EP1027471B1 - Vorrrichtung zum herstellen eines rakelstabes verwendbar in der papierindustrie - Google Patents

Vorrrichtung zum herstellen eines rakelstabes verwendbar in der papierindustrie Download PDF

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Publication number
EP1027471B1
EP1027471B1 EP98952800A EP98952800A EP1027471B1 EP 1027471 B1 EP1027471 B1 EP 1027471B1 EP 98952800 A EP98952800 A EP 98952800A EP 98952800 A EP98952800 A EP 98952800A EP 1027471 B1 EP1027471 B1 EP 1027471B1
Authority
EP
European Patent Office
Prior art keywords
bar
coating
constituted
sleeping
rod
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
EP98952800A
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English (en)
French (fr)
Other versions
EP1027471A1 (de
Inventor
Peter Brodbeck
Christian Coddet
Bernard Hansz
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.)
BTG Eclepens SA
Original Assignee
BTG Eclepens SA
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 BTG Eclepens SA filed Critical BTG Eclepens SA
Publication of EP1027471A1 publication Critical patent/EP1027471A1/de
Application granted granted Critical
Publication of EP1027471B1 publication Critical patent/EP1027471B1/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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0442—Installation or apparatus for applying liquid or other fluent material to separate articles rotated during spraying operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/32—Shielding elements, i.e. elements preventing overspray from reaching areas other than the object to be sprayed
    • B05B12/36—Side shields, i.e. shields extending in a direction substantially parallel to the spray jet
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/22—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc
    • B05B7/222—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc
    • B05B7/226—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc the material being originally a particulate material

