EP2404746B1 - Schaberhalter für eine Papierbanderzeugende Maschine - Google Patents

Schaberhalter für eine Papierbanderzeugende Maschine Download PDF

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Publication number
EP2404746B1
EP2404746B1 EP20110172578 EP11172578A EP2404746B1 EP 2404746 B1 EP2404746 B1 EP 2404746B1 EP 20110172578 EP20110172578 EP 20110172578 EP 11172578 A EP11172578 A EP 11172578A EP 2404746 B1 EP2404746 B1 EP 2404746B1
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EP
European Patent Office
Prior art keywords
support device
machine
pins
knife
crossbar
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
EP20110172578
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English (en)
French (fr)
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EP2404746A1 (de
Inventor
Piero Pagani
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.)
Oradoc Srl
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Oradoc Srl
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Publication date
Application filed by Oradoc Srl filed Critical Oradoc Srl
Publication of EP2404746A1 publication Critical patent/EP2404746A1/de
Application granted granted Critical
Publication of EP2404746B1 publication Critical patent/EP2404746B1/de
Not-in-force legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/04—Doctors for drying cylinders
    • 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
    • B31F1/14—Crêping by doctor blades arranged crosswise to the web
    • B31F1/145—Blade constructions

Definitions

  • the present invention refers to a support device for the knife of a machine for the production of paper band-like material.
  • drying and desiccation step of the product being processed, normally made of a pulp of paper which is diluted with water.
  • the drying and desiccation step is usually carried out with a drying device comprising a so-called "Yankee" cylinder.
  • This is a cylinder that is heated with steam, having a diameter that can vary from about 1.5 m to about 6 m, consisting of a pressurised container that contains process steam up to about 10 bar G and beyond, inside it.
  • the paper is made to dynamically adhere to the Yankee cylinder so as to make the water in excess evaporate thus completing the desiccation process.
  • the machinery for the production of crepe paper is normally equipped with three distinct knives which operate on the Yankee cylinder.
  • a first knife, or creping knife removes the paper from the Yankee cylinder, giving the paper itself the crepe characteristics.
  • a second knife called removal or cutting knife, is used for removing the paper from the Yankee cylinder while changing the blade of the creping knife.
  • a third knife, or cleaning knife finally has the task of cleaning the surface of the Yankee cylinder from residues left by the creping knife.
  • each knife is normally made up of a blade, which acts directly upon the surface of the Yankee cylinder, and a cutter block mounted on a support crossbar.
  • the support crossbar is capable of swinging around an axis that is substantially parallel to the rotation axis of the Yankee cylinder and rests on a pair of opposing pins, one for each side of the support crossbar itself.
  • Two support bearings, or brasses, support the crossbar and allow them to swing.
  • the support crossbar is usually moved, with respect to the fixed structure of the machinery for producing paper, through levers and pneumatic cylinders.
  • the pneumatic cylinders allow the crossbar to rotate so as to remove the knife from the surface of the Yankee cylinder, for example for operations of replacing the blade or for other maintenance operations.
  • the pneumatic cylinders also provide the torque necessary to press the blade against the surface of the Yankee cylinder.
  • the contact pressure of the blade against the surface of the Yankee cylinder must be calibrated in the best way possible in order to effectively remove the paper and to simultaneously avoid damage to such a surface or the paper itself. This type of damage however, can occur quite frequently in known types of machines for producing paper, requiring the working process to be interrupted which is onerous both in terms of costs, and in terms of time to restore the functionality of the machinery itself.
  • the document DE 44 24 032 C1 describes a creping machine for paper band-like material, in which a plurality of creping knives is mounted on a support device provided with many constraint means with respect to the frame of the machine.
  • the support device is moved through levers and pneumatic cylinders. The support device can thus undergo swinging in a crosswise direction with respect to the rotation axis of the cylinder of the creping machine.
  • the document WO 93/06300 describes another creping machine for paper band-like material, in which the creping knife is mounted on a support device that is provided with a crossbar and with an adjustment slide. Even in this case, the support device can undergo swinging in a crosswise direction with respect to the rotation axis of the cylinder of the creping machine.
