EP0376814B1 - Prallwand für ein warmes Stahlband, das mit einer zerbrechlichen Beschichtung bedeckt ist - Google Patents

Prallwand für ein warmes Stahlband, das mit einer zerbrechlichen Beschichtung bedeckt ist Download PDF

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Publication number
EP0376814B1
EP0376814B1 EP89403604A EP89403604A EP0376814B1 EP 0376814 B1 EP0376814 B1 EP 0376814B1 EP 89403604 A EP89403604 A EP 89403604A EP 89403604 A EP89403604 A EP 89403604A EP 0376814 B1 EP0376814 B1 EP 0376814B1
Authority
EP
European Patent Office
Prior art keywords
strip
frame
line
location
coating
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.)
Expired - Lifetime
Application number
EP89403604A
Other languages
English (en)
French (fr)
Other versions
EP0376814A1 (de
Inventor
Stéphane Loslever
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
Priority to AT89403604T priority Critical patent/ATE88112T1/de
Publication of EP0376814A1 publication Critical patent/EP0376814A1/de
Application granted granted Critical
Publication of EP0376814B1 publication Critical patent/EP0376814B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling

Definitions

  • Certain processing lines for a metal strip include a station for continuously coating the strip with a lacquer-type coating, at the outlet of which the strip passes through a dryer which can raise the temperature of the strip to beyond 220 ° C. Downstream of this section of the processing line, the strip is cooled.
  • the length necessary for the cooling of the strip imposes on the latter a path which includes loops, therefore devices for deflecting the strip. This deflection is most often provided by a metal roller of a sufficiently large diameter around which the strip is wound over 90 ° or more (see US-A-3,576,664). This device repeats several times on the path of the strip inside the processing line.
  • the present invention proposes to remedy these manufacturing defects by a deflection device in contact with which the coating does not deteriorate.
  • the subject of the invention is a device for deflecting the path of a metal strip traveling continuously in a treatment line, after a station on the line where the strip is covered with a fragile coating and at a place where the temperature of the strip is greater than 100 ° C., which comprises a plurality of strip support members, mounted for rotation on a frame, around their axes parallel to the transverse dimension of the strip, and distributed along 'a curve parallel to that desired for the strip during its deflection, each of the members being partially immersed in a lower tank filled with liquid.
  • each support member is a cylindrical roller of length at least equal to the width of the coated metal strip.
  • the liquid present in the tanks is water.
  • a frame 1 simply in the form of flanges of which only one is visible in the figure. These flanges are carried by the general structure of the processing line which is not shown.
  • This line may be a paint line of a previously galvanized sheet metal strip, either on the same line, or on a separate line.
  • the paint line or section comprises downstream of the coating station a station for drying the deposited paint. This drying requires a supply of calories to the strip which is carried out either from the outside of the strip, thanks to radiation, or from the inside thanks to an induction heating of the strip.
  • the advantage of induction heating results from the direction of the temperature gradient which decreases towards the outside, which allows drying of the external layers lastly, reducing the risk of paint bubbling.
  • the outer layers are, therefore, the least hardened, therefore subject to deterioration, in particular when passing over return members.
  • the frame 1 supports a plurality of rollers 2, mounted to rotate between the flanges, in bearings distributed along a curve - here a quarter of a circle - parallel to the deflection which it is desired to impose on the metal strip 3.
  • the number of rollers used will depend on the circumferential length along which the deflection of the strip is conducted. This length essentially depends on the thickness of the strip. For example, for common strip thicknesses between 0.5 millimeters and 1.5 millimeters, the quarter circle surrounding the rollers 2 will have a radius equal to approximately 650 millimeters.
  • Each roller 2 is associated with a tank 4 filled with liquid and carried by the frame, extending under the roller so that the latter is partially submerged therein.
  • the strip 3 which runs on the rollers 2, drives them in rotation in their bearings.
  • Each roller turning in direction A, if the movement of the strip 3 is in direction B, generates the formation of a film of liquid on its outer surface, which comes to be interposed between the strip, therefore the outer surface of its coating, and the surface of the roller.
  • This film constitutes the protection of the coating, by eliminating direct contact between the latter and the roller, provided that it is established between these two bodies and that it remains there.
  • the strip at the outlet of the paint section, is at a temperature above 200 ° C., much higher than the vaporization temperature of the water.
  • the liquid used will, in spite of this, be water because another liquid (oil for example) would have the disadvantage of contaminating the painted surface and would require an additional cleaning treatment.
  • the use of water has been made possible thanks to the device of the invention, in which the plurality of rollers 2 of small diameter relative to the diameter of the curve followed by the strip, allows a very rapid rotation thereof. . We therefore creates an energetic cooling due to the high frequency of passage through the tank of each elementary portion of the outer surface of each roller, and an intense renewal of the film of water which is formed there by entrainment.
  • the small diameter of the rollers in relation to that of the curvature of the strip means that contact between the strip and the film of water is limited to a very narrow surface, parallel to a generator, for a very short time. , so that the supply of calories by the strip to the water is not sufficient to cause complete vaporization of the latter which would restore the strip-roll contact if detrimental to the coating. If necessary, we will take the precaution of renewing and cooling the water in the tanks to eliminate the calories from the strip.
  • the rollers 2 have, in the embodiment shown, a diameter equal to one tenth of that of the curvature of the strip, which means that these rollers have a rotational speed ten times greater than that of a roller single on which, as in the known technique, the strip would be wound. It is understood that the entrainment of water by these small rollers is more intense and therefore that the film created is more effective.
  • the invention is not limited to the embodiment described, but covers variants which do not depart from its scope, such as, in particular, the replacement of the rollers by rollers braced along the axis which carries them and which is rotatably mounted in the frame.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Fluid-Damping Devices (AREA)
  • Package Frames And Binding Bands (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Claims (3)

