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1. 发明专利

JPH11188462A TUNDISH NOZZLE EXCHANGING DEVICE 失效
公开(公告)号：JPH11188462A
公开(公告)日：1999-07-13
申请号：JP36700197
申请日：1997-12-25
申请人： TOSHIBA CERAMICS CO , SUMITOMO JUKIKAI CHUTAN KK
发明人： HARA KIYONORI , KAWAMURA TOSHIO , HAYASHI KENZO , KITAGAWA HIROYUKI , SAIGO TADAO
IPC分类号： B22D11/10 , B22D41/56
摘要： PROBLEM TO BE SOLVED: To provide a tundish nozzle exchanging device which can facilitate an accurate leveling operation on the bottom end face of an upper nozzle. SOLUTION: This tundish nozzle exchanging device comprises a lower nozzle 17, a blank nozzle 18, or an immersion nozzle being energized upwards, which can be exchanged by a horizontal extrusion means and be slid via upper end faces 22, 23, and 24, on a lower end face 12 of an upper nozzle 8, the bottom end part of which is extruded downward and which is mounted to a molten metal outlet 3 of a tundish 1. In this case, a hoop ring 14 is thermally inserted in a periphery of the bottom end part of a nozzle body 10 of the upper nozzle, and the upper end face can be abutted to the bottom face of a base plate 7 mounted to the bottom of an outer iron skin 2 of the tundish, so that a positioning ring 15 is fixedly engaged on the periphery of the ring 14.

2. 发明专利

JPH11347716A DEVICE FOR DISCHARGING MOLTEN METAL 失效
公开(公告)号：JPH11347716A
公开(公告)日：1999-12-21
申请号：JP15315098
申请日：1998-06-02
申请人： TOSHIBA CERAMICS CO
发明人： KATO HIDEAKI , HARA KIYONORI , HIRANO TAKAAKI , KAWARADA KOJI , OKADA KEIKO
IPC分类号： B22D11/10 , B22D41/42
摘要： PROBLEM TO BE SOLVED: To provide a molten metal discharging device, in which there is no fear that a molten metal passing-through hole in a fixed plate is clogged with the molten metal, and the air is prevented from being sucked from the outer part due to the negative pressure in the molten metal passing-through hole caused by the flowing of the molten metal. SOLUTION: In the actual working surface 7 of a sliding plate 5 for closing the molten metal passing-through hole 2 in the fixed plate 3, a blowing hole 9 for blowing inert gas, is disposed. During the execution of opening/closing process of the molten metal passing-through hole 2 with the sliding plate 5, and at the time of fully stopping the molten metal passing-through hole 2 by stopping the sliding, the blowing hole 9 is arranged in the actual working surface 7 so as to blow the inert gas into the molten metal passing-through hole 2 from the blowing hole 9.

3. 发明专利

JPH1024359A NOZZLE FOR SLIDE GATE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH1024359A
公开(公告)日：1998-01-27
申请号：JP8555997
申请日：1997-03-21
申请人： TOSHIBA CERAMICS CO
发明人： MUKOYAMA KENICHI , SUGIURA SADANOBU , HIRANO TAKAAKI , KATO HIDEAKI , HARA KIYONORI , MORITA OSAMU , OKADA KEIKO
IPC分类号： B22D41/32 , C04B35/66
摘要： PROBLEM TO BE SOLVED: To eliminate the difference in an iron shell fitting work among individuals, to improve the filling density, to secure the high expansion coefficient, to extend the durable service life and to reduce the manufacturing cost. SOLUTION: In a nozzle for a slide gate having the protecting iron shell 2, a nozzle body 1 is formed with dryship and the protecting iron shell 2 is fitted to the nozzle body 1 by using a self-flow castable refractory 6. In the manufacturing method of the nozzle for the slide gate having the protecting iron shell 2, the nozzle body 1 is formed with the dryship and the protecting iron shell 2 is set to the outside of the nozzle body 1 and the self-flow castable refractory 6 is allowed to flow into the gap 4 between both of the nozzle body and the protecting iron shell without vibration.

