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EP3423628A1 - Dispositif de retenue pourvu d'un racloir - Google Patents

Dispositif de retenue pourvu d'un racloir

Info

Publication number
EP3423628A1
EP3423628A1 EP17716448.0A EP17716448A EP3423628A1 EP 3423628 A1 EP3423628 A1 EP 3423628A1 EP 17716448 A EP17716448 A EP 17716448A EP 3423628 A1 EP3423628 A1 EP 3423628A1
Authority
EP
European Patent Office
Prior art keywords
creping
blade
holding device
jaws
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.)
Pending
Application number
EP17716448.0A
Other languages
German (de)
English (en)
Inventor
Reinhard Knop
Jörg MORSCHEK
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.)
Clouth Sprenger GmbH
Original Assignee
Horst Sprenger 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 Horst Sprenger GmbH filed Critical Horst Sprenger GmbH
Publication of EP3423628A1 publication Critical patent/EP3423628A1/fr
Pending legal-status Critical Current

Links

Classifications

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

Definitions

  • the Er chargedsung relates to a holding device with a creping doctor blade, which is in operative connection with a base material carrying a roll, in particular a Yankee cylinder, and with jaws, between which the creping doctor blade is arranged according to the features of the preamble of claim.
  • a scraper also called a creping scraper
  • the creping doctor also called creping blade, is arranged on a holding device.
  • Such a known holding device with a creping blade is shown in the attached Figure 1, which is considered as prior art. Between the two jaws of the holding device, the crepe scraper rings is inserted and guided. However, it has a gap between the jaws, designated "SP" in the figure, so that it is movably held between the two jaws.As a counterhold for the creping blade, a support blade is arranged on the holding device, which extends close to the end of the Crepe doctor blade is sufficient to guide them in engaging the material of the roll.
  • the invention is therefore based on the object to improve a generic holding device so that the performance of the overall system is increased.
  • an improvement in the vibration behavior is to be brought about and the occurrence of Ratter marks on the surface of the roller or of the Yankee cylinder is eliminated or substantially reduced.
  • the creping doctor blade is firmly clamped between the jaws.
  • the clamping should take place over the longitudinal extent of the creping blade in the Haite friendship.
  • fixed restraint is meant that, for example, two spaced apart jaws of the holder receive the creping blade and are subsequently delivered so that the creping blade can no longer move relative to the jaws with the clamped portion in the jaws conceivable (to allow a least possible movement) that between a jaw and the surface of the creping blade or both jaws and the respective associated surface of the creping blade a resilient material is interposed or at least one of the jaws is coated with such an elastically yieldable material or from this As a result, the "firm” clamping of the creping blade between the jaws is maintained and at the same time the lowest possible clearance compensation is given, this clearance compensation is extremely reduced compared to the known storage of the creping blade in a gap between the two cheeks.
  • an elastic, resilient element is installed between at least one jaw and the creping doctor blade. It can also be arranged between two jaws and the creping blade ever an elastic, resilient element.
  • the coating of one or both jaws with an elastic element can also be provided. The clamping of the creping blade with the interposition of the elastic element is still to be designated as fixed. At the same time the smallest possible clearance compensation is given, whereby movements of the creping blade are attenuated.
  • a material for the elastic, resilient element or the coating of the jaws is a plastic material into consideration.
  • a hollow body can also be installed between the creping doctor blade and one or both jaws, which are preferably made of steel.
  • This hollow body may have a pressure medium, which consists for example of air or a liquid, wherein the pressure of the pressure medium in the hollow body is either kept constant or can be varied depending on the behavior of the overall system. This makes it possible to vary the overall system in vibration behavior and to avoid the Ratter marks.
  • a variation of the clamping suggestions along the clamping area of the creping doctor blade can also be advantageous.
  • FIG. 2 shows a section, similar to FIG. 1, with the clamping of the creping doctor blade according to the invention
  • Figure 3 a section through a holding device with the clamping of
  • FIG. 4 shows a further section analogous to FIG. 3.
  • 1 generally denotes a holding device having jaws 3, between which a crepe doctor blade 2 is inserted, wherein between the jaws 3 and the creping blade 2, a gap SP is provided. Furthermore, a support blade 4 is attached to the holding device 1, which extends with its outer edge close to the end of the creping blade 2 and this supports along its working width.
  • the gap SP is dependent on the geometry of the creping doctor blade and may amount to a few millimeters up to a distance of 20 millimeters between the surfaces of the mutually facing jaws 3 (without the creping doctor blade 2 inserted between them).
  • the support blade 4 is distributed depending on the design on the edge or over the entire working width of the creping blade 2. By appropriate pressure on this support blade 4, this and the creping blade 2 is deformed, so as to allow in a known manner a targeted profiling ⁇ ie adaptation to the surface of the Yankee cylinder over its longitudinal extent).
  • the creping blade 2 "loosely" between the two jaws 3 is arranged and stored, it can lead to unwanted own frequencies, in particular the Yankee cylinder associated longitudinal edge of the creping blade 2 and thus disadvantageously the chatter marks on the surface of the Yankee cylinder arise.
  • the Haite wrench is generally denoted by 10 with their components.
  • a creping doctor blade 20 is firmly clamped, whereby with respect to the surface of the roller or the Yankee Zyiinders, which is not shown, the natural frequency of the overall system is reduced and the disadvantageous Ratter marks are avoided.
  • a support blade designated 40 will again be present to support the end region of the creping blade 20.
  • the support blade 40 can also be omitted, since the clamping of the creping blade 20 between the two jaws 30 gives sufficient strength.
  • FIGS. 3 and 4 show a holding device according to the invention with a clamping of the creping doctor blade, in which a hollow body is installed between the creping doctor blade and one (or both) jaws.
  • FIG. 3 shows a section through the holding device 10 at one point
  • FIG. 4 shows a further section through the same holding device 10.
  • the creping doctor blade 20 and the optional supporting blade 40 (which is present in FIGS. 3 and 4, but can be omitted).
  • the creping doctor blade 20 is clamped between the two jaws 30 without creating a gap in the clamping area.
  • the support blade 40 if present, is also clamped between two jaws 50.
  • the two jaws 30 are clamped together directly or indirectly by a connecting means.
  • a connecting means This is, for example, a screw 60.
  • the left jaw 30 is integrally formed in viewing Figures 3 and 4 and has a passage for the screw 60
  • the right jaw 30 is indirectly connected to the screw 60, namely a carrier 70.
  • the optional support blade 40 in which the one jaw 50 (when viewing FIG. 3, the upper jaw 50) is connected directly to the lower jaw 50 via connecting means (eg also a screw connection).
  • the lower jaw 50 is disposed on a support 80, the z. B. on the carrier 70, on the left jaw 30 or otherwise may be attached. Otherwise attached means that z.
  • the left jaw 30, the carrier 70 (or right jaw 30), and the carrier 80 are disposed and secured on a common carrier. This common carrier is indicated in Figures 3 and 4 below.
  • the right jaw 30 has a chamfer, just as the lower jaw 50 has a chamfer.
  • These bevels can but do not have to come to rest.
  • a hollow body which is installed between the creping blade 20 and at least one of the two jaws 30.
  • this hollow body is a pressure hose 90, which is shown in a relaxed state. If this hollow body, in particular the pressure hose 90, with a pressure medium ⁇ z.
  • the overall system can be influenced in the vibration behavior and preferably kept either by controlling the pressure of the pressure medium in the hollow body either constant or varied depending on the behavior of the overall system to the disadvantageous Rreliter brands avoid.
  • the hollow body extends over the same width as the creping doctor blade 20, but it may also be formed shorter or longer. Not shown, but there are means for filling the hollow body with a pressure medium and for the control or regulation of this Durckmediums in the hollow body.