  • the purpose of the present invention is therefore that of making a support device for the knife of a machine for the production of paper band-like material that is capable to solve the aforementioned drawbacks of the prior art in an extremely simple, cost effective and particularly functional manner.
  • one purpose of the present invention is that of making a support device for the knife of a machine for the production of paper band-like material which makes it possible for the support device itself to have high functional stability.
  • Another purpose of the invention is that of making a support device for the knife of a machine for the production of paper band-like material that is capable of removing paper from the surface of the Yankee cylinder in a particularly effective manner.
  • Yet another purpose of the invention is that of making a support device for the knife of a machine for the production of paper band-like material that is capable of minimising the possibility of damage of the surface of the Yankee cylinder and of the paper being processed.
  • a detail of a machine for the production of paper band-like material is shown, of the type comprising a so called “Yankee” cylinder, which is able to rotate around its own axis with respect to the fixed structure or frame 12 of the machine itself.
  • the belt of paper is made to dynamically adhere so as to make it dry.
  • One or more knives or cutter blocks 14 ⁇ 18 are placed in contact with the surface 10 of the cylinder. More precisely, it can be foreseen for there to be a creping knife 14, that is capable of removing the paper from the surface 10 of the cylinder so as to give the paper itself the crepe characteristic, a so-called removal or cutting knife 16, to remove the paper from the surface 10 of the cylinder while changing the blade 20 of the creping knife 14, and a cleaning knife 18, which has the task of cleaning the surface 10 of the cylinder from paper residue left by the creping knife 14.
  • a creping knife 14 that is capable of removing the paper from the surface 10 of the cylinder so as to give the paper itself the crepe characteristic
  • a so-called removal or cutting knife 16 to remove the paper from the surface 10 of the cylinder while changing the blade 20 of the creping knife 14
  • a cleaning knife 18 which has the task of cleaning the surface 10 of the cylinder from paper residue left by the creping knife 14.
  • Each knife or cutter block 14 ⁇ 18 is provided with a respective support device 26 ⁇ 30 made of a crossbar which extends according to a direction that is substantially parallel to the rotation axis of the surface 10 of the cylinder.
  • Each crossbar 26 ⁇ 30 preferably has a substantially prismatic shape in cross-section and is connected to the frame 12 of the machine in a mobile or fixed manner.
  • the moving means of each crossbar 26 ⁇ 30 with respect to the frame 12 of the machine can for example consist of levers 32 ⁇ 36 and pneumatic cylinders 38 ⁇ 42.
  • the moving means 32 ⁇ 36 and 38 ⁇ 42 can operate both so as to make each crossbar 26 ⁇ 30 rotate and/or translate, so as to remove the relative knife 14 ⁇ 18 from the surface 10 of the cylinder when, for example, it is necessary for there to be replacement operations of the blade 20 ⁇ 24 or other maintenance operations, and to provide the torque necessary to press the blade 20 ⁇ 24 against the surface 10 of the cylinder.
  • each support device or crossbar 26 ⁇ 30 is provided with constraint means with respect to the frame 12 of the machine which extend along at least two distinct axes A-A and B-B, parallel to each other and to the rotation axis of the cylinder.
  • constraint means are each mounted on respective support bearings 50, 52 that are fixedly attached to the frame 12 of the machine.
  • the support bearings 50, 52 prevent swinging, in a crosswise direction, with reference to the rotation axis of the cylinder, of the constraint means which extend along such axes A-A and B-B parallel to each other.
  • Such support bearings 50, 52 which differentiate the invention from all of the known embodiments, have the purpose of dividing the entire reaction to the stress between themselves, at the same time widening the support and reaction base.
  • the crossbar 26 that supports a creping knife 14 is shown.
  • the creping knife 14 is that which requires the greatest rigidity possible with respect to the cylinder, compatibly with the possibility of rotation of the respective crossbar 26.
  • the constraint means of such a crossbar 26 with respect to the frame 12 are thus made of, for each side of the crossbar 26 itself, a pair of pins 44 and 46 which extend along respective axes A-A and B-B parallel to each other, as highlighted in figure 3 .