4. 发明专利

JPH09206921A NOZZLE FOR SLIDE GATE 失效
公开(公告)号：JPH09206921A
公开(公告)日：1997-08-12
申请号：JP3871396
申请日：1996-02-01
申请人： TOSHIBA CERAMICS CO
发明人： MUKOYAMA KENICHI , SUGIURA SADANOBU , KATO HIDEAKI , HARA KIYONORI , MORITA OSAMU , TAZOE KEIKO
IPC分类号： B22D41/32 , B22D11/10 , B22D41/34
摘要： PROBLEM TO BE SOLVED: To restrain a rise of temp. in a protecting shell enclosing the main body of a lower nozzle by arranging a heat insulating material having a prescribed characteristic on the outer peripheral side surface in the lower nozzle for the sliding gate. SOLUTION: The main body 3b of the lower nozzle is composed of Al2 O3 -C material, the outer peripheral side surface and lower bottom surface are coated with the heat insulating material 6, and further a protecting shell 3d is installed via a mortal 3c on the periphery. The material of the heat insulating material 6 is composed of Al2 O3 -SiO2 , Al2 O3 -SiO2 -C, or Al2 O3 -SiO2 -CaO. The thermal conductivity is selected from the range of 0.05-1.5Kcal/m.hr. deg.C and the thickness is specified to be 0.2-3mm.

5. 发明专利

JPH06218508A DIPPING NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH06218508A
公开(公告)日：1994-08-09
申请号：JP1275693
申请日：1993-01-28
申请人： TOSHIBA CERAMICS CO
发明人： HAYAMIZU KUNIO , KAWASHIMA TERUHISA , ANDO MASAHIRO , HARA KIYONORI , MOCHIZUKI YOICHIRO
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To reduce the segregation of the ingot and to improve the quality by providing a conical projection or a truncated conical projection at the molten pool part at the bottom in the nozzle. CONSTITUTION:An in-nozzle hole 2 is formed in a nozzle body 1, the molten steel is flowed in the direction of the arrow 5, and discharged from a molten steel discharging hole 3 into a mold. A conical or a truncated conical projection 6 is provided at a molten pool part 4 at the bottom of the in-nozzle hole 2. The inclination at the top of the conical or a truncated conical projection 6 is set in the range of 30-60 deg. to the perpendicular line. The diameter of the bottom surface of the projection 6 is 25-95% of the inner diameter of the nozzle bottom part. The height of the truncated conical projection is >=1/2 of the height of the conical projection before truncation. This constitution prevents the accident such as falling or peeling of the lower part of the nozzle at the initial stage of casting.

6. 发明专利

JPH11347719A PRODUCTION OF NOZZLE OF TUNDISH NOZZLE EXCHANGE DEVICE 失效
公开(公告)号：JPH11347719A
公开(公告)日：1999-12-21
申请号：JP15824998
申请日：1998-06-05
申请人： TOSHIBA CERAMICS CO
发明人： TAZOE KEIKO , HARA KIYONORI , TAKIGAWA HITOSHI , HIRANO TAKAAKI , KATO HIDEAKI , MUKOYAMA KENICHI , YAMADA HIROSHI , KAWARADA KOJI
IPC分类号： B22D11/10 , B22D41/56
摘要： PROBLEM TO BE SOLVED: To provide a production method for a nozzle of a tundish nozzle exchange device producible in a reduced time and process. SOLUTION: An inner nozzle member 13 produced beforehand is erected on a bottom face 4 having a required flatness of a steel lower die 3 in a casting jig 1 with setting one end down, a metal case 14 is fixed with setting one end down so as to center the inner nozzle, then, a castable refractory is cast between the inner nozzle and the metal case.

7. 发明专利

JPH11207457A UPPER NOZZLE FOR SLIDING GATE 失效
公开(公告)号：JPH11207457A
公开(公告)日：1999-08-03
申请号：JP2520798
申请日：1998-01-23
申请人： TOSHIBA CERAMICS CO
发明人： MASUDA TAKESHI , YAMADA HIROSHI , HARA KIYONORI , HIRANO TAKAAKI
IPC分类号： B22D11/10 , B22D41/50
摘要： PROBLEM TO BE SOLVED: To prevent the leakage of molten steel and to achieve the miniaturization of a refractory for sliding gate according to the miniaturization of the shape of an upper nozzle by arranging a projecting part for positioning, engaged with the lower outer wall or the refractory of a molten metal holding vessel, at the outer periphery at the lower end of the upper nozzle. SOLUTION: In the case of inserting the upper nozzle into a well block 1 in a molten metal holding vessel of a tundish or a ladle, etc., from the lower part, the projecting part 6 for positioning the upper nozzle 2 is engaged by hitting to the lower outer wall 7 or the refractory 11 or the recessed part 10 formed therein in the molten metal holding vessel and the upper nozzle 2 is not inserted into deeper position than the engaging position of the well block 1 and is held at the fixed position in the well block 1. In this way, the interval between the lower surface of the upper nozzle 2 and the upper plate 3 of the sliding gate can be held constant. Therefore, the interval between the lower surface of the upper nozzle 2 and the upper plate 3 of the sliding gate is not enlarged longer than required and small quantity of mortar is enough.

