EP0162989A1 - Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface - Google Patents

Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface Download PDF

Info

Publication number
EP0162989A1
EP0162989A1 EP84401121A EP84401121A EP0162989A1 EP 0162989 A1 EP0162989 A1 EP 0162989A1 EP 84401121 A EP84401121 A EP 84401121A EP 84401121 A EP84401121 A EP 84401121A EP 0162989 A1 EP0162989 A1 EP 0162989A1
Authority
EP
European Patent Office
Prior art keywords
strip
zinc
brush
coating
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84401121A
Other languages
German (de)
French (fr)
Other versions
EP0162989B1 (en
Inventor
Robert Haaser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
USINOR SA
Original Assignee
USINOR SA
Union Siderurgique du Nord et de lEst de France SA USINOR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8192890&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0162989(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by USINOR SA, Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical USINOR SA
Priority to AT84401121T priority Critical patent/ATE33043T1/en
Priority to EP84401121A priority patent/EP0162989B1/en
Priority to DE8484401121T priority patent/DE3469917D1/en
Priority to SU3899255A priority patent/SU1389685A3/en
Priority to CA000482663A priority patent/CA1225550A/en
Priority to MX205430A priority patent/MX162647A/en
Priority to BR8502567A priority patent/BR8502567A/en
Priority to US06/739,080 priority patent/US4594272A/en
Priority to CS385585A priority patent/CS273605B2/en
Priority to AU43152/85A priority patent/AU575650B2/en
Priority to KR1019850003769A priority patent/KR900000299B1/en
Priority to ES544304A priority patent/ES8609503A1/en
Publication of EP0162989A1 publication Critical patent/EP0162989A1/en
Priority to ES1986292492U priority patent/ES292492Y/en
Publication of EP0162989B1 publication Critical patent/EP0162989B1/en
Application granted granted Critical
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/22—Removing excess of molten coatings; Controlling or regulating the coating thickness by rubbing, e.g. using knives, e.g. rubbing solids

Definitions

  • the present invention aims to remedy this drawback by improving the ease of operation of the installation for the industrial implementation of the process, which also results in an improvement in the quality of the product and in its profitability taking into account the reduced losses. for adjustment at each production campaign.
  • the present invention thus relates to a method of manufacturing a strip of hot-dip galvanized steel sheet free of coating of pure Zn or based on Zn on at least one face, in which the strip is passed continuously through a conventional dip galvanizing bath, part of the coating of liquid Zn deposited on the strip is pneumatically wiped off and subjected to at least one side of this strip has a mechanical action to completely eliminate the coating based on Zn not alloyed with iron, leaving only a thin layer of iron-zinc alloy, characterized in that this action is exerted mechanically on the coating layer based on zinc which is still liquid using a brush, at least the bristles of which are vigorously cooled.
  • the brush is metallic and is cooled by a forced gas stream in which it is placed. Its hollow central shaft is also traversed by a stream of coolant.
  • Zn coating or Zn coating is used for simplicity to denote a coating deposited from a dip galvanizing bath which may contain other metals such as, for example, aluminum in varying proportions over a wide range.
  • the originality of the present invention therefore lies in the fact that the zinc coating is brushed in the liquid state.
  • it is essential to sufficiently cool the bristles in order to cause solidification of the liquid zinc in contact with the bristles of the brush, all the more since the quantity of Zn to be eliminated is greater and the temperature of the latter higher.
  • the improvement provided by the invention makes it possible to overcome the relatively critical adjustment of the brushing height, which is of considerable interest taking into account the variations in running speed that a galvanizing line can undergo in operation. Furthermore, when changing parameters such as the thickness of the strip, one is also not required to determine the brushing area in a relatively precise manner and thus to vary the height of the device. brushing in a vertical plane above the surface of the zinc bath.
  • this advantage results in the fact that no device for adjusting the height of the brush, relative to the surface of the zinc bath, is necessary and that the latter can therefore be maintained at a predetermined fixed level in a horizontal plane.
  • the metallic bristles of the brush are vigorously cooled by placing this brush in a forced gas stream, which in practice is air.
  • the forced gas stream has a double function of cooling the bristles of the brush and of solidifying, in the form of solid particles, the droplets of liquid Zn which may be projected during brushing.
  • the vigorous cooling of the bristles of the brush is a function of the amount of liquid Zn to be removed from the strip.
  • the simple ventilation natu - Relle brush simply because of its rotation in the surrounding air may be sufficient and more so as the Zn coating liquid has a lower temperature.
  • the hollow shaft of the brush is conventionally cooled by circulation of a cooling fluid.
  • means for recovering the zinc particles produced in addition to the means for cooling the brush, means are provided for recovering the zinc particles produced.
  • the invention also relates to a brushing device for implementing the method of the present invention, comprising a support located along the path of the strip above the surface of the zinc bath and carrying a rotary cylindrical brush. the end of the bristles of which comes into contact with the surface of the strip opposite which it is placed, and at least one opposing roller for pressing against the opposite face of the strip, characterized in that the brush is placed in a housing for forced circulation of a gaseous cooling fluid.
  • this casing extends widely in the direction perpendicular to the axis of the strip with respect to the edges of the latter and comprises two zones separated by a wall, the first zone being the zone of forced circulation of the coolant and the second zone being a zone for recovering zinc particles which are removed from the brushed surface of the strip.
  • the second zone preferably comprises inclined flaps channeling the particles of solidified zinc towards a discharge conduit connected to a hopper for recovering the finely divided particles of solidified zinc.
  • the device comprises, opposite the face opposite to the brushing face, vertical deflectors delimiting vertical baffles channeling the gas flow and preventing redeposition on the face comprising the zinc coating, particles generated by the brushing.
  • these vertical deflectors are placed so that they surround the support roller over a large part of its periphery.
  • these deflectors are cut in a substantially central zone by a wall in the form of an inclined plane directed towards the strip, opening into a gutter for collecting dust or Zn particles.
  • Figure 1 a conventional dip galvanizing installation comprising a bath 1 of molten zinc into which penetrates a strip 2 of sheet steel from a furnace not shown, and circulating in a channel 3 under a protective atmosphere.
  • This strip is returned by a roller 4 at the bottom of the tank and leaves the zinc bath vertically, being wiped by a pneumatic device 5 located in the vicinity of the surface of the zinc bath.
  • the strip continues its path vertically as indicated by arrow 6 after having passed through the zinc coating brushing device according to the present invention. 1
  • This device comprises a support 8 movable in translation in a horizontal plane and parallel to the plane of the strip, for example on rails 9.
  • a brush 10 is integral with this support and driven in rotation, by means not shown thanks to a motor 11 mounted on the support.
  • the means 10 a of this brush is preferably hollow and traversed by a cooling fluid.
  • a counter-roller 12 placed opposite the face of the strip opposite to brushing provides support for the strip which it pushes back in the direction of the bristles of the brush so that the plane of the strip is slightly secant to the envelope of the end of the bristles of the brush 10.
  • the brush 10 is housed in a casing 13 described below in detail in FIG. 2.
  • This casing 13 is connected on the one hand to a circuit 14 for forced circulation of a brush cooling gas opening into a hopper 15, the circuit is put into suction by a blower 16.
  • the casing 13 is connected on the other hand to a circuit 17 for dust extraction, opening into a hopper 18 and equipped with another blower 19.
  • the two circuits 14 and 17 are thus put into suction to limit as much as possible the release and circulation of dust.
  • the casing enveloping the brush 10 comprises a baffle 20 for entering the stream of cooling gas in forced circulation by suction. It is moreover separated into two distinct zones by a wall 21 whose upper edge 21 a is disposed in the vicinity of the lower generatrix of the brush 10.
  • This zone 22 flows the stream of cooling gas from the brush.
  • This zone of forced circulation surrounds the major part of the external surface of the cylindrical brush so as to ensure its most effective cooling and is located in a position opposite to the strip 2 relative to the brush 10.
  • This zone of forced circulation cooling gas opens into a box 23, connected to the cooling gas suction circuit 14.
  • This zone 24 comprises deflector flaps 25, 26, 27, in the form of inclined planes and which channel the solidified zinc particles ejected towards the base of the casing 13 where they are recovered by suction by the pipe 29 connected to the suction circuit 17 zinc dust.
  • These flaps are preferably adjustable about horizontal axes and extend through slots 13 in the housing.
  • Deflectors 30 a , 30 b regularly spaced and surrounding the support roller 12 over a large part of its periphery are placed vertically, as shown in Figure 3, so as to vertically channel the gas stream existing on the face of the strip opposite to brushing.
  • These vertical baffles 30a, 30b form vertical baffles preventing possible redeposition of zinc dust generated by brushing the opposite face which could adversely affect the surface bearing the conventional coating zinc.
  • Vertical baffles 30a, 30b are separated in a substantially central region by a wall 31 in the form of an inclined plane, directed towards the web 2 and perpendicular to the deflectors.
  • This inclined plane opens out along its lower edge into a gutter 32 with which it delimits a slope 31 S of relatively small width and which is connected to the circuit 14 for circulating the cooling gas of the brush ( Figures 2 and 3).
  • the deflectors 30 b located below the wall 31 are arranged, preferably endenx groups located in the vicinity of the edges of the sheet, and separated by a central zone 33.
  • the casing 13 and all of the deflectors 30 2 and 30 b are of substantially equal width and extend well beyond the edges of the strip 2, as can be seen in FIGS. 3 and 4, the circulating current -tion gas induced around the strip 2 on the opposite face of the counterpush roller 12, is partitioned and channeled as indicated by the arrows so as to effectively prevent the possible redeposition of the zinc particles generated by brushing, at -beyond the edges on the face with a classic zinc coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.

