EP3408424B1 - Dispositif pour la stabilisation hydrodynamique d'une bande métallique en défilement continu - Google Patents

Dispositif pour la stabilisation hydrodynamique d'une bande métallique en défilement continu Download PDF

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Publication number
EP3408424B1
EP3408424B1 EP17700271.4A EP17700271A EP3408424B1 EP 3408424 B1 EP3408424 B1 EP 3408424B1 EP 17700271 A EP17700271 A EP 17700271A EP 3408424 B1 EP3408424 B1 EP 3408424B1
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European Patent Office
Prior art keywords
strip
pads
installation according
liquid metal
coating
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EP17700271.4A
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German (de)
English (en)
French (fr)
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EP3408424A1 (fr
Inventor
Maïwenn LARNICOL
Yves Hardy
Olivier BREGAND
Pascal GERKENS
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Centre de Recherches Metallurgiques CRM ASBL
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Centre de Recherches Metallurgiques CRM ASBL
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Publication of EP3408424A1 publication Critical patent/EP3408424A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/06—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length by rubbing contact, e.g. by brushes, by pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/06—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with a blast of gas or vapour
    • 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
    • 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
    • C23C2/003—Apparatus
    • 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
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • 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
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
    • 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
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates
    • 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
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/51—Computer-controlled implementation
    • 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades

