The application of aluminum foam （2）

Demand for rail transit

1. Make sound absorbing lining of subway stations

The perforated aluminum foam sound absorption board is used to make the subway station side wall and top sound absorption board with a thickness of 10mm and a 20mm thick cavity at the back. The sound absorption and noise reduction effect is still good even in the humid environment of the subway station, and the noise reduction effect is more than double that of other sound absorption materials.

2.  the production of high-speed railway soundproof screen

The high speed railway sound barrier is made, the height is 2800mm, the thickness of the perforated aluminum foam sound absorption board is 10mm, the air layer is 20mm thick at the back, and the rear board is galvanized steel. The inside of the sound barrier is a bare surface of aluminum foam, which can absorb sound, and the whole wall can be soundproof to achieve efficient noise reduction effect. After aluminum foam is wet by rain, the noise reduction function is not reduced, aluminum foam energy absorption shock absorption, in the train after vibration, rivets will not loose, long-term safety.

3.make ordinary train floor

The common train aluminum foam floor is composed of 1mm aluminum plate, 15-20mm aluminum foam plate and 1mm aluminum sandwich plate. The density of aluminum foam is about 0.5g/cm, which has excellent sound insulation and shock isolation function. No burning, good fire performance; The bending strength reaches about 20Mpa, and the service life is more than 30 years. Light weight, about 1/2 of the weight of the board.  

4. the production of high-speed train floor

The aluminum foam floor for high-speed trains is composed of 1mm aluminum plate, 25 ~ 30mm aluminum foam plate and 1mm aluminum sandwich plate, and the aluminum foam density is about 0.5g/cm. Sound insulation is more than 20 decibels, vibration is reduced by an order of magnitude, fire prevention, corrosion resistance, bending strength of about 20Mpa, no collapse, service life of more than 30 years.

5. make the train door sandwich

Aluminum foam plate as the door sandwich material, with excellent sound insulation, vibration isolation, heat insulation functions, bearing the load, isotropy.

6. Make the compartment lining

The subway car is lined with 20mm thick aluminum foam, which can reduce noise by more than 20 decibels. The side lining of large-line trains, high-speed trains and urban railway trains is made of 20mm aluminum foam plate and 20mm polyurethane foam composite plate, which has excellent thermal insulation and sound insulation dual capabilities.

7. the production of passenger compartment separation wall

The aluminum foam plate is used to make the bus separation wall, which has good sound insulation and vibration isolation function, consistent strength in all directions and good strength, and does not produce bird singing sound.

8. Make electrical cabinets

With aluminum foam sandwich plate (0.5mm aluminum plate, 5 ~ 10mm aluminum foam plate, 0.5mm aluminum plate) to make generator, motor, frequency converter, central air conditioning and other noise and electromagnetic wave equipment electrical cabinets, can reduce noise more than 20 decibels, shield electromagnetic wave more than 90 decibels.

9. the production of subway tunnel vent muffler

The noise of the tunnel vent can be reduced effectively by making the sound absorbing grating with aluminum foam sound absorbing board.

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