EP0249234B2 - Dispositif d'évacuation pour couvrir bilatéralement en continu un ruban à métaux - Google Patents

Dispositif d'évacuation pour couvrir bilatéralement en continu un ruban à métaux Download PDF

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Publication number
EP0249234B2
EP0249234B2 EP87108473A EP87108473A EP0249234B2 EP 0249234 B2 EP0249234 B2 EP 0249234B2 EP 87108473 A EP87108473 A EP 87108473A EP 87108473 A EP87108473 A EP 87108473A EP 0249234 B2 EP0249234 B2 EP 0249234B2
Authority
EP
European Patent Office
Prior art keywords
nozzle
blow
gap
edge
strip metal
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
EP87108473A
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German (de)
English (en)
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EP0249234A1 (fr
EP0249234B1 (fr
Inventor
Heinrich Pannenbecker
Ronald Jabs
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.)
Duma Konstruktionsbuero
Original Assignee
Duma Konstruktionsbuero
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6302879&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0249234(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Duma Konstruktionsbuero filed Critical Duma Konstruktionsbuero
Priority to AT87108473T priority Critical patent/ATE45390T1/de
Publication of EP0249234A1 publication Critical patent/EP0249234A1/fr
Application granted granted Critical
Publication of EP0249234B1 publication Critical patent/EP0249234B1/fr
Publication of EP0249234B2 publication Critical patent/EP0249234B2/fr
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    • 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

