EP0899376A2 - Chariot de format pour une section de formage - Google Patents

Chariot de format pour une section de formage Download PDF

Info

Publication number: EP0899376A2
Authority: EP; European Patent Office
Prior art keywords: format; sieve; machine; sheet formation; machine direction
Prior art date: 1997-08-29
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

Application number

EP98114697A

Other languages

German (de)

English (en)

Other versions

EP0899376A3 (fr

EP0899376B1 (fr

Inventor

Wolfgang Ruf

Thomas Dietz

Konstantin Fenkl

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Voith Patent GmbH

Original Assignee

Voith Sulzer Papiermaschinen GmbH

Voith Sulzer Papiertechnik Patent GmbH

Priority date (The priority date 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 date listed.)

1997-08-29

Filing date

1998-08-05

Publication date

1999-03-03

1998-08-05 Application filed by Voith Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH

1999-03-03 Publication of EP0899376A2 publication Critical patent/EP0899376A2/fr

1999-11-17 Publication of EP0899376A3 publication Critical patent/EP0899376A3/fr

2003-05-14 Application granted granted Critical

2003-05-14 Publication of EP0899376B1 publication Critical patent/EP0899376B1/fr

2018-08-05 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

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
- D21F1/56—Deckle frame arrangements

Definitions

the invention relates to a sheet formation system Fourdrinier paper machine or Fourdrinier paperboard machine according to the preamble of claim 1 and a Process for the reduction of edge waves according to the Preamble of claim 9.
the sieve After the point of impact of the fabric suspension jet the sieve shows the material suspension at the edges of the Siebes the tendency to run sideways. For this Basically in the border area of the sieves after the nozzle of the headbox so-called format plates attached, the lateral run of the Stock suspension and thus a dilution of ultimately emerging paper web in this area should prevent.
Such a format label is for example from the German published application DE 43 34 641 A1 known, the content of which is hereby fully disclosed in this registration is included.
the task of this invention shown there is a constant accumulation of fiber layers, which can be found in the Edge areas of the flowing pulp suspension by drying and then bonded into the peel fresh fiber suspension, to avoid.
spray spray fountain format plates it is proposed in the area of Spray spray fountain format plates to provide the Surfaces of the format plates with a flowing Cover water film so that such Drying of fiber accumulations is avoided.
the format label itself consists of a flat one Ledge by hollow profiles in their Directional stability is stiffened and their Alignment points exactly in the machine direction.
the known Sheet forming system of a Fourdrinier machine especially the format plates of the sheet formation system to develop further in such a way that the formation of Edge waves reduced, or as far as is avoided as possible.
the first task to improve the Sheet formation system is characterized by the characteristics of the Claim 1 solved.
the second task for Description of a method for reducing Edge waves is characterized by the features of claim 9 solved.
the marginal problem in the sheet formation system is one Problem at the interface between headbox and Wire section. It includes the guidance of the free jet and the associated reflection waves and a part the format limit for sheet formation. Due to the Improvement of the transverse profiles of the paper web through the recent developments in the field of headbox, which allow a sectioned material density regulation, marginal problems have a significantly more negative effect than so far. The causes of these edge waves or Reflection waves can have different causes.
edge waves are caused by edge effects, which is in the form of an arc at the top Express the format sign of the secondary currents. Due to the large wetted areas, the flow in the Edge area braked considerably and decreases due to the Continuity conditions a larger space in Claim. This way, the slower blocks Edge flow of the main flow, which emerges at the nozzle outlet approximately with outlet width, on the length of the Format label increasingly the desired Flow direction. The consequence is necessarily a local one Beam deflection towards the center of the machine, which as Reflection wave appears.
This problem is particularly slow-moving Machines affected with large stomata operate.
the reflection waves have enough here Time to sit on the Fourdrinier in the to expand the production-relevant area of the railway.
the different effects are with fast machines a little weaker, but basically the same available.
the secondary flows can be different Effects arise:
the bezel must have a certain undersize, which creates a gap between the cover and the format label. This should ideally be about 0.15 mm, but 0.25 mm do not exceed.
the groove of the panel seal cannot be brought up to the tip of the panel.
a Self-sealing in this area by fibers, especially with faster machines, is due to the prevailing high pressure there difficult.
the Secondary flow on the format label can cause problems such as Spraying, contamination of the wire section and Braids appear. This can be significant Cause disturbances, especially if the gap, for example, by a not centered Aperture position, too large.
Another way to create Secondary flows can be caused by shaking the sieve be given.
shaking the sieve Stock suspension speed components in Imprinted transverse direction with a Format limitation the impulses arising here be reflected and in the form of an edge wave Run in the middle of the web.
the essential element of the invention is that the inventors recognized that the Reflection waves or edge waves reduced can be if the secondary flow has room for one lateral expansion is given.
Another option is to use the unwanted secondary flow through the To give space to the format label contour and thus the Main flow not to narrow or not to redirect towards the center of the machine.
This can for example with an adjustable format label will be realized.
the Flow shortly after exiting the nozzle to be influenced.
