EP2002052B1 - Dispositif de maintien de lame de racloir avec porte-lame de racloir - Google Patents

Dispositif de maintien de lame de racloir avec porte-lame de racloir Download PDF

Info

Publication number
EP2002052B1
EP2002052B1 EP07727094A EP07727094A EP2002052B1 EP 2002052 B1 EP2002052 B1 EP 2002052B1 EP 07727094 A EP07727094 A EP 07727094A EP 07727094 A EP07727094 A EP 07727094A EP 2002052 B1 EP2002052 B1 EP 2002052B1
Authority
EP
European Patent Office
Prior art keywords
scraper blade
blade
doctor blade
holding device
doctor
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
EP07727094A
Other languages
German (de)
English (en)
Other versions
EP2002052A1 (fr
Inventor
Helmut Strauch
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
Publication of EP2002052A1 publication Critical patent/EP2002052A1/fr
Application granted granted Critical
Publication of EP2002052B1 publication Critical patent/EP2002052B1/fr
Not-in-force 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 doctor blade holding device, which has a receiving unit which is provided for receiving a scraper blade.
  • Such a doctor blade holding device can be used, for example, in a paper mill in papermaking or in the steel industry. It usually serves to receive a scraper blade for the purpose of uniform contact of the same with a rotating roller in order to clean its surface during operation.
  • a roller may have a diameter of, for example, 1 m-6 m and a length of up to 10 m.
  • the scraper blade provided for cleaning such a roller must rest over the entire length of the roller as uniformly as possible at a predetermined angle to the roller.
  • the doctor blade is generally applied to the roll at a line pressure of between 100 and 400 Newtons per meter.
  • a conventional scraper blade has a length of up to 10 m, a width of 7.5 cm and a thickness of 1.5 mm.
  • a conventional doctor blade is made of carbon fiber material.
  • the scraper blade During operation of the scraper blade, the area of the scraper blade resting against the roller is more and more ground, so that the remaining width of the scraper blade is increasingly reduced. If the scraper blade has reached a width of, for example, 6.5 cm, then it is considered to be used up and is replaced by a new scraper blade.
  • the doctor blade consists of an interchangeable blade, which is pressed in operation directly to the surface of a roller, and a holding blade, which forms a support for the interchangeable blade.
  • the interchangeable blade is an endless blade wound on a roll which, in use, is applied to the surface of the rotating roll and the other end is wound on a take-up roll. In each case, a portion of the endless blade with the roll surface in contact. If this portion is worn, then the endless blade can be further rolled up, so that a new portion of the endless blade can be contacted with the roll surface.
  • the object of the invention is to show a way in which the costs of cleaning the surface of a rotating roller can be reduced.
  • the advantages of the invention are, in particular, that because of the use of an additional scraper-blade carrier, scraper blades with a smaller width can be used.
  • a scraper blade carrier a material is used which is much less expensive than the material of which a scraper blade is made, and since scrapers with a smaller width can be used, the cost of cleaning the surface of a rotating roller becomes clear in comparison with the prior art reduced.
  • the scraper blade carrier according to the invention is preferably formed in one of its end regions as well as a conventional scraper blade and is inserted with this end portion in the receiving unit of the Shuberklingenhaltevorraum.
  • fastening means for a doctor blade are provided in the region of the doctor blade carrier protruding from the receiving unit.
  • a scraper blade is used, which may have a much smaller width compared to the prior art, for example 3 - 4 cm. For example, about 2 to 3 cm of this scraper blade project beyond the end of the scraper blade carrier in the direction of the roller to be processed.
  • the scraper blade carrier according to the invention which is inserted into the receiving unit of the doctor blade holding device, can also be used in connection with the new doctor blade in the case of a replacement of a scraper blade.
  • the fastening means by means of which the scraper blade is attached to the doctor blade carrier, have a fixing strip and a fixing spring connected to the fixing strip. This allows a simple and quick withdrawal of a spent doctor blade from the doctor blade holder and a simple and fast insertion of a new doctor blade in the doctor blade holder. Especially This extraction and insertion can be done without the use of tools.
  • the doctor blade carrier is provided with bores and the fastening means are connected to the doctor blade carrier by means of screws guided through the bores, the sufficiently fixed fixation of the doctor blade required for the cleaning operation is ensured. On the other hand, if necessary, the screws can be loosened and the fasteners removed from the doctor blade carrier, for example for the purpose of replacement or cleaning.
  • a welding of the fastener with the Schaberklingen has the advantage of ensuring a sufficiently firm fixation of the doctor blade with reduced expenditure of time for the attachment of the fastener on Schaberklingenotwithstanding, but does not allow subsequent removal of the fastener from Schaberklingendozens.
  • the doctor blade can be inserted in a simple manner between the fixing strip and the doctor blade carrier until it rests on the fixing strip.
  • the individual components of the fastening means are made of stainless steel, whereby a long-term use is ensured during operation.
  • doctor blade holding device is based on a doctor blade holding device, as shown in the WO 2004/042143 is described. It has a base plate 6 which is substantially U-shaped and has two short and one long Begrenzüngswand. In the end of one of the short boundary walls, a bearing tube 5 is arranged, which is part of the base plate. The bearing tube 5 is mounted within a slotted square tube 4 and rotatable about a small angle to this.
  • the square tube 4 may be constructed segment-shaped in the direction perpendicular to the plane to affect the elasticity of the cover plate 2 as little as possible.
  • the square tube is firmly connected to the cover plate 2, preferably by means of a plurality of screw connections, which are arranged perpendicular to the plane one behind the other, but are not shown in the drawing.
