EP3775368A1 - Bespannung für eine maschine zur herstellung einer faserstoffbahn und verfahren zur herstellung einer solchen bespannung - Google Patents
Bespannung für eine maschine zur herstellung einer faserstoffbahn und verfahren zur herstellung einer solchen bespannungInfo
- Publication number
- EP3775368A1 EP3775368A1 EP19701593.6A EP19701593A EP3775368A1 EP 3775368 A1 EP3775368 A1 EP 3775368A1 EP 19701593 A EP19701593 A EP 19701593A EP 3775368 A1 EP3775368 A1 EP 3775368A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- covering
- fabric
- central axes
- openings
- parallel
- 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
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0063—Perforated sheets
Definitions
- film-like material in the context of the present invention is preferably to be read especially on extruded plastic films, but need not necessarily be limited thereto. So this term can refer to any type of flat and flexible bodies that are not made by weaving, so for example on felts or scrim.
- FIG. 1 shows schematically how this method works, wherein FIG. 1 shows only a section of a sheet-like material 12, which forms the base substrate of a fabric 10 to be produced (see FIG. 4).
- the film-like material 12 has a first surface 14, which faces the fabric web 10 in the intended use of the fibrous web, and a second surface 16 opposite the first surface 14 (see FIG. 4).
- the circumferential walls of the through openings 24 extend substantially rotationally symmetrically about a respective central axis 32 of the through opening 24.
- the through openings 24 can essentially have the shape of a straight circular cylinder as shown in Figure 2, or taper or taper conically, as shown in Figure 3.
- the respective central axes 32 always extend in a straight line essentially orthogonal to the first surface 14 or second surface 16.
- the fabric 10 shown in FIG. 4 can then be produced from the thus perforated film-like material 12.
- longitudinal ends of the sheet-like film-like material 12 are usually connected to one another in a seam area in order to make the clothing 10 endless.
- the clothing is limited 10 of a first side edge 34 and a second side edge 36.
- the fabric 10 has a longitudinal direction LR extending parallel to the side edges 34 and 36 and a transverse direction QR extending orthogonal to the side edges 34 and 36.
- Flier it is, for example, possible to provide with the same dewatering capacity fewer through holes in the sheet-like material and / or reduce the diameter of the through holes, so that the sheet-like material is weakened less by the through holes and can absorb more tensile forces.
- the center axis of a through bore starting from the first surface, which faces the fibrous web in the intended use, is inclined in the direction of movement of the fabric, jamming forces in the passage opening, which slow down dewatering of the fibrous web, will act due to the movement of the fabric. As a result, the drainage locally targeted gentle be performed. This effect is also promoted by the fact that the channel length of the through hole increases because of the inclination.
- the center axis of at least one passage opening has a directional component which is aligned parallel to the longitudinal direction of the clothing.
- the direction components formed parallel to the longitudinal direction of the clothing of the center axes of most, preferably all through-holes, such a directional component have to point in the same direction.
- all passage openings may have central axes with a directional component which, when used as intended, point in the direction opposite to the running direction of the clothing, in order to increase the drainage capacity of the clothing.
- the central axis of at least one passage opening has a directional component which is aligned parallel to the transverse direction of the clothing.
- the direction components of the central axes formed parallel to the transverse direction of the clothing of approximately half of the through openings, whose central axes have such a directional component, in the opposite direction as the directional components formed parallel to the transverse direction of the clothing the central axes of the other passage openings whose central axes have such a directional component.
- the covering be delimited by a first side edge and a second side edge, wherein the passage openings, the center axes of which have directional components running parallel to the transverse direction, all pointing in the same direction, are arranged closer to the first side edge of the covering the passage openings whose center axes have directional components running parallel to the transverse direction, pointing in the opposite direction.
- the drainage performance of the fabric can be formed symmetrically with respect to a center region which is arranged between the two side edges of the fabric.
- the clothing has two side edges delimiting it, wherein the center axis of at least one passage opening in an edge region adjacent to one of the two side edges, viewed in particular in the transverse direction of the fabric, a greater deviation from a 90 ° angle to the first surface than the central axis of at least one other through hole in a central region, which is arranged centrally between the two side edges of the fabric.
- the drainage ability of the fabric from a center region, which is arranged centrally between the two side edges of the fabric, to the two side edges decrease continuously.
- the directional components of the center axes of most, preferably all through-openings, whose center axes have such a directional component and are oriented parallel to the longitudinal direction of the clothing can point in the same direction.
- the clothing according to the invention can be a forming fabric, in particular a paper machine, ie a sieve on which a pulp suspension is applied, and through which a large part of the water contained in the pulp suspension is removed.
- This clothing can be installed in a Formierpartie the machine. In principle, however, other parts or sections of the machine are conceivable.
- Figure 5 is a cross-sectional view of a portion of the sheet-like material along the longitudinal direction of the fabric of the invention.
- FIG. 6 is a cross-sectional view of the portion of the sheet-like material along the transverse direction of the fabric of the invention.
