EP0684338A2 - Porte-lame - Google Patents

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Publication number
EP0684338A2
EP0684338A2 EP95107240A EP95107240A EP0684338A2 EP 0684338 A2 EP0684338 A2 EP 0684338A2 EP 95107240 A EP95107240 A EP 95107240A EP 95107240 A EP95107240 A EP 95107240A EP 0684338 A2 EP0684338 A2 EP 0684338A2
Authority
EP
European Patent Office
Prior art keywords
blade
blade holder
holder according
distance
support element
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
EP95107240A
Other languages
German (de)
English (en)
Other versions
EP0684338B1 (fr
EP0684338A3 (fr
Inventor
Günter Dr. Halmschlager
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 Sulzer Papiermaschinen 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 Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0684338A2 publication Critical patent/EP0684338A2/fr
Publication of EP0684338A3 publication Critical patent/EP0684338A3/fr
Application granted granted Critical
Publication of EP0684338B1 publication Critical patent/EP0684338B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
    • 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 arranging a blade (blade holder) on a transport device of a web, in particular on a roller or a drying cylinder of a paper machine, in which the blade held in a blade clamping device can be brought transversely to the running direction of a web, the blade Clamping device is arranged on a blade support beam extending transversely to the web running direction, and a support element is articulated with a first pivot bearing on a frame and with a second pivot bearing on the blade support beam.
  • a blade holder for example, coating a material web, in particular a paper web, with a coating slip by means of a doctor blade with which the layer thickness should be as uniform as possible.
  • a material web in particular a paper web
  • a coating slip by means of a doctor blade with which the layer thickness should be as uniform as possible.
  • Another possible use is the use in the production of crepe paper, in which a material web runs onto a scraper arranged on a transport roller in order to thereby produce the structure typical of crepe paper.
  • the paper quality is significantly influenced by the contact pressure of the blade on the web or on the transport device and the size of the blade working angle.
  • the blade can be brought into a predetermined position as precisely as possible.
  • the blades wear out, which is why they have to be replaced or reground after they have reached their wear limit.
  • the blade is usually removed from the roller from its operating position.
  • the blade of the scraper or squeegee is then brought back exactly into the previously assumed operating position.
  • the blades should also be able to be adjusted in their operating position, for example to optimize the paper quality or when changing the paper machine to a different type of paper.
  • EP-PS 0 137 837 discloses a blade holder in which the arrangement of a blade of a doctor blade is achieved by two rotary movements of a blade support beam, each about a pivoting or rotating axis running perpendicular to the transport direction.
  • this blade holder has two actuators with screw drives, which can be connected to one another by means of a clutch and a bevel gear.
  • the positioning of the blade should be easier and faster than with blade holders known from the prior art.
  • the support element with the second pivot bearing is pivotally articulated on a lever such that the blade holder is provided with a pivot device connected to the lever and the support element, by means of which the blade support beam can be pivoted from an operating position into a maintenance position which is at a greater distance from the roller , wherein the pivoting movement takes place by changing the distance between the articulation points of the pivoting device on the lever and the support element.
  • a positioning device connected to the frame and the support element for setting a blade working angle, the positioning of the blade being effected by changing the distance between the two articulation points of the positioning device on the frame and the support element.
  • the pivoting device increases the distance between its articulation points on the lever and the support element by a certain amount. This can be done, for example, by means of a cylinder of the pivoting device of a preferred embodiment which can be acted upon with a pressure medium a pneumatic cylinder. After the maintenance work on the blade has been carried out, the distance between the two articulation points is reduced again to the original amount. With this blade holder, it is therefore only necessary to carry out a translatory movement of the same length in order to change from the operating position to the maintenance position and back to the operating position.
  • a blade holder according to the invention is thus distinguished on the one hand by simple operation.
  • such translational movements can be carried out relatively quickly and also very precisely, for example with the pneumatic cylinder already mentioned above.
  • the tip of the blade can be arranged in the axis of rotation of the first pivot bearing. This can be implemented constructively in such a way that the axis of rotation of the pivot bearing lies on a radius on which the blade moves from the maintenance position into the operating position during its movement. In such an embodiment, it is then particularly easy to vary the blade working angle by changing the distance between the articulation points of the positioning device on the frame and the support element, without the contact pressure of the blade being influenced thereby. This is possible because when the positioning device is actuated, the blade only rotates around its tip, without the arrangement of the blade being changed in any other way with respect to the transport device.
  • a particularly simple change in the distance between the articulation points of the positioning device can be achieved in that the positioning device is preferably provided with a screw drive arranged on the connecting line of the articulation points.
  • the invention has a control in a practical embodiment.
  • the blade holder according to the invention can thus be remotely controlled with corresponding control signals, for example from an operating console, into the maintenance and operating position.
  • a remote-controlled adjustment of the blade working angle can also be achieved in this way.
  • the current blade working angle can be detected by a sensor system and output as a corresponding electrical signal. If these signals, which correspond to the current blade working angle, are fed to a control device, an exact comparison between a target and actual arrangement of the blade support beam can be achieved.
  • the blade holder according to the invention shown in FIG. 1 is arranged on an end face, which is shown in sections, of a roller 1 of a paper machine rotating in the clockwise direction for producing crepe paper.
  • a second (mirror image) blade holder according to the invention which corresponds to that shown in FIG.