Description

tion de tôles ou de feuillards d'acier galvanisé,, notamment emboutissables.tion of galvanized steel sheets or strips, in particular stampable.

On connaît en particulier d'après le brevet européen N° 0011547 un procédé et un dispositif pour la fabrication de tôles d'acier emboutissables galvanisées à chaud dans lequel, après enduction au trempé dans un bain à base de Zn en fusion, une des faces de la bande est soumise à une action mécanique, notamment un brossage, dans une zone où le revêtement de Zn présent sur la tôle passe par un état transitoire liquide-solide qui se caractérise par sa friabilité. Cet état est atteint en théorie peu après la solidification du zinc.Particularly known from European patent N ° 0011547 is a process and a device for the production of stampable hot-dip galvanized steel sheets in which, after dip coating in a bath based on molten Zn, one of the faces of the strip is subjected to a mechanical action, in particular brushing, in an area where the coating of Zn present on the sheet passes through a liquid-solid transient state which is characterized by its friability. This state is reached in theory shortly after the solidification of the zinc.

Cependant d'un point de vue pratique, sur une ligne de fabrication industrielle, le brossage en un-tel point pose le problème de la détermination exacte de sa hauteur par rapport au niveau du bain, compte tenu de la température de ce dernier, de l'épaisseur de la bande, de la vitesse de défilement de la bande et également de l'intensité de fonctionnement des dispositifs pneumatiques qui sont utilisés pour essuyer partiellement en l'uniformisant le revêtement de Zn déposé.However from a practical point of view, on an industrial manufacturing line, brushing at such a point poses the problem of the exact determination of its height relative to the level of the bath, taking into account the temperature of the latter, of the thickness of the strip, the speed of travel of the strip and also the intensity of operation of the pneumatic devices which are used for partially wiping and uniformizing the coating of deposited Zn.

La présente invention vise à remédier à cet inconvénient en améliorant la facilité de conduite de l'installation de mise en oeuvre industrielle du procédé, ce qui se traduit également par une amélioration de la qualité du produit et de sa rentabilité compte tenu des.pertes réduites pour réglage à chaque campagne de fabrication.The present invention aims to remedy this drawback by improving the ease of operation of the installation for the industrial implementation of the process, which also results in an improvement in the quality of the product and in its profitability taking into account the reduced losses. for adjustment at each production campaign.

La présente invention a ainsi pour objet un procédé de fabrication d'une bande de tôle d'acier galvanisé à chaud exempte de revêtement de Zn pur ou à base de Zn sur au moins une face, dans lequel on fait passer la bande en continu dans un bain de galvanisation au trempé classique, on essuie par des moyens pneumatiques une partie du revêtement de Zn liquide déposé sur la bande et on soumet au moins une face de cette bande à une action mécanique pour en éliminer complètement le revêtement à base de Zn non allié au fer, en ne laissant subsister qu'une mince couche d'alliage fer-zinc, caractérisé en ce qu'on exerce cette action mécanique sur la couche de revêtement à base de zinc encore liquide à l'aide d'une brosse dont au moins les poils sont énergiquement refroidie.The present invention thus relates to a method of manufacturing a strip of hot-dip galvanized steel sheet free of coating of pure Zn or based on Zn on at least one face, in which the strip is passed continuously through a conventional dip galvanizing bath, part of the coating of liquid Zn deposited on the strip is pneumatically wiped off and subjected to at least one side of this strip has a mechanical action to completely eliminate the coating based on Zn not alloyed with iron, leaving only a thin layer of iron-zinc alloy, characterized in that this action is exerted mechanically on the coating layer based on zinc which is still liquid using a brush, at least the bristles of which are vigorously cooled.

