EP1734181B1 - Vorrichtung zum Halten einer Rakel - Google Patents

Vorrichtung zum Halten einer Rakel Download PDF

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Publication number
EP1734181B1
EP1734181B1 EP06009181A EP06009181A EP1734181B1 EP 1734181 B1 EP1734181 B1 EP 1734181B1 EP 06009181 A EP06009181 A EP 06009181A EP 06009181 A EP06009181 A EP 06009181A EP 1734181 B1 EP1734181 B1 EP 1734181B1
Authority
EP
European Patent Office
Prior art keywords
cover plate
bearing
pivot
blocks
doctor blade
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.)
Active
Application number
EP06009181A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1734181A1 (de
Inventor
Joachim Knopp
Peter Mau
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.)
Joh Clouth GmbH and Co KG
Original Assignee
Joh Clouth GmbH and Co KG
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 Joh Clouth GmbH and Co KG filed Critical Joh Clouth GmbH and Co KG
Priority to PL06009181T priority Critical patent/PL1734181T3/pl
Publication of EP1734181A1 publication Critical patent/EP1734181A1/de
Application granted granted Critical
Publication of EP1734181B1 publication Critical patent/EP1734181B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes

Definitions

  • the invention relates to a device for holding a doctor blade with a bottom plate and a cover plate, wherein the bottom plate and the cover plate are pivotally connected to each other via a pivot bearing, and wherein retaining fingers are provided for attaching the doctor blade to the cover plate.
  • Scrapers which are also referred to as doctoring, have the task of cleaning the surface of a roller, or a cylinder.
  • a doctor blade causes the In the event of a web break, the paper web guided over the relevant roll of the paper machine does not wind up on the roll, but instead leaves the roll at the predetermined location in order, for example, to reach a collecting chute.
  • This task must be guaranteed by the squeegee with 100% certainty, since otherwise it can lead to considerable disruptions in papermaking and possibly even damage to the paper machine.
  • the doctor also has the task of cleaning the surface of the roller, so that the paper web is not marked. For this reason, the doctor must rest in their holding device as evenly as possible over its entire length on the roller.
  • the holding device is usually constructed in two parts and has a bottom plate, which is usually rigidly attached to the machine frame. At this bottom plate a cover plate is pivotally mounted so that the doctor blade can be lifted from the roll surface or placed on this and pressed.
  • the holding devices become relatively heavily soiled, so that they have to be cleaned frequently.
  • the cover plate must be removed from the bottom plate, so that the holding device can be opened.
  • a doctor blade holder has become known in which the bottom plate has a bearing tube about which the cover plate is pivotally mounted. To open this holding device, the cover plate is removed in the axial direction of the bearing tube, so that the interior is accessible.
  • the squeegee support must also be of that length and it has been found that with such a length, the frictional forces along the bearing tube are relatively large, so that the cover plate can be removed or pushed only with difficulty.
  • a free space of at least the length of the roller must exist in addition to the roller, so that the cover plate can be removed without tilting.
  • the invention has for its object to provide a device for holding doctor blades, which can be cleaned more easily.
  • the pivot bearing is a pin hinge and has a plurality of bearing blocks and associated journal blocks.
  • the design of the pivot bearing as a journal hinge has the significant advantage that the entire pivot axis is formed by a plurality of mutually aligned pins, which are arranged at a distance from each other. These pins protrude from trestles and engage in bearing blocks. To open the holding device, the cover plate must be moved relative to the bottom plate by an amount corresponding to the pin length. Then the pins are pushed out of the bearing blocks and the cover plate can be lifted. On the one hand, this has the advantage that, in addition to the paper roll, not so much space is required to be able to push out the cover plate over its entire length. In addition, the thrust forces are much lower, since only on the short pin length a shift must be made.
  • the bearing blocks on the bottom plate and the trunnions are attached to the cover plate.
  • the attachment is by means of screws, but it can also be a glued or riveted joint.
  • the bearing blocks are on the cover plate and the trunnions on the bottom plate.
  • both bearing blocks and trunnions are provided both on the cover plate and on the bottom plate.
  • the arrangement of the bearing blocks and trunnions can form a specific code, so that the cover plate of a particular holding device can be attached only to the bottom plate of this holding device. Permutations are excluded.
  • the bearing block has a through hole.
  • the bearing block can be provided with a blind hole, but a through hole is preferred because this can not be clogged with dirt. In addition, a cleaning of a through hole is much easier.
  • the receiving opening of the bearing block widens conically in the edge region.
  • the pin can be inserted much easier into the bearing block, or finds the pin easier the receiving opening.
  • the pin of the trunnion may have a tapered tip.
  • At least one bearing block is provided, in which the pin of the trunnion is locked.
  • the bearing block has a ball catch and the pin has a circumferential groove. After the pin has been inserted in the bearing block, the ball catch engages in the circumferential groove of the pin and holds it firmly. The pin can only be removed from the bearing block when the withdrawal force is so high that the ball catch is pushed out of the circumferential groove.
  • the pin is connected via a positive connection, e.g. a grub screw or the like fixed in the bearing block.
  • Low pivoting forces can be achieved in that the bearing block and the pin form a metal-plastic mating.
  • the plastic may be additionally mixed with lubricant, so that the frictional forces are further reduced.
  • FIG. 1 shows a generally designated 10 holding device with a bottom plate 12 and a cover plate 14.
  • On the cover plate 14 holding fingers 16 are provided with which a doctor blade 18 is held and pressed against the surface 20 of a roller 22.
  • the gap 24 between the bottom plate 12 and the cover plate 14 is sealed at the roller 20 facing the front by means of a seal 26 and at the opposite back by means of another spring plate 28.
  • the seal 26 may be formed as a spring plate, plastic strip or as a flexible elastomeric strip.
  • Within the space 24 is at least one inflatable pressure hose 30, with which the cover plate 14 is pressurized, so that the doctor blade 18 is pressed onto the surface 20 by the cover plate 14 is pivoted about an axis 32 with respect to the bottom plate 12.
  • the provision is effected by a further pressure hose 54, a sponge rubber strip or by spring elements.
  • FIG. 2 shows a plan view of the inner side 38 of the cover plate 14, on which the retaining fingers 16 and the trunnions 36 are fastened. From each trunnion 36 protrudes a pin 40 with a conical tip 44 in the direction of the axis 32, wherein the cover plate 14 is equipped with a plurality of such trunnions 36.
  • FIG 3 shows a plan view of the inside 42 of the bottom plate 12 and there are two bearing blocks 34 can be seen. These bearing blocks 34 have receiving openings 46 for receiving the pins 40. These receiving openings 46 can also be formed as through holes and widen conically in the insertion area.
  • the mounting position is shown, in which the cover plate 14 is fixed to the bottom plate 12 by the pin 40 of each trunnion 36 is inserted into the associated bearing block 34.
  • the pressure hose 30 is not shown.
  • a ball catch 48 is indicated, in which a ball 52 engages in a circumferential groove 50 of the pin 40 when the pin 40 is inserted into the receiving opening 46.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Rotary Presses (AREA)
  • Screen Printers (AREA)
  • Clamps And Clips (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Valve Device For Special Equipments (AREA)
EP06009181A 2005-06-16 2006-05-04 Vorrichtung zum Halten einer Rakel Active EP1734181B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06009181T PL1734181T3 (pl) 2005-06-16 2006-05-04 Urządzenie do utrzymywania ostrza przecieraka

