EP1040227B1 - Buse fendue pour enduire des bandes de materiau, notamment des bandes de papier ou de carton avec une sauce de couchage au pigment - Google Patents

Buse fendue pour enduire des bandes de materiau, notamment des bandes de papier ou de carton avec une sauce de couchage au pigment Download PDF

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Publication number
EP1040227B1
EP1040227B1 EP98956850A EP98956850A EP1040227B1 EP 1040227 B1 EP1040227 B1 EP 1040227B1 EP 98956850 A EP98956850 A EP 98956850A EP 98956850 A EP98956850 A EP 98956850A EP 1040227 B1 EP1040227 B1 EP 1040227B1
Authority
EP
European Patent Office
Prior art keywords
distribution chamber
slot nozzle
outlet channel
web
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
Application number
EP98956850A
Other languages
German (de)
English (en)
Other versions
EP1040227A1 (fr
Inventor
Ingo Becker
Reinhard Knop
Bernd Bohnenkamp
Bernd Genenger
Max Brand
Gerhard SÜNDERHAUF
Albrecht FÄRBER
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1040227A1 publication Critical patent/EP1040227A1/fr
Application granted granted Critical
Publication of EP1040227B1 publication Critical patent/EP1040227B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/04—Curtain coater

Definitions

  • the invention relates to a slot nozzle for coating material webs, in particular paper or cardboard webs with pigment coating, with a slot-shaped outlet channel, which extends over the working width, and a distribution chamber extending over the working width to which the Outlet channel is connected.
  • the slot nozzle is made up of two Lips formed from which a free jet of coating material is pressed against the web or - in the case of indirect application - is directed against a roller.
  • the stake a slot nozzle as a free jet nozzle for coating paper webs is in DE 296 10 773-U.
  • the invention is therefore based on the object of a generic slot nozzle to improve that it is able to run on large width paper or cardboard webs also small amounts of pigment coating ink under fluctuating conditions, z.
  • the slot nozzle according to the invention offers the possibility of the flow conditions in the distribution chamber over the working width via the supplied volume flows influence.
  • connection of a feed channel to the distribution chamber as Diffuser according to claim 3 causes the flow rate at Entry into the distribution chamber significantly reduced. This prevents the Brush paint from the walls and thus vortexes that lead to uneven flow conditions would lead.
  • Inclined diffusers connected to the distribution chamber according to claim 4 make it possible to use long diffusers with a low overall height and these on the to connect essentially straight supply channels fed from one side. There the coating color with high flow velocity within the feed channels is promoted, curvatures in the feed channels could be sensitive Coating colors lead to undesired segregation effects.
  • the nozzles shown in the figures are used to apply pigment coating ink onto a paper or cardboard web B.
  • the pigment coating ink is either applied directly the paper or cardboard web B or first applied to a roller, the then passes the film of coating color to web B.
  • the slot nozzle is used either as a curtain nozzle or as a free jet nozzle. When used as a curtain nozzle, it is across the web B across Working width arranged arranged, and the coating color occurs in a free-falling Curtain V out of it.
  • the different ways of arranging one Slot nozzle as a curtain nozzle within a coating system for coating of paper or cardboard webs with pigment coating color and their mode of operation described in great detail in German patent application 197 16 647.4 which is expressly referred to.
  • a free jet S of coating color comes under pressure from the slot nozzle, which is directly against web B or - with indirect application - is directed against a roller.
  • the free jet nozzle is usually in relation to the web B to be coated or the tangent to the roller to be coated so arranged that the liquid jet S at an acute angle to the direction of movement the web B or roller hits.
  • the nozzle body the slot nozzle from two wall-shaped parts 1, 2 with one of the desired Working width corresponding length.
  • a longitudinal groove is incorporated, which after joining the two parts 1, 2 forms a distribution chamber 3.