Selon une autre caractéristique de l'invention, la brosse est métallique et est refroidie par un courant gazeux forcé dans lequel elle est placée. Son arbre central creux est par ailleurs parcouru par un courant de fluide de refroidissemet.According to another characteristic of the invention, the brush is metallic and is cooled by a forced gas stream in which it is placed. Its hollow central shaft is also traversed by a stream of coolant.

Dans la suite du présent mémoire on utilise à titre de simplification l'expression revêtement de Zn ou à base de Zn pour désigner un revêtement déposé à partir d'un bain de galvanisation au trempé pouvant contenir d'autres métaux tels que par exemple l'aluminium en des proportions variant dans une large gamme.In the remainder of this specification, the term Zn coating or Zn coating is used for simplicity to denote a coating deposited from a dip galvanizing bath which may contain other metals such as, for example, aluminum in varying proportions over a wide range.

L'originalité de la présente invention réside donc dans le fait que le revêtement de zinc est brossé à l'état liquide. Cependant pour ne pas encrasser ou empater la brosse, il est indispensable de suffisamment refroidir ses poils afin de provoquer une solidification du zinc liquide au contact des poils de la brosse et ce d'autant plus que la quantité de Zn à éliminer est plus importante et la température de ce dernier plus élevée.The originality of the present invention therefore lies in the fact that the zinc coating is brushed in the liquid state. However, in order not to clog or smear the brush, it is essential to sufficiently cool the bristles in order to cause solidification of the liquid zinc in contact with the bristles of the brush, all the more since the quantity of Zn to be eliminated is greater and the temperature of the latter higher.

Ainsi le perfectionnement apporté par l'invention permet de s'affranchir du réglage relativement critique de la hauteur de brossage, ce qui est d'un intérêt considérable compte tenu des variations de vitesse de défilement que peut subir une ligne de galvanisation en fonctionnement. Par ailleurs, lors de changements de paramètres tels que l'épaisseur de la bande, on n'est pas non plus astreint à déterminer la zone de brossage d'une manière relativement précise et à faire ainsi varier la hauteur du dispositif de brossage dans un plan vertical au-dessus de la surface du bain de zinc.Thus the improvement provided by the invention makes it possible to overcome the relatively critical adjustment of the brushing height, which is of considerable interest taking into account the variations in running speed that a galvanizing line can undergo in operation. Furthermore, when changing parameters such as the thickness of the strip, one is also not required to determine the brushing area in a relatively precise manner and thus to vary the height of the device. brushing in a vertical plane above the surface of the zinc bath.

Au niveau de la mise en oeuvre industrielle, cet avantage se traduit par le fait qu'aucun dispositif de réglage de la hauteur de la brosse, par rapport à la surface du bain de zinc, n'est nécessaire et que cette dernière peut donc être maintenue à un niveau fixe prédéterminé dans un plan horizontal.At the level of industrial implementation, this advantage results in the fact that no device for adjusting the height of the brush, relative to the surface of the zinc bath, is necessary and that the latter can therefore be maintained at a predetermined fixed level in a horizontal plane.

L'invention procède cependant du même concept inventif que pour le brevet européen N° 011547 dont elle est un perfectionnement, car pour obtenir le résultat attendu, à savoir l'élimination du revêtement de Zn non allié, il est nécessaire, si l'on brosse une couche de zinc liquide, de refroidir énergiquement les poils de la brosse, ce qui provoque par échangé calorifique avec les poils de la brosse froids qui viennent au contact d'une zone élémentaire de zinc entourant l'extrémité du poil, le passage de ce revêtement de zinc non allié dans son état transitoire liquide-solide caractérisé par sa grande friabilité.The invention however proceeds from the same inventive concept as for European patent No. 011547 of which it is an improvement, because to obtain the expected result, namely the elimination of the coating of unalloyed Zn, it is necessary, if one brush a layer of liquid zinc, to cool the bristles of the brush vigorously, which causes heat exchange with the cold bristles of the brush which come into contact with an elementary zone of zinc surrounding the end of the bristle, the passage of this coating of unalloyed zinc in its liquid-solid transient state characterized by its great friability.

Le refroidissement énergique des poils métalliques de la brosse est assuré en plaçant cette brosse dans un courant gazeux forcé, qui en pratique, est de l'air.The metallic bristles of the brush are vigorously cooled by placing this brush in a forced gas stream, which in practice is air.

Le courant gazeux forcé exerce une double fonction de refroidissement des poils de la brosse et de solidification sous forme de particules solides des gouttelettes de Zn liquide éventuellement projetées lors du brossage.The forced gas stream has a double function of cooling the bristles of the brush and of solidifying, in the form of solid particles, the droplets of liquid Zn which may be projected during brushing.

Il est toutefois à noter que le refroidissement énergique des poils dela brosse est fonction de la quantité de Zn liquide à éliminer de la bande. Ainsi pour une ligne fonctionnant à faible vitesse, la simple ventilation natu- relle de la brosse du seul fait de sa rotation dans l'air environnant peut être suffisante et ce d'autant plus que le revêtement de Zn liquide a une température plus basse.It should however be noted that the vigorous cooling of the bristles of the brush is a function of the amount of liquid Zn to be removed from the strip. Thus, for a line running at low speed, the simple ventilation natu - Relle brush simply because of its rotation in the surrounding air may be sufficient and more so as the Zn coating liquid has a lower temperature.

On assure par ailleurs de façon classique le refroidissement de l'arbre creux de la brosse par circulation d'un fluide de refroidissement.Furthermore, the hollow shaft of the brush is conventionally cooled by circulation of a cooling fluid.

