EP2561982B1 - Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung - Google Patents

Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung Download PDF

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Publication number
EP2561982B1
EP2561982B1 EP20110405305 EP11405305A EP2561982B1 EP 2561982 B1 EP2561982 B1 EP 2561982B1 EP 20110405305 EP20110405305 EP 20110405305 EP 11405305 A EP11405305 A EP 11405305A EP 2561982 B1 EP2561982 B1 EP 2561982B1
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EP
European Patent Office
Prior art keywords
installation
rubber blanket
processing
blanket
structured surface
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.)
Not-in-force
Application number
EP20110405305
Other languages
English (en)
French (fr)
Other versions
EP2561982A1 (de
Inventor
Albert Heim
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.)
Clupak AG
Original Assignee
Clupak AG
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 Clupak AG filed Critical Clupak AG
Priority to EP20110405305 priority Critical patent/EP2561982B1/de
Priority to ES11405305.1T priority patent/ES2504972T3/es
Publication of EP2561982A1 publication Critical patent/EP2561982A1/de
Application granted granted Critical
Publication of EP2561982B1 publication Critical patent/EP2561982B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/126—Crêping including making of the paper to be crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/16—Crêping by elastic belts

Definitions

  • the invention concerns an installation for compacting paper and a method of using the same.
  • Such installation is usually part of a paper machine where it provides a web of smooth paper with a microcrepe-like structure as is desirable or required in certain types of paper, in particular, kraft paper for large paper bags as used for transport and storage of powdery and granular materials.
  • the known grinding device comprises two rolls, one drivable by an electric motor and one a pulley, and an abrasive belt guided by the rolls whose abrasive outer surface can be pressed against the outer surface of the rubber blanket while the grinding device moves along a rail which transversally extends along the rubber blanket.
  • a grinding device of this type is rather bulky and heavy.
  • the possibilities of varying the properties of the abrasive belt are limited.
  • Furthermore, there is always a risk of the belt breaking during operation and consequent damage of the rubber blanket which is relatively expensive and whose exchange is time-consuming and not possible without an interruption of the paper making process.
  • a processing wheel with a structured surface which is usually abrasive is used instead of an abrasive belt.
  • the processing wheel has a much longer service life and a sudden break-up resulting in damage to the rubber blanket is unlikely.
  • Towards the end of its service life it will merely become less effective in that its abrasive properties decline. In that case it can be rather easily exchanged and in most cases recoated and put to use again.
  • position and motion of the processing wheel can be controlled with much higher precision.
  • the properties of the processing wheel can be chosen within a wide range.
  • the structured surface can be covered with an abrasive layer similar to those used on an abrasive belt or it can exhibit a rasp-like structure with larger radial extensions but it can also have a metallic surface of almost any structure, coated or not with some extremely hard and wear-resistant material like tungsten carbide. This opens, beside the grinding proper, also indirect ways of influencing the character of the compaction, i.e., of the resulting paper surface which may be optimised for tensile strength, tensile energy absorption, porosity, frictional coefficient and other parameters. Different processing wheels can be used in succession as the exchange of wheels is easy.
  • An installation for compacting paper comprises ( Fig. 1a,b ) blanket carrier rolls 1, 2, 3 of which at least one is drivable and one serves as a tensioning roll and a rubber blanket 4 which forms a closed loop running over the blanket carrier rolls 1, 2, 3 moving in the direction of the arrow 5 at a speed of up to 1200 m/min.
  • An outer guide roll 6 contacts an outside of the rubber blanket 4.
  • a nip bar 7 exerts a force on an inner surface of the rubber blanket 4 directed towards a heated cylinder 8 with a polished surface which is part of a paper machine, such that a paper web 9 consisting of paper with a water content of between 30% and 40% and which moves in the direction of arrow 10 is pinched between an outer surface of the rubber blanket 4 and the circumference of cylinder 8.
  • Two spray tubes 11 and 12 spray the inner surface of the rubber blanket 5 with a fluid, usually water.