Definitions

  • a coating material is deposited on the paper backing in order to give the paper certain properties such as that the surface is smooth and resistant.
  • One of the organs is made up of composite blades forming contact scraper for spreading the coating material in relative motion relative to said blade.
  • Another organ consists of rods or coating material transfer bars on the paper support, said rods or bars being commonly called rod (s) in the sector technique considered.
  • the coating bars may have a surface appearance smooth or grooved.
  • the sleeping bars When the sleeping bars are smooth, they serve to wring out the coating material when it is on the transfer cylinder before said coating material is transferred to the paper medium.
  • the sleeping bars When the sleeping bars are fluted, they constitute a means of metering and transferring the coating material onto the paper, due to the fact that the coating bars pass through a container of coating material to fill the grooves with said coating material before transferring it to the support paper passing over a cylinder.
  • a first problem to be solved concerns the surface condition which should be such that the transfer of the coating material to the paper should be do this in a controlled and consistent manner, regardless of the type of sleeping bar, smooth or grooved.
  • a second problem concerns the manufacture of the bar sleeping. Indeed, the current trend is to use sleeping bars of larger and larger, the length being able to reach 10 meters and more.
  • a third problem concerns the production of the coating on the sleeping bar.
  • the coating is carried out by thermal spraying, it is necessary to train the sleeping bar in rotation during all the deposit operation.
  • vibration of the sleeping bar which causes for example a rebound particles which is all the more important as the vibration is high.
  • a consequences of such a rebound of the particles projected onto the bar coating is the formation of a non-uniform coating over the entire length of the sleeping bar.
  • a first solution recommended by the present invention is to hold the sleeping bar at both ends on a frame and center it relative to the jaws of said frame.
  • the sleeping bar has a great length, there may be a sag in the center of the bar sleeping.
  • known techniques which consist in using shims regularly positioned along the length of the sleeping bar, the shims generally being constituted by rollers which are constantly pushed by jacks. But this is not satisfactory. Indeed, the knobs, by their application on the sleeping bar, produce marks or imprints on said bar, such imprints creating surface defects during the deposition of the coating.
  • rollers More we use setting wheels and the more there are fingerprints on the bar sleeping, the rollers being separated from each other by a distance about a meter. It should also be noted that there may be a transfer of material between the rollers and the coating bar by friction and wear of said bar or said knobs during the entire operation of depositing the coating.
  • the object of the present invention is to remedy the drawbacks aforementioned and to propose a new sleeping bar as well as a new manufacturing process and a device for implementing the method of manufacturing the coating bar.
  • An object of the present invention is a manufacturing process a sleeping bar, of the type consisting in holding the two ends of said bar on end supports of a frame, one of the ends being kept fixed, and to rotate said bar and which is characterized in that it further consists in tensioning said bar during the projection of a coating on said bar, the stretching of said bar corresponding to an elongation of approximately 0.2 to 0.001% in static.
  • the bar coating which is coated is kept straight during projection of said coating.
  • the bar coating is made of ferromagnetic material and, more particularly, a chrome steel.
  • the device for implementing of the method for manufacturing the coating bar is of the type comprising a frame on which said sleeping bar is mounted, at least one motor variable and adjustable rotation of said bar coating, means for thermal projection of a coating, characterized in that it further comprises means for pulling a end of said bar, the other end being held stationary, said traction being effected during the rotation of said coating bar and during the thermal spraying of said coating.
  • the simultaneous adjustment of rotation and traction allows stabilization of the bar.
  • the device comprises means for centering and holding at least part of the sleeping bar, said means being, for example, constituted by a bearing which can be magnetic, fluid or mechanical.
  • An advantage of the present invention lies in the fact that obtains a perfectly stable and uniform sleeping bar which allows efficient drying of the coating material before it is transferred to the paper backing when it is smooth. In the case of grooved bars, the dosage is best performed due to the nature of the coating.
  • the sleeping bar has a duration of much larger life which reduces the number of changes and therefore a considerable reduction in the cost of papermaking layer.
  • the method of manufacturing a coating bar 1 consists in mount said bar at its two ends, one end, for example the end 2, being kept fixed on a support 3, while the other end 4 is mounted on a mobile support 5.
  • the mobile support 5 is moved so as to stretch said sleeping bar 1, with force necessary for the desired elongation, during the thermal projection of a coating and during the rotation of said coating bar 1.
  • the rotation of the sleeping bar 1 is ensured by a speed motor variable 6.
  • the traction carried out on the end 4, by means such as those to be described later, is such that the elongation of said sleeping bar corresponds to an elongation between 0.2 and 0.001%.
  • the bar In order to considerably reduce the vibrations of said bar 1 during rotation, the bar is kept straight in the area where the thermal spraying of the coating is carried out, so that achieve a uniform coating in said area.
  • the sleeping bar 1 is perfectly centered during projection thermal coating in addition to keeping it straight, we get a perfectly homogeneous sleeping bar over its entire length and whatever the latter.
  • it is possible to manufacture sleeping bars having a length greater than 10 m for example and provided with a coating of constant thickness and without any mark.
  • compression occurs covering, in the direction opposite to the direction of traction. This compression of the coating increases its hardness and greatly reduces the risk of cracking.
  • the device comprises a rigid frame 10 on which are mounted a variable speed motor 6 for rotating the bar sleeping 1, two end supports 3 and 5 in which are arranged the ends 2 and 4 of said bar 1.
  • the device comprises means of thermal spraying 11 of a powder which, after spraying onto the bar 1, constitutes the coating.
  • the thermal projection means 11 are constituted for example by a plasma torch 12 which is mounted on a carriage 13 which is driven in translation on the frame 10, using a motor not shown, the displacement means being able, for example, be constituted by a transmission belt.
  • Support 3 receives the end 2 of the rod 1 and keeps said end 2 fixed.
  • the means to tighten and immobilize the end 2 can be constituted by bits, known per se.
  • the other end 4 of the bar 1 is mounted in the support 5 which is integral with a beam 14 mounted transversely on the frame 10 and which in turn is integral with two rods 15 of two jacks 16.
  • the cylinders 16 are supplied with hydraulic and / or pneumatic energy from in a manner known per se and pull the bar 1, so that this last one is stretched, to the right in Figure 4, and produce a traction corresponding to a lengthening of the bar of approximately 0.2 to 0.001%.
  • the device also includes means for holding and centering of bar 1, so as to maintain said straight bar or horizontal or substantially horizontal during the various phases of thermal projection of the coating, that is to say, at the various positions of the plasma torch 12 along said bar 1.
  • these means of holding and centering can be constituted by a magnetic bearing 17 which is crossed by the bar 1 and which creates a magnetic field sufficient to prevent vibration and bending of the bar 1.
  • the magnetic bearing 17, the structure of which is well known to specialists, is moved along with the plasma torch 12 so that in each projection area materialized by a rectangle 18 in FIG. 1, bar 1 is maintained and centered.
  • Other devices such as fluid bearings or mechanical bearings can be used with success.
  • the plasma torch 12 comprises a powder injector 19 which is supplied with powder from a source not shown.
  • the flame 20 projects the powder onto the substrate to be coated, constituted in this case by the bar 1 driven in rotation.
  • the device according to the invention comprises an adjustable protective cover 21, in the form of a cone open at the top, so as to focus the projection only on the part of the bar to be coated.
  • one or more nozzles 22 are provided which spray CO 2 on the bar, opposite the flame and more concretely at the base of the protective cover 21.
  • the jacks 16 are released so that said bar retracts in a direction opposite to the direction of traction, said retraction causing compression of the coating which improves the cohesion of said coating and which prevents the formation of cracks.
  • the method and the device according to the invention can be implemented work for the production of smooth or fluted coating bars.
  • grooved bars it is advantageous to make grooves of which two consecutive flute bottoms are separated by 0.35 mm and with a radius of curvature of approximately 0.06 mm.
  • the lateral sides of each groove are preferably inclined at 45 °, the height of the groove preferably being equal to 0.11 mm.
  • Such grooves with a uniform and homogeneous coating of the bar allows a dosage more precise coating material on paper.
  • the coating is consisting of a ceramic and the means of protection and limitation (21) are constituted by lateral and adjustable covers, located on either side on the other side of the sleeping bar (1).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Coating Apparatus (AREA)
  • Paper (AREA)