Selon une autre caractéristique de la présente invention, on prévoit outre les moyens de refroidissement de la brosse, des moyens pour récupérer les particules de zinc produites.According to another characteristic of the present invention, in addition to the means for cooling the brush, means are provided for recovering the zinc particles produced.

L'invention a également pour objet un dispositif de brossage pour la mise en oeuvre du procédé de la présente invention, comprenant un support situé le long du trajet de la bande au-dessus de la surface du bain de zinc et portant une brosse cylindrique rotative dont l'extrémité des poils entre en contact avec la surface de la bande en regard de laquelle elle est placée, et au moins un rouleau antagoniste d'appui au contact de la face opposée de la bande, caractérisé en ce que la brosse est placée dans un carter de circulation forcée d'un fluide gazeux de refroidissement.The invention also relates to a brushing device for implementing the method of the present invention, comprising a support located along the path of the strip above the surface of the zinc bath and carrying a rotary cylindrical brush. the end of the bristles of which comes into contact with the surface of the strip opposite which it is placed, and at least one opposing roller for pressing against the opposite face of the strip, characterized in that the brush is placed in a housing for forced circulation of a gaseous cooling fluid.

Selon une autre caractéristique de l'invention, ce carter déborde largement dans la direction perpendiculaire à l'axe de la bande par rapport aux rives de cette dernière et comporte deux zones séparées par une paroi, la première zone étant la zone de circulation forcée du fluide de refroidissement et la seconde zone étant une zone de récupération des particules de zinc qui sont éliminées de la surface brossée de la bande.According to another characteristic of the invention, this casing extends widely in the direction perpendicular to the axis of the strip with respect to the edges of the latter and comprises two zones separated by a wall, the first zone being the zone of forced circulation of the coolant and the second zone being a zone for recovering zinc particles which are removed from the brushed surface of the strip.

La seconde zone comporte de préférence des volets inclinés canalisant les particules de zinc solidifié vers un conduit d'évacuation relié à une trémie de récupération des particules finement divisées de zinc solidifié.The second zone preferably comprises inclined flaps channeling the particles of solidified zinc towards a discharge conduit connected to a hopper for recovering the finely divided particles of solidified zinc.

Selon encore une autre caractéristique, le dispositif comporte en regard de la face opposée à la face de brossage des déflecteurs verticaux délimitant des chicanes verticales canalisant l'écoulement gazeux et empêchant la redéposition sur la face comportant le revêtement de zinc, des particules générées par le brossage.According to yet another characteristic, the device comprises, opposite the face opposite to the brushing face, vertical deflectors delimiting vertical baffles channeling the gas flow and preventing redeposition on the face comprising the zinc coating, particles generated by the brushing.

Selon un mode de réalisation ces déflecteurs verticaux sont placés de telle sorte qu'ils entourent le rouleau d'appui sur une partie importante de sa périphérie.According to one embodiment, these vertical deflectors are placed so that they surround the support roller over a large part of its periphery.

Selon une variante ces déflecteurs sont coupés dans une zone sensiblement centrale par une paroi en forme de plan incliné dirigé vers la bande, débouchant dans une gouttière de récupération des poussières ou particules de Zn.According to a variant, these deflectors are cut in a substantially central zone by a wall in the form of an inclined plane directed towards the strip, opening into a gutter for collecting dust or Zn particles.

L'invention est exposée ci-après en détail à l'aide des dessins annexés qui en représentent un mode de réalisation. Sur ces dessins :

  • La Figure 1 est une vue schématique partielle en élévation d'une installation selon la présente invention.
  • La Figure 2 est une vue en élévation de côté et en coupe du dispositif de brossage de la Figure 1.
  • Les Figures 3 et 4 sont respectivement des vues en coupe selon les lignes 3-3 et 4-4 de la Figure 2.
The invention is described below in detail using the accompanying drawings which show an embodiment. In these drawings:
  • Figure 1 is a partial schematic elevational view of an installation according to the present invention.
  • Figure 2 is a side elevational view in section of the brushing device of Figure 1.
  • Figures 3 and 4 are sectional views along lines 3-3 and 4-4 of Figure 2, respectively.

Sur la Figure 1 est représentée une installation de galvanisation classique au trempé comportant un bain 1 de zinc en fusion dans lequel pénètre une bande 2 de tôle d'acier issue d'un four non représenté, et circulant dans un canal 3 sous atmosphère protectrice. Cette bande est renvoyée par un rouleau 4 de fond de cuve et sort verticalement du bain de zinc en étant essuyée par un dispositif pneumatique 5 situé au voisinage de la surface du bain de zinc.In Figure 1 is shown a conventional dip galvanizing installation comprising a bath 1 of molten zinc into which penetrates a strip 2 of sheet steel from a furnace not shown, and circulating in a channel 3 under a protective atmosphere. This strip is returned by a roller 4 at the bottom of the tank and leaves the zinc bath vertically, being wiped by a pneumatic device 5 located in the vicinity of the surface of the zinc bath.

La bande poursuit son trajet verticalement comme indiqué par la flèche 6 après avoir traversé le dispositif de brossage de revêtement de zinc selon la présente invention. 1 The strip continues its path vertically as indicated by arrow 6 after having passed through the zinc coating brushing device according to the present invention. 1

Ce dispositif comporte un support 8 mobile en translation dans un plan horizontal et parallèlement au plan de la bande, par exemple sur des rails 9.This device comprises a support 8 movable in translation in a horizontal plane and parallel to the plane of the strip, for example on rails 9.

Une brosse 10 est solidaire de ce support et en- trainée en rotation, par des moyens non représentés grâce à un moteur 11 monté sur le support. Le moyen 10a de cette brosse est de préférence creux et parcouru par un fluide de refroidissement.A brush 10 is integral with this support and driven in rotation, by means not shown thanks to a motor 11 mounted on the support. The means 10 a of this brush is preferably hollow and traversed by a cooling fluid.

Un contre-rouleau 12 placé en regard de la face de la bande opposée au brossage fournit un appui à la bande qu'il repousse en direction des poils de la brosse de sorte que le plan de la bande soit légèrement sécant à l'enveloppe de l'extrémité des poils de la brosse 10.A counter-roller 12 placed opposite the face of the strip opposite to brushing provides support for the strip which it pushes back in the direction of the bristles of the brush so that the plane of the strip is slightly secant to the envelope of the end of the bristles of the brush 10.

La brosse 10 est logée dans un carter 13 décrit ci-après en détail à la Figure 2.The brush 10 is housed in a casing 13 described below in detail in FIG. 2.

