The influence of microwave curing time and water glass kind on the properties of molding sands

• Autorzy: Granat K. , Nowak D. , Pigiel M. , Stachowicz M. , Wikiera R.
• Języki publikacji: EN

Abstrakty

EN

This work presents results of research on the influence of microwave heating time on the process of hardening of water glass molding sands. Essential influence of this drying process on basic properties such as: compression, bending and tensile strength as well as permeability and wear resistance, has been found. It has been proved, that all the investigated sorts of sodium water glass could be used as binding material of molding sands intended for curing with the microwave process heating. It has been found, while analyzing the results of property studies of microwave heated molding sands with 2.5% addition of water glass, that all available on the market kinds of this binding agent (including the most frequently used in foundry 145 and 149 kinds) after microwave heating guarantee very good compression, bending and tensile strength as well as permeability and wear resistance. Moreover, it has been determined that the optimal curing time of molding sands containing various kinds of water glass is 240 seconds. After this time, all basic properties of molding sands are stable. The use of microwave curing of water glass molding sands results in a significant decrease of hardening process time, full stabilization of molding sands as well as much lower energy consumption.

Słowa kluczowe

EN

innovative foundry materials; innovative foundry technologies; hardening time; microwaves; molding sand; water glass

PL

materiały innowacyjne w odlewnictwie; technologie innowacyjne w odlewnictwie; hartowanie; mikrofale; masa odlewnicza; szkło wodne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 4
• Strony: 79--82
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Granat K.

autor

Nowak D.

autor

Pigiel M.

autor

Stachowicz M.

autor

Wikiera R.

• Wrocław University of Technology, Department of Foundry and Automation, Łukasiewicza St 5, 50-371 Wrocław, Poland,

Bibliografia

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• [2] M. Pigiel, Water glass molding sands hardened with microwaves, Archiwum Technologii Maszyn i Automatyzacji, Wrocław, 1998 (in Polish).
• [3] J. Zych, Role of concentration in mold technology based on molding sands with water glass or chemical binders, Przegląd Odlewnictwa 2/2005 (in Polish).
• [4] P. Jelinek, H. Polzin, Researches on structures and strength properties of sodium silicate binder Giesserei-Praxis 2/2003 (in German).
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• [6] M. Perzyk, Foundry, WNT, Warszawa, 2004 (in Polish).
• [7] M. Pigiel, Preparation of microwave core hardening from quartz sand and thermally hardened resins, Raport ITMA nr 15/99, Wrocław, 1999 (in Polish).
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• [13] Samsonowicz Z. Wilczyński J. Wikiera R., Microwave hardening of fluid molding sands with organic binder, Prace Instytutu Odlewnictwa nr 38, Kraków, 1980 (in Polish).
• [14] Pigiel M., Application of microwave heating in foundry, Krzepnięcie Metali i Stopów nr 33, Zielina, 1997 (in Polish).
• [15] Spur G. Stöferle Manual of manufacturing technique part 1 moulding forms, Carl Hanser Verlag Uenchen, Vien, 1981 (in German).
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• [17] J. Zych, Condensation zone in molding sands with water glass - ultrasound studies if its formation kinetics, Przegląd Odlewnictwa 11-12/2003 (in Polish).
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