  • the rubber blanket 4 moves slightly slower than the cylinder surface and the incoming paper web 9. The latter is therefore somewhat compressed in the direction of its movement and thereby a microcrepe-like structure impressed on it which improves its properties with respect to tensile energy absorption and frictional coefficient.
  • a processing device 13 can be shifted along a rail 14 which runs in a direction transversal to the direction of motion of the rubber blanket 4, preferably parallel to the blanket carrier rolls 1, 2, 3, e.g., by a chain driven by an electric motor.
  • the processing device 13 comprises a processing wheel 15 which in the standard embodiment shown is a grinding wheel.
  • the processing wheel 15 is partially covered by a housing 16 and drivable by an electric motor 17 to rotate about an axis parallel to the rail 14.
  • a pipe 18 arranged just under the processing wheel 15 is part of a suction apparatus.
  • the processing device 13 can be switched in and out of an active state where the processing wheel 15 rotates, driven by electric motor 17, and is in contact with the rubber blanket 4. When it is not in its active state, the electric motor 17 is switched off and the processing wheel 15 is at a distance from the rubber blanket 4.
  • the processing wheel 15 can be moved in and out of contact with the rubber blanket 4 by small clockwise and, respectively, counter-clockwise rotations of the rail 14. The position of the processing wheel 15 can in this way be controlled with great precision.
  • the processing wheel 15 ( Fig. 2a,b ) can have a generally cylindrical shape with a barrel-shaped circumferential abrasive structured surface 19.
  • the latter can have a smooth base densely covered by small grinding teeth as indicated in Figs. 2a ,b.
  • the teeth consist of a very hard and wear-resistant material, e.g., tungsten carbide or steel. Processing wheels of this type are available and have been used for the purpose of roughening rubber conveyor belts and generally processing the surfaces of objects made of rubber and other elastomers.
  • the grinding of the rubber blanket 4 is carried out without interruption of the compacting process in that the processing device 13 is switched to the active state, i.e., the electric motor 17 is switched on and the processing wheel 15 which now rotates in a clockwise direction ( Fig. 1a ) pressed against the outer surface of the rubber blanket 4 at a first edge of the latter. Then the processing device 13 is shifted slowly along the rail 14 to the opposite edge of the rubber blanket 4. The cuttings which are removed from the same during this process are siphoned off into the pipe 18 of the suction apparatus which may be part of the grinding device 13 or a stationary component of the installation connected to the pipe 18 by a flexible hose.
  • processing wheel there are many possibilities. E.g., instead of using a one-piece processing wheel as explained above it is also possible to use a processing wheel consisting of several narrow discs which are aligned along the axis of rotation, one following immediately upon the other.
  • the discs can be equal or different. This allows an even wider range of choices for the properties of the processing wheel 15 which in turn influence, via the rubber blanket 5, the properties of the finished paper.
  • the processing wheel 15 of Fig. 3a,b is a roughening wheel consisting of six equal discs 20.
  • They can consist of a very hard and wear-resistant material like tungsten carbide or of steel in which case they are preferably coated with such material.
  • the circumferential surfaces of the discs 20 form a base partially covered by the blade-like extensions 21 which together provide a very rough rasp-like structured surface 19.
  • the processing wheel 15 can be used to imprint a correspondingly rough surface structure on the rubber blanket 4 which is in turn imparted to the surface of the paper web 9. In this way paper with a high frictional coefficient can be produced.
  • Such paper is particularly suitable for the production of larger bags to be filled with heavy granular material as it reduces the risk of dangerous slides where the filled bags are stored in stacks.
  • the processing wheel may, of course, consist of more or less discs than shown in the example.
  • the discs need not be equal either but may be different, in particular, with respect to the properties of the structured surface.
  • the processing device 15 is used at intervals, that is, whenever it is deemed necessary to adapt the properties of the outer surface of the rubber blanket 4, in particular, to remove an oxide layer which has formed on it by grinding. In many cases it is sufficient that this operation be carried out once a day.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Claims (10)

