EP0249234A1 - 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
EP0249234A1
EP0249234A1 EP87108473A EP87108473A EP0249234A1 EP 0249234 A1 EP0249234 A1 EP 0249234A1 EP 87108473 A EP87108473 A EP 87108473A EP 87108473 A EP87108473 A EP 87108473A EP 0249234 A1 EP0249234 A1 EP 0249234A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
blow
gap
metal strip
edge
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
EP87108473A
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German (de)
English (en)
Other versions
EP0249234B1 (fr
EP0249234B2 (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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Filing date
Publication date
Family has litigation
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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
Publication of EP0249234B1 publication Critical patent/EP0249234B1/fr
Application granted granted Critical
Publication of EP0249234B2 publication Critical patent/EP0249234B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 during 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 has a compressed-air blow-off nozzle, the nozzle gap of which is formed by two mutually adjustable nozzle lips, the gap length of the blow-off nozzle being greater than the width of the metal band.
  • a blow-off nozzle is arranged on both sides of the strip that 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 blowing off can also take place in the area of the strip edge.
  • the compressed air jets of the two blow-off nozzles directly opposite each other in the area outside the strip edges cause air swirling to occur.
  • the air turbulence also leads to a deterioration in the quality of the strip coating, since this becomes uneven in the area of the strip edges, ie so-called "growths" occur at the strip edges.
  • edge nozzles are used in the edge region of the belt, which reduce the air turbulence mentioned at the edges by targeted blowing on the latter. It is known to adjust these edge nozzles externally at the relevant points to the respective strip edge.
  • 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.
  • 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 object of the invention is therefore to create a device of the type mentioned at the outset which enables economical use of compressed air which is optimized for the respective metal strip conditions and improved handling of the device.
  • This object is achieved in that 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 strip width.
  • the solution according to the invention is characterized in that the effective nozzle gap length is in each case set to the suitable value which is predetermined by the product. Due to the optimally metered supply of compressed air, edge growth of the coating material on the metal strip edges due to inhomogeneous air flow conditions is effectively avoided. Because the cover element is guided by the blow-off nozzle, it forms a compact unit with it, which makes the handling of the device much easier. By covering the amount of air gap that is not required for the respective application, compressed air is saved on the one hand and therefore less compressed air escapes into the outside area in the area of the coating agent bath, thereby reducing the tendency to form slag.
  • the device is particularly advantageous because in the edge region of the metal strip there is no direct, mutual flow of the compressed air from the two blow-off nozzles respectively assigned to the strip sides. This effectively suppresses flow noise at the belt edges.
  • 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 and the possibility of an automatic adjustment of the nozzle gap length as a result of a motor drive controlling the guide belt, so that the blow-off conditions can be constantly 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 into the chamber a of the blow-off nozzle 1 from an external compressed air source and passes through one Perforated wall 19 in a prechamber b. 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 size of the nozzle gap 2 can be adjusted continuously from the outer region of the nozzle 1 by adjusting an adjusting screw 7 acting between the lower and the upper part of the housing.
  • 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. This allows the blow-off device e.g. to be adapted over the course of the bandwidth to different viscosity ratios of the coating agent in the area of the blow-off nozzle 1 by appropriate metering of the compressed air.
  • the entire blow-off nozzle 1 can be swiveled by an angle of ⁇ 20 ° with respect to the vertical to the tape running direction 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 leader 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 attached laterally to the blow-off nozzle 1 and is coupled to a motor drive at its end remote 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 the compressed air from passing from the open, band-side inner area into 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 supplied to the edge nozzles 21 through a flexible steel hose 24 which is arranged around 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 that is aligned with the nozzle gap 2 and engages in it.
  • the dirt-repellent plate 20 is moved for the purpose of cleaning the nozzle gap from residues of the coating agent in a cleaning stroke over the contaminated area of the nozzle gap. 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 into the working position.
  • the maximum available pressure of the edge blow-off air 22 is applied to the edge nozzles 21.
  • 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.
  • a computer 16 which receives a sensor signal from the sensors 15 corresponding to the width of the metal strip 33 passed by them.
  • 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 2 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. 1. 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 fed 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 exemplary embodiment according to the invention, which differs from the first exemplary embodiment only in that, on the side of the base body 5 of the blow-off nozzle 1 facing the coating agent bath 31, an additional heat protection plate 29 with an intermediate layer insulating it from the base body 5 30 has.
  • 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 from the environment in the area caused by the flow of compressed air of the tape 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.