Ce carter 13 est relié d'une part à un circuit 14 de circulation forcée d'un gaz de refroidissement de la brosse débouchant dans une trémie 15, le circuit est mis en aspiration par une soufflante 16.This casing 13 is connected on the one hand to a circuit 14 for forced circulation of a brush cooling gas opening into a hopper 15, the circuit is put into suction by a blower 16.

Le carter 13 est relié d'autre part à un circuit 17 d'aspiration des poussières, débouchant dans une trémie 18 et équipé d'une autre soufflante 19.The casing 13 is connected on the other hand to a circuit 17 for dust extraction, opening into a hopper 18 and equipped with another blower 19.

Les deux circuits 14 et 17 sont ainsi mis en aspiration pour limiter au maximum le dégagement et la circulation des poussières.The two circuits 14 and 17 are thus put into suction to limit as much as possible the release and circulation of dust.

Sur la Figure 2, le carter enveloppant la brosse 10, comporte une chicane 20 d'entrée du courant de gaz de refroidissement en circulation forcée par aspiration. Il est par ailleurs séparé en deux zones distinctes par une paroi 21 dont le bord supérieur 21a est disposé au voisinage de la génératrice inférieure de la brosse 10.In FIG. 2, the casing enveloping the brush 10 comprises a baffle 20 for entering the stream of cooling gas in forced circulation by suction. It is moreover separated into two distinct zones by a wall 21 whose upper edge 21 a is disposed in the vicinity of the lower generatrix of the brush 10.

Dans la première zone 22 circule le courant de gaz de refroidissement de la brosse. Cette zone de circulation forcée entoure la majeure partie de la surface extérieure de la brosse cylindrique de façon à en assurer le refroidissement le plus efficace et se trouve en une position opposée à la bande 2 par rapport à la brosse 10. Cette zone de circulation forcée du gaz de refroidissement débouche dans un caisson 23, relié au circuit 14 d'aspiration du gaz de refroidissement.In the first zone 22 flows the stream of cooling gas from the brush. This zone of forced circulation surrounds the major part of the external surface of the cylindrical brush so as to ensure its most effective cooling and is located in a position opposite to the strip 2 relative to the brush 10. This zone of forced circulation cooling gas opens into a box 23, connected to the cooling gas suction circuit 14.

La seconde zone 24, séparée de façon quasi étanche de la zone 22 par la paroi 21, au moins pour ce qui est des particules de zinc générées par le brossage; est située en regard de la face de la bande comportant un revêtement de zinc liquide qui va être brossé par la brosse 10.The second zone 24, separated in an almost leaktight manner from the zone 22 by the wall 21, at least as regards the zinc particles generated by brushing; East located opposite the face of the strip comprising a coating of liquid zinc which will be brushed by the brush 10.

Cette zone 24 comporte des volets déflecteurs 25, 26, 27, en forme de plans inclinés et qui canalisent les particules de zinc solidifiées éjectées vers la base du carter 13 où elles sont récupérées par aspiration par la conduite 29 reliée au circuit 17 d'aspiration des poussières de zinc. Ces volets sont de préférence orientables autour d'axes horizontaux et, s'étendent à travers des fentes 13a du carter.This zone 24 comprises deflector flaps 25, 26, 27, in the form of inclined planes and which channel the solidified zinc particles ejected towards the base of the casing 13 where they are recovered by suction by the pipe 29 connected to the suction circuit 17 zinc dust. These flaps are preferably adjustable about horizontal axes and extend through slots 13 in the housing.

Des déflecteurs 30a, 30b régulièrement espacés et entourant le rouleau d'appui 12 sur une partie importante de sa périphérie sont placés verticalement, comme cela ap- parait sur la Figure 3, de façon à canaliser verticalement le courant gazeux existant sur la face de la bande opposée au brossage. Ces déflecteurs verticaux 30a, 30b forment des chicanes verticales empêchant la redéposition éventuelle des poussières de zinc générées par le brossage de la face opposée et qui pourraient affecter de façon défavorable la face portant le revêtement classique de zinc.Deflectors 30 a , 30 b regularly spaced and surrounding the support roller 12 over a large part of its periphery are placed vertically, as shown in Figure 3, so as to vertically channel the gas stream existing on the face of the strip opposite to brushing. These vertical baffles 30a, 30b form vertical baffles preventing possible redeposition of zinc dust generated by brushing the opposite face which could adversely affect the surface bearing the conventional coating zinc.

Les déflecteurs verticaux 30a, 30b sont séparés dans une zone sensiblement médiane, par une paroi 31 en forme de plan incliné, dirigé vers la bande 2 et perpendiculaire aux déflecteurs. Ce plan incliné débouche le long de son bord inférieur dans une gouttière 32 avec laquelle il délimite une pente 31S de relativement faible largeur et qui est reliée au circuit 14 de circulation du gaz de refroidissement de la brosse (Figures 2 et 3).Vertical baffles 30a, 30b are separated in a substantially central region by a wall 31 in the form of an inclined plane, directed towards the web 2 and perpendicular to the deflectors. This inclined plane opens out along its lower edge into a gutter 32 with which it delimits a slope 31 S of relatively small width and which is connected to the circuit 14 for circulating the cooling gas of the brush (Figures 2 and 3).

Les déflecteurs 30b, situés au-dessous de la paroi 31 sont disposés, de préférence endenx groupes situés au voisinage des bords de la tôle, et séparés par une zone centrale 33.The deflectors 30 b , located below the wall 31 are arranged, preferably endenx groups located in the vicinity of the edges of the sheet, and separated by a central zone 33.

