EP0376814B1 - Deflecting device for a hot steel sheet covered with a fragile coating - Google Patents
Deflecting device for a hot steel sheet covered with a fragile coating Download PDFInfo
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 12
- 238000000576 coating method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 title 1
- 239000010959 steel Substances 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000003973 paint Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
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)
- Coating With Molten Metal (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Package Frames And Binding Bands (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Fluid-Damping Devices (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
Description
Certaines lignes de traitement d'une bande métallique comportent un poste d'enduction en continu de la bande par un revêtement du type laque, à la sortie duquel la bande passe dans un sécheur qui peut élever la température de la bande jusqu'au-delà de 220 °C. En aval de cette section de la ligne de traitement, la bande est refroidie. La longueur nécessaire au refroidissement de la bande impose à celle-ci un trajet qui comporte des boucles, donc des dispositifs de déflexion de la bande. Cette déflexion est le plus souvent assurée par un rouleau métallique d'un diamètre suffisamment important autour duquel la bande s'enroule sur 90° ou plus (voir US-A-3 576 664). Ce dispositif se répète plusieurs fois sur le trajet de la bande à l'intérieur de la ligne de traitement.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.
On a constaté qu'à la sortie du poste de sèchage, le produit se prète mal à la déflexion, du fait que le revêtement est fragile. Lors de l'enroulement de la bande autour du rouleau, le revêtement est arraché par endroits, et il se forme, également par endroits, des cloques sur la tôle revêtue.It was found that at the outlet of the drying station, the product does not lend itself well to deflection, because the coating is fragile. When the strip is wound around the roll, the covering is torn off in places, and there are also blisters on the coated sheet.
La présente invention se propose de remédier à ces défauts de fabrication par un dispositif de déflexion au contact duquel le revêtement ne se détériore pas.The present invention proposes to remedy these manufacturing defects by a deflection device in contact with which the coating does not deteriorate.
A cet effet, l'invention a pour objet un dispositif déflecteur du trajet d'une bande métallique défilant en continu dans une ligne de traitement, après un poste de la ligne où la bande est recouverte d'un revêtement fragile et à un endroit où la température de la bande est supérieure à 100°C, qui comporte, une pluralité d'organes de support de la bande, montés tournants sur un bâti, autour de leurs axes parallèles à la dimension transversale de la bande, et répartis le long d'une courbe parallèle à celle souhaitée pour la bande lors de sa déflexion, chacun des organes étant partiellement immergé dans un bac inférieur rempli de liquide.To this end, 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.
De manière préférée, chaque organe de support est un rouleau cylindrique de longueur au moins égale à la largeur de la bande métallique revêtue. Le liquide présent dans les bacs est de l'eau.Preferably, 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.
L'invention sera mieux comprise grâce à la description ci-après d'un mode de réalisation donné à titre d'exemple non limitatif.The invention will be better understood from the following description of an embodiment given by way of nonlimiting example.
Il sera fait référence au dessin annexé qui représente, par une vue schématique de côté le dispositif déflecteur de l'invention.Reference will be made to the appended drawing which represents, by a schematic side view, the deflector device of the invention.
Sur cette figure, on a représenté un bâti 1 simplement sous la forme de flasques dont un seul est visible sur la figure. Ces flasques sont portés par la structure générale de la ligne de traitement qui n'est pas représentée. Cette ligne pourra être une ligne de peinture d'une bande de tôle préalablament galvanisée, soit sur la même ligne, soit sur une ligne séparée. De manière connue, la ligne ou la section de peinture comporte en aval du poste d'enduction un poste de séchage de la peinture déposée. Ce séchage demande un apport de calories à la bande qui est réalisé, soit depuis l'extérieur de la bande, grâce à un rayonnement, soit depuis l'intérieur grâce à un chauffage par induction de la bande. L'intéret du chauffage par induction résulte du sens du gradient de température qui s'établit décroissant vers l'extérieur, ce qui permet un séchage des couches externes en dernier lieu, diminuant les risques de bullage de la peinture. Les couches externes sont, de ce fait, les moins durcies, donc sujettes à détérioration, notamment au passage sur des organes de renvoi.In this figure, there is shown 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. In known manner, 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.