  • a blade support beam 2 which extends perpendicular to the plane of the drawing and along the lateral surface of the roller 1, is fastened between the two blade holders.
  • the blade holder also has a support element 3, a lever 4 shown in broken lines and a stationary frame 5.
  • the arrangement of these elements is such that the lever 4 is arranged in front of the support element 3 in the viewing direction of the illustration in FIG. 1 and this is in turn arranged in front of the blade support beam 2.
  • the end face 6 of the blade support beam 2 and the surface 7 of the frame 5 are approximately at the same height.
  • the support element 3 has two support arms 9, 10 which are aligned approximately perpendicular to one another.
  • a screw drive 15 as the positioning device 14. This is driven by an electric motor (not shown) and is located between an articulation point 16 on the frame 5 and an articulation point 17 on the first support arm 9 of the support element 3 along a ( imaginary) connecting line 18 of the two articulation points 16, 17 arranged.
  • the screw drive 15 is in each case rotatably fastened about the two articulation points 16, 17.
  • the support element 3 is also pivotally attached to the frame 5 by its second support arm 10 by means of a first pivot bearing 20 (see in particular FIG. 2).
  • the blade support beam 2 which is rigidly connected to the lever 4, is rotatably and axially displaceable (not shown here) in the base part 8 of the support element 3 in a second bearing.
  • a swivel device 24 Between one Articulation point 22 in the area of the other end of the lever 4 and a further articulation point 23 on the first support arm 9 of the support element 3 there is a swivel device 24.
  • This is provided with a pneumatic cylinder 25, the direction of action along the connecting line 26 of the two articulation points 22, 23 Swivel device 24 extends.
  • the connecting line 26 is at a greater distance from the pivot bearing 21 than the connecting line 18.
  • the pneumatic cylinder 25 is also rotatably fastened about its two articulation points 22, 23.
  • the frame 5, in which the axis of rotation of the roller 1, which is also not shown, is mounted, has at its lower end a tab 28 which can be adjusted with a threaded bolt 27.
  • the pivot point 16 of the positioning device 14 and the first pivot bearing 20 of the support element 3 are located on the tab 28 of the frame 5.
  • the threaded bolt 27 By turning the threaded bolt 27, the distance of the pivot point 16 and the first pivot bearing 20 from the circumferential line of the roller 1 can be changed along an axis of displacement become.
  • “distance” is to be understood in each case as the projection of the distance line that actually runs spatially in the figures into the drawing planes of FIGS. 1-3.
  • the blade support beam 2 which in the illustrated embodiment is a support beam of a scraper 30, is mounted in the second pivot bearing 21 together with the support element 3 and the lever 4. It can perform relative movements relative to the support element 3 about the axis of the second pivot bearing 21.
  • the blade support beam 2 is arranged in a rotationally fixed manner in relation to the lever 4.
  • the contact pressure of the scraper 30 located on the blade support beam 2 can be varied with a blade clamping device, not shown, which is known per se from the prior art. This is done in that the scraper 30 is bent along its entire length (perpendicular to the plane of the drawing) and thus a bending force is generated in the direction of the roller 1.
  • the blade holder Before the blade holder is used for the first time, it is in a maintenance position as shown in Fig. 2.
  • the axis of the first pivot bearing 20 has been adjusted with the aid of the threaded bolt 27 such that it is located directly above the circumferential line of the roller 1, as shown in FIG.
  • the scraper 30 After the scraper 30 is fastened to the blade support beam 2 and a bending force which brings about a predetermined contact pressure is applied to it, it is arranged in an operating position on the roller 1 by actuating the pivoting device 24.
  • the sharp edge, or in the illustrations of the figures the blade tip, of the scraper 30 is aligned with the axis of rotation of the second pivot bearing 21.
  • the second blade holder according to the invention not shown on the other end face of the roller 1, is always aligned in the same way like the blade holder shown. In order to pivot the blade support beam 2, the two blade holders always perform the same movements synchronously.
  • the frame 3 can be pivoted together with the blade support bar 2 around the blade tip.
  • the positioning device 14 is used for this. If, for example, starting from the arrangement shown in FIG. 1, the scraper 30 is to be provided with a blade working angle of FIG. 3, the screw drive 15 of the positioning device 14 is actuated in such a way that the distance between the two articulation points 16, 17 is one New blade working angle corresponding amount increased. As a result, the support element 3 rotates counterclockwise around the first pivot bearing 20. Since the distance between the two articulation points 22, 23 remains the same, the lever follows this movement. Overall, this requires a rotary movement of the blade support beam 2, likewise counterclockwise, only around the first pivot bearing 20.
  • the blade tip is aligned with the axis of the first pivot bearing 20. This has the consequence that the blade support beam 2 rotates around the blade tip, whereby the new blade working angle is set after the movement has ended.
  • the blade working angle can be set continuously, regardless of the contact pressure. This can even be done during the operation of the paper machine, for example to compensate for wear of the blade tip of the scraper 30.
  • blade working angles that are optimally found for certain types of paper can be reproducibly set and maintained at any time in a simple manner.
  • the scraper 30 In this maintenance position, the scraper 30 is laterally accessible to the blade holder and can, if necessary, be exchanged for another. If it is still possible due to the state of wear, the scraper 30 is preferably reground. However, the width of the scraper 30 is reduced. So that the blade tip can always be brought into the axis of the first pivot bearing 20 despite different widths of the scraper 30, the scraper 30 is supported with its end opposite the blade tip on an adjustable stop surface, not shown. Different widths of the scraper 30 can be compensated for with the stop bar.
  • the distance between the two articulation points 22, 23 is reduced again to the original amount by the original pressurization of the pneumatic cylinder 25.
  • the lever 4 and the blade support beam 2 thereby rotate counterclockwise around the second pivot bearing 21 along the same path back to their original arrangement, the operating position.
  • the blade support bar is arranged on the roller 1 with the same blade working angle and contact pressure as before.
  • the rigidity of the blade holders according to the invention is increased by mechanical cross connections, for example a cross strut. It is also possible to provide manually operated trapezoidal thread spindles instead of the electric drives of the screw drives.

