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1. 发明专利

JPH1110300A METHOD FOR SUPPLYING MOLTEN STEEL IN MOLD FOR CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH1110300A
公开(公告)日：1999-01-19
申请号：JP16722397
申请日：1997-06-24
申请人： SUMITOMO METAL IND
发明人： OKA MASAHIKO , HANAZAKI KAZUHARU , KOIDE MASAKAZU , MURAKAMI TOSHIHIKO
IPC分类号： B22D11/18 , B22D11/10
摘要： PROBLEM TO BE SOLVED: To eliminate the error at the time of adjusting a stopper and to accuretely control the surface level of molten steel by changing over the hydraulic pressure in a cylinder for driving a stopper pressing the tip part of the stopper onto an upper nozzle to a lower pressure than that at the time of supplying the molten steel and returning back into the same hydraulic pressure as the pressure at the time of supplying the molten steel after zero-setting the stopper, at the time of zero-setting the stopper before starting the supply of the molten steel. SOLUTION: The stopper 1 for adjusting the molten steel supplying quantity is driven with the cylinder 4 for driving the stopper through a stopper arm 2 and a rod 3 to control the elevating/lowering position thereof. The hydraulic pressure of a pump line (P line) 6 to the cylinder 4 for driving the stopper is changed over into the low pressure or the high pressure with a pressure change-over valve 10. At the time of zero-setting, the cylinder 4 for driving the stopper is driven at the low pressure and the stopper is positioned with a guide valve driven with a stopping motor 5. After zero-setting, the pressure of the pump line (P line) 6 is changed over to the high pressure so as not to damage the response at the time of controlling.

2. 发明专利

JPH1110285A MOLD FOR CONTINUOUS CASTING AND CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH1110285A
公开(公告)日：1999-01-19
申请号：JP16453697
申请日：1997-06-20
申请人： SUMITOMO METAL IND
发明人： MURAKAMI TOSHIHIKO , KOIDE MASAKAZU , MIZUKAMI HIDEO , HANAZAKI KAZUHARU , OKA MASAHIKO
IPC分类号： B22D11/04 , B22D11/055
摘要： PROBLEM TO BE SOLVED: To enable heat extraction performance to be adjusted in a wide range by arranging a plurality of heat extraction adjusting holes toward the casting direction between water passages for cooling and an inner surface of a mold at the upper part of the mold, stopping the water flow into the heat extraction adjusting holes at the time of casting a middle carbon steel to make a hollow part and flowing the water into the heat extraction adjusting holes at the time of casting a low carbon steel. SOLUTION: A plurality of water passages 2 for cooling, is arranged in parallel with the casting direction in the whole periphery of the mold 1, at the back surface of the mold 1. A plurality of heat extraction adjusting holes 4 is arranged in parallel with the casting direction between the water passages 2 for cooking and the inner surface 3 of the mold. The heat extraction holes 4 are arranged in a distance Z1 to Z2 in the casting direction from the upper end of the mold 1 and a distance L from the inner surface 3 of the mold and at the position having a distance M from the perpendicular line lowered to the inner surface 3 of the mold from the water passages 2 for cooling. It is desirable that the diameter of cross section of the heat extraction adjusting hole 4 is 5-10 mm at Z1=50-70 mm, Z2=150-250 mm and L=50-70%×(the distance between the water passage 2 for cooling and the inner surface 3 of the mold).

3. 发明专利

JPH0994635A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH0994635A
公开(公告)日：1997-04-08
申请号：JP25324295
申请日：1995-09-29
申请人： SUMITOMO METAL IND
发明人： MURAKAMI TOSHIHIKO , MATOBA YOSHIYUKI , KOIDE MASAKAZU , KAJIWARA KOJI , TAKATANI KOJI
IPC分类号： B22D11/00 , B22D11/04 , B22D11/055 , B22D11/059 , B22D11/22
摘要： PROBLEM TO BE SOLVED: To prevent the development of surface flaw on a cast slab and to improve a casting velocity by slowly cooling a mold, at the time of continuously casting particularly, a medium carbon steel. SOLUTION: The surface temp. of mold copper plates 1aa, 1ba within 200mm at the lower part from a meniscus is held to 350-550 deg.C. As the concrete means, the mold making thicker the thickness of the mold copper plates 1aa, 1ba within 200mm at the lower part from the meniscus than the thickness of the mold copper plates 1aa, 1ba at the other part, or the mold changing the material of the mold copper plates 1aa, 1ba within 200mm at the lower part from the meniscus to the material at the other part are used or the flowing velocity/temp. of mold cooling water supplied within 200mm at the lower part from the meniscus are changed to the flowing velocity/temp. of the mold cooling water at the other part.