the secondary flows which are previously arched upwards on the format label trained, are discharged laterally, Reflection waves are reduced respectively purposefully steered closer to the edge without the goal the format limit is abandoned.
the Adjust the format label so that with increasing distance from the headbox Change, preferably a broadening of for the area available for the stock suspension arises.
Such a new format label can consist of several parts, preferably be carried out in two parts, from The format limit from one end of the table plate component that can be specifically bent by clamping elements, preferably a plastic element.
the maximum adjustability also perpendicular to Sieve surface can the format label very close to that Sieve (preferably about 0.5 mm) are placed.
a known one Sheet forming system of a fourdrinier paper machine or Fourdrinier board machine with a headbox, at least one rotating sieve and at least two, attached to the edge of the sieve Further develop format signs in such a way that the Side shields are designed or attached in such a way that the clear distance of the side shields at least over a substantial part of their length in Machine direction can increase.
the side shields can be advantageous seen at least in sections in the machine direction train elastic.
the elastic training of the Format label can for example by perpendicular to Weakening of the material thickness of the Format label or by a replacement in places of the material through a particularly elastic material such as plastic or rubber.
the format label can also move can be achieved if it has at least one joint is provided, the axis of which is substantially perpendicular or is also slightly inclined to the sieve level.
a device for deforming the side shields is provided at least in the machine direction.
This Embodiment can be further developed by that at least one of the devices for deformation the side shields with a tensile and / or compressive force at least one directional component transverse to Exercises machine direction and / or that at least one of the devices for deforming the format plates a lever arm arranged on the side of the format label attacks and a tensile and / or compressive force with at least one directional component in Machine direction.
a method is also used to reduce edge waves in a Sheet forming system of a fourdrinier paper machine or Fourdrinier board machine in the field of Material suspension application on a rotating sieve proposed, in order to limit the sheet forming a mechanical side boundary is used, the area available for the stock suspension increasing in the machine direction, continuously changed, preferably widened.
Figure 1 is a partial view of a Sheet formation system shown in longitudinal section.
On on the left is the nozzle area of the Headbox 1 with the lower lip 2 and the aperture 3 shown above.
the Nozzle gap between the aperture 3 and the lower lip 2 the stock suspension is pushed through and hits in Beam impact point 6 on the sieve 10 below on.
the screen 10 runs over a breast roll 12 a horizontally running sieve table 11.
over the fabric suspension layer is characterized by a variety of Arrows the secondary flow 5, which is in this Area builds up, shown.
the Figure the format label 9 attached to the side his wall area over a dried one Fabric area 7 and a wet area underneath 8 has.
FIG. 2 The cross section A indicated in FIG. 1 is in FIG Figure 2 shown.
This Figure 2 shows a section through the sieve 10 below, the format label 9, that is adjusted at a distance 14 from the running sieve 10 is.
Material suspension layer 4 can be seen that the Side of the format label through the secondary flow 5 builds up and shows the tendency on the side wall of the Crawl upwards.
This tendency of the current to creep up reduced This happens because of the gap 14 a derivative of the pressure pulse that normally runs against the format label 9 and is reflected there is avoided.
the pressure pulse respectively a substantial part of the pressure pulse can be due to this Escape way between sieve 10 and 9 format label.
Figure 3 shows the Area of Figure 1 in plan view. Going from above the nozzle area of the headbox 1 can be seen, which has a side wall 15 on which the inventive format label 9 with a Adjustment device 20 is attached.
the format label 9 is in this example of two connected Segments 9.1 and 9.2 built up, each over one relatively thick-walled main area and a thinner one and thus have elastic transition region 26.
the thick-walled main areas themselves have side arms 9.3 and 9.4 that again in the machine direction on adjusting rods 16.1 and 16.2 are attached.
Adjustment rods result in elastic deformation the format label in the area of the thinner version (lower section modulus).
the format label moves slightly to the direction of the paper web and can thus be used for the undisturbed flow of the Provide material suspension necessary space, without changing the suspension height.
This format label is dashed by lines 17 shown.
This format label can preferably be made from Made of plastic or stainless steel become.
the elastic regions 26 can Gain elasticity by weakening the Material thickness is generated in this area 26.
Figure 4 shows a side view of this Embodiment of a format label according to the invention, the longitudinal adjustment of the format label over the Adjustment rods 16.1 and 16.2 can be clearly seen.
the Format label itself is with a screw connection the adjusting screws 18.1, 18.2 and 18.3 on the Side wall 15 of the headbox attached.
adjusting screws 18.1, 18.2 and 18.3 can be the angle of the format label to Sieve level can be set (swivel angle 24).
the Adjusting screw 19 the distance of the format label 9 from sieve 10 below it can be adjusted (Distance adjustment 25).
Gap 14 between format label 9 and sieve 10 in adjust in any way, whereby by the Angle adjustment also different gap heights 14 over the length of the format label can. Furthermore, 16.1 and 16.2 the bend of the format label in Machine direction set in the desired way become.
the section A-A of Figure 4 is in Figure 5, using the same reference numerals, shown.
one format label according to the invention compared to the stand technology a significant reduction in the edge waves reached at the beginning of the sheet formation system and thus produces an overall improved paper quality become.

