EP4004280A1 - Unité de presse - Google Patents

Unité de presse

Info

Publication number
EP4004280A1
EP4004280A1 EP20735507.4A EP20735507A EP4004280A1 EP 4004280 A1 EP4004280 A1 EP 4004280A1 EP 20735507 A EP20735507 A EP 20735507A EP 4004280 A1 EP4004280 A1 EP 4004280A1
Authority
EP
European Patent Office
Prior art keywords
press
press roll
roll
shoe
counter
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
Application number
EP20735507.4A
Other languages
German (de)
English (en)
Other versions
EP4004280B1 (fr
EP4004280C0 (fr
Inventor
Christian Schmid
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 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.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP4004280A1 publication Critical patent/EP4004280A1/fr
Application granted granted Critical
Publication of EP4004280B1 publication Critical patent/EP4004280B1/fr
Publication of EP4004280C0 publication Critical patent/EP4004280C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/06—Means for regulating the pressure
    • 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
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip

Definitions

  • Tissue paper machines have, for example, a press roller and a drying cylinder Press unit formed counterpressure roll, in which the press roll is often pivotably mounted on a bearing lever relative to the counterpressure roll, so that the press roll is between an operating position in which the press roll is pressed against the counterpressure roll and an inoperative position by means of at least one adjusting unit acting on the bearing lever, in which the press roller is not pressed against the counter press roller, is movable.
  • the adjustment unit is designed as a hydraulic cylinder.
  • a tissue paper machine of this type is already known from EP 1 925 723 A1, which has a press unit comprising at least one press roller and a counter press roller, the press roller being mounted on a pivotable bearing lever and between an operating position in which the press roller is operated by means of at least one adjusting unit acting on the bearing lever is pressed against the counter press roll, and is movable to an inoperative position in which the press roll is not pressed against the counter press roll.
  • the known machine comprises an adjustment unit with a locking device by means of which the adjustment unit can be mechanically locked in the operating position. If the press roll is to be pivoted from the operating position into the inoperative position, the mechanical locking produced by the locking device can be released again in order to, at a later point in time, when the The press roller is pivoted back into the operating position to be restored.
  • a pressing device in which a paper web runs through two press nips which are formed by two press rolls and a common counter-roll which the paper web together with a felt can run through one after the other.
  • two different felts or dryer fabrics are used as an alternative.
  • the object of the present invention is to create a machine of the type mentioned at the beginning, in which the above-mentioned disadvantages are eliminated, in which, on the one hand, the exact operating position is held without constant application of force to the adjustment unit, while at the same time accessing a complex locking mechanism by means of a locking lever can be dispensed with.
  • the machine according to the invention for setting or processing a material web has a press unit comprising at least one press roller and one counter press roller, the press roller being mounted on a pivotable bearing lever and between an operating position in which the press roller is against the counter press roller by means of at least one adjusting unit acting on the bearing lever is pressed, and an inoperative position in which the press roller is not pressed against the counter press roller, is movable.
  • the machine according to the invention is characterized in that the press unit is a double press unit and that the press roller mounted on the pivotable mounting lever is arranged as a second press roller in the direction of travel of the material web and can be pressed in a press nip to generate a predetermined press pressure.
  • the operating position comprises several operating positions in which each of the press rollers and the counter-press roller are pressed against each other to different degrees, the locking device being designed in such a way that the adjustment unit is mechanically adjustable in each of the different operating positions. It is provided here that the first press roller is also arranged to be pivotable.
  • the second press roll is preferably designed as a shoe press roll. Because the press roll comprises a pressure shoe, it does not require any internal sources of support in order to close the nip between the pressure shoe and the counter roll. According to the invention, the nip is closed by the external lever system, i. H. the pressure applied. The line force of the press nip is also generated by the external lever system, so that the press roller is comparable to a conventional press roller or suction press roller.
  • the pressure shoe can be mounted on a support element or a plurality of support elements. If several individually mounted support elements are provided, these can have different hardnesses, in particular at the two edges in the edge zones, in order to improve the pressing of the press shoe against the counterpressure roller.
  • the counter pressure roller is preferably a Yankee cylinder.
  • the edge areas each have a width of less than 500 mm, preferably less than 300 mm. According to the invention there is the advantage that the pressing system and the movement system of the shoe press are combined in one system. No safety control or monitoring of the line force is required.
  • a shoe press roll controlled according to the invention can be treated like a conventional press roll, with press levers operated by actuators acting on the shoe press roll from the outside; the maximum line load is secured via the oil pressure in the actuators or hydraulic cylinders.
  • No hydraulic zone control of the pressure shoe is required either, a single one is sufficient Lubrication unit for the press sleeve surrounding the pressure shoe.
  • the simple construction of the shoe press roll without an internal adjustment mechanism saves costs.
  • the distance between the shoe press roll and the counter roll can be adjusted as required, while with internal sources of support the stroke through the press cover is limited to a distance of about 20 to 30 mm. This small distance can lead to clothing damage when the counter roll is hot.
  • the press jacket and the press sleeve of the shoe press roll are made possible, while the jacket of the shoe press roll is bulged or deformed by the stroke of an active inner pressure system according to the prior art.
  • Another advantage of the shoe press roll which can be pivoted according to the invention is that when the diameter of the counter roll, for example the Yankee cylinder, changes, there is no change in the nip force.
  • the adjustment mechanism only applies one force, while the position of the shoe press roll is variable and that of the counter roll adapts.