  • the cover plate 2 is preferably made of carbon fiber material and may have a plurality of carbon fiber layers. As a result, the cover plate is flexible and can adapt well to the surface of each roller to be cleaned.
  • finger devices 3 are fastened to the cover plate by means of screw connections 3 a, which are also arranged one behind the other perpendicular to the plane of the drawing.
  • a scraper blade carrier 8 is used in contrast to the prior art.
  • This introduction of the doctor blade carrier is preferably carried out by insertion in the axial direction, ie in a direction perpendicular to the plane of the drawing.
  • the back area the doctor blade carrier is formed as well as the rear portion of a conventional doctor blade, so that no structural changes of the receiving unit are necessary to accommodate a Schaberklingenanii invention instead of a conventional doctor blade can. Since the rear portion of the doctor blade carrier 8 is provided with a rivet or spring 15, the doctor blade carrier 8 can not be pulled out in the direction of the roller to be cleaned during operation of the device.
  • fastening means 10, 11, 12 for a doctor blade 1 In its protruding from the receiving unit 2.3 area of the truss blade carrier 8 is provided with fastening means 10, 11, 12 for a doctor blade 1. These fasteners include an angularly shaped fixing strip 11, a fixation associated with the fixing bar 12 and screws 10. These screws are passed through holes 13 of the Schaberklingenarmes 8 and screwed into an internal thread of the angle-shaped fixing strip 11 to this fixing strip 11 fixed to the Schaberklingenarme 8 to connect.
  • the fixing spring 12 forms either together with the fixing strip 11 is a one-piece component or is welded to the fixing strip.
  • the fixing spring is provided to press a scraper blade 1 inserted between the front end area of the scraper blade carrier 8 and the fixing unit 11 against the scraper blade carrier 8 so that the scraper blade 1 has the required fixed positioning at a predetermined angle relative to the roller to be cleaned during the cleaning operation of the roller ,
  • the fixing strip 11 can also be welded to the Schaberklingenucc 8.
  • the doctor blade carrier 8, the fixing strip 11 and the fixing spring 12 made of stainless steel, so that a long-term use of these components is ensured.
  • the doctor blade carrier 8 has, for example, a length of up to 10 m, a width of 5 cm and a thickness of 1.5 mm. It is resilient, so that diameter deviations of the roller can be compensated.
  • the length of the doctor blade carrier extends in the axial direction of the roller or perpendicular to the plane of the drawing.
  • the width b of the doctor blade carrier and the thickness d of the doctor blade carrier are marked in FIG.
  • the scraper blade 1 fastened to the scraper blade carrier 8 by means of the fastening means 10, 11, 12 can have a substantially smaller width than the scraper blades known from the prior art.
  • the doctor blades known from the prior art have, for example, a width of 7.5 cm, as already explained above.
  • the back or bottom of these known doctor blades is inserted directly into the receiving unit of the known doctor blade holder. Since, after a successful during the cleaning operation grinding the doctor blade to about 1 cm, ie when reaching a width of about 6.5 cm, the doctor blade is considered to be consumed and disposed of, must in the prior art, a relatively large part of the doctor blade be disposed of. This procedure is costly and does not spare the environmental resources.
  • a doctor blade whose width is, for example, only 3.5 cm can be used.
  • the underside of this doctor blade is not inserted into the receiving unit of the doctor blade holding device, but fastened by means of fastening means on a Schaberklingenarme, which in turn is inserted into the receiving unit of the doctor blade holder.
  • the scraper wearer can also after a replacement of a consumed Scraper blade can be reused.
  • the scraper blade used in the invention is ground in operation as well as a known scraper blade by about 1 cm and then considered to be used up and replaced with a new doctor blade.
  • the part of the spent doctor blade has to be disposed in this embodiment only has a width of about 2.5 cm, so that in comparison to the prior art much less doctor blade material must be disposed of.
  • a pneumatic air hose 14 is provided in the interior of the U-shaped base plate 6. This is provided at its one end with an air connection, through which air can be pressed into the hose and also air from the hose can be omitted. The other end of the tube 14 is closed. Between the tube 14 and the long boundary wall of the U-shaped base plate 6, a plastic insert 7 is provided. This is loosely inserted, glued or screwed on the inside of the base plate and prevents the hose 14 comes into contact with a possibly hot boundary wall during operation of the device.
  • a first spring plate 16 one end of which at the Base plate 6 is fixed, for example, welded.
  • the other end region of the spring plate 16 is supported on the cover plate 2.
  • the spring plate 16 serves inter alia as dust protection, so that no dust can penetrate into the slot of the slotted square tubes 4.
  • a second spring plate 18 is secured to the cover plate 2 by means of a screw or rivet connection 20, which bridges the area between the end of the boundary wall 9 of the base plate 6 and the cover plate 2 and on the outside of the Boundary wall 9 of the base plate 6 is supported.
  • This spring plate 18 also serves as dust protection or dirt seal.
  • the spring plate 18 slides both in an increase as well as a decrease in the air pressure in the hose 14 on the outer surface of the boundary wall 9 along.
  • an adapter bar 17 is firmly connected, for example using screws 21.
  • This adapter bar 17 is on the remote from the cover plate 2 Outside of the spring plate 16 and the base plate 6 is positioned.
  • FIG. 1 is shown after all a scraper blade holding device, in which the pivoting plane of the doctor blade holding device is formed and arranged in a special way.
  • the in the FIG. 1 Schaberklingenhaltevoriques shown requires only an air hose, since the bringing about the starting position of the cover plate is effected by the force of the spring plate 16.
  • this forms from the base plate 6, the spring plate 18, a part of the cover plate 2, the square tube. 4 and the spring plate 16 formed a substantially dustproof unit system.

