CN103080421A - Curtain applicator - Google Patents
Curtain applicator Download PDFInfo
- Publication number
- CN103080421A CN103080421A CN2011800361998A CN201180036199A CN103080421A CN 103080421 A CN103080421 A CN 103080421A CN 2011800361998 A CN2011800361998 A CN 2011800361998A CN 201180036199 A CN201180036199 A CN 201180036199A CN 103080421 A CN103080421 A CN 103080421A
- Authority
- CN
- China
- Prior art keywords
- coating agent
- opening
- filter
- heavy curtain
- application head
- 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.)
- Granted
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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
- D21H23/46—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
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/40—Filters located upstream of the spraying outlets
-
- 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
-
- 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
Abstract
The invention relates to a curtain applicator (1, 1a, 1b) for coating a moving paper, cardboard or other fibrous material web (2) with at least one liquid to paste-like application medium (3, 3a, 3b to 3n), comprising a machine-wide application head (4, 4a, 4b), which is arranged above the fibrous material web (2) and at a distance therefrom and has at least one application medium chamber (7, 7a, 7b), into each of which at least one opening (8, 8' to 8''', 8b to 8n) for the respective supplied application medium (3, 3a, 3b to 3n) opens, wherein the application head (4, 4a, 4b) delivers the at least one application medium (3, 3a, 3b to 3n) in the form of a free-falling curtain (9, 9a, 9b) onto the fibrous material web (2), and wherein the application head (4, 4a, 4b) or the opening (8, 8' to 8''', 8b to 8n) is connected to at least one application medium supply line (10), into which various means (11) for collecting or buffer-storing, ventilating, filtering, temperature-controlling, quantity-regulating and the like are incorporated. According to the invention, at least one filter (13, 13', 13'', 13''') is provided for the application medium (3, 3a, 3b to 3n), said filter being directly connected to the opening (8, 8', 8'', 8''', 8b to 8n).
Description
Technical field
The present invention relates to a kind of for at least a liquid state to the coating agent of paste to operating paper web, paperboard web or other fibrous material webs are carried out the heavy curtain applicator of coating, it is included in the wide application head of the machine with at least one coating agent chamber of fibrous material web top and layout with interval, each at least one opening for relevant coating agent leads to this coating agent chamber, wherein, application head is released at least a coating agent on the fibrous material web with the heavy curtain form of free-falling, and wherein, application head or opening are connected with at least one coating agent transfer pipeline, are used for assembling or buffering, exhaust, filter, temperature adjustment, the distinct device of accent amount etc. is attached in this coating agent transfer pipeline.
Background technology
In the heavy curtain application device, really omitted dosing mechanism because do not exist excessive.That is to say, only apply the amount that finally should be retained on the matrix in the heavy curtain application device.Therefore, must pump the amount of coating agent in the heavy curtain applicator very little.The heavy curtain application device also needs to carry out exhaust to smearing pigment, because the heavy curtain that produces and emit by applicator is very responsive, and because gas (air) content has just caused problem in the preparatory stage of actual coating.In addition, be necessary that in the heavy curtain applicator to want keeping system clean.Especially in changing, coating agent needs harsh and expensive cleaning.
Smear in the unit at all, thus also in the heavy curtain application device, coating agent, the pigment of smearing that especially contains particle are filtered in feed system subtly.This is very important, has existing about 0.2 to 0.4mm little gap length because usually emit nozzle.The part of nozzle is stopped up (being called as so-called embolism forms) and especially have bad consequence in the heavy curtain applicator.That is to say, the injection shunting of shrinking at the heavy curtain edge occurred having.This edge has caused on the fibrous material web exceeding many times applying amount with respect to rated value, and the initial stage also can be dry after a while for this applying amount.Aftermath is, for the manufacture of and/or the roller of following successively of smearing the machine intimate of fibrous material web serious pigment occurred and piled up, therefore need too high cleaning cost.In addition, exist the fibrous material web high tear risk, and also have extraly for example risk of the plastics roller in calender or rubber rollers damage of picture.Also may produce bonding on roller of fibrous material web layer, and cause too high rejection number.
