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61. 发明专利

JPH03230849A CONTINUOUS CASTING APPARATUS FOR CASTING STRIP 失效
公开(公告)号：JPH03230849A
公开(公告)日：1991-10-14
申请号：JP2213990
申请日：1990-02-02
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： TANAKA SHIGENORI , MIZUCHI ISAO , OMATSU YASUHIKO , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To manufacture a cast strip having excellent surface characteristic by pushing divided brushing rolls to a cooling drum and the other divided brushing rolls to gap between the above divided brushing rolls. CONSTITUTION:While cooling and solidifying molten metal poured into pouring basin part 15 with the cooling drums 11A, 11B, the cast strip 15 is produced. Then, the brushing rolls 1A, 1B divided in the axial direction thereof under condition of contacting with the surface of cooling drums 11A, 11B, are independently pushed on the surface of cooling drums 11A, 11B. Further, the other brushing rolls 10A, 10B, 10C divided in the axial direction thereof at near the brushing rolls 1A, 1B, are independently pushed on the cooling drums 11A, 11B. By this method, the development of uneven polishing on the cooling drum surface can be eliminated.

62. 发明专利

JPH0366456A APPARATUS FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH0366456A
公开(公告)日：1991-03-22
申请号：JP20022789
申请日：1989-08-03
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： FURUYA TAKASHI , TANAKA SHIGENORI , SUICHI ISAO , NAKAJIMA HIROYUKI , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To make contamination difficult-to-stick by arranging fine dimples on surfaces of rotary cooling drums, specifying diameter, space and depth of the dimples and distributing the dimples under condition of making lines, which are inclined at the specific angle to the drum axes and lined up in the specific interval, as basic line. CONSTITUTION:The dimples 9 are arranged on the surface of rotary cooling drums 1, 2 for mold and the diameter and interval of the dimples 9 are each

63. 发明专利

JPH0199752A POURING DEVICE FOR TWIN BELT TYPE CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPH0199752A
公开(公告)日：1989-04-18
申请号：JP25619887
申请日：1987-10-13
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： ITANO SHIGEO , YOKOTE HIROMI , AKITA HIDEKI , YAMANE TAKASHI , NISHIMURA OSAMU
IPC分类号： B22D11/06
摘要： PURPOSE:To uniformly pour molten metal toward direction and to prevent crack caused by heat stress by setting one pair of bending refractory plates as facing which the upper part is bent along the top roll and the lower part is flat. CONSTITUTION:One pair of the refractory plates 10, 10' are bent along the top rolls 3, 3' at the upper part 10a, 10'a flattened at the lower part 10b, 10'b and extended downward between one pair of belts and set as facing. Molten metal from tundish nozzles 11, 11' is spread as layer-state to width direction on the surface of bending upper parts 10a, 10'a of the refractory plates 10, 10' and flowed downward on the refractory plates 10, 10' to introduce to the pouring face 8. By this method, uniform pouring of the molten metal is executed to width direction. Further, as the refractory plates 10, 10' are not restrained to both sides of width direction, the construction, which the heat stress is easily released and the crack is difficult to occur, is obtd.

64. 发明专利

JPS62156049A PRODUCTION OF THIN HOOP METAL 失效
公开(公告)号：JPS62156049A
公开(公告)日：1987-07-11
申请号：JP29303185
申请日：1985-12-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： HAMANAKA SUKEAKI , KADOI JUN , KAI TOSHIO , YAMANE TAKASHI , AOKI YOSHIAKI , WATANABE TETSURO
IPC分类号： B22D11/06
摘要： PURPOSE:To improve productivity and to reduce production cost by arranging a bendable caterpillar plate dipped in and drawn out from molten metal and also a rubbing plate which always keeps surface contact with a pattern nicking surface of the caterpillar plate. CONSTITUTION:Rolls 4a, 4b in the molten metal 3 in a molting vessel 1 equipped a heating means 2 and also roll 4c in the air are arranged, and the bendable caterpillar plate 5 nicked grooves 5a, 5b by the prescribed pattern is suspended and turned as looping. Further, the rubbing plate 7 and a pushing plate 8, in which arrange water cooling cavities, are arranged at the drawing-out side of the caterpillar plate 5 from the molten metal surface 3a, to hold on the caterpillar plate 5. When the caterpillar plate 5 is shifted up as sliding between the rubbing plate 7 and the pushing plate 8, the molten metal filled up in the pattern grooves 5a, 5b is ascended and cooled as turning together with the caterpillar plate 5, and the thin plate metal 10 is continuously produced at high speed. Therefore, improvement of the productivity and also reduction of production cost are obtd.