  • the dewatering process can be optimized by rotating the press roll in or against the machine direction.
  • the shoe press roll has a rotatably mounted pressure shoe or a pressure shoe arranged in a flexible connection. It is also advantageous if the shoe press roll, in particular in the edge areas, has a pressure shoe or zones with different degrees of hardness which are divided into a plurality of individually mounted or controllable zones. This makes it possible to precisely follow the contour of the counter press roll, in particular a Yankee cylinder.
  • the shoe press roll has at least one yoke over its length for mounting the pressure shoe.
  • the press shoe is mounted within the shoe press roll on at least one soft, elastically resilient support element which in turn rests on the at least one yoke.
  • the press pressure between the counter press roll and the press shoe can be controlled by means of the mounting lever. Because the press roller is mounted on a soft, elastically resilient and flexible support element, the press shoe can be pressed against the contour of the counter roller, for example one over the entire width, with the same contact pressure
  • Support element are compensated. If the outer surface of the counter roll assumes a convex or concave shape during operation, this change in shape is compensated for by the corresponding deforming support element in such a way that the press shoe always rests against the counter roll with the same contact pressure in the press nip.
  • the pressing pressure is preferably regulated.
  • the humidity and / or the temperature of the material web can preferably be selected as a control variable for determining the pressing pressure.
  • a plurality of support elements arranged next to one another can be provided, which are preferably connected to one another. These can have different hardnesses, in particular at the two edges in edge zones, in order to improve the pressing of the press shoe against the counterpressure roller.
  • the counter pressure roller is preferably a Yankee cylinder.
  • the edge areas each have a width of less than 500 mm, preferably less than 300 mm.
  • a dewatering element in particular a suction box or a suction turning roll, is arranged upstream of the second press roll in the web running direction of the material web.
  • the second press roller has a diameter of at least 750 mm.
  • the press unit comprising the counter press roller is arranged in front of the second press roller in the direction of travel of the material web by a first press roller designed as a suction press roller.
  • drying cylinder in particular a Yankee drying cylinder, or a Yankee cylinder, as the counter press roll.
  • FIG. 1 shows a schematic representation of a shoe press roll which can be used according to the invention
  • FIG. 2 shows a shoe press roll which can be adjusted to a counter roll by means of a mounting lever
  • a shoe press roll 1 for use in a press section of a paper machine or other machine for processing a material web comprises a pressure shoe 2 with a substructure 3.
  • the pressure shoe 2 can be rotated relative to a substructure via a pivot point 4.
  • a flexible connection to the substructure can also be established, for example by means of a specifically weakened material or a plastic.
  • An element 6 represents a connection to at least one yoke arranged in the shoe press roll 1, which yoke serves to increase the stability of the shoe press roll.
  • An arrow 7 shows the possibility of adjusting the shoe press roll 1 via the roll mounting in the machine direction.
  • the shoe press roll 1 (FIG. 2) rests against a counter roll 8 during operation.
  • a material web 9, in particular a paper web, is passed through between the shoe press roll 1 and the counter press roll 8.
  • the material web 9 is guided, for example, over a first (not shown) felt strand or covering strand, while the material web 9 is previously, that is, over a first press roll 11 lying against the counter cylinder 8, and up to the deflection roller 10 is guided over a second (also not shown) felt strand or fabric strand.
  • the shoe press roll 1 thus forms the second press roll which rests against the counter press roll 8.
  • the shoe press roll 1 is mounted on an, for example, L-shaped mounting lever 12 so that it can rotate about its axis of rotation 13.
  • the mounting lever 12 has its axis of rotation 13 mounted on a machine frame (not shown).
  • the shoe press roll 1 can switch between an operating position in which it is pressed against the counter press roll 8, for example a Yankee drying cylinder, and a Inoperative position, in which the shoe press roll 1 is not pressed against the counter press roll 8, are moved.
  • a press nip is formed between the shoe press roll 1 and the counter roll 8, through which the material web 9 is guided.
  • the press roller 11 can also be equipped in a comparable manner with an adjusting mechanism for adjusting the press nip between it and the counter roller 8.
  • a pressure shoe 2 (Fig. 3) in a shoe press roll 1 is equipped with two rotatable elements 15, 16 mounted inside the shoe press roll 1 for equalizing the pressing force, whereby the number of elements 15, 16 can be selected differently.
  • the elements 15, 16 Depending on the direction of force, the elements 15, 16 have different degrees of hardness. This allows different counter forces or softnesses to be realized.
  • By segmenting these elements 15, 16, more or less nip load and thus nip load can be applied in a targeted manner to the nip formed between the pressure shoe 2 formed, for example, from a block of polyurethane and the shoe press roll 1. This is of great interest in particular in the edge regions of the counterpressure roller 8 and the material web 9.
  • Hydraulic rams can also be used within the shoe press roll 1 to apply a uniform contact pressure to the counterpressure roll 8.
  • the hydraulic cylinders can preferably also be attached at a distance of 10 cm from the edge of the shoe press roll 1.
  • a large number of hydraulic cylinders can also be provided as support elements, which for example can be spaced about 10 cm apart.
  • the pressing force can be applied continuously.
  • a large number of pressing elements can be dispensed with.
  • the press roll in particular the shoe press roll 1, has a diameter of 770 mm, for example.
  • a diameter of 1100 mm can be used with sufficient installation space or for wide machines.
  • the shoe press roll 1 can be installed as a conventional shoe press configuration, that is to say with an upstream dewatering element such as a suction box or a suction turning roll.
  • the shoe press roll 1 is used as a second press in a double press unit shown in FIG. 2, due to its compact design with a diameter of 770 mm, as a pivotable unit using a pivot or mounting lever 13.
  • the material web 9 is applied to the counter press roll 8 by a first press roll 11, preferably designed as a suction pressure roll, and is heated by the counter pressure roll 8 designed as a drying cylinder before reaching the second nip formed with the shoe press roll 1 in order to achieve maximum dryness.

