Opening Material as the Possibility of Elimination Veining in Foundries

• Autorzy: Hrubovčáková M. , Vaskova I. , Benkova M. , Conev M.

Identyfikatory

DOI

10.1515/afe-2016-0070

• Języki publikacji: EN

Abstrakty

EN

The main bulk density representation in the molding material is opening material, refractory granular material with a particle size of 0.02 mm. It forms a shell molds and cores, and therefore in addition to activating the surface of the grain is one of the most important features angularity and particle size of grains. These last two features specify the porosity and therefore the permeability of the mixture, and thermal dilatation of tension from braking dilation, the thermal conductivity of the mixture and even largely affect the strength of molds and cores, and thus the surface quality of castings. Today foundries, which use the cast iron for produce of casts, are struggling with surface defects on the casts. One of these defects are veining. They can be eliminated in several ways. Veining are foundry defects, which arise as a result of tensions generated at the interface of the mold and metal. This tension also arises due to abrupt thermal expansion of silica sand and is therefore in the development of veining on the surface of casts deal primarily influences and characteristics of the filler material – opening material in the production of iron castings.

Słowa kluczowe

EN

molding mixture; cold-box-amine; casting defect; opening material; veining

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 3
• Strony: 157--161
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Hrubovčáková M.

• Technical University of Košice, Institute of metallurgy, Department of Metallurgy and Foundry, Faculty of Metallurgy, Slovakia

autor

Vaskova I.

• Technical University of Košice, Institute of metallurgy, Department of Metallurgy and Foundry, Faculty of Metallurgy, Slovakia

autor

Benkova M.

• Technical University of Košice, Institute of Control and Informatization of Production Processes, Faculty of Mining, Ecology, Slovakia

autor

Conev M.

• Technical University of Košice, Institute of metallurgy, Department of Metallurgy and Foundry, Faculty of Metallurgy, Slovakia

Bibliografia

• [1] Jelínek, P. (2011). Foundry sand - sand mixtures binder system. ISBN 80-7078-326-5, VŠB – TU Ostrava 1996.
• [2] Thiel, J. (2011). Thermal expansion of chemically bonded silica sand, American Foundry society, Schaumburg, IL USA, AFS Proceedings. 1-10.
• [3] Hrubovčáková, M. & Vasková, I. (2015). Possibilities of burrs elimination from cores produced with cold-box-amine technology. Acta metallurgica slovaca. 21(1), 78-85. ISSN 1335-1532.
• [4] Vasková, I., Šebek, P. & Barto, M. (2006). Practical experience with core production technology of cold box. Acta mechanica slovaca. 10, 449-454. ISSN 1335 – 2393.
• [5] Brůna, M., Kucharčík, L. & Sládek, A. (2013). Complex evaluation of porosity in A356 aluminium alloy using advanced porosity module. In Manufacturing Technology. Journal for Science Research and Production. 13(1), 26-30.
• [6] Vasková, I., Smolková, M., Malik, J. & Eperješi, Š. (2008). Experience in forming and core mixtures by Alphaset technology. Archives of Foundry Engineering. 8(2), 141-144. ISSN (1897-3310).
• [7] Fošum, J. & Šebesta, B. (2003). Recent and perspective methods testing of sand mixtures in foundries. Slévarenství. 42(10), 410-415. ISSN 0037-6825 (in Czech).
• [8] Bolibruchová, D. & Brůna, M. (2013). Influencing the crystallization of secondary alloy AlSi6Cu4 with strontium. In: Manufacturing Technology. 3(1), 7 – 14, Czech Republic.
• [9] Jelínek, P., Mikšovský, F. (2004). The mechanism of the products. International Conference: Casting defects caused by mold materials. 17, ISBN 80-02-01632-7, Mílovy.
• [10] Vasková, I, & Hrubovčáková, M. (2015). Burrs from cores produced by cold-box- amine method and possibility of their elimination in Eurocast Košice s.r.o. company. In: Archives of Foundry Engineering. 15(special 1), 115-120. ISSN1897-3310.

Uwagi

PL

Opracowane ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.