Validation of the Theoretical Model of Determining the Strength of Cores Made by the Blowing Method

• Autorzy: Dańko R.

Identyfikatory

DOI

10.1515/afe-2017-0085

• Języki publikacji: EN

Abstrakty

EN

Core sands for blowing processes, belong to these sands in which small amount of the applied binding material has the ability of covering the sand matrix surface in a way which - at relatively small coating thickness - allows to achieve the high strength. Although the deciding factor constitute, in this aspect, strength properties of a binder, its viscosity and ability to moisten the matrix surface, the essential meaning for the strength properties of the prepared moulding sand and the mould has the packing method of differing in sizes sand grains with the coating of the binding material deposited on their surfaces. The knowledge of the influence of the compaction degree of grains forming the core on the total contact surface area can be the essential information concerning the core strength. Forecasting the strength properties of core sands, at known properties of the applied chemically hardened binder and the quartz matrix, requires certain modifications of the existing theoretical models. They should be made more realistic with regard to assumptions concerning grain sizes composition of quartz sands and the packing structure deciding on the active surface area of the contacts between grains of various sizes and - in consequence - on the final strength of cores.

Słowa kluczowe

EN

moulding sand; core sand; blowing method; core properties

PL

masa formierska; masa rdzeniowa; metoda wdmuchiwania; właściwości rdzenia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 3
• Strony: 27--30
• Opis fizyczny: Bibliogr. 11 poz., fot., rys., wykr.

Twórcy

autor

Dańko R.

• AGH University of Science and Technology, Faculty of Foundry Engineering, 30-059 Krakow, 23 Reymonta Str., Poland

Bibliografia

• [1] Grabowska, B., Malinowski, P. & Szucki, M. (2016). Thermal analysis in foundry technology. Journal of Thermal Analysis and Calorymetry. 126(1), 245-250.
• [2] Lewandowski, L. (1997). Molds for molds. Kraków. AKAPIT Publishing House, 598 pages. (in Polish).
• [3] Hutera, B. (2009). Boundary cases of model warp bonding in binder molds. Archiwum Technologii Maszyn i Automatyzacji. 29(1), 21-28. (in Polish).
• [4] Lass, A.M. (1963). Vaprosy teorii litiejnych processov. Maszgiz Publishing House, 148 pages (in Russian).
• [5] Melnikov, V.S. (1972). Adgezionnaja i kogezionnaja pročnost smolanogo svjazujuščego. Soverščenstvovanie technologii litejnogo proizvodstva. Prem Publishing House, 202 pages (in Russian).
• [6] Zych, J. (2005). The role of compacting in mold technology based on masses with water glass and organic binders. Przegląd Odlewnictwa. 55(2), 88-97. (in Polish).
• [7] Jakubski, J., Malinowski, P. & Dobosz, S. (2013). ANN modeling for analysing green moulding sand properties. Archives of Metallurgy and Materials. 58(3), 961-963.
• [8] Dańko, R. (2012). Strength model of self-setting moulding sands with synthetic resins in an aspect of the of the integrated matrix recycling process. Gliwice. Archives of Foundry Engineering Publishing House, 193 pages.
• [9] Dańko, R. (2010). Experiences gathered during reclamation of used water glass and bentonite sands in extra low and ambient temperature. International Journal of Cast Metals Research. 92-96.
• [10] Dańko, R. (2007). Development of energetic model for dry mechanical reclamation process of used foundry sands. International Journal of Cast Metals Research. 20(4), 228- 232.
• [11] Łucarz, M. (2015). Thermal reclamation of the used moulding sands. Metalurgija. 54(1), 109-112.

Uwagi

PL

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