EP1391552A1 - Arrangement d'un racloir - Google Patents

Arrangement d'un racloir Download PDF

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Publication number
EP1391552A1
EP1391552A1 EP03016855A EP03016855A EP1391552A1 EP 1391552 A1 EP1391552 A1 EP 1391552A1 EP 03016855 A EP03016855 A EP 03016855A EP 03016855 A EP03016855 A EP 03016855A EP 1391552 A1 EP1391552 A1 EP 1391552A1
Authority
EP
European Patent Office
Prior art keywords
blade
hose
carrier
holder
pressure
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
EP03016855A
Other languages
German (de)
English (en)
Other versions
EP1391552B1 (fr
Inventor
Josef Schneid
Roland Greis
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1391552A1 publication Critical patent/EP1391552A1/fr
Application granted granted Critical
Publication of EP1391552B1 publication Critical patent/EP1391552B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21G3/005—Doctor knifes

Definitions

  • the invention relates to a scraper arrangement with a Doctor blade and a blade carrier, which is about an axis is pivotally arranged on a carrier holder, wherein between the carrier holder and the blade carrier at least one pressurizable hose is arranged which extends parallel to the axis.
  • Such a scraper arrangement is from DE 200 14 746 U1 known.
  • Such a scraper arrangement is used, for example, in used in papermaking to clean a roller, over which a paper web is passed. Of the Deposits of paper run out on the paper web Knock down the surface of the roller and the without the scraper arrangement sooner or later negatively affect the appearance of the paper web.
  • Another The application is also used in papermaking use in a coating device. The Invention is hereinafter in connection with the Cleaning a calender roll is described without, however to be limited to that.
  • the paper webs are made up in relatively large widths produced to 10 m. Accordingly, they have to be wide Be rollers, for example, for finishing the paper web used in a calender.
  • the Scraper more precisely, the scraper blade must be over the entire width, i.e. the axial length, if possible lie evenly on the roller. This is especially true for rollers that have an elastic surface. These rollers are very different Contact pressures also wear differently, which is what negatively noticeable in the quality of the paper web makes.
  • the invention has for its object the contact pressure to be designed as evenly as possible with a simple structure.
  • This task is at the beginning of a scraper arrangement mentioned type solved in that the hose in Axial direction is longer than the blade carrier and in Area of each axial end of the blade support a deactivation device is intended to have an effect the pressure in the hose on the blade carrier in a predetermined, arranged at the end of the blade carrier Section limited.
  • the deactivation device an effect of the pressure in the hose on the blade carrier prevented in the section.
  • the blade bearer will not at all at its axial ends pressurized. This allows the scraper assembly mechanically relatively easy to train without forego the beneficial effects of the pressure hose to have to.
  • the forces that create a pressure the axial ends of the doctor blade to the roller are due to the inherent rigidity of the Blade carrier and the doctor blade applied.
  • the deactivation device preferably limits one Pressurization between blade carrier and carrier holder.
  • the deactivation device therefore intervenes the transfer of pressure between the blade carrier and the carrier holder and limits the size of the Pressure between the blade carrier and carrier holder can work.
  • the deactivation device prevents the hose in the Area of the axial ends of the blade support below Pressure on both the blade carrier and the carrier holder can concern. In the simplest case, this can be done achieve a mechanical lock, for example expansion of the tube to a certain extent prevents beyond. This mechanical lock can can also be part of the hose itself.
  • the deactivation device preferably has Axial direction has an effective length that is applied the blade carrier with the pressure in the hose limited to the axial length of the doctor blade. This is particularly advantageous if the doctor blade is shorter in the axial direction than the blade carrier. The blade carrier is then only pressurized there, where the scraper blade also lies against the roller can. A higher contact pressure in the edge area of the Blade is avoided with great reliability.
  • the deactivation device is preferably a Hold-down formed between the blade carrier and the hose is arranged.
  • the hold-down ensures that the hose does not expand as far can contact the blade holder.
  • the Hose can be uniform over its entire length be trained. Its extension towards the Blade holder is limited by the hold-down device.
  • the Hold-down devices can, if necessary, mounted at different locations in the carrier holder become. You can be different in this way Take into account the axial lengths of the doctor blade.
  • the hold-down device is preferably by an angle element formed, which is connected to the carrier holder.
  • the training as an angle element allows the Cover the hose so far that it is in the area the axial ends not undesirably on the Carrier body can approach.
  • the angle element has a first Has leg that interacts with the hose / and a second leg, which is on the carrier holder is attached, with both legs parallel to the carrier holder run.
  • the angle element therefore has three Sections, namely the two legs and a center piece, that connects the two legs.
  • This centerpiece can, for example, perpendicular to the two Legs should be arranged. Because both legs run parallel to the beam holder, it is possible to attach one leg to the carrier holder over a large area and at the same time the hose parallel to the carrier holder hold down.
  • the deactivation device Preferably there are two hoses on either side the axis is provided, and the deactivation device only acts on a hose.
  • Two hoses are cheap, if you use the hoses to remove the doctor blade not only hold on to the roller, but the Scraper blade also wants to lift off the roller. Depending on the desired printing direction then becomes one or the other hose is pressurized.
  • When taking off the doctor blade from the roller is a deactivation of the hose at the axial end of the blade carrier however not necessary.
  • the deactivation device acts on the hose on that of the doctor blade opposite side of the axis is arranged. This is usually the hose that is used to to keep the scraper blade in contact with the roller.
  • Fig. 1 shows a scraper arrangement 1 for cleaning a only schematically shown roller 2, which is in Direction of an arrow 3 rotates.
  • the roller 2 can for example a soft roller, i.e. a roller with a elastic cover, in a not shown Be a calender.
  • the scraper arrangement 1 has a scraper blade 4, which can also be called a scraper blade.
  • the Doctor blade 4 is attached to a blade carrier 5.
  • the blade carrier can be pivoted about an axis 6, which is attached to a carrier holder 7.
  • the carrier holder 7 is in turn on a not shown Fixed chair in which the roller 2 is also stored is.
  • the carrier holder 7 thus has a defined one Position relative to roller 2.
  • a hose 8 is provided, which does not have a closer shown pressure supply with a pressurized Fluid, for example compressed air, can be filled can.
  • a pressurized Fluid for example compressed air
  • the hose 8 is pressurized, then he expands and swings the blade holder 5 counterclockwise (based on the Fig. 1) about the axis 6 until the doctor blade 4 to the system comes to the roller 2.
  • Another pressure increase causes the doctor blade 4 with the required Contact force is applied to the roller 2.
  • the hose 8 an axial length that is greater than the axial Length of the blade carrier 5. This simplifies the Possibility to apply pressure fluid to the hose 8. However, there is a risk that the doctor blade 4 receive a higher contact pressure in the edge area can, in turn, damage to the roller 2 can lead.
  • a deactivation device 10 arranged, which prevents that the hose 8 expands so far in this area that he touches the blade carrier 5 or on others Way exerts pressure on the blade carrier 5. Strictly speaking one would have to say that the deactivation device 10 prevents pressure between the carrier holder 7 and the blade carrier 5 is exercised.
  • the Deactivation device could namely in modification of the illustrated embodiment also ensure that the hose 8 no further in the direction can expand on the carrier holder 7, on the blade carrier 5 but is present.
  • the deactivation device is in the simplest case formed by an angle element 11, the first Has leg 12 which is parallel to the carrier holder 7 extends and a space with the support holder 7 13 forms in which an end section 14 of the hose 8 is arranged.
  • the leg 12 prevents the end section 14 of the hose 8 to the blade carrier 5 approximates.
  • the angle element 11 has a second leg 15 on which is attached to the carrier holder 7.
  • the two Legs 12, 15 are parallel to one another and parallel to the carrier holder 7. This configuration has the advantage that for fastening the angle element 11 to the carrier holder 7 a relatively large area available stands.
  • Between the two legs 12, 15 is a Center piece 16 arranged, which connects the two legs. This center piece 16 is perpendicular to the two legs 12, 15. But this is not necessarily required. It can be done with the two legs 12, 15 also include an angle that deviates from 90 °.
  • the angle element 11 is positioned and has one such an extent that the length in which the Hose 8 pressurization between the carrier holder 7 and the blade carrier 5 can generate the axial length of the doctor blade 4 is limited. deviations of this effective length are permissible as long as there are no major contact forces on the axial End of the doctor blade 4 result.