Although carried out meticulous filtration, the local obstruction may appear, because be furnished with flexible pipe and pipeline between the valve that for example is used for flushing or bypass guiding and filter.There can be in dead band, transition part and convex shoulder etc. build up everywhere and packed particle, these particles are in service at the heavy curtain applicator then, especially forms embolism (that is to say local the obstruction) in situation about resetting.
Summary of the invention
Therefore, task of the present invention is, a kind of heavy curtain applicator is provided, and avoided local obstruction in this heavy curtain applicator.
Task of the present invention utilizes the feature of claim 1 to solve.Arranged according to the present invention as follows, that is, for separately coating agent is provided with at least one filter, wherein, filter directly is connected with the opening in coating agent chamber.
This solves in the following way, that is, filter is directly installed on before the opening of chamber, or is integrated at least one opening.Filter is so-called " alert formula filter (Polizeifilter) ", is somebody's turn to do " alert formula filter " as the last element before leading to the opening in coating agent chamber, or is present in this opening.Different from existing heavy curtain applicator, directly before opening, no longer there are valve, branch road, flexible pipe or similar element.Avoided reliably local obstruction.
Other advantages are the cleaning time of the shortening of applicator, low cost, coating runnability and the quality of improvement.
The structure of filter depends on quantity and the layout of opening or nozzle inlet.What can meet purpose so under a stable condition is, when only having an opening and thus only during a single filter.In this enforcement, opening and filter can be arranged in one of them of application head distolateral on, that is to say, be arranged on the driving side or be arranged on the guiding side of machine.This enforcement is particularly useful for so-called seam type nozzle (flute profile die head, Slot Die) and less machine-wide.Opening and thus filter also can be arranged in alternatively the wide application head of machine roughly in the middle of.This enforcement especially is considered for so-called sliding layer nozzle or tandem type nozzle (slippage die head, Slide Die) and less machine-wide.
Yet following enforcement also is feasible, and there are a plurality of openings in each coating agent chamber and have thus a plurality of filters in this enforcement.In the case, opening can be arranged in two of application head distolateral on, that is to say, be arranged on the guiding side and driving side of machine.This enforcement is selected to the seam type nozzle (slot type die head) of larger machine-wide.
Optional enforcement also is, is furnished with a plurality of openings at the width of application head with distributing.This enforcement especially is considered for so-called sliding layer nozzle or tandem type nozzle (slippage die head) and larger machine-wide.
When filter possessed the tapered filter core of the little mesh width that has between 0.1 to 0.4mm, its work was especially effective.The mesh width roughly with the width of die gap coupling.Thus, the coating agent that is applied to the heavy curtain coating is directly filtered before coating very subtly, and no longer worries to stop up.
Also can in existing pigment feed system, replenish the structure of pack into a filter or a plurality of filters as described.The present invention can not only be applied to the heavy curtain applicator that individual layer (single layer) applies, and also can be applied to the heavy curtain applicator that multilayer (multilayer) applies.Under the applicable cases of in the end mentioning, thus for each a kind of coating agent or each a kind of color or each layer use filter smeared.As described, not only seam type nozzle (slot type die head) but also sliding layer nozzle (slippage die head) all are considered as the heavy curtain applicator.
What need to replenish is that on distolateral, application head can be connected with at least one bypass conduit.
In tandem type nozzle or sliding layer nozzle (slippage die head), can arrange two pieces, that is to say that one on the guiding side of machine and on driving side at machine, and bypass that only need to be on the guiding side in seam type nozzle (slot type die head).
The component of the less of the coating agent that flows out via one or more discharge lines can be flowed to coating agent preparation section again according to the difference of the mode of advancing.This component is then with new coating agent at least one transfer pipeline that backflows.
In addition, in the seam type nozzle, also be provided with the upwards gas exhaust piping of fork.Wherein, usually there are a plurality of gas exhaust pipings that distribute in machine-wide.
Description of drawings
The present invention will be described in detail below in conjunction with embodiment.In the diagram:
Fig. 1 illustrates according to the schematic diagram of heavy curtain applicator of the present invention on the machine longitudinal direction;
Fig. 2 is illustrated in the application head of the heavy curtain applicator of seeing on the transverse machine, with the diagram to the layout of filter;
Fig. 3 is illustrated in the frame mode that the application head of seeing the heavy curtain applicator on the transverse machine changes with respect to Fig. 2;
Fig. 4 illustrates the first scheme according to the layout of filter of the present invention;
Fig. 5 illustrates the alternative plan according to the layout of filter of the present invention.
