Influence of Quartz Sand Quality on Bending Strength and Thermal Deformation of Moulding Sands with Synthetic Binders

• Autorzy: Dobosz S. M. , Grabarczyk A. , Major-Gabryś K. , Jakubski J.

Identyfikatory

DOI

10.1515/afe-2015-0028

• Języki publikacji: EN

Abstrakty

EN

Modern techniques of castings production, including moulding sands production, require a strict technological regime and high quality materials. In the case of self-hardening moulding sands with synthetic binders those requirements apply mainly to sand, which adds to more than 98% of the whole moulding sand mixture. The factors that affect the quality of the moulding sands are both chemical (SiO₂, Fe₂O₃ and carbonates content) and physical. Among these factors somewhat less attention is paid to the granulometric composition of the sands. As a part of this study, the effect of sand quality on bending strength Rg^u and thermal deformation of self-hardening moulding sands with furfural and alkyd resin was assessed. Moulding sands with furfural resin are known [1] to be the most susceptible to the sand quality. A negative effect on its properties has, among others, high content of clay binder and so-called subgrains (fraction smaller than 0,1mm), which can lead to neutralization of acidic hardeners (in the case of moulding sands with furfuryl resin) and also increase the specific surface, what forces greater amount of binding agents. The research used 5 different quartz sands originating from different sources and characterized with different grain composition and different clay binder content.

Słowa kluczowe

EN

innovative foundry technology; innovative foundry material; quartz sand; moulding sand; synthetic resin; hot distortion

PL

innowacyjna technologia odlewnicza; innowacyjny materiał odlewniczy; piasek kwarcowy; masa formierska; żywica syntetyczna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 2
• Strony: 9--12
• Opis fizyczny: Bibliogr. 11 poz., tab., wykr.

Twórcy

autor

Dobosz S. M.

• AGH University of Science and Technology in Cracow, Poland, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals

autor

Grabarczyk A.

• AGH University of Science and Technology in Cracow, Poland, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals

autor

Major-Gabryś K.

• AGH University of Science and Technology in Cracow, Poland, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals

autor

Jakubski J.

• AGH University of Science and Technology in Cracow, Poland, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals

Bibliografia

• [1] Dobosz, M. St. (2006). Water in sand molds and core. Cracow: Wydawnictwo Naukowe AKAPIT. (in Polish).
• [2] Lewandowski, J. L. (1997). Materials for molds. Kraków. Wydawnictwo Naukowe AKAPIT. (in Polish).
• [3] Lewandowski, J.L. (1990). Moulding and core mass. Warsaw. PWN. (in Polish).
• [4] Fedoryszyn, A. (1996). Grain size distribution parameters as the base of quality control of sand grains moulding sand. Solidification of Metals and Alloys. 26, 231-238. (in Polish).
• [5] Dobosz, St.M. & Gieniec, A. (2002). Study of the sand grains type on high temperature effects in foundry core sands. Archives of Foundry Engineering. 2, 33-38. (in Polish).
• [6] Dobosz, St. M. & Jakubski, J. (2001). Hot-distortion - important criterion of estimation of core sand quality. Archives of Mechanical Technology and Automation. 21, 195-196. (in Polish).
• [7] Ignaszak, Z. (2008). Chosen aspects of thermo-mechanical phenomena in resin bonded sands by use of Hot Distortion tests. Archives of Foundry Engineering. 8(1), 137-142.
• [8] Soból, P. M. (2015). Influence of the type of matrix grain on the properties of the molding sands with synthetic resin. Engineering dissertation. AGH University of Science and Technology.
• [9] Jakubski, J. & Dobosz, St. M. (2003). Influence of binder type on deformation of the core sands in high temperature. Materials Engineering. 10(3), 231-234.
• [10] Jakubski, J. & Dobosz, St. M. (2005). Thermal Deformation of Core Sands with Organic and Inorganic Binders. Výzkum a vývoj ve slévárenství, Sbornik mezinarodni conference, Roznov pod Radhostem. 6 – 7.9, 163-168.
• [11] Jakubski, J. & Dobosz, St. M. (2007). The thermal deformation of core and moulding sands according to the hot distortion parameter investigations. Archives of Metallurgy and Materials. 52(3), 421-427.