EP3844340A1 - Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn - Google Patents
Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahnInfo
- Publication number
- EP3844340A1 EP3844340A1 EP19728420.1A EP19728420A EP3844340A1 EP 3844340 A1 EP3844340 A1 EP 3844340A1 EP 19728420 A EP19728420 A EP 19728420A EP 3844340 A1 EP3844340 A1 EP 3844340A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- headbox
- wire
- topformer
- fourdrinier
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
- D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/18—Shaking apparatus for wire-cloths and associated parts
- D21F1/20—Shaking apparatus for wire-cloths and associated parts in Fourdrinier machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
Definitions
- the invention relates to a method and a machine for producing a multi-layer fibrous web, in particular multi-layer paper or cardboard web.
- multilayer headboxes have been used on gap formers for the production of multilayer papers.
- Multi-ply screening machines or four-wire screens with hybrid formers are also known, in which two-layer headboxes are used. So far, such an application has mainly been used in test liners.
- the use of multi-layer technology which has been known for a long time, has also been tried on various other types of paper.
- the main problem with a multi-layer headbox is now the layer cleanliness. As a rule, at least 40 g / m 2 covering weight is required to achieve a uniform color of the ceiling layer. A very specific adjustment of the headbox and former is often required to ensure the best possible coverage with low weight. A narrow window for the headbox stock density and the stock suspension jet screen speed difference is particularly important here, since both parameters have a strong influence on the paper strength and formation. Since the headbox consistency and the jet-sieve speed difference should be higher for good coverage, a larger break length ratio RLV must be accepted accordingly, which leads to poorer transverse strengths (SCT-CD, RCT-CD). The tear length ratio RLV is the ratio of the tear length in the machine direction MD and the tear length in the cross machine direction CD.
- the strip crush resistance SCT determines the crush resistance of a flat paper strip of standardized dimensions
- the ring crush resistance RCT specifies the crush resistance of a strip of paper shaped into a ring with standardized width and length.
- the invention is based on the object of specifying an improved method and an improved machine of the type mentioned at the outset with which the problems mentioned above are eliminated.
- good coverage in combination with a high transverse strength of the fibrous web formed should be achieved on the respective wire or TopFormer.
- this object is achieved by a method and a machine for producing a multi-layer fibrous web, in particular a multi-layer paper or cardboard web, with the features of claim 1 and claim 1 1, respectively.
- Preferred embodiments of the method according to the invention and preferred embodiments of the machine according to the invention result from the subclaims, the present description and the drawing.
- the inventive method for producing a multi-layer pulp web, particularly a multilayered paper or paperboard web is characterized in that at least two layers of by means of a multilayer headbox one provided with a breast roll shaking wire or TopFormer, particularly TopFormer F ® of the Applicant, supplied fiber suspensions be formed.
- the breast roller provided with a corresponding shaking device, around which the four-wire screen in question is guided in the region of the multi-layer headbox, can be shaken back and forth in the transverse direction, in particular horizontally, by the shaking device.
- the method according to the invention it is possible, for example, two different fiber materials or colored fiber materials with the same or to produce different fiber length and / or fine material and / or filler spectra with just one forming unit, the coverage quality being significantly improved compared to a conventional mode of operation without screen shaking.
- a good layer cleanliness is achieved with a consistently good formation.
- the use of a sieve shaker also smoothes out flakes or strips, which up to now have mainly been formed in the upper layer due to the low turbulence required at the start of sheet formation, and which have so far had a negative impact on the quality of coverage.
- the sieve shaking according to the invention thus also has the advantage that the formation losses caused by low-pulsation sheet formation and irregularities on the surfaces are compensated for without mixing the different layers or layers, as for example caused by insertion of turbulence would cause.
- the screen shaking compensates for a greater tear length ratio RLV, which is created by the operation of the headbox in the under or overflow which is advantageous for the covering and formation.
- the screen shaking according to the invention thus also avoids or at least reduces, in particular, a larger tear length ratio RLV and the associated reduction in the transverse strength, which has hitherto often been disadvantageous, in particular in the production of packaging paper.
- the length of the paper machine in question can also be reduced accordingly, which also results in correspondingly lower production costs.
- At least two different or differently colored fiber suspensions are fed to the relevant wire or top former using the multi-layer headbox.
- a suctioned sieve table is assigned to the relevant Fourdrinier wire or TopFormer.
