EP2032760A1 - Vorrichtung zur beschichtung einer laufenden papier-, karton- oder anderen faserstoffbahn - Google Patents
Vorrichtung zur beschichtung einer laufenden papier-, karton- oder anderen faserstoffbahnInfo
- Publication number
- EP2032760A1 EP2032760A1 EP07728729A EP07728729A EP2032760A1 EP 2032760 A1 EP2032760 A1 EP 2032760A1 EP 07728729 A EP07728729 A EP 07728729A EP 07728729 A EP07728729 A EP 07728729A EP 2032760 A1 EP2032760 A1 EP 2032760A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide element
- fibrous web
- web
- fibrous
- 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.)
- Withdrawn
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 27
- 239000011248 coating agent Substances 0.000 title claims abstract description 23
- 239000000123 paper Substances 0.000 title claims abstract description 7
- 239000011111 cardboard Substances 0.000 title claims abstract description 6
- 239000002657 fibrous material Substances 0.000 title abstract 6
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 235000011837 pasties Nutrition 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
Definitions
- the invention relates to a device for coating a running paper, cardboard or other fibrous web during its manufacture and / or finishing, with an application unit which is arranged at a distance from the fibrous web and which provides a liquid to pasty application medium provided for coating on the fibrous web emits, and with at least one associated and / or downstream guide element for guiding the fibrous web.
- curtain and spray application works A curtain application can be found in DE-A1 197 55 625. It creates a closed curtain that essentially follows gravity and extends across the entire width of the fibrous web.
- a spray applicator which emits a large number of spray jets extending under the width of the fibrous web under pressure, is known from EP-A2 0881330.
- the fibrous web is supported and guided by guide elements during the coating processes described.
- the guide elements are usually designed as rotating guide rollers which are longer than the fibrous web is wide.
- the coating takes place either in the area between two such guide elements or directly above such a guide element.
- the fibrous web is also coated with coating medium in the region of its web edges (on the front side and on the underside of the web), in particular when splitting an application medium curtain of a curtain application unit.
- These "color” deposits are transferred to the surface of the broader or protruding guide element below the web edge, so that during the ongoing coating process the edge region of the fibrous web is inadvertently also “coated from below” as it were. This state is shown in FIG. 1
- the "color” excess that is now present in the edge of the web does not completely dry the web here. This also contaminates the guide elements in the subsequent sections of the web production machine. This can even go beyond the drying that follows the coating process to a reel where the finished web is rolled up and there leads to very disadvantageous adhesion of the web edges.
- the at least one of the leadership and support of the The fibrous web-serving guide element is designed in such a way that its surface does not touch the running fibrous web in the region of its two web edges.
- This configuration ensures that neither the guide elements assigned to and / or also subordinate to the application work cannot get dirty.
- the guide element according to the invention is very advantageously designed as a rotating guide roller and provided with a roller cover.
- An elastomeric layer in particular consisting of rubber, is preferably used as the roll cover.
- a hard chrome layer is also possible.
- the object of the invention can be achieved in a particularly simple manner in that the guide element has a smaller diameter at its two edge regions than in its remaining region, that is to say its central region. It is considered sufficient if the diameter is about 10mm smaller. This can be achieved by simply using the reference strength, i.e. the roll cover is smaller at the ends of the guide element or the roll radius in the edge area is chosen to be correspondingly smaller.
- the guide element is set back at its two edge regions in the axial direction by an amount x of up to 400 mm, i.e. has the smaller diameter over the partial length x.
- the guide element has at least one additional zone with a smaller diameter or a lower roll cover thickness than in its other area on its two edge areas. This means that the same type of guide element can be used universally for different web formats. It is therefore not necessary to produce a large number of different guide element types. In addition, the machine does not have to be converted every time the format is changed, which saves enormous time and costs.
- a very expedient adaptation to the respective web width can also be accomplished by attaching a segment part serving for the desired extension of the guide element to at least one lateral end of a guide element.
- This add-on or segment part is designed to be rotatable, but does not rotate during operation with the guide element or guide rollers. Continuous adjustment is possible.
- the use of the guide element according to the invention is preferably assigned to and / or arranged after a known curtain applicator.
- This curtain applicator delivers an application medium, in particular pigment-containing coating color in the form of a curtain that essentially follows gravity and / or is guided and closed under the influence of electrostatic forces or a multiple curtain - but without excess medium - to the fibrous web, which is in the area of the Commissioned work and then guided and supported over at least one guide element according to the invention. It is also useful in a spray applicator, where the spray applicator delivers the application medium to the fibrous web in the form of individual or a large number of spray jets.
- Figure 1 a schematic representation of the prior art on
- FIGS. 2 to 8b a schematic representation of various embodiments of the guide element according to the invention
- Figures 9 to 11 a schematic representation of various arrangements of guide elements designed according to the invention within a machine for producing the fibrous web
- the same components or elements are provided with the same reference symbols in the figures.
