CN100390355C - Curtain coater unit of a paper/board machine - Google Patents

Curtain coater unit of a paper/board machine Download PDF

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Publication number
CN100390355C
CN100390355C CNB2004800151241A CN200480015124A CN100390355C CN 100390355 C CN100390355 C CN 100390355C CN B2004800151241 A CNB2004800151241 A CN B2004800151241A CN 200480015124 A CN200480015124 A CN 200480015124A CN 100390355 C CN100390355 C CN 100390355C
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CN
China
Prior art keywords
curtain coater
air
framing component
coater unit
material web
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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 - Fee Related
Application number
CNB2004800151241A
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Chinese (zh)
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CN1802470A (en
Inventor
海基·瓦塔宁
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Valmet Technologies Oy
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Metso Paper Oy
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Publication date
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of CN1802470A publication Critical patent/CN1802470A/en
Application granted granted Critical
Publication of CN100390355C publication Critical patent/CN100390355C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • 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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters

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  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The aim of the present invention is to provide a curtain coater unit (1) of a paper/board machine for coating a material web (W). The curtain coater unit (1) comprises a frame element (2) located above the material web (W), a curtain coater (4) connected to the frame element (2), from which curtain coater the coating agent (20) can be fed as as curtain-like stream onto the surface of the material web (W) at an impact point (21), and boundary-layer air (A) exhaust means (5, 3, 3a). The boundary-layer air (A) exhaust means (5, 3, 3a) are connected with the frame element (2). At least a part of the frame element (2) is fitted between the material web (W) and the curtain coater (4).

