New Partition Technique for Two-chamber Pressure Casting Unit for Titanium.

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  • WATANABE Kouichi
    Dental Materials and Technology, Faculty of Dentistry, Niigata University
  • OKAWA Seigo
    Dental Materials and Technology, Faculty of Dentistry, Niigata University
  • KANATANI Mitsugu
    Dental Materials and Technology, Faculty of Dentistry, Niigata University
  • NAKANO Syuji
    Dental Materials and Technology, Faculty of Dentistry, Niigata University
  • MIYAKAWA Osamu
    Dental Materials and Technology, Faculty of Dentistry, Niigata University
  • KOBAYASHI Masayoshi
    Center for Instrumental Analysis, Niigata University

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説明

Although titanium has been widely used in prosthetic appliances, such as cast removable partial denture frameworks, high quality castings are still difficult to obtain. This study proposes a new partition technique using a metal foil for improving castability of a two-chamber pressure casting unit. The metal foil was formed beforehand to bring it in contact with the mold crucible wall so that no clearance was left behind it. Using this formed foil, the mold cavity can be completely isolated from the upper chamber and can be maintained in a vacuum even after the rupture of the foil. Accordingly, a large casting force is generated very quickly, and as a result, castability is expected to be significantly improved. This expectation was confirmed by the experiments using wax patterns including thin plate and mesh plate.

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