Etant donné que le carter 13 et l'ensemble des déflecteurs 302 et 30b sont de largeur sensiblement égale et débordent largement des rives de la bande 2, comme cela est visible sur les Figures 3 et 4, le courant de circula--tion gazeux induit autour de la bande 2 sur la face en regard du contre-rouleau d'agpui 12, est cloisonné et canalisé comme indiqué par les flèches de façon à empêcher efficacement la redéposition éventuelle des particules de zinc générées par le brossage, au-delà des rives sur la face à revêtement classique de zinc.Since the casing 13 and all of the deflectors 30 2 and 30 b are of substantially equal width and extend well beyond the edges of the strip 2, as can be seen in FIGS. 3 and 4, the circulating current -tion gas induced around the strip 2 on the opposite face of the counterpush roller 12, is partitioned and channeled as indicated by the arrows so as to effectively prevent the possible redeposition of the zinc particles generated by brushing, at -beyond the edges on the face with a classic zinc coating

Claims (12)

1. Procédé de fabrication d'une bande de tôle d'acier galvanisée à chaud exempte de revêtement de Zn pur ou à base de Zn sur au moins une face, dans lequel on fait passer la bande en continu dans un bain de galvanisation au trempé classique, on essuie par des moyens pneumatiques une partie du revêtement de Zn liquide déposé sur la bande et on soumet au moins une face de cette bande à une action mécanique pour en éliminer complètement le revêtement à base de Zn non allié au fer, en ne laissant subsister qu'une mince couche d'alliage fer-zinc, caractérisé en ce qu'on exerce cette action mécanique sur la couche de revêtement à base de zinc encore liquide à l'aide d'une brosse dont au moins les poils sont énergiquement_refroidis.1. Method for manufacturing a strip of hot-dip galvanized steel sheet free of coating of pure Zn or based on Zn on at least one face, in which the strip is passed continuously through a dip galvanizing bath conventional, part of the coating of liquid Zn deposited on the strip is pneumatically wiped off and at least one face of this strip is subjected to mechanical action in order to completely remove the coating based on Zn not alloyed with iron, leaving only a thin layer of iron-zinc alloy, characterized in that this mechanical action is exerted on the coating layer based on zinc which is still liquid using a brush, at least the bristles of which are energetically cooled. . 2. Procédé selon la revendication 1, caractérisé en ce que la brosse métallique est refroidie par un courant gazeux sous circulation forcée.2. Method according to claim 1, characterized in that the wire brush is cooled by a gas stream under forced circulation. 3. Procédé selon la revendication 2, caractérisé en ce que le gaz est de l'air.3. Method according to claim 2, characterized in that the gas is air. 4. Procédé selon la revendication 2 ou 3, caractérisé en ce que la circulation forcée est créée par aspiration.4. Method according to claim 2 or 3, characterized in that the forced circulation is created by suction. 5. Dispositif de brossage pour la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, comprenant un support (8) situé le long du trajet de la bande (2) au-dessus de la surface du bain de zinc (1) et portant une brosse cylindrique rotative (10) dont l'extrémité des poils entre en contact avec la surface de la bande (2) en regard de laquelle elle est placée, et au moins un rouleau antagoniste d'appui (12) au contact de la face opposée de la bande, caractérisé en ce que la brosse est placée dans un carter (13) de circulation forcée d'un fluide gazeux de refroidissement.5. Brushing device for implementing the method according to any one of the preceding claims, comprising a support (8) located along the path of the strip (2) above the surface of the zinc bath (1 ) and carrying a rotary cylindrical brush (10) the end of the bristles of which comes into contact with the surface of the strip (2) opposite which it is placed, and at least one opposing support roller (12) in contact on the opposite side of the strip, characterized in that the brush is placed in a housing (13) for forced circulation of a gaseous cooling fluid. 6. Dispositif selon la revendication 5, caractérisé en ce que le carter déborde largement dans la direction perpendiculaire à l'axe de la bande par rapport aux rives de cette dernière et comporte deux zones (22, 24) séparées par une paroi (21), la première zone (22) étant la zone de circulation forcée du fluide de refroidissement et la seconde zone (24) étant une zone de récupération des poussières ou particules de zinc qui sont éliminées de la surface de la bande brossée.6. Device according to claim 5, characterized in that the casing extends widely in the direction perpendicular to the axis of the strip relative to the edges of the latter and comprises two zones (22, 24) separated by a wall (21) , the first zone (22) being the zone for the forced circulation of the cooling fluid and the second zone (24) being a zone for recovering the dust or particles of zinc which are eliminated from the surface of the brushed strip. 7. Dispositif selon la revendication 6, caractérisé en ce que la paroi (21) s'étend jusqu'au voisinage de la génératrice inférieure de la brosse (10).7. Device according to claim 6, characterized in that the wall (21) extends to the vicinity of the lower generator of the brush (10). 8. Dispositif selon la revendication 5 ou 6, caractérisé en ce que la seconde zone (24) comporte des volets inclinés (25, 26, 27) canalisant les particules de zinc solidifié vers un conduit d'évacuation (29) relié à une trémie de récupération (18) des particules finement divisées de zinc solidifié.8. Device according to claim 5 or 6, characterized in that the second zone (24) comprises inclined flaps (25, 26, 27) channeling the particles of solidified zinc towards a discharge conduit (29) connected to a hopper recovery (18) of finely divided particles of solidified zinc. 9. Dispositif selon la revendication 6, caractérisé en ce que chaque zone (22, 24) est reliée à un circuit respectif d'aspiration (14, 17).9. Device according to claim 6, characterized in that each zone (22, 24) is connected to a respective suction circuit (14, 17). 10. Dispositif selon l'une quelconque des revendications 5 à 9 caractérisé en ce qu'il comporte en regard de la face opposée à la face de brossage des déflecteurs verticaux (30a, 30b) délimitant des chicanes verticales canalisant l'écoulement gazeux et empêchant la redéposition sur la face comportant le revêtement de zinc des poussières générées par le brossage.10. Device according to any one of claims 5 to 9 characterized in that it comprises, facing the side opposite to the brushing side of vertical baffles (30a, 30b) defining vertical baffles channeling the gaseous flow and preventing the redeposition on the face comprising the zinc coating of the dust generated by brushing. 11. Dispositif selon la revendication 10, caractérisé en ce que les déflecteurs (30a, 30b) sont séparés dans une zone sensiblement centrale par une paroi (31) en forme de plan incliné, dirigé vers la bande (21), débouchant dans une gouttière (32) de récupération des poussières.11. Device according to claim 10, characterized in that the deflectors (30 a , 30 b ) are separated in a substantially central zone by a wall (31) in the form of an inclined plane, directed towards the strip (21), opening into a dust collecting gutter (32). 12. Dispositif selon la revendication 10, caractérisé en ce que la gouttière (32) est reliée à l'un des circuits d'aspiration (14, 17).12. Device according to claim 10, characterized in that the gutter (32) is connected to one of the suction circuits (14, 17).
EP84401121A 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface Expired EP0162989B1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
AT84401121T ATE33043T1 (en) 1984-05-30 1984-05-30 METHOD AND DEVICE FOR PRODUCTION OF A SHEET METAL OR STRIP GALVANIZED ON AT LEAST ONE SIDE.
EP84401121A EP0162989B1 (en) 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface
DE8484401121T DE3469917D1 (en) 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface
BR8502567A BR8502567A (en) 1984-05-30 1985-05-29 PROCESS OF MANUFACTURING A HOT-GALVANIZED STEEL SHEET BELT EXEMPT FROM PURE ZINC COATING OR ZINC BASE AT LEAST ONE FACE AND BRUSHING DEVICE FOR APPLICATION OF THE PROCESS
CA000482663A CA1225550A (en) 1984-05-30 1985-05-29 Process and device for manufacturing sheet metal or galvanized steel strip devoid of pure zinc coating on at least on side
MX205430A MX162647A (en) 1984-05-30 1985-05-29 PERFECTED PROCEDURE AND DEVICE FOR THE MANUFACTURE OF GALVANIZED STEEL SHEET OR BAND FREE OF ZINC COATING IN AT LEAST ONE OF ITS SIDES
SU3899255A SU1389685A3 (en) 1984-05-30 1985-05-29 Arrangement for manufacturing strip from hot zinc-plated steel
US06/739,080 US4594272A (en) 1984-05-30 1985-05-29 Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
CS385585A CS273605B2 (en) 1984-05-30 1985-05-29 Method of galvanized steel band production,free from zinc coating at least on one side, and equipment for realization of this method
KR1019850003769A KR900000299B1 (en) 1984-05-30 1985-05-30 Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
AU43152/85A AU575650B2 (en) 1984-05-30 1985-05-30 Galvanizing so that at least one side is devoid of a coating
ES544304A ES8609503A1 (en) 1984-05-30 1985-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface.
ES1986292492U ES292492Y (en) 1984-05-30 1986-02-14 DEVICE FOR THE MANUFACTURE OF A GALVANIZED STEEL SHEET BAND FREE OF ZINC COATINGS IN AT LEAST ONE OF ITS SIDES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84401121A EP0162989B1 (en) 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface

