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1. 发明专利

JP2000096253A CHROMATE TREATMENT OF GALVANIZED STEEL SHEET 失效
公开(公告)号：JP2000096253A
公开(公告)日：2000-04-04
申请号：JP26434498
申请日：1998-09-18
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , ARAYA YASUSHI , FURUKAWA SHINYA
IPC分类号： C23C22/30 , C23C22/76
摘要： PROBLEM TO BE SOLVED: To lessen roll maintenance and to improve chromate film quality by suppressing and preventing the surface contamination (the flocculation and adhesion of deposits from a chromate treating liquid) of wringer rolls which remove (drain) the excess adhesion components of the chromate treating liquid applied on a galvanized steel sheet surfaces in chromate treatment of the steel sheet. SOLUTION: Spray nozzles 4 are installed at the wringer rolls 3 and the chromate treating liquid of the same liquid composition as the liquid composition of the chromate treating liquid to be applied on the steel sheet S is sprayed to the rolls 3 to prevent the drying of the roll surfaces. The roll surfaces are held in a moist state at all times and the cooling and washing effects by spraying of the liquid are added thereto, by which the roll surfaces are kept in the clean state free from the deposits and floc. If the spraying of the liquid is executed by directing the spray nozzles 4 toward the upstream side peripheral surfaces of the wringer rolls 3, the spilling of the spraying liquid on the steel sheet surfaces does not occur and the liquid draining of the wringer rolls is not hindered.

2. 发明专利

JPH0995786A CHROMATING TREATMENT FOR GALVANIZED STEEL SHEET 失效
公开(公告)号：JPH0995786A
公开(公告)日：1997-04-08
申请号：JP25410995
申请日：1995-09-29
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , TAKEZAKI KATSUYUKI , MIZUMOTO KOKI , TOKUNAGA HIROFUMI
IPC分类号： B05D1/28 , B05C1/08 , B05D3/02 , B05D3/10 , B05D7/14 , C23C22/28 , C23C22/73 , C23C22/74 , C23C22/76
摘要： PROBLEM TO BE SOLVED: To produce a chromating treated galvanized steel sheet having a beautiful surface skin uniform in the color tone and free from unevenness, in chromating treatment, by specifying the temp. of a galvanized steel sheet before the treatment and the temp. of a chromating soln. SOLUTION: A galvanized steel sheet is coated with a chromating soln. contg. water soluble or water dispersible organic resin by a roll coater. In this chromating method, the temp. of the galvanized steel sheet before the treatment is set within the range of 25 to 45 deg.C. Furthermore, the temp. of a chromating soln. is set within the range of 15 to 30 deg.C, and then, the chromating treatment is executed. As for the galvanized steel sheet, any of galvanized steel sheet or galvannealed steel sheet may be used. The reason why the temp. of the steel sheet is set to 25 to 45 deg.C is for preventing the winding of resin components in the chromating treating soln. round the roll coater. The reason for setting the temp. of the chromating soln. to 15 to 30 deg.C is similar to the above. The galvanized steel sheet treated by the above method is excellent in corrosion resistance and fingerprint resistance.

3. 发明专利

JPH08206720A CONTROLLER FOR IN-LINE SKIN PASS ROLLING MILL IN VACUUM DEPOSITION PLATING LINE 失效
公开(公告)号：JPH08206720A
公开(公告)日：1996-08-13
申请号：JP1450595
申请日：1995-01-31
申请人： NISSHIN STEEL CO LTD
发明人： YAGI MASAHIRO , YAMASHITA NAOKI , HIGUCHI TAKEHIKO , AIKO TAKUYA
IPC分类号： G01H11/06 , B21B37/00 , B21B37/62
摘要： PURPOSE: To surely prevent the rupture of a plate in an in-line skin pass rolling mill in a vacuum deposition plating line without manual intervention. CONSTITUTION: A controller 15 for a skin pass rolling mill 3 is installed on the outlet of a vacuum deposition galvanizing device 1. The controller 15 is constituted of a foreign matter detecting means 16 detecting a foreign matter stuck to a strip metal 4, a travel distance detecting means 17 detecting the travel distance of the strip metal 4, a releasing means 18 making longer the interval of the work rolls of the skin pass rolling mill 3 installed on the skin pass rolling mill 3, and a control means 19. The interval of the work rolls of the skin pass rolling mill 3 can be made longer by the control means 19 by driving the releasing means 18 before the foreign matter detection position of the strip metal 4 reaches the skin pass rolling mill 3, responding to the outputs of the foreign matter detecting means 16 and the travel distance detecting means 17. Consequently, since the bite of an attached foreign matter into the strip metal 4 in the skin pass rolling mill 3 can be avoided, the rupture of the strip metal 4 can be surely prevented.

