Effect of Sand Wetting on Physically Hardened Moulding Sands Containing a Selected Inorganic Binder. Part 1

• Autorzy: Stachowicz M. , Granat K. , Pałyga Ł.

Identyfikatory

DOI

10.1515/afe-2016-0006

• Języki publikacji: EN

Abstrakty

EN

In the paper, an attempt was made to evaluate the effect of preliminary wetting of high-silica base during preparation of moulding sands containing a selected grade of sodium water-glass, designed for hardening by traditional drying or by electromagnetic microwaves at 2.45 GHz. In the research, some water was dosed during stirring the sandmix before adding 1.5 wt% of the binder that was unmodified sodium water-glass grade 137, characterised by high molar module within 3.2 to 3.4. Scope of the examinations included determining the effect of wetting the base on mechanical parameters like compression, bending and tensile strength, as well as on technological parameters like permeability, abrasion resistance and apparent density. The research revealed a significant positive effect of adding water to wet surfaces of high-silica base grains on mechanical properties and quality of moulding sands hardened by physical methods, in particular by microwave heating.

Słowa kluczowe

EN

foundry engineering; microwaves; water glass; wetting; strength

PL

odlewnictwo; mikrofale; szklanka wody; zwilżanie; wytrzymałość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 1
• Strony: 73--78
• Opis fizyczny: Bibliogr. 18 poz., il., tab., wykr.

Twórcy

autor

Stachowicz M.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology, ul. Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Granat K.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology, ul. Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Pałyga Ł.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology, ul. Smoluchowskiego 25, 50-372 Wrocław, Poland

Bibliografia

• [1] Stachowicz, M. & Granat, K. (2014). Possibilities of reclamation microwave-hardened molding sands with water glass. Archives of Metallurgy and Materials. 59 (2), 757-760.
• [2] Stachowicz, M. (2015). Possibility of activating used-up inorganic binders on the example of sandmixes containing water-glass hardened by traditional drying. Conference „Foundry engineering. Technology – Practice – Ecology” Karpacz. 25-27.03.2015 (in Polish).
• [3] Jelinek, P. (2005). The development of inorganic binders for dehydratation microwave curing. VIII Foundry Conference Technical 2005. Nowa Sól 12÷13.05.2005, 5-13 (in Polish).
• [4] Wang, J., Fan, Z., Zan, X. & Pan, D. (2009). Properties of sodium silicate sand hardened by microwave heating. China Foundry. 6 (03), 191-196.
• [5] Stachowicz, M., Granat, K. & Nowak, D. (2010). Studies on the possibility of more effective use of water glass thanks to application of selected methods of hardening. Archives of Foundry Engineering. 10 (spec. iss. 2), 135-140.
• [6] Stachowicz, M. (2012). Influence of microwave heating parameters and composition of the moulding sands with water-glass on the properties of foundry molds and cores. Wroclaw University of Technology, Poland (in Polish).
• [7] Hutera, B. & Nowicki, P. (2009). The influence of the binder chemical structure on the course of surface processes. Archives of Mechanical Technology and Automation. 29 (3), 41-49 (in Polish).
• [8] Hutera, B., Smysky, K. & Drożyński, D.(2007). Influence of lowered temperature on wettability of quartz grains by binders used in moulding sands. Archives of Mechanical Technology and Automation. 27 (1), 47-55.
• [9] Lewandowski, J.L. (1997). Materials for casting moulds. Kraków: Akapit (in Polish).
• [10] Bobrowski, A., Kmita, A., Starowicz, M., Stypuła, B. & Hutera, B. (2012). Effect of Magnesium Oxide Nanoparticles on Water Glass Structure. Archives of Foundry Engineering. 12 (3), 9 – 12.
• [11] Kmita, A. & Hutera, B.(2012). Effect of water glass modification on its viscosity and wettability of quartz grains. Archives of Foundry Engineering. 11 (3), 59 – 62.
• [12] Kmita, A., Hutera, B., Olejnik, E. & Janas, A.(2012). Effect of water glass modification with nanoparticles of zinc oxide on selected physical and chemical properties of binder and mechanical properties of sand mixture. Archives of Foundry Engineering. 12 (spec. iss. 2), 37 – 40.
• [13] Dobosz, S.M. & Major-Gabryś, K.(2004). Glassex - new additive to improve knock-out properties of sandmixes containing water-glass. Archives of Foundry Engineering. 4 (13), 63 – 68. (in Polish).
• [14] Stachowicz, M., Granat, K. & Nowak, D.(2011). Effect of α-Al2O3 additive on residual strength of microwave-hardened sandmixes containing water-glass. Archives of Foundry Engineering. 11 (2), 203-208. (in Polish).
• [15] Stachowicz, M., Granat, K. & Nowak, D. (2011). Effect of bentonite addition on residual strength of microwave-hardened waterglass-containing moulding sands. V11 - SI3.
• [16] Dobosz, S.M. (2006). Water in moulding and core sands. Kraków. Akapit Publishing House (in Polish).
• [17] Stachowicz, M., Granat, K. & Nowak, D. (2010). Effect of hardening method and structure of linking bridges on strength of water glass moulding sands. Archives of Foundry Engineering. 10 (spec. iss. 2), 141-146. (in Polish).
• [18] Eun-Hee, K., Je-Hyun, L., Yeon-Gil, J., Jung-Chel, J. & Ungyu, P. (2013). Control of H2O generated during the CO2 hardening process in a casting mold. Ceramics International. 39 (4), 3993–3998.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.