[China Aluminum Industry Network] 1. National Security Requirements 1. Submarine Muffler and Destroyer Demand for Missile Demands A sound-absorbing box composed of a foamed aluminum sound-absorbing panel and the cavity behind it is installed in the engine room of the submarine and can reduce noise by more than 20 dB. , is conducive to the manufacture of silent submarines.
Other ships such as guided missile destroyers also need to use foam aluminum sound-absorbing panels to reduce noise in the engine room and make partition walls.
2. Production of Composite Armor Requirements The new type of composite armor consists of a ceramic sheet/foamed aluminum/aramid fiber sheet. A 20 mm thick foamed aluminum material is set in the middle or inner layer. The force of the foamed aluminum is used to make the armor-piercing and armor-piercing forces. Disperse and prevent it from entering the interior.
3, the production of vehicle anti-landmine floor tanks, armored vehicles, heavy trucks and other bottom with V-shaped, external armor plate, the middle layer of foam aluminum, the inner layer of Kevlar fiber plate or steel, anti-mine.
4. Requirements of Military Command Vehicles and Command Posts Foam aluminum materials have the function of shielding electromagnetic waves and can shield more than 90 decibels to make the inner lining of military command vehicles and command posts, keeping the information confidential.
5, the production of anti-riot vehicles demand the use of foam aluminum material to make anti-riot vehicles, composite armor, anti-riot vehicles can reduce the weight of more than one-third.
6. Making military airdrop crates At present, China's military airdrop crates are manufactured using Harding technology of the United States. The internal energy-absorbing and shock-absorbing materials are high-density plastic foams, and the foamed aluminum is used as internal energy-absorbing and shock-absorbing materials, and the energy-absorbing and shock-absorbing capacity is improved. More than doubled, that is, the safety of airdropped armed equipment and ammunition increased by more than 10 times.
7. Ship-board explosion-proof deck Ship deck deck/foam aluminum sheet/steel composite structure, deck strength more than 2 times, anti-knock and anti-ballistic ability more than 2 times.
Second, rail transportation needs 1, the production of subway station sound-absorbing lining with perforated foam aluminum sound-absorbing panels to make the subway station side wall and top sound-absorbing panels, thickness of 10mm, behind the setting of 20mm thick cavity, even in the subway station The sound absorption and noise reduction effect is still maintained in a humid environment, and the noise reduction effect is more than double that of using other sound absorption materials.
2. Produce high-speed railway noise barriers to produce high-speed railway sound barriers with a height of 2800mm, perforated foam aluminum sound-absorbing panels with a thickness of 10mm, a 20mm thick air layer behind, and a galvanized steel backplate. The inner side of the sound barrier is a bare aluminum foam surface that can absorb sound and the entire wall can be sound-insulated to achieve high-efficiency noise reduction. After the foamed aluminum is wetted by rain, the noise reduction function is not reduced. The foamed aluminum absorbs shock and absorbs shock. Under the vibration of the train, the rivets will not loosen and the safety will be long-term.
3, the production of ordinary train floor train aluminum foam floor 1mm aluminum / 15 ~ 20mm foam aluminum /1mm aluminum sandwich panel composition, aluminum foam density of about 0.5g/cm3. Has excellent sound insulation, vibration isolation, non-combustion, good fire performance, bending strength of about 20Mpa, service life of up to 30 years. Lightweight, about 1/2 the weight of the board.
4, the production of high-speed trains for high-speed train floor foam aluminum floor with 1mm aluminum / 25 ~ 30mm foam aluminum /1mm aluminum sandwich panels, aluminum foam density of about 0.5g/cm3. More than 20 decibels of sound insulation, vibration reduction of an order of magnitude, fire, corrosion resistance, bending strength of about 20Mpa, do not collapse, the service life of up to 30 years.
5, the production of train door sandwich using foam aluminum door sandwich material, with excellent sound insulation, seismic isolation, thermal insulation, load bearing capacity, isotropic.
6, the production of carriages lined with subway cars using 20mm thick foam aluminum liner, can reduce noise more than 20 decibels.
The side lining of large-line trains, high-speed trains, and urban rail trains adopts 20mm foamed aluminum plate/20mm polyurethane foam composite board, which has excellent dual heat insulation and sound insulation capabilities.
7. The compartment wall of the passenger compartment is made of foam aluminum plate to make the passenger compartment partition wall. The noise isolation function is good, the strength in each direction is the same, the strength is good, and no bird sound is produced.
8. Fabricate foam aluminum sandwich panels for electrical cabinets (0.5mm aluminum panels/5 to 10mm foam aluminum panels/0.5mm aluminum panels) Make electrical cabinets that generate noise and electromagnetic wave equipment such as generators, motors, frequency converters, and central air conditioners, which can reduce noise Above 20 decibels, shielding electromagnetic waves above 90 decibels.
9. To make a subway tunnel vent muffler made of foam aluminum sound-absorbing panels made of sound-absorbing grating, which can effectively reduce the noise of the tunnel vents.
Aluminum Foam III. Requirements for Construction 1. Production of foam aluminum sound-absorbing panels (thickness: 10mm) for sound-absorbing lining of buildings. Production of recording studios, dubbing rooms, concert halls, conference halls, sports stadiums, etc. to avoid noise reverberation. Lining, behind the foam aluminum sound-absorbing panel set 20-40mm thickness cavity, noise noise reduction effect is good.
2. The sound-absorbing wall of the production swimming pool Because the humidity in the swimming pool is very large, the sound-absorbing capacity is greatly reduced after ordinary sound-absorbing materials absorb water. Noise reduction in swimming pools has long been a difficult problem for the construction community. The perforated foam aluminum sound-absorbing board has a high sound-absorbing rate, and in a humid environment, the sound-absorbing rate does not decrease and the noise-reduction effect is good. The foam aluminum sound absorption board has a thickness of 10mm, and a 20mm thick cavity is arranged behind it.
