EP0107555A1 - Procédé de production en continu d'une bande métallique revêtue et éventuellement formée - Google Patents

Procédé de production en continu d'une bande métallique revêtue et éventuellement formée Download PDF

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Publication number
EP0107555A1
EP0107555A1 EP83401947A EP83401947A EP0107555A1 EP 0107555 A1 EP0107555 A1 EP 0107555A1 EP 83401947 A EP83401947 A EP 83401947A EP 83401947 A EP83401947 A EP 83401947A EP 0107555 A1 EP0107555 A1 EP 0107555A1
Authority
EP
European Patent Office
Prior art keywords
coating
carried out
alloy
bath
sheet
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.)
Withdrawn
Application number
EP83401947A
Other languages
German (de)
English (en)
French (fr)
Inventor
Guy Gerard
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.)
Fabrique de Fer de Maubeuge
Original Assignee
Fabrique de Fer de Maubeuge
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
Application filed by Fabrique de Fer de Maubeuge filed Critical Fabrique de Fer de Maubeuge
Publication of EP0107555A1 publication Critical patent/EP0107555A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • 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
    • C23C2/26—After-treatment
    • 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
    • C23C2/26—After-treatment
    • C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
    • 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
    • C23C2/26—After-treatment
    • C23C2/265—After-treatment by applying solid particles to the molten coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/10—Applying the material on both sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/60—Adding a layer before coating
    • B05D2350/65—Adding a layer before coating metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0281—After-treatment with induction heating

Definitions

  • the production of painted corrugated or ribbed sheets has three separate manufacturing lines: a galvanizing line comprising heat and mechanical treatment stations before and after the galvanizing tank in which a strip of sheet flows from a coil supply to a winding station; a paint line supplied with galvanized strip in coils from the galvanization line and which comprises, before the paint application station, mechanical and chemical preparation stations for the strip and, after the latter, baking and cooling stations painted tape, as well as a winding station; finally, a forming line supplied by coils of galvanized or painted sheet metal which essentially comprises an installation for unwinding and leveling the product, a cross-cutting station and a forming installation comprising sets of rollers for producing corrugations or ribs on the sheets from the cutting station.
  • a galvanizing line comprising heat and mechanical treatment stations before and after the galvanizing tank in which a strip of sheet flows from a coil supply to a winding station
  • a paint line supplied with galvanized strip in coils from the galvanization line which comprises
  • the invention intends to overcome these drawbacks by proposing a new design for such a production guided by the desire to integrate the above-mentioned phases in a single production line. To do this, it relates to a manufacturing process according to which the product continuously scrolls past a succession of stations judiciously selected according to their mutual compatibility in order to carry out the various treatments of the strip allowing to obtain a finished product under optimal yield conditions both from the point of view of cost and that of quality.
  • the subject of the invention is therefore a process for the continuous production of a coated sheet metal, metal strip or the like, consisting of hot depositing thereon by suitable means a coating of zinc alloy and then covering at least one face of said sheet thus galvanized with at least one primary coating layer at the outlet of the galvanizing bath.
  • the galvanization being carried out by soaking in a bath of the above-mentioned alloy, a pneumatic spinning of the coating alloy is carried out successively on the same line of movement of the product. using a neutral fluid and in a non-oxidizing atmosphere carried out above the bath, to a miniflowering of the coating by spraying of powder before crystallization of the above-mentioned alloy, to a regulation of the temperature of the sheet, to an application by appropriate means of the above-mentioned primary layer and to baking said primary layer.
  • lacquering, drying or polymerization of this lacquer will then be carried out by any known means suitable for the quality of the coating product, such as ultraviolet, infrared radiation, electronic bombardment, high frequency currents or, preferably, by induction.
  • the method according to the invention may also include, on the same line of movement of the product, a longitudinal forming phase of the latter followed or preceded by a transverse cutting phase.
  • this strip emerges from a bath of molten zinc alloy 2.
  • this strip (running in the direction A) enters a chamber 3 of non-oxidizing atmosphere in which a pneumatic spinning of the covering metal is ensured by blowing nozzles 4 of a neutral gas such as, for example, nitrogen.
  • a neutral gas such as, for example, nitrogen.
  • This known technique consists, by means of a pressurized nitrogen blade, of adjusting the thickness of the zinc film which it is desired to have hung on the faces of the metal strip.
  • a zinc powder is sprayed onto the faces of the strip, by means of an appropriate device, which makes it possible to minimize “flowering", that is to say the size of the crystals of zinc.
  • the “mini-flowering” thus obtained, associated with the almost total absence of oxidation due to the non-oxidizing atmosphere of the enclosure 3, constitutes optimal surface condition conditions for the deposition of a primary layer of a coating product or even a lacquer.
  • a judicious adjustment of the powder projection will promote the deposition of said primer or lacquer.
  • a temperature regulation of the strip is ensured by means of the device 6.
  • the temperatures involved in the zinc bath and, during the preheating of the strip, the running speed ... the quantity of heat stored in the strip may be too low or too great for the following operation consisting in the application of a primer or a lacquer by means of the device 7.
  • On may therefore need either reheat, or cool the strip so that the application of "paint” is carried out under optimal conditions, in order to best use the heat of the strip for the "drying" of the deposited layer, electrostatically, from a powder composition or a liquid composition.
  • this layer will therefore be baked, if necessary by putting into service a baking or polymerization drying oven 7a placed on the line after the device 7.
  • the lacquering station is represented at 9. At this point, the deposition of the lacquer can be done by coating with a liquid paint or by a deposition of powder.
  • the device 6 will be used to cool the strip 1 before it passes through the device 8 for a "skin-pass", the stations 7 and 7a being out of service. There will then be provided at the outlet of the device 8 a device for reheating the strip (not shown) which will allow the deposition of the lacquer on a hot strip, which may have certain advantages for the drying of the painted strip.
  • the strip On leaving the coating station 9, the strip enters a drying tunnel 10, the heating means of which will be adapted to the nature of the paint used. Among these means, an induction heating system will be preferred which makes it possible to establish a decreasing heat gradient in the coating from the steel to the periphery of the coating. Thus, the paint closest to the metal will dry first. The vaporizable compounds which it contains under the effect of heat can then easily pass through the external parts of paint which subsequently dries.
  • the metal strip 1 is at the end of the tunnel 10, led to scroll in the direction of a shears 11, passing through a reserve well, to allow the strip to stop when it is cut without the continuous nature of the scrolling at previous posts either interrupted or disrupted.
  • strip sections 1a, 1b ... which are conveyed in a machine 12 for longitudinal forming provided with a plurality of forming rollers to create either corrugations or ribs in each section.
  • the forming machine 12 can be fed directly out of the tunnel 11, the cross section being made on the profiled product.
  • the method according to the invention eliminates all the operations of winding and intermediate unwinding of the product and all the defects or drawbacks inherent in these operations, such as the necessary intermediate preparations. There is also a gain with regard to the means of transport, the space for creating intermediate stocks and the much reduced manpower required with the process of the invention.
  • the invention finds an interesting application in the field of sheet metal metallurgy.