The specific embodiment
Shown in the example of Fig. 1 as fibrous material device for producing material web device or smear the heavy curtain applicator 1 of the part of machine.Heavy curtain applicator 1 is used for carrying out coating with liquid state to 3 pairs of operating paper webs of coating agent, paperboard web or other fibrous material webs 2 of paste, in order to beautify or to improve its printing performance.
Heavy curtain applicator 1 is included in the wide application head 4 of machine of fibrous material web 2 tops and layout with interval, its have built-in, same on width from left end side 5 until the coating agent chamber 7 that right-hand member side 6 is extended.The opening or the nozzle inlet 8 that are used for coating agent 3 lead to chamber 7.In this example, opening 8 arranges that this left end side is positioned on the driving side TS of machine on the left end side 5 shown in the figure.Application head 4 is released to coating agent 3 on the fibrous material web 2 with heavy curtain 9 forms of free-falling.On the one hand, opening 8 is connected with following coating agent transfer pipeline 10, and the different equipment that is used for gathering or buffering, exhaust, filtration, temperature adjustment, accent amount etc. is attached to this coating agent transfer pipeline, in order to simplify accompanying drawing these equipment is marked with mark 11.In addition, application head 4 is provided with bypass conduit 12, is used for deriving coating agent 3.
Although before heavy curtain applies, implemented meticulous filtration; in with 11 equipment of indicating; that is to say; between the valve and filter that for example are used for flushing or bypass guiding; particle still may be built up in transition part, convex shoulder and dead band in flexible pipe and pipeline and be piled up; these particles are in service at heavy curtain applicator 1 then, especially in situation about resetting, formed local obstruction.This situation can be avoided in the following way, that is: directly before at least one opening or nozzle inlet 8 or filter 13 is installed therein.Filter 13 is used for so-called " alert formula filter ", the last element of this alert formula filter arrangement conduct before leading to the opening 8 in coating agent chamber 7, and be embodied directly in before the nozzle inlet.Only clearly show that in the example shown in Fig. 1 that one is used for the feed openings 8 in existing coating agent chamber 7 and filter 13 only thus.With dashed lines illustrates, opening 8 ' and thus on filter 13 ' also can be arranged in alternatively this right-hand member side 6 or the guiding side FS, or can be arranged in alternatively this wide application head of machine 4 roughly in the middle of (with 8 " with 13 " mark), or also can be arranged on guiding side and the driving side, or also can on the width of application head 4, arrange evenly distributedly (" ' with 13 " ' mark with 8).
For the sake of completeness, in Fig. 1, except the gas exhaust piping 15 of existing upwards fork and disabling mechanism 16, also show for (the outboard mode of advancing outside the width B of fibrous material web 2, the medium edge part of overboard-Fahrweise) emitting or the feeder 17 of heavy curtain marginal portion 18, these marginal portions are directed to the pigment preparation process by discharge line 19 or import in the loop of medium transport 10.Not shown initial-stop slot.
Yet, also show other bypass conduit 1 on guiding side FS, this bypass conduit in example distolateral fork and equally stretching, extension until feeder 17.
Figure 2 illustrates at cross-machine direction or the width application head 4a with the heavy curtain applicator 1a of seam type nozzle (slot type die head) form.Illustrate the layout of filter 13a, this filter is basically coaxial with coating agent chamber 7a.Also illustrate the jet expansion slit 20 of the seam type nozzle of application head 4a, this jet expansion slit has the gap length w between 0.2 to 0.4mm, and heavy curtain 9a falls on the matrix for the treatment of coating from this jet expansion slit or falls on the fibrous material web 2 that direction L moves, and produces there coat or so-called outline line 21.
