The most frequently asked professional knowledge of broken bridge doors and windows! 26 Q & A (2022 edition)
1. How is the aluminum alloy profile of doors and windows made?
It is a profile mainly composed of aluminum and some alloy elements to enhance strength and hardness. Cast aluminum alloy can be divided into aluminum silicon alloy, Aluminum copper alloy, aluminum magnesium, aluminum titanium alloy, aluminum zinc alloy and aluminum rare earth alloy according to chemical composition. Generally, the raw material alloy is aluminum ingot, and after aluminum ingot is melted into aluminum rod, it is extruded into doors and windows aluminum strip by heating. It has the characteristics of being not easy to oxidize and rust-resistant at normal temperature, but it will react with hydrogen. Although the process is relatively slow, however, in order to increase the service life, surface spraying anti-oxidation treatment is needed, and the service life of the treated aluminum alloy profiles is over 30 years.
2. What is Bridge-cutoff aluminum alloy profile? What are its advantages?
Broken Bridge profile refers to the profile which is divided into two ends in the process of processing, and the two ends are connected into a whole by PA66 nylon insulation strip in the middle to form the insulation layer, which is separated from inside and outside.
The advantage is that the internal and external colors can be chosen arbitrarily, and can be made into two colors. The appearance is beautiful and the performance is good, forming an energy-saving effect.
3. What is the difference between ordinary aluminum alloy profiles and bridge-cutoff aluminum alloy profiles?
Ordinary aluminum profiles have a single color, the whole is a conductor, and the heat transfer and heat dissipation are relatively fast; The color of broken bridge aluminum profiles is diversified, and PA66 nylon heat insulation strips are used to connect both ends to form heat insulation layers. The temperature difference between inside and outside is different, which will not transfer heat, it plays the role of heat preservation and energy saving.
4. What is the standard wall thickness of aluminum alloy door and window profile?
Aluminium windows profile outwards opening window profile wall thickness is not less than 1.8mm, in-swinging casement window profile wall thickness is not less than 1.4mm, high-rise buildings can choose to increase the thickness of the profile; Heavy sliding door profile main stress parts wall thickness is not less than 2.0mm, the thickness of the outer vertical hinged door profile is not less than 2.2mm; The thickness of the inner vertical hinged door profile is not less than 2.0mm, which is the mandatory requirement of the 2020 national standard GB/T4878-2020. A single door and window can be thickened if it exceeds 3-4 square meters, excessive columns can be added to increase its physical strength.
5. What are the advantages of aluminum alloy doors and windows? What are the surface treatments?
The advantages of aluminum alloy doors and windows are that they will not oxidize or rust, and they are firm and durable. The anti-corrosion treatment of aluminum alloy surface includes porcelain swimming, electrophoresis, powder spraying and PU wood grain spraying, among which the effect of fluorocarbon paint is relatively good, it can be combined with the profile to become a part of the profile, and it is a layer of super anti-corrosion outer layer.
6. What is system doors and windows? How did it come from?
System doors and windows originated in Europe. Through years of household use, doors and windows are designed and produced when considering the sound insulation, wind pressure resistance, water resistance, safety and energy saving effects of doors and windows.
7. What is sliding doors and windows? What is flat doors and windows? What is the hanging window? What do you mean, open the inner window? What is fixed windows?
Sliding doors and windows: two doors and windows are in the same plane, and the doors and windows can be pushed and pulled horizontally to the left and right.
Flat open doors and windows: doors and windows open forward or backward. Opening doors and windows is not in the same plane, which will occupy a certain space and open indoors or outdoors in the wall.
Upper hanging window: the lower end is fixed, the opening fan is inclined to open, and the opening is on the top.
Inside opening and falling windows: European standard is adopted, which can be opened indoors and can be naturally ventilated. Doors and windows can also be opened when people are not at home. No matter how long the high-rise service time is, there is no need to worry about hitting downstairs.
Fixed doors and windows: doors and windows that cannot be opened.
