Appliance Design - October 2008 - (Page 21)

PROTOTYPING PolyJet Objet Geometries, Rehovot, Israel, developed a technology called PolyJet, which jets a photopolymer. The print head on its machines selectively deposits the photopolmer, which is immediately cured by a UV light in the print head. Parts are built layer by layer, as with the other RP approaches. PolyJet technology provides high resolution, jetting layers as thin as 16 microns, permitting the fabrication of smooth, accurate, and highly detailed parts. Last year the company introduced a new rubber like material, TangoPlus FullCure930, which has a Hardness ShoreA value of 27. The materials’ elongation to break is 218 percent, its tensile strength at break is 1,455 MPa, and its tensile modulus ranges from 0.146 MPa to 0.263 MPa. This translucent material joins previous members of the Tango elastomer family, TangoGrey and TangoBlack, which also offer specific levels of elasticity. And just a few months ago, Objet unveiled a material called DurusWhite, FullCure430, which was formulated to simulate the toughness, strength, and flexibility of polypropylene. For toughness, it exhibits Izod Notched Impact of 44.22 J/m. For flexibility, it has elongation at break of 44.2 percent, and for strength it has a modulus of elasticity of 1,135 MPa. The mechanical properties of DurusWhite simulate polypropylene’s resistance to fatigue and enable snap-fit functionality, critical for products with hinging mechanisms. All of these developments make it more complex for design engineers to choose an RP technology for their needs, since choices were often heavily influenced by limitations in associated materials. But, at the same time, these innovations provide more opportunities to produce RP parts that more closely match the intentions of the final production part, permitting thorough pre-production evaluations and tests that were previously unattainable. < For more information, email: 3D Systems, grahamj@3dsystems.com Dimension 3D Printer, jroitenberg@dimensionprinting.com DSM Somos, Brian.Bauman@DSM.COM EOS, florian.pfefferkorn@eos.info Huntsman Advanced Materials, magnus_wied@huntsman.com Objet Geometries, info@2objet.com Stratasys, Fred.Fischer@Stratasys.com Z Corp., jtitlow@zcorp.com www.applianceDESIGN.com applianceDESIGN October 2008 21 AD02084CF.indd 1 1/15/08 10:59:16 AM http://www.caereports.com http://www.caereports.com http://www.applianceDESIGN.com

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Appliance Design - October 2008 Contents Editorial Shipments/Forecasts News Watch Prototyping - Materials Play the Part Prototyping - Mix & Match Motors Electronics Coatings Design Marts Association Report: AHRI Advertiser's Index

Appliance Design - October 2008

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