First. National security requirements
1. Submarine silencer and missile destroyer need to reduce noise. The sound-absorbing box composed of foam aluminum sound-absorbing board and its back cavity is installed in the inner engine room of the submarine, which can reduce noise by more than 20 decibels, which 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, the production of composite armor needs
The new composite armor is composed of ceramic sheet, aluminum foam and aramid fiber board. 20mm thick foam aluminum material is placed in the middle or inner layer. The energy absorption of foam aluminum is used to disperse the armor-piercing projectile and the armor-piercing projectile to prevent it from entering the interior. .
3. Making vehicle anti-mine floor
Tanks, armored vehicles, heavy trucks, etc. are V-shaped at the bottom, the exterior is an armor plate, the middle layer is foam aluminum, and the inner layer is aramid fiberboard or steel plate, anti-mine.
4. Demands of military command vehicles and command posts
The foamed aluminum material has the function of shielding electromagnetic waves, and can shield more than 90 decibels to make the inner lining of the military command vehicle and the command post, so that the electrical information is kept secret.
5, the production of anti-riot vehicle demand
The composite armor of the anti-riot vehicle is made of aluminum foam material, and the weight of the anti-riot vehicle can be reduced by more than one third.
6, making military airdrop packaging boxes
At present, China's military airdrop packaging box is made by American Harding technology. The internal energy absorbing material is high-density plastic foam. The foam aluminum is used as the internal energy absorbing material. The energy absorption and shock absorption capacity is increased by more than 10 times. And the safety of ammunition is increased by more than 10 times.
7. Making a ship's explosion-proof deck
The ship deck is equipped with armor plates, foam aluminum plates and steel plate composite structures. The deck strength is increased by more than 2 times, and the anti-explosion and anti-ballistic capabilities are more than 2 times.
Second, rail transportation needs
1, the production of the sound absorption lining of the subway station with perforated foam aluminum sound-absorbing panels to make the subway station side wall and the top sound-absorbing panels, the thickness of 10mm, behind the 20mm thick cavity, even in the subway station The sound absorption and noise reduction effect is still maintained in the humid environment, and the noise reduction effect is more than doubled compared with other sound absorbing materials.
2, making high-speed railway soundproof screen
The high-speed railway sound barrier is made at a height of 2800mm, and the perforated foam aluminum sound-absorbing panel has a thickness of 10mm, and a 20mm thick air layer is arranged behind the back plate, and the rear plate is a galvanized steel plate. The inner side of the sound barrier is a foamed aluminum bare surface, which can absorb sound, and the whole wall can be soundproofed to achieve efficient noise reduction. After the foam aluminum is wet by the rain, the noise reduction function is not reduced, and the foam aluminum absorbs the shock. When the train passes the vibration, the rivet does not loosen and is safe for a long time.
3, making ordinary train floor
Ordinary train foam aluminum floor is composed of 1mm aluminum plate, 15～20mm foam aluminum plate and 1mm aluminum plate sandwich plate. The foamed aluminum density is about 0.5g/cm3, which has excellent sound insulation and vibration isolation function; no burning, good fireproof performance; bending strength It reaches about 20Mpa and has a service life of more than 30 years. It is light weight and is about 1/2 of the weight of the board.
4, making high-speed train floor
The foam aluminum floor for high-speed trains is composed of 1mm aluminum plate, 25-30mm foam aluminum plate and 1mm aluminum plate sandwich plate. The foam aluminum density is about 0.5g/cm3. Sound insulation of 20 decibels or more, vibration reduced by an order of magnitude, fire, corrosion resistance, bending strength of up to 20Mpa, no collapse, service life of more than 30 years.
5, making train door sandwich
The foam aluminum plate is used as the door sandwich material, which has excellent sound insulation, vibration isolation and heat insulation functions, and is isotropic when subjected to load.
6, making the car lining
The subway car is made of 20mm thick foam aluminum lining, which can reduce noise by more than 20dB. The side lining of the large-line train, high-speed train and city railway train is made of 20mm foam aluminum plate and 20mm polyurethane foam composite board, which has excellent dual functions of heat insulation and sound insulation.
7. Making a passenger compartment partition wall
The foam aluminum plate is used to make the passenger compartment partition wall, and the sound insulation and vibration isolation function is good, the strength is consistent in all directions, the strength is good, and the bird sound is not generated.
8, making electrical cabinets
Use foam aluminum sandwich panels (0.5mm aluminum plate, 5 ~ 10mm foam aluminum plate, 0.5mm aluminum plate) to make generators, motors, inverters, central air conditioners and other electrical cabinets that generate noise and electromagnetic wave equipment, which can reduce noise by more than 20 decibels, shielding The electromagnetic wave is more than 90 decibels.
9. Making a subway tunnel vent muffler
The sound-absorbing grille is made of a foamed aluminum sound absorbing panel, which can effectively reduce the noise of the tunnel vent.
Third, the construction needs
1. Making building sound lining
Use foam aluminum sound absorbing panels (thickness 10mm) to make noise reduction lining in the studio, dubbing room, concert hall, conference hall, stadium, etc. to avoid sound reverberation. The foam aluminum absorbing panel is provided with a cavity of 20~40mm thickness. The noise reduction effect is good.
2. Making the sound absorption wall of the swimming pool
Due to the high humidity in the swimming pool, the sound absorbing ability is greatly reduced after the ordinary sound absorbing material absorbs water. Noise reduction in swimming pools is a problem that the construction industry has long been difficult to solve. The perforated foam aluminum sound absorbing panel has a high sound absorption rate, and in a humid environment, the sound absorbing rate is not lowered, and the noise reduction effect is good. The aluminum foam acoustic panel has a thickness of 10 mm and a 20 mm thick cavity is placed behind it.
