EP2017012A2 - Machine de revêtement par rideau - Google Patents
Machine de revêtement par rideau Download PDFInfo
- Publication number
- EP2017012A2 EP2017012A2 EP08160076A EP08160076A EP2017012A2 EP 2017012 A2 EP2017012 A2 EP 2017012A2 EP 08160076 A EP08160076 A EP 08160076A EP 08160076 A EP08160076 A EP 08160076A EP 2017012 A2 EP2017012 A2 EP 2017012A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- curtain
- layer
- guide plate
- guide
- edge
- 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.)
- Ceased
Links
- 238000007766 curtain coating Methods 0.000 title abstract description 3
- 239000010410 layer Substances 0.000 claims description 90
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 239000011241 protective layer Substances 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 235000011837 pasties Nutrition 0.000 abstract 2
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 206010044625 Trichorrhexis Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Images
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
- B05C5/007—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
Definitions
- the present invention relates to a curtain coater for coating a running paper, board or other fibrous web, comprising a first curtain head for dispensing a first coating medium for a first curtain layer and a second curtain head for dispensing a second coating medium for a second curtain layer, the first curtain head upstream of the second curtain head and both curtain heads emit their curtain layers downwardly, and having an inclined guide plate which is disposed below the curtain heads and which receives the curtain layers discharged from the curtain heads and flow down along its slope, the curtain layers of a curtain guide from falling on the surface of the web to be coated (w) in the form of a curtain.
- Printing paper such as for catalogs and coated paper, which is used, among other things, for pressure-sensitive paper or thermal paper, is prepared by applying a coating to the surface of the web (base paper) with a coater and then drying it.
- Machines that perform the coating of the strokes in this way are called coaters.
- doctor blade coaters doctor blade coaters such as a round bar, or a blade or air knife machines to which the post-metering method is applied. In this first the line is applied in a more than necessary amount on the web, and then stripped with the said doctor element (metered) or blown off with an air knife.
- the painting Redispensing the problems that penetrates deep into the web by the pressing force of the doctor blade or by the liquid pressure when applying the stroke on the web of the stroke, or that the maintenance costs are high due to the wear of the doctor element.
- curtain coating machines have been used in general, in which the curtain layer is discharged from the curtain heads (chambers with nozzles) and thus the web is coated.
- Curtain coaters have long been used for photographic paper, but because of the instability of the curtain layer due to the trapping of air, bubbles trapped in the line at high speeds, or lack of mechanical accuracy, the stroke was not stable, so it was not suitable for the papermaking were used.
- the curtain coater in contrast to the conventional Nachdosiermethoden no wearing parts such as doctor blade or rods.
- the maintenance is simple, the amount of coating can be adjusted easily and with high accuracy, the operability is good and also the effect of the surface improvement for a covering coat to be applied is high. Etc.
- the web be coated with two or more layers.
- two curtain heads are placed one behind the other at the top of the moving web and the two-layer stroke is formed by letting the applied curtain down onto the top of the web.
- this curtain-type coating machine when used for paper webs, the webs are transported at a high speed of 300 to 2000 m / min, so that a large difference in speed results because the lowering speed of the curtain is about 180 m / min. In such a case, the curtain forming the lower layer arrives wet on the dry surface of the web. The friction factor between the two is relatively large. The web surface is pulled uniformly and normally, as a first layer (lower layer), a uniform coating without unevenness is formed.
- the friction factor therebetween will be low and slippage will occur.
- the surface of the coating of the first layer can not be pulled well, causing bumps. It can also happen that the coating of the second layer (upper layer) does not form normally.
- FIG. 4 shows a part of the side view of the coating device. Like in the FIG. 4 is shown, a curtain coater for two layers is provided. It has two curtain heads 1a, 1b, which output the lines ta, tb, which flow in the slits da, db, respectively directed downwards. In addition, an inclined guide plate 2 is present, which the strokes ta, tb - issued by the two
- curtain heads 1a, 1b- in each case downwardly in turn on the slope 2a slide, these lines or layers are stacked with the movement on the slope 2a of the guide plate 2 in turn and from the downward tear-off edge of the curtain guide 2b as line curtains ca, cb moved to the surface of the web w.
- a line with two layers, sa (lower layer), sb (upper layer) are formed on the surface of the transported web w.
- the arrow indicates the direction of movement of the web w.
- thermal paper is to be produced with the curtain coater described here, where two application layers are necessary, namely a heat-sensitive layer and then a protective layer
- this paper thus treated is smoothed after being coated and dried by a cloth press roller.
