Role of Sand Grains in Sorption Processes by Surface Layers of Components of Sand Moulds

• Autorzy: Kaźnica N.

Identyfikatory

DOI

10.1515/afe-2017-0016

• Języki publikacji: EN

Abstrakty

EN

The results of researches of sorption processes of surface layers of components of sand moulds covered by protective coatings are presented in the hereby paper. Investigations comprised various types of sand grains of moulding sands with furan resin: silica sand, reclaimed sand and calcined in temperature of 700 ^oC silica sand. Two kinds of alcoholic protective coatings were used – zirconium and zirconium – graphite. Tests were performed under condition of a constant temperature within the range 30 – 35^oC and high relative air humidity 75 - 80%. To analyze the role of sand grains in sorption processes quantitavie moisture sorption with use of gravimetric method and ultrasonic method were used in measurements. The tendency to moisture sorption of surface layers of sand moulds according to the different kinds of sand grains was specified. The effectiveness of protective action of coatings from moisture sorption was analyzed as well. Knowledge of the role of sand grains from the viewpoint of capacity for moisture sorption is important due to the surface casting defects occurrence. In particular that are defects of a gaseous origin caused by too high moisture content of moulds, especially in surface layers.

Słowa kluczowe

EN

castings defects; moisture sorption; surface layer; furan moulding sands; sand grains

PL

wady odlewnicze; wilgoć; warstwa powierzchniowa; masa formierska furanowa; furan

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 1
• Strony: 87--92
• Opis fizyczny: Bibliogr. 11 poz.,i., rys., tab., wykr.

Twórcy

autor

Kaźnica N.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Al. Mickiewicza 30, 30-059 Cracow, Poland

Bibliografia

• [1] Lewandowski, J.L. (1991). Moulding and core sands. Warszawa: Wydawnictwo Naukowe PWN. (in Polish).
• [2] Bobrowski, A. (2009). Characterisation of recycling the dust from dry dust extraction of green sand with bentonite in terms of their utility use. Doctoral disseration. UST Univeristy of Science and Technology, Kraków. (in Polish).
• [3] Kowalski, J.S. (2011). Technological aspects of temperature – related transformations of silica sand in synthetic moulding mixture. Monograph 394, Mechanics Series, Kraków. (in Polish).
• [4] Holtzer, M. (2001). Waste and by-products disposal in foundry plants. Kraków: Uczelniane Wydawnictwa Naukowo – Dydaktyczne AGH. (in Polish).
• [5] Dańko, J., Lewandowski, J.L. (2000). Evaluation methods analysis of waste core and moulding sand ability for reclamation with particular taking into consideration industrial methods. III Konferencja Odlewnicza Technical 2000, 11-12 May 2000. (pp. 35–42), Nowa Sól. (in Polish).
• [6] Kaźnica, N. & Zych, J. (2015). Investigations of the sorption process' kinetics of sand moulds' surface layers under conditions of a high air humidity. Archives of Foundry Engineering. 15(spec.3), 29-32.
• [7] Di Muoio, G.L., Tiedje, N.S., Johansen, B.B. (2014). Automatic vapour sorption analysis as a new methodology for assessing moisture content of water based foundry coating and furan sands. 10th International Symposium on the Science and Processing of Cast Iron – SPCI10, 10–13 October 2014, Mar del Plata, Argentina.
• [8] Zych, J. (2006). Moulding sands surface layer – kinetics of the changes its property. Archives of Foundry. 6(20), 77-84. (in Polish).
• [9] Zych, J. (2006). Effecting the weather conditions on the surface layer condition of moulds made with moulding sand with the chemical bonding. Archives of Foundry. 6(22), 576-581. (in Polish).
• [10] Zych, J. (2009). Behavior of Chemically Bonded Molding Sands in Dry Air. International Journal of Metalcasting. 3(2), 17-24.
• [11] Dańko, R. (2008). Testing of reclamation ability of used moulding sand with furan resin. XI Konferencja Odlewnicza Technical 2008, 29 – 31 May 2008, (pp. 99–106), Nowa Sól. (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).