65. 发明专利

JPS62124052A OPERATION METHOD FOR SHEET CONTINUOUS CASTING 失效
公开(公告)号：JPS62124052A
公开(公告)日：1987-06-05
申请号：JP26144785
申请日：1985-11-22
申请人： MITSUBISHI HEAVY IND LTD
发明人： YOSHIHARA AKIYO , YAMAMOTO KEIICHI , YAMANE TAKASHI , HANANAKA KATSUYASU
IPC分类号： B22D11/06 , B22D11/119
摘要： PURPOSE:To prevent a break out accident caused by over-solidification of a casting billet by arranging a starting plate at a discharging hole of a casting nozzle, and reducing a pressure in the casting nozzle to pour as a steady flow for a molten metal casting to a drum surface at starting of pouring. CONSTITUTION:The molten metal 4 in a tundish 1 is poured into the casting nozzle 2 by opening of a stopper 3 and is poured to the drum 6 surface through a filter 5. The starting plate 7 is provided to be covered on an aperture part of the filter 5 and to be melted down by bringing into contact with the molten metal for about 1min. Therefore, the molten metal is filled up in the casting nozzle 2 till melting down of the starting plate 7 and a uniform pouring from the filter 5 is obtained. Further, as an atmospheric pressure in the casting nozzle 2 is reduced from a suction hole 8 and is kept on the reducing pressure till filling up of the molten metal 4 therein 2, the uniform pouring is obtained.

66. 发明专利

JPS6240955A CONTINUOUS CASTING DEVICE FOR THIN SHEET 失效
公开(公告)号：JPS6240955A
公开(公告)日：1987-02-21
申请号：JP18091785
申请日：1985-08-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the intrusion of the solidified shell of a molten metal formed in the meniscus part into a steel ingot in the stage of producing a thin sheet-like steel ingot from the molten metal by two rotary drums by disposing heatint refractories to the molten metal meniscus part of the rotary drums and applying ultrasonic oscillation to the molten metal between the drums. CONSTITUTION:The molten metal 4 is supplied from a tundish 5 by an immersion nozzle 6 to the space formed of the internally water cooled rotary drums 1, 1' and stationary gates 2, 2' and the thin sheet-like steel ingot 3 is drawn out by rotating the drums 1, 1' backward. The refractories 9 which can be internally heated are disposed to the meniscus part of the molten metal in the above-mentioned space between both drums and the molten metal is stirred by an electromagnetic stirrer 8; at the same time, the ultrasonic oscillation is applied to the molten metal by an ultrasonic oscillator 10. The surface solidified shell is made hardly formable on the molten metal is the meniscus part by the presence of the heated refractories. Even if such shell is formed, the shell connects to the solidified shell formed on the surfaces of the drums 1, 1' and is no intruded into the thin sheet-like steel ingot. The quality of the steel ingot 3 is thus not affected by such solidified shell.

67. 发明专利

JPS6221444A CONTINUOUS CASTING METHOD FOR THIN SHEET 失效
公开(公告)号：JPS6221444A
公开(公告)日：1987-01-29
申请号：JP16005185
申请日：1985-07-22
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06 , B22D11/08
摘要： PURPOSE:To permit stable casting right after the start of casting and to improve the yield of a thin sheet by disposing a dummy bar on drum surfaces which contact with the molten metal in the space formed of drums and stationary gates and sticking heat insulating or exothermic materials to the surface thereof then casting the molten metal. CONSTITUTION:The heat insulating materials 9 consist of heat insulating materials for the molten metal, heating pads or ceramic fibers and are stuck by an adhesive agent, etc. to the dummy bar 6 on the drum 1, 1' surfaces. Since the progresion of the solidification of the molten metal poured in to the space formed of the drums 1, 1' and the stationary gates 2, 2' is prevented by the above-mentioned materials, the molten metal in said space can be held until the amt. thereof attains a stationary state. The stable casting thus executed from the initial period of casting.