Landscapes

  • Paper (AREA)
  • Cleaning In General (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Coating With Molten Metal (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Claims (10)

  1. Dispositif de maintien de lame de racloir, qui comprend une unité réceptrice (2, 3) dans laquelle un porte-lame (8) est mis en place, lequel comprend, dans sa régions dépassant hors de l'unité réceptrice, des moyens de fixation (10, 11, 12) pour une lame de racloir, et les moyens de fixation comprennent une barrette de fixation (11),
    caractérisé en ce que les moyens de fixation comprennent en outre un ressort de fixation (12) relié à la barrette de fixation.
  2. Dispositif de maintien de lame de racloir selon la revendication 1, caractérisé en ce que le porte-lame (8) est pourvu de perçages (13), et la barrette de fixation est reliée au porte-lame (8) au moyen de vis (10) passées à travers les perçages.
  3. Dispositif de maintien de lame de racloir selon la revendication 1, caractérisé en ce que la barrette de fixation est soudée avec le porte-lame (8).
  4. Dispositif de maintien de lame de racloir selon la revendication 2 ou 3, caractérisé en ce que la barrette de fixation (11) est réalisée en forme d'équerre.
  5. Dispositif de maintien de lame de racloir selon l'une des revendications 2 à 4, caractérisé en ce que le ressort de fixation (12) est soudé avec la barrette de fixation (11).
  6. Dispositif de maintien de lame de racloir selon l'une des revendications 2 à 4, caractérisé en ce que le ressort de fixation forme un composant d'une seule pièce avec la barrette de fixation.
  7. Dispositif de maintien de lame de racloir selon l'une des revendications précédentes, caractérisé en ce que le porte-lame (8) est en acier inoxydable.
  8. Dispositif de maintien de lame de racloir selon l'une des revendications précédentes, caractérisé en ce que le porte-lame (8) est réalisé avec effet ressort.
  9. Dispositif de maintien de lame de racloir selon l'une des revendications 2 à 8, caractérisé en ce que la barrette de fixation (11) est en acier inoxydable.
  10. Dispositif de maintien de lame de racloir selon l'une des revendications 2 à 9, caractérisé en ce que le ressort de fixation (12) est en acier inoxydable.
EP07727094A 2006-03-25 2007-03-20 Dispositif de maintien de lame de racloir avec porte-lame de racloir Not-in-force EP2002052B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006013892A DE102006013892B3 (de) 2006-03-25 2006-03-25 Schaberklingenhaltevorrichtung mit Schaberklingenträger
PCT/EP2007/052617 WO2007110353A1 (fr) 2006-03-25 2007-03-20 Dispositif de maintien de lame de racloir avec porte-lame de racloir

