A Furan No-Bake Binder System Analysis for Improved Casting Quality

Acharya, Shailee G.; Vadher, Jeetendra A.; Sheladiya, Manojkumar

doi:10.1007/s40962-016-0059-x

Cited by 17 publications

(7 citation statements)

References 3 publications

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“…Posited mechanism and crosslinking of FA polycondensates Fig. 11 Metal casting moulds from FURAN NO-BAKE process advantages of the FBN include its relative low-costs, dimensional precision, rapid hardening rate, production competence, and abundance of the raw material needed and the ease of sustainability [29,80]…”

Section: Methodsmentioning

confidence: 99%

Furfuryl Alcohol a Versatile, Eco-Sustainable Compound in Perspective

Iroegbu

Hlangothi

2018

Chemistry Africa

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Renewable agricultural biomass derived chemicals, their modifications and uses have seen multiplicity in numerous applications and important processes with major impacts on the pursuit for eco-sustainability. Such applications range include the energy sector, chemistry, pharmacy, the textile industry, paints and coatings, plastic industry, to name but a few. This field of lignocellulosic derived chemicals interconnects several scientific disciplines ranging from agriculture, biochemistry, engineering, environmental sciences, forestry, pharmacy, medicine, etc. hence making it difficult to have a single expert view on these complicated interactions. Therefore, the idea to create a focused review, specifically, on FA (an important furanic compound) is the main objective of this article. FA and its resultant derivatives exhibits an array of capabilities and fascinating properties in various fields of applications. As a compound or with co-reactants, it finds interesting applications as base and/or intermediate chemical compound, hypergolic rocket fuels, in flame resistant composites and coatings used in aerospace, auto, and the built environment; it also finds application as mortars, cementitious grouts, impregnating materials, and sealants due to its exceptional resistance to common corrosive chemicals such as acids, alkalis and other solvents when it is cross-linked. Coupled with its environmental and economic benefits FA has proved to be a remarkable eco-sustainable bio-derived compound.

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Section: Methodsmentioning

confidence: 99%

Furfuryl Alcohol a Versatile, Eco-Sustainable Compound in Perspective

Iroegbu

Hlangothi

2018

Chemistry Africa

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“…The major difference between the two processes is the manner in which the acid catalyst is introduced into the system. In the CSM method both resin and catalyst are added into a mixer with the sand [4]. The catalyst is always added first to the sand and thoroughly mixed before the resin is added because once the resin is added the hardening process starts immediately due to it being a two-part system.…”

Section: Introductionmentioning

confidence: 99%

Properties of furfuryl alcohol resins for conventional sand moulding and binder jetting applications

Tshabalala

Nyembwe²

2022

MATEC Web Conf.

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This paper compares two commercial acid-cured furfuryl alcohol resins. The first material is used for conventional sand moulding (CSM), while the second material was manufactured for the binder jetting process (BJP) using a Voxeljet VX 1000 printer. To that end, chromite sand test specimens were prepared following the American Foundry Society (AFS) procedures to assess various foundry properties, including flowability and flexural strength. The study provides valuable insight into furan resins' properties and differences. In addition, the investigation provides an understanding of the requirements for a suitable local furfuryl alcohol resin for the binder jetting process to produce quality three dimensional printed sand parts.

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“…In the case of furan and phenolic no-bake sands, for choosing the optimal type and amount of acid catalyst, strength tests are usually conducted to record the hardening characteristics of the investigated sand mixtures. 3,21 On the other hand, strength tests carried out at ambient temperature cannot provide sufficient information about the behavior of sand cores and molds when they are interacting with high-temperature liquid metal during the pouring process. In the literature, relatively few publications 22,23 can be found about the investigation of the properties of no-bake sands at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Acid Hardener on the Strength and Hot-Distortion Properties of No-Bake Sand Cores

2021

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In this research work, the effects of different amounts of acid hardener (30%, 40%, 60%, 80% weighted to the resin) on the hardening characteristics and hot-distortion properties of no-bake furan and no-bake phenolic bonded sand cores were studied. Bending tests were conducted on test bars with storage times of 1, 2, 3, 5, 7, 24h. Hot-distortion tests were carried out on specimens with storage times of 4h and 24h. The bending tests revealed that in the case of the furan binder system, the acid hardener is best utilized in terms of higher bending strength, in an amount of 40–60%, while in the case of the phenolic binder system, the amount of 60–80% acid hardener resulted in higher bending strength of the sand specimens. Too low (30%) acid hardener (catalyst) level produced low bending strength. Too high (80%) amount of acid hardener decreased the strength of the no-bake furan sand samples, and as can be seen from the SEM analysis, it damaged the binder bridges between the sand grains. The hot-distortion tests showed that there is a correlation between the catalyst content and the max. Deformation of the samples both in the furan and in the phenolic no-bake sand cores, which can be described with a maximum curve. Increasing the acid hardener changes the thermoplastic behavior of the phenolic resin, thus the binder bridges become more rigid and brittle. The acid hardener above 40% decreased the thermal stability of the furan and phenolic bonded test pieces. The research work also revealed significant differences between the specimens made with furan and phenolic binder and the effect of the storage time in terms of the bending strength and hot-distortion properties.

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A Furan No-Bake Binder System Analysis for Improved Casting Quality

Cited by 17 publications

References 3 publications

Furfuryl Alcohol a Versatile, Eco-Sustainable Compound in Perspective

Furfuryl Alcohol a Versatile, Eco-Sustainable Compound in Perspective

Properties of furfuryl alcohol resins for conventional sand moulding and binder jetting applications

The Influence of Acid Hardener on the Strength and Hot-Distortion Properties of No-Bake Sand Cores

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