8. 发明专利

JPH10277711A OXIDATION PREVENTING METHOD FOR FITTING PART OF STOPPER HEAD AND IMMERSION NOZZLE, OXIDATION PREVENTING MATERIAL THEREFOR AND FITTING PART OF STOPPER HEAD AND IMMERSION NOZZLE COATED THEREWITH 失效
公开(公告)号：JPH10277711A
公开(公告)日：1998-10-20
申请号：JP9959497
申请日：1997-04-03
申请人： TOSHIBA CERAMICS CO
发明人： HARA KIYONORI , MORITA OSAMU , KATO HIDEAKI
IPC分类号： B22D41/18 , B22D11/10
摘要： PROBLEM TO BE SOLVED: To prevent the rubbing off and peeling of coating material for preventing the oxidation at the time of executing the centering while rubbing the fitting surfaces together by applying grphitic lubricant on their one or both fitting surfaces of a stopper head for tundish or an immersion nozzle. SOLUTION: On the fitting part 2 of the immersion nozzle or the tip part 1 of the topper head, the coating material for preventing the oxidation having Al2 O3 , SiO2 , R2 O, R2 O3 , etc., as components and using organic material or inorganic material as binder is applied or coated with spraying, etc. After drying the coating material for preventing the oxidation, the graphitic lubricant containing >=30% graphite and having extremely low friction coefficient is applied. The position to be coated is set to one or both of the fitting part 2 of the immersion nozzle or the tip part 1 of the stopper head. By this method, the centering of the fitting part 2 of the immersion nozzle and the tip part 1 of the stopper head is effectively executed and the oxidation and the abnormal erosion of refractories at the time of casting are prevented and the flow rate control of the molten steel is facilitated.

9. 发明专利

JPH08132191A ALUMINUM-CARBON BASE NOZZLE REFRACTORY FOR CASTING 失效
公开(公告)号：JPH08132191A
公开(公告)日：1996-05-28
申请号：JP26975094
申请日：1994-11-02
申请人： TOSHIBA CERAMICS CO
发明人： HARA KIYONORI , KATO HIDEAKI , SUGITA KIYONARI , OOYA SATOSHI , HAYASHI KENZO , MORITA OSAMU
IPC分类号： B22D41/32 , B22D11/10 , B22D41/54 , C04B35/103
摘要： PURPOSE: To improve the wear resistance of a refractory and to prevent the brittleness caused by oxidation by using the specific ratios of alumina -graphite and alumina -amorphous carbon to the refractory constituting an immersion nozzle, etc. CONSTITUTION: The refractory is constituted with the immersion nozzle 4 or the tuyere part 7 of a long nozzle 6 or the sliding part 9 of a slide gate plate 2. The refractory composed of the mixed material of the alumina-graphite and the aluminaamorphous carbon used therein is made to be by wt.% of 20-40% alumina-graphite and 60-80% alumna-amorphous carbon. Further, in the raw material mixed material composed of the alumina-graphite and the alumina- amorphous carbon, the total Al2 O3 is made to be 50-90wt.%, the total carbon is made to be 10-35wt.% and the total SiO2 is made to be

10. 发明专利

JP2004255432A AIR-LEAK PREVENTIVE AGENT FOR REFRACTORY FOR CASTING 审中-公开
公开(公告)号：JP2004255432A
公开(公告)日：2004-09-16
申请号：JP2003050283
申请日：2003-02-27
申请人： TOSHIBA CERAMICS CO
发明人： HIRANO TAKAAKI , HARA KIYONORI
IPC分类号： B22D11/10 , B22D11/106 , B22D41/36 , C04B35/66
摘要： PROBLEM TO BE SOLVED: To provide an air-leak preventive agent for refractory for casting which has excellent workability, adhesiveness, and air-tightness under high temperature and can suitably be used for joining part etc., of each refractory member constituted of a slide gate plate etc. SOLUTION: The air-leak preventive agent in which 50-60 wt% feldspar, 40-50 wt% potassium water glass, and 0-50 wt% anhydrous borax are blended, is coated on the joining part etc., of the refractory member for casting. COPYRIGHT: (C)2004,JPO&NCIPI

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