- a good layer cleanliness requires, on the one hand, a quick fixation of the covering layer or layer and, on the other hand, a formation that is as uniform as possible, which prevents the inevitable shining through of the other layer or layer, in particular with small basis weights of the covering layer or high color contrast of the equalized both layers like milk glass.
- the suction screen table which is preferably provided provides a more rapid fixation of the covering layer, so that the undesired mixing of the covering layer and the further layer is substantially prevented, preferably with the smallest possible pulses. Accordingly, a sieve table which generates the smallest possible impulses is preferably used as the suctioned sieve table in order to at least substantially prevent undesired mixing of the covering layer with a respective further layer formed from another fiber suspension provided by the multi-layer headbox.
- a two-layer headbox is advantageously used as the multi-layer headbox. It is particularly advantageous if a top layer and a bottom or gentle layer are produced from the fiber stock suspensions supplied by the multi-layer material run.
- a four-layer fibrous web is produced.
- a particularly advantageous practical embodiment of the method according to the invention is characterized in that a top layer and a bottom cover or protective layer made of the fiber suspensions supplied by the multi-layer headbox on a first Fourdrinier wire guided around a breast roll with associated breast roll shaker and a middle layer on a second Fourdrinier wire are formed from a fibrous stock suspension fed to the latter by means of a further headbox, the top layer and the bottom or protective layer as well as the middle layer at a point of contact of the first fourdrinier wire and the second fourdrinier wire are gassed together, and the gummed up layers in particular in the area of a rubber roller around which the first fourdrinier wire is guided with the middle layer after the top layer and the underlayer or protective layer have been gassed, with a fiber slurry suspension formed on a third wire from a further headbox his reserve will be spilled.
- the machine according to the invention which is particularly suitable for carrying out the method according to the invention, for producing a multilayer fibrous web, in particular multilayer paper or cardboard web, is characterized in that a multilayer headbox is provided to form at least two layers. is hen and the fiber suspension supplied by said multi-layer headbox to form emissions of at least two layers of a lung with a Housewalzen maybee- provided wire or TopFormer, in particular F ® TopFormer the presence melderin be supplied.
- At least two different and / or differently colored fiber suspensions are fed to the relevant wire or TopFormer by means of the multi-layer headbox. It is particularly advantageous if at least two fibrous stock suspensions with the same or different fiber length and / or the same or different filler spectrum are fed to the relevant wire or TopFormer by means of the multi-layer headbox.
- a suction sieve table is assigned to the respective wire or top former.
- a screen which generates the smallest possible impulses is preferably provided as the screened screen table in order to prevent undesirable mixing of the covering layer with a respective further layer formed from another fiber suspension provided by the multi-layer headbox, at least essentially.
- the multi-layer headbox is designed as a two-layer headbox. It is also particularly advantageous if a top layer and a bottom or gentle layer are produced from the fiber stock suspensions supplied by the multi-layer headbox.
- a preferred practical embodiment of the machine according to the invention is characterized in that it is designed to form a four-layer fibrous web.
- the machine according to the invention can in particular be designed to form a multi-layer fibrous web with a top layer, a bottom or protective layer, a middle layer and a top layer.
- a preferred practical embodiment of the machine according to the invention is characterized in that from the fibrous stock suspensions supplied by the multi-layer headbox, a top layer and a bottom cover or protective layer are guided on a first wire through a breast roll with associated breast roll shaking, and on a second wire from this using a a pulp suspension is fed to a further headbox, the top layer and the bottom or protective layer as well as the middle layer at a point of contact of the first fourdrinier wire and the second fourdrinier wire are gassed together, and the gummed up layers in particular in the area of a rubber roller , around which the first fourdrinier wire is passed after the top layer and the lower or lower layer have been gassed with the middle layer, with a fibrous suspension formed on a third wire from a further headbox Reserve are squandered.
- FIG. 2 shows a schematic illustration of an exemplary embodiment of a machine according to the invention for producing a four-ply cardboard web here, for example.
- Fig. 1 shows a schematic representation of a conventional machine 10 for producing a four-layer cardboard web with a top layer, a bottom or protective layer, a middle layer and a back.
- the top layer is made from a fibrous suspension applied to a first wire 14 by means of a first headbox 12
- the bottom or protective layer is made from a fiber suspension applied to a second wire 18 by means of a second headbox 16
- the middle layer is made by means of a third headbox 20 formed on a third Fourdrinier 22 fiber suspension.