Fig. 3 shows the application head 4b of the heavy curtain applicator 1b that changes with respect to Fig. 2.Application head 4b is called as sliding layer nozzle or tandem type nozzle.Application head 4b has the coating agent chamber 7b to 7n of oneself in principle for every kind of coating agent 3b to 3n, these coating agent chambeies are transited into respectively the charging slit with corresponding outlet nozzle slit 20b to 20n.Outlet nozzle slit 20b to 20n diverges from coating agent chamber 7b, 7n respectively, and ends on the surface 22 of the application head 4b that is configured to the sliding layer nozzle.The heavy curtain 9a of the single or multiple lift that flows out produces respectively the coating agent layer with the desired corresponding single or multiple lift of coat quantity after this here on the unshowned fibrous material web.
In this is implemented, depend on desired coat quantity, for each coating agent chamber 7b to 7n, that is to say, every kind of coating agent is for each coat, have each opening 8a to 8n and have thus the filter 13b to 13n of respective numbers, the reason for general view among distolateral Fig. 3 of being arranged in of these openings and filter is illustrated with putting respectively.
It can also be seen that in Fig. 3 how single coating agent 3b to 3n stacks each other on surface 22, and these layers S how as multilayer heavy curtain 9b basically owing to gravity falls.
What need to replenish is, the opening 8 of in Fig. 1, setting forth ', 8 ", 8 " ' with filter 13 ', 13 ", 13 " ' same feasible optional layout also be applicable in the enforcement shown in Fig. 2 and Fig. 3.
In Fig. 4, should show and directly before the opening 7 in coating agent chamber 7, arrange filter 13.This figure also be applicable to similarly opening 8 ', 8 ", 8 " ' and filter 13 ', 13 ", 13 " '.
Fig. 5 shows filter 13 in opening 8 or passes the feasible layout that opening 8 stretches.This figure also be applicable to equally similarly opening 8 ', 8 ", 8 " ' and filter 13 ', 13 ", 13 " '.
Reference numerals list
Claims (7)
1. be used for liquid at least a coating agent (3 to paste, 3a, 3b to 3n) to operating paper web, paperboard web or other fibrous material webs (2) are carried out the heavy curtain applicator (1 of coating, 1a, 1b), it is included in described fibrous material web (2) top and spaced apart with at least one coating agent chamber (7 with described fibrous material web, 7a, the application head (4 that machine 7b) is wide, 4a, 4b), respectively be useful on the relevant coating agent that is transferred (3,3a, 3b to 3n) at least one opening (8,8 ' to 8 " '; 8b to 8n) lead in the described coating agent chamber; wherein; described application head (4; 4a; 4b) with the heavy curtain (9 of free-falling, 9a, 9b) form is with described at least a coating agent (3,3a, 3b to 3n) is released on the described fibrous material web (2), and wherein, described application head (4,4a, 4b) or described opening (8,8 ' to 8 " '; 8b to 8n) be connected with at least one coating agent transfer pipeline (10); be used for assembling or buffering; exhaust; filter; temperature adjustment, the different equipment (11) of accent amount etc. is attached in the described coating agent transfer pipeline, it is characterized in that, be described coating agent (3,3a, 3b to 3n) is provided with at least one filter (13,13 ', 13 "; 13 " '), the direct and described opening (8 of described filter, 8 ', 8 "; 8 " ', 8b to 8n) connects.
2. heavy curtain applicator according to claim 1 (1), it is characterized in that, described filter (13,13 ', 13 ", 13 " ') be directly installed on described opening (8,8 ', 8 ", 8 " ', 8b to 8n) before, or be integrated in described at least one opening (8,8 ', 8 ", 8 " ', 8b to 8n) in.
3. heavy curtain applicator according to claim 1 and 2 (1) is characterized in that, described opening (8,8 ') is arranged on one of them distolateral (5 or 6) in described application head (4) or described at least one coating agent chamber (7).
4. described heavy curtain applicator (1) according to claim 1 and 2 is characterized in that, described opening (8 ") be arranged in the wide application head of described machine (4) or described at least one coating agent chamber (7) roughly in the middle of.
5. heavy curtain applicator according to claim 1 and 2 (1) is characterized in that, is furnished with respectively described opening (8,8 ') on two distolateral (5,6) in described application head (4) or described at least one coating agent chamber (7).
6. heavy curtain applicator according to claim 1 and 2 (1) is characterized in that, is furnished with a plurality of openings (8 " ') at the width in described application head (4) or described at least one coating agent chamber (7) with distributing.