  • the two parts 1, 2 each face-ground Inner surfaces with which they are joined and using fastening screws 4 are held together.
  • One of the two transverse walls delimiting the distribution chamber 3 - in FIGS. 2 and 3 the lower transverse wall 5 - is of a slightly lower height than the other, upper Transverse wall 6 formed so that when assembling a distance from the wall part 2 remains in this area a slit-shaped, over the working width Extending outlet channel 7 to form, which is connected to the distribution chamber 3 and from which the coating color emerges.
  • the gap width of the outlet channel 7 to be able to adjust the working width differently in individual areas, the outlet channel 7 on the one hand from the inner surface of the wall part 2, on the other limited by an inserted bar 8, which on the inner surface of the lower Cross wall 5 is screwed by means of screws 9.
  • the insert bar 8 has below the fastening screw 9 on its side facing away from the outlet gap 7 Side a longitudinal slot, so that a weak point 10 arises to be lower part can be bent to adjust the gap width.
  • the lower part of the Insert bar 8 has the necessary distance for the required adjustment the inner surface of the transverse wall 5.
  • the adjustment of the gap width of the outlet channel 7 is carried out by means of wedges arranged at regular intervals across the working width 11, which in a longitudinal groove of the lower transverse wall 5 parallel to the outlet channel 7 are movably arranged and support the insert bar 8 on its back.
  • the Wedges 11 lay the distance of the insert strip 8 from the wall part 2 and thus the Gap width of the outlet channel 7 in their area.
  • the setting of the position each wedge 11 is done by means of an adjusting screw 12.
  • each clamping screws 13 arranged, of which the insert bar 8 against the wedges 11 and thus can be clamped against the transverse wall 5.
  • Keys 14 prevent a between the transverse wall 5 and the upper region of the insert bar 8 Shift of the insert bar 8 parallel to the outlet channel 7 when setting the Gap width.
  • the inner surfaces of the transverse wall 5 and the insert strip 8 are preferred, of which the lower boundary wall of the distribution chamber 3 is formed, aligned with one another and inclined in the direction of the outlet channel 7 designed so that the coating color is led to the outlet channel 7.
  • the width of the outlet channel 7 is between 150 ⁇ m and 600 ⁇ m, preferably between 250 ⁇ m and 350 ⁇ m.
  • the width of the outlet channel is 7 700 ⁇ m to 1300 ⁇ m.
  • the height measured parallel to the outlet channel 7 is Distribution chamber 3 10 mm to 100 mm, preferably 20 mm to 60 mm. If the height is more than 20 mm, its width is less than its height.
  • the height of the distribution chamber 3 is 40 mm to 150 mm. The is preferably Width between 50% and 60% of the height.
  • the upper transverse wall 6 of part 1 has inlet openings at regular intervals 15, on which, as shown in FIG. 5, feed channels 16 for feeding Coating color are connected in the distribution chamber 3.
  • Feed channels 16 have a connection distance between 100 mm and 1500 mm, preferably between 500 mm and 800 mm.
  • the connection of one is preferred each feed channel 16 to the distribution chamber 3 formed as a diffuser, so due to the increasing flow cross-section the flow velocity at Entry into the distribution chamber 3 drops.
  • the diffusers are each from the Opening 15 formed in the transverse wall 5 and a screwed-on diffuser part 17, to which a feed channel 16 is attached in each case.
  • the openings 15 and the diffuser part 17 are preferred Diffusers designed and arranged so that they are towards the side edge are connected to the distribution chamber 3 inclined to the vertical.
  • the diffusers are connected in such a way that a boundary wall (the left one in FIG. 1) Boundary wall) at an angle ⁇ between 0 ° and 90 °, preferably between 30 ° and 60 ° connected to the upper boundary wall of the distribution chamber 3 is, the opposite boundary wall of the diffuser at an angle ⁇ between 10 ° and 45 °.
  • the boundary wall of the diffuser is on the Supply side immediately before connection to the distribution chamber 3 after curved outside to further enlarge the cross section and the radius of the To make the deflection as large as possible. In the exemplary embodiment, this is done by a corresponding curvature of the inlet side forming the last part of the diffuser Wall 18 of the inlet opening 15 causes.
