Aluminum foam is made by adding additives to pure aluminum or aluminum alloy, and it is made by foaming process, and it has the characteristics of metal and bubbles at the same time. It has low density, high impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and high forming accuracy. , Can carry out surface coating, suitable for various fields, especially in the transportation industry, aerospace industry and building structure industry.
Of course, in the field of metal sound barriers, aluminum foam is also tried.
We can use aluminum foam to make a series of products for metal sound barriers, such as:
1. Make highway sound barriers. Using foam aluminum sound-absorbing panels to make sound barriers for elevated roads and viaducts can effectively reduce low-frequency noise generated by cars. The thickness of the foam aluminum sound-absorbing panel is 10mm, and the back cavity is 60mm thick. The general total height is 2800mm, which is twice as effective as the sound barrier of ordinary louver sound-absorbing panels.
2. Road tunnel noise reduction requirements or fully enclosed sound barriers. A 10mm thick perforated aluminum foam sound-absorbing board is used to make the sound-absorbing and noise-reducing surrounding walls of highways and river bottom tunnels, and a 60mm-thick cavity is set at the back, which can effectively absorb the low-frequency noise generated by cars. The foamed aluminum material does not absorb moisture, and still maintains a good sound absorption and noise reduction effect, and the foamed aluminum sidewall can absorb impact kinetic energy and vibration waves to protect the inner wall of the tunnel. Foamed aluminum material does not corrode, does not burn, and is safe to use.
3. Make high-speed railway sound insulation screens. The high-speed railway sound barrier is made, the height is 2800mm, the thickness of the perforated foam aluminum sound-absorbing plate is 10mm, the air layer is set at the back with a thickness of 20mm, and the rear plate is made of galvanized steel. The inner side of the sound barrier is a bare aluminum foam surface, which can absorb sound, and the overall wall can be soundproof to achieve high-efficiency noise reduction. After the foam aluminum is wet by rain, the noise reduction function will not be reduced, the foam aluminum absorbs energy and absorbs shock, and the rivets will not loosen under the vibration of the train, which is safe for a long time.
4. Make factory sound barrier sound barrier wall. Large-scale equipment room units will generate huge noise during operation, and electromagnetic radiation will be caused due to the concentration of equipment. Aluminum foam has the characteristics of noise reduction and attenuation of electromagnetic wave radiation, which can effectively improve the surrounding and internal environment of the equipment room, and reduce noise and electromagnetic radiation pollution. Aluminum foam is used for noise reduction and electromagnetic shielding in large equipment rooms. Only one material can achieve two functions of noise reduction and electromagnetic radiation reduction, and at the same time, it can effectively prevent information interference and leakage. Aluminum foam has the characteristics of reducing noise and reducing electromagnetic wave radiation. When the frequency of electromagnetic waves is between 2.6 and 18GHZ, the electromagnetic shielding capacity of aluminum foam can reach 60-90dB; it has good sound absorption performance and high noise reduction coefficient. Divide and conquer each noise source, and the overall effect is effective.
Post time: Jan-14-2022