  • the two pins 44 and 46 can provide a reaction torque that is sufficient for the purpose required by the creping process.
  • the two pins 44 and 46 indeed make it possible to widen the reaction base of the effort of the creping, as well as to provide the reaction torque that is normally transmitted by the levers 32 ⁇ 36.
  • the crossbar 26 can thus be equipped with any type of moving means with respect to the frame 12 of the machine, not necessarily provided with such levers 32 ⁇ 36.
  • Figures 5 and 6 respectively show the crossbar 26 that supports a creping knife 14 of the rigid type and the crossbar 30 that supports a cleaning knife 18, also of the rigid type.
  • the load on the blade 20 of the creping knife 14 is generated by applying a predetermined force through the moving means, made up of, for example, a pneumatic cylinder, a hydraulic cylinder or a mechanical actuator, of the crossbar 26.
  • the predetermined force can be applied on one of the two pins of the crossbar 26, for example on the pin 44, along an arc of circumference C having centre in the rotation axis of the second pin 46.
  • the crossbar 26 is able to rotate around the axis defined by the second pin 46, whereas the first pin 44, mobile with circular motion along the arc C, is in any case supported by a constraint in the form of a bracket that is compatible with the required movement.
  • the same type of circular movement is of course possible for the second pin 46 with respect to the rotation axis of the first pin 44, as shown for example in figure 6 .
  • a second embodiment of the support device is shown according to the invention, applied as an example to the crossbar 30 that supports a cleaning knife 18.
  • the constraint means of such a crossbar 30 with respect to the frame 12 are in this case made up of, for each side of the crossbar 26 itself, a single pin 48 being elongated-shaped in section, that is not circular, so as to extend longitudinally between a pair of axes A-A and B-B that are parallel to each other.
  • the pin 48 can carry out the same movements, in terms of translation and/or rotation, as the system with two pins 44 and 46 previously described. Even in this case the pin 48 is provided with a respective support bearing (not shown) that is fixedly attached to the frame 12 of the machine. The supports and the brackets of the pin 48 are made so as to carry out the displacements foreseen for the respective cutter block 14 ⁇ 18.
  • the pin 48 can have, for example, an elliptical section, rectangular section, or a section with any other shape obtained by the meeting of the two distinct pins which extend along respective axes A-A and B-B that are parallel to each other.
  • pins 44 and 46 can both be mobile with respect to the fixed structure 12 of the machine, or both be fixed, or furthermore one mobile and one fixed.
  • the single pin 48 with an elongated shape can in turn be mobile or fixed with respect to the frame 12 of the machine.
  • the translation direction of the constraint pins 44, 46 and 48 with respect to the machine can be any (circular, linear, elliptical, following a plurality of different directions, etc.).
  • the constraint pins 44, 46 and 48 can be mobile both during assembly and during adjustment of the machine, both for reasons related to the operation of the machine itself, that is to say mobile during the normal functionality and without limitations with respect to the operation step, during which they can be rotated and/or translated.
  • the constraint pins 44, 46 and 48 can also be mobile along the direction of the axes A-A and B-B, so as to make the support devices 26 ⁇ 30 able to swing in an axial direction with respect to the surface 10 of the cylinder.
  • the swinging system can be independent, or integrated into the moving means (translation and/or rotation) of the constraint pins 44, 46 and 48.
  • the support bearings 50, 52 which constrain the pins 44, 46 and 48 to the frame 12 of the machine can be of any type, like for example, ball bearings, roller bearings, bushings or bushes of any type and form.
  • the pins 44, 46 and 48 can be fixed to the respective crossbar 26 ⁇ 30 in an irremovable manner, through for example welding or fitting with interference created by heating or cooling of a part, or in a removable manner, through for example screws or another system of reversible mechanical connection.
  • the control of the moving means of the pins 44, 46 and 48 can be of any type and origin, like for example mechanical, hydraulic, electrical, electronic, etc.
  • the support device for the knife of a machine for the production of paper band-like material of the present invention thus conceived can in any case undergo numerous modifications and variants, all covered by the same inventive concept; moreover, all the details can be replaced by technically equivalent elements.
  • the materials used, as well as the shapes and sizes, can be any according to the technical requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (10)