- FIG. 5 schematically shows a cross-sectional view of a section of the film-like material 12 along the longitudinal direction LR of the fabric 10 according to the invention.
- the fabric 10 or the film-like material 12 has a first surface 14, which faces the intended use of the fabric 10 of the fibrous web forming on it, and one of the first surface 14 opposite the second surface 16. Further, it can be seen that between the first surface 14 and the second surface 16 extend six through holes 24 through the sheet-like material 12. Through these passage openings 24, the dewatering of the fibrous suspension can be carried out to form the fibrous web.
- Each of the passage openings 24 has a respective rectilinear central axis 32, which is shown in dashed lines in the figures.
- the walls of the through openings 24 extend rotationally symmetrically about the corresponding central axis 32.
- the through openings 32 are all cylindrical, but they could also be cone-shaped, ie, toward the first surface 14 and / or second surface 16 expand.
- the two passage openings 24 shown on the left in FIG. 5 have center axes 32 which extend essentially orthogonally to the first surface 14. This therefore corresponds to the prior art described with regard to FIG. In contrast to this, the two passage openings 24 shown in the middle in FIG.
- center axes 32 which, relative to the first surface, enclose an angle deviating from 90 °.
- the center axes 32 of these two passage openings 24 are inclined relative to the first surface 14 such that the center axes 32 have a directional component RK which is oriented parallel to the longitudinal direction LR of the clothing 10.
- the direction component RK also points in the same direction as the direction MD of the fabric 10 in the intended use.
- the dynamic forces acting in operation of the fabric 10 cause a stowage effect in the middle two through-holes 24, so that in this dewatering compared to the left two through-holes 24, whose central axes 32 substantially orthogonal to the first surface 14 are aligned, slows down expires.
- the two passage openings 24 shown on the right in FIG. 5 also have central axes 32, which, relative to the first surface, enclose an angle that deviates from 90 °. Also, the center axes 32 of these two through holes 24 are inclined relative to the first surface 14 that the Central axes 32 have a directional component RK, which is oriented parallel to the longitudinal direction LR of the fabric 10. Unlike the two passage openings 24 shown in the middle in Figure 5, the directional component RK of these two through holes 24, however, in the opposite direction to the direction MD of the fabric 10 in normal use.
- the dynamic forces acting during operation of the fabric 10 cause a suction effect in the right two through holes 24, so that in this dewatering compared to the left two through holes 24, whose central axes 32 substantially orthogonal to the first surface 14 are aligned, and even more so compared to the middle two through holes 24, accelerated expires.
- FIG. 6 schematically shows a cross-sectional view of a section of the film-like material 12 along the transverse direction QR of the fabric 10 according to the invention. It can be seen in Figure 6 five through holes 24, each extending between the first surface 14 and the second surface 16 through the sheet-like material 12 therethrough. Each of the passage openings 24 again has a respective rectilinear central axis 32. The walls of the passage openings 24 extend substantially rotationally symmetrically about the corresponding central axis 32.
- the passage opening 24 shown centrally in FIG. 6 has a central axis 32 which extends substantially orthogonally to the first surface 14. This therefore corresponds to the prior art described with regard to FIG.
- the two shown on the left in Figure 6 through holes 24 center axes 32, which include opposite the first surface 14 a 90 ° recognizably different angle.
- the center axes 32 of these two through openings 24 are inclined with respect to the first surface 14 such that the center axes 32 have a directional component RK which is oriented parallel to the transverse direction QR of the fabric 10.
- the Direction component RK points for these two through holes 24 to the left in Figure 6.
- the two passage openings 24 shown on the right in FIG. 6 also have central axes 32 which, relative to the first surface, enclose an angle deviating from 90 °.
- the center axes 32 of these two through openings 24 are inclined with respect to the first surface 14 such that the center axes 32 have a directional component RK which is oriented parallel to the transverse direction QR of the fabric 10.
- the directional component RK of these two through holes 24 is in the opposite direction, i.e., in the opposite direction. to the right in FIG. 6.
- the inclination of the central axis 32 of the two outermost through holes 24 relative to the orthogonal to the first surface 14 is greater than the inclination of the central axes 32 of the two passage openings 24, each between the central passage opening 24 and two outer through holes 24 are arranged.
- the stronger the inclination the greater the channel length of the corresponding through-hole 24 and the slower or gentler the dehydration.
- the through hole 24 shown in the middle in FIG. 6, whose center axis 32 is oriented substantially orthogonal to the first surface 14, is also arranged in a central region which lies in the middle between the two side edges 34 and 36 (see Figure 3) of the fabric is located. In this way, the dewatering characteristic may be substantially symmetrical with respect to the transverse profile of the fabric 10.
