Datec GmbH Dosier + Automationstechnik

The cooler water dosing fulfills an essential task in moulding sand circuit. High-temperature moulding sand (50 °C or more) causes a number of problems when it is processed in the moulding plant. The moulding sand dries on the surface and condensation forms in large concentrations on the core surface. These effects result to a large extent in casting defects, which later have to be compensated at considerable time and effort. When using shake-out drums, the return sand has to be cooled down efficiently subsequent to shake-out. A further objective is adequate pre-wetting in order to allow the important maturing process to start during storage in the bunkers. The objective with regard to used sand conditioning in the drum is:

the used sand is required to be cooled uniformly and and moistened uniformly.

High-temperature moulding sand (50 °C or more) causes a number of problems when it is processed in the moulding plant. The moulding sand dries on the surface and condensation forms in large concentrations on the core surface. These effects result to a large extent in casting defects, which later have to be compensated at considerable time and effort. When using shake-out drums, the return sand has to be cooled down efficiently subsequent to shake-out. A further objective is adequate pre-wetting in order to allow the important maturing process to start during storage in the bunkers. The objective with regard to used sand conditioning in the drum is:

the used sand is required to be cooled uniformly and and moistened uniformly.

Complete separation of sand and iron takes place after shaking out in the drum. Cooling should also take place in the drum. Water must be added moderately, as the final sand and iron separation takes place at the exit to the drum. The sand is discharged through a sieve whilst the castings are carried over it. No measurement equipment can be accommodated in the drum.

Used sand should be cooled as much as possible.