Definitions

  • the invention relates to a device for blowing off superfluous coating material in the continuous coating of metal strip on both sides, in particular when galvanizing steel strip, with a blow-off nozzle which is arranged parallel to the metal strip surface and is pressurized with compressed air, the nozzle gap of which is formed by two nozzle lips which can be dispensed with one another, the gap length of the blow-off nozzle being greater than the width of the metal strip and a cover element guided by the blow-off nozzle is provided, by means of which the compressed air supply to the nozzle gap can be covered in the region outside the gap length which is respectively adapted to the metal band width.
  • Such a device belongs to the prior art (US 3941086).
  • a blow-off nozzle is arranged on both sides of the strip which is led out of a coating agent bath.
  • the length of the blow-off nozzle must always be a safety distance greater than the bandwidth, so that reliable blow-off can also take place in the area of the strip edge.
  • slide rods are provided which serve as cover elements and are guided by the blow-off nozzle. As a result, the gap length can be adapted to the metal bandwidth.
  • edge nozzles in the edge region of the belt, which reduces air turbulence at the edges by targeted blowing on the edges. This measure is carried out to avoid noise as a result of the compressed air flowing past the strip edges, which is also associated with a deterioration in the quality of the strip coating, since the coating in the region of the strip edges becomes uneven. It is known to adjust these edge nozzles externally at the relevant points to the respective strip edge. However, manual adjustment of the edge nozzles with regard to the blowing direction and the amount of air is very complex and must always be carried out anew when the metal bandwidth changes. In addition, this results in an additional amount of compressed air during blowing, which, since the blowing takes place in the immediate vicinity of the coating agent bath, favors an increased formation of slag on the surface of the coating agent.
  • the invention has for its object to develop a device of the type mentioned in such a way that it enables improved handling.
  • the cover element is a flexible guide band which can be moved along a longitudinal groove in the region of the nozzle gap, and in that a displaceable block and an edge nozzle acting on the edge region of the metal band are arranged on the side delimiting the gap length towards the metal band edge are.
  • the structural unit of the blow-off nozzle, edge nozzle and guide belt allows both a functionally reliable manual setting of the blow-off conditions as well as the possibility of an automatic adjustment of the nozzle gap length due to a motor drive controlling the guide belt, so that the blow-off conditions can be continuously adapted to the respective belt path.
  • the blow-off nozzle 1 is arranged with its nozzle gap 2 at a certain distance from a side surface of the metal strip 33 to be coated which is guided past it.
  • the blow-off air is first introduced from an external compressed air source into the chamber a of the blow-off nozzle 1 and enters a prechamber b through a perforated wall 19. From the pre-chamber b, the compressed air passes through a filter disk 8, which consists of a porous material, in particular sintered bronze with a pore size of at least 80 ⁇ m, into the nozzle chamber c.
  • the nozzle space c is formed by nozzle lips 4 which open the nozzle gap 2 opposite one another.
  • Each of the two nozzle lips 4 is fastened to the corresponding upper or lower housing part of the blow-off nozzle 1, ie to the upper part 3 or to the base body 5, by screw connections. While the base body 5 is stationary, the upper part 3 of the blow-off nozzle is deformable, so that the nozzle gap 2 by adjusting one between the lower and the The upper part of the housing acting screw 7 is infinitely adjustable in size from the outside of the nozzle 1.
  • the amount of blow-off air flowing onto the belt can be adjusted.
  • a plurality of adjusting screws 7 are provided over the width of the blow-off nozzle, so that the profile of the compressed air distribution can be variably adjusted over the width of the metal strip 33.
  • the blow-off device e.g. can be adapted to different viscosity ratios of the coating agent in the area of the blow-off nozzle 1 by appropriate metering of the compressed air over the course of the bandwidth.
  • the entire blow-off nozzle 1 can be pivoted relative to the vertical to the tape running direction by an angle of ⁇ 20 ° with respect to a pivot point 32.
  • longitudinal grooves 12 are provided over the length of the blow-off nozzle 1, through which a guide band 11 (FIG. 2) can be moved.
  • the guide band 11 is a flexible steel band, which is guided in the area outside the blow-off nozzle in a cylindrical body 13 which is laterally attached to the blow-off nozzle 1 and is coupled to a motor drive at its end facing away from the blow-off nozzle 1.
  • the slide block 17 forms the separating surface between the area of the nozzle gap released for the compressed air outlet and the area of the nozzle gap length covered by the guide band 11 for the compressed air and prevents a transition of the compressed air from the open, band-side inner area to the hidden area.
  • the position of the guide belt 11 is adjusted so that the edge nozzles 21 are always directed towards the area of the edges of the metal belt 33 and that each of the two open inner areas covers approximately half of the metal belt width.
  • the edge blow-off air is fed to the edge nozzles 21 through a flexible steel hose 24 which is arranged on the guide belt 11. This is connected on the one hand to the area of the edge nozzle 21 and on the other hand opens into the cylindrical body 13 at the edge of the blow-off nozzle 1 and is connected there to the compressed air source 34.
  • the slide block 17 has a dirt-repellent plate 20 which is aligned with the nozzle gap 2 and engages in it.
  • the dirt-repellent plate 20 is moved over the contaminated area of the nozzle gap in a cleaning stroke for the purpose of cleaning the nozzle gap from residues of the coating agent. This cleaning stroke takes place e.g. during the changeover from one metal strip to the next.
  • the dirt-repellent plate 20 is brought by the drive 13 by means of the guide belt 11 in a rapid gear to the center of the device and back to the working position.
  • the edge nozzles 21 are acted upon by the maximum available pressure of the edge blow-off air 22.
  • Fig. 4 shows the arrangement shown according to the first embodiment in connection with the external electronic components provided for automatic operation.
  • the motor drive located in the cylindrical body 13 is controlled by a computer 16, which receives a sensor signal from the sensors 15 corresponding to the width of the metal strip 33 passed by them.
  • the effective nozzle gap length for the compressed air outlet is released by adjusting the guide band 11 and the edge nozzle 21 is positioned according to the bandwidth.
  • sensors 25 are provided, which measure the layer thickness of the metal strip 33 provided with the coating agent and also feed this measured value into the computer 16.
  • the amount of blow-off air 18 supplied to the effective nozzle gap is set on the one hand via a control valve 27 and on the other hand the edge blow-off air 22 for the edge nozzles 21 is set via a control valve 26.
  • the set amount of blow-off air enters the blow-off nozzle 1 via a tubular opening on the outer jacket of the cylindrical body 13 and is guided from there through the interior of the blow-off nozzle 1 into the compressed air space a shown in FIG. Because the filter disk 8 is arranged over the entire length of the blow-off nozzle 1 in front of the nozzle gap 2, swirling of the compressed air in the region of the nozzle gap is prevented, since the porous filter disk offers resistance to the compressed air provided, so that pressure differences along the nozzle gap are equalized .
  • the amount of edge blow-off air 22 set by the control valve 26 is supplied to the flexible hose 24 and thus to the edge nozzles 21 via a corresponding opening on the cover side of the cylindrical body 13.
  • FIG. 5 shows a second embodiment according to the invention, which differs from that The first embodiment differs only in that on the side of the base body 5 of the blow-off nozzle 1 facing the coating agent bath 31 additionally has a heat shield 29 with an intermediate layer 30 which insulates it from the base body 5.
  • FIG. 6 A third exemplary embodiment of the invention is shown in FIG. 6, which differs from the first exemplary embodiment only in that a protective plate 28 is provided in the area of the outer space around the blow-off nozzle 1 which is not covered by the metal strip 33. This avoids that dirt particles caused by the flow of compressed air are drawn from the environment into the area of the strip 33 to be coated and can thereby contaminate it. Furthermore, this mudguard 28 also serves to reduce the sound emission caused by the air flow and to transfer the heat from the coating agent bath 31 to the blow-off nozzle 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Coating Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (11)