8. What are the advantages of casement window, sliding window, and inner window?
Casement window is the traditional opening method in China, referred to as national standard for short;
Sliding window is simple and does not occupy space; The introduction is generous and commonly used in China;
The inside opening and falling windows adopt European standards, and the system design allows people to ventilate naturally when they are not at home, preventing rain from entering the house, holding indoors, the thief is not easy to open, and the spring and autumn night can sleep with the window open.
9. Why choose broken bridge aluminum doors and windows for installing doors and windows?
Lighting, the key is energy saving, environmental protection, sound insulation, heat insulation, solid structure, safe use, can set off the architectural style.
10. What are the main hardware accessories of sliding window? What are the main hardware accessories of casement window? What are the main hardware accessories for inner opening and inner pouring?
Sliding window main hardware accessories: pulley, Hook Lock, Crescent lock; Casement window main hardware accessories: linkage handle, dagger, hinge, lock point, lock box, hook and eye closure lock, Heaven and Earth lock, etc; the main hardware accessories of the inner window are: linkage handle, link rod, linkage, etc.
11. Features and functions of hardware accessories?
The features of hardware accessories are: push and pull, rotate, lock, and pull, which play the role of push and pull closing.
12. What is safety glass? What is the situation of using safety glass?
That is, after the glass is treated at high temperature, the quality changes, which enhances the strength of the glass. Even if the glass is damaged, it will become a small particle, which is not easy to hurt people.
Aluminum alloy doors and windows must use safety glass under the following circumstances:
①. Broken Bridge aluminum doors and windows;
②. The area of a single glass of the window is greater than 1.5m, and the area of a single glass of the framed door is greater than 0.5 m;
③. Floor-to-ceiling windows whose bottom edge is less than 500mm from the final decoration surface;
④ frameless door and window glass;
⑤. Entrance and exit doors of public buildings, floor spring glass for doors;
⑥. Doors of kindergartens or other children's activity places;
⑦. Inclined windows and skylights;
⑧ outwards opening window of buildings with 7 floors and above.
13. What is LOW-E glass? What are its advantages?
LOW-E glass, also known as low-radiation heat reflection glass, is coated with a film on the surface of the glass to block ultraviolet rays outside. It can block outdoor high temperature in summer and keep indoor temperature in winter, which can protect human body.
14. What is hollow hundred-page glass? What material is leaf? What is the service life?
It is to install aluminum or stainless steel light blocking metal sheet in the hollow glass, which is controlled by magnetic force. It can be recycled for 20000 times for about 20 years. The advantage is that it can adjust the light at any time and is sanitary without cleaning.
15. What are the advantages and disadvantages of hollow glass, LOW-E glass and hollow hundred-page glass?
Hollow glass has good sound insulation and energy saving; LOW-E glass has energy saving and UV protection; Hollow hundred-page glass can prevent direct sunlight and increase privacy, which is convenient to use.
16. What is the function of tempered glass?
Tempered glass, also known as safety glass, has high strength and is not easy to break. Even if it is broken, it will become granular and will not form a block. It is not easy to hurt people after breaking.
17. What are thermostatic doors and windows?
Constant temperature doors and windows are made of a layer of uniform nano materials plated on the glass surface by nanotechnology technology, which ensures good visible light transmittance and has excellent solar control and thermal insulation characteristics. Without external energy, it can be adjusted according to the changes of ambient temperature, which naturally plays the role of "constant temperature" of doors and windows.
Compared with ordinary doors and windows, that is, under the same indoor and outdoor conditions, houses with constant temperature doors and windows are cooler than those without. It is 2-3 degrees cooler in summer and 2-3 degrees warmer in winter, it can effectively reduce the energy consumption of air conditioning and refrigeration by 20%-40%. Constant temperature doors and windows isolate more than 90% of ultraviolet rays, effectively delaying furniture aging.
18. What is the k value of heat transfer coefficient? What is the effect? Bridge-cutoff aluminum alloy doors and windows what is the heat transfer coefficient?
