EP0744222A1 - Verfahren und Vorrichtung zum Beschichten eines metallischen Bandes - Google Patents

Verfahren und Vorrichtung zum Beschichten eines metallischen Bandes Download PDF

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Publication number
EP0744222A1
EP0744222A1 EP96400929A EP96400929A EP0744222A1 EP 0744222 A1 EP0744222 A1 EP 0744222A1 EP 96400929 A EP96400929 A EP 96400929A EP 96400929 A EP96400929 A EP 96400929A EP 0744222 A1 EP0744222 A1 EP 0744222A1
Authority
EP
European Patent Office
Prior art keywords
solvents
oven
gas
injected
tunnel
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
EP96400929A
Other languages
English (en)
French (fr)
Other versions
EP0744222B1 (de
Inventor
Didier Delaunay
Hugues Amaury Jean Vialla
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.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
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=9479301&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0744222(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0744222A1 publication Critical patent/EP0744222A1/de
Application granted granted Critical
Publication of EP0744222B1 publication Critical patent/EP0744222B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • the present invention relates to a method and a device for depositing and drying a protective or decorative coating on a continuously moving metal strip.
  • paint This contains organic or aqueous solvents and, after the deposition of the paint layer on the strip, the assembly is heated in order to facilitate the evaporation of the solvents and to allow the paint to cook. For safety reasons, and in order to control polluting emissions, the solvents thus evaporated are continuously extracted in order to be possibly incinerated.
  • the heating of the strip provided with its paint coating can be carried out by various means, in particular by blowing hot air or infrared or electromagnetic induction heating systems.
  • Heating by electromagnetic induction has the advantage of heating the paint by the substrate (that is to say by the strip), the heat flow propagating towards the outside, which facilitates the evaporation of the solvents.
  • this heating mode has the characteristic of heating only the metal strip, the atmosphere and the walls of the oven remaining relatively cold. If this characteristic brings the advantage of limiting heat losses, it has in particular the disadvantage of causing a recondensation of the evaporated solvents on the coldest parts of the oven walls, the temperature of which is generally lower than the dew point of the solvents.
  • the water cooling circuits of the coils of the electromagnetic induction heating device also constitute preferred condensation points.
  • the resulting condensates are particularly troublesome when they fall on the coating freshly deposited on the strip, or on the rollers for applying the coating in contact with the latter. As a result, the coating is no longer uniform, which implies a defect in appearance and possibly protection.
  • the present invention has therefore set itself the objective of avoiding such recondensations of the solvents and the principle which it implements consists firstly in raising the temperature of the atmosphere of the furnace beyond the dew point of the solvents and on the other hand, to separate the atmosphere from the cold spots thanks to a particular design of the oven tunnel.
  • the present invention relates, firstly, to a method of protective or decorative coating of a continuously moving metal strip according to which said strip, after having received its coating, is heated by electromagnetic induction in a tunnel oven to evaporate the solvents and ensuring the baking of the coating, the solvents being continuously extracted from the enclosure of said oven, characterized in that a gas chosen is injected into the oven so that the internal walls of said oven are at a temperature above the point dew of solvents and making the oven gas-tight and thermally insulated to keep internal walls hot above this dew point.
  • the present invention secondly also relates to a device for implementing the method as defined above, consisting of a tunnel oven continuously traversed by the metal strip and comprising at least one inductor for heating the strip , this device being characterized in that the internal walls of said tunnel furnace are thermally insulated and gas tight, said walls being transparent to the electromagnetic field and non-electrically conductive and in that means are provided for injecting hot gas respectively at the inlet and outlet of the tunnel oven and at least one suction point for the atmosphere of the oven loaded with solvents.
  • the oven according to the present invention is in the form of a tunnel oven comprising an outer casing 4 and through which the metal strip 1, to be provided with a protective or decorative coating, moves continuously.
  • the tunnel oven comprises two sections of oven each provided with their inductor. This tunnel follows the oven pass line which can be vertical, horizontal (as illustrated in the figures) or oblique.
  • This furnace is heated by electromagnetic induction and the cooled turns of the inductors are shown diagrammatically at 5. This induction heating ensures, in known manner, on the one hand the cooking of the coating previously deposited on the strip 1 and on the other hand, the evaporation of the solvents contained in the coating material.
  • a gas is injected into the tunnel 2, at a temperature chosen so that the internal walls of the furnace are at a temperature above the dew point of the solvents.
  • This temperature will depend on the characteristics of the solvents used and it may possibly be higher than the final temperature of the strip. It will generally be greater than 100 ° C and, in the case of organic solvents, it will preferably be of the order of 150 ° C.
  • the invention also provides a device for regulating the temperature of the injected gas.
  • the gas thus injected will generally be air; however, one can choose a gas which has any composition.
  • Figure 1 there is shown at 7, the injection sheath of the preheated gas. In this figure, we see that the injection of gas takes place at the inlet and outlet of the oven.
  • the oven has a system for extracting the atmosphere from the oven loaded with solvents.
  • Figure 1 there is shown in 6 the suction sheath of this atmosphere.
  • the extraction of the atmosphere loaded with solvents can be carried out either at a single point or at several points.
  • the oven comprises several separate inductors, as illustrated in the nonlimiting embodiment shown in FIG. 1, the extraction is carried out, preferably between two inductors. Of course, the extraction rate must remain in accordance with safety standards.
  • the solvents thus extracted are used to preheat the gas injected according to the process specified above.
  • the method of the invention also provides for making the oven gas-tight and thermally insulated in order to keep the internal walls hot.
  • the oven is waterproof with respect to solvents, transparent to the magnetic field and it has good thermal insulation and good mechanical strength.
  • the system for assembling the tunnel 2 to the field coils 5 and the various tunnel elements between them is designed so as not to substantially modify these properties.
  • each sealed tunnel section 2 there is shown diagrammatically at 3 the thermal insulation which is provided according to the invention in each sealed tunnel section 2.
  • This thermal insulation can be produced according to any known, appropriate technique.
  • a paint is applied continuously applied to both sides of a strip of steel circulating horizontally.
  • the thickness of the strip varies from 0.3 to 2.5 mm and its width from 700 to 1500 mm. Its speed is between 30 and 150 m per minute and the metal flow can reach 60 tonnes per hour.
  • the oven composed of three inductors, has a total length of around 11 m.
  • the present invention is not limited to the exemplary embodiments and implementation, nor to the exemplary embodiment, described and mentioned above, but that it encompasses all variants thereof.
  • the pass line of the strip can be either vertical, oblique or horizontal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • General Induction Heating (AREA)
  • Coating Apparatus (AREA)
  • Furnace Details (AREA)
  • Coating With Molten Metal (AREA)
EP96400929A 1995-05-23 1996-04-30 Verfahren zum Beschichten eines metallischen Bandes Revoked EP0744222B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9506141A FR2734501B1 (fr) 1995-05-23 1995-05-23 Procede et dispositif de revetement de bandes metalliques
FR9506141 1995-05-23