- the coating width of the heat-sensitive layer is narrower than the coating width of the protective layer, the heat-sensitive layer comes into direct contact with the cloth press roller, thus contaminating the roll and thus posing an obstacle to operation. Therefore, it is necessary that the width of the Protective layer is wider than the line width of the heat-sensitive layer, and that the heat-sensitive layer is completely covered by the protective layer.
- the width of the stroke ta applied by the curtain head 1a for the heat-sensitive layer stroke must be changed in accordance with the width of the web w.
- the width of the stroke ta which is output from the curtain head 1a, in accordance with the output width is a slot on both sides of the slot there, from the the dash ta flows inside the curtain head 1a, pushed in, or there is a sliding lid inserted at both ends of the slot there.
- the machine has to be stopped in order to change the slot, but the stop results in a loss of productivity, and it also means that the slot to be replaced is firmly seated and can not be removed. If a sliding lid is used, the machine does not have to be stopped, but after long use it settles down and can not be moved, so that the line emerges from the gap between the slot and lid, and it becomes technically difficult. To insert the lid, since the width of the gap is narrow at 0.3 to 0.5 mm.
- the invention is therefore based on the object of specifying a curtain coater in which the disadvantages of the prior art do not occur.
- the object is achieved with the characterizing features of claim 1 such that a device for adjusting the Application width is provided for the first curtain layer arranged to be below the first curtain head for the first layer and associated with the lateral upper portion of the guide plate such that a central portion of the first curtain layer dispensed from the curtain head of FIG lateral parts of the same layer is separable, whereby the middle part slides down on the surface of the guide plate and the lateral parts flow in the opposite direction as the flow of the middle part.
- the width of this line dispensed from the curtain head for that layer need not change but is output across the entire width and into a middle one after dispensing Split part and part at both ends. The middle part then gets on the track, whereas the two side parts are collected.
- the technical difficulties in the case of changing widths of the bar, which is released from the curtain head for the first layer are solved.
- retraction (narrowing of the width with simultaneous increase in thickness by this proportion), which occurs at the edges of the line due to surface tension of the application medium, is avoided.
- the effect and operation of the present invention are as follows.
- the stroke of the first applied application medium which is output from the upstream curtain head downwards over the entire width, by a pair of device for adjusting the stroke width, which are provided directed downward, in a middle part and in a part at both Split ends. That is, the part meets on both sides of this first layer (on the web the lower layer) on the partition plate, which has a gradient opposite to the guide plate, flows on the partition plate in the opposite direction downwards and is collected by the ink pan.
- the middle part which exits as it flows downward impinges on the guide plate near the upper edge and flows along the slope thereof and moves from the lower edge of the downwardly directed curtain guide to the surface of the web as a curtain ,
- the impact position of the slash of the second applied sliver layer discharged from the second curtain head may occur.
- the guide plate only slightly (eg, 1 to 2 mm) of the lower edge of the edge guide is downstream of the guide plate so that the flow of the first layer stroke on the guide plate slope is restricted by the guide plate and the second stroke flow. This is done at the time it decides whether or not it will pull in, so there is no catchment in the flow of the first layer.
- both ends of the flow of the stroke of the second Although there may be layers of edge thickening on the surface of the web, they can be cut off by a knife and no problems are caused.
- the point of impact of the second layer emitted by the second curtain head may also be somewhat upstream (e.g., about 1 to 2 mm) from the lower edge of the edge guide on the guide plate on the guide plate. In this case, under no circumstances does the problem of drawing in the flow of the first stroke occur.
- the stroke for the first layer is outputted over the entire width, divided into a middle part and a part at both ends after dispensing, the middle part is applied to the web, and the part at both ends is collected.
- the present invention is particularly suitable for the production of Thermal paper.
- a heat-sensitive layer is applied by means of the first curtain head. This is the surface of the web completely covered by the second applied layer, the protective layer, on the whole width. This is true even if the width of the protective line output from the curtain head for the protective layer is larger than the largest width between the areas on the inside of the bar width adjusting device.
- 1a denotes the curtain head for a first coating medium ta for a first layer ca, i. for a heat-sensitive layer sb.
- the curtain head 1a is arranged upstream of a second curtain head 1b for a second application medium tb or for a second layer cb or for a protective layer sb.
- Denoted by 2 is a guide plate which receives the media originating from these curtain heads 1a, 1b on their bevel 2a and allows them to flow down along the bevels 2a. From a downwardly directed lower edge (tear-off edge) of the curtain guide 2b, the media ta, tb reach the surface of the web w as a falling line curtain c.
- the upper edge of the guide plate 2 has a bent portion 2c with a gradient which is reversed to the slope 2a along which the bar to be applied flows.