  1. Haltevorrichtung (26; 28; 30) für die Klinge (14; 16; 18) einer Maschine für die Herstellung von papierbandartigem Material des Typs, der eine zylindrische Oberfläche (10) umfasst, die sich in Bezug auf eine feste Konstruktion (12) der Maschine drehen kann, wobei die Klinge (14; 16; 18) in Kontakt mit der zylindrischen Oberfläche (10) angeordnet ist, um mit dem papierbandartigen Material zu interagieren, wobei die Haltevorrichtung (26; 28; 30) aus einem Querbalken besteht, der sich in einer im Wesentlichen zur Drehachse der zylindrischen Oberfläche (10) parallelen Richtung erstreckt und mit der festen Konstruktion (12) der Maschine verbunden ist, wobei dieser Querbalken (26; 28; 30) mit Befestigungsmitteln in Bezug auf die feste Konstruktion (12) der Maschine versehen ist, die sich entlang von mindestens zwei verschiedenen Achsen (A-A, B-B) erstrecken, die zueinander und zur Drehachse der zylindrischen Oberfläche (10) parallel sind, dadurch gekennzeichnet, dass jedes dieser Befestigungsmittel auf jeweilige Stützlager (50, 52) montiert ist, die starr an der festen Konstruktion (12) der Maschine befestigt sind, wobei diese Stützlager (50, 52) ein Schwingen in einer Querrichtung zur Drehachse der zylindrischen Oberfläche (10) der Befestigungsmittel verhindern, die sich entlang der verschiedenen Achsen (A-A, B-B) erstrecken, die parallel zueinander sind, wobei die Befestigungsmittel jedes Querbalkens (26; 28; 30) mit Bezug auf die feste Konstruktion (12) der Maschine aus zwei Bolzen (44, 46) für jede Seite des Querbalkens (26; 28; 30) bestehen, wobei sich diese zwei Bolzen (44, 46) jeweils entlang zweier verschiedener Achsen (A-A, B-B) erstrecken, die parallel zueinander sind.
  2. Haltevorrichtung (26; 28; 30) nach Anspruch 1, dadurch gekennzeichnet, dass mindestens einer der Bolzen (44, 46; 48) gegenüber der festen Konstruktion (12) der Maschine beweglich ist, um den Querbalken (26; 28; 30) gegenüber der zylindrischen Oberfläche (10) zu bewegen.
  3. Haltevorrichtung (26; 28; 30) nach Anspruch 2, dadurch gekennzeichnet, dass die Bewegung der Bolzen (44, 46; 48) durch Bewegungsmittel (32; 34; 36) ins Werk gesetzt wird, die auch das erforderliche Drehmoment bereitstellen können, um die Klinge (14; 16; 18) gegen die zylindrische Oberfläche (10) zu pressen.
  4. Haltevorrichtung (26; 28; 30) nach Anspruch 3, dadurch gekennzeichnet, dass die Bolzen (44, 46; 48) entlang der Richtung der zueinander parallelen Achsen (A-A, B-B) beweglich sind, um die Haltevorrichtung (26; 28; 30) axial zur zylindrischen Oberfläche (10) schwingen zu lassen.
  5. Haltevorrichtung (26; 28; 30) nach Anspruch 4, dadurch gekennzeichnet, dass das Schwingsystem der Bolzen (44, 46; 48) in die Bewegungsmittel (32; 34; 36) integriert ist.
  6. Haltevorrichtung (26; 28; 30) nach einem der Ansprüche von 3 bis 5, dadurch gekennzeichnet, dass sie einen kinematischen Mechanismus umfasst, der geeignet ist, um den Anstellwinkel der Klinge (14; 16; 18) auf der zylindrischen Oberfläche (10) zu verändern.
  7. Haltevorrichtung (26; 28; 30) nach Anspruch 6, dadurch gekennzeichnet, dass der kinematische Mechanismus in die Bewegungsmittel (32; 34; 36) integriert ist.
  8. Haltevorrichtung (26; 28; 30) nach einem der Ansprüche von 1 bis 7, dadurch gekennzeichnet, dass die Bolzen (44, 46; 48) starr an der festen Konstruktion (12) der Maschine befestigt sind.
  9. Haltevorrichtung (26; 28; 30) nach einem der Ansprüche von 1 bis 8, dadurch gekennzeichnet, dass die Bolzen (44, 46; 48) unlösbar an der Haltevorrichtung (26; 28; 30) befestigt sind.
  10. Haltevorrichtung (26; 28; 30) nach einem der Ansprüche von 1 bis 8, dadurch gekennzeichnet, dass die Bolzen (44, 46; 48) lösbar an der Haltevorrichtung (26; 28; 30) befestigt sind.
EP20110172578 2010-07-05 2011-07-04 Schaberhalter für eine Papierbanderzeugende Maschine Not-in-force EP2404746B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A001229A IT1401112B1 (it) 2010-07-05 2010-07-05 Dispositivo di supporto per il coltello di una macchina per la produzione di materiale cartaceo nastriforme

Publications (2)

Publication Number Publication Date
EP2404746A1 EP2404746A1 (de) 2012-01-11
EP2404746B1 true EP2404746B1 (de) 2013-11-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110172578 Not-in-force EP2404746B1 (de) 2010-07-05 2011-07-04 Schaberhalter für eine Papierbanderzeugende Maschine

Country Status (3)

Country Link
EP (1) EP2404746B1 (de)
ES (1) ES2446371T3 (de)
IT (1) IT1401112B1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469035B (sv) * 1991-09-16 1993-05-03 Valmet Karlstad Ab Foerfarande och anordning foer justering av kraeppningsbetingelserna
DE4424032C1 (de) * 1994-07-11 1995-12-07 Johannes Prof Dr Rer N Gartzen Vorrichtung zur Herstellung von Kreppapier
ES2288120B1 (es) * 2006-05-25 2008-10-16 Jose Joaquin Amonarriz Azcolain Procedimiento e instalacion de crepado y corte.

Also Published As

Publication number Publication date
ITMI20101229A1 (it) 2012-01-06
EP2404746A1 (de) 2012-01-11
IT1401112B1 (it) 2013-07-12
ES2446371T3 (es) 2014-03-07

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