@ARTICLE{Holtzer_M._Method_2013,
 author={Holtzer, M. and Bobrowski, A. and Drożyński, D. and Makselon, J.},
 number={No 2},
 journal={Archives of Foundry Engineering},
 howpublished={online},
 year={2013},
 publisher={The Katowice Branch of the Polish Academy of Sciences},
 abstract={More and more foundry plants applying moulding sands with water-glass or its substitutes for obtaining the high-quality casting surface at the smallest costs, consider the possibility of implementing two-layer moulds, in which e.g. the facing sand is a sand with an organic binder (no-bake type) and the backing sand is a sand with inorganic binder. Both kinds of sands must have the same chemical reaction. The most often applied system is the moulding sand on the water-glass or geopolymer bases – as the backing sand and the moulding sand from the group of self-hardening sands with a resol resin – as the facing sand. Investigations were performed for the system: moulding sand with inorganic GEOPOL binder or moulding sand with water glass (as a backing sand) and moulding sand, no-bake type, with a resol resin originated from various producers: Rezolit AM, Estrofen, Avenol NB 700 (as a facing sand). The LUZ apparatus, produced by Multiserw Morek, was adapted for investigations. A special partition with cuts was mounted in the attachment for making test specimens for measuring the tensile strength. This partition allowed a simultaneous compaction of two kinds of moulding sands. After 24 hours of hardening the highest values were obtained for the system: Geopol binder - Avenol resin.},
 type={Artykuły / Articles},
 title={Method of the Moulding Sands Binding Power Assessment in Two-Layer Moulds Systems / Metoda oceny wielkości siły wiązania mas w układzie form dwuwarstwowych},
 URL={http://www.czasopisma.pan.pl/Content/87361/PDF/07_paper.pdf},
 doi={10.2478/afe-2013-0033},
 keywords={Innovative materials and foundry technologies, mechanical properties, Two-layer moulds, Moulding sands, Alkaline organicbinder},
}