STUDIES ON THE PROPERTIES IMPROVEMENT AND APPLICATION OF NEW INORGANIC BINDERS USED IN THE MANUFACTURE OF ENVIRONMENT-FRIENDLY MOULDING AND CORE SANDS

The article gives the results obtained in a fragment of the studies, carried out under a statutory activity, on optimising of the foundry sand technology with new modified inorganic binders, chemically bonded and CO₂ hardened. The presented results of the investigations of the self-setting sands with new inorganic binders show the character of changes in basic technological parameters in function of the time and a variable content of the binding agents, allowing also for the important - from the foundry’s point of view - effect of ambient conditions, i.e. temperature and humidity, on the kinetics of the sand binding. In the case of CO₂ hardened sands, special attention was paid to the phenomenon of friability of these sands, which is considered an indication of the mould and core surface quality, and as such has an important effect on the quality of final products when fabricated under the industrial conditions.

Download 892.9 KB >>