3, the production of high-rise aluminum, foam aluminum, aluminum panel building curtain wall panels
Manufacture of high-rise building curtain wall panels, foam aluminum plate thickness of 10mm, panel 0.5mm thick fluorocarbon lacquered aluminum plate, stiffness of more than 15Mpa. It has excellent performances such as energy absorption, sound insulation and heat insulation. The thermal expansion coefficient is the same inside and outside, ensuring smoothness, no burning and good fireproof performance.
4, making marble, foam aluminum curtain wall panels
3mm thick marble, 15mm thick foam aluminum plate composite, which is 2/3 lighter than solid marble plate, and the impact toughness is more than 2 times.
5, making sound insulation floor
The sound insulation of the building is a difficult problem. It is made of 5mm thick wood board and 10~15mm thick foam aluminum board composite floor. The sound of the floor is more than 20dB.
6, entertainment interior decoration
The foam aluminum sound-absorbing panels are used to make karaoke, nightclubs and other entertainment venues, ceilings and wall sound-absorbing decoration, good noise reduction effect, no burning, good fire performance.
Fourth, transportation needs
1. Making road sound barriers
The sound barrier of the elevated road and the viaduct can be made by using the foam aluminum sound absorbing panel, which can effectively reduce the low frequency noise generated by the automobile. The foam aluminum sound absorbing panel has a thickness of 10mm, and a 60mm thick cavity is arranged behind the back, and the total height is 2800mm, which is twice the noise reduction effect of the sound barrier of the ordinary louver sound absorbing panel.
2. Road tunnel noise reduction requirements
The sound-absorbing and noise-reducing wall of the road and the river tunnel is made of 10mm thick perforated aluminum foam board, and the 60mm thick cavity is arranged behind it, which can effectively absorb the low frequency noise generated by the car. The aluminum foam material does not absorb moisture, and still maintains good sound absorption and noise reduction effects, and the aluminum foam side wall can absorb impact kinetic energy and vibration waves to protect the inner wall of the tunnel. Aluminum foam material does not corrode, burn, and is safe to use.
3. Submarine tunnel noise reduction requirements
The sound-absorbing and noise-reducing wall of the river tunnel was made by using a 10mm thick perforated aluminum foam board, and a 60mm thick cavity was placed behind it. The humidity in the subsea tunnel is large, the foam aluminum material does not absorb moisture, and still maintains good sound absorption and noise reduction effects, and the foam aluminum sidewall can absorb the impact kinetic energy and vibration waves to protect the inner wall of the tunnel. The surface of the foam aluminum sound absorbing panel is nickel-plated and spray-coated to resist seawater corrosion.
Fifth. Demand for automobile manufacturing
1, making a car bumper
The foam bumper is used as a sandwich to make a car bumper, which has the function of absorbing impact kinetic energy. The thickness of the foamed aluminum core plate is generally 20 mm, the density is about 0.6 g/cm 3 , and the foamed aluminum material is a deformed aluminum alloy. This bumper represents the general trend of the world.
2, making car floor, door sandwich, etc.
The foam floor material is used to make the car floor, the partition, the door sandwich and the like to achieve the effect of sound insulation and vibration isolation.
3, making large car floor, etc.
The foam aluminum material is used to make the floor, lining and door sandwich of the large car. The sound insulation and vibration isolation effect are good, light weight, heat preservation, corrosion resistance, long service life, no burning and good fireproof performance.
4, making muffler
The aluminum alloy sound absorbing panels are used to make trucks, passenger cars and car mufflers. The foam aluminum sound absorbing panels are fire-resistant and can be applied to the exhaust gas temperature of 500-600 °C. The noise reduction effect is 2 to 3 times that of the expansion impedance type muffling inner core and the parallel resonance muffling inner core muffler, and the weight is reduced by about 1/3.
5. Making a filled foam aluminum profile body
The automobile body is made of aluminum profile filled with aluminum foam, the rigidity is increased by more than 2 times, and the damping and collision resistance are increased by more than 3 times.
6, making aluminum plate, aluminum foam, aluminum sandwich panel car roof
The thickness of the sandwich panel is about 2mm, the stiffness is 7 times that of the steel roof, and the weight is reduced by more than 50%.
7, the production of commercial car floor and car body
The commercial vehicle floor and the car body are made of a 10 mm thick foam aluminum sandwich plate, which is 50% lighter than the steel plate, has a strength increase of more than 3 times, and is corrosion resistant.
Sixth, shipbuilding industry demand
1. Noise reduction requirements for engine rooms of ordinary tugs and cargo ships
The sound absorption lining of the engine room is made of foam aluminum sound absorbing panel. The thickness of the foam aluminum sound absorbing panel is 10 mm, and the cavity behind it is 30-60 mm, which can reduce noise by more than 20 decibels.
2. Construction of passenger ships, mixed ships, and luxury ship structural requirements
The foam aluminum sandwich panel is used to make passenger ships, mixed ships, yacht cabins, partitions, hatches, inter-floors, etc. The density is 1/20 steel, light and energy-saving. The floor is made of 1mm thick aluminum plate, 20mm foam aluminum plate, 1mm. Thick aluminum plate structure, the strength is 7 times of the steel plate, the weight is reduced by more than 50%; the partition wall and the door can be made of 0.5mm thick aluminum plate, 10mm thick foam aluminum plate, 0.5mm thick aluminum plate sandwich plate, the strength is more than 3 times of the steel plate Sound insulation, good comfort, no burning, corrosion resistance.
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