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Rapid Prototyping -- Selective Laser Sintering - SLS2008-1-21 9:31:45
The SLS?process creates three dimensional objects, layer by layer, from powdered materials with heat generated by a CO2 laser. The part is built inside of a cylinder that contains a moveable platform, and is formed layer-by-layer. A roller deposits a layer of powder across the top of the cylinder; the laser fuses the powder to create the part geometry and also bonds each layer to the one beneath i
Laminated Object Manufacturing - LOM2008-1-21 9:30:35
The LOM process builds layered, three-dimensional objects by stacking and fusing thin layers of paper that are trimmed to shape using a CO2 Laser. Essential to this process are software algorithms that slice a CAD file into cross sectional layers and coordinate this information with system hardware. The building sequence begins with the lamination of a fresh layer of adhesive paper to a solid base
Rapid Prototyping -- 3D Printing (3DP)2008-1-21 9:23:43
3D Printing, a patented MIT process, refers to the process of using an ink-jet print head to lay down a liquid adhesive on a layer of powder, binding the powder particles together. First, a thin distribution of powder is spread over the surface of a powder bed. From a computer model of the desired part, a slicing algorithm computes information for the layer. Using a technology similar to ink-jet p
Rapid Manufacturing -- Rapid Prototyping2008-1-21 9:17:30
Rapid prototyping (a.k.a. Desktop Manufacturing, Solid Free-form Manufacturing or Solid Free-form Fabrication) consists of various manufacturing processes by which a solid physical model of a part is made directly from 3D computer-aided design (CAD) model data. This CAD data may be generated by 3D CAD Modelers, CT and MRI scan data or model data created by 3D digitizing systems. To begin the Rapi
Plastics Comparison & Selection Guide2008-1-21 9:07:29
Plastics Selection Chart Common Name Properties Uses Common Forms Cost Rigid PVC (poly vinyl chloride) Wide range of colors. Stiff, hard
Plastic Thermal Expansion Coefficients2008-1-21 9:05:54
This chart compares the "Coefficient of linear thermal expansion" shown as a factor m/m.k in the table. All materials expand with changes in Temperature. Thermoplastics expand considerably more than metals (e.g. Carbon Steel 10.8 (10)-6 compared to UHMWPE 200 (10)-6 i.e. approximately 18 times more).Linear thermal expansion means the product will expand in all directions and this needs t
General Properties & Characteristics2008-1-21 9:03:59
Plastic Characteristics / Properties ABS (Acrylonitrile-butadiene-styrene) Rigid, low-cost thermoplastic, easily machined and thermo-formed. Acetal Engineering thermopl

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