Description

The curtain coater unit of paper/board machine
Technical field
The present invention relates to a kind of curtain coater unit that is used for the coating material breadth (curtain coater unit) of paper/board machine.This curtain coater unit comprises: framing component, and it is positioned at the top of this material web; Curtain coater, it is connected to this framing component, and smears (coating agent) can supply on the surface of the material web of impact position from this curtain coater with the form of curtain shape fluid; And the tapping equipment of boundary layer air.
Background technology
The common structure and the operation thereof that are used for the curtain coater unit of paper/board machine are known, for example, from disclosed application FI 19991863, can learn, curtain coater unit is made of the jet beam (nozzle beam) of elongation, this jet beam is installed on material web top, the support frame, and is transverse to the direct of travel of material web to be coated.The smears is by the wide nozzle segment or corresponding feeder (feeder) part of jet beam, for example the inclined plane is coated on the surface of the material web that moves below this nozzle towards the form of impact position (zone that curtain falls in the breadth) with curtain shape fluid.In addition, in the zone before impact position, the tapping equipment of the boundary layer air that the installation nozzle segment separates, it engages with material web.The tapping equipment of this boundary layer air comprises the suction face that is mounted to towards the surface of material web to be coated, makes the lip-deep air layer of material web suck in the air doctor blade (air doctor) between delivery pipe and suction face and the impact position by this suction face.
The problem of such curtain coater unit is, under the situation of load variations, is difficult to control support frame, thereby is difficult to control the glacing flatness of jet beam.Even nozzle unit has only the most small inclination, also can influence the size of nozzle slot, thereby influence the feed speed (feed rate) of smears to be supplied with.At present, can solve these problems by making enough firm jet beam.Be difficult to make but the structure of this curtain coater unit is big, and make expensive.Although Wai Bu mechanical load remains unchanged basically under normal conditions, the unsettled thermic load around the nozzle segment, the actual thermal expansion of nozzle segment and air-flow can bring the problem of the amount of extra control glacing flatness and smears to be supplied with.The heat that takes the curtain coater unit zone along material web to can cause variation of temperature.Now, by curtain coater unit being arranged in the so-called calibration chamber, can eliminating or reduce at least by the caused problem of variations in temperature to keep the constant temperature around the curtain coater unit.This calibration chamber is large space or the chamber that keeps being suitable for being coated with, especially being suitable for the main surrounding environment of support frame and jet beam.But this settling mode can take very big sky and ask, and very expensive.
Summary of the invention
The purpose of this invention is to provide a kind of curtain coater unit, can eliminate or can reduce some above-mentioned shortcomings basically by this curtain coater unit.
To achieve these goals, the invention is characterized in that the tapping equipment of boundary layer air is connected with framing component, at least a portion of this framing component is installed between the jet beam of material web and curtain coater.
According to the present invention, a kind of curtain coater unit that is used for the coating material breadth of paper/board machine is provided, this curtain coater unit comprises: curtain coater, it is positioned at the top of material web, and the smears can supply to from this curtain coater with the form of curtain shape fluid on the surface of material web of impact position; And the tapping equipment of boundary layer air, it is characterized in that, this curtain coater unit comprises framing component, the tapping equipment of this boundary layer air is set by this framing component, and at least a portion of at least a portion of this framing component and the tapping equipment of this boundary layer air is installed between material web and this curtain coater, and the tapping equipment of this framing component and this boundary layer air forms the cover body of this curtain coater together.
By structure according to curtain coater unit of the present invention, can partially or even wholly avoid the influence (variations in temperature and air-flow) of external load and other to be unfavorable for applying the factor of smears, otherwise will directly have influence on curtain coater or smears curtain to be applied.Simultaneously, the structure of this curtain coater unit can be installed in littler, the compacter space, and can more easily realize the Desired Height of smears curtain.
The preferred embodiments of the present invention are disclosed in the dependent claims.
Description of drawings
Below with reference to the accompanying drawings the present invention is described in more detail, wherein:
Fig. 1 shows the cutaway view according to curtain coater unit of the present invention; And
Fig. 2 shows another embodiment according to curtain coater unit of the present invention.
The specific embodiment
Fig. 1 shows according to curtain coater unit of the present invention, and this curtain coater unit is by Reference numeral 1 sign.Curtain coater unit 1 is located at the top of the material web W that advances on its guide rail (track) substantially.This curtain coater unit 1 comprises curtain coater 4 or application beam.The nozzle segment of the essentially identical application beam 4 of width by its width and material web W or such as the corresponding supply part on inclined plane, the smears forms the curtain 20 identical with the width of material web W, and this curtain is coated on the surface of the material web W that impact position 21 moves from predetermined altitude.
Application beam 4 for example is arranged in the framing component 2 of curtain coater unit 1 by the supporter that engages with framing component 2.Framing component 2 is in the extension in a lateral direction of material web W.The cross section of framing component 2 is preferably c-shaped, this means that a side of this framing component 2 is opened wide, and the curved wall of this framing component 2 (curved wall) has limited space 10.Therefore, the shape of cross section can make this application beam pass above-mentioned open side at least in part and be assembled in the space 10.As can be seen from Figure 1, framing component 2 partly remains between lower the material web W and application beam 4.Thereby framing component 2 self has formed the cover body of application beam 4, and this cover body has stoped basically and will be harmful to air-flow and heat by breadth W and be carried to path on this application beam 4.Application beam 4 is positioned at space 10 in the mode that its nozzle segment is positioned at these 10 outsides, space, this means that smears 20 can cross the wall that is formed by space 10 by this nozzle segment and apply, and further be coated to below on the material web W at impact position 21 places that move.The material that is used to make framing component 2 is generally steel.Also can use heat-insulating material to be coated with or cover framework member 2 to improve thermal insulation.