4. 发明专利

JPH11106882A SNOUT DEVICE FOR CONTINUOUS GALVANIZING LINE 失效
公开(公告)号：JPH11106882A
公开(公告)日：1999-04-20
申请号：JP28432697
申请日：1997-09-30
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , NAKAMIZO HIROYUKI
IPC分类号： C23C2/00 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To prevent abnormality of surface quality so as to stick the drops caused by the entrapment of a strip by again solidifying vaporized zinc from galvanizing bath surface and dropping the solidified zinc on the bath surface. SOLUTION: In the inner wall of a snout 1 at the upper part from the zinc bath surface, an ash receiver 2 having a horizontal part or an inclining part near the horizontal plane so as to receive the ash, is arranged. A sucking pining 3a opened so as to face to the bath surface in the snout, is introduced to outside of a bath vessel through the zinc bath, and a conveying pump is connected with the end part of the sucking piping 3a. An inert gas piping 4 and a nozzle 5 for blowing off the ash, are arranged at the upper part of the ash receiver 2 and in the inner wall of the snout.

5. 发明专利

JPH09111440A VAPORIZATION METHOD SUPPRESSING SPLASHING AND DEVICE THEREFOR 失效
公开(公告)号：JPH09111440A
公开(公告)日：1997-04-28
申请号：JP29473895
申请日：1995-10-18
申请人： NISSHIN STEEL CO LTD
发明人： FUKUI YASUSHI , MIONO TADAAKI , SAITO MINORU , HIGUCHI TAKEHIKO , AIKO TAKUYA
IPC分类号： C23C14/14 , C23C14/24 , C23C14/26
摘要： PROBLEM TO BE SOLVED: To vaporize a metal under stabilized conditions by suppressing the leakage of vapor and splashing. SOLUTION: A vaporizing material 3 introduced into a vaporization tank 2 from a melting tank through a snorkel 1 is heated and transported as the vapor to a substrate through a duct 6. In this case, the material 3 is heated from the upper part by a heater 4 provided above the vaporization tank 2 through a heating radiator 7. A resistance heater, an induction heater, etc., are used as the heating means, and the upper opening of the vaporization tank 2 except the vapor outlet is closed by the radiator 7.

6. 发明专利

JPH08269688A VACUUM VAPOR DEPOSITED AND GALVANIZED STEEL STRIP AND ITS PRODUCTION 失效
公开(公告)号：JPH08269688A
公开(公告)日：1996-10-15
申请号：JP7191695
申请日：1995-03-29
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , AIKO TAKUYA , TAKEZAKI KATSUYUKI , YAGI MASAHIRO
IPC分类号： C23C14/14 , C23C14/24
摘要： PURPOSE: To produce a vacuum vapor deposited and galvanized steel strip which is free from mottled patterns on the surfaces by regulating the temp. of a steel strip just before winding the steel strip around a winding roll heated at its front surface to the evaporation temp. of zinc or above at the time of winding the steel strip around the winding roll and depositing zinc vapor thereof by evaporation while the steel strip is made to travel around the roll. CONSTITUTION: The steel strip 14 which is a material to be plated is annealed in a reduction annealing furnace 2 and is transported via a soaking duct 3 to a cooler 4 where the temp. of the steel strip 14 is adjusted. The steel strip is then transported to a first vacuum vapor deposition chamber 9 where the steel strip is made to travel while the steel strip is wound around the first winding roll 6 heated to about 500 deg.C. The zinc vapor is then vacuum deposited by evaporation on the one surface of the steel strip 14. Further, the steel strip is transported into a second vacuum vapor deposition chamber 10 where the steel strip made to travel while the steel strip is wound around the second winding roll 7 heated to about 500 deg.C. The zinc vapor is then vacuum deposited by evaporation on another surface of the steel strip 14 and thereafter, the steel strip is transported to a temper rolling mill 13. The temp. of the steel strip just before the winding rolls 6, 7 is set in the temp. range of 250 to 300 deg.C or 150 to 200 deg.C in the operation. The formation of the mottled patterns on the surfaces of the vacuum vapor deposited and galvanized steel strip is thus prevented.

7. 发明专利

JPH10152777A VACUUM DEPOSITION SYSTEM 失效
公开(公告)号：JPH10152777A
公开(公告)日：1998-06-09
申请号：JP31443096
申请日：1996-11-26
申请人： MITSUBISHI HEAVY IND LTD , NISSHIN STEEL CO LTD
发明人： TANAKA KISABURO , HIRAI ETSURO , HASHIMOTO RITSUO , SHIMAKAWA TSUKASA , SAITO MINORU , FUKUI YASUSHI , SAKAMOTO KAZUYUKI , MORIYAMA YOSHITERU , AIKO TAKUYA , TAKEZAKI KATSUYUKI , HIGUCHI TAKEHIKO
IPC分类号： C23C14/24 , C23C14/56
摘要： PROBLEM TO BE SOLVED: To provide a vacuum deposition device capable of vapor deposition on both faces by the same system and furthermore capable of the formation of the uniform vapor-deposited faces. SOLUTION: A band steel 10 previously heated to a prescribed temp. is passed through a vacuum chamber 15 with a high vacuum degree, for vapor- depositing metal vapor generated by heating molten metal in a melting crucible 6 on both faces of the band steel 10, the boundary between bifurcated shunt hoods 2 and 2' and a vapor generating chamber 4 is provided with a shutter 3 regulating the flow rate of vapor in which plural pores with different diameter are bored, the metal vapor is introduced into both faces of the band steel 10 from the shutter 3, and furthermore, vapor depositing hoods 1 and 1' connected to the shunt hoods 2 and 2' are respectively provided with porous boards 1a and 1'a for rectification for uniformizing the vapor deposition onto the band steel 10.

