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EP1555345A2 - Dispositif d'enduction - Google Patents

Dispositif d'enduction Download PDF

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Publication number
EP1555345A2
EP1555345A2 EP04105787A EP04105787A EP1555345A2 EP 1555345 A2 EP1555345 A2 EP 1555345A2 EP 04105787 A EP04105787 A EP 04105787A EP 04105787 A EP04105787 A EP 04105787A EP 1555345 A2 EP1555345 A2 EP 1555345A2
Authority
EP
European Patent Office
Prior art keywords
curtain
catcher
application
nozzle
distance
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.)
Withdrawn
Application number
EP04105787A
Other languages
German (de)
English (en)
Other versions
EP1555345A3 (fr
Inventor
Stefan Reich
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 Patent GmbH
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 Patent GmbH, Voith Paper Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1555345A2 publication Critical patent/EP1555345A2/fr
Publication of EP1555345A3 publication Critical patent/EP1555345A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • B05C5/005—Curtain coaters
    • 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

Definitions

  • the invention relates to an applicator device according to the preamble of Claim 1.
  • the coating with a generic curtain nozzle, which also as a curtain nozzle is designated takes place without excess of medium. That means it will only applied as much medium as ultimately remain on the web should.
  • This order type is also called a 1: 1 order.
  • curtain coating flows the application medium from the Nozzle and falls substantially to the underlying gravity moving surface to be coated.
  • the curtain nozzle is at a distance above the current Surface arranged that the height of the curtain between 50 and 400 mm is. This drop height has become stable and stretched Curtain best proven.
  • curtain applicators also include curtain catchers which are slidable from a waiting position under the curtain nozzle, that is, more specifically, between the curtain nozzle and the traveling surface. This usually takes place before the start, during interruptions in operation, for example during a web break, and at the end of the coating process. Thus, in this phase from the nozzle already or still emerging application medium is collected. The collected medium flows from the collector laterally and can then be used again after appropriate treatment. With the help of the catcher also device parts are protected from contamination caused by the exiting in said phase application medium.
  • the object of the invention is achieved in that the application head with his Curtain nozzle is rotatable and / or linearly displaceable about an upper point, that the vertical distance of the curtain nozzle to the running surface enlarged and the curtain catcher in the rotated or raised Condition of the curtain nozzle delivered curtain or already existing or can still pick up remaining parts of the curtain.
  • the rotation and / or the linear adjustment can be manual, motorized or also be regulated.
  • a very useful embodiment of the curtain catcher may consist in that it has high side walls. This ensures that the catcher is suitable for higher recording capacities than hitherto. From such a high and also turned up or moved catcher, the collected application medium can also flow better.
  • the previously established adjusted drop heights of the curtain which are between 50 and 400 mm, in particular between 100 and 200 mm, can be maintained.
  • the distance of the curtain nozzle to the running surface is less than the distance between the upper edge of the catcher and the running surface.
  • An advantageous embodiment of the invention may be that the Curtain catcher seen in the running direction of the running surface, the Order header is immediately downstream. The distance is so close to Curtain nozzle chosen that at least already or partially existing Curtain upon rotation or displacement of the nozzle exactly from above into the Interceptors can run. Moving the catcher is no longer necessary thereby reducing the technical and cost of the device.
  • a further advantageous embodiment of the invention is that the curtain nozzle is rotatable counterclockwise.
  • the angle of rotation is about 30 to 60 °, preferably 45 °.
  • a linear adjustment movement in this direction can be provided up to this position (corresponding to 45 °).
  • the vertical distance between the nozzle and the running surface is increased, which has the following advantage:
  • the linear method of the application head or the nozzle has the advantage that the outflow direction of the curtain during the movement is not changes. This ensures that an already trained curtain is stable remains.
  • a further advantageous embodiment of the invention is to that an additional catcher of only small cross-sectional area is provided.
  • This additional interceptor comes during the linear Method or the rotation of the curtain nozzle from the operating position to the Falling position used when the application medium already or still out of the Nozzle flows or drips. This amount to be collected is absolutely extreme low, whereby the dimensions of the collecting device also kept small can be. Therefore, this catcher only needs to be very flat Tub with small cross-sectional area, which is only a fraction of the actual Curtain catcher is to be trained.
  • the design of the additional catcher is advantageous on a Base area that is parallel to the travel path of the application head.
  • the high side walls and thus the Cross-sectional area of the curtain catcher it allows its ground area of the middle ago in the lateral direction, that is transverse to the direction of the Surface according to leader and / or the driving side of the coating machine, with particularly strong inclination is formed. This bending improves the flow behavior of the order medium from the interceptor considerably. Furthermore can thus avoid the dreaded Abspritzept.
  • FIG. 1 is a schematic view of a curtain coater 1 according to the prior art. The device 1 is shown in the operating state.
  • a gun 2 is a distribution chamber 3 for the intended application medium, the distribution chamber 3 on the output side merges into a slot-shaped and over the entire width of the device 1 and the applicator head extending curtain nozzle 4.
  • the curtain nozzle 4 are in the example pigment-containing high-viscosity coating color of about 1000 Pas in the form of a curtain 5 to a running surface 7 from.
  • a web of paper or board running in direction L via guide rolls 6 (in the example only one roll 6 is shown) is selected, which is coated directly.
  • the set height H c is here in the example 200 mm, in which the flat catcher 8 as shown in Figure 2, while easily slide under the nozzle 4 and the curtain 5, but the high-viscosity application medium used not in the direction of the leader and / or drive side of the device can run and therefore the drip pan 8, as indicated in dashed lines in Figure 2 , overflows.
  • FIG. 3 shows the device 1 'according to the invention.
  • the curtain catcher 8 ' ie the collecting trough
  • the bottom surface 8b of the catcher 8' is at approximately the same height as in the prior art according to FIGS. 1 and 2 .
  • the applicator head 2 is rotatably mounted about an upper point P such that its applicator nozzle 4 can easily deliver the started curtain 5 (or curtain 5 still running when the device is stopped) to the curtain catcher 8 '.
  • the distance H c is less than the distance H w .
  • the catcher 8 'or its bottom surface 8b is thereby also better with an increased inclination angle in the direction of the driver and / or driving side of the manufacturing and / or finishing or coating machine, not shown formed.
  • An increased angle of inclination allows, above all, the improved running of the application medium from the receiver, which is important above all with high viscosity of the application medium.
  • the dashed line 9 within the catcher 8 ' is intended to indicate the bending line to form the angle of inclination.
  • the curtain catcher 8 'seen in the running direction L of the running surface 7 is located immediately downstream of the application head 2.
  • the applicator head 2 is rotatable with its curtain nozzle 4 in the counterclockwise direction, in order to be able to pick up the medium already dispensed or still delivered by the curtain nozzle 4 (at start / stop and / or interruption of operation of the device 1 ').
  • the rotation is indicated by D and double arrows in FIG .
  • FIG. 4 shows a device 1 "which is changed with respect to the adjustment device of the application head 2 in comparison with the device shown in FIG. In this embodiment, its linear movability from the operating position I to the start / stop position II, and vice versa, indicated obliquely illustrated double arrows V (for movability). (Incidentally, the positions I and II are also shown in the other figures 1 to 3).
  • FIG. 4 Also shown in Figure 4 is a somewhat modified catcher 10, here designated 10 ", which catcher 10" is directly connected to the curtain catcher 8 'and therefore fixedly positioned.
  • the curtain catcher 8 ' is formed, as in FIG. 3, with high side walls 8a, the folding line 9 and at the same distance a from the running surface 7.
  • the collecting device has a run-off surface 10a "inclined or rising in the running direction L.
  • FIGS. 3 and 4 are interchangeable. So can on the one hand a fixed Collecting device 10 "just as with a gun to be rotated according to Figure 3 and on the other hand a displaceable device 10a according to FIG. 3, in the case of linear movable applicator head according to Figure 4 are used.