- a former 24 is assigned to the third Fourdrinier wire 22.
- the reserve is formed by a fiber suspension applied to a fourth wire 28 by means of a fourth headbox 26.
- the lower deck or protective layer formed on the second four wire 18 is gassed with the middle layer formed on the third wire 24 at a contact point 30 of the two wires 18 and 22.
- the lower deck or protective and middle layer thus gummed with one another are then gassed at a contact point 32 of the second fourdrinier wire 18 with the fourth fourdrinier wire 28 with the reserve formed on this fourth fourdrinier wire 28.
- the layers rubberized with one another in this way that is to say the lower cover or protective layer, the middle layer and the reserve, are finally littered with the cover layer at a point of contact 34 of the fourth fourdrinier wire 28 with the first fourdrinier wire 14.
- Such a conventional machine has, among other things, the disadvantages mentioned at the outset.
- FIG. 2 shows a schematic illustration of an exemplary embodiment of a machine 36 according to the invention for producing a multilayer fibrous web.
- the machine 36 is designed, for example, to produce a four-layer cardboard web.
- this machine 36 comprises, as a multi-layer headbox, for example a two-layer headbox 38 and a first Fourdrinier wire 40, on which a top layer as well as a bottom or gentle layer are formed by the fibrous stock suspensions supplied by means of the two-layer headbox 38.
- the first fourdrinier wire 40 is guided in the region of the two-layer headbox 38 around a breast roller 42, to which a breast roller shaker 44 is assigned, by means of which the breast roller 42 and thus the first fourdrinier wire 28 are shaken horizontally in the transverse direction (CD direction) of the machine.
- a middle layer is formed on a second Fourdrinier wire 46 from a fiber stock suspension fed to it by means of a further headbox 48. As shown, for example a former 50 can be assigned to this second wire 4.
- the cover layer and the lower cover or protective layer and the middle layer are gassed together at a contact point 52 of the first fourdrinier wire 40 and the second fourdrinier wire 46.
- the layers that have been rubberized with one another namely the top layer, the bottom cover or protective layer and the middle layer, at a point of contact 54, in the present case in the area of a rubber roller 56 around which the first fourdrinier wire 40 after the top layer and bottom deck have been gassed - or a protective layer is guided with the middle layer, with a reserve formed on a third Fourdrinier wire 58 from a fibrous suspension fed by means of a further headbox 60.
- the two-layer headbox 38 for example, two different and / or differently colored fiber suspensions can be fed to the first wire 40.
- two fibrous suspensions with the same chemical or different fiber length and / or the same or different filler spectrum can be fed to this first Fourdrinier 40 by means of the two-layer headbox 38.
- a suction sieve table can be assigned to the first fourdrinier sieve 40.
- the smallest possible momentum-generating sieve table can be used as the suctioned sieve table in order to at least substantially prevent undesired mixing of the cover layer with the lower cover or protective layer formed from the other fibrous material suspension supplied by the two-layer headbox.
- the rapid fixation of the covering layer is ensured, for example, by the vacuum screen table mentioned, which preferably essentially prevents the undesired mixing of the two layers or the cover layer and the lower cover or protective layer with the smallest possible pulses. Due to the required low turbulence at the beginning of the sheet formation, flakes or superficial stripes have been able to form, especially in the covering layer, which have a negative effect on the covering quality. These flakes or strips are now leveled out by using a screen shaker according to the invention. This has the particular advantage that the formation losses and superficial irregularities caused by the low-pulsation sheet formation are compensated for without causing a mixing of the covering layer and the further layer, as would occur, for example, through introduction by turbulence.
- the screen shaking according to the invention compensates for the increased rupture length ratio RLV, which arises from the operation of the headbox in the under or overflow, which is advantageous for the covering and formation.
- a larger tear length ratio RLV which has hitherto often had a disadvantage, in particular in the production of packaging paper, and a reduction in the transverse strength associated therewith are thus avoided or at least reduced by the screen shaking according to the invention.