- FIG. 1 shows a device 1 according to the prior art, with which a fibrous web 2 made of paper or cardboard is coated. It can be seen that an application medium 3 is applied directly to the fibrous web 2 as an application layer 4. It is also shown that the application medium 3 is delivered in the form of a curtain 5 falling vertically onto the fibrous web 2 with a non-contact curtain application unit 6 (because this is the main form of application). The application unit 6 is arranged above the fibrous web 2. Its distance is adjustable so that the curtain height h is between 50 and 500mm, but mostly between 150 and 220mm.
- the application medium 3, also referred to as coating or coating medium, is coating color in the example. The coating color consists of a mixture of mineral pigments, natural or synthetic binders and chemical additives.
- the fibrous web 2 runs during its production and finishing by means of the previously described coating in the direction of travel R for the purpose of guiding and supporting the web 2 via at least one guide element 7 assigned to the application unit 6 and / or via at least one downstream guide element 7.
- the fibrous web 2 is also in the area of its web edges 2a and 2b, both on the end face 2c and on the underside 2d
- FIGS. 2 to 8 show that the at least one guide element 7 is designed in such a way that the fibrous web 2 guided by it does not touch the surface 7c of the at least one guide element 7 in the region of its two web edges 2a and 2b and therefore also not as previously described , can pollute.
- the guide element 7 is intended to represent a rotating guide roll with a roll cover.
- This roller cover is a rubber layer here, but not shown separately.
- FIG. 2 shows that the guide element 7 has a smaller dimension of the length L than the dimension of the width B of the fibrous web 7. It is thus possible for the fibrous web 2 guided by the guide element 7 to protrude approximately 2 to 50 mm, in particular 5 to 20 mm, on both web edges 2a and 2b. For light papers, a narrow protrusion is preferred. In the case of heavier papers with a higher mass per unit area, excess protrusion should be chosen.
- FIG. 3 shows that the guide element 7 at its two edge regions 7a and 7b has a smaller outer diameter than on the rest of its surface 7c.
- the difference in diameter is denoted by ⁇ d and should be at least 10mm.
- the guide element 7 is designed as a rotating guide roller with a rubber cover, the reference thicknesses in the said edge areas have a smaller thickness than in the rest of the area.
- FIG. 3 also shows that the guide element 7 is set back at its two edge regions 7a and 7b in the axial direction by an amount x.
- the amount x can be up to 400mm.
- FIG. 4 shows that the guide element 7 has at its two edge regions 7a and 7b (only region 7b is shown) at least one additional zone 9 with a smaller diameter or a lower roll cover thickness than in its remaining region.
- the guiding element can thus be used for different widths or formats I, II and possibly other formats of fibrous webs to be guided.
- a format I extends into zone 9 and a format II almost to the edge of the guide element. Further zones 9a-n are conceivable.
- FIGS. 5 to 8 show different embodiments of segment or extension parts 10 which are attached to at least one lateral end 7.1 and 7.2 of the guide element 7 are attachable. Extensions of the guide element 7 are thus possible to the desired extent.
- FIG. 5 shows a first variant of such an attachment part 10. It has a kind of hyperbolic paraboloid shape.
- the guide element 7 here is a rotating roller, whereas the attachment parts 10 mounted at both ends 7.1 and 7.2 of the guide element 7 with a minimal distance can be rotated, but do not rotate during operation.
- the required surface dimension z or z1 can be set, as on the right side of the picture is shown with dashed lines. In this embodiment, the required safety distance from the existing pulley 11 for the transfer of the fibrous web is also maintained.
- FIG. 6 shows a simpler embodiment variant of an attachment part 10.1, which consists of individual, rotatable disks 12 that can be assembled.
- FIG. 7 shows, as a further variant of extension parts 10.2, semicircular profiles which can be assembled and which can also be arranged in any order and exchanged.
- the lining up takes place until the desired length of the guide element 7 is reached.
- the attachment parts 10.2 can be connected to one another or removed again by means of screw connections 13.
- FIGS. 8a and 8b each show a further embodiment variant of an attachment part 10.3, which is an optimization for an offline machine with a pull-in rope for the
- Fibrous web 2 represents. 11 is therefore, as in FIG. 5, pulleys for the pull-in rope, not shown.
- the approach part 10.3 consists of two mutually rotatable segment parts 14.1 and 14.2.
- a variable width adjustment can also be carried out for different web widths, a desired length z also being adjustable. The adjustment is made in stages.
- segment part 14.1 and the oppositely arranged segment part 14.2 are each designed with an inclined rotating surface 15.
- the rotating surface 15 of part 14.1 is concave and part 14.2 is convex.
- FIGS. 9 to 11 show examples of the locations at which a guide element 7 described in the previous figures can be used within the device 1 or a manufacturing or finishing machine. All of these places are marked with a hollow arrow.
