows, blind selection of aluminum profile series and specifications, rough processing, sawing instead of milling, not according to the requirements of installation, poor sealing performance, switch is not free, not only leakage and rain leakage and glass bursting, but also encounter strong wind and external force, easy to push and pull part or glass scrape or bump down, destroy and hurt people.

3. Look**.

In general, high-quality aluminum alloy doors and windows are about 30% higher than low-quality aluminum alloy doors and windows due to high production costs. Some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only millimeters have tensile strength and yield strength that are much lower than those stipulated in the relevant national standards, and are very unsafe to use. In addition, at present, there are many self-employed people who process aluminum alloy doors and windows, and they do not understand the structural characteristics and performance of aluminum alloy doors and windows.

In order to reduce costs, cut corners, shoddy, the hidden dangers of the product are larger, and it is generally not suitable to use. It is best to choose the products of regular aluminum alloy door and window manufacturers.

1. Look at the quality This is everyone's primary concern, and it is also the first aspect to understand when choosing broken bridge aluminum doors and windows. The aspect commonly used by the people is to touch it with their hands, to feel the approximate thickness, to feel how the surface is made, in fact, to come out of this method, there is.

Just look, intuitive feelings can sometimes judge good or bad. If you look carefully, you will obviously find that the surface of high-quality broken bridge aluminum doors and windows is shiny, and at the same time there is texture, which gives you a comfortable visual feeling; Inferior.

The surface of the broken bridge aluminum doors and windows is rough and dull, and it feels unnatural, and after a period of use, it will change color or fade.

2. Look at the section structure of the profile.

When we go to buy doors and windows, the buyer will show the customer some small doors and windows in the corners, at this time, we can judge the quality according to the profile section structure. The collection angle of the high-quality profile section is accurate, should not be bent, the stability is high, and the angle is correct, while the section structure of the inferior profile is not very stable. Buy the good Baoding broken bridge aluminum doors and windows to Baoding Xinyuan doors and windows.

3. Look at the insulation strip.

With the development of door and window technology, the thermal insulation strip is also constantly developing, now divided into domestic and imported, the domestic is generally plastic PVC material, and the imported is nylon thermal insulation strip, the general high-quality broken bridge aluminum doors and windows are imported nylon thermal insulation strip, its own high temperature resistance and low temperature resistance is good, but also environmental protection and energy saving.

The advantages and disadvantages of system doors and windows are mainly based on the "five characteristics" of doors and windows, namely heat insulation, sound insulation, air tightness, water tightness, and wind pressure resistance.

The main performance of doors and windows is poor, and the quality of windows will not be good, because the performance of doors and windows is an organic combination of various parts of doors and windows, and each performance is also complementary to each other, and the quality of one performance will also affect other performance.

Doors and windows with good performance are the perfect combination of profiles, glass, rubber strips, hardware and other high-quality accessories.

Look at the profile quality of plastic steel doors and windows. The appearance of the profile should be observed, and attention should be paid to whether the profile color of the frame and the fan that make up the doors and windows is consistent and whether the appearance is uniform. Secondly, look at the clearance and sealing of doors and windows, see whether the matching gap between various profiles is tight, whether the incision at the fit is flat, and the height difference at the lap of the profile.

The quality of hardware also has a certain impact on the life of doors and windows, the hardware used should look thick, and the surface gloss should be good, the protective layer is dense, there is no scratch, the most important point is that the opening should be flexible.

Specifically, it is divided into: 1. Look at the surface quality of the profile.

The quality of the profile can be observed from the surface of the broken bridge aluminum profile, the surface of the good broken bridge aluminum profile is glossy and textured, and the surface spraying color treatment will also be natural, and the look feels smooth; The surface of the broken bridge aluminum doors and windows is rough, there is no luster, and it looks unnatural.

Second, look at the profile section structure.

The geometric angle of the cut surface of the good broken bridge aluminum door and window profile is accurate, and the profile will not be bent and twisted, and the angle is correct. Moreover, the thickness of the cut surface is sufficient, such as the 60 model of broken bridge aluminum doors and windows customized by you, 60 refers to the thickness of the profile is 6 cm, and these 6 cm are full of broken bridge aluminum material, and the proportion of wear strips is small; The less broken bridge aluminum doors and windows will use the 60 profile of the virtual brace, and the thickness will be supported by the strip, and the aluminum material is relatively less.

3. Look at the heat insulation strip of the profile.

Thermal insulation strips are divided into imported and domestic, most of the domestic thermal insulation strips are plastic PVC materials, and imported thermal insulation strips are polyamide, that is, nylon thermal insulation strips. Good quality broken bridge aluminum doors and windows, the use of imported heat insulation strips, its high temperature resistance and low temperature resistance are better, the heat conduction value is low, and it can achieve the effect of heat insulation, environmental protection and energy saving, which can save energy by 20%-30%.