Landscapes

Paper (AREA)

EP98114697A 1997-08-29 1998-08-05 Section de formage avec chariot de format Expired - Lifetime EP0899376B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19737646A DE19737646A1 (de)	1997-08-29	1997-08-29	Blattbildungssystem mit Formatschilden
DE19737646		1997-08-29

Publications (3)

Publication Number	Publication Date
EP0899376A2 true EP0899376A2 (fr)	1999-03-03
EP0899376A3 EP0899376A3 (fr)	1999-11-17
EP0899376B1 EP0899376B1 (fr)	2003-05-14

Family

ID=7840532

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98114697A Expired - Lifetime EP0899376B1 (fr)	1997-08-29	1998-08-05	Section de formage avec chariot de format

Country Status (3)

Country	Link
US (1)	US6214169B1 (fr)
EP (1)	EP0899376B1 (fr)
DE (2)	DE19737646A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1681390A1 (fr) *	2005-01-14	2006-07-19	Vaahto OY	Dispositif dans une machine à papier ou à carton de limiter l'écoulement de pâte de la caisse de tête
DE102009000502A1 (de)	2009-01-30	2010-08-05	Voith Patent Gmbh	Blattbildungssystem für eine Maschine zur Herstellung einer Faserstoffbahn
DE102009000497A1 (de)	2009-01-30	2010-08-05	Voith Patent Gmbh	Blattbildungssystem für eine Maschine zur Herstellung einer Faserstoffbahn
WO2011086231A1 (fr) *	2010-01-15	2011-07-21	Metso Paper, Inc.	Dispositif pour une section de formation de film d'une machine de film de fibres
WO2020030352A1 (fr) *	2018-08-06	2020-02-13	Voith Patent Gmbh	Procédé de réduction d'ondulations de bord dans un système de formation de feuilles et système de formation de feuilles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US8236139B1 (en) *	2008-06-30	2012-08-07	International Paper Company	Apparatus for improving basis weight uniformity with deckle wave control