Landscapes

  • Paper (AREA)

Abstract

L'invention concerne une machine permettant de fabriquer ou de travailler une bande de matière (9), en particulier une bande de papier, de carton ou de papier à usage sanitaire et domestique, ladite machine comportant une unité de presse comprenant un rouleau de presse (1) et un rouleau de presse homologue (8), le rouleau de presse (1) étant monté sur un levier d'appui (12) pivotant et pouvant se déplacer au moyen d'au moins une unité de déplacement (14) entre une position de fonctionnement, dans laquelle le rouleau de presse (1) est comprimé contre le rouleau de presse homologue (8), et une position d'arrêt, dans laquelle le rouleau de presse (1) n'est pas comprimé contre le rouleau de presse homologue (8), ladite machine se caractérisant en ce que l'unité de presse est une unité de presse à deux pinces et en ce que le rouleau de presse (1) monté sur le levier d'appui (12) pivotant est monté en tant que second rouleau de presse dans la direction de défilement de la bande de matière (9).
EP20735507.4A 2019-07-23 2020-06-24 Unité de presse Active EP4004280B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019119894.1A DE102019119894A1 (de) 2019-07-23 2019-07-23 Presseneinheit
PCT/EP2020/067622 WO2021013454A1 (fr) 2019-07-23 2020-06-24 Unité de presse