Also be provided with the tapping equipment 5 and 3 of boundary layer air A, it engages with framing component 2, and tapping equipment 5 and 3 preferably is positioned at the position of impact position 21 fronts with respect to the direct of travel of material web W.Boundary layer air A is the air layer that forms on the surface of material web W, and it moves together in company with the material web W in advancing.The tapping equipment of boundary layer air A comprises inlet box 5 etc., is formed with towards the suction face of material web W in this inlet box 5.For example constitute opening on this suction face, boundary layer air is passed this opening and is moved to the inlet box 5 from the surface of material web W.This inlet box 5 also links to each other with suction line 3, boundary layer air A can be removed from the zone of material web W and impact position 21 by this suction line 3.Suction line is set to link to each other with the outer surface of the wall of framing component 2, that is to say, suction line is arranged on the side of the wall relative with application beam 4.In the present embodiment, suction line 3 preferably constitutes by the curved wall of framing component 2 and apart from the duct element 30 of the outer surface one segment distance setting of this curved wall, and described duct element is surrounded the outer surface of framing component 2 basically.Thereby suction line forms in the space that remains between framing component 2 and the duct element.In addition, in order to strengthen removing of air, the doctor blade device 5b of elongation is set in impact position 21 fronts preferably, it is connected with inlet box 5, and this doctor blade device 5b is arranged on the direction with the traffic direction crosscut of this material web W.
By this set, boundary layer air A can be removed with the surface of controllable mode from material web W.Simultaneously, flow air A and part duct element are isolated and are taken away heat in suction line 3, otherwise this heat will be delivered to framing component 2 from material web W, and further are delivered to application beam 4.In addition, suction line 3 is made long enough, so that flow air A can cross the zone of different temperatures among the material web W reposefully therein, thereby the heat that may be delivered to framing component 2 and application beam 4 can distributing in framing component 2 and application beam 4 in a lateral direction as far as possible equably.According to the present invention; application beam 4 is arranged in same bearer bar shelf structure with the tapping equipment 5 and 3 of boundary layer air A; thereby can obtain compact structure; the equipment that wherein influences different performance can be arranged on their better position; for example, can more easily obtain the Desired Height of smears curtain 20.
Fig. 2 shows the schematic diagram of another preferred embodiment of the present invention.In this case, curtain coater unit 1 is also by constituting according to framing component 2 first embodiment, that be positioned partially between material web W and the application beam 4, and application beam 4 is positioned at the space 10 that the wall by framing component 2 forms at least in part.Except suction line 3, the device that also other can be used to handle air is arranged to engage with framing component 2, will describe described structure and the operation that is used to handle the device of air below in more detail.
Control the interior smears curtain 20 in zone of impact position 21 by stable air (stabilisation air) C, this stable air C is fed to the zone of impact position 21 via blowing device 7,7a, 7b, and removes from the zone of impact position 21 via tapping equipment 6,6a, 6b.
The blowing device of stable air C comprises blower pipe 7a, and it is sent to curtain coater unit 1 with stable air C.Stable air C from blower pipe 7a is fed into distributing pipe 7.Distributing pipe 7 be formed on the inner surface (surfaces of application beam 4 one sides) of the curved wall that remains in framing component 2 and the duct element 70 that is provided with apart from this inner surface one segment distance between the space in.One end of distributing pipe 7 forms the nozzle segment 7b of the blowing device of stable air C, and this nozzle segment 7b is assembled on the whole width of smears curtain 20, with suitable power guiding stable air in the zone of impact position 21.Because the distributing pipe 5 of elongation forms with framing component 2 with engaging, therefore the blower pipe 7a of reality can be installed in apart from the material web W position enough far away, so that be carried to the temperature that heat on every side can not influence the stable air C that blows basically from material web W.
Thus, stable air C can remove by tapping equipment 6,6a, 6b, and wherein suction line 6b is installed on the front, the position near nozzle segment 7b of impact position 21.As the extension of suction line 6b, be provided with transfer tube 6.This transfer tube 6 is formed into consistent according to the transfer tube of describing among first embodiment 3.In other words, transfer tube 6 is formed on the outer surface of framing component 2 and second pipe component 16 that is provided with apart from this framing component 2 one segment distances between the space in.One end of transfer tube 6 is provided with the actual discharge pipe 6a with the breadth crosscut, and 6a removes stable air C from curtain coater unit 1 by this actual discharge pipe.7a is the same with blower pipe, and delivery pipe 6a also is provided with away from material web W as much as possible, and is positioned as close to framing component 2, thereby can keep the compact conformation of curtain coater unit 1.
In another preferred embodiment of the present invention, except above-mentioned pipeline, also be provided with blowing device 8,8a, the 8b of tapping equipment 5,3,3a and support air (support air) B of the boundary layer air A that is connected with framing component 2.
Here, the tapping equipment of boundary layer air A comprises inlet box 5 etc., and this inlet box 5 is installed in the front of the suction line 6b on the traffic direction of material web W, and near suction line 6b.As the extension of inlet box 5, be provided with the transfer tube 3 of boundary layer air A.In this case, transfer tube 3 is formed on and remains between second pipe component 60 and the 3rd pipe component 30 ' that is provided with apart from framing component 2 one segment distances.Thereby the 3rd pipe component 30 ' also forms the outermost surface or the cover body of curtain coater unit 1, and its part is isolated jet beam 4 and the heat that is discharged by material web.Be provided with the actual discharge pipe 3a that is transverse to guide rail in the end away from the transfer tube 3 of material web as far as possible, 3a can remove boundary layer air A from curtain coater unit 1 by this actual discharge pipe.
Blowing device 8,8a, the 8b of support air B also are installed, and it engages with tapping equipment 5,3, the 3a of boundary layer air A, the air B of backing material breadth W can be blown on the surface of material web W with low pressure by blowing device 8,8a, 8b.Usually, blowing pressure is 5 to 10 Pascals, but also can depart from this numerical value.The blowing device 8 of support air B, 8a, 8b comprise blower pipe 8a, and support air B can be delivered to curtain coater unit 1 by this blower pipe 8a.In this case, blower pipe 8a is arranged in the suction line 3 that is limited by second pipe component 60 and the 3rd pipe component 30 ', and closes on the delivery pipe 3a of boundary layer air A.As the extension of blower pipe 8a, be provided with distributing pipe 8, be supplied in this distributing pipe 8 from the support air B of blower pipe 8a.Pipe component 60 and 30 ' is provided with in a certain distance apart from one another, so that distributing pipe 8 can be arranged in the transfer tube 3 that is limited by pipe component 60 and 30 '.In Fig. 2, distributing pipe 8 is the pipes 8 that remain between the member shown in broken lines 80, so suction line 3 surrounds this distributing pipe 8 basically.One end of distributing pipe 8 is formed with nozzle segment 8b, this nozzle segment 8b be preferably mounted at material web W around, and be connected with inlet box 5.Support air B is directed on the whole width on material web W surface by this nozzle segment 8b.
The present invention is not limited to the foregoing description, and can carry out various application within the scope of the appended claims.