Publications (2)

Publication Number Publication Date
EP0162989A1 true EP0162989A1 (en) 1985-12-04
EP0162989B1 EP0162989B1 (en) 1988-03-16

Family

ID=8192890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401121A Expired EP0162989B1 (en) 1984-05-30 1984-05-30 Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface

Country Status (12)

Country Link
US (1) US4594272A (en)
EP (1) EP0162989B1 (en)
KR (1) KR900000299B1 (en)
AT (1) ATE33043T1 (en)
AU (1) AU575650B2 (en)
BR (1) BR8502567A (en)
CA (1) CA1225550A (en)
CS (1) CS273605B2 (en)
DE (1) DE3469917D1 (en)
ES (2) ES8609503A1 (en)
MX (1) MX162647A (en)
SU (1) SU1389685A3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249234A1 (en) * 1986-06-12 1987-12-16 DUMA Konstruktionsbüro Blow-off device for the continuous two-sided coating of strip metal
RU2615392C2 (en) * 2012-02-21 2017-04-04 Кокрий Ментенанс Эт Энженьери С.А. System to reduce gas consumption push-ups in air knife
CN108779542A (en) * 2015-12-24 2018-11-09 Posco公司 Clad steel sheet with small and uniform coating microstructure and clad steel sheet manufacturing method

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE33043T1 (en) * 1984-05-30 1988-04-15 Usinor METHOD AND DEVICE FOR PRODUCTION OF A SHEET METAL OR STRIP GALVANIZED ON AT LEAST ONE SIDE.
CA1328166C (en) * 1988-09-29 1994-04-05 Hidekazu Kawano Two-fluid injection apparatus and a manufacturing apparatus including such injecting apparatus for manufacturing minimized spangle molten plated steel plate
KR20030014529A (en) * 2001-08-11 2003-02-19 재단법인 포항산업과학연구원 Zn coating remove system for section steel
DE102004059200B4 (en) * 2004-12-09 2010-12-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for cooling substrates
DE102006050702A1 (en) * 2006-10-24 2008-04-30 Welser Profile Gmbh Apparatus and method for removing a metal coating
EP2028286A1 (en) * 2007-07-21 2009-02-25 Rasselstein GmbH Method for removing an excess coating on the band edge of galvanised metal coated steel strips
WO2009068700A1 (en) * 2007-11-26 2009-06-04 Alavesa De Trabajos Metalicos, S.L. Method and machine for removing excess metal from galvanised parts
CN105525246B (en) * 2016-03-02 2017-12-01 江苏法尔胜泓昇集团有限公司 A kind of steel-wire galvanizing smears zinc device
CN105525247B (en) * 2016-03-02 2017-12-08 江苏法尔胜泓昇集团有限公司 A kind of steel-wire galvanizing smears zinc method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933401A (en) * 1929-10-01 1933-10-31 Youngstown Sheet And Tube Co Coated metal article and manufacture thereof
DE732591C (en) * 1937-12-28 1943-03-06 Matthias Leuchter Process for the surface refinement of wrought iron, especially craftsmanship
FR1279624A (en) * 1960-12-26 1961-12-22 Armco Steel Corp Process for obtaining sheets or strips having different side coatings
US3260577A (en) * 1961-12-20 1966-07-12 Nat Steel Corp Coated product and its manufacture
US3383189A (en) * 1964-04-16 1968-05-14 Sendzimir Inc T Prevention of white rust on galvanized sheets
US4071643A (en) * 1973-01-24 1978-01-31 The Glacier Metal Company Limited Method of manufacturing bearing material
EP0011547A1 (en) * 1978-11-09 1980-05-28 LAMINOIRS DE STRASBOURG Société dite: Process and apparatus for producing a zinc plate or strip lightly coated on one or both sides, and product obtained by this process
GB1602732A (en) * 1978-04-28 1981-11-18 British Steel Corp Removal of excess liquid coatant from strip

