EP0542765B1 - Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbändern - Google Patents

Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbändern Download PDF

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Publication number
EP0542765B1
EP0542765B1 EP91912846A EP91912846A EP0542765B1 EP 0542765 B1 EP0542765 B1 EP 0542765B1 EP 91912846 A EP91912846 A EP 91912846A EP 91912846 A EP91912846 A EP 91912846A EP 0542765 B1 EP0542765 B1 EP 0542765B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
blowing
nozzles
metal strip
lips
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
EP91912846A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0542765A1 (de
Inventor
Heinrich Pannenbecker
Ronald Jabs
Heinrich Schmitz
Wulf Dechene
Manfred Splitt
Hans-Joachim Heiler
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl AG
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 Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT9191912846T priority Critical patent/ATE105339T1/de
Publication of EP0542765A1 publication Critical patent/EP0542765A1/de
Application granted granted Critical
Publication of EP0542765B1 publication Critical patent/EP0542765B1/de
Anticipated expiration legal-status Critical
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Classifications

    • 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 particular liquid zinc or aluminum, in the coating of metal strips with a blow-off nozzle which can be acted upon by a blow-off medium, the nozzle body of which is attached to a base body and the mutually adjustable nozzle lips of which extend in the transverse direction of the metal strip Form nozzle gap 10.
  • blow-off device is known from DE-OS 3619805.
  • the excess coating agent in particular zinc or aluminum
  • the blow-off nozzle has a nozzle gap along the width, which can be adjusted to the required blow-off conditions by adjusting the nozzle lips against each other.
  • the pressure of the blow-off medium can be adjusted in the known device in order to create the best possible blow-off conditions.
  • the invention is therefore based on the object of improving a device of the type mentioned at the outset in such a way that a blowing process which takes account of the unevenness of the strip to be coated is made possible.
  • blow-off nozzle is designed as a nozzle row, with at least two part nozzles, which can be acted upon separately with a blow-off medium, and whose respective part nozzle gaps adjoin one another to form a section-wise composed nozzle gap, are arranged in the transverse direction of the band.
  • the invention is characterized in that the blow-off nozzle is designed as a row of nozzles with individual partial nozzles, each of the partial nozzles being able to be subjected to different pressures in order to be able to adjust the pressure profile along the width of the strip to be coated in an optimized manner.
  • This allows the variety of processing options to be significantly increased. It is also conceivable, for example, to spray two or more different belts at the same time with one nozzle row, it being possible to achieve different coating conditions for the individual sub-belts.
  • the solution according to the invention is characterized in that the blow-off medium available is used more economically, since a corresponding reduction can be carried out in those places where less blow-off medium is required and only those partial nozzles have to be subjected to a correspondingly higher pressure, where necessary.
  • the individual sub-nozzles can be switched off and adjusted to the respective bandwidth.
  • each partial nozzle consists of a first nozzle half and a second nozzle half, which include a channel for the blow-off medium between them, the channel in the region of the nozzle gap being formed exclusively in the first nozzle half and being there the second half of the nozzle on the two sides perpendicular to the transverse direction of the metal strip are solid, so that in the transverse direction of the strip by interchanging the first and second half of the nozzle alternating arrangement of the partial nozzles, the respective second half of the nozzle adjacent to the adjacent first half of the nozzle with the area one of each massive sides seals.
  • This embodiment results in a particularly simple geometric structure, since the same basic constructional units can be assumed for the entire nozzle row and these only have to be lined up alternately accordingly.
  • the particular advantage is that the massive design of the second nozzle half also acts as a seal against the adjacent first nozzle halves. Therefore, additional sealing elements can be dispensed with.
  • the partial nozzles arranged in the edge region can also be pressurized separately from the others by compressed air.
  • a further pair of nozzle lips with a further adjustable continuous nozzle gap is arranged along the nozzle line. This ensures that the metal strip to be blown is exposed to a slot nozzle with an exactly linear gap, but the pressure conditions can be variably adjusted along the bandwidth. This enables the blow-off conditions to be further improved.
  • a conversion of the pressure conditions formed by the first or second half of the nozzle without any significant pressure loss into the further nozzle gap formed by the further pair of nozzle lips results if a seal is arranged by means of which the further pair of nozzle lips is sealed off from the partial nozzles.
  • the blow-off device essentially consists of a nozzle body, which is shown in the right part of FIG. 2 and which is fastened to a base body 1 by means of a fastening screw 9.
  • a compressed air connection 12 is provided, which is connected to a compressed air channel 16 and can be pressurized externally with compressed air.
  • the compressed air channel 16 extends from the compressed air connection 12 to a nozzle gap opening 10.
  • the compressed air duct 16 is enclosed by a first nozzle half 3 and a second nozzle half 4, which are connected to one another by means of clamping screws 5.
  • the compressed air channel 16 extends exclusively within the first nozzle half, while the second nozzle half 4 is solid in this area.
  • the second nozzle half 4 has a shoulder 4a in its solid area, on which a set screw 6 is supported, which lies in a thread in the first nozzle half 3.
  • the width of the nozzle gap opening 10 can be adjusted by rotating the adjusting screw 6.
  • the regions of the first nozzle half 3 and the second nozzle half 4 arranged in the region of the nozzle gap opening 10 interact in the manner of a pair of nozzle lips.
  • a further pair of nozzle lips 11 is arranged in the area outside the nozzle gap opening 10, which is sealed against the first and second nozzle halves 3 and 4 by means of a seal 15 and is fastened in the solid region of the second nozzle half 4 by means of an adjusting screw 14.
  • the further pair of nozzle lips 11 forms at its tip a further nozzle gap 13, which is also adjustable by adjusting the adjusting screw 14.
  • the arrangement of the partial nozzles shown in FIG. 2 is repeated along the width of the metal strip to be coated, which extends in the direction of the nozzle gap 10 or the further nozzle gap 13.
  • the partial nozzles shown in FIG. 2 are each different alternately offset from one another in such a way that a first nozzle half always adjoins the second nozzle half of the adjacent partial nozzle along the nozzle gap opening.
  • Sealing plates 7 for sealing the two outer partial nozzles against the ambient pressure are located in the edge region of the nozzle row designed in this way.
  • the formation of the solid area of the respective second nozzle halves 4 ensures that further sealing means are not required between the partial nozzles arranged in the central area. Rather, the solid areas of the second nozzle halves seal the adjacent first nozzle halves with the channel for the pressure medium so that each of the partial nozzles 2 can be pressurized separately at the compressed air connection 12 with a pressure medium without the pressure conditions in the respectively neighboring partial nozzles thereby changing .
  • the gap 10 shown in FIG. 3 is formed in the manner of a rectangular function, the individual rectangular sections being offset by the width of the nozzle gap 10.
  • the blow-off device By designing the blow-off device as a nozzle row with a continuous nozzle gap, the nozzle gap can be set separately in each blow-off section and the pressure of the blow-off medium can be regulated separately. For example, it is possible to work with the same or different blow-off pressure over the entire blow-off area, depending on the conditions of the coating agent.

