Potential of the application of the modified polysaccharides water solutions as binders of moulding sands

• Main Authors: K. Kaczmarska, B. Grabowska, D. Drożyński
• Format: Article
• Language: English
• Published: Croatian Metallurgical Society 2015-10-01
• Series: Metalurgija
• Subjects: foundry; moulding sand; microwave; binder; modified starch
• Online Access: http://hrcak.srce.hr/file/209279

The results of preliminary tests of selected properties of the moulding sands with the binder in the form of a 5 % water solution of the sodium salt of carboxymethyl starch (with a degree of substitution (DS) of 0,2 and 0,87) arepresented in this study. The moulding sand properties such as permeability, abrasion resistance, tensile and bendingstrength - after curing - are shown in series of tests. The cure process was conducted in a field of electromagnetic radiation within the microwave range. The effect of the microwave treatment on the moulding sand was evaporating of water (solvent in a binder) and cross-linking of the polymeric binder. As a result the cured moulding sands with particular properties, essential in the context of its application in the mould technology in the foundry industry, were obtained.