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120997A (en) * 1976-05-11 1978-10-17 Inland Steel Company Process for producing one-side galvanized sheet material
ATE33043T1 (en) * 1984-05-30 1988-04-15 Usinor METHOD AND DEVICE FOR PRODUCTION OF A SHEET METAL OR STRIP GALVANIZED ON AT LEAST ONE SIDE.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933401A (en) * 1929-10-01 1933-10-31 Youngstown Sheet And Tube Co Coated metal article and manufacture thereof
DE732591C (en) * 1937-12-28 1943-03-06 Matthias Leuchter Process for the surface refinement of wrought iron, especially craftsmanship
FR1279624A (en) * 1960-12-26 1961-12-22 Armco Steel Corp Process for obtaining sheets or strips having different side coatings
US3260577A (en) * 1961-12-20 1966-07-12 Nat Steel Corp Coated product and its manufacture
US3383189A (en) * 1964-04-16 1968-05-14 Sendzimir Inc T Prevention of white rust on galvanized sheets
US4071643A (en) * 1973-01-24 1978-01-31 The Glacier Metal Company Limited Method of manufacturing bearing material
GB1602732A (en) * 1978-04-28 1981-11-18 British Steel Corp Removal of excess liquid coatant from strip
EP0011547A1 (en) * 1978-11-09 1980-05-28 LAMINOIRS DE STRASBOURG Société dite: Process and apparatus for producing a zinc plate or strip lightly coated on one or both sides, and product obtained by this process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 4, no. 69(C-11)(551), 22 mai 1980, page 59C11; & JP - A - 55 34670 (HITACHI SEISAKUSHO) 11-03-1980 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249234A1 (en) * 1986-06-12 1987-12-16 DUMA Konstruktionsbüro Blow-off device for the continuous two-sided coating of strip metal
RU2615392C2 (en) * 2012-02-21 2017-04-04 Кокрий Ментенанс Эт Энженьери С.А. System to reduce gas consumption push-ups in air knife
CN108779542A (en) * 2015-12-24 2018-11-09 Posco公司 Clad steel sheet with small and uniform coating microstructure and clad steel sheet manufacturing method
EP3396009A4 (en) * 2015-12-24 2019-01-16 Posco Plated steel sheet having fine and even plating structure and plated steel sheet manufacturing method
CN108779542B (en) * 2015-12-24 2020-08-14 Posco公司 Plated steel sheet having minute and uniform plating texture and method for producing plated steel sheet
US11168389B2 (en) 2015-12-24 2021-11-09 Posco Plated steel sheet having fine and even plating structure

Also Published As

Publication number Publication date
AU575650B2 (en) 1988-08-04
EP0162989B1 (en) 1988-03-16
DE3469917D1 (en) 1988-04-21
SU1389685A3 (en) 1988-04-15
ES292492Y (en) 1987-02-16
KR900000299B1 (en) 1990-01-25
KR850007985A (en) 1985-12-11
CS385585A2 (en) 1990-08-14
BR8502567A (en) 1986-02-04
ES292492U (en) 1986-06-01
CA1225550A (en) 1987-08-18
US4594272A (en) 1986-06-10
ES544304A0 (en) 1986-09-01
MX162647A (en) 1991-06-10
ES8609503A1 (en) 1986-09-01
CS273605B2 (en) 1991-03-12
ATE33043T1 (en) 1988-04-15
AU4315285A (en) 1985-12-05

Similar Documents

Publication Publication Date Title
EP0162989B1 (en) Process and device for producing a galvanized steel sheet or strip not coated by pure zinc at at least one surface
FR2598587A1 (en) APPARATUS FOR WELDING PRINTED CIRCUIT BOARDS
FR2566688A1 (en) METHOD AND DEVICE FOR CONTINUOUS CASTING OF METAL FUSION BATH, ESPECIALLY STEEL FUSION BATH
CA1288042C (en) Contaminated gas washer apparatus
FR2501724A1 (en) METHOD AND APPARATUS FOR CONTINUOUS COATING OF A FERROUS METAL STRIP
EP0011547B1 (en) Process and apparatus for producing a zinc plate or strip lightly coated on one or both sides, and product obtained by this process
EP0124408A1 (en) Apparatus for the continuous coating of a strip, especially for galvanizing a steel sheet
EP1334216B1 (en) Method and installation for dip coating of a metal strip, in particular a steel strip
EP0531501B1 (en) Method and device for deburring a steel strip cut into slabs
FR2572970A1 (en) HEATING DEVICE FOR GENERATING A WELDING WAVE FOR A WAVE WELDING MACHINE
FR2541318A1 (en) DEVICE FOR SEPARATING A FLOW OF AIR FROM DISPERSED FIBER FLAKES, FOR EXAMPLE IN A FLAKE SUPPLY OF A CARD
FR2552448A1 (en) APPARATUS FOR CONTINUOUSLY COOLING A HEATED METAL PLATE
EP0031772B1 (en) Process and apparatus for making float glass
FR2504036A1 (en) METHOD AND DEVICE FOR PREVENTING OXIDATION OF COPPER SLABS AT THE OUTPUT OF A CONTINUOUS CASTING MACHINE
FR2528716A1 (en) IMPROVEMENTS ON AIR FILTERS
FR2833871A1 (en) Trimming the edges of a continuously cast thin metal strip involves cooling edge zones are to make them more brittle directly before cutting the edges away
WO2018108747A1 (en) Method and section for quick cooling of a continuous line for treating metal belts
BE1009193A3 (en) Method for inclusion of neutraliser located in hot water table of mineral wool and device for implementing the method.
FR2485569A1 (en) HOT IMMERSION METALLIZATION APPARATUS OF A FACE OF A BAND
BE1005137A6 (en) Method and device for descaling metal product of hot rolled.
EP0290423B1 (en) Device for continuously manufacturing a thin metal strip
FR2591128A1 (en) Process and device for enriching the decanted phase in treatments for separation by flotation of oily or similar materials contained in a contaminated liquid
EP0467807A1 (en) Method of and installation for controlling thickness of thin continuous casting strips of electroconductive material
FR2732039A1 (en) Pneumatic drying device for hot galvanised metal strip
BE850801A (en) CONTINUOUS ELEMENT COOLING PROCESS AND DEVICE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19850525

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19860908

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 33043

Country of ref document: AT

Date of ref document: 19880415

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3469917

Country of ref document: DE

Date of ref document: 19880421

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 84401121.3

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20030415

Year of fee payment: 20

Ref country code: AT

Payment date: 20030415

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030416

Year of fee payment: 20

Ref country code: LU

Payment date: 20030416

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030417

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030512

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030516

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030523

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030603

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040529

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040529

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040530

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040530

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040530

BE20 Be: patent expired

Owner name: UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANC

Effective date: 20040530

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20040530