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 Apparatus (AREA)
  • Nozzles (AREA)
  • Coating With Molten Metal (AREA)
EP91912846A 1990-07-31 1991-07-09 Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbändern Expired - Lifetime EP0542765B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191912846T ATE105339T1 (de) 1990-07-31 1991-07-09 Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbaendern.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4024229 1990-07-31
DE4024229A DE4024229C1 (es) 1990-07-31 1990-07-31
PCT/EP1991/001273 WO1992002656A1 (de) 1990-07-31 1991-07-09 Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbändern

Publications (2)

Publication Number Publication Date
EP0542765A1 EP0542765A1 (de) 1993-05-26
EP0542765B1 true EP0542765B1 (de) 1994-05-04

Family

ID=6411340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91912846A Expired - Lifetime EP0542765B1 (de) 1990-07-31 1991-07-09 Vorrichtung zum abblasen von beschichtungsmaterial bei der beschichtung von metallbändern

Country Status (7)

Country Link
US (1) US5346551A (es)
EP (1) EP0542765B1 (es)
CA (1) CA2088591C (es)
DE (2) DE4024229C1 (es)
ES (1) ES2057908T3 (es)
FI (1) FI95149C (es)
WO (1) WO1992002656A1 (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5401317A (en) * 1992-04-01 1995-03-28 Weirton Steel Corporation Coating control apparatus
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
DE4342904C1 (de) * 1993-03-02 1995-04-27 Duma Masch Anlagenbau Abblasvorrichtung
FR2721621B1 (fr) * 1994-06-22 1996-08-23 Maubeuge Fer Dispositif de soufflage d'une lame gazeuse d'essorage d'une bande sortant d'un bain de revêtement.
US5958512A (en) * 1996-12-19 1999-09-28 Avery Dennison Corporation Method and apparatus for selectively removing or displacing a fluid on a web
AUPO473297A0 (en) * 1997-01-22 1997-02-20 Industrial Automation Services Pty Ltd Coating thickness control
DE19729232C1 (de) 1997-07-09 1999-04-08 Duma Masch Anlagenbau Vorrichtung zur Vergleichmäßigung der Gasdruckverteilung über die Austrittsöffnung einer Flachstrahldüse
JP5229918B2 (ja) * 2006-06-05 2013-07-03 ポスコ ガスワイピング装置
US7563322B2 (en) * 2007-04-09 2009-07-21 West Virginia University Method and apparatus for online flow control over the span of a high aspect ratio slot jet
US8216033B2 (en) * 2008-02-22 2012-07-10 Process Air Solutions, Llc Low pressure blow-off assemblies and related methods

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2093359A5 (en) * 1970-06-11 1972-01-28 Armco Steel Corp Sensing a strip edge - using sonic sensor generating fluidic - signals which effect position - correction
DE2118253A1 (de) * 1971-04-15 1972-10-26 Demag Ag, 4100 Duisburg Verfahren und Vorrichtung zum Regeln der Luftbeaufschlagung bei Bandbeschichtungsanlagen
US3941086A (en) * 1973-08-08 1976-03-02 Italsider S.P.A. Fluid doctor blade
JPS55107767A (en) * 1979-02-14 1980-08-19 Nisshin Steel Co Ltd Controlling method for plated molten metal quantity by gas spray and gas-spraying nozzle
US4513915A (en) * 1982-12-06 1985-04-30 The Kohler Coating Machinery Corporation Nozzle construction for coating equipment
JPS62133056A (ja) * 1985-12-06 1987-06-16 Nippon Kokan Kk <Nkk> ガスワイピングノズル
DE3760425D1 (en) * 1986-06-12 1989-09-14 Duma Konstruktionsburo Blow-off device for the continuous two-sided coating of strip metal

Also Published As

Publication number Publication date
DE4024229C1 (es) 1991-07-18
FI95149B (fi) 1995-09-15
FI930410A (fi) 1993-02-17
ES2057908T3 (es) 1994-10-16
DE59101588D1 (de) 1994-06-09
US5346551A (en) 1994-09-13
FI930410A0 (fi) 1993-01-29
FI95149C (fi) 1995-12-27
WO1992002656A1 (de) 1992-02-20
CA2088591A1 (en) 1992-02-01
EP0542765A1 (de) 1993-05-26
CA2088591C (en) 1999-06-29

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