Claims (8)

1. the curtain coater unit that is used for coating material breadth (W) (1) of a paper/board machine, this curtain coater unit (1) comprising: curtain coater (4), it is positioned at the top of material web (W), and smears (20) can supply to from this curtain coater (4) with the form of curtain shape fluid on the surface of material web (W) of impact position (21); And the tapping equipment (5 of boundary layer air (A), 3,3a), it is characterized in that, this curtain coater unit (1) comprises framing component (2), the tapping equipment (5 of this boundary layer air (A) is set by this framing component (2), 3,3a), and the tapping equipment (5 of at least a portion of this framing component (2) and this boundary layer air (A), 3, at least a portion 3a) is installed between material web (W) and this curtain coater (4), the tapping equipment (3 of this framing component (2) and this boundary layer air (A), 5,5a) form the cover body of this curtain coater (4) together.
2. curtain coater unit as claimed in claim 1 (1) is characterized in that, this framing component (2) is arranged for and supports this curtain coater (4).
3. curtain coater unit as claimed in claim 1 or 2 (1) is characterized in that, the wall of this framing component (2) is limited with space (10), and this space (10) hold at least a portion of this curtain coater (4).
4. curtain coater unit as claimed in claim 1 or 2 (1) is characterized in that, the wall part ground of this framing component (2) or fully covered by heat-insulating material.
5. curtain coater unit as claimed in claim 1 or 2 (1), it is characterized in that, be provided with the blowing device (8,8a, 8b) of support air (B), it links to each other with this framing component (2), the support air (B) that blowing device by this support air (B) (8,8a, 8b) blows on the direct of travel of material web (W), the front of this impact position (21), backing material breadth (W) non-contactly.
6. curtain coater unit as claimed in claim 1 or 2 (1), it is characterized in that, be provided with the blowing device (7,7a, 7b) of stable air (C), it links to each other with this framing component (2), stable air (C) stable curtain that is made of smears (20) in the zone of this impact position (21) that the blowing device by this stable air (C) (7,7a, 7b) blows.
7. curtain coater unit as claimed in claim 6 (1), it is characterized in that, be provided with the tapping equipment (6,6a, 6b) of stable air (C), it links to each other with this framing component (2), and the tapping equipment by this stable air (C) (6,6a, 6b) can remove stable air (C) from zone curtain, this impact position (21) that is formed by smears (20).
8. curtain coater unit as claimed in claim 4 (1), it is characterized in that this heat-insulating material is the boundary layer air (A) that moves, the support air (B) that moves, the stable air (C) that moves and/or the stable air (C) that moves in the tapping equipment of this stable air (C) (6,6a, 6b) in the blowing device of this stable air (C) (7,7a, 7b) in the blowing device of this support air (B) (8,8a, 8b) in the tapping equipment of this boundary layer air (A) (5,3,3a).
CNB2004800151241A 2003-06-26 2004-05-24 Curtain coater unit of a paper/board machine Expired - Fee Related CN100390355C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20035108 2003-06-26
FI20035108A FI115407B (en) 2003-06-26 2003-06-26 Paper / cardboard machine drawer coating unit