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE500956C (de) *		1930-07-19	J M Voith Maschinenfabrik	Langsiebpapier-, Karton- oder Pappenmaschine, bei der die Begrenzung der Stoffbahn durch zwei in der Breite verstellbare Begrenzungsstreifen und durch Wasserstrahlen erfolgt
US1734929A (en) *	1926-06-28	1929-11-05	Vedder John Warren	Paper-making machine
US3150035A (en) *	1961-12-22	1964-09-22	Nalco Chemical Co	Treatment of fourdrinier wire
US3281314A (en) *	1964-02-21	1966-10-25	Fitchburg Paper	Stock flow apron for a fourdrinier wire
US3607624A (en) *	1969-08-22	1971-09-21	Nekoosa Edwards Paper Co Inc	Self-cleaning deckle rail for papermaking machines
FR2128252A1 (en) *	1971-03-09	1972-10-20	Sogreah	Paper making machine - has guides bordering filtration screen to limit the width of the web
DE2549726B2 (de) *	1975-11-06	1980-04-17	J.M. Voith Gmbh, 7920 Heidenheim	Maschine zum Herstellen von Faserbahnen
US4738751A (en) *	1985-12-18	1988-04-19	Appleton Specialty Products, Inc.	Fabric edge support apparatus for fourdrinier paper machine
US4968387A (en) *	1990-01-23	1990-11-06	Westvaco Corporation	Papermachine deckle means
JPH03249297A (ja) *	1990-02-26	1991-11-07	Mitsubishi Heavy Ind Ltd	抄紙機ヘッドボックスの流向調整方法
US5302250A (en)	1992-10-09	1994-04-12	Westvaco Corporation	Paper machine deckle flushing fountain

1997
- 1997-08-29 DE DE19737646A patent/DE19737646A1/de not_active Withdrawn
1998
- 1998-08-05 EP EP98114697A patent/EP0899376B1/fr not_active Expired - Lifetime
- 1998-08-05 DE DE59808331T patent/DE59808331D1/de not_active Expired - Lifetime
- 1998-08-27 US US09/141,339 patent/US6214169B1/en not_active Expired - Lifetime

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1681390A1 (fr) *	2005-01-14	2006-07-19	Vaahto OY	Dispositif dans une machine à papier ou à carton de limiter l'écoulement de pâte de la caisse de tête
DE102009000502A1 (de)	2009-01-30	2010-08-05	Voith Patent Gmbh	Blattbildungssystem für eine Maschine zur Herstellung einer Faserstoffbahn
DE102009000497A1 (de)	2009-01-30	2010-08-05	Voith Patent Gmbh	Blattbildungssystem für eine Maschine zur Herstellung einer Faserstoffbahn
WO2011086231A1 (fr) *	2010-01-15	2011-07-21	Metso Paper, Inc.	Dispositif pour une section de formation de film d'une machine de film de fibres
CN102713056A (zh) *	2010-01-15	2012-10-03	美卓造纸机械公司	用于纤维幅材机的幅材成形部的装置
EP2524083A4 (fr) *	2010-01-15	2013-05-29	Metso Paper Inc	Dispositif pour une section de formation de film d'une machine de film de fibres
WO2020030352A1 (fr) *	2018-08-06	2020-02-13	Voith Patent Gmbh	Procédé de réduction d'ondulations de bord dans un système de formation de feuilles et système de formation de feuilles
CN112534097A (zh) *	2018-08-06	2021-03-19	福伊特专利有限公司	在片材成形系统中减少边缘波的方法和片材成形系统
CN112534097B (zh) *	2018-08-06	2023-04-14	福伊特专利有限公司	在片材成形系统中减少边缘波的方法和片材成形系统

Also Published As

Publication number	Publication date
DE59808331D1 (de)	2003-06-18
EP0899376A3 (fr)	1999-11-17
DE19737646A1 (de)	1999-03-04
US6214169B1 (en)	2001-04-10
EP0899376B1 (fr)	2003-05-14

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1999-12-29	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH
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2000-12-20	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: VOITH PAPER PATENT GMBH
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2002-11-06	RTI1	Title (correction)	Free format text: FORMING SECTION HAVING DECKLE FRAME ARRANGEMENT
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Publication	Publication Date	Title
DE3145413C2 (de)	1984-10-04	Vorrichtung zum gleichzeitigen Beschichten von beiden Seiten einer laufenden Bahn
EP0581051B1 (fr)	1995-11-29	Caisse de tête à plusieurs couches pour une machine à papier ou analogue
DE3343941C2 (de)	1986-08-07	Entwässerungsmaschine für Zellstoff, Schlämme oder dergleichen Fasermaterial
DE3321406C2 (fr)	1988-09-08
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DE3630570A1 (de)	1987-03-26	Verfahren und vorrichtung in einem papiermaschinen-zylindertrockner, in dem zweisiebfuehrung angewendet wird
DE2736644C2 (de)	1979-08-23	Stoffauflauf
EP0899376B1 (fr)	2003-05-14	Section de formage avec chariot de format
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