• Automated Fabrication of Complex Molded Parts Using Mold SOM 

      Cooper, A.G.; Kang, S.; Kietzman, J.W.; Prinz, F.B.; Lombardi, J.L.; Weiss, L. (1998)
      Mold Shape Deposition Manufacturing (Mold SDM) is a Solid Freeform Fabrication technique for producing complex shaped fugitive wax molds. A vari~ty of castable. polymer and ceramic materials have been used to make parts ...
    • Fabrication ofCurved Ceramic / Polymer Composite Transducers for Ultrasonic Imaging Applications by Fused Deposition of Ceramics 

      Lous, G.M.; Cornejo, I.A.; McNulty, T.F.; Safari, A.; Danforth, S.C. (1998)
      Fused Deposition of Ceramics (FDC), developed at Rutgers University, is a Solid Freeform Fabrication (SFF) technique where a three-dimensional green ceramic object is built layer by layer, starting from a Computer Aided ...
    • Functionally Optimized Ceramic Structures 

      Gasdaska, C.; Clancy, R.; Ortiz, M.; Jamalabad, V.; Virkar, Anil; Popovitch, Dragan (1998)
      The feasibility of using the Fused Deposition of Ceramics (FDC) process to rapidly fabricate functional quality advanced ceramic components has been demonstrated Multiple extrusion heads enable the deposition ofspatially ...
    • Features in Layered Manufacturing of Heterogeneous Objects 

      Qian, Xiaoping; Dutta, Debasish (1998)
      The usage of features in computer aided design and manufacturing has increased significantly over the last decade. By and large, all such features are geometric (form features). In this paper, we shall discuss the need ...
    • Composites with Gradient Properties From Solid Freeform Fabrication 

      Gervasi, V.R.; Crockett, R.S. (1998)
      TetraCast is a build style developed by Milwaukee School ofEngineering involving stereolithography patterns produced with an open cellular structure inside a surface shell. Composites are created using this pattern as a ...
    • Net Shape Fabrication of SiC and SiC/SiC Components Using Laminated Object Manufacturing (LaM): Overall Process Flowchart 

      Klosterman, Don; Chartoff, Richard; Osborne, Nora; Graves, George; Lightman, Allan; Bezeredi, Akos (1998)
    • Properties of a High Temperature Liquid Crystal Stereolithography Resin 

      Chartoff, R.P.; Schultz, J.W.; Bhatt, J.; Ullett, J.S. (1998)
      A liquid crystal monomer has been developed that contains both acrylate and acetylene reactive groups. The curing behavior and mechanical properties ofthe polymers formed from this monomer have been characterized in this ...
    • Direct Laser Fabrication of a Gas Turbine Engine Component - Microstructure and Properties - Part I 

      Das, Suman; P. Fuesting, Timothy; Danyo, Gregory; E. Brown, Lawrence; Beaman, Joseph J.; Bourell, David L.; Sargent, Kathleen (1998)
      This paper presents the development of a new technique for the production of abrasive turbine blade tips by direct laser processing. This superalloy cermet component is an integral part of the low pressure turbine sealing ...
    • Laser Polishing of Silica Rods 

      Wang, Hongyun; Bourell, David; Beaman, Joseph J. (1998)
      Lasers have been widely used in surface modification. In this research a CO2 continuous wave laser has been used to polish the.slot surface of the silica rods. The strong absorption of the lO.6 JlmC02 radiation by the ...
    • Surface Finishing of Selective Laser Sintering Parts with Robot 

      Shi, Dongping; Gibson, Ian (1998)
      Compared with conventional subtractive manufacturing technologies, RP has great benefits in shortening the design-manufacture cycle time of a product. Even ifmechanical properties are not considered, most RP products ...
    • Geometry Processing for SLSIHIP 

      Venkataramani, Ravi; Das, Suman; J. Beaman, Joseph (1998)
      SLSIHIP is a new net shape manufacturing method that combines the strengths of direct selective laser sintering and hot isostatic pressing. Direct selective laser sintering is a rapid manufacturing technique that ...
    • Process Control of3D Welding as a Droplet-Based Rapid Prototyping Technique 

      Kovacevic, R.; Beardsley, H. (1998)
      Three-dimensional welding is investigated as a rapid prototyping technique for the production of real Inetallic parts using gas metal arc welding principles. A high speed machine vision system is used to study the ...
    • Study of Ejection Forces In The AIM™ Process 

      Hopkinson, Neil; Dickens, Phil (1998)
      The AIM™processhas been used to successfully produce short runs ofinjection moulded parts. One ofthe main drawbacks ofthe process is the tendency ofthe tools to be damaged during part ejection1 . At De Montfort University ...
    • Thermal Behavior in the Lens Process 

      Griffith, M.; Schlienger, M. E.; Harwell, L. D.; Oliver, M. S.; Baldwin, M. D.; Ensz, M. T.; Smugeresky, J. E.; Essien, M.; Brooks, J.; Robino, C. V.; Hofineister, W. H.; Wert, M. J.; Nelson, D. V. (1998)
      Direct laser metal deposition processing is a promising manufacturing technology which could significantly impact the length oftime between initial concept and finished part. For adoption ofthis technology in the ...
    • Enhanced controlling of the SLS Process during a build. 

      . Papadatos, Alexandre L; Stanley Jr, Kenneth; Ahzi, Said; W. Paul, Frank (1998)
      Current commercial Rapid Prototyping(RP) systems like Stereolithography (3D Systems Corporation) and Selective Laser Sintering (DTM Corporation) use galvanometers from General Scanning Inc. (GSI) for thepositi()ning of ...
    • Real Time Video Microscopy for the Fused Deposition Method 

      Bossett, Evan; Rivera, Lorna; Qiu, Dan; McCuiston, Ryan; Langrana, Noshir; Rangarajan, Shriram; Venkataraman, Natesan; Danforth, Stephen; Safari, Ahmad (1998)
      Fused deposition is a layered manufacturing technology, which is being investigated for fabrication of functional parts. Defects and voids in the build process affect the quality andlevel of accuracy of components. These ...
    • Prototyping Large-Sized Objects Using Freeform Thick Layers of Plastic Foam 

      Lennings, A.F.; Broek, J.J.; Horvath, I.; Smit, A.; Vergeest, J.S.M. (1998)
      Current Rapid Prototyping systems are primarily aimed at small-sized objects containing many shape details. In this paper a Rapid Prototyping technology is presented that is aimed at largesized objects having a complex, ...
    • Thermal Behavior of Parts Made by Direct Metal Laser Sintering 

      Karapatis, N. P.; Guidoux, Y.; Gygax, P. E.; Glardon, R. (1998)
      The Direct Metal Laser Sintering (DMLS) manufacturing technique induces thermal stresses in parts. When such parts are used at elevated•. temperatures, residual stresses are relaxed and the part can suffer significant ...
    • Measurement and Modeling of Residual Stress-Induced Warping in Direct Metal Deposition Processes 

      Klingbeil, N.W.; Beuth, J.L.; Chin, R.K.; Amon, C.H. (1998)
      ct Tolerance loss due to residual stress-induced warping is a major concern in solid freeform fabrication (SFF) processes. An understanding of how residual stresses develop and how they lead to tolerance loss is a key ...
    • FilM SysteDls and Local Adaptive Slicing 

      Tyberg, Justin; Bohn, Jan HeIge (1998)