Fourth, a good horse with a good saddle - a good broken bridge aluminum doors and windows must be equipped with good hardware accessories.

The above three points teach you how to distinguish the quality of broken bridge aluminum profiles, so if you really want a good broken bridge aluminum doors and windows, you must match good hardware accessories. As the saying goes, "a good horse with a good saddle", "people rely on clothes and horses rely on the saddle", in order to ensure that the quality of the broken bridge aluminum profile is no problem, the finished products of the broken bridge aluminum doors and windows must be matched well.

5. Gold fittings.

The quality of the accessories determines the flexibility and service life of the doors and windows, and good hardware accessories can ensure that the broken bridge aluminum doors and windows open flexibly, seal intact and will not sink after a long time, and the problem of not closing tightly.

Hello, I personally think that judging a door and window *** is bad, mainly depends on these points:

1. Look at the thickness.

The greater the thickness of the aluminum profile, the higher its firmness does not need to be said, correspondingly, the mute effect of its doors and windows will be better. When you buy, you can test the thickness through the cutting surface of the aluminum profile.

2. Hardware accessories.

Windows and doors need to be opened frequently, so they open easily and smoothly to make people comfortable and noiseless. Fuxuan door and window products make the direction and slide smoothly through the anti-swing positioning wheel, which effectively prevents the door from swinging when pushing and pulling, has stronger wind pressure resistance, and has almost no noise.

3. Tightness.

The well-made aluminum alloy doors and windows are smooth in addition to the splicing of aluminum profiles, and the glass glue must also be smooth. Fuxuan door and window seals are made of EPDM, which is resistant to aging and ensures a long time.

4. Double-glazed glass.

As an important part of silent doors and windows, glass has a great impact on doors and windows. Choose tempered insulating glass with 3C certification, in addition to superior sound and heat insulation performance; In terms of safety, the explosion will not be scratched after shattering.

First, look at the window frame profile.

Nowadays, people buy doors and windows, and the most popular is the system doors and windows. The system doors and windows include all the advantages of plastic steel windows, wood windows and aluminum alloy windows in the past, which not only have high lightness and high toughness, but also corrosion resistance, wear resistance, not easy to deform, and durability.

When choosing broken bridge aluminum doors and windows, pay attention to the wall thickness of the door and window profiles. The international standard is not less than, but the thickness of inferior door and window profiles may only be to the millimeter. In addition, before buying doors and windows, you should also pay attention to the surface of the profile, and good doors and windows should not have obvious damage, aluminum chips, burrs, oil spots or other stains.

Second, look at the door and window glass.

Door and window glass occupy the largest position of a whole window, so the choice of glass is particularly important. When choosing doors and windows, it is not recommended to have ordinary glass, which has poor compressive resistance, cannot withstand impact, is easy to break, and is prone to safety accidents. Therefore, tempered glass is more secure.

If there is a requirement for thermal insulation, choose insulating glass. If there is a requirement for sound insulation, choose laminated glass. Tempered glass must be identified with the 3C certification mark.

3. Look at the door and window hardware.

Although the hardware is inconspicuous, it is the heart of the doors and windows, which not only affects the performance of the doors and windows, but also determines the service life of the doors and windows. Doors and windows must be equipped with high-quality hardware, otherwise inferior hardware may begin to rust and damage after one or two years, resulting in unsmooth opening of doors and windows or even falling off, resulting in safety accidents.

Fourth, look at the processing technology.

The quality of doors and windows is mainly reflected in whether the production process is fine. High-quality doors and windows will find that it is finely processed, smooth tangential, precise angle, and exquisite installation, and there will be no obvious gaps or poor opening and closing. Those doors and windows that have large gaps, door frame corners and other positions that cannot be spliced and flat, are shoddy and cannot be used.

Not only is there a hidden danger of rain leakage on rainy days, but also because of the arrival of a typhoon, the entire door and window cannot withstand the toss and be blown away or the glass is blown away. When choosing doors and windows, we must be optimistic about the door and window process produced by the manufacturer.

Fifth, look at the brand of doors and windows.

When buying doors and windows, we should try to choose a brand with a good market reputation and a perfect after-sales system. Choosing a brand can have a certain guarantee in all aspects. It is very not recommended to go to those doorside shops on the side of the road to buy doors and windows, not only the quality and process are prone to problems, but the most worrying thing is that it is very difficult to protect rights after sale.

In short, doors and windows, as an indispensable part of the home, always guard the safety of the room. We can't just buy doors and windows for cheapness and not look at the quality, doors and windows need to experience the wind, sun, and rain for a long time, and a good door and window can be used for decades without deformation.