Method and apparatus for producing concentric hollow spheres

摘要: Hollow spheres with precisely concentric inner and outer spherical surfaces are formed by applying vibrations to a nonconcentric hollow sphere while it is at an elevated temperature which fluid or plastic, the producing internal flows cause become concentric. Concentric can be mass produced extruding material such as glass metal injecting stream of gas into center extrusion form gas-filled tube. Vibrations applied extruded tube help break up individual bodies desired uniform size, tending reason surface tension, continuing application causing these