Structural diagram of aluminum-plastic * * * Extruded profile Features of aluminum-plastic * * * Extruded profile: aluminum alloy profile is used as the skeleton to ensure the rigidity and strength of the profile. The corner of the window is connected by angle code, which further improves the wind pressure resistance and deformation resistance of the window.
We invented the dovetail groove structure (patent has been applied) on the aluminum liner for composite extrusion. The purpose of designing the dovetail groove structure is to increase the inertia moment (in the direction of wind pressure resistance and deformation resistance) of the aluminum liner by about 2% at the maximum under the condition of a small increase in the weight of the aluminum liner, which is a very great progress, that is to say, compared with the ordinary aluminum alloy structure (without dovetail groove structure). The concrete comparison is as follows:
There is no dovetail groove structure in the aluminum lining in the drawing, and the inertia moment Iy=7776
The inertia moment Iy=86319
The inertia moment is increased by 11%
The aluminum lining in the drawing is dovetail groove structure. Moment of inertia Iy=76189
The aluminum lining in the drawing has no dovetail groove structure. Moment of inertia Iy=6686
Moment of inertia has increased by 25%
According to the above calculation, the aluminum lining for aluminum-plastic extrusion can be designed flexibly to meet the requirements of wind pressure resistance of window profiles and save materials. According to the structure of aluminum-plastic extruded profile, it can be seen that the surface of aluminum liner is covered with a layer of foamed plastic with a thickness of more than 4mm as the thermal insulation layer. As we all know, the best material for thermal insulation and sound insulation is foamed material. Therefore, we use the latest international hard skin micro-foaming technology to evenly foam and cover the heated plastic on the aluminum liner through the die when the aluminum liner is extruded, forming a foamed insulation layer with uniform foam holes, appropriate density and good combination. The unique mold structure and formula (imported from Germany) are used to form a hard plastic layer with a thickness of more than .5mm on the plastic surface, and this hard plastic layer completely and evenly covers the foamed plastic layer, so as to ensure the appearance of the profile to be hard and smooth, and achieve the same hardness and surface requirements as hard plastic windows.
the thermal conductivity of different materials is shown in the following table: specific gravity (kg/M) and thermal conductivity (W/m). K) steel lining 78 5 aluminum alloy 28 16 rigid PVC 139 .17 glass fiber nylon 145 .3 foamed PVC 75 .1 W: power m: length k: absolute temperature
The greater the numerical value, the greater the thermal conductivity
As can be seen from the above table, the thermal conductivity of rigid PVC is 1.7 times higher than that of foamed PVC, which means that the thermal insulation of 3.5mm foamed plastic is equivalent to 3.5.
The thermal conductivity of glass fiber reinforced nylon for broken bridge aluminum alloy is 3. times higher than that of foamed PVC. 3.1 Aluminum-plastic * * * Description of extruded 6-meter-weight plastic aluminum alloy 6-meter-weight open frame 1.51 .83 .68-meter-weight open fan 1.53 .87 .66-meter-wide open stile 1.58 .94 .64 Aluminum-plastic * * * Extruded doors and windows per square meter: aluminum lining 3.17kg, Plastic 5.kg
3.2 Description of 2.5mm6 flat plastic profile conforming to the national standard Metre heavy plastic steel lining (1.5mm) 6 flat open frame 2.11 1.9 1.2 6 flat open fan 2.4 1.17 .87 6 flat open stile 2.31 1.14 1.17 Calculated by 1.5×1.8 m window type: steel 4.8kg per square meter, Plastic 6.5kg
3.3 Description of broken bridge aluminum alloy 6 casement window profile Meter weight aluminum alloy 6 casement 1.22 6 casement 1.36 6 casement 1.44 Calculated by 1.5× 1.8m window type, broken bridge aluminum doors and windows are used per square meter: aluminum 7.67kg
aluminum-plastic * * extruded doors and windows integrate aluminum alloy doors and windows with plastic doors and windows, and plastic is more than plastic windows per square meter. According to the national standard GB/T2589-28 "General Principles for Comprehensive Energy Consumption Calculation", the calorific value per kilogram of standard coal is 29,271 kilojoules (that is, 7, kcal).