Claims (9)

  1. Vorrichtung zur Herstellung einer Streichstange (1), umfassend einen Rahmen (10), an dem die genannte Streichstange (1) montiert ist, zumindest einen Motor (6), der die genannte Streichstange in eine Drehbewegung versetzt, und Mittel (12, 19) zur Bildung eines Überzugs durch ein thermisches Spritzverfahren, dadurch gekennzeichnet, dass sie darüber hinaus Mittel zum Ziehen (15, 16) eines Endes (4) der genannten Stange umfasst, während das andere Ende (2) unbeweglich gehalten wird, wobei der genannte Zug während der Drehung der genannten Streichstange und während der Bildung des Überzugs durch das thermische Spritzverfahren so ausgeübt wird, dass eine Streckung erfolgt, die einer Verlängerung um etwa 0,2 bis 0,001% entspricht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie darüber hinaus Mittel zum Zentrieren und Halten (17) zumindest eines Teils der Streichstange umfasst.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Mittel zum Zentrieren und Halten (17) durch ein Magnetlager (17), ein Fluidlager oder ein mechanisches Lager gebildet werden.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie darüber hinaus Mittel zum Schutz und zur Begrenzung (21) des Bereichs der Streichstange umfasst, in dem der Überzug aufgespritzt wird.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Mittel zum Schutz und zur Begrenzung (21) durch seitliche, geneigte, einstellbare und zu beiden Seiten der Streichstange (1) angeordnete Abdeckungen gebildet werden.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie darüber hinaus Mittel zur Abkühlung (22) umfasst, wobei sich die genannten Mittel zur Abkühlung gegenüber von der Seite der Stange befinden, die einer Beschichtung durch ein thermisches Spritzverfahren unterzogen wird.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Mittel zur Abkühlung (22) durch Düsen zur Zerstäubung von CO2 gebildet werden.
  8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zum Ziehen durch Zylinder (16) gebildet werden, die am Rahmen montiert sind.
  9. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie darüber hinaus ein Fahrgestell (13) umfasst, das parallel zur Längsrichtung der gezogenen Stange beweglich ist, wobei die Spritzmittel (12), die auf bekannte Weise durch einen Plasmabrenner zum Aufspritzen von Pulvern gebildet werden, auf dem genannten Fahrgestell montiert sind.
EP98952800A 1997-10-27 1998-10-27 Vorrrichtung zum herstellen eines rakelstabes verwendbar in der papierindustrie Expired - Lifetime EP1027471B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9713449A FR2770156B1 (fr) 1997-10-27 1997-10-27 Procede et dispositif de realisation d'une barre de couchage utilisable dans l'industrie papetiere
FR9713449 1997-10-27
PCT/FR1998/002300 WO1999022041A1 (fr) 1997-10-27 1998-10-27 Dispositif de realisation d'une barre de couchage utilisable dans l'industrie papetiere