4. 发明专利

JPH0890187A METHOD FOR CONTINUOUSLY CASTING THIN CAST SLAB AND APPARATUS THEREOF 失效
公开(公告)号：JPH0890187A
公开(公告)日：1996-04-09
申请号：JP17588595
申请日：1995-07-12
申请人： SUMITOMO METAL IND
发明人： TAKEUCHI ISAMU , YAMANAKA AKIHIRO , OKAMURA KAZUO , SHIMIZU HIROYASU , KANAZAWA TAKASHI , KUMAKURA SEIJI , KOIDE MASAKAZU , MURAKAMI TOSHIHIKO , WATABE TADAO
IPC分类号： B22D11/124 , B22D11/12 , B22D11/128 , B22D11/16 , B22D11/20
摘要： PURPOSE: To restrain the total accumulated strain to small and to produce a thin cast slab preventing the internal crack even in the case of unsolidified rolling reduction under high speed casting condition by applying the rolling reduction ratio with the rolling rolls at the upstream side at higher than the rolling reduction rate with the rolling rolls at the downstream side. CONSTITUTION: In a continuous casting apparatus, plural pairs of rolling rolls 51 -515 enabling the rolling reduction in each roll pair unit arranged in the interval from just below a mold to the perfect solidification are arranged. In the case of using Pk (k is No. of the rolling roll pair) for the rolling reduction rate per one pair of the rolling roll, the large rolling reduction rate P1 is given to the rolling roll pair 51 at the most upstream side in the continuous casting apparatus, and the rolling reduction rate Pk of the rolling roll pair 5k is gradually reduced. That is, the unsolidified rolling reduction is applied under condition of P1 >=P2 >=P3 ...>=P15 (wherein, it is excluded that all rolling reduction rates are equaled) and thus, the max. value of the total accumulated strain can be restrained to lower than the limited strain and the prevention of the internal crack can be achieved.

5. 发明专利

JPH0847759A METHOD FOR CONTINUOUSLY CASTING WIDE AND THIN CAST SLAB 失效
公开(公告)号：JPH0847759A
公开(公告)日：1996-02-20
申请号：JP18608994
申请日：1994-08-08
申请人： SUMITOMO METAL IND
发明人： KOIDE MASAKAZU , KANAZAWA TAKASHI , MURAKAMI TOSHIHIKO , HIRASHIRO TADASHI , KUMAKURA SEIJI
IPC分类号： B22D11/10 , B22D11/128 , B22D11/20
摘要： PURPOSE:To provide a method for obtaining the aimed thickness of a cast slab while following the change of casting speed at the tip part and also, at the rear end part of the cast slab, in a positively executing method of the rolling reduction to the unsolidified part of the cast slab after the outlet side of a mold in order to produce the cast slab having thinner than the thickness at the outlet side of the mold in the continuous caster. CONSTITUTION:In the casting method with the rolling reduction to the unsolidified part, at the same time of passing a dummy bar head, the constant pressing force is applied to roll group at the time of starting the continuous casting. In the other hand, at the time of completing the continuous casting, the casting speed is lowered and also, the rolling reduction zone is shifted to the mold 3 side in order, and a seal cap 24 is inserted into the cast slab 5 in the interval when the rear end part of the cast slab is in the mold, or dummy shell 44 is inserted in the mold 3 to execute the rolling reduction together with the dummy shell 44 at the bottom part.

6. 发明专利

JPH03238062A AIR-LIQUID SPRAY NOZZLE 失效
公开(公告)号：JPH03238062A
公开(公告)日：1991-10-23
申请号：JP3312190
申请日：1990-02-13
申请人： SUPUREEINGU SYST JAPAN KK , SUMITOMO METAL IND
发明人： KUZUMI YASUHIRO , HASHIO MORINORI , KOIDE MASAKAZU , SAKUMA KATSUMI
IPC分类号： B22D11/124 , B05B7/04
摘要： PURPOSE:To well spray an air-liquid mixture by mounting a nozzle part having a jet orifice to a mixer and providing a control orifice to an air source capable of changing an air flow rate. CONSTITUTION:In a mixer 1, a water stream collides with the air stream flowing along the center axis thereof and, at this time, water is dropped to flow to a nozzle part 2 while carried by the air stream and discharged from a jet orifice 5 with a spray angle theta and a spray pattern. When the size of a material to be treated is reduced at the time of secondary cooling work, the air feed pressure to a control air introducing part 7 is increased according to the reduction degree of the size of the material by a pressure control valve 20 and air is injected with an air flow rate corresponding to the air feed pressures from control orifices 6, 6a. Whereupon, the spray angle theta from the orifice 5 is narrowed and a spray pattern is narrowed according thereto. By this constitution, proper spray action can be always imparted.

