@ARTICLE{Jamrozowicz_Ł._Influence_2017, author={Jamrozowicz, Ł. and Kolczyk, J. and Kaźnica, N. and Pyziak, Z.}, volume={vol. 17}, number={No 1}, journal={Archives of Foundry Engineering}, howpublished={online}, year={2017}, publisher={The Katowice Branch of the Polish Academy of Sciences}, abstract={Measurements of the hardening process of the selected self-setting sands are presented in the hereby paper. Moulding sands were prepared on the matrix of „Szczakowa” sand of the Sibelco Company. Two resins: phenol-formaldehyde-furfuryl (FF/AF) and urea-formaldehydefurfuryl (MF/AF) were used for making moulding sands. – Methylbenzene-sulphonic acid was applied as a hardener for the moulding sand on FF/AF resin, while paratoluene-sulphonic acid for the moulding sand on MF/AF resin. Both hardeners were used in two concentrations: low – the so-called ‘slow’ hardener and high - ‘fast’ hardener. During investigations, the courses of the hardening process were determined, more accurately changes of the velocity of the ultrasound wave passage through the moulding sand cL = f(t) and changes of the moulding sand hardening degree versus time, Sx = f(t). In addition, the kinetics of the hardening process was determined. Measurements were performed on the research stand for ultrasound investigations.}, type={Artykuły / Articles}, title={Influence of the Hardener Type on the Hardening Process Kinetics of the Selected Self-setting Sands}, URL={http://www.czasopisma.pan.pl/Content/101970/PDF/afe-2017-0013.pdf}, doi={10.1515/afe-2017-0013}, keywords={Loose self-setting sands, Hardening kinetics, Ultrasound investigations}, }