Publications (3)

Publication Number Publication Date
EP4004280A1 true EP4004280A1 (fr) 2022-06-01
EP4004280B1 EP4004280B1 (fr) 2026-03-25
EP4004280C0 EP4004280C0 (fr) 2026-03-25

Family

ID=71409371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20735507.4A Active EP4004280B1 (fr) 2019-07-23 2020-06-24 Unité de presse

Country Status (4)

Country Link
EP (1) EP4004280B1 (fr)
CN (1) CN114269987B (fr)
DE (1) DE102019119894A1 (fr)
WO (1) WO2021013454A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019119905A1 (de) * 2019-07-23 2021-01-28 Voith Patent Gmbh Schuhpresse
CN115901467B (zh) * 2022-10-12 2025-09-19 华南理工大学 一种微型压榨实验机

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404946A (en) * 1943-12-03 1946-07-30 Rice Barton Corp Papermaking machine press section
DE1807759A1 (de) * 1968-11-08 1970-05-21 Voith Gmbh J M Walzenpresse,insbesondere Waschpresse fuer einen Papiermaschinenfilz
FI86654C (fi) * 1987-09-15 1992-09-25 Tampella Oy Ab Pressdel foer en pappersmaskin.
DE4216264C2 (de) 1992-05-16 2000-05-25 Voith Sulzer Papiermasch Gmbh Verfahren zum Trocknen und Auflockern einer Papierbahn
DE19514142C1 (de) * 1995-04-15 1996-07-11 Voith Sulzer Papiermasch Gmbh Preßvorrichtung für eine Papiermaschine
JP2006336128A (ja) * 2005-05-31 2006-12-14 Ichikawa Co Ltd 抄紙機のシュープレス機構
DE102006055711A1 (de) * 2006-11-23 2008-05-29 Voith Patent Gmbh Tissuepapiermaschine
DE102007014568A1 (de) * 2007-03-27 2008-10-02 Gapcon Gmbh Verstelleinrichtung für eine Schuhpresswalze
EP2151522A1 (fr) * 2008-08-04 2010-02-10 Voith Patent GmbH Agencement de presse pour machine à papier
DE102010039708A1 (de) * 2010-08-24 2012-03-01 Voith Patent Gmbh Schuhpresswalze für eine Langspaltpresseinrichtung
DE102011004565A1 (de) * 2011-02-23 2012-08-23 Voith Patent Gmbh Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn
FI126727B (fi) * 2012-10-19 2017-04-28 Valmet Technologies Inc Kenkätela, pitkänippipuristin ja kuiturainakone
AT514547B1 (de) * 2013-06-25 2015-02-15 Andritz Ag Maschf Pressenpartie für die Entwässerung einer Faserstoffbahn
DE102014004020A1 (de) * 2014-03-20 2015-09-24 Brückner Maschinenbau GmbH & Co. KG Winkelverstellbare Anpress- oder Nipwalze
DE102014213512A1 (de) * 2014-07-11 2016-01-14 Voith Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn
DE102015223660A1 (de) * 2015-11-30 2017-06-01 Voith Patent Gmbh Vorrichtung und verfahren zur herstellung einer faserstoffbahn
CN205399074U (zh) * 2016-02-19 2016-07-27 江苏理文造纸有限公司 一种用于制造瓦楞纸的节能型脱水装置

Also Published As

Publication number Publication date
CN114269987B (zh) 2025-08-29
EP4004280B1 (fr) 2026-03-25
CN114269987A (zh) 2022-04-01
EP4004280C0 (fr) 2026-03-25
DE102019119894A1 (de) 2021-01-28
WO2021013454A1 (fr) 2021-01-28

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