  • the boundary wall 18 designed in this way of the diffuser prevents the coating color from detaching from the walls and thus Eddies that would cause the coating color to separate.
  • the slot nozzle is closed by side plates 19 on its end faces.
  • a curtain nozzle is on each side immediately next to the outlet channel 7 downwardly extending guide element 20 arranged that a constriction counteracts the curtain V of coating color falling from the outlet channel 7.
  • each feed channel 16 has a device 22 Setting the volume flow to.
  • hose clamp valves are preferred for the Volume flow setting used.
  • Diaphragm valves possible.
  • each feed channel contains a measuring device 23 to determine the current volume flow so that it is individually regulated can be; z. B. inductive or ultrasonic volume flow meters 23rd
  • FIG 6 an embodiment of a nozzle is shown schematically, the construction is particularly simple. This structure is useful if there are no control elements Cross profile control are required, ie the width of the outlet channel 7 over the Working width does not have to be adjustable differently.
  • the nozzle body is made of two Parts 1, 2 assembled, each having a flat ground inner surface.
  • the left part 1 in Figure 6 - is the distribution chamber 3 as a longitudinal groove incorporated.
  • the Inner surfaces of the two transverse walls 5, 6 designed in alignment.
  • the thickness of the desired gap width of the outlet channel 7 equivalent. So when assembling the two parts 1, 2 in the area below the distribution chamber 3, the lower transverse wall 5 on the thickness of the flat material 24 held appropriate distance from the inner surface of part 2. It forms the outlet channel 7 with the desired gap width.
  • FIG. 7 shows an embodiment with one between the first distributor chamber 3 and the outlet channel 7 arranged second distribution chamber 25. Between the first distribution chamber 3 and the second distribution chamber 25 is located additional flow channel 26, which further smoothes the flow causes.
  • the heating or cooling elements 27 are arranged on one or both longitudinal walls of the nozzle body of the slot nozzle, as shown in FIG.
  • the heating or cooling elements 27, for example Peltier elements, resistance wires etc. are arranged at a distance of 100 mm and more across the working width, Their heating or cooling capacity can be regulated individually in order to target individual Areas.
  • a climatic chamber 28 As shown in Figure 7.
  • the climatic chamber becomes a temperature-controlled medium, for example water or air introduced via a feed line 29 to the temperature of the nozzle at a desired Keep value constant.
  • Figure 8 is the cross section of a slot nozzle when used as a free jet nozzle shown, by means of which the coating color is supported on a counter-roller 30 Paper or cardboard web B is applied.
  • the slot nozzle also has a slot-like shape when used as a free jet nozzle Exit channel 7, which extends across the working width.
  • the slit-shaped Exit channel 7 is delimited by two lips 31, 32, one of which - in Embodiment, the lip 31 on the outlet side - by means of a series of adjusting elements 33 differently adjustable in zones from one another to their other lip 32 is to set a uniform cross profile.
  • the width of the outlet channel 7 is when used as a free jet nozzle set to the mentioned 700 ⁇ m - 1300 ⁇ m.
  • the distribution chamber 3 is delimited by two side walls 1, 2, which on the Inlet side are screwed to a transverse wall 34 by means of screws 35, of which they are kept at the desired distance for the chamber width.
  • At the One side of the lips 31, 32 is attached to each side wall 1, 2 on the outlet side.
  • the structure of the free jet nozzle essentially corresponds to that in FIGS Figures 1 and 5 shown slot nozzle:
  • the connection distance of the feed channels 16 is also 100 mm to 1500 mm, preferably 500 mm to 800 mm.
  • the connection of a feed channel 16 to the distribution chamber 3 as a diffuser formed, the diffusers towards the side edge under the at Embodiment according to Figures 1 to 5 angles inclined to the Distribution chamber 3 are connected.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)