- the Device 9 is disposed below the curtain head 1 a for the heat-sensitive layer and is arranged symmetrically to the surfaces (vertical surfaces including the center line c1 of the coating machine) at the two ends of the upstream guide plate 2, the position of which is adjustable in width and the surface of a to the gradient of the guide plate 2 has opposite gradient on which the middle part tac of the stroke ta of the heat-sensitive layer discharged from the curtain head 1a for the heat-sensitive layer on the guide plate 2 flows, and on which the part of both ends tae of first coating medium ta of the heat-sensitive layer, which is discharged from the curtain head 1a for the heat-sensitive layer on the guide plate 2 and flows on the surface thereof in the direction opposite to the flow on the guide plate 2.
- the bar width setting device 9 has a pair of edge guides 3 extending downward from the upper edge of the guide plate 2, parallel to the inner surface, and also parallel to the center line c1 of the coating machine.
- the edge guides 3 bear against the surface of the guide plate 2 and are pointed at their lower edge.
- a parallel pair of auxiliary guides 4 is provided, which are fixedly mounted in the region of the upper edges of the edge guides 3 of the relevant plate and which are seen from the outside wedge-shaped. Their surface has a gradient which is opposite to the gradient of the guide plate 2.
- a parallel pair of partition plates 5 are provided, which are fixedly mounted on the surface of the respective auxiliary guides 4 and whose surface has a gradient which is the same as the gradient of Surface of the auxiliary guides 4. In the area of the lower edge 3a of the edge guides 3 on the guide plate whose thickness is reduced, as in Figure. 1 and 2 is shown.
- the partition plate 5 is as shown in the figures bent at the edge downwards.
- the surfaces of the inner sides of the edge guides 3 on the guide plate, the surfaces of the inner sides of the auxiliary guides 4 and the surfaces of the inner sides of the partition plate 5 form, as in FIG. 1 and 2 represented, a uniform vertical guide surface 9a.
- the stroke tae flowing on the partitioning plate 5 of the bar width adjusting device 9 is collected by the ink fountain 7.
- the positioning device 6 denotes a device for positioning. With this device 6, the adjustment of the position of the device 9 for adjusting the stroke width is made in the transverse direction.
- the positioning device 6 consists of bolts 6a which are rotatably mounted on the side surfaces of the outsides of the edge guides 3 on the plate and consists of nut members 6b which are positively connected to the respective bolts 6a and at the same time fixedly mounted on the end surfaces of the guide plate 2 are.
- the width of the coating medium tb discharged from the curtain layer head 1b for the protective layer is larger than the largest width between the surfaces 9a of the inner surfaces of the bar width adjusting device 9.
- Designated at 8 is a pair of edge guides parallel to each other, which are provided to guide the part of the curtain c which extends from the curtain guide 2b to the web w.
- another guide surface is present, the one Constriction of the curtain c prevented.
- the line ta of the heat-sensitive layer which is discharged from the curtain-side head 1a for the heat-sensitive layer downwards over the entire width, is divided into a middle part tac and a unit by the bar width adjusting device 9 arranged below Part tae divided for both sides. That the part tae for both sides of the discharged medium ta of the heat-sensitive layer strikes the partition plate 5 which has a gradient opposite to the guide plate 2, flows downward on the partition plate 5 and is caught by the ink pan 7.
- the middle part tac of the discharged stroke ta is directed downward as it is, hits in the region of the upper edge of the guide plate 2, flows down along its slope 2a, and moves from the downwardly facing curtain guide 2b to the line curtain c Surface of the railway w.
- the area of the inside of the edge guide 3 on the plate of the device for setting the stroke width the area of the inside of the
- Auxiliary guide 4 and the surfaces of the inside of the partition plate 5 a uniform vertical guide surface 9a, so that the side surfaces of the central part tac is guided by this vertical guide surface 9a and so arrives on the slope 2a of the guide plate 2.
- the flow of the stroke tac of the heat-sensitive layer is passed through the surface of the inside of the edge guide 3 on the plate. Consequently, up to the lower edge 3a of the edge guide 3 on the plate no retraction caused.
- the heat-sensitive layer sa on the surface of the web w is completely covered completely by the protective layer sb (even if the width of the stroke tb output from the protective-layer curtain head 1b is larger than the largest width between the surfaces 9a on the inside of the device for adjusting the line width 9), there is no direct contact of the heat-sensitive layer sa with a cloth press roller present in the manufacture of the thermal paper web and thus the problem of contamination of the roller surface does not occur.
- the present invention is not limited to the configuration in the above-described embodiment, but it may be changed. as long as the main contents of the invention are not violated.
