EP2175068A1 - Rakel für papierindustrie - Google Patents
Rakel für papierindustrie Download PDFInfo
- Publication number
- EP2175068A1 EP2175068A1 EP08736715A EP08736715A EP2175068A1 EP 2175068 A1 EP2175068 A1 EP 2175068A1 EP 08736715 A EP08736715 A EP 08736715A EP 08736715 A EP08736715 A EP 08736715A EP 2175068 A1 EP2175068 A1 EP 2175068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- mass
- paper industry
- doctor blade
- union
- 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
Links
Images
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 paper industry uses doctors or scrapers with a scraper blade that comes into contact with the corresponding paper-conducting roll.
- the Applicant has studied these disturbances and found that the cause lies in the vibrations that the scraper records with the increase in the speed of the paper-conducting roll.
- the doctor blade vibrates because its natural frequency coincides with the natural frequency or one of the main rotational harmonics of the paper-conducting rolls.
- H f (1 / d 2 ), (d) being the distance between supports of the assembly of the squeegee.
- Applicant has developed a squeegee on which the distance between supports / fixing points is variable / adjustable at will, which implies for squeegee a longer life because it adapts to the speeds of the paper conductive roller what the user, the economy and the industry demand.
- the figure 1 illustrates an example of how to change the distance between supports on a doctor blade, according to the invention.
- the squeegee supports (3) have been fixed to the fixed structure and spaced apart (d) as much as possible on the outside, while on the figure 1b they were placed as much as possible inside.
- the figure 2 shows a frame (1) similar to that of the figure 1 , with the only difference that it has an opening (4) - figure 2a -to be able to fix a mass (5) - figure 2b -.
- the figure 3 shows a frame (1) with a mass (5) inside and with an adjustable axial position thereof.
- FIGS. 4a and 4b show the mass (5) fixed to the frame with a flexible union (13).
- straps (13) On the figure 4b in addition to strips (13) on the inside, straps (13) have been placed outside so as to increase the rigidity of the union.
- the figure 5 shows the same structural configuration of the figure 4 , but with a mass (5) of lesser value.
- the figure 6 shows an exemplary embodiment using pneumatic balloons (10) for supporting a mass (5).
- the figure 7 shows another embodiment, wherein the mass (5) is fixed to the frame (1) with a damping material (12) between the two elements.
- the figure 8 shows an exemplary embodiment in which an exciter or actuator (13) has been added to the frame (1), where the vibrations, accelerations and / or displacements are measured by means of a detector (14).
- the system also includes a controller that operates the actuator or exciter according to the measurements recorded in the detector.
- the squeegee for the paper industry object of the invention is a doctor blade comprising a scraper blade (1), carrier means (p) of the scraper blade (1) which in turn are carried by a frame (a) whose ends (2) are fixed at two attachment points (pf) on a fixed structure (f).
- the squeegee for the paper industry comprises adjustable mechanical fixing means (3) between, at least, one end (2) of the frame and the fixed structure (f) so that the distance (d) between the two attachment points (pf) is variable at the will of the user.
- the figures 1a and 1b illustrate the supports (3), (3 ') of the doctor blade on two possible extreme positions for this embodiment.
- the fact of rigidly fixing a mass (5) on a position of the frame (1) allows to modify the dynamic behavior thereof, so that, depending on the speed of paper to be used, we will choose whether to fix the mass (5) or not.
- the natural frequency will decrease with the introduction of the mass (5) in the frame (1).
- the frames (1) squeegee are hollow structures, which allows to introduce a mass (5) inside. In some cases, this mass (5) could also be fixed to the outside, provided that the space available for the frame (1) on the paper machine allows it.
- doctor blade with mass (5) fixed whose position can be adjusted
- the dynamic behavior of the structure of the frame (1) can be modified with the displacement of this mass (5) within the built (1).
- the dynamic behavior of the structure could even be adjusted with the paper machine running.
- a mass (5) adjustable in position can be achieved in multiple ways:
- the exemplary embodiment of the figure 3 shows a frame (1) in which a mass (5) has been introduced into the hollow of the interior.
- the contact between the mass (5) and the frame (1) is possible thanks to a guide (9).
- the axial position of the mass (5) can be controlled by an actuation (8). On the figure 3 this actuation is carried out through a cable.
- a solution with which it is necessary to stop the machine to modify the behavior consists in introducing inside the frame (1), where an opening has been made, the device with mass (5) controlled and with a controlled union in rigidity.
- the figure 6 illustrates another way of producing a flexible support, with the use of pneumatic balloons (10) supporting a mass (5).
- the two pneumatic balloons (10) of the figure 6 are fixed to a mass (5), and the free face (11) of the balloons (10) is fixed to the frame (1) of the doctor blade.
- the rigidity with which the mass (11) is joined to the frame (1) depends on the pneumatic pressure to which the pneumatic balloons (10) are subjected. Controlled modification of the pressure with a pneumatic cabinet will consequently modify the dynamic behavior of the frame (1) and it will not be necessary to stop the machine to modify the dynamic behavior of the system.
