CompositesWorld

OCT 2018

CompositesWorld

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NEWS 71 CompositesWorld.com Thermoplastic Composites reducing cost. Rail production alone was reduced from seven steps to two. At Renault's assembly plant, the new sunroof system, including the roller blind, arrives fully assembled and pretested as a one- piece unit that is robotically bonded to the roof, eliminating two to three assembly steps and allows an operator to be reassigned, reducing cost and time even further. Reportedly, the initial system cost reduction was around 20%, but the new module has fewer parts, which is expected to reduce warranty costs long- term as indicated by lower parts per million (PPM) defects and higher quality seen at Renault. Another benefit from the new composite rails is that a Z-axis element-stack reduc- tion of >13 mm was achieved because the whole module is adhesively bonded directly to the BIW instead of the conventional two-to-three- step process, during which rails are fastened with screws to the BIW and the module is then fastened to the rails. is not only provides more working space on the assembly line for workers, but also gives taller vehicle occupants more headspace. Another subtle improvement was that NVH was reduced during sunshade operation to open or close the huge daylight opening on both models of the vehicle. Like aluminum, the composite rails are fully recyclable, but less energy is needed to produce them initially and to recycle them at end of vehicle life, which, arguably, also makes them better for the environment. (Interestingly, the team also found that no lubricant was needed on the composite rails for reliable sunshade operation.) "When Jacques Vivien of Webasto France first told me that he was considering replacing aluminum guide rails with SMA composite on a sunroof roller-blind module, I thought it might be a bit of a challenge, but worth taking the chance," notes Henri- Paul Benichou, Polyscope's sales and business development manager. "is innovative application proved to be a technical and industrial success, providing numerous benefits for suppliers, for Renault and for Renault's customers." Contributing writer Peggy Malnati covers the automotive and infrastructure beats for CW and provides communications services for plastics- and composites-industry clients. peggy@compositesworld.com Read this article online | short.compositesworld.com/scenic PRESENTER PRESENTED BY EVENT DESCRIPTION: Before assembling or delivering composite components, they will run through quality control. Due to its high sensitivity in identifying mechanical phase transitions like the glass-transition, dynamic-mechanical analysis (DMA) is the standard in post-process quality assurance. DMA can tell you if the resin cures in regions where differential scanning calorimetry struggles with the detection. is webinar will introduce the measurement principle of dynamic-mechanical analysis and show how to perform quality assurance in the composite sector. PARTICIPANTS WILL LEARN: • Measurement principle of DMA • What DMA can tell you about composite quality • How DMA fits in line with composite process control and material development Dynamic-mechanical analysis— the standard for post-process quality assurance in composite manufacturing November 8, 2018 • 11:00 AM ET REGISTER TODAY FOR WEBINAR AT: SHORT.COMPOSITESWORLD.COM/NETZSCH11 netzsch.com JOHN ERNE

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