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    Thin, narrow tube and drawing apparatus and drawing method for manufacturing the same
    69.
    发明授权
    Thin, narrow tube and drawing apparatus and drawing method for manufacturing the same 有权

    公开(公告)号：US11065135B2

    公开(公告)日：2021-07-20

    申请号：US16358232

    申请日：2019-03-19

    申请人： National Institute of Advanced Industrial Science and Technology

    发明人： Kotaro Hanada ,  Kunio Matsuzaki

    IPC分类号： B21C1/24 ,  A61F2/82 ,  A61L31/02 ,  B21B17/04 ,  A61L31/14 ,  C21D7/00 ,  C21D9/08 ,  C22F1/06 ,  C22C1/02

    摘要： Provided is a thin, narrow tube for use in a biodegradable medical device formed from a round tube made of a magnesium material as the base material, in which a desired outer diameter and an inner diameter are provided with good precision over the entire region in a longitudinal direction and a circumferential direction, and the length of biodegradation time can be controlled without changing a material composition. The thin, narrow tube is a thin, narrow tube of a biodegradable medical device, in which the thin, narrow tube is a round tube made of crystals containing magnesium (Mg) having a hexagonal crystal structure, and when the crystals forming the round tube are viewed in a round tube axis direction of the round tube, a hexagonal basal plane (0001) is oriented at a predetermined inclination angle with respect to a circumferential direction perpendicular to a radial direction (a direction from an inner surface to an outer surface) of the round tube.

    DRAWING MACHINE FOR DRAWING TUBES
    70.
    发明申请
    DRAWING MACHINE FOR DRAWING TUBES 审中-公开

    公开(公告)号：US20190201956A1

    公开(公告)日：2019-07-04

    申请号：US16294675

    申请日：2019-03-06

    申请人： Danieli & C. Officine Meccaniche S.P.A.

    发明人： Andrea Angelilli ,  Luca Crespan

    IPC分类号： B21C51/00 ,  B21C1/24 ,  B21C3/14

    CPC分类号： B21C51/00 ,  B21C1/24 ,  B21C3/14

    摘要： A drawing machine (1) for drawing a tube (2), defining a longitudinal axis (Y), comprising a first die (3) for carrying out the drawing of the tube by means of the use of a mandrel (4); a device for varying the inclination (5) of the tube inlet into said first die (3); a second die (6) for carrying out a skin pass operation on the tube, arranged downstream of said first die (3); an in-line system for detecting the eccentricity of the tube; a data processing system (7) for processing signals originating from said detection system and sending input data to said device for varying the inclination (5) of the tube to vary the inclination of the tube so as to correct the eccentricity of the tube in-line; wherein said in-line system for detecting the eccentricity of the tube comprises a first detection head comprising at least three first transducers (8) arranged downstream of said first die (3).