Effect of Water-Glass Content on Electrical Properties of Silica Sand-Based Moulding Sand

• Autorzy: Opyd B. , Nowak D. , Granat K.
• Języki publikacji: EN

Abstrakty

EN

In the paper, presented are measurements of permittivity ε_r and loss factor tgδ of moulding sand depending on bonding material content, taken at 2.45 GHz by perturbation method on a stand of wave-guide resonance cavity. The determined electrical properties are crucial for kinetics of microwave heating of sandmixes containing water-glass as a binder. The measurements were taken for two sandmixes with various sand grains. The results indicate that, for a moulding sands containing water-glass, the relationship between loss factor value and binder concentration is linear. All the examined moulding sands, irrespective of their base, show a relatively high susceptibility to action of microwave field of frequency 2.45 GHz. The presented measurements make a ground for developing a mathematical model of microwave heating of the systems moulding sand-foundry tooling.

Słowa kluczowe

EN

innovative foundry technology; microwaves; moulding sand; water glass; electrical properties

PL

innowacyjna technologia odlewnicza; mikrofale; masa formierska; szkło wodne; właściwości elektryczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 3 spec.
• Strony: 59--62
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Opyd B.

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

autor

Nowak D.

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

autor

Granat K.

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

Bibliografia

• [1] Granat, K., Stachowicz, M. & Nowak, D. (2010). Application of innovative method of microwave hardening in manufacturing processes of cast-steel castings for machine-building industry, Archives of Mechanical Technology and Automation. 30 (1), 19-27 (in Polish).
• [2] Kowalski, S.J., Rajewska, K., Rybicki, A. (2005). Physical basics of microwave drying. Poznań: Editorial Office of Poznan University of Technology (in Polish).
• [3] Stachowicz, M., Granat, K. & Nowak, D. (2011). Application of microwaves for innovative hardening of environment-friendly water-glass moulding sands used in manufacture of cast-steel castings. Archives of Civil and Mechanical Engineering. 11 (1), 209-219. DOI: 10.1016/S1644-9665(12)60184-8.
• [4] Grabowska, B. & Holtzer, M. (2007). Application of microwave radiation for crosslinking of sodium polyacrylate/silica gel system used as a binder in foundry sands. Polimery. 52 (11/12), 841-847. ISSN: (0032-2725). (in Polish).
• [5] Ashby, M., Shercliff, D. & Cebon H. (2011). Materials Engineering, vol. 2. Publishing House Galaktyka Sp. z o. o, Łódź. (in Polish).
• [6] Mujumdar, S.A. (Ed.) (1995). Handbook of Industrial Drying . New York: Marcel Decker.
• [7] Lewandowski, L. (1997). Materials for casting moulds. Kraków: Akapit.
• [8] Dobosz, St.M. Grabarczyk, A., Major-Gabryś, K. & Jakubski, J. (2015). Influence of quartz sand quality on bending strength and thermal deformation of moulding sands with synthetic binders. Archives of Foundry Engineering. 15 (2), 9-12.
• [9] Granat, K., Opyd, B., Stachowicz, M., Nowak, D. & Jaworski, G. (2013). Usefulness of foundry tooling materials in microwave heating process. Archives of Metallurgy and Materials. 58 (3), 919-922. DOI: 10.2478/amm-2013-0101.