Publications (2)

Publication Number Publication Date
EP0744222A1 true EP0744222A1 (de) 1996-11-27
EP0744222B1 EP0744222B1 (de) 2001-03-14

Family

ID=9479301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400929A Revoked EP0744222B1 (de) 1995-05-23 1996-04-30 Verfahren zum Beschichten eines metallischen Bandes

Country Status (5)

Country Link
US (1) US5768799A (de)
EP (1) EP0744222B1 (de)
AT (1) ATE199664T1 (de)
DE (2) DE69612031T2 (de)
FR (1) FR2734501B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000240A1 (de) * 1996-06-29 1998-01-08 Ema Elektro-Maschinen-Schultze Gmbh & Co. Kg Vorrichtung und ein verfahren zum beschichten eines werkstücks
DE10130342C1 (de) * 2001-06-20 2003-02-06 Inductotherm Coating Equipment Verfahren und Vorrichtung zum Trocknen und/oder Einbrennen einer auf ein metallisches Band aufgebrachten Beschichtung
WO2012163334A1 (de) * 2011-05-27 2012-12-06 Thermprotec Gmbh Verfahren und anordnung zur herstellung eines beschichteten metallbandes
CN101767083B (zh) * 2009-12-25 2013-04-17 蚌埠国威滤清器有限公司 滤清器表面粉末固化设备
US9789514B2 (en) 2008-05-08 2017-10-17 Primetals Technologies France SAS Method of drying and/or curing an organic coating on a continuously running metal strip, and device for implementing this method

