Elasticity of Moulding Sands – a Method of Reducing Core Cracking

• Autorzy: Dobosz S. M. , Grabarczyk A. , Major-Gabryś K.

Identyfikatory

DOI

10.1515/afe-2017-0006

• Języki publikacji: EN

Abstrakty

EN

This paper focuses on mechanical properties of self hardening moulding sands with furfuryl and alkyd binders. Elasticity as a new parameter of moulding sands is investigated. With the use of presented testing equipment it is possible to determine force kinetics and deformation of moulding sand in real time. The need for this kind of study comes from the modern casting industry. New foundries can be characterized with high intensity of production which is correlated with high level of mechanization and automatization of foundry processes. The increasingly common use of manipulators in production of moulds and cores can lead to generation of new types of flaws, caused by breakage in moulds and cores which could occur during mould assembly. Hence it is required that moulds and cores have high resistance to those kinds of factors, attributing it with the phenomenon of elasticity. The article describes the theoretical basis of this property, presents methods of measuring and continues earlier research.

Słowa kluczowe

EN

innovative foundry technologies; innovative foundry materials; moulding sand; binder; elasticity; cracking

PL

innowacyjne technologie odlewnicze; innowacyjne materiały; piasek formierski; spoiwo; elastyczność

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 1
• Strony: 31--36
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr.

Twórcy

autor

Dobosz S. M.

• AGH University of Science and Technology in Cracow, Poland

autor

Grabarczyk A.

• AGH University of Science and Technology in Cracow, Poland

autor

Major-Gabryś K.

• AGH University of Science and Technology in Cracow, Poland

Bibliografia

• [1] Gröning, P., Schreckenberg, S. & Jenrich, K. (2015). Herstellung von hoch-komplexen Zylinderkurbel-gehäusen. GIESSEREI. 102(01), 42-47.
• [2] Zych, J. (2013). Bench Life (Work Time) of Moulding and Core Sands with Chemical Binders –a New, Ultrasound Investigation Method. Archives of Foundry Engineering. 13(4). 117-122. DOI 10.2478/afe-2013-0094.
• [3] Zych, J. (2007). Behavior of moulding sands with hydrophilic binders in dry air. Archives of Foundry Engineering. 7(4).189-192.
• [4] Hutera, B. Lewandowski, J.L. & Smyksy, K. (2006). Influence of temperature on the properties of selected binders used in core and moulding sand. Archives of Foundry. 6(20). 71-76. (in Polish).
• [5] Dobosz, St. M., Grabarczyk, A., Major-Gabryś, K. & Morek, J. (2016). Quality assessment of the moulding mixtures from the elasticity point of view. Technológ. 8(02), 19-25.
• [6] Grabarczyk, A., Dobosz, St. M., Major-Gabryś, K., Jakubski, J. & Morek, J. (2015). Elasticity – new criterion of moulding sands quality assessment. Archives of Foundry Engineering. 15(4), 39-42.
• [7] Polymer Additives and Mechanical Properties. Retrieved January 17, 2016, from: http://users.khbo.be/ coudevil/ voordrachten/puc/lexan2.htm
• [8] Galina, H. (1998). Physical chemistry of polymers. Rzeszów: OWPRz.
• [9] Przygocki, W. (2001). Polymer physics. Warsaw: PWN.
• [10] Sperling, L.H. (1992). Introduction to physical polymer science. New York: Wiley & Sons.
• [11] Riande, E., Diaz-Calleja, R., Prolongo, M., Masegosa, R. & Salom, C. (1999). Polymer Viscoelasticity: Stress and Strain in Practice. USA – New York: CRC Press.
• [12] Jakubski, J. & Dobosz, St.M. (2007). The thermal deformation of core and moulding sands according to the hot
• distortion parameter investigations. Archives of Metallurgy and Materials. 52(4), 421-427.
• [13] Dobosz St. M. & Jakubski J. (2001). Hot-distortion - important criterion of estimation of core sand's quality. Archives of Mechanical technology and Automotation. 21(1), 31-36.

Uwagi

PL

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