Tokai University Educational System

Sharp Kabushiki Kaisha Corporation

Nec Tokin Corporation

Union Seimitsu Co., Ltd.

Gonda Metal Industry Corporation Ltd.

Gonda Metal Industry Co., Ltd.

Kazunari Yoshida

Toshio Haga

Yoshio Gonda

Kazuo Sugiyama

Masanobu Tanigawa

Tadashi Tashima

Hideo Takaara

Yoshio Shindoh

Gentaro Gonda

Masahiro Nakanishi

Yu Kagami

A manufacturing method for a cast bar and tube made of a magnesium alloy, includes steps of preparing a manufacturing device; depressurizing a vacuum chamber through a depressurization device; heating a vicinity of an opening of a hollow tube; inserting the opening of the hollow tube into a molten metal; switching a valve member to be open; introducing the molten metal into a cylindrical part, and filling the cylindrical part with the molten metal; cooling the hollow tube; and continuously vibrating the hollow tube until completing solidification of the molten metal in the cylindrical part.

Method for manufacturing a cast bar and tube made of a magnesium alloy

A fastening body structure having a screw member which uses a module screw having a countersunk head and a washer made of a shape memory alloy. With this structure, the washer does not expand even if subjected to large fastening force and the washer can be easily removed when the screw fastening is released. The fastening body structure fastens and fixes a desired part to the installation section by using the screw member having the module screw and the washer. The module screw has a male screw used as a pair with a female screw thread section formed in the installation section. The washer has an inner diameter corresponding to the module screw. An irregular surface section is formed on a slope surface at the lower part of the head of the module screw or on the surface of the washer that makes contact with the screw.

Fastening body structure

A screw attachment (&#x2033;) disposed around a fastening piece () secured to a main fastening body (), the screw attachment sandwiched between a head () of the fastening piece and a securing object () so that the screw attachment bears a securing force of the fastening piece to press the securing object. The screw attachment includes a pair of arms () made of a shape restoring material. Each arm has a fore end, and the fore ends are joined to each other with an adhesive material that is softened when heated. The arms expands radially such that the screw attachment is released from the head of the fastening piece when heat or force is applied to the arms.

Screw attachment, fastening assembly having screw attachment, and process of releasing fastening assembly

A magnesium metal thin plate manufacturing method includes at least a casting process of supplying a molten metal obtained by melting a magnesium metal to a molten metal bath, drawing out the molten metal, supplying the molten metal into the gap between a pair of casting rolls composed of at least a pair of casting upper roll and casting lower roll, applying pressure to the molten metal, and casting a plate solidified at a predetermined temperature and having a predetermined thickness, and a rolling process of rolling the cast plate by means of at least a pair of rolling rolls by applying pressure thereto to manufacture a magnesium metal thin plate. With the above arrangement, there can be provided a magnesium metal thin plate manufacturing method and manufacturing apparatus that can effectively manufacture a magnesium metal thin plate by plastic working without requiring a heat energy generation step again in rolling.

Method and apparatus for producing thin magnesium based alloy plate

Growing community of inventors

Kanagawa, Japan

Kazunari Yoshida