The hole connecting part of the sphere-opening type consists of bubble compartments and small round holes on the compartment walls, which is equivalent to hollowing out the compact aluminum with several tightly packed hollow spheres, forming a space that can allow gaseous or liquid substances to flow and pass through the aluminum body, so the aluminum foam is also known as metal sponge. Spherical open cell type aluminum foam bubble chamber is spherical, relatively regular, each sphere is arranged very closely to each other, each chamber wall is open small round holes to connect the other spheres, open to six directions, the connectivity rate of more than 90%.
Sphere connected by the pore structure is conducive to the absorption of energy and filtration, because it is not straight through the hole, the energy through the sphere and the pore through the repeated conversion, the flow rate and the flow rate will be gradual attenuation changes.

Used for sound absorption and noise reduction, the ideal application effect can be obtained through the design and process control of the sphere size (diameter 2-13mm), wall hole size (diameter 0.5-4mm), hole wall thickness and plate thickness. Bulk density: about 0.8g/. Appraised by the Building Materials Testing Center of the Ministry of Construction.
Beihai Composite aluminum foam noise reduction coefficient exceeds the international standard, is currently the top product of the aluminum foam sound-absorbing materials at home and abroad, applicable to all types of carrier box and mechanical equipment sound reduction and noise reduction.
Used for anti-impact energy absorption, the round dense stacked structure has incomparable advantages: spherical bubble chamber, round wall holes, and relatively regular chamber walls make the sphere-opening type more resistant when absorbing energy against impact. Compared to closed-cell types produced by gas foaming and slow-release foaming methods, they have a longer cushioning time and do not rebound when receiving impact energy. Compared with other types of open cell aluminum foam, the compressive (44Mpa) and flexural (27Mpa) strengths of the sphere open cell type are much higher, which is a significant improvement.