K value is the term of heat transfer. In heat transfer, K value is also called heat transfer coefficient, which was previously called overall coefficient of heat transfer. The current national standards and specifications are uniformly named as heat transfer coefficient. The smaller the heat transfer coefficient K value of the enclosure structure, or the larger the heat transfer resistance R0 value, the better the heat preservation performance.
K value is the speed of internal temperature conduction through time when testing, and the heat transfer value is obtained through time and temperature. It can test the thermal insulation performance of the window profile structure. The smaller the k value, the better the thermal insulation performance.
The heat transfer coefficient of ordinary aluminum alloy doors and windows is about 3.5-5.0;
Bridge-cutoff aluminum alloy doors and windows heat transfer coefficient is about 2.0-3.0;
The heat transfer coefficient of aluminum alloy doors and windows of the system is about 1.8-2.5.
Of course, there are also doors and windows with lower heat transfer coefficient. At present, the best value in China can be 0.77 K.
19. What is hollow glass? How many years is the warranty period? What circumstances are within the scope of warranty and what circumstances are not within the scope of warranty?
Hollow glass is to seal two or more pieces of glass with aluminum strip apart. The glass is treated with desiccant. The temperature difference between the inside and outside of the glass is different, which plays a role of heat insulation.
The national standard for the warranty period of hollow glass is 15 years; The service life is 15-20 years, and there are examples in Europe. If the glass is damaged due to improper use of human factors, it is not within the scope of warranty.
20. What is the service life of broken bridge aluminum door and window sealant?
Sealant strip is generally EPDM sealant strip, automotive grade foaming sealant, glass edge sealing sealant is silicone weather proofing sealant, and the disposable silverware set durability after curing is 15-20 years.
21. What is the processing technology of aluminum alloy sliding doors and windows and broken bridge aluminum flat doors and windows? What are the key processes in the processing process?
The production process of aluminum alloy doors and windows is similar to that of broken bridge aluminum doors and windows, because broken bridge aluminum doors and windows needs to meet more functions and the installation process is relatively complicated.
Blanking: ensure geometric size;
Waterproof: apply cross-section glue, fill waterproof adhesive, angle code + fixed piece preparation;
Set angle: stable angle code screw connection;
Accessories: Assembly of accessories;
Glass configuration: glass Assembly;
Anti-fog: add argon;
Debugging: debug whether it can be installed and used normally, whether there are errors, and the appearance check is complete without scratches.
22. In order to ensure the product quality of doors and windows, how do we control and inspect during the production process?
Material inspection, production document inspection, production process self-inspection, process control inspection, debugging inspection, final qualified inspection.
23. In order to ensure the product quality of doors and windows during transportation, how is it packaged?
The aluminum frame is wrapped with foam cotton, wrapped with semi-adhesive plastic tape, wooden frame with corners, and wooden frame with hollow glass for packaging; So that the profiles and profiles will not be directly ruffled when loaded and stacked.
24. After the installation is completed, how can I ask the owner for acceptance? Which projects are specifically accepted?
After the installation is completed, the person in charge of installation invites the owner to check and accept each door and window;
Acceptance items: the appearance of doors and windows, whether the glass is damaged or not, whether the opening is flexible, and how to use and follow-up calls.
25. What is the process of doors and windows from the customer's intention to order to after-sales service? What should we pay attention?
① measure the size after paying the deposit in advance;
② measurement size, drawing, calculation area and total price shall be determined by the owner;
③ After confirming the total price, how much deposit should be paid in advance, when to install it on site, and how much payment should be paid before installation?
④ After the installation is completed, the owner is requested to check and accept, and the selection of doors and windows should be equipped according to the owner's requirements.
26. How long is the warranty period for doors and windows? What circumstances are within the scope of the warranty, and what circumstances are not within the scope of the warranty?
The national standard for the warranty period of doors and windows is two years, and the damage caused by human factors is not within the warranty period.