- Another solution, represented on the figure 7 is to fix against the frame (1), a mass (5) by placing between the two a damping material (12).
- the figure 8 represents another solution using an exciter (13) fixed on the frame (1).
- One or more detectors (14) and a controller (15) are added to the system.
Landscapes
- Paper (AREA)
- Crushing And Pulverization Processes (AREA)
- Centrifugal Separators (AREA)
- Food-Manufacturing Devices (AREA)
- Coating Apparatus (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200702059A ES2311416B1 (es) | 2007-07-24 | 2007-07-24 | Doctor para la industria papelera. |
PCT/ES2008/000113 WO2009013364A1 (es) | 2007-07-24 | 2008-02-27 | Doctor para la industria papelera |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2175068A1 true EP2175068A1 (de) | 2010-04-14 |
EP2175068A4 EP2175068A4 (de) | 2010-08-04 |
EP2175068B1 EP2175068B1 (de) | 2011-07-13 |
Family
ID=40260998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08736715A Not-in-force EP2175068B1 (de) | 2007-07-24 | 2008-02-27 | Schaber für die papierindustrie |
Country Status (8)
Country | Link |
---|---|
US (1) | US7947152B2 (de) |
EP (1) | EP2175068B1 (de) |
CN (1) | CN101809228B (de) |
AT (1) | ATE516406T1 (de) |
BR (1) | BRPI0813871A2 (de) |
CA (1) | CA2691800C (de) |
ES (1) | ES2311416B1 (de) |
WO (1) | WO2009013364A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8048265B2 (en) * | 2006-05-25 | 2011-11-01 | Jose Joaquin Amonarria Azcolain | Creping and cutting procedure and equipment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110219196B (zh) * | 2019-06-08 | 2020-12-04 | 江苏永玖纸业有限公司 | 一种瓦楞纸塑化纸纤分离设备 |
CN113714048A (zh) * | 2021-08-23 | 2021-11-30 | 深圳聚德机械有限公司 | 一种防止刮刀振荡的辅助平稳装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807710A1 (de) * | 1996-05-13 | 1997-11-19 | Voith Sulzer Papiermaschinen GmbH | Verfahren und Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton |
WO2004005614A1 (en) * | 2002-07-04 | 2004-01-15 | Metso Paper, Inc. | Method and apparatus for controlling vibrations of a blade beam of a coating station |
WO2004005615A1 (en) * | 2002-07-04 | 2004-01-15 | Metso Paper, Inc. | Method and apparatus for damping vibrations of a blade beam of a coating station |
EP1566481A1 (de) * | 2004-02-13 | 2005-08-24 | Voith Paper Patent GmbH | Schaberdämpfung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3087184A (en) * | 1960-11-17 | 1963-04-30 | Lodding Engineering Corp | Vibratory doctor mechanism |
DE3421632C2 (de) * | 1984-06-09 | 1986-07-03 | Küsters, Eduard, 4150 Krefeld | Vorrichtung zum oszillierenden Linearantrieb eines mit einer umlaufenden Walze oder dergleichen zusammenwirkenden Bauteils |
EP1149202B1 (de) * | 1999-01-29 | 2004-05-26 | Thermo Web Systems, Inc. | Befestigungsvorrichtung für eine schaberklinge |
FI105576B (fi) * | 1999-02-03 | 2000-09-15 | Valmet Corp | Kaavinlaitteisto paperikoneen/kartonkikoneen telan/sylinterin yhteydessä |
FI114328B (fi) * | 2003-01-30 | 2004-09-30 | Metso Paper Inc | Komposiittirakenteinen käsittelylaitteisto |
FI114557B (fi) * | 2003-03-14 | 2004-11-15 | Metso Paper Inc | Palkin sisältävä paperikoneen käsittelylaitteisto |
-
2007
- 2007-07-24 ES ES200702059A patent/ES2311416B1/es not_active Expired - Fee Related
-
2008
- 2008-02-27 US US12/599,801 patent/US7947152B2/en not_active Expired - Fee Related
- 2008-02-27 BR BRPI0813871-0A2A patent/BRPI0813871A2/pt not_active IP Right Cessation
- 2008-02-27 WO PCT/ES2008/000113 patent/WO2009013364A1/es active Application Filing
- 2008-02-27 AT AT08736715T patent/ATE516406T1/de not_active IP Right Cessation
- 2008-02-27 CN CN2008801083767A patent/CN101809228B/zh not_active Expired - Fee Related
- 2008-02-27 EP EP08736715A patent/EP2175068B1/de not_active Not-in-force
- 2008-02-27 CA CA2691800A patent/CA2691800C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807710A1 (de) * | 1996-05-13 | 1997-11-19 | Voith Sulzer Papiermaschinen GmbH | Verfahren und Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton |
WO2004005614A1 (en) * | 2002-07-04 | 2004-01-