• Moving Boundary Transport Phenomena in Selective Area Laser Deposition Process 

      Zong, Guisheng; Marcus, Harris L. (1991)
      The overall selective area laser deposition process was modeled using the two-layer, three dimensional solid phase heat transfer with the moving boundary condition considered, gas phase mass transfer, and film growth ...
    • A Flexible File Format for Solid Freeform Fabrication 

      Rock, Stephen J.; Wozny, Michael J. (1991)
      A flexible file format for Solid Freeform Fabrication data is presented which significantly improves on the de-facto industry standard STL format. The new format removes the redundancy present in STL files and can contain ...
    • A Framework for Thermal Spray Shape Deposition: The MD* System 

      Weiss, Lee E.; Prinz, Fritz B.; Siewiork, Daniel P. (1991)
      This paper present.s t.he framework for a solid-freeform-fabrication syst.em based on thermal spray shape deposition t.o build mult.i-mat.erial st.ruct.ures by incremen tal build-up of t.hin cross-sect.ional layers. The ...
    • Laminated Object Manufacturing (LOM): A Simpler Process 

      Feygin, Michael; Hsieh, Brian (1991)
      With Laminated Object Manufacturing (LQM) process, three dimensional objects are manufactured by sequentially laminating and cUtting two-dimensional cross-sections. The.rnediumused.inLOMprocess isaQhesive-coatedsheet• ...
    • Fabrication of Prosthetic Socket by Selective Laser Sintering 

      Rogers, W.E.; Crawford, R.H.; Beaman, J.J.; Walsh, N.E. (1991)
      Solid freeform fabrication technologies offer exciting possibilities for improving product quality by direct manufacture of products. .One example of such product improvement is the fabrication of artificial limb sockets ...
    • Selective Laser Sintering as a Rapid Prototyping and Manufacturing Technique 

      Kent, Nutt (1991)
      With accelerating growth and competition in today's global marketplace, manufacturers face the daunting tasks of meeting changing market needs, maintaining market share, and reasserting a technological edge. Now, more ...
    • Selective Laser of a Copper-PMMA System 

      Badrinarayan, B.; Barlow, J.W. (1991)
      The Selective Laser Sintering process was used to manufacture green copper parts from a copper-polymer mixture. PMMA was used as the polymer binder for the metal. The green part was fired in a furnace under reducing ...
    • Controlling the Microstructure of Arc Sprayed Shells 

      Fussell, P.S.; Kirchner, H.O.K; Prinz, F.B.; Weiss, L.E. (1991)
      Techniques for controlling the microstructure of sprayed steel structures are discussed in this paper. Steel is arc sprayed onto shaped substrates to form tooling. The quality of the tool is greatly influenced by the ...
    • A Model for Partial Viscous Sintering 

      Sun, Ming-shen; Nelson, Christian; Beaman, Joseph J.; Barlow, Joel J. (1991)
      A mathematical model describing the sintering rate of a viscous material powder bed is presented. This model assumes that the powder bed is composed of cubic packed, equal-size spherical particles. The sintering rate ...
    • Software Testbed for Selective Laser Sintering 

      Crawford, Richard H.; Beaman, J.J.; Das, Suman (1991)
      Computer software plays an important role in the implementation of Solid Freeform Fabrication (SFF) technologies. This paper describes a software testbed for processing part geometry for a particular SFF technology, ...
    • Accurate Rapid Prototyping 

      Levi, Heim (1991)
      The first stage of Rapid Prototyping life cycle as a new technology in the marketplace is gradually ending, and the second stage has already started. Many new vendors have introduced their products in this field, utilized ...
    • Utilizing Topological Information to Increase Scan Vector Generation Efficiency 

      Rock, Stephen J.; Wozny, Michael J. (1991)
      Demands for increased Solid Freeform Fabrication precision and speed suggest the need for advanced scanning techniques, such as boundary tracing, half-lap and multiple orientation scanning, or 'intel nt' scanning. Since ...
    • Three Dimensional Printing: Form, Materials, and Performance 

      Cima, Michael J.; Sachs, Emanuel M. (1991)
    • Advances in Stereolithography Accuracy 

      Jacobs, Paul F.; Richter, Jan (1991)
      It has been almost four years since the SLA - 1 ushered in the new technology of StereoLithography, and about 2\ years since 3D Systems introduced the SLA-250. Since then, nearly 300 systems have been installed worldwide ...
    • The Relationship of Process Characteristics of Stereolithography to Prototype Dimensions 

      Cariapa, V.; Liang, S.K.; Brower, W.E. (1991)
      A characteristic of the modem·day world is a continuous need ever changing designs of high quality products. This characteristic, along>with lower cost of comp\.iting,has led to the development of novel methods for ...
    • Post-Processing of Selective Laser Sintered Polycarbonate Parts 

      Nelson, J.C.; Vail, N.K. (1991)
      St\ldies were conducted·to det~rmine the effect of press\lre onpost-prpeessingofpolycarbonate coupons. No significant differences betweencou.pons processed at atmospheric •cQndidons.. andcouponsprpeessedin.vacuum were ...
    • Effect of Polymer Coatings as Intermediate Binders on Sintering of Ceramic Parts 

      Vail, N.K.; Barlow, J.W. (1991)
      It has been proposed that a thin polymer layer applied to the surfaces of finely divided ceramic powders would serve as a suitable intermediate binder for Selective Layer Sintering of ceramic pans. In this study, the ...
    • The Electrostatic Application of Powder for Selective Laser Sintering 

      Melvin, Lawrence S. III; Beaman, J.J. (1991)
    • Rapid Prototype for Foundry Tool Making: Curriculum and Industrial Projects 

      Menon, Unny; Koch, Martin (1991)
      This paper presents the evolution of an experimental .courseat Cal Poly which applies rapid prototyping techniques, enabling a concurrent engineering approach to product development. This is applied within our ...
    • Selective Laser Sintering of Cu-Pb/Sn Solder Powders 

      Frayre-Manriquez, J.A.; Bourell, D.L. (1991)
      Solid Freeform Fabrication (SFF) as an overall approach in the manufacturing field has been applied to very different areas and on different materials systems including polymers, ceramics, metals and vapor phase. Even ...