Publications (2)

Publication Number Publication Date
CN1802470A CN1802470A (en) 2006-07-12
CN100390355C true CN100390355C (en) 2008-05-28

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CNB2004800151241A Expired - Fee Related CN100390355C (en) 2003-06-26 2004-05-24 Curtain coater unit of a paper/board machine

Country Status (5)

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JP (1) JP4429312B2 (en)
CN (1) CN100390355C (en)
DE (1) DE112004001099B4 (en)
FI (1) FI115407B (en)
WO (1) WO2004113615A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI120982B (en) * 2005-02-25 2010-05-31 Metso Paper Inc Curtain coating method and apparatus applying this
DE102006036450A1 (en) * 2006-08-04 2008-02-07 Voith Patent Gmbh applicator
FI118926B (en) * 2007-02-15 2008-05-15 Metso Paper Inc Curtain-coating device for applying coating slip to paper-/cardboard web, has application bar, at which supply chamber extends itself in longitudinal direction of device, nozzle gap, and supply opening of supply blocks and/or supply holes
DE102007029646A1 (en) * 2007-06-26 2009-01-08 Voith Patent Gmbh Application process as well as curtain applicator
DE102016209336B4 (en) * 2016-05-30 2021-08-05 Voith Patent Gmbh Curtain applicator

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US5624715A (en) * 1994-09-27 1997-04-29 Ilford Ag Method and apparatus for curtain coating a moving support

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US5340616A (en) * 1990-08-09 1994-08-23 Fuji Photo Film., Ltd. A coating method using an electrified web and increased humidity
DE19829449A1 (en) * 1998-07-01 2000-01-05 Voith Sulzer Papiertech Patent Application device and application method
JP4113985B2 (en) * 1998-07-22 2008-07-09 富士フイルム株式会社 Application method and apparatus
DE19902404B4 (en) * 1999-01-22 2005-10-27 Agfaphoto Gmbh slide hopper
FI115295B (en) * 1999-09-01 2005-04-15 Metso Paper Inc Curtain coating device and curtain coating method

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Publication number Priority date Publication date Assignee Title
US5624715A (en) * 1994-09-27 1997-04-29 Ilford Ag Method and apparatus for curtain coating a moving support
CN1136475A (en) * 1995-02-25 1996-11-27 伊斯曼柯达公司 Curtain type coating technology and its improving method

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Also Published As

Publication number Publication date
JP2007514869A (en) 2007-06-07
CN1802470A (en) 2006-07-12
FI20035108A (en) 2004-12-27
DE112004001099T5 (en) 2006-10-26
DE112004001099B4 (en) 2013-03-28
JP4429312B2 (en) 2010-03-10
FI115407B (en) 2005-04-29
WO2004113615A1 (en) 2004-12-29
FI20035108A0 (en) 2003-06-26

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