- the fibrous web 2 runs over a first guide element 16 which is arranged transversely to the web running direction R and is located on the web side facing away from the coating side and, as in the prior art, is longer than the width of the fibrous web 2.
- the guide element 16 could of course also be designed like the guide element 7 according to the invention and consequently a guide element 7 and thus also shorter than the web width.
- the fibrous web 2 passes the application location A 0 after the guide element 16, where an application unit arranged above the fibrous web 2 - here again a curtain application unit 6 is shown - is stationed.
- the application unit 6 is usually followed by a so-called air turn 17, which on the one hand deflects the fibrous web and also initiates drying.
- the fibrous web 2 then arrives at a contactless dryer 18 (infrared and / or floating dryer) and from there to further treatment stations 20, which are only indicated in FIG. 11, which can be, for example, further coating devices, dryers, smoothing devices, etc.
- Guide elements 7 according to the invention can be arranged up to the winding 25.
- FIG. 9 also shows that the coating medium 3 is applied to the fibrous web 2 to an unsupported area of the web and only then is the guide element 7 or guide roller designed according to the invention arranged.
- a first guide element 7 according to the invention is located below the application unit 6 on the web side facing away from the coating side, and is therefore directly assigned to the application unit.
- a second guide element 7 according to the invention is arranged downstream of the first guide element 7 when viewed in the running direction R of the fibrous web 2.
- a so-called support roll with a larger diameter, which supports the fibrous web 2 during the application is shown, which is to form the guide element 7 here and is therefore directly assigned to the application unit 6 here.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200610027101 DE102006027101A1 (de) | 2006-06-12 | 2006-06-12 | Vorrichtung zur Beschichtung einer laufenden Papier-, Karton- oder anderen Faserstoffbahn |
| PCT/EP2007/054276 WO2007144230A1 (de) | 2006-06-12 | 2007-05-03 | Vorrichtung zur beschichtung einer laufenden papier-, karton- oder anderen faserstoffbahn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2032760A1 true EP2032760A1 (de) | 2009-03-11 |
Family
ID=38473063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07728729A Withdrawn EP2032760A1 (de) | 2006-06-12 | 2007-05-03 | Vorrichtung zur beschichtung einer laufenden papier-, karton- oder anderen faserstoffbahn |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2032760A1 (de) |
| JP (1) | JP3157355U (de) |
| DE (1) | DE102006027101A1 (de) |
| WO (1) | WO2007144230A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1114203A (en) * | 1965-06-08 | 1968-05-22 | Crown Zellerbach Corp | Process and apparatus for the manufacture of plastics coated webs |
| US5105758A (en) * | 1990-08-08 | 1992-04-21 | Eastman Kodak Company | Catch pan for use in curtain coating apparatus |
| DE19631913A1 (de) * | 1996-08-07 | 1998-02-19 | Voith Sulzer Papiermasch Gmbh | Auftragwerk zum direkten oder indirekten einseitigen oder beidseitigen Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton |
| SE511082C2 (sv) * | 1996-12-20 | 1999-08-02 | Btg Eclepens Sa | Beläggningsblad |
| WO1999009253A2 (de) * | 1997-08-15 | 1999-02-25 | Jagenberg Papiertechnik Gmbh | Verfahren und vorrichtung zum auftragen einer pigmentstreichfarbe auf eine papier- oder kartonbahn |
| US20050208225A1 (en) * | 2004-03-19 | 2005-09-22 | Konica Minolta Photo Imaging, Inc. | Coating apparatus and coating method |
| DE102005036667A1 (de) * | 2005-08-04 | 2007-02-08 | Voith Patent Gmbh | Auftragsverfahren |
-
2006
- 2006-06-12 DE DE200610027101 patent/DE102006027101A1/de not_active Withdrawn
-
2007
- 2007-05-03 WO PCT/EP2007/054276 patent/WO2007144230A1/de not_active Ceased
- 2007-05-03 EP EP07728729A patent/EP2032760A1/de not_active Withdrawn
- 2007-05-03 JP JP2009600018U patent/JP3157355U/ja not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007144230A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3157355U (ja) | 2010-02-18 |
| WO2007144230A1 (de) | 2007-12-21 |
| DE102006027101A1 (de) | 2007-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20090112 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: TIETZ, MARTIN Inventor name: REICH, STEFAN Inventor name: STELLNER, BERND-UWE Inventor name: PARTHEYMUELLER, DENNIS Inventor name: KUSTERMANN, MARTIN |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: TIETZ, MARTIN Inventor name: REICH, STEFAN Inventor name: STELLNER, BERND-UWE Inventor name: PARTHEYMUELLER, DENNIS Inventor name: KUSTERMANN, MARTIN |
|
| 17Q | First examination report despatched |
Effective date: 20090814 |
|
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20131029 |