e, aluminum foam is also known as a metal sponge.The bubble Chambers of the aluminum foam are spherical and relatively regular, with the spheres arranged very closely together.Each bulkhead opens a small circular hole to connect the other spheres in six directions, with a communication rate of more than 90%.
The structure of the sphere connected by the stoma is conducive to the absorption and filtration of energy. Since it is not directly connected to the pore, the energy passes through the sphere and the stoma after repeated conversion, and the flow rate and velocity will undergo gradual attenuation changes.
For sound absorption and noise reduction, the ideal application effect can be obtained through the design and process control of the size of the sphere (2-13mm in diameter), the size of the wall hole (0.5-4mm in diameter), the thickness of the hole wall and the thickness of the plate.
Volume density: about 0.8g/ m2.According to the appraisal of the national building materials testing center of the ministry of construction, the noise reduction coefficient conforms to the national standard. It is a product with good performance of foamed aluminum sound-absorbing material at home and abroad. It is suitable for noise reduction of all kinds of vehicle boxes and mechanical equipment.
For resisting impact and absorbing energy, the round dense packing structure has incomparable advantages: spherical bubble chamber, round wall hole and bulkhead are relatively regular, making the spherical open hole more resistant to impact and absorbing energy.Compared with the closed hole type produced by gas foaming and slow-release foaming, it has longer buffer time and does not rebound when receiving impact energy.Compared with other types of aluminum foam with open holes, the compression (44Mpa) and bending (27Mpa) strength of the ball with open holes is much higher, with a significant improvement .
