公开(公告)号：US12023730B2

公开(公告)日：2024-07-02

申请号：US17417461

申请日：2019-12-18

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi Fukunaga ,  Toshio Kaku ,  Hiroki Furukawa ,  Takuya Okada

IPC: B22D41/18 ,  B22D11/18

CPC classification number: B22D41/18 ,  B22D11/18 ,  B22D41/186

Abstract: The precision of grasping or controlling backpressure around a gas discharge portion in a stopper for continuous casting can be improved with a stopper for continuous casting which includes a cavity for conveying gas in a vertical direction center of the stopper, one or a plurality of gas discharge holes passing through from the cavity to the outside in a distal center or a side surface of a reduced-diameter region including a fitted portion to a lower nozzle, and a pressure control component in a part of an area above the gas discharge hole within the cavity.

公开(公告)号：US10220438B2

公开(公告)日：2019-03-05

申请号：US15121180

申请日：2015-02-05

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Takuya Okada ,  Takahiro Kuroda

IPC: B22D11/103 ,  B22D41/56 ,  B22D41/50 ,  B22D11/10

Abstract: An immersion nozzle for use with an immersion nozzle replacement apparatus, capable of preventing crack formation due to the presence of a neck region. The immersion nozzle includes a nozzle body, a flange, and a metal casing. The nozzle body is formed such that a region of an outer peripheral surface thereof located above a point of power of an upward supporting force from a supporting device extends vertically up to an upper edge of the nozzle body without any dimensional change with respect to an central axis of an inner bore of the nozzle body. The outer peripheral surface region is not joined to the metal casing.

公开(公告)号：US10682696B2

公开(公告)日：2020-06-16

申请号：US16077587

申请日：2017-02-07

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi Fukunaga ,  Takahiro Kuroda ,  Tatsuya Oouchi ,  Takuya Okada ,  Akira Ootsuka

IPC: B22D41/08 ,  B22D41/56 ,  B22D11/10 ,  B22D41/50

Abstract: In the method for replacing an immersion nozzle while pushing out a used immersion nozzle by a new immersion nozzle, in order to minimize leakage of molten steel during the replacement, to enable the use of a shaped joint sealer in a joint interface, and to ensure high sealability, a concave portion is formed on the new immersion nozzle's upper plane so as to include a nozzle hole, and the shaped joint sealer is mounted in this concave portion. The immersion nozzle's upper plane is caused to slide while being pressed to the upper nozzle's lower plane.

公开(公告)号：US10799950B2

公开(公告)日：2020-10-13

申请号：US16070934

申请日：2016-11-09

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi Fukunaga ,  Takahiro Kuroda ,  Takashi Sadano ,  Takuya Okada ,  Arito Mizobe

IPC: B22D41/50 ,  B22D11/10

Abstract: A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.