Publications (2)

Publication Number Publication Date
EP2002052A1 EP2002052A1 (fr) 2008-12-17
EP2002052B1 true EP2002052B1 (fr) 2010-05-26

Family

ID=37950187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727094A Not-in-force EP2002052B1 (fr) 2006-03-25 2007-03-20 Dispositif de maintien de lame de racloir avec porte-lame de racloir

Country Status (6)

Country Link
US (1) US7828937B2 (fr)
EP (1) EP2002052B1 (fr)
AT (1) ATE469267T1 (fr)
CA (1) CA2644918C (fr)
DE (2) DE102006013892B3 (fr)
WO (1) WO2007110353A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8584403B2 (en) * 2011-01-03 2013-11-19 Calvin A. Frelier Fluid flow channel and scavenger system
JP2024073671A (ja) * 2022-09-29 2024-05-30 ヒューレット－パッカード デベロップメント カンパニー エル．ピー． 移動可能なブレードホルダを有するブレード支持装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE557556C (de) * 1927-03-25 1932-08-25 Saeming Eriksen Akre Schaber fuer Trommeln und Walzen an Papiermaschinen, Kalandern u. dgl.
US4367120A (en) * 1980-03-13 1983-01-04 Vickerys Limited Doctor blade mounting assembly
US4665859A (en) * 1985-12-11 1987-05-19 Thermo Electron-Web Systems, Inc. Finger-type doctor blade holder
US5279710A (en) * 1988-11-16 1994-01-18 Aikawa Iron Works, Co., Ltd. Doctor blade supporting structure
GB9208003D0 (en) * 1992-04-10 1992-05-27 Vickerys Ltd A mounting assembly
JP3264798B2 (ja) * 1995-07-28 2002-03-11 株式会社ドクター製作所 移動式ドクターブレードを備えたドクター装置
FI3835U1 (fi) * 1998-11-20 1999-03-16 Valmet Corp Kuormitusletku käytettäväksi paperikoneen kaapimessa tai päällystyslaitteessa
FI105577B (fi) * 1999-02-03 2000-09-15 Valmet Corp Paperikoneen kaavinlaitteisto
US6202252B1 (en) * 1999-06-03 2001-03-20 Valmet Ltd. Doctoring apparatus
WO2004012143A1 (fr) * 2002-07-30 2004-02-05 Itochu Corporation Lecteur d'image et procede de lecture d'image
DE10251983A1 (de) * 2002-11-08 2004-05-19 Helmut Strauch Schaberklingenhaltevorrichtung

Also Published As

Publication number Publication date
CA2644918C (fr) 2011-03-08
US20090065165A1 (en) 2009-03-12
CA2644918A1 (fr) 2007-10-04
WO2007110353A1 (fr) 2007-10-04
DE102006013892B3 (de) 2007-05-10
US7828937B2 (en) 2010-11-09
ATE469267T1 (de) 2010-06-15
DE502007003937D1 (de) 2010-07-08
EP2002052A1 (fr) 2008-12-17

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