Landscapes

  • Paper (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Cleaning In Electrography (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
EP95107240A 1994-05-27 1995-05-12 Porte-lame Expired - Lifetime EP0684338B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4418464 1994-05-27
DE4418464A DE4418464C2 (de) 1994-05-27 1994-05-27 Klingenhalterung

Publications (3)

Publication Number Publication Date
EP0684338A2 true EP0684338A2 (fr) 1995-11-29
EP0684338A3 EP0684338A3 (fr) 1997-04-23
EP0684338B1 EP0684338B1 (fr) 1999-09-29

Family

ID=6519064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107240A Expired - Lifetime EP0684338B1 (fr) 1994-05-27 1995-05-12 Porte-lame

Country Status (5)

Country Link
US (1) US5868841A (fr)
EP (1) EP0684338B1 (fr)
AT (1) ATE185177T1 (fr)
DE (2) DE4418464C2 (fr)
ES (1) ES2138107T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989234A2 (fr) * 1998-09-11 2000-03-29 Voith Sulzer Papiertechnik Patent GmbH Couteau racleur
AT16455U1 (de) * 2017-05-08 2019-10-15 Valmet Technologies Oy Vorrichtung zur bewegung eines tragbalkens

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505667C2 (sv) * 1996-01-09 1997-09-29 Btg Kaelle Inventing Ab Schaberhållare
DE29707991U1 (de) * 1997-05-03 1997-07-03 Emwe Gmbh Vorrichtung zum Messen der relativen Positionierung einer Schaberklinge zu einer Walze einer Papiermaschine
FI114557B (fi) * 2003-03-14 2004-11-15 Metso Paper Inc Palkin sisältävä paperikoneen käsittelylaitteisto