Landscapes

  • Paper (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP03016855A 2002-08-20 2003-07-24 Arrangement d'un racloir Expired - Fee Related EP1391552B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20212745U DE20212745U1 (de) 2002-08-20 2002-08-20 Schaberanordnung
DE20212745U 2002-08-20

Publications (2)

Publication Number Publication Date
EP1391552A1 true EP1391552A1 (fr) 2004-02-25
EP1391552B1 EP1391552B1 (fr) 2006-12-13

Family

ID=7974234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03016855A Expired - Fee Related EP1391552B1 (fr) 2002-08-20 2003-07-24 Arrangement d'un racloir

Country Status (3)

Country Link
EP (1) EP1391552B1 (fr)
AT (1) ATE348220T1 (fr)
DE (2) DE20212745U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7431801B2 (en) 2005-01-27 2008-10-07 The Procter & Gamble Company Creping blade
US7691236B2 (en) 2006-07-26 2010-04-06 The Procter + Gamble Company Creping blade with a highly smooth bevel surface
US7867364B2 (en) * 2006-08-16 2011-01-11 Kadant Inc. Doctor blade holder permitting efficient assembly of doctor assemblies and replacement of doctor blades

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2304201B2 (es) * 2006-06-13 2009-05-25 Jose Joaquin Amonarriz Azcolain Portalaminas de crepado.
DE102022113503A1 (de) 2022-05-30 2023-11-30 Voith Patent Gmbh Schaberhalter und Schabvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014746U1 (de) * 2000-08-25 2000-10-19 Voith Sulzer Papiertech Patent Schaberanordnung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014746U1 (de) * 2000-08-25 2000-10-19 Voith Sulzer Papiertech Patent Schaberanordnung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7431801B2 (en) 2005-01-27 2008-10-07 The Procter & Gamble Company Creping blade
US7691236B2 (en) 2006-07-26 2010-04-06 The Procter + Gamble Company Creping blade with a highly smooth bevel surface
US7867364B2 (en) * 2006-08-16 2011-01-11 Kadant Inc. Doctor blade holder permitting efficient assembly of doctor assemblies and replacement of doctor blades

Also Published As

Publication number Publication date
DE50305937D1 (de) 2007-01-25
EP1391552B1 (fr) 2006-12-13
DE20212745U1 (de) 2002-10-17
ATE348220T1 (de) 2007-01-15

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