7. according at least one described heavy curtain applicator (1) in the claims, it is characterized in that, described filter (13,13 ', 13 ', 13 ", 13 " ') possess the tapered filter core (14) of the mesh width (Mw) that has between 0.1 to 0.4mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010031558A DE102010031558A1 (en) | 2010-07-20 | 2010-07-20 | Curtain applicator |
| DE102010031558.3 | 2010-07-20 | ||
| PCT/EP2011/062138 WO2012010511A1 (en) | 2010-07-20 | 2011-07-15 | Curtain applicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103080421A true CN103080421A (en) | 2013-05-01 |
| CN103080421B CN103080421B (en) | 2016-06-29 |
Family
ID=44512826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180036199.8A Active CN103080421B (en) | 2010-07-20 | 2011-07-15 | Curtain applicator |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2596171B1 (en) |
| CN (1) | CN103080421B (en) |
| DE (1) | DE102010031558A1 (en) |
| WO (1) | WO2012010511A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202012104933U1 (en) * | 2012-12-18 | 2013-01-14 | Metso Paper, Inc. | Apparatus for coating a fibrous web |
| CN110997158A (en) | 2017-08-02 | 2020-04-10 | 福伊特专利有限公司 | Method for coating a material web |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533418A2 (en) * | 2003-11-12 | 2005-05-25 | Voith Paper Patent GmbH | Coating apparatus |
| CN101245570A (en) * | 2007-02-15 | 2008-08-20 | 美卓造纸机械公司 | Pattern coater for paper/paper sheet breadth |
| WO2009000715A1 (en) * | 2007-06-26 | 2008-12-31 | Voith Patent Gmbh | Application method and curtain applicator unit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5792317A (en) * | 1996-02-07 | 1998-08-11 | Gl&V-Paper Machine Group, Inc. | Wet end starch application |
| DE10032430A1 (en) * | 2000-07-04 | 2002-01-17 | Voith Paper Patent Gmbh | Curtain coating applicator for a moving web has an air extraction unit in the moving coating curtain path for effective removal of micro air bubbles for a consistent surface cover at high web speeds and large web widths |
| DE20321832U1 (en) * | 2003-09-16 | 2010-12-30 | Voith Patent Gmbh | Device for coating color preparation |
| DE102008000122A1 (en) * | 2007-02-24 | 2008-08-28 | Voith Patent Gmbh | System to monitor coating medium flow, at a web curtain coating applicator, uses acoustic waves to detect a local parameter deviation to activate a jet cleaning unit |
| DE102008000451A1 (en) * | 2008-02-29 | 2009-09-03 | Voith Patent Gmbh | coating station |
| DE102008040403A1 (en) * | 2008-07-15 | 2010-01-21 | Voith Patent Gmbh | Curtain applicator |
| EP2145693A1 (en) * | 2008-07-16 | 2010-01-20 | Voith Patent GmbH | Monitoring of a coating agent flow when being applied to a paper, cardboard or other fibre sheet lengths |
-
2010
- 2010-07-20 DE DE102010031558A patent/DE102010031558A1/en not_active Withdrawn
-
2011
- 2011-07-15 CN CN201180036199.8A patent/CN103080421B/en active Active
- 2011-07-15 WO PCT/EP2011/062138 patent/WO2012010511A1/en active Application Filing
- 2011-07-15 EP EP11732465.7A patent/EP2596171B1/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1533418A2 (en) * | 2003-11-12 | 2005-05-25 | Voith Paper Patent GmbH | Coating apparatus |
| CN101245570A (en) * | 2007-02-15 | 2008-08-20 | 美卓造纸机械公司 | Pattern coater for paper/paper sheet breadth |
| WO2009000715A1 (en) * | 2007-06-26 | 2008-12-31 | Voith Patent Gmbh | Application method and curtain applicator unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103080421B (en) | 2016-06-29 |
| DE102010031558A1 (en) | 2012-01-26 |
| WO2012010511A1 (en) | 2012-01-26 |
| EP2596171B1 (en) | 2015-01-21 |
| EP2596171A1 (en) | 2013-05-29 |
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