Compaction of Bulk Materials
To compact dry, mostly coarse-grained bulk materials, standard frequency external vibrators with 3000 vibrations/min are most suitable. The large vibration breadth (amplitude) in connection with a sufficient acceleration ensures an adequate penetration of the vibrations into the material to be compacted. Under this influence a motion (shifting against each other) of the individual particles takes place, which leads to a storage condition with a high density.
Since most bulk materials to be compacted do not have any liquid consistency and are largely homogeneous, use of high frequency external vibrators does not make sense here, due to the fact that surplus water gathering process cannot take place because of the dry consistency. The low vibration breadth, without reduction of friction through liquefaction, is not enough to move the coarse grains. Therefore external vibrators with 3000 vibrations/min are used. Since the bulk materials are usually homogeneous, no demixing occurs at the larger vibration breadths either.
- sand, e.g. moulding sand in foundries
- food in packaging plants (reduction of the packing volume)
- chimney Linings
- sand in pipes for later bending
- liquid chocolate (for deaeration)
- paper stacks in printing shops (for lining up)