SUNConferences, 17th Annual Conference of the Rapid Product Development Association of South Africa

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Physical properties of sand parts produced using a Voxeljet VX1000 three dimensional printer (3DP)
Kasongo Nyembwe, Motadi Mashila, Malan van Tonder, Deon de Beer

Last modified: 2016-10-03


Successful case studies of metal casting applications using sand moulds and cores produced by additive manufacturing (AM) processes have been widely reported in the literature. The layered-based manufacturing process has revolutionized the traditional sand moulding and core-making methods. This is essentially due to the numerous advantages of AM, including reduction of design lead time and the ability to manufacture objects with complex geometry. Locally available AM process capable of producing sand core and molds include laser sintering and three dimensional printing, with the latter process growing in dominance compared to the former. A better understanding of the properties of parts produced by AM processes is required in order for the processes to be fully adopted by the local foundry industry. Crucial characteristics of 3DP parts related to strength, dimensional accuracy and hardness are not well known in terms of their magnitude and comparison with conventionally manufactured sand parts. In this investigation, the physical properties of test specimens produced under standard manufacturing conditions, using a VoxelJet VX1000 machine, will be assessed for bend, tensile and compression strength. The surface finish of test specimens will also be measured. The physical properties of 3DP test specimens will then be compared to the properties of laboratory test specimens produced according to procedures of the American Foundrymen Society. The results of the investigation will contribute to an increased knowledge of the characteristics of sand parts produced by 3DP.