INVESTIGATIONS OF A CORRELATION BETWEEN THE TYPE AND AMOUNT OF MODIFIER, HIGH-TEMPERATURE TRANSFORMATIONS AND RESIDUAL STRENGTH OF SANDS WITH MODIFIED SODIUM SILICATES

The article presents the results of high-temperature investigations of the modified samples of hydrated sodium silicate and of the sand mixtures with an addition of this compound. To improve the knocking out proper...

more >>

The effect of wetting agent on the parameters of dry moulding silica sands bonded with sodium water glass

An attempt has been made to determine the effect of the addition of an agent wetting the surface of silica sand grains, introduced in order to increase the hardening efficiency of selected physical methods applied to the ecological foundry sands b...

more >>

Analysis of the drying process of moistened surface layers of sand moulds and cores on the example of moulding sand with water glass

An analysis of the drying process of surface layers of sand moulds and cores (made of loose self-hardening moulding sand with hydrated sodium silicate hardened with a liquid ester hardener) which was previously subjected to the process of moisture...

more >>

The role of the densification of moulding sands with inorganic binders in the modeling of their strength obtained after microwave hardening

The study attempts to complement the information on the effect of the density of moulding sands with inorganic binders on basic strength parameters, i.e. the tensile and bending strength of moulding sands with hydrated sodium silicate, after the p...

more >>

Effect of the way of modification of hydrated sodium silicate on the effectiveness of the changes in the residual strength of a moulding sand

The article discusses the ways of modification of hydrated sodium silicate as a silicate binder of moulding sands which were applied in the studies. It determines the change in the residual strength of the moulding sand with used silicate binders ...

more >>

The influence of heating method and the thickness of measuring cores made of olivine moulding sands with sodium silicate on the deformation tested with a DMA Hot-Distortion device

The article raises the issue of the influence of increased temperature on olivine moulding and core sands with an inorganic binder from the group of unmodified kinds of hydrated sodium silicates. Produced at laboratory conditions,&n...

more >>

Preliminary testing of microwave-cured joints made of adhesives based on hydrated sodium silicate and quartz sand

In this paper an attempt was made to explain the phenomena accompanying the formation and destruction of bonded elements of moulds and cores in which a mixture of unmodified hydrated sodium silicate with a molar module of 2.9 (...

more >>