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005028795A DE102005028795B3 (de) 2005-06-16 2005-06-16 Vorrichtung zum Halten einer Rakel

Publications (2)

Publication Number Publication Date
EP1734181A1 EP1734181A1 (de) 2006-12-20
EP1734181B1 true EP1734181B1 (de) 2007-12-26

Family

ID=36947534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06009181A Active EP1734181B1 (de) 2005-06-16 2006-05-04 Vorrichtung zum Halten einer Rakel

Country Status (7)

Country Link
EP (1) EP1734181B1 (pt)
AT (1) ATE382108T1 (pt)
DE (2) DE102005028795B3 (pt)
DK (1) DK1734181T3 (pt)
ES (1) ES2297784T3 (pt)
PL (1) PL1734181T3 (pt)
PT (1) PT1734181E (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029091A1 (de) 2008-06-20 2009-12-24 Joh. Clouth Gmbh & Co. Kg Schaberklingenhaltevorrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022096A1 (en) 2006-08-16 2008-02-21 Kadant Web Systems, Inc. Doctor blade holder permitting efficient assembly of doctor assemblies and replacement of doctor blades
ATE521756T1 (de) * 2007-12-06 2011-09-15 Kadant Inc Rakelhalter
DE102011081927A1 (de) 2011-08-31 2013-02-28 Joh. Clouth Gmbh & Co. Kg Vorrichtung zum Halten von Rakeln
CN103977926B (zh) * 2014-01-21 2016-04-06 义乌市易开盖实业公司 一种易开盖铆钉补涂装置及其补涂方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113890A (en) * 1961-06-26 1963-12-10 Kimberly Clark Co Apparatus for smoothing coating materials on a paper web
GB9208003D0 (en) * 1992-04-10 1992-05-27 Vickerys Ltd A mounting assembly
US6139638A (en) * 1998-01-27 2000-10-31 Thermo Web Systems, Inc. Fluid assisted doctor
DE10251983A1 (de) * 2002-11-08 2004-05-19 Helmut Strauch Schaberklingenhaltevorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029091A1 (de) 2008-06-20 2009-12-24 Joh. Clouth Gmbh & Co. Kg Schaberklingenhaltevorrichtung
EP2141284A2 (de) 2008-06-20 2010-01-06 Joh. Clouth GmbH & Co. KG Schaberklingenhaltevorrichtung

Also Published As

Publication number Publication date
ES2297784T3 (es) 2008-05-01
DE502006000234D1 (de) 2008-02-07
PT1734181E (pt) 2008-01-18
EP1734181A1 (de) 2006-12-20
DK1734181T3 (da) 2008-04-28
DE102005028795B3 (de) 2006-11-30
ATE382108T1 (de) 2008-01-15
PL1734181T3 (pl) 2008-03-31

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