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Heat absorption capacity and binder degradation characteristics of 3D printed cores investigated by inverse fourier thermal analysis
University of Miskolc, Miskolc, Hungary.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
ExOne GmbH, Augsburg, Germany.
2016 (English)In: International Journal of metalcasting, ISSN 1939-5981, E-ISSN 2163-3193, Vol. 10, no 3, 276-288 p.Article in journal (Refereed) Published
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Text
Abstract [en]

The application of 3D printing techniques is a recently developing area used within foundry technology. Digital production of sand molds and cores eliminates the need for hard tooling, drastically reduces lead times and offers design freedoms not possible in the traditional pattern making. Even though mold and core making technologies are refined from both scientific and practical points of view, casting defects may still occur in the final products. Thus, molding material related casting research is required to generate state-of-the-art methods and understandings to avoid the formation of casting defects. In this paper, a pioneering method is presented which is suitable to determine novel thermophysical and heat transfer properties of various types of molding materials. These properties are strongly connected to the cooling capacity and the gas evolution features of the cores used in casting production. The method is based on temperature measurements inside spherical shaped core sand specimens and evaluated by a special application of Fourier thermal analysis. Temperature measurements were performed in test samples produced by two different 3D core printing systems. The registered temperature data were processed by Fourier thermal analysis to calculate the thermal properties and the decomposition characteristics of the 3D printed cores. The experiments were executed under different heating conditions analogous to aluminium and cast iron production.

Place, publisher, year, edition, pages
2016. Vol. 10, no 3, 276-288 p.
Keyword [en]
3d printing, Aluminium, Cast iron, Casting defect, Core, Decomposition, Foundry, Molding material, Sand, Spherical, Temperature, Thermal analysis, Thermophysical, Aluminum, Coremaking, Defects, Foundries, Foundry sand, Fourier transforms, Heat transfer, Inverse problems, Iron, Molding, Molds, Printing, Temperature measurement, Thermoanalysis, 3-D printing, Molding materials, 3D printers
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-31242DOI: 10.1007/s40962-016-0043-5Scopus ID: 2-s2.0-84978042712Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-31242DiVA: diva2:952587
Available from: 2016-08-15 Created: 2016-08-15 Last updated: 2016-08-15Bibliographically approved

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Svidró, József TamásDiószegi, Attila
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