7. 发明专利

JPS6328701B2 失效
公开(公告)号：JPS6328701B2
公开(公告)日：1988-06-09
申请号：JP3954581
申请日：1981-03-20
申请人： SUMITOMO METAL IND
发明人： KOIDE MASAKAZU , TOKUDA MAKOTO , OGATA WATARU , FUKUMOTO KENZO
IPC分类号： B22D27/02 , B22D11/04 , B22D11/055 , B22D11/10 , B22D11/115

8. 发明专利

JPS61180653A CASTING METHOD OF METAL BY TWIN BELT CASTER 失效
公开(公告)号：JPS61180653A
公开(公告)日：1986-08-13
申请号：JP268085
申请日：1985-01-11
申请人： SUMITOMO METAL IND
发明人： YOSHIHARA MASAHIRO , OKAZAKI TAKU , KOIDE MASAKAZU , MURAKAMI TOSHIHIKO
IPC分类号： B22D11/06
摘要： PURPOSE:To improve the surface characteristic of a product and the production efficiency by disposing a sealing cover which covers an inlet side part and pouring spout for a molten metal and supplying an inert gas in a liquid state into the cover. CONSTITUTION:The sealing cover 8 is provided so as to cover the molten metal inlet side part and pouring spout 4 of a twin belt caster and a pipe to supply the inert gas in the liquid state to the inside thereof is disposed. The inert gas in the liquid state is dropped into the cover 8 from the supply pipe and the molten metal 5 is made to overflow from the spout 4 while belts 2, 2' of the twin belt caster are driven. The gas in the liquid state evaporates in the cover 8 and forms the inert gaseous atmosphere higher than the atm. pressure in the cover. The spacing between the belts 2, 2' and asbestos cloth is thereby thoroughly sealed and the oxidation of the molten metal is obviated. Since the gaseous atmosphere is gently formed, the surface characteristic of the product and the production efficiency are improved.

9. 发明专利

JPS60180652A ENDLESS TRACK TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPS60180652A
公开(公告)日：1985-09-14
申请号：JP3691684
申请日：1984-02-28
申请人： SUMITOMO HEAVY INDUSTRIES , SUMITOMO METAL IND
发明人： TOKUNAGA HARUO , ASARI TAKASHI , OKAZAKI TAKU , KOIDE MASAKAZU
IPC分类号： B22D11/06
摘要： PURPOSE:To remove easily water drops from endless belts with relatively simple constitution by providing electromagnetic coils to the endless belts and generating eddy current by the electromagnetic induction effect thereof so that the endless belts generate heat. CONSTITUTION:Electromagnetic coils 7 are installed to face the casting surfaces of endless belts 3 in the non-casting region B from the part where the belts 3 emerge from a casting region A up to the part where the belts 3 return to the region B. When AC magnetic fields are generated from the coils 7 by conducting alternating current thereto, the belts 3 generate heat on account of the secondary eddy current generated in the belts 3, thus allowing the water drops sticking to the belt surfaces to evaporate in short time. Since the belts 3 are preheated just prior to contact with the molten metal by the heat generating effect thereof, the thermal impact when the molten metal contacts with the belts is relieved.

10. 发明专利

JPS60124451A METHOD FOR DETECTING AND CONTROLLING ABNORMALITY OF TWIN BELT CASTER 失效
公开(公告)号：JPS60124451A
公开(公告)日：1985-07-03
申请号：JP23299083
申请日：1983-12-10
申请人： SUMITOMO METAL IND
发明人： KOIDE MASAKAZU , OKAZAKI TAKU , YOSHIHARA MASAHIRO
IPC分类号： B22D11/06 , B22D11/16
摘要： PURPOSE:To prevent an accident of a twin belt caster and to stabilize an operation by detecting electrically the oscillation of a dam block generated during casting and stopping pouring when a permissible value is exceeded. CONSTITUTION:A molten metal is poured from a ladle 1 via a tundish 4 into a caster 7 and at the same time the caster 7 is started to start casting. The base metal (a) penetrated into the clearance between dam blocks 8 forms a flash a' on the outlet side of the caster and is pulled in the drawing direction of a billet. The blocks 8 and a hoop 8-2 are pulled with said pulling and therefore the dam blocks in the lower part on the outlet side of the caster oscillate. The oscillation is transmitted via rollers 11-3 in sliding contact with the blocks 8 and levers 11-2 to differential transformers 11-4. The rate of oscillation is taken out of said transformers as a potential difference and is compared with a preset permissible value by a comparator 12. When the detected value exceeds the permissible value, a solenoid valve 14 is operated by a control device 13 to lower a cylinder 5, thereby stopping pouring to the caster 7. The sliding nozzle 2 of the ladle 1 is closed at the same instant to stop pouring to the tundish 4.

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