- Another advantage is that the machine length is shorter and there is no headbox, which also reduces manufacturing costs accordingly.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018121155.4A DE102018121155A1 (de) | 2018-08-30 | 2018-08-30 | Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn |
| PCT/EP2019/064340 WO2020043338A1 (de) | 2018-08-30 | 2019-06-03 | Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3844340A1 true EP3844340A1 (de) | 2021-07-07 |
| EP3844340C0 EP3844340C0 (de) | 2025-07-16 |
| EP3844340B1 EP3844340B1 (de) | 2025-07-16 |
Family
ID=66752115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19728420.1A Active EP3844340B1 (de) | 2018-08-30 | 2019-06-03 | Verfahren und maschine zur herstellung einer mehrlagigen faserstoffbahn |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3844340B1 (de) |
| CN (1) | CN112585317B (de) |
| DE (1) | DE102018121155A1 (de) |
| WO (1) | WO2020043338A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11441268B2 (en) * | 2018-01-05 | 2022-09-13 | International Paper Company | Paper products having increased bending stiffness and cross-direction strength and methods for making the same |
| CN113463427B (zh) * | 2021-07-20 | 2022-08-09 | 重庆理文造纸有限公司 | 一种环保箱板纸的生产系统 |
| DE102022102865A1 (de) | 2022-02-08 | 2022-12-08 | Voith Patent Gmbh | Verfahren und Formiersektion zur Herstellung einer mehrlagigen Faserstoffbahn mit einem Auftrag von aufgeschäumten, flüssigen oder aufgeschäumten pastösen Auftragsmedien |
| DE102022107202A1 (de) * | 2022-03-28 | 2023-09-28 | Voith Patent Gmbh | Mehrlagenfaserstoffbahn |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190328611A (en) * | 1903-12-30 | 1904-12-15 | Samuel Milne | Improvements in and relating to Paper and Pulp Making Machines. |
| DE19706940A1 (de) * | 1997-02-20 | 1998-08-27 | Voith Sulzer Papiermasch Gmbh | Siebpartie und Verfahren zur Blattbildung in einer Siebpartie einer Papiermaschine |
| DE10223398A1 (de) * | 2002-05-25 | 2003-12-04 | Voith Paper Patent Gmbh | Blattbildungsvorrichtung |
| DE102005063008A1 (de) * | 2005-12-30 | 2007-07-05 | Voith Patent Gmbh | Blattbildungsvorrichtung zum Bilden einer Faserstoffbahn |
| FI120747B (fi) * | 2006-09-21 | 2010-02-15 | Metso Paper Inc | Paperi- tai kartonkikone |
| FI20075851A7 (fi) * | 2007-11-28 | 2009-05-29 | Metso Paper Inc | Muodostusosa |
| FI20095440A7 (fi) * | 2009-04-22 | 2010-10-23 | Valmet Technologies Inc | Muodostusosa |
| DE102010029617A1 (de) * | 2010-06-02 | 2011-12-08 | Voith Patent Gmbh | Verfahren zur Herstellung einer gestrichenen, mehrlagigen Faserstoffbahn |
| DE102010039198A1 (de) * | 2010-08-11 | 2012-02-16 | Voith Patent Gmbh | Schüttelvorrichtung |
| WO2012041392A1 (en) * | 2010-10-01 | 2012-04-05 | Metso Paper, Inc. | Device and method for manufacturing a web consisting of multiple layers |
| CN208701408U (zh) * | 2014-11-28 | 2019-04-05 | 福伊特专利有限公司 | 用于制造纤维料幅的设备 |
| CN107073865B (zh) * | 2014-11-28 | 2020-10-20 | 福伊特专利有限公司 | 用于制造包装纸的方法和设备 |
| CN104727177B (zh) * | 2015-03-31 | 2017-03-08 | 山东太阳生活用纸有限公司 | 一种成形部装置的控制方法 |
| CN205474569U (zh) * | 2016-01-11 | 2016-08-17 | 东莞玖龙纸业有限公司 | 一种牛卡纸造纸机的胸辊摇振系统 |
-
2018
- 2018-08-30 DE DE102018121155.4A patent/DE102018121155A1/de not_active Ceased
-
2019
- 2019-06-03 CN CN201980054624.2A patent/CN112585317B/zh active Active
- 2019-06-03 EP EP19728420.1A patent/EP3844340B1/de active Active
- 2019-06-03 WO PCT/EP2019/064340 patent/WO2020043338A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3844340C0 (de) | 2025-07-16 |
| CN112585317B (zh) | 2023-06-16 |
| EP3844340B1 (de) | 2025-07-16 |
| WO2020043338A1 (de) | 2020-03-05 |
| CN112585317A (zh) | 2021-03-30 |
| DE102018121155A1 (de) | 2020-03-05 |
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