68. 发明专利

JPS61232043A CONTINUOUS CASTING METHOD FOR THIN SHEET 失效
公开(公告)号：JPS61232043A
公开(公告)日：1986-10-16
申请号：JP7109085
申请日：1985-04-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06 , B22D11/20
摘要： PURPOSE:To make easy the starting of casting and the restarting of casting after breakout by bringing drums into tight contact with each other prior to the start of casting then opening the space between the drums at a specified speed and adjusting the rotating speed of the drums upon starting of pouring. CONSTITUTION:The space between one water-cooled casting drum 1'' and the other water-cooled casting drum 1 is adjusted by an oil pressure, etc. The space quantity is measured by a sensor 15 and the measured displacement quantity is converted to an electric signal by a displacement converter 12. The relation between the space quantity and the displacement is controlled by a controller 13. The output is outputted by an output amplifier 14 and a driving source 10 is operated to control the rotation of the drums 1, 1''. The molten metal is therefore poured at a specified flow rate from a tundish and at the same time the drums open from the initial tight contact state and rotate to provide the prescribed space and rotating speed. The mass-balance with the molten metal supplied thereto is thus attained. The need for mounting a dummy bar to be used in the initial period is thereby eliminated and the recasting after the breakout is made possible.

69. 发明专利

JPS61165255A POURING DEVICE IN CONTINUOUS CASTING DEVICE 失效
公开(公告)号：JPS61165255A
公开(公告)日：1986-07-25
申请号：JP408085
申请日：1985-01-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： YOSHIHARA AKIYO , YAMAMOTO KEIICHI , YAMANE TAKASHI , SEZE SHINJI , TANIE MASAFUNE
IPC分类号： B22D11/06 , B22D11/10 , B22D11/103
摘要： PURPOSE:To provide the titled device with which a molten metal is supplied into a casting mold part uniformly in the transverse direction of drums and an ingot having a good surface characteristic is obtd. by immersing respectively a pouring nozzle provided with molten metal discharge ports to the side faces at the top end and baffle plates into the molten steel in the mold. CONSTITUTION:The molten steel flow supplied from the molten steel discharge port 6 on the side faces at the top end of the pouring nozzle 1 is striken against the baffle plates 5, by which the flow is relieved; at the same time, the molten steel is dispersed in the transverse direction of the drums 3, 3'. Since the nozzle 1 is immersed into the molten steel, the molten steel surface between the nozzle 1 and the plates 5 is waved by the molten steel flow. However, the molten metal surface between the drums 3, 3' and the plates 5 is hardly affected by the molten steel flow and the molten steel surface in these parts is still. As a result, the disturbance of the meniscus of the molten steel is eliminated and the ingot having the good surface characteristic is obtd.

70. 发明专利

JPS61162248A METHOD AND DEVICE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS61162248A
公开(公告)日：1986-07-22
申请号：JP210885
申请日：1985-01-11
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMANE TAKASHI , YASUI TOYOAKI
IPC分类号： B22D11/06 , B22D11/08
摘要： PURPOSE:To permit the stable start of a continuous casting operation without a breakout accident in a twin drum type constinuous casting device by winding preliminarily thin sheets united to a dummy bar head on the cooling surfaces of two water cooling drums at the start of casting. CONSTITUTION:The thin steel sheets 9, 9' united to the dummy bar head 8 are wound around the cooling peripheral surfaces of the two water cooling drums 1, 1' prior to the start of casting and are pressed to the surfaces of the drums 1, 1' by plural hold-down rolls 10, 10 in the twin drum type continuous casting device consisting of said drums 1, 1'. A molten steel is poured from a tundish nozzle 6 into the casting space constituted of both drums and refractory gates 2, 2' provided to both end faces of the drums and both drums are rotated to produce the steel ingot while the head 8 is lowered. Since the sheets 9, 9' are wound around both drums, the solidified shell formed in the initial period of casting is washed by the molten steel poured into the casting space and the stable start of the continuous casting operation is made possible without generating the breakout.

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