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  • 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)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
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 true EP0249234A1 (fr) 1987-12-16
EP0249234B1 EP0249234B1 (fr) 1989-08-09
EP0249234B2 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)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278373A2 (fr) * 1987-02-11 1988-08-17 Unitas S.A. Lance pour balayer de façon continue des surfaces en mouvement
WO1992002656A1 (fr) * 1990-07-31 1992-02-20 Thyssen Stahl Ag Dispositif d'elimination par air souffle de materiaux de revetement lors du revetement de bandes metalliques
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
DE4300868C1 (de) * 1993-01-15 1994-03-17 Duma Masch Anlagenbau Beschichtungsvorrichtung
DE4223343C1 (de) * 1992-07-16 1994-03-17 Duma Masch Anlagenbau Abblasvorrichtung
DE4306394C1 (de) * 1993-03-02 1994-04-21 Duma Masch Anlagenbau Abblasvorrichtung und Verfahren zum Abblasen von überflüssigem Beschichtungsmaterial
WO1998032890A1 (fr) * 1997-01-22 1998-07-30 Industrial Automation Services Pty. Ltd. Ajustement de l'epaisseur d'un revetement
EP2140944A1 (fr) * 2008-07-03 2010-01-06 Linde AG Déflecteurs réglables pour essuyage au gaz
EP2631012A1 (fr) 2012-02-21 2013-08-28 Cockerill Maintenance & Ingenierie S.A. Système permettant de réduire la consommation de gaz de nettoyage dans une lame d'air
JP2015059245A (ja) * 2013-09-19 2015-03-30 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006046797A1 (de) * 2006-09-29 2008-04-03 Josef Schiele Ohg Verfahren und Vorrichtung zur Bandbeschichtung von variablen Werkstücken in einer Vakuumbeschichtungsvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162989A1 (fr) * 1984-05-30 1985-12-04 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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162989A1 (fr) * 1984-05-30 1985-12-04 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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, C Field, Vol. 9, No. 222, 9. September 1985 THE PATENT OFFICE JAPANESE GOVERNMENT Seite 29 C 302 * JP - A - 60-82 652 ( NITSHUSHIN SEIKOU K.K. ) * *
PATENT ABSTRACTS OF JAPAN, unexamined applications, C Field, Vol. 9, No. 301, 28. November 1985 THE PATENT OFFICE JAPANESE GOVERNMENT Seite 27 C 316 * JP - A - 60-138 062 ( KAWASAKI SEITETSU K.K. ) * *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278373A2 (fr) * 1987-02-11 1988-08-17 Unitas S.A. Lance pour balayer de façon continue des surfaces en mouvement
EP0278373A3 (en) * 1987-02-11 1989-03-15 Unitas S.A. Gas-wiping nozzle for continuously moving surfaces
WO1992002656A1 (fr) * 1990-07-31 1992-02-20 Thyssen Stahl Ag Dispositif d'elimination par air souffle de materiaux de revetement lors du revetement de bandes metalliques
US5346551A (en) * 1990-07-31 1994-09-13 Thyssen Stahl Ag Device for blowing off coating material in the coating of metal bands
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
DE4223343C1 (de) * 1992-07-16 1994-03-17 Duma Masch Anlagenbau Abblasvorrichtung
DE4300868C1 (de) * 1993-01-15 1994-03-17 Duma Masch Anlagenbau Beschichtungsvorrichtung
DE4306394C1 (de) * 1993-03-02 1994-04-21 Duma Masch Anlagenbau Abblasvorrichtung und Verfahren zum Abblasen von überflüssigem Beschichtungsmaterial
WO1998032890A1 (fr) * 1997-01-22 1998-07-30 Industrial Automation Services Pty. Ltd. Ajustement de l'epaisseur d'un revetement
GB2336377A (en) * 1997-01-22 1999-10-20 Ind Automation Serv Pty Ltd Coating thickness control
US6199301B1 (en) 1997-01-22 2001-03-13 Industrial Automation Services Pty. Ltd. Coating thickness control
GB2336377B (en) * 1997-01-22 2001-07-25 Ind Automation Serv Pty Ltd Coating thickness control
EP2140944A1 (fr) * 2008-07-03 2010-01-06 Linde AG Déflecteurs réglables pour essuyage au gaz
EP2631012A1 (fr) 2012-02-21 2013-08-28 Cockerill Maintenance & Ingenierie S.A. Système permettant de réduire la consommation de gaz de nettoyage dans une lame d'air
WO2013124196A1 (fr) 2012-02-21 2013-08-29 Cockerill Maintenance & Ingenierie S.A. Système de réduction de la consommation de gaz d'essuyage dans une lame d'air
US9217194B2 (en) 2012-02-21 2015-12-22 Cockerill Maintenance & Ingénierie S.A. System for reducing the wiping gas consumption in an air knife
RU2615392C2 (ru) * 2012-02-21 2017-04-04 Кокрий Ментенанс Эт Энженьери С.А. Система для уменьшения потребления отжимающего газа в воздушном ноже
JP2015059245A (ja) * 2013-09-19 2015-03-30 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

Also Published As

Publication number Publication date
EP0249234B1 (fr) 1989-08-09
ATE45390T1 (de) 1989-08-15
DE3760425D1 (en) 1989-09-14
ES2009820T5 (es) 1995-08-16
ES2009820B3 (es) 1989-10-16
EP0249234B2 (fr) 1994-08-17

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