Foundry sand core property assessment by 3-point bending test evaluation

Stauder, Bernhard; Kerber, Hubert; Schumacher, Peter

doi:10.1016/j.jmatprotec.2016.06.010

Cited by 45 publications

(26 citation statements)

References 10 publications

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“…In order to ascertain that sand is suitable for molding in the foundry industry, it is essential that sand characterization tests are carrried out in a systematic manner. The main properties of sand that are important for its use in the molding process are: adequate permeability for gas flow, narrow range of granulometric distribution, high degree of refractoriness, proper grain shape, high erosion resistance and good mechanical strength [6,7].…”

Section: Molding Sandmentioning

confidence: 99%

“…The N1 and SA2 sands presented very close values in the first 2 hours of the test, and, from this interval, the values of resistance of the former are higher than those of the latter. To evaluate the behavior of sands with organic binders, bending strength tests are the most widely applied for the quality control of casting sand [6]. When compared to P1 sand, SA2 sand presented higher values at most intervals.…”

Section: Green Sandmentioning

confidence: 99%

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Characterization of Flotation Tailings From Samarco and Other Varieties of Sand for Use in Sand Molding in the Foundry Industry

Figueiredo¹,

Oliveira²,

Silva³

et al. 2019

TMM

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Foundry sand used for molding should have specific properties so that molds with adequate strength, porosity, etc to produce defect free castings. Thus, characterization of two types of flotation tailings from the mineral processing of itabirites and three types of base sand for molding have been carried out. The resulting properties have been compared to evaluate the suitability of use of typical flotation tailing for the molding process. The main properties determined are the grain shape and structure, chemical composition, grain size distribution, fineness modulus, fines content, moisture content and loss on ignition. Furthermore other properties of these sands prepared with binders have been compared like compactability, permeability and green compressive strength for green sand. For cold set and sodium silicate/CO 2 processes properties like tensile strength and bending strength have been evaluated. The results show that the flotation tailing SA2 presented a good potential of use in the foundry. ResumoAs areias de fundição usadas para moldagem devem apresentar propriedades específicas, como adequada resistência, porosidade, etc, para produzir peças livres de defeitos. Assim, foram caracterizados dois tipos de rejeitos de flotação do beneficiamento do itabirito e três tipos de areia-base para moldagem. Os resultados foram comparados para avaliar adequação do uso do rejeito de flotação no processo de moldagem. As principais propriedades determinadas foram: forma e estrutura dos grãos, composição química, distribuição granulométrica, módulo de finura, quantidade de finos, umidade e perda por calcinação. Ademais, outras propriedades dessas areias misturadas com aglomerantes foram comparadas, como compactabilidade, permeabilidade e resistência à compressão a verde para areia verde. Para os processos de areia com resina e silicato de sódio/CO 2 foram avaliadas as resistência à tração e à flexão. Os resultados mostraram que o rejeito de flotação SA2 apresentou bom potencial para uso na fundição. Palavras-chave: Rejeito de flotação; Areia de moldagem; Fundição; Sustentabilidade.

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Section: Molding Sandmentioning

confidence: 99%

Section: Green Sandmentioning

confidence: 99%

Characterization of Flotation Tailings From Samarco and Other Varieties of Sand for Use in Sand Molding in the Foundry Industry

Figueiredo¹,

Oliveira²,

Silva³

et al. 2019

TMM

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“…Hence, modern technology is looking for molding mixtures with relatively high flexibility/elasticity. This mainly applies to core sands prepared with the addition of synthetic resins [1][2][3][4].…”

Section: New Challengesmentioning

confidence: 99%

Measurement of Molding Sand Elasticity

Major-Gabryś¹,

Grabarczyk²,

Dobosz³

et al. 2018

jcme

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The progressive mechanization and automation of industrial equipment is the driving force of progress, not only in the field of production but also in the measuring and control equipment. In mold production, the automation of processes such as forming molds and cores along with their assembly has led to increases in serial production, reductions in defects, and the shortening of molding times, among others. Thanks to automation in mold and core departments and the use of all sorts of manipulators, mold production in foundries has gained momentum. Unfortunately, in addition to the mentioned advantages, there are also new challenges as to the quality and properties of the molding and core sands used in highly automated foundries.This article presents recent research on molding sand elasticity. The topic was introduced as an attempt to answer the new needs of highly mechanized foundries. The article discusses a new method of measuring the resistance of molding materials to undergoing mechanical deformation (molding sand elasticity), with an additional analysis of the bending strengths of the tested samples. Precise measurements, test sample preparation, and interpretation of the received results are presented in the article.

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“…However, research also exists, which studies the Young's modulus of core materials. Stauder et al determined fracture stress and Young's modulus with 3-point-bending (3PB) experiments [7]. Griebel et al showed that strain should be measured optically, when determining Young's Modulus with a 4-point-bending (4PB) experiment [8].…”

Section: Introductionmentioning

confidence: 99%

Acoustical and Optical Determination of Mechanical Properties of Inorganically-Bound Foundry Core Materials

et al. 2020

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Inorganically-bound sand cores are used in many light-metal foundries to form cavities in the cast part, which cannot be realised by the mould itself. To enable FEM simulations with core materials, their mechanical properties have to be measured. In this article, we adapt methods to determine the Young’s and shear modulus, the Poisson ratio and the fracture strain of sand cores. This allows us to fully parametrise an ideal brittle FEM model. We found that the Young’s and shear modulus can be obtained acoustically via the impulse excitation technique. The fracture strain was measured with a high-speed camera and a digital image correlation algorithm.

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Foundry sand core property assessment by 3-point bending test evaluation

Cited by 45 publications

References 10 publications

Characterization of Flotation Tailings From Samarco and Other Varieties of Sand for Use in Sand Molding in the Foundry Industry

Characterization of Flotation Tailings From Samarco and Other Varieties of Sand for Use in Sand Molding in the Foundry Industry

Measurement of Molding Sand Elasticity

Acoustical and Optical Determination of Mechanical Properties of Inorganically-Bound Foundry Core Materials

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