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428473A1 (fr) * 1978-06-13 1980-01-11 Jagenberg Werke Ag Dispositif pour l'application continue d'une enduction sur une bande de materiau
US4919756A (en) * 1988-08-26 1990-04-24 The Procter & Gamble Company Method of and apparatus for compensatingly adjusting doctor blade
FR2641204A1 (fr) * 1988-12-30 1990-07-06 Valmet Paper Machinery Inc Dispositif pour commander l'angle d'inclinaison d'une racle
WO1993005229A1 (fr) * 1991-09-02 1993-03-18 Valmet-Karlstad Ab Appareil servant a regler le crepage d'un papier
WO1993006300A1 (fr) * 1991-09-16 1993-04-01 Valmet-Karlstad Ab Procede et dispositif pour le reglage des conditions de crepage

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698453A (en) * 1952-09-11 1955-01-04 Blaw Knox Co Holder for interchangeably supporting knives against the periphery of revolving drums
US3070066A (en) * 1957-08-06 1962-12-25 Time Inc Coating apparatus having blade control means and releasable blade holder
US3031703A (en) * 1960-03-10 1962-05-01 Dominion Foundries & Steel Continuous strip wiping apparatus
US3065487A (en) * 1960-11-21 1962-11-27 Vickerys Ltd Doctors for paper making machines
US3113890A (en) * 1961-06-26 1963-12-10 Kimberly Clark Co Apparatus for smoothing coating materials on a paper web
US3128207A (en) * 1961-09-07 1964-04-07 Beloit Iron Works Trailing blade coater blade loading mechanism
US3361059A (en) * 1965-03-11 1968-01-02 Donnelley & Sons Co Doctor blade for rotogravure cylinder
US3359940A (en) * 1965-09-17 1967-12-26 Beloit Corp Blade holding mechanism for coaters
DE2845036A1 (de) * 1978-10-16 1980-04-17 Jagenberg Werke Ag Vorrichtung zum kontinuierlichen gleichzeitigen aufbringen von beschichtungen konstanter dicken auf beide seiten einer materialbahn
DE3311999A1 (de) * 1983-04-02 1984-10-11 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung zur beschichtung laufender warenbahnen
DE3513063A1 (de) * 1985-04-12 1986-10-16 Jagenberg AG, 4000 Düsseldorf Streicheinrichtung zur beschichtung von entlang einer gegenwalze gefuehrten warenbahn, insbesondere papierbahnen
DE3825816A1 (de) * 1988-07-29 1990-02-01 Jagenberg Ag Vorrichtung zum kontinuierlichen beschichten einer um eine gegenwalze gefuehrten materialbahn
US5512139A (en) * 1993-12-08 1996-04-30 Beloit Technologies, Inc. Method and device for making tissue
US5507917A (en) * 1994-05-24 1996-04-16 Beloit Technologies, Inc. Doctor for creping tissue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428473A1 (fr) * 1978-06-13 1980-01-11 Jagenberg Werke Ag Dispositif pour l'application continue d'une enduction sur une bande de materiau
US4919756A (en) * 1988-08-26 1990-04-24 The Procter & Gamble Company Method of and apparatus for compensatingly adjusting doctor blade
FR2641204A1 (fr) * 1988-12-30 1990-07-06 Valmet Paper Machinery Inc Dispositif pour commander l'angle d'inclinaison d'une racle
WO1993005229A1 (fr) * 1991-09-02 1993-03-18 Valmet-Karlstad Ab Appareil servant a regler le crepage d'un papier
WO1993006300A1 (fr) * 1991-09-16 1993-04-01 Valmet-Karlstad Ab Procede et dispositif pour le reglage des conditions de crepage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989234A2 (fr) * 1998-09-11 2000-03-29 Voith Sulzer Papiertechnik Patent GmbH Couteau racleur
EP0989234A3 (fr) * 1998-09-11 2000-11-15 Voith Sulzer Papiertechnik Patent GmbH Couteau racleur
AT16455U1 (de) * 2017-05-08 2019-10-15 Valmet Technologies Oy Vorrichtung zur bewegung eines tragbalkens

Also Published As

Publication number Publication date
EP0684338B1 (fr) 1999-09-29
DE4418464A1 (de) 1994-12-08
DE59506927D1 (de) 1999-11-04
EP0684338A3 (fr) 1997-04-23
ES2138107T3 (es) 2000-01-01
US5868841A (en) 1999-02-09
ATE185177T1 (de) 1999-10-15
DE4418464C2 (de) 1995-07-06

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