3, the production of high-rise aluminum / foam aluminum / aluminum curtain wall panels for the production of high-rise building curtain wall panels, foam aluminum thickness of 10mm, panel 0.5mm thick fluorocarbon aluminum paint, the stiffness of more than 15Mpa. Energy absorption, sound insulation, heat insulation and other excellent performance, the same as the thermal expansion coefficient inside and outside, to ensure the formation of flat, non-flammable, good fire performance.
4. The production of marble/foam aluminum curtain wall panels with 3mm thick marble/15mm thick foamed aluminum panels will reduce the weight of solid marble panels by 2/3 and increase the impact toughness by more than 2 times.
5. The sound insulation of sound insulation floor construction is a difficult problem. It adopts a 5mm thick wood board and a 10-15mm thick foam aluminum composite floor, and the floor sounds are separated by more than 20 decibels.
6. The interior decoration of entertainment places uses foam aluminum sound-absorbing panels to produce sound-absorbing decorations for ceilings and wall surfaces in entertainment venues such as karaoke bars and nightclubs, with good noise-reduction effects, non-burning, and good fireproof performance.
Fourth, the traffic needs 1, the production of road sound barrier with foam aluminum sound-absorbing panels to make elevated road, viaduct sound barrier, can effectively reduce the low-frequency noise generated by the car. The thickness of foam aluminum sound-absorbing board is 10mm, and a 60mm thick cavity is set behind it. The general total height is 2800mm, which is twice as much as the noise reduction effect of ordinary louver sound-absorbing board sound barrier.
2. Demand for road tunnel noise reduction The 10mm thick perforated foamed aluminum sound-absorbing board is used to produce sound-absorbing and noise-reducing walls for roads and river tunnels, and a 60mm thick cavity is set behind it to effectively absorb low-frequency noise generated by automobiles. The foamed aluminum material does not absorb moisture and still maintain a good sound absorption and noise reduction effect, and the foamed aluminum side wall can absorb impact kinetic energy and vibration waves to protect the inner wall of the tunnel. Aluminum foam material is not corrosive, does not burn, and is safe to use.
3. Demand for noise reduction of submarine tunnels A 10 mm thick perforated foamed aluminum sound-absorbing panel is used to make noise-absorbing and noise-reducing walls in river tunnels, and a 60 mm-thick cavity is set behind the tunnel. The humidity in the submarine tunnel is large, and the foamed aluminum material does not absorb moisture and still maintain a good effect of sound absorption and noise reduction. The foamed aluminum side wall can absorb the impact kinetic energy and vibration waves to protect the inner wall of the tunnel. The surface of foam aluminum sound-absorbing board is nickel-plated and spray-coated to resist seawater corrosion.
V. Demands of the automotive industry 1. Production of car bumpers Foamed aluminum is used as a sandwich to produce car bumpers. It has the function of absorbing impact kinetic energy. The thickness of the foamed aluminum core is generally 20mm, the density is about 0.6g/cm3, and foam aluminum. Made of deformed aluminum alloy. This bumper represents the world's overall development trend. The Audi A8 is already in use. Companies such as BMW, Mercedes-Benz and Honda are also developing applications.
2. Produce car floor, door sandwich, etc. Use foam aluminum material to make car floor, interval, door sandwich, etc., to achieve the effect of sound insulation and shock isolation.
3, production of large car floor and other foam aluminum material used to produce car floor, lining, door sandwich, sound insulation, vibration isolation effect is good, light weight, thermal insulation, corrosion resistance, long service life, non-combustion, fire performance is good.
4, the production of muffler foam aluminum sound-absorbing panels for the production of trucks, passenger cars and car muffler, foam aluminum sound-absorbing board after fire treatment, can be applied to the exhaust temperature of 500 ~ 600 °C. The noise reduction effect is 2-3 times of the expansion impedance type noise elimination core and the parallel resonance type noise reduction inner core muffler, and the weight is reduced by about 1/3.
5. Fabrication of foam-filled aluminum profiles Body made of aluminum foam filled with aluminum has been used to make automotive bodies that have more than a two-fold increase in stiffness and a three-fold increase in damping and anticollision capability.
6, the production of aluminum / foam aluminum / aluminum sandwich panel car roof sandwich panel thickness of about 2mm, stiffness for the steel plate 7 times the weight, weight reduction of more than 50%.
7. Production of commercial vehicle bed and car body 10mm thick foam aluminum sandwich plate is used to make commercial vehicle bottom plate and car body, which can reduce the weight by more than 50% compared with the steel plate, increase the strength by more than 3 times, and resist corrosion.
Sixth, the shipbuilding industry demand 1, ordinary tugboats, cargo ship engine room noise reduction needs foam aluminum sound-absorbing panels make the engine room acoustical lining, foam aluminum sound absorption board thickness of 10mm, the cavity behind it is 30 ~ 60mm, can be reduced Noise more than 20 decibels.
2. The construction of passenger ships, mixed vessels, and luxury ship structures requires the use of foam aluminum sandwich panels for the production of passenger ships, mixed vessels, yacht cabins, bays, hatches, floors, etc. The density is 1/20 of steel, lightweight and energy-saving. The floor is 1mm thick aluminum plate / 20mm foam aluminum plate / 1mm thick aluminum plate structure, strength is 7 times the steel plate, the weight reduction of more than 50%; partition walls and doors can be used 0.5mm thick aluminum plate / 10mm thick foam aluminum / 0.5mm Made of thick aluminum sandwich board, the strength is more than 3 times that of steel plate, sound insulation, comfort, no burning, corrosion resistance.
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