1. Dispositif pour faire disparaître en soufflant la matière de placage superflue lors du placage bilatéral en continu d'un feuillard métallique, en particulier lors de la galvanisation d'un feuillard d'acier, avec une buse d'évacuation par soufflage (1) disposée parallèle à la surface du feuillard métallique (33), actionnée à l'air comprimé, dont la fente de buse (2) est formée par deux lèvres de buse (4) mobiles l'une par rapport l'autre, la longueur de fente de la buse d'évacuation par soufflage (1) étant plus grande que la largeurdu feuillard métallique, et etant prévu un element de recouvrement (11) guide par la buse d'évacuation par soufflage (1), par lequel l'amenée d'air à la fente de buse (2) peut être recouverte dans la région à l'extérieur de la longueur de fente ajustée respectivement à la largeur du feuillard mêtalli- que, caractérisé par le fait que l'élément de recouvrement est une bande de guidage (11) flexible, qui peut être déplacée le long d'une rainure longitudinale (12) dans la région de la fente de buse, et qu'un bloc coulissant (17) et une buse d'arête (21) agissant surla région d'arête du feuillard métallique sont disposés sur la face de celle-ci limitant la longueur de fente en direction de l'arête du feuillard métallique.
2. Dispositif selon la revendication 1,
caractérisé par le fait que la bande de guidage (11) peut être déplacée par un entraînement motorisé agissant comme moteur de déplacement pour le réglage automatique de la longueur de fente, qui est relié à la sortie d'un calculateur (16) dont le signal d'entrée est formé par des capteurs de mesure (15) mesurant la largeur du feuillard métallique.
3. Dispositif selon la revendication 1 ou 2,
caractérisé par le fait que le bloc coulissant (17) logé dans la région du point de liaison entre la bande de guidage (11) et la buse d'arête (21) présente une tôle déflectrice de saleté (20) alignée avec la fente de buse (2) et en prise dans celle-ci, pour le nettoyage de la fente de buse (2) de restes de matière de placage.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait qu'un tuyau métallique flexible (24) est disposé sur la bande de guidage (11), par lequel se produit l'amenée d'air comprimé aux buses d'arête (21).
5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que la largeur de la fente de buse (2) déterminée par l'écartement des lèvres de buse (4) peut être réglée en continu par une vis de réglage (7) accessible depuis l'extérieur du dispositif.
6. Dispositif selon la revendiaction 5,
caractérisé par le fait que plusieurs vis de réglage (7) sont prévues le long de la longueur de la fente de buse, par lesquelles le profil d'intensité du soufflage d'air comprimé d'évacuation peut être modifié.
7. Dispositif selon l'une des revendication 1 à 6, caractérisé par le fait qu'une régulation de l'air comprimé est prévue de teille manière que par l'intermédiaire de valves de réglage (26) pour l'air d'évacuation par soufflage d'arête ou de valves de réglage (27) pour l'air de buse d'évacuation par soufflage reliées à la sortie du calculateur (16), les portions quantitatives d'air comprimé envoyées aux buses d'arête (21) ou aux buses d'évacuation par soufflage (1) peuvent être modifiées par les signaux des capteurs (25) mesurant l'épaisseur de couche du feuillard métallique qui sont encoyés au calculateur (16).
8. Dispositif selon l'une des revendications précédentes, caractérisé par le fait qu'une pièce de filtration (8) en matériaux poreux est prévue dan tout la région de la longueur de la buse d'évacuation par soufflage (1) entre la fente de buse (2) et la vis de réglage (7).
9. Dispositif selon la revendiaction 8,
caractérisé par le fait que la pièce de filtration (8) est formée de bronze fritté avec une dimension de pores d'au moins 80 f..lm.
10. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que la buse d'évacuation par soufflage (1) est entourée par une tôle de protection (28) couvrant la buse dans la région de l'espace extérieur non recouverte par la bande métallique.
11. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les parties de la buse d'évacuation par soufflage (1) tournées vers le bain de matière de placage (31) sont revêtues par un bouclier thermique (29,30).
EP87108473A 1986-06-12 1987-06-11 Dispositif d'évacuation pour couvrir bilatéralement en continu un ruban à métaux Expired - Lifetime EP0249234B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108473T ATE45390T1 (de) 1986-06-12 1987-06-11 Abblasvorrichtung zum kontinuierlichen beidseitigen beschichten von metallband.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3619805 1986-06-12
DE3619805 1986-06-12