Landscapes

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

Abstract

Dispositif de retenue (10) pourvu d'un racloir (20) qui se trouve en interaction avec un rouleau portant une matière de base, en particulier avec un cylindre frictionneur, et de mâchoires (30) entre lesquelles est disposé le racloir (20). Ledit dispositif de retenue est caractérisé en ce que le racloir (20) est serré de manière fixe entre les mâchoires (30).
EP17716448.0A 2016-03-04 2017-03-03 Dispositif de retenue pourvu d'un racloir Pending EP3423628A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016002557 2016-03-04
PCT/DE2017/100173 WO2017148478A1 (fr) 2016-03-04 2017-03-03 Dispositif de retenue pourvu d'un racloir

Publications (1)

Publication Number Publication Date
EP3423628A1 true EP3423628A1 (fr) 2019-01-09

Family

ID=58530331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17716448.0A Pending EP3423628A1 (fr) 2016-03-04 2017-03-03 Dispositif de retenue pourvu d'un racloir

Country Status (3)

Country Link
EP (1) EP3423628A1 (fr)
DE (1) DE102017104536A1 (fr)
WO (1) WO2017148478A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB800607A (en) * 1956-01-13 1958-08-27 Harold Eric Baliol Scott Improvements in or relating to doctors for papermaking and other machines
DE4424032C1 (de) * 1994-07-11 1995-12-07 Johannes Prof Dr Rer N Gartzen Vorrichtung zur Herstellung von Kreppapier
DE19508298C2 (de) * 1995-03-09 1999-05-06 Joh Clouth Fa Schabvorrichtung für eine Walze
FI105577B (fi) * 1999-02-03 2000-09-15 Valmet Corp Paperikoneen kaavinlaitteisto
PL204172B1 (pl) * 2007-05-16 2009-12-31 Sławomir Stera Uchwyt skrobaka maszyny papierniczej

Also Published As

Publication number Publication date
WO2017148478A1 (fr) 2017-09-08
DE102017104536A1 (de) 2017-10-12

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