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6393044B1 (en) * 1999-11-12 2002-05-21 Inductotherm Corp. High efficiency induction melting system
JP2002287317A (ja) * 2001-03-28 2002-10-03 Fuji Photo Film Co Ltd 乾燥装置
FR2832940A1 (fr) * 2001-12-04 2003-06-06 Stein Heurtey Procede de sechage de revetement de bandes metalliques par chauffage par induction
FR2846261B1 (fr) * 2002-10-25 2005-01-21 Myriad Procede de sechage d'un revetement de bande metallique
AU2003900491A0 (en) * 2003-02-04 2003-02-20 Bhp Steel Limited Method of curing a substrate
FR2857734B1 (fr) 2003-07-16 2005-09-02 Stein Heurtey Procede et dispositif de sechage d'un revetement non metallique sur une bande d'acier
US20090057301A1 (en) * 2007-08-28 2009-03-05 Jean Lovens Electric induction heating apparatus with fluid medium flow through
DE102008015658A1 (de) 2008-03-25 2009-11-12 Gesellschaft für aero- und thermodynamische Verfahrenstechnik mbH Vorrichtung und Verfahren zur Erwärmung von Metallbändern
FR2958563A3 (fr) 2010-04-13 2011-10-14 Fives Stein Procede et dispositif de revetement de bandes metalliques.
US20130115384A1 (en) 2011-11-04 2013-05-09 Armando Sáenz-CHAPA Continuous method for applying a cover over a metallic sheet
ES2733719T3 (es) 2012-10-18 2019-12-02 Fives Stein Bilbao S A Proceso e instalación para aplicar un revestimiento protector o decorativo a una banda metálica
EP3928879A1 (de) 2016-12-27 2021-12-29 SABIC Global Technologies B.V. Trocknung einer beschichtung mittels elektromagnetischer strahlung oder erwärmung einer trommel
ES2880200T3 (es) * 2018-07-02 2021-11-23 Zortrax Spolka Akcyjna Un dispositivo y un método para alisar con vapor de disolvente una superficie de un producto plástico
EP3590693B1 (de) * 2018-07-02 2021-06-16 Zortrax Spolka Akcyjna Arbeitsplatzvorrichtung und verfahren zur nachbearbeitung eines kunststoffprodukts
PL3590687T3 (pl) * 2018-07-02 2021-11-15 Zortrax Spółka Akcyjna Urządzenie modułowe i sposób wygładzania powierzchni wyrobu z tworzywa sztucznego
EP4271129A1 (de) * 2022-04-29 2023-11-01 SMS Elotherm GmbH Vorrichtung zur induktiven erwärmung zumindest eines werkstücks sowie verfahren zur induktiven erwärmung zumindest eines werkstücks

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179306A5 (de) * 1972-04-06 1973-11-16 Inst Str Ma
US4370357A (en) * 1981-03-11 1983-01-25 Cleveland Gear Company Process of continuous metal coating
US4849598A (en) * 1987-03-30 1989-07-18 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for baking coating layer utilizing electrical induction and eddy currents
WO1992014979A1 (en) * 1991-02-26 1992-09-03 Carnaudmetalbox Plc An oven
DE4208781C1 (en) * 1992-03-17 1992-12-10 Mannesmann Ag, 4000 Duesseldorf, De Drying system for metal pipe before surface treatment e.g. polymer coating - which heats with inductive loops with a warmed airstream passing through spiral loops
US5357687A (en) * 1993-07-23 1994-10-25 Xerox Corporation Method and apparatus for drying/curing rigid cylindrical and flexible belt substrates

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179306A5 (de) * 1972-04-06 1973-11-16 Inst Str Ma
US4370357A (en) * 1981-03-11 1983-01-25 Cleveland Gear Company Process of continuous metal coating
US4849598A (en) * 1987-03-30 1989-07-18 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for baking coating layer utilizing electrical induction and eddy currents
WO1992014979A1 (en) * 1991-02-26 1992-09-03 Carnaudmetalbox Plc An oven
DE4208781C1 (en) * 1992-03-17 1992-12-10 Mannesmann Ag, 4000 Duesseldorf, De Drying system for metal pipe before surface treatment e.g. polymer coating - which heats with inductive loops with a warmed airstream passing through spiral loops
US5357687A (en) * 1993-07-23 1994-10-25 Xerox Corporation Method and apparatus for drying/curing rigid cylindrical and flexible belt substrates

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000240A1 (de) * 1996-06-29 1998-01-08 Ema Elektro-Maschinen-Schultze Gmbh & Co. Kg Vorrichtung und ein verfahren zum beschichten eines werkstücks
DE10130342C1 (de) * 2001-06-20 2003-02-06 Inductotherm Coating Equipment Verfahren und Vorrichtung zum Trocknen und/oder Einbrennen einer auf ein metallisches Band aufgebrachten Beschichtung
EP1508383A2 (de) * 2001-06-20 2005-02-23 Inductotherm Coating Equipment S.A. Verfahren und Vorrichtung zum Trocknen und/oder Einbrennen einer auf ein metallisches Band aufgebrachte Beschichtung
EP1508383A3 (de) * 2001-06-20 2006-03-29 Inductotherm Coating Equipment S.A. Verfahren und Vorrichtung zum Trocknen und/oder Einbrennen einer auf ein metallisches Band aufgebrachte Beschichtung
US9789514B2 (en) 2008-05-08 2017-10-17 Primetals Technologies France SAS Method of drying and/or curing an organic coating on a continuously running metal strip, and device for implementing this method
CN101767083B (zh) * 2009-12-25 2013-04-17 蚌埠国威滤清器有限公司 滤清器表面粉末固化设备
WO2012163334A1 (de) * 2011-05-27 2012-12-06 Thermprotec Gmbh Verfahren und anordnung zur herstellung eines beschichteten metallbandes

Also Published As

Publication number Publication date
DE69612031D1 (de) 2001-04-19
FR2734501B1 (fr) 1997-07-04
FR2734501A1 (fr) 1996-11-29
DE744222T1 (de) 1997-04-30
ATE199664T1 (de) 2001-03-15
DE69612031T2 (de) 2001-11-15
EP0744222B1 (de) 2001-03-14
US5768799A (en) 1998-06-23

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