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Proceedings Paper

Sand, die and investment cast parts via the SLS selective laser sintering process
Author(s): Simon van de Crommert; Sandra Seitz; Klaus K. Esser; Kevin McAlea
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Paper Abstract

Complex three-dimensional parts can be manufactured directly from CAD data using rapid prototyping processes. SLS selective laser sintering is a rapid prototyping process developed at the University of Texas at Austin and commercialized by DTM Corporation. SLS parts are constructed layer by layer from powdered materials using laser energy to melt CAD specified cross sections. Polymer, metal, and ceramic powders are all potential candidate materials for this process. In this paper the fabrication of complex metal parts rapidly using the investment, die and sand casting technologies in conjunction with the selective laser sintering process are being explained and discussed. TrueForm and polycarbonate were used for investment casting, while RapidSteel metal mould inserts were used for the die casting trials. Two different SandForm materials, zircon and silica sand, are currently available for the direct production of sand moulds and cores. The flexible and versatile selective laser sintering process all these materials on one single sinterstation. Material can be changed fast and easily between two different builds.

Paper Details

Date Published: 25 September 1997
PDF: 11 pages
Proc. SPIE 3102, Rapid Prototyping and Flexible Manufacturing, (25 September 1997); doi: 10.1117/12.281306
Show Author Affiliations
Simon van de Crommert, DTM GmbH (Germany)
Sandra Seitz, DTM GmbH (Germany)
Klaus K. Esser, DTM GmbH (Germany)
Kevin McAlea, DTM Corp. (United States)


Published in SPIE Proceedings Vol. 3102:
Rapid Prototyping and Flexible Manufacturing
Rolf-Juergen Ahlers; Gunther Reinhart, Editor(s)

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