Investigations of the Sorption Process’ Kinetics of Sand Moulds’ Surface Layers under Conditions of a High Air Humidity

• Autorzy: Kaźnica N. , Zych J.
• Języki publikacji: EN

Abstrakty

EN

The results of investigations of the sorption process of surface layers of sand moulds under conditions of a high air humidity are presented in the paper. Investigations comprised three kinds of moulding sands with inorganic and organic binders: moulding sand with hydrated sodium silicate with furfuryl resin and with alkyd resin. Tests were performed on the prototype research stand allowing to maintain a constant, high temperature of surroundings (28–33°C) and the relative air humidity (above 95%). The gravimetric method was applied in measurements. The proposed method allows to assess the amount of water which permeates by the area unit of surface layers of sand moulds into their insides. Knowledge of such parameter allows to select the proper storage conditions of casting moulds waiting for being poured with liquid metals. This can limit the occurrence of surface defects which are caused by too high humidity of casting moulds.

Słowa kluczowe

EN

sand mould; surface layer; moisture sorption; furan moulding sands; alkyd moulding sands; water glass

PL

forma piaskowa; warstwa powierzchniowa; sorpcja wilgoci; furanowa masa formierska; szkło wodne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2015
• Tom: Vol. 15, iss. 3 spec.
• Strony: 29--32
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Kaźnica N.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Zych J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Department of Moulding Materials, Mould Technology and Cast Non-Ferrous Metals, al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] Aksielrud, G.A., Altszuler, M.A. (1987). Mass movements in porous bodies. Warszawa: Wydawnictwa Naukowo–Techniczne.
• [2] Świrska-Perkowska, J. (2012). Adsorption and moisture movements in porous building materials under isothermal conditions. Warszawa: Komitet Inżynierii Lądowej i Wodnej PAN.
• [3] Zych, J. (2006). Moulding sands surface layer – kinetics of the changes its property. Archives of Foundry. Vol. 6, Issue 20, 77-84.
• [4] Zych, J. (2006). The behaviour of moulding sands with chemical binders in changeable weather conditions. XXX Konferencja Naukowa z okazji Święta Odlewnika 2006 – Nowoczesne technologie w odlewnictwie. (43-50) Kraków, Wydział Odlewnictwa Akademii Górniczo-Hutniczej, Stowarzyszenie Techniczne Odlewników Polskich Oddział Krakowski, Fundacja Wydziału Odlewnictwa AGH, Stowarzyszenie Wychowanków AGH.
• [5] 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 Engineering, Vol. 6, Issue 22, 576-581.
• [6] Zych, J. (2007). Behaviour of chemically bonded moulding sands in dry air. Przegląd Odlewnictwa, nr 9/2007, 476-482.
• [7] Zych, J. (2009). Behavior of Chemically Bonded Molding Sands in Dry Air. International Journal of Metalcasting, Vol. 3, Issue 2, 17–24.