Claims (15)

  1. Buse fendue pour enduire des bandes de matière (B), en particulier des bandes de papier ou de carton, avec une sauce de couchage au pigment,
    avec un canal de sortie en forme de fente (7), qui s'étend sur la largeur de travail, et
    une chambre de répartition (3) s'étendant sur la largeur de travail, à laquelle le canal de sortie (7) est raccordé,
    caractérisée en ce qu'à la chambre de répartition (3) sont raccordés au moins deux canaux d'alimentation (16), qui présentent chacun un dispositif (22) pour l'ajustage du courant volumique d'alimentation de matière d'enduction.
  2. Buse fendue suivant la revendication 1, caractérisée en ce que les canaux d'alimentation (16) sont disposés sur le côté opposé au canal de sortie (7) et la distance de raccordement entre deux canaux d'alimentation (16) vaut de 100 mm à 1500 mm, de préférence de 500 mm à 800 mm.
  3. Buse fendue suivant la revendication 1 ou 2, caractérisée en ce que le raccordement d'un canal d'alimentation (16) à la chambre de répartition (3) a la forme d'un diffuseur.
  4. Buse fendue suivant la revendication 3, caractérisée en ce que les diffuseurs sont raccordés à la chambre de répartition (3) avec une inclinaison, par rapport à la verticale, en direction du bord latéral.
  5. Buse fendue suivant la revendication 4, caractérisée en ce qu'une paroi de limitation du diffuseur est raccordée à la chambre de répartition (3) avec un angle α compris entre 0° et 90°, de préférence entre 30° et 60°, et la paroi de limitation opposée y est raccordée avec un angle β compris entre 10° et 45°.
  6. Buse fendue suivant l'une quelconque des revendications 1 à 5, caractérisée en ce qu'une vanne à pince pour tuyau souple est intégrée dans chaque canal d'alimentation (16) pour l'ajustage du courant volumique.
  7. Buse fendue suivant l'une quelconque des revendications 1 à 6, caractérisée en ce qu'une série d'éléments de chauffage ou de refroidissement (27) sont disposés sur une ou sur les deux parois longitudinales du corps de la buse.
  8. Buse fendue suivant l'une quelconque des revendications 1 à 7, caractérisée en ce qu'elle est disposée dans une chambre climatisée (28).
  9. Buse fendue suivant l'une quelconque des revendications 1 à 8, caractérisée en ce que le corps de la buse est composé de deux parties (1, 2), qui présentent chacune une face intérieure plane polie, la chambre de répartition (3) étant usinée sous la forme d'une rainure dans une partie et une matière plate (24) étant, lors de l'assemblage, insérée dans la région située au-dessus de la chambre de répartition (3), en vue de maintenir la région située en dessous de la chambre de répartition (3) à la distance désirée pour former le canal de sortie (7).
  10. Dispositif pour appliquer une sauce de couchage au pigment sur une bande de papier ou de carton (B), caractérisé en ce qu'une buse fendue s'étendant transversalement à la direction de défilement de la bande est disposée au-dessus de la bande (B), à partir de laquelle la sauce de couchage est appliquée sur la bande (B) en un rideau en chute libre (V), la buse fendue présentant les caractéristiques d'une ou de plusieurs des revendications 1 à 9.
  11. Dispositif suivant la revendication 10, caractérisé en ce que le canal de sortie (7) de la buse fendue présente une largeur de fente de 150 µm à 600 µm, de préférence de 250 µm à 350 µm.
  12. Buse fendue suivant la revendication 10 ou 11, caractérisée en ce que la chambre de répartition (3) présente une hauteur de 10 mm à 100 mm, de préférence de 20 mm à 60 mm, mesurée parallèlement au canal de sortie (7).
  13. Dispositif pour appliquer une sauce de couchage au pigment sur une bande de papier ou de carton (B), caractérisé en ce qu'une buse fendue suivant les revendications 1 à 9, s'étendant transversalement à la direction de défilement de la bande, est disposée sur la bande (B), buse de laquelle la matière d'enduction sort sous pression en un jet libre (S).
  14. Dispositif suivant la revendication 13, caractérisé en ce que le canal de sortie (7) de la buse fendue présente une largeur de fente de 700 µm à 1300 µm.
  15. Dispositif suivant la revendication 13 ou 14, caractérisé en ce que la chambre de répartition (3) présente une hauteur de 40 mm à 150 mm, mesurée parallèlement au canal de sortie (7).
EP98956850A 1997-12-15 1998-10-17 Buse fendue pour enduire des bandes de materiau, notamment des bandes de papier ou de carton avec une sauce de couchage au pigment Expired - Lifetime EP1040227B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19755625 1997-12-15
DE19755625A DE19755625A1 (de) 1997-12-15 1997-12-15 Schlitzdüse zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen mit Pigmentstreichfarbe
PCT/EP1998/006587 WO1999031321A1 (fr) 1997-12-15 1998-10-17 Buse fendue pour enduire des bandes de materiau, notamment des bandes de papier ou de carton avec une sauce de couchage au pigment

Publications (2)

Publication Number Publication Date
EP1040227A1 EP1040227A1 (fr) 2000-10-04
EP1040227B1 true EP1040227B1 (fr) 2003-01-08

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EP98956850A Expired - Lifetime EP1040227B1 (fr) 1997-12-15 1998-10-17 Buse fendue pour enduire des bandes de materiau, notamment des bandes de papier ou de carton avec une sauce de couchage au pigment

Country Status (5)

Country Link
US (1) US6471775B1 (fr)
EP (1) EP1040227B1 (fr)
AT (1) ATE230815T1 (fr)
DE (2) DE19755625A1 (fr)
WO (1) WO1999031321A1 (fr)

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DE102006007555B4 (de) * 2006-02-16 2019-09-19 Illinois Tool Works Inc. Klebstoffauftragsystem und Verfahren zum kontaktlosen Auftragen eines Klebstofffilms auf ein flächiges Substrat
DE102008033248A1 (de) * 2008-07-15 2010-01-28 Düspohl Maschinenbau Gmbh Verfahren zum Lackieren eines Substrats mit einem strahlungshärtenden Lack
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BR112017028053A2 (pt) * 2015-06-26 2018-12-11 Oil & Gas Tech Entpr C V montagem de bico para lavagem com geração de vórtice
CN105170410B (zh) * 2015-10-13 2017-05-03 海宁宏远产业用布有限公司 一种用于隔离网栅的刮涂系统
CN109759284B (zh) * 2019-03-21 2023-12-15 泉州市大疆涂布设备有限公司 便于垫片快速精准更换的涂布机涂布模头
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Also Published As

Publication number Publication date
EP1040227A1 (fr) 2000-10-04
ATE230815T1 (de) 2003-01-15
US6471775B1 (en) 2002-10-29
WO1999031321A1 (fr) 1999-06-24
DE19755625A1 (de) 1999-07-01
DE59806893D1 (de) 2003-02-13

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