8. 发明专利

JPH09143755A PRODUCTION OF CHROMATED GALVANIZED STEEL SHEET AND DEVICE THEREFOR 失效
公开(公告)号：JPH09143755A
公开(公告)日：1997-06-03
申请号：JP29716595
申请日：1995-11-15
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , KAWAGUCHI YASUTAKA , TAGASHIRA KEN
IPC分类号： B05C1/08 , C23C22/24 , C23C22/73 , C23C22/78 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To form a uniform chromate coating film on both sides of a steel sheet by applying a chromating soln. on both sides of the galvanized steel sheet with two sets of roll coaters after the galvanized steel sheet is washed with water and then dried. SOLUTION: A steel sheet 1 plated with Zn or a Zn alloy is introduced into a washing chamber 4, and the upper and lower sides of the sheet 1 are cleaned with the water and hot water sprayed from a nozzle 2. The water film remaining on the sheet surface is wrung out by the draining roll 3 at the outlet of the washing chamber 4, hot air is blown against the sheet in a drier 5 to dry the sheet, the sheet kept at >=50 deg.C is sent to the first roll coater 6a consisting of a coating roll 7a and a lifting roll 8a, and a chromating soln. in a treating tray 9a is applied on one side of the sheet 1. A chromating soln. is applied on the opposite side of the sheet from the coating roll 7b of a second roll coater 6b, and the sheet is then heated to 80-180 deg.C in an oven 12 and dried to fix the chromate film to the sheet. A nice-looking chromated steel sheet of uniform color tone is obtained in this way.

9. 发明专利

JPH06256970A PRODUCTION OF ORGANIC FILM-TREATED STEEL SHEET 失效
公开(公告)号：JPH06256970A
公开(公告)日：1994-09-13
申请号：JP6619893
申请日：1993-03-01
申请人： NISSHIN STEEL CO LTD
发明人： SAKAGUCHI KIMINORI , HIGUCHI TAKEHIKO , DAN EIJI , ARAYA YASUSHI
IPC分类号： B05D1/28 , B05D3/02 , B05D3/10 , B05D7/14 , B05D7/24 , B32B15/08 , C23C2/06 , C23C22/83 , C23C28/00
摘要： PURPOSE:To prevent the coating work from being disturbed by the gelling of the processing soln. resin on the surface of a roll and to secure the surface quality of the org. film-treated steel sheet at the time of treating a chromated steel sheet with an org. resin film by roll coating and using a water-dispersing org. resin emulsion as its processing soln. CONSTITUTION:A steel sheet is chromated and then allowed to stand for at least 8 hr or the chromated steel sheet is heat-treated at >=100 deg.C (for >= about 3 sec), and then an org. film processing soln. is applied. Since chromium(VI) is not eluted into the org. emulsion coating film from the chromating film, the coating work is not disturbed, and a high quality is secured.

10. 发明专利

JPH11106946A CHROMATE TREATING METHOD OF GALVANIZED STEEL SHEET 失效
公开(公告)号：JPH11106946A
公开(公告)日：1999-04-20
申请号：JP26553697
申请日：1997-09-30
申请人： NISSHIN STEEL CO LTD
发明人： HIGUCHI TAKEHIKO , ARAYA YASUSHI , NORITAKE MASAATSU , YOSHITAKE MAKOTO
IPC分类号： C23C22/73
摘要： PROBLEM TO BE SOLVED: To provide a chromate treating method for suppressing and preventing the defect of microrepellent generated on application type chromate coating on the surface of a galvanized steel sheet because it can not be prevented only by thoroughly cleaning the surface of the steel sheet before the treatment. SOLUTION: In heat treatment (drying and baking of applying soln. coating film) in succession to the application of a chromate treating soln. on the surface of a steel sheet, drying under heating at a temp. rising rate of =2 sec. In the actual operation, the temp. rising rate shall be set to 1 to 3 deg.C and the time 2 to 5 sec. There is strong correlation between the temp. rising rate in the drying stage and the generation of the defect of microrepellent, and the generation of the defect can almost perfectly be prevented by the regulation of the temp. rising rate.

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