  1. Anlage zum Verdichten von Papier, welche eine Mehrzahl von um parallele Achsen drehbare Tragwalzen (1, 2, 3) umfasst, von welchen mindestens eine antreibbar ist, einen zu den besagten Achsen parallelen Druckbalken (7), ein Gummituch (4), das eine geschlossene Schleife bildet, die über die Tragwalzen (1, 2, 3) und den Druckbalken (7) läuft, wobei der letztere mit einer Innenseite des Gummituchs (4) in Kontakt ist, wenigstens eine Spritzvorrichtung zum Besprühen der Innenseite des Gummituchs (4) mit einem Fluid und eine Bearbeitungsvorrichtung (13), welche in einen aktiven Zustand und aus demselben schaltbar und in einer Richtung quer zur Bewegungsrichtung des Gummituchs (4) vor- und zurückbewegbar ist, dadurch gekennzeichnet, dass die Bearbeitungsvorrichtung (13) wenigstens ein antreibbares Bearbeitungsrad (15) umfasst mit einer strukturierten Oberfläche (19), die im aktiven Zustand mit der Oberfläche des Gummituchs (4) zur Bearbeitung derselben in Kontakt ist.
  2. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die strukturierte Oberfläche (19) wenigstens einen Teil des Umfangs des Bearbeitungsrades (15) bedeckt und dass dasselbe um eine Achse drehbar ist, die zu den Achsen der Tragwalzen (1, 2, 3) parallel ist.
  3. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die strukturierte Oberfläche (19) mindestens zum Teil von Schleifzähnen bedeckt ist, welche wenigstens einen Teil einer Grundfläche bedecken.
  4. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die strukturierte Oberfläche (19) mindestens zum Teil von klingenartigen Fortsätzen (21) gebildet werden, die wenigstens einen Teil einer Grundfläche bedecken.
  5. Anlage nach Anspruch 4, dadurch gekennzeichnet, dass die klingenartigen Fortsätze (21) normal auf die Achsrichtung ausgerichtet in sich längs der strukturierten Oberfläche (19) erstreckenden Reihen angeordnet sind.
  6. Anlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Bearbeitungsrad (15) aus einer Mehrzahl von längs der Achse aneinandergereihten Scheiben (20) besteht.
  7. Anlage nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Bearbeitungsvorrichtung (13) einen Saugapparat zum Entfernen vom Gummituch (4) abgeschliffener Partikel umfasst mit einem am Umfang des Bearbeitungsrades (15) angeordneten Rohr (18).
  8. Anlage nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass sie eine sich in Querrichtung erstreckende Schiene (14) umfasst, längs welcher die Bearbeitungsvorrichtung (13) verschiebbar ist.
  9. Verfahren zum Gebrauch der Anlage nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Bearbeitungsvorrichtung (13) in Zeitabständen in einer Richtung quer zu dessen Bewegungsrichtung längs des Gummituchs (4) verschoben wird, wobei das Bearbeitungsrad (15) rotiert und seine strukturierte Oberfläche (19) zur Bearbeitung desselben gegen die Aussenfläche des Gummituchs (4) drückt.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Bearbeitung der Aussenfläche in einem Schleifen derselben besteht.
EP20110405305 2011-08-22 2011-08-22 Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung Not-in-force EP2561982B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20110405305 EP2561982B1 (de) 2011-08-22 2011-08-22 Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung
ES11405305.1T ES2504972T3 (es) 2011-08-22 2011-08-22 Una instalación para compactar papel y un método para utilizar la misma

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110405305 EP2561982B1 (de) 2011-08-22 2011-08-22 Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung

Publications (2)

Publication Number Publication Date
EP2561982A1 EP2561982A1 (de) 2013-02-27
EP2561982B1 true EP2561982B1 (de) 2014-08-06

Family

ID=44801987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110405305 Not-in-force EP2561982B1 (de) 2011-08-22 2011-08-22 Anlage zum Verdichten von Papier und Verfahren zu deren Verwendung

Country Status (2)

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EP (1) EP2561982B1 (de)
ES (1) ES2504972T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT527975A1 (de) * 2024-01-30 2025-08-15 Mondi Ag Anlage und Verfahren zur Herstellung von Kraftpapier mit einer Bypassanordnung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109957981A (zh) * 2017-12-25 2019-07-02 福建省青山纸业股份有限公司 一种生产高强高透伸性纸袋纸工艺方法
CH715269A2 (de) 2018-08-23 2020-02-28 Clupak Ag Verfahren zur Herstellung eines Gummituchs.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4981611A (de) * 1972-12-13 1974-08-06
AT402174B (de) 1995-06-21 1997-02-25 Patria Papier & Zellstoff Einrichtung zur aufbringung einer mikrokreppung auf eine papierbahn
US6279211B1 (en) * 2000-05-04 2001-08-28 Milliken & Company Method for continuous conditioning of a blanket for a compressive shrinkage apparatus
DE202006008197U1 (de) * 2006-05-23 2007-09-27 Brückner Trockentechnik GmbH & Co. KG Vorrichtung zum Sanforisieren einer textilen Warenbahn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT527975A1 (de) * 2024-01-30 2025-08-15 Mondi Ag Anlage und Verfahren zur Herstellung von Kraftpapier mit einer Bypassanordnung

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EP2561982A1 (de) 2013-02-27
ES2504972T3 (es) 2014-10-09

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