Definitions

  • the present invention relates to a hydrodynamic dissipative device making it possible to stabilize a continuously moving metal strip passing through wipers at the end of a dip coating operation.
  • the invention relates more particularly to the field of hot dip galvanizing of a continuously moving steel strip.
  • the hydrodynamic stabilization of the strip is carried out at the outlet of the liquid metal bath, in the vicinity of the wringing device.
  • dip coating constitutes a method which is both simple and effective for depositing a coating on the surface of an object.
  • the object to be coated is immersed in a bath comprising the product which it is desired to deposit on said object.
  • the object is then removed from the bath with removal of the excess liquid and the coating is made solid, for example by drying, solidification, polymerization, etc.
  • the coated part After passing through the liquid metal bath, the coated part undergoes the spinning operation.
  • This operation is one of the most important in the dip coating process because it allows control of the final coating thickness.
  • the spin must be homogeneous over the entire surface of the product, that is to say the width for a strip and the circumference for a wire, and over the entire length of the product to be coated.
  • this operation must strictly limit the deposit to the target value, which is usually expressed either in terms of the thickness deposited - typically from 3 to 50 ⁇ m - or by weight of the layer deposited per unit of surface - typically in gr / m 2 .
  • spinning is generally carried out by means of blades or gas jets, linear in the case of bands and circular in the case of wires, coming from slots and most often directed perpendicular to the surface to be treated.
  • the gas blades act as "pneumatic scrapers” and have the advantage of operating without mechanical contact and therefore without the risk of scratching the object being treated.
  • Such blades are called “gas extractors” or “spin knives”.
  • the pressurized gas used is either air or a neutral gas such as nitrogen in the most delicate applications such as the treatment of steel strips intended for the manufacture of visible parts for the bodywork of automobiles. .
  • the final thickness of the coating depends in particular on the speed of travel of the strip, the distance between the strip and the wiping knives and, finally, the action exerted by the jet of compressed gas on the strip.
  • the document JP 56 153 136 A proposes to have at least one pair of stabilizers or pneumatic shock absorbers at positions such that the vibrating length between the bottom roller and the upper roller is reduced, which are fixed points for the strip.
  • the document JP 56 084452 A proposes using a pneumatic stabilizer in which part of the injected fluid flows along the strip in the opposite direction to that from the wipers.
  • the document JP 2005298908 A suggests avoiding splashing by combining an air cushion with a scraper, where the gas mixes with the liquid to pass under the scraper.
  • the electromagnetic methods are based on the following principle. Conductors in which a high frequency current flows are installed on both sides of the steel strip. They induce eddy currents in the phase opposition currents. The interaction between the inductive currents and the induced eddy currents generates a magnetic pressure tending to stabilize the steel strip. Another solution is to use electromagnets. However, methods of this type involve additional control because of the magnetic attraction force, which tends to make the strip unstable. Furthermore, it is known that the high frequency currents used cause a rise in temperature in the band, which is contrary to what is sought in this stage of the process.
  • the object of the present invention is to propose a solution to the problem of stabilization of a metal strip in continuous movement which makes it possible to overcome the drawbacks of the prior art.
  • the present invention aims to stabilize and / or dampen the vibrations of the strip at the outlet of a bath of liquid metal by means of hydrodynamic means which make it possible to dissipate the vibration energy generated in the strip by the installation. .
  • the invention also aims to avoid, as suggested in the prior art, the use of additional gas jets in the immediate vicinity of the wipers which would be liable to affect the appearance of the final product.
  • the object of the invention is also to remove the tape, and more generally to improve the flatness of the tape very close to the place where the final thickness of the coating is produced, that is to say at wringers right, as well as guaranteeing a uniform coating thickness in the plane of the strip.
  • the invention also pursues the aim of providing a solution to the problem of splashing encountered at high scrolling speed.
  • the present invention relates to a dip coating installation of a continuously moving metal strip, comprising a bath of liquid metal coating from which the strip emerges in vertical strand, a bottom roller, a stripper roller and if necessary a stabilizing roller, all immersed in the liquid metal bath, wiping knives placed at the outlet of the bath and injecting a gas under pressure to remove the excess coating not yet solidified, creating a wiping wave having a return flow of downwardly directed liquid metal, as well as a dissipative hydrodynamic stabilization device placed between the spin knives and the last submerged roller, comprising a plurality of hydrodynamic pads intended for loading on at least one side of the metal strip and pivotally mounted around joints for self-alignment thereof, further extending transversely across the width of the strip, and positioned so that in use, the return flow of liquid metal from the wiping wave flows at least partially over the back of the skids, that is to say on the face of those -this not facing the metal strip in continuous movement.
  • the installation of the invention will find a preferred application in the context of an industrial process of hot-dip continuous coating of a metal strip having a running speed preferably between 0.5 and> 3 m / s (30 and > 180 m / min), more preferably up to 10 m / s (600 m / min).
  • the metal strip will preferably consist of steel, aluminum, zinc, copper or one of their alloys.
  • the thickness of the metal strip will preferably be between 0.15 and 5 mm.
  • the molten coating metal will preferably comprise zinc, aluminum, tin, magnesium, silicon or an alloy of at least two of these elements.
  • the thickness of the metallic coating layer obtained after spinning will preferably be between 3 and 50 ⁇ m.
  • the pressurized gas injected by the gas extractors will preferably be air, nitrogen or carbon dioxide.
  • the figure 1 shows a vertical sectional view of the hydrodynamic stabilization device of a metal strip according to the present invention.
  • the figure 2 shows a top view of the strip between the spin knives, schematically showing the distance Z between the knives and the ideal reference plane of the strip, the bending defect ⁇ z) c and the displacement ⁇ z) v corresponding to the vibrations.
  • the figure 3 represents respectively a sectional view of the spin wave showing schematically the phenomenon of splashing, on the one hand and of the spin wave in the presence of the end of the hydrodynamic pad, on the other hand.
  • the figure 4 shows an elevational view of three preferred embodiments of the present invention, relating to the channels present on the back of each pad on the one hand and relating to the interface between contiguous pads on the other hand.
  • the figure 5 shows a plan view of two preferred embodiments of the present invention, showing the relative arrangement of the pads on either side of the strip, according to its lack of camber relative to a reference plane.
  • the figure 1 shows schematically a preferred embodiment of the hydrodynamic stabilization device of the invention arranged in front of the steel strip 1 driven in a continuous upward movement (that is to say in vertical strand), after passage by the bottom roller 4, by the descaling roller 5a and possibly by the stabilizing roller 5b of the bath of liquid zinc 2 and before its passage to the right of the spinning knives 3.
  • the device of the invention is essentially in the form of at least one, but generally several, hydrodynamic pads 6 self-aligned (or self-aligning), pivotally mounted around a joint 7.
  • the term "pads” means devices rigid planes such as plates. They can either be placed outside the bath 2, or have a partially submerged part 8, or even be completely submerged.
  • the loading of the pads 6 aims to balance the hydrodynamic lift generated within the film of liquid metal at the strip-pad interface but also to flatten the strip 1 at its exit from the bath 2.
  • fully emerged or completely submerged pads 6 advantageously make it possible to avoid trapping the foam found on the surface of the bath mainly at the start of the line, while fully emerged pads promote stabilization as close as possible to the wipers. .
  • partially or completely submerged pads 6 make it possible to promote the preheating and the temperature maintenance of the pad by heat conduction via direct contact with the bath. This also makes it possible to take advantage of the speed profile in the vicinity of the strip, just before it leaves the bath and thus significantly improve the hydrodynamic lift (Rhydrodyn.), The thicknesses at the interface and therefore the operating safety vis- against a risk of contact between the pads and the strip.
  • the camber defects ⁇ z) c and the displacements ⁇ z) v due to the vibrations will correspond to variations in coating thickness.
  • the strip is closer to a spinning knife than the reference plane 12 which is by definition equidistant Z from the spinning knives, the final coating thickness will be smaller, and vice versa.
  • the camber leads to a continuous variation in thickness over the strip width.
  • the vibrations in rigid or "string” mode lead to an alternation of variations in thickness in the direction of travel, while the vibrations of higher order (“twisting" or “flapping") lead to variations affecting the longitudinal direction as much than the transverse direction.
  • the device presented here therefore aims to overcome these different variations in order to obtain a flat and stable strip at right angles to the spinning knives and consequently to guarantee a uniform coating thickness in the two directions of the plane of the strip. .
  • each pad 6 takes place on at least one side of the strip 1, and extend transversely essentially over the entire width of the strip 1. Also for the reason explained above, the back of each pad 6 advantageously has at least a channel or grooves 17 allowing the channeling of the return flow outside the supports of the joints.
  • the pads 6 are optionally separated by a certain distance in the transverse direction and are essentially parallel to each other. Otherwise, they can possibly be in contact via a ceramic felt 18 or can be nested thanks to an added baffle 19 at their adjacent sides opposing the flow. ascending, which limits the risk of having an excess coating there, after spinning.
  • the pads 6 are staggered on either side of the strip 1 shown with its lack of camber relative to the reference plane 12.
  • an industrial programmable controller (PLC) can be added to the device for better control of the result, advantageously allowing a measurement of the camber, an analysis of the fault and a closed-loop correction of the forces (Fi).
  • the pads 6 face each other on the strip 1.
  • a PLC closed-loop measurement, analysis and correction system can be advantageously considered.
  • the invention makes it possible, at least under certain operational conditions, to do without the stripper roller 5a and the stabilizing roller 5b, which is all the more advantageous since these generate additional vibrations following the wear of their bearings. submerged, that they also generate mattes and that their maintenance as well as their replacement require line shutdowns impacting plant productivity.
  • the spring-shock absorber assembly 10 could simply be replaced by the “compressed air-internal friction” assembly of the jack.
  • ⁇ b> ⁇ u> List of reference symbols ⁇ /u> ⁇ /b> 1
  • Steel strip 9 Pneumatic jack 2
  • Liquid zinc bath 10 Spring / shock absorber 3
  • Spinning knives 11 Spin wave 4
  • Bottom roll 12 Reference plane 5a
  • Stripper roller 13 Upward flow 5b Stabilizing roller 14
  • Hydrodynamic pads 15 Droplets (splashing) 7 Skate joint 16 Tapered shoe end 8 Submerged skate part 17 Channel (groove) 18 Ceramic felt 21 Industrial programmable controller (PLC) 19 Nested skates (chicane) 20
  • PLC Industrial programmable controller