according to the calculation method of carbon emissions in China Energy Conservation Industry Network, .4kg of standard coal (1kW) is saved, .272kg of dust, .997kg of carbon dioxide and .3kg of sulfur dioxide are reduced, .15kg of nitrogen oxides
plastic steel window (energy consumption per square meter for profile and steel lining production)
total: 176kg of standard coal /m2 (meanwhile, it is known that steel is a high energy consumption industry)
broken bridge aluminum window
total: 152kg of standard coal /m2 (meanwhile, it is known that aluminum is a high energy consumption industry)
aluminum-plastic * * extrusion. Only 75% of broken bridge aluminum. Taking the annual assembly of 1, square meters as an example, it is equivalent to saving 37 tons of standard coal, which can reduce the emission of 251.6 tons of dust, 922 tons of carbon dioxide, 27.75 tons of sulfur dioxide and 13.88 tons of nitrogen oxides. 5.1 How are the corners of doors and windows connected? < P > Usually, the corners of aluminum-plastic extruded doors and windows are connected by 45 degrees. First, cut the profile ends into 45 angles with a special cutting saw, and then insert a special angle code (aluminum parts, which have been standardized) into the aluminum lining cavities of two profile ends to be connected. Put it into an improved welding machine to weld and shape the plastic. Put the welded connected profile on the platform, and connect the profile and the corner code into a whole by screws to realize the corner assembly process (as shown in the figure), so as to achieve the purpose of completely sealing the corner plastic and completely connecting the aluminum parts with the aluminum lining of the profile, so that the window formed by the profile shows high strength, high wind pressure resistance, good overall rigidity, no deformation, no sagging, good sealing and easy realization of building lightning protection, which is beneficial to fire emergency
5.2 How to make the window? Cut the center material into straight material (9) with a cutting saw according to the required size, then use a special center milling machine (this is a special equipment mainly added) to process the end into steps according to the required shape and size of the end face, so that the end is slotted with the corresponding frame material (as shown in the figure), and then connect the center material with the frame material with a special connector (aluminum parts, which have been standardized in production) through screws.
6.1 The quality of the profile is guaranteed
The production process of aluminum-plastic * * * extrusion profile determines that the profile completely and tightly combines the aluminum lining and the plastic into a whole when it leaves the factory, and the profile is directly assembled into a window after cutting, instead of adding a reinforcing lining at the assembly site, which ensures that the produced doors and windows have aluminum lining that plays a reinforcing role. The assembly plant is prevented from cutting corners.
6.2 The window forming performance is guaranteed
6.2.1 The corner and the middle stile of ordinary plastic window are only welded together with plastic parts, but the steel linings are not connected, while the corner and the middle stile of aluminum-plastic extruded profiles are all connected together with aluminum alloy ingredients. It ensures the safe and reliable connection between the corner and the middle stile, high strength and good overall rigidity of the window. It prevents the common plastic window from being distorted and deformed at the window edge, poor window closure, difficult opening and closing, deformation and sagging after a period of use.
6.2.2 Solutions to prevent different expansion coefficients
As we know, aluminum-plastic extruded profiles are made of aluminum and plastic, because the linear expansion coefficients of the two materials are different. When the temperature is lowered, the change of the plastic part is larger than that of the aluminum alloy part, that is to say, the aluminum alloy will protrude from the plastic. The following process is adopted to solve this problem during assembly. Before assembly, use a drilling and milling machine (which is also a special equipment for assembling aluminum-plastic profiles) to mill off a part of the aluminum lining outside the end of the profile, leaving the plastic layer covered by the outer layer, which is also used for plastic welding. This will not affect the corner strength, because the corner connection uses aluminum corner codes.
the linear expansion coefficient of aluminum liner is 2.35× 1m/℃
the linear expansion coefficient of PVC is 8.3×1m/℃
when the temperature changes by 7℃ (i.e. -2℃-+5℃), The variation difference between two different materials is calculated for 2m free long bar < P > △ E = [(8.3× 1m/℃× 2m)-(2.35× 1m/℃× 2m) ]× 7℃ = 8.33mm < P > In theory, the shrinkage difference is 4.2mm/ m in the most unfavorable case. In practice, due to the aluminum lining,
During assembly, the angle code part is fixed by screw connection, and the middle mullion connector is also fixed by screw connection. In fact, the shrinkage of 2m long profile is cut into less profile length, which further reduces the shrinkage. Long-term production practice has proved that the actual shrinkage of 6m long profile is at the maximum of 8mm, that is, 1.35mm/m
6.2.3 to prevent the delamination of plastic and aluminum alloy:
A dovetail groove is formed on the surface of aluminum lining (national patent has been applied), and foamed plastic enters the dovetail groove of aluminum lining during production, just like the tenon structure adopted by ancient wooden furniture in China, which makes the plastic and aluminum lining closely integrated. The aluminum alloy dovetail groove tightly pulls the coated plastic layer, thus ensuring that the two materials will not separate.