  1. Ablenkvorrichtung für die Bahn eines kontinuier- lich durch eine Bearbeitungsstraße laufenden Metallbandes (3) nach einer Station der Straße, wo das Band mit einer zerbrechlichen Beschichtung bedeckt wird, und an einer Stelle, wo die Temperatur des Bandes mehr als 100° C beträgt, dadurch gekennzeichnet, daß sie auf einem Gestell (1) eine Mehrzahl von Stützorganen (2) für das Band (3) umfaßt, die an dem Gestell um zur Querrichtung des Bandes parallele Achsen drehbar gelagert und entlang eines Bogens verteilt angeordnet sind, der zu der gewünschten Krümmung des Bandes bei der Ablenkung desselben parallel ist, wobei jedes der Organe teilweise in einen unteren mit Flüssigkeit gefüllten Behälter eintaucht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedes Stützorgan (2) eine zylindrische Rolle ist, deren Länge mindestens gleich der Breite des beschichteten Metallbandes (3) ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Flüssigkeit in den Behältern (4) Wasser ist.
EP89403604A 1988-12-30 1989-12-21 Prallwand für ein warmes Stahlband, das mit einer zerbrechlichen Beschichtung bedeckt ist Expired - Lifetime EP0376814B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89403604T ATE88112T1 (de) 1988-12-30 1989-12-21 Prallwand fuer ein warmes stahlband, das mit einer zerbrechlichen beschichtung bedeckt ist.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8817515A FR2641205B1 (fr) 1988-12-30 1988-12-30 Dispositif deflecteur d'une bande d'acier chaude et recouverte d'un revetement fragile
FR8817515 1988-12-30

Publications (2)

Publication Number Publication Date
EP0376814A1 EP0376814A1 (de) 1990-07-04
EP0376814B1 true EP0376814B1 (de) 1993-04-14

Family

ID=9373651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89403604A Expired - Lifetime EP0376814B1 (de) 1988-12-30 1989-12-21 Prallwand für ein warmes Stahlband, das mit einer zerbrechlichen Beschichtung bedeckt ist

Country Status (7)

Country Link
US (1) US4974540A (de)
EP (1) EP0376814B1 (de)
JP (1) JPH0634961B2 (de)
AT (1) ATE88112T1 (de)
DE (1) DE68906010T2 (de)
ES (1) ES2040488T3 (de)
FR (1) FR2641205B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6344100B1 (en) * 1999-09-29 2002-02-05 Robert A. Hipskind Method of resurfacing a roll
US20070209317A1 (en) * 2006-03-10 2007-09-13 Jensen Gary L Thermal transfer barrier building members
DE102008037442B3 (de) * 2008-10-13 2010-02-25 Thyssenkrupp Steel Ag Verfahren zur Bestimmung von Formänderungen eines Werkstücks

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573097A (en) * 1951-10-30 Epstein
US2833672A (en) * 1955-05-17 1958-05-06 United States Steel Corp Method and apparatus for continuously applying a protective film of lacquer to steelstrip
US3072172A (en) * 1959-05-04 1963-01-08 American Pipe & Constr Co Method and apparatus for positioning edge portions in butt-welding helical seam tubing
US3093052A (en) * 1959-12-03 1963-06-11 Willard C Burner Photographic processing apparatus
US3576664A (en) * 1968-09-10 1971-04-27 Cornwells Metal Finishing Co I Method for coating metal strips
DE2032937A1 (de) * 1970-07-03 1972-02-03 Mannesmann Roehren Werke Ag Verfahren zum Herstellen eines Ringbundes aus einem Rohr sowie eine Vorrichtung zum Ausüben des Verfahrens
US3681121A (en) * 1970-08-21 1972-08-01 Afco Products Inc Coating process
US3703156A (en) * 1971-04-28 1972-11-21 Dick Co Ab Apparatus for applying a conversion liquid to electrostatic copy material

Also Published As

Publication number Publication date
FR2641205A1 (fr) 1990-07-06
FR2641205B1 (fr) 1992-06-19
DE68906010T2 (de) 1993-10-14
JPH02229575A (ja) 1990-09-12
ES2040488T3 (es) 1993-10-16
DE68906010D1 (de) 1993-05-19
JPH0634961B2 (ja) 1994-05-11
EP0376814A1 (de) 1990-07-04
ATE88112T1 (de) 1993-04-15
US4974540A (en) 1990-12-04

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