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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)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP83401947A 1982-10-06 1983-10-05 Procédé de production en continu d'une bande métallique revêtue et éventuellement formée Withdrawn EP0107555A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216755 1982-10-06
FR8216755A FR2534277A1 (fr) 1982-10-06 1982-10-06 Procede de production en continu d'une bande metallique revetue et eventuellement formee

Publications (1)

Publication Number Publication Date
EP0107555A1 true EP0107555A1 (fr) 1984-05-02

Family

ID=9278025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401947A Withdrawn EP0107555A1 (fr) 1982-10-06 1983-10-05 Procédé de production en continu d'une bande métallique revêtue et éventuellement formée

Country Status (2)

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EP (1) EP0107555A1 (enExample)
FR (1) FR2534277A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176109A1 (en) * 1984-09-28 1986-04-02 Nisshin Steel Co., Ltd. A combined continuous plating apparatus for hot-dip plating and vacuum deposition plating
FR2601700A1 (fr) * 1986-07-18 1988-01-22 Gerard Guy Unite de traitement en ligne de produits metalliques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446335A (fr) * 1965-04-09 1966-07-22 Strasbourg Forges Perfectionnements apportés à la fabrication de produits et notamment de tôles galvanisées à chaud
FR1538429A (fr) * 1967-07-11 1968-09-06 Perfectionnement aux procédés et aux installations de chauffage et de revêtement à chaud en continu par immersion dans un bain de métal en fusion de matériaux métalliques divers
GB2050867A (en) * 1979-05-16 1981-01-14 Nisshin Steel Co Ltd Resin coated zinc plated steel plate and container fabricated from same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446335A (fr) * 1965-04-09 1966-07-22 Strasbourg Forges Perfectionnements apportés à la fabrication de produits et notamment de tôles galvanisées à chaud
FR1538429A (fr) * 1967-07-11 1968-09-06 Perfectionnement aux procédés et aux installations de chauffage et de revêtement à chaud en continu par immersion dans un bain de métal en fusion de matériaux métalliques divers
GB2050867A (en) * 1979-05-16 1981-01-14 Nisshin Steel Co Ltd Resin coated zinc plated steel plate and container fabricated from same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176109A1 (en) * 1984-09-28 1986-04-02 Nisshin Steel Co., Ltd. A combined continuous plating apparatus for hot-dip plating and vacuum deposition plating
FR2601700A1 (fr) * 1986-07-18 1988-01-22 Gerard Guy Unite de traitement en ligne de produits metalliques
EP0254633A1 (fr) * 1986-07-18 1988-01-27 Guy Gerard Unité de traitement en ligne de produits métalliques
WO1988000619A1 (fr) * 1986-07-18 1988-01-28 Guy Gerard Unite de traitement en ligne de produits metalliques

Also Published As

Publication number Publication date
FR2534277A1 (fr) 1984-04-13
FR2534277B1 (enExample) 1985-02-08

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

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Effective date: 19840919

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Effective date: 19860325

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Inventor name: GERARD, GUY