Landscapes

  • Coating Apparatus (AREA)
EP04105787A 2003-12-17 2004-11-16 Dispositif d'enduction Withdrawn EP1555345A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10359114 2003-12-17
DE2003159114 DE10359114A1 (de) 2003-12-17 2003-12-17 Auftragsvorrichtung

Publications (2)

Publication Number Publication Date
EP1555345A2 true EP1555345A2 (fr) 2005-07-20
EP1555345A3 EP1555345A3 (fr) 2010-12-15

Family

ID=34609491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105787A Withdrawn EP1555345A3 (fr) 2003-12-17 2004-11-16 Dispositif d'enduction

Country Status (2)

Country Link
EP (1) EP1555345A3 (fr)
DE (2) DE20321850U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008336A1 (fr) * 2004-07-20 2006-01-26 Metso Paper, Inc. Unite et procede de couchage par voile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT525584B1 (de) * 2021-11-12 2024-04-15 Valmet Technologies Oy Faserbahnproduktionslinie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19716647A1 (de) 1997-04-21 1998-10-22 Jagenberg Papiertech Gmbh Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn
DE19903559B4 (de) * 1998-01-30 2004-02-26 Mitsubishi Paper Mills Limited Verfahren und Apparatur zur Vorhangbeschichtung
JP4113985B2 (ja) * 1998-07-22 2008-07-09 富士フイルム株式会社 塗布方法及び装置
DE10012345A1 (de) * 2000-03-14 2001-09-20 Voith Paper Patent Gmbh Vorhang-Auftragsvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008336A1 (fr) * 2004-07-20 2006-01-26 Metso Paper, Inc. Unite et procede de couchage par voile

Also Published As

Publication number Publication date
DE10359114A1 (de) 2005-07-21
EP1555345A3 (fr) 2010-12-15
DE20321850U1 (de) 2011-03-03

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