Le bâti 1 supporte une pluralité de rouleaux 2, montés tournants entre les flasques, dans des paliers répartis le long d'une courbe - ici un quart de cercle - parallèle à la déflexion que l'on veut imposer à la bande métallique 3. Le nombre des rouleaux mis en oeuvre dépendra de la longueur circonférentielle le long de laquelle la déflexion de la bande sera conduite. Cette longueur dépend essentiellement de l'épaisseur de la bande. Par exemple, pour des épaisseurs de bande courantes comprises entre 0,5 millimètres et 1,5 millimètres, le quart de cercle enveloppant les rouleaux 2 sera de rayon égal à environ 650 millimètres.The frame 1 supports a plurality of
Chaque rouleau 2 est associé à un bac 4 rempli de liquide et porté par le bâti, s'étendant sous le rouleau de manière que ce dernier y soit partiellement immergé. Ainsi la bande 3, qui défile sur les rouleaux 2, les entraîne en rotation dans leurs paliers. Chaque rouleau, tournant dans le sens A, si le défilement de la bande 3 est dans le sens B, engendre la formation d'un film de liquide sur sa surface extérieure, qui vient s'interposer entre la bande, donc la surface extérieure de son revêtement, et la surface du rouleau. Ce film constitue la protection du revêtement, en supprimant le contact direct entre ce dernier et le rouleau, à condition qu'il s'établisse entre ces deux corps et qu'il s'y maintienne. On rappellera que la bande, à la sortie de la section de peinture, est à une température supérieure à 200°C, très supérieure à la température de vaporisation de l'eau. Le liquide employé sera, malgré cela, de l'eau car un autre liquide (l'huile par exemple) aurait pour inconvénient de souiller la surface peinte et imposerait un traitement de nettoyage supplémentaire. L'emploi de l'eau a été rendu possible grâce au dispositif de l'invention, dans lequel la pluralité de rouleaux 2 de petit diamètre par rapport au diamètre de la courbe suivie par la bande, permet une rotation très rapide de ceux-ci. On crée donc un refroidissement énergique du fait de la fréquence élevée de passage dans le bac de chaque portion élémentaire de surface extérieure de chaque rouleau, et un renouvellement intense du film d'eau qui s'y forme par entraînement. En outre, le petit diamètre des rouleaux par rapport à celui de la courbure de la bande, fait que le contact entre la bande et le film d'eau est limité à une surface très étroite, parallèle à une génératrice, pendant un temps très court, si bien que l'apport de calories par la bande à l'eau n'est pas suffisant pour provoquer la vaporisation complète de celle-ci qui rétablirait le contact bande-rouleau si préjudiciable au revêtement. On prendra, si besoin est, la précaution de renouveler et refroidir l'eau des bac pour en éliminer les calories provenant de la bande.Each
A titre indicatif, les rouleaux 2 ont, dans le mode de réalisation représenté, un diamètre égal au dixième de celui de la courbure de la bande, ce qui signifie que ces rouleaux ont une vitesse de rotation dix fois supérieure à celle d'un rouleau unique sur lequel, comme dans la technique connue, la bande s'enroulerait. On comprend que l'entraînement de l'eau par ces petits rouleaux soit plus intense et donc que le film créé soit plus efficace.As an indication, the
L'invention n'est pas limitée au mode de réalisation décrit, mais couvre les variantes qui ne sortent pas de son cadre, comme, en particulier, le remplacement des rouleaux par des galets entretoisés le long de l'axe qui les porte et qui est monté en rotation dans le bâti.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.
Claims (3)
- A device for deflecting a metal strip (3) running continuously through a treatment line at a location where the temperature of the strip is greater than 100°C, said location being downstream from a station in the line where the strip is covered with a fragile coating, the device being characterized in that it comprises a frame (1), a plurality of strip support members (2) rotatably mounted on the frame about axes extending parallel to the transverse dimension of the strip and distributed around a curve parallel to the desired deflection curve for the strip (3), with each of the members being partially immersed in a tank (4) beneath the member and filled with liquid.
- A device according to claim 1, characterized in that each support member (2) is a cylindrical roller whose length is not less than the width of the coated metal strip (3).
- A device according to claim 1 or claim 2, characterized in that the liquid present in the tanks (4) is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89403604T ATE88112T1 (en) | 1988-12-30 | 1989-12-21 | BUMPER FOR A WARM STEEL STRIP COVERED WITH A FRAGILE COATING. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8817515A FR2641205B1 (en) | 1988-12-30 | 1988-12-30 | DEVICE FOR DEFLECTING A STRIP OF HOT STEEL AND COVERED WITH A FRAGILE COATING |
| FR8817515 | 1988-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0376814A1 EP0376814A1 (en) | 1990-07-04 |
| EP0376814B1 true EP0376814B1 (en) | 1993-04-14 |
Family
ID=9373651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89403604A Expired - Lifetime EP0376814B1 (en) | 1988-12-30 | 1989-12-21 | Deflecting device for a hot steel sheet covered with a fragile coating |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4974540A (en) |
| EP (1) | EP0376814B1 (en) |
| JP (1) | JPH0634961B2 (en) |
| AT (1) | ATE88112T1 (en) |
| DE (1) | DE68906010T2 (en) |
| ES (1) | ES2040488T3 (en) |
| FR (1) | FR2641205B1 (en) |
Families Citing this family (3)
| 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 (en) * | 2008-10-13 | 2010-02-25 | Thyssenkrupp Steel Ag | Method for determining changes in shape of a workpiece |
Family Cites Families (8)
| 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 (en) * | 1970-07-03 | 1972-02-03 | Mannesmann Roehren Werke Ag | Method for producing an annular collar from a pipe and a device for carrying out the method |
| 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 |
-
1988
- 1988-12-30 FR FR8817515A patent/FR2641205B1/en not_active Expired - Fee Related
-
1989
- 1989-12-18 US US07/451,763 patent/US4974540A/en not_active Expired - Lifetime
- 1989-12-21 DE DE89403604T patent/DE68906010T2/en not_active Expired - Fee Related
- 1989-12-21 ES ES198989403604T patent/ES2040488T3/en not_active Expired - Lifetime
- 1989-12-21 EP EP89403604A patent/EP0376814B1/en not_active Expired - Lifetime
- 1989-12-21 AT AT89403604T patent/ATE88112T1/en not_active IP Right Cessation
- 1989-12-27 JP JP1336757A patent/JPH0634961B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2641205B1 (en) | 1992-06-19 |
| FR2641205A1 (en) | 1990-07-06 |
| US4974540A (en) | 1990-12-04 |
| DE68906010T2 (en) | 1993-10-14 |
| ATE88112T1 (en) | 1993-04-15 |
| EP0376814A1 (en) | 1990-07-04 |
| ES2040488T3 (en) | 1993-10-16 |
| JPH02229575A (en) | 1990-09-12 |
| JPH0634961B2 (en) | 1994-05-11 |
| DE68906010D1 (en) | 1993-05-19 |
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Legal Events
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