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Search: L773:9729902305

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1.
  • Rännar, Lars-Erik (author)
  • Efficient Cooling of FFF Injection Molding Tools with Conformal Cooling Channels, : An Introductory Analysis
  • 2003
  • In: Advanced research in virtual and rapid prototyping. - Leiria : Escola Superior de Tecnologia e Gestão. - 9729902305 ; , s. 433-437
  • Conference paper (other academic/artistic)abstract
    • Typically, the conventional machining techniques for the design of cooling layouts, in injection molding tools, are drilled straight bores placed around the tool cavity. Ejector pins, parting planes, cores, etc., make it impossible to gain an optimal cooling effect and the methods to improve the cooling, such as baffles and bubblers, are rather time-consuming and expensive. A numerical comparison of the efficiency between conventional cooling channel layouts, using straight holes and a baffle, and a free-form fabricated (FFF) layout was carried out considering cooling time and dimensional stability. The analyses showed a considerable improvement in both cooling time and dimensional stability in favor of FFF cooling channels. A reduction of the cycle time up to 67% was achieved with preserved, and even better tolerances on the dimensional stability.
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2.
  • Wernemyr, Claes, 1949, et al. (author)
  • Users’ experience of a virtual reality architectural model compared with users’ experience of the completed building
  • 2003
  • In: Proceedings of the 1st international conference on advanced research in virtual and rapid prototyping. ; , s. 363-370, s. 363-370
  • Conference paper (peer-reviewed)abstract
    • This research investigated how the employees of a company experienced a VR-model of an office building that was to be their future work place and how that VR-experience com¬pared with the employees’ experience of the completed building. About two years after the VR-showings the building was completed and the staff had moved into the building. The results for the employees who saw the VR-presentation for the Semantic environment de¬scrip¬tion scale (SMB) comparing the experiences of the VR-model with the experiences of the completed real building suggested that the experience of the VR-model gave a fairly accurate representation of the experience of the real building However, the reactions to the VR-model were more appreciative after the VR-show as compared with when the VR-model was compared with the real building.
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