Publications (2)

Publication Number Publication Date
EP1027471A1 EP1027471A1 (de) 2000-08-16
EP1027471B1 true EP1027471B1 (de) 2001-08-01

Family

ID=9512692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98952800A Expired - Lifetime EP1027471B1 (de) 1997-10-27 1998-10-27 Vorrrichtung zum herstellen eines rakelstabes verwendbar in der papierindustrie

Country Status (7)

Country Link
US (1) US6761768B2 (de)
EP (1) EP1027471B1 (de)
JP (1) JP2001521064A (de)
AT (1) ATE203785T1 (de)
DE (1) DE69801287T2 (de)
FR (1) FR2770156B1 (de)
WO (1) WO1999022041A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840951A1 (de) * 1998-09-08 2000-03-09 Jagenberg Papiertech Gmbh Rakelstange für eine Beschichtungsvorrichtung
US6616977B1 (en) 2002-03-26 2003-09-09 Metso Paper, Inc. Method and arrangement in a drive device of a rod coating station
US6786972B2 (en) * 2002-03-26 2004-09-07 Metso Paper, Inc. Method and arrangement in a drive device of a rod coating station
ITBS20060201A1 (it) * 2006-11-22 2008-05-23 Gian Paolo Marconi Apparato per la metallizzazione di componenti metallici e relativo metodo di metallizzazione
DE102008001721B4 (de) * 2008-05-13 2021-01-14 Voith Patent Gmbh Verfahren zum Beschichten einer Klinge
AU2016374658B2 (en) 2015-12-23 2022-03-31 Commonwealth Scientific And Industrial Research Organisation A rotary device
US12343693B2 (en) 2015-12-23 2025-07-01 Commonwealth Scientific And Industrial Research Organisation Static mixers for continuous flow catalytic reactors

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099481A (en) * 1976-09-30 1978-07-11 Eutectic Corporation Apparatus for applying metal coatings to a metal substrate
US4397893A (en) * 1981-09-08 1983-08-09 Bottoms Clifford C System for flame spray coating of a rod
JPS58204169A (ja) * 1982-05-21 1983-11-28 Nippon Light Metal Co Ltd クラツド材の製造方法
SE437682B (sv) * 1982-10-13 1985-03-11 Inventing Ab Sett och anleggning for att applicera en notningsbestendig beleggning pa ett tunnt metalliskt, bandformigt berarmaterial
SE437681B (sv) * 1982-10-13 1985-03-11 Inventing Ab Schaber eller rakel for kontrollerbar paforing och utjemning av bestrykningsmedel pa en lopande pappersbana
DE68908057T2 (de) * 1988-09-14 1993-11-18 Hitachi Chemical Co Ltd Verfahren zur Herstellung eines metallischen Bandes, beschichtet mit flammgespritzter Keramik.
JPH0376668A (ja) * 1989-08-18 1991-04-02 Yoshida Kogyo Kk <Ykk> 紙送りローラー

Also Published As

Publication number Publication date
US6761768B2 (en) 2004-07-13
FR2770156B1 (fr) 1999-12-24
FR2770156A1 (fr) 1999-04-30
DE69801287D1 (de) 2001-09-06
ATE203785T1 (de) 2001-08-15
EP1027471A1 (de) 2000-08-16
JP2001521064A (ja) 2001-11-06
DE69801287T2 (de) 2002-05-08
US20030084841A1 (en) 2003-05-08
WO1999022041A1 (fr) 1999-05-06

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