- a combination of bolts 6a and nut member 6b for the positioning device 6 has been described, but for example, a combination with a rack or a linear motor may also be used.
Landscapes
- Coating Apparatus (AREA)
- Paper (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007189596A JP5228226B2 (ja) | 2007-07-20 | 2007-07-20 | 感熱紙の製造装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2017012A2 true EP2017012A2 (fr) | 2009-01-21 |
| EP2017012A3 EP2017012A3 (fr) | 2009-02-25 |
Family
ID=39846622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08160076A Ceased EP2017012A3 (fr) | 2007-07-20 | 2008-07-10 | Machine de revêtement par rideau |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2017012A3 (fr) |
| JP (1) | JP5228226B2 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2157240A3 (fr) * | 2008-08-21 | 2010-11-24 | Voith Patent GmbH | Dispositif d'application de rideau |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5338427B2 (ja) * | 2009-03-30 | 2013-11-13 | 王子ホールディングス株式会社 | カーテン塗工装置 |
| JP7093600B2 (ja) * | 2020-11-06 | 2022-06-30 | 大阪シーリング印刷株式会社 | 感熱記録体 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006249611A (ja) | 2005-03-10 | 2006-09-21 | Toray Ind Inc | 難燃性に優れた布帛物およびその製造方法 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2351369C2 (de) * | 1973-10-12 | 1983-05-11 | CIBA-GEIGY AG, 4002 Basel | Beschichtungsvorrichtung |
| US4559896A (en) * | 1983-09-15 | 1985-12-24 | Ciba Geigy Corporation | Coating apparatus |
| JP2782531B2 (ja) * | 1989-06-19 | 1998-08-06 | 富士写真フイルム株式会社 | カーテン塗布の塗布巾変更装置 |
| EP0520091B1 (fr) * | 1991-06-18 | 1995-12-13 | Agfa-Gevaert N.V. | Enduiseuse à rideau |
| JP3193075B2 (ja) * | 1991-07-05 | 2001-07-30 | 三菱製紙株式会社 | 塗被紙の製造方法 |
| JPH07171467A (ja) * | 1991-09-02 | 1995-07-11 | Fuji Photo Film Co Ltd | 塗布方法及び装置 |
| JP2584923Y2 (ja) * | 1992-04-17 | 1998-11-11 | 石川島播磨重工業株式会社 | 塗工装置 |
| US5683750A (en) * | 1996-07-30 | 1997-11-04 | Eastman Kodak Company | High speed coating starts for multiple layer coatings using a temporary top coat |
| JP3621204B2 (ja) * | 1996-08-20 | 2005-02-16 | 三菱製紙株式会社 | カーテン塗布装置及び塗布方法 |
| DE19735588A1 (de) * | 1997-04-21 | 1999-02-18 | Jagenberg Papiertech Gmbh | Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn |
| DE10316999A1 (de) * | 2003-04-11 | 2004-10-28 | Bachofen & Meier Ag | Vorrichtung zum Beschichten einer laufenden Materialbahn |
| DE10320146A1 (de) * | 2003-05-06 | 2004-11-25 | Voith Paper Patent Gmbh | Mehrschicht-Auftragsvorrichtung zum Auftragen von Auftragsmedium im Wege wenigstens eines mehrschichtigen Vorhangs oder Schleiers |
| JP2006055703A (ja) * | 2004-08-18 | 2006-03-02 | Mitsubishi Paper Mills Ltd | カーテン塗布装置及びカーテン塗布方法 |
| JP4746894B2 (ja) * | 2005-03-14 | 2011-08-10 | ボイス ペ−パ− パテント ゲ−エムベ−ハ− | 塗工装置 |
| DE102005035317A1 (de) * | 2005-07-28 | 2007-02-01 | Voith Patent Gmbh | Auftragsverfahren |
| JP5239008B2 (ja) * | 2007-07-13 | 2013-07-17 | ボイス パテント ゲーエムベーハー | 塗工機の塗工幅調整装置 |
-
2007
- 2007-07-20 JP JP2007189596A patent/JP5228226B2/ja not_active Expired - Fee Related
-
2008
- 2008-07-10 EP EP08160076A patent/EP2017012A3/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006249611A (ja) | 2005-03-10 | 2006-09-21 | Toray Ind Inc | 難燃性に優れた布帛物およびその製造方法 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2157240A3 (fr) * | 2008-08-21 | 2010-11-24 | Voith Patent GmbH | Dispositif d'application de rideau |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5228226B2 (ja) | 2013-07-03 |
| EP2017012A3 (fr) | 2009-02-25 |
| JP2009023250A (ja) | 2009-02-05 |
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