Advances in Technology of Soluble Cores for Die Castings

AUTHORS P. Jelínek1, E. Adámková1, F. Mikšovský1, J. Beňo1

ABSTRACT

A number of technologies is developed that substitute simple metal cores in the high-pressure casting technology. Soluble cores, namely on the salt basis, represent the highest prospect. The contribution gives the results of the production of salt cores by high-pressure squeezing and shooting with using a binder. Special attention is paid to the shape of NaCl salt crystals with additives and the influence on strength properties of cores. A technology of bonding the salt cores is developing. Salinity of circulating water is studied and it is checked with the aid of electrical conductance.

KEYWORDS

salt cores, manufacture, squeezing, shooting, cooking salt, bonding of cores, salinity, cleaning water, electric conductance

Fig. 6. H 2400 during dissolution of the glued core
Fig. 6. H 2400 during dissolution of the glued core
Fig. 7. Test with the VŠB – TUO glue during dissolution of the glued core
Fig. 7. Test with the VŠB – TUO glue during dissolution of the glued core
Fig. 9. Kinetics of dissolution of salt cores in dependence on pH and electric conductance
Fig. 9. Kinetics of dissolution of salt cores in dependence on pH and electric conductance

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