Landscapes
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018107075.6A DE102018107075A1 (de) | 2018-03-26 | 2018-03-26 | Bespannung für eine Maschine zur Herstellung einer Faserstoffbahn und Verfahren zur Herstellung einer solchen Bespannung |
| PCT/EP2019/051198 WO2019185210A1 (de) | 2018-03-26 | 2019-01-18 | Bespannung für eine maschine zur herstellung einer faserstoffbahn und verfahren zur herstellung einer solchen bespannung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3775368A1 true EP3775368A1 (de) | 2021-02-17 |
| EP3775368B1 EP3775368B1 (de) | 2024-07-03 |
| EP3775368C0 EP3775368C0 (de) | 2024-07-03 |
Family
ID=65228517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19701593.6A Active EP3775368B1 (de) | 2018-03-26 | 2019-01-18 | Bespannung für eine maschine zur herstellung einer faserstoffbahn und verfahren zur herstellung einer solchen bespannung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11306437B2 (de) |
| EP (1) | EP3775368B1 (de) |
| CN (1) | CN111868326A (de) |
| DE (1) | DE102018107075A1 (de) |
| WO (1) | WO2019185210A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3835617A1 (de) * | 2019-12-10 | 2021-06-16 | Habasit AG | Förderband, insbesondere spindelband, mit lateralen ultraschall- oder laserschnittseiten |
| US12146265B2 (en) * | 2020-06-02 | 2024-11-19 | First Quality Tissue, Llc | Dewatering box cover |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH392239A (de) | 1960-07-23 | 1965-05-15 | Heimbach Gmbh Thomas Josef | Filterbahn zur Blattbildung und zur Stoffentwässerung und -trocknung bei Papiermaschinen oder dergleichen |
| US3877364A (en) * | 1970-06-17 | 1975-04-15 | Centre Tech Ind Papier | Method for continuous extraction of liquid from a pasty suspension |
| CS198481B1 (en) * | 1977-05-20 | 1980-06-30 | Cestmir Balcar | Multilayer felt,method of and apparatus for manufacturing same |
| SE429769B (sv) | 1980-04-01 | 1983-09-26 | Nordiskafilt Ab | Arkaggregat och sett att tillverka detsamma |
| US4537658A (en) * | 1982-09-30 | 1985-08-27 | Scapa Inc. | Papermakers fabric constructed of extruded slotted elements |
| CA2155223C (en) | 1990-06-29 | 1997-11-11 | Paul Dennis Trokhan | Papermaking fabric |
| US5700356A (en) | 1996-01-19 | 1997-12-23 | Lefkowitz; Leonard R. | Air permeable belt for dewatering web in press nip |
| GB9617791D0 (en) | 1996-08-24 | 1996-10-02 | Scapa Group Plc | Permeable belts |
| US5837102A (en) | 1997-04-24 | 1998-11-17 | Voith Sulzer Paper Technology North America, Inc. | Perforated and embossed sheet forming fabric |
| KR20010012683A (ko) | 1997-05-19 | 2001-02-26 | 데이비드 엠 모이어 | 제지 벨트 및 그 제조 방법과, 셀룰로오스 섬유 웹 및 그제조 방법과, 종이 웹 |
| US5962860A (en) | 1997-05-19 | 1999-10-05 | The Procter & Gamble Company | Apparatus for generating controlled radiation for curing photosensitive resin |
| US5948210A (en) | 1997-05-19 | 1999-09-07 | The Procter & Gamble Company | Cellulosic web, method and apparatus for making the same using papermaking belt having angled cross-sectional structure, and method of making the belt |
| US6248210B1 (en) | 1998-11-13 | 2001-06-19 | Fort James Corporation | Method for maximizing water removal in a press nip |
| US6660362B1 (en) | 2000-11-03 | 2003-12-09 | Kimberly-Clark Worldwide, Inc. | Deflection members for tissue production |
| DE102005031276A1 (de) * | 2005-07-05 | 2007-01-18 | Voith Patent Gmbh | Papiermaschinenbespannung |
| MX2011002620A (es) | 2008-09-11 | 2011-05-25 | Albany Int Corp | Banda permeable para la fabricacion de papel de seda, de toalla y materiales no tejidos. |
| US8454800B2 (en) | 2009-01-28 | 2013-06-04 | Albany International Corp. | Industrial fabric for producing tissue and towel products, and method of making thereof |
| DE102010040089A1 (de) | 2010-09-01 | 2012-03-01 | Voith Patent Gmbh | Gelochte Folienbespannung |
-
2018
- 2018-03-26 DE DE102018107075.6A patent/DE102018107075A1/de active Pending
-
2019
- 2019-01-18 CN CN201980019739.8A patent/CN111868326A/zh active Pending
- 2019-01-18 WO PCT/EP2019/051198 patent/WO2019185210A1/de not_active Ceased
- 2019-01-18 EP EP19701593.6A patent/EP3775368B1/de active Active
- 2019-01-18 US US16/971,999 patent/US11306437B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20200399829A1 (en) | 2020-12-24 |
| US11306437B2 (en) | 2022-04-19 |
| EP3775368B1 (de) | 2024-07-03 |
| DE102018107075A1 (de) | 2019-09-26 |
| EP3775368C0 (de) | 2024-07-03 |
| CN111868326A (zh) | 2020-10-30 |
| WO2019185210A1 (de) | 2019-10-03 |
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