Publications (3)

Publication Number Publication Date
EP0249234A1 EP0249234A1 (fr) 1987-12-16
EP0249234B1 EP0249234B1 (fr) 1989-08-09
EP0249234B2 true EP0249234B2 (fr) 1994-08-17

Family

ID=6302879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108473A Expired - Lifetime EP0249234B2 (fr) 1986-06-12 1987-06-11 Dispositif d'évacuation pour couvrir bilatéralement en continu un ruban à métaux

Country Status (4)

Country Link
EP (1) EP0249234B2 (fr)
AT (1) ATE45390T1 (fr)
DE (1) DE3760425D1 (fr)
ES (1) ES2009820T5 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3704199A1 (de) * 1987-02-11 1988-08-25 Unitas Sa Duese zum abblasen kontinuierlich bewegter oberflaechen
DE4024229C1 (fr) * 1990-07-31 1991-07-18 Heinrich 4100 Duisburg De Pannenbecker
DE4208558C1 (en) * 1992-03-18 1993-03-11 Duma Konstruktionsbuero, 4100 Duisburg, De Removing excess coating material from steel strip - with compressed air from nozzle having gap formed by nozzle lips partly coverable by guide strip and using deflecting element for lateral deflection of air jet
DE4306394C1 (de) * 1993-03-02 1994-04-21 Duma Masch Anlagenbau Abblasvorrichtung und Verfahren zum Abblasen von überflüssigem Beschichtungsmaterial
DE4223343C1 (de) * 1992-07-16 1994-03-17 Duma Masch Anlagenbau Abblasvorrichtung
DE4300868C1 (de) * 1993-01-15 1994-03-17 Duma Masch Anlagenbau Beschichtungsvorrichtung
AUPO473297A0 (en) * 1997-01-22 1997-02-20 Industrial Automation Services Pty Ltd Coating thickness control
DE102006046797A1 (de) * 2006-09-29 2008-04-03 Josef Schiele Ohg Verfahren und Vorrichtung zur Bandbeschichtung von variablen Werkstücken in einer Vakuumbeschichtungsvorrichtung
EP2140944A1 (fr) * 2008-07-03 2010-01-06 Linde AG Déflecteurs réglables pour essuyage au gaz
EP2631012B1 (fr) 2012-02-21 2014-10-29 Cockerill Maintenance & Ingenierie S.A. Système permettant de réduire la consommation de gaz de nettoyage dans une lame d'air
JP6220201B2 (ja) * 2013-09-19 2017-10-25 真人 稗田 めっき膜厚調整装置
CN110158013A (zh) * 2019-06-22 2019-08-23 徐州华正铸业有限公司 一种喷锌机的喷锌枪调节装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162989B1 (fr) * 1984-05-30 1988-03-16 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Procédé et dispositif perfectionnés pour la fabrication de tôle ou bande d'acier galvanisé exempte de revêtement de zinc pur sur au moins une face

Also Published As

Publication number Publication date
DE3760425D1 (en) 1989-09-14
ATE45390T1 (de) 1989-08-15
EP0249234A1 (fr) 1987-12-16
ES2009820B3 (es) 1989-10-16
ES2009820T5 (es) 1995-08-16
EP0249234B1 (fr) 1989-08-09

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