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Coating With Molten Metal (AREA)
  • Coating Apparatus (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP17700271.4A 2016-01-29 2017-01-10 Dispositif pour la stabilisation hydrodynamique d'une bande métallique en défilement continu Active EP3408424B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17700271T PL3408424T3 (pl) 2016-01-29 2017-01-10 Urządzenie do stabilizacji hydrodynamicznej taśmy metalowej przesuwającej się w sposób ciągły

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2016/5073A BE1023837B1 (fr) 2016-01-29 2016-01-29 Dispositif pour la stabilisation hydrodynamique d'une bande metallique en defilement continu
PCT/EP2017/050379 WO2017129391A1 (fr) 2016-01-29 2017-01-10 Dispositif pour la stabilisation hydrodynamique d'une bande métallique en défilement continu

Publications (2)

Publication Number Publication Date
EP3408424A1 EP3408424A1 (fr) 2018-12-05
EP3408424B1 true EP3408424B1 (fr) 2020-03-18

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EP17700271.4A Active EP3408424B1 (fr) 2016-01-29 2017-01-10 Dispositif pour la stabilisation hydrodynamique d'une bande métallique en défilement continu

Country Status (14)

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US (1) US10550459B2 (zh)
EP (1) EP3408424B1 (zh)
JP (1) JP6869248B2 (zh)
KR (1) KR20180103992A (zh)
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EP3408424A1 (fr) 2018-12-05
BE1023837A1 (fr) 2017-08-08
ES2790198T3 (es) 2020-10-27
BR112018015424B1 (pt) 2022-04-12
PL3408424T3 (pl) 2020-08-10
US20190032188A1 (en) 2019-01-31
JP6869248B2 (ja) 2021-05-12
CN109072395B (zh) 2021-02-26
JP2019504926A (ja) 2019-02-21
BR112018015424A2 (pt) 2018-12-18
UA122708C2 (uk) 2020-12-28
US10550459B2 (en) 2020-02-04
BE1023837B1 (fr) 2017-08-09
KR20180103992A (ko) 2018-09-19
ZA201804419B (en) 2019-05-29
CA3011266A1 (fr) 2017-08-03
CN109072395A (zh) 2018-12-21
RU2715933C2 (ru) 2020-03-04
RU2018128792A3 (zh) 2020-03-03
CA3011266C (fr) 2023-05-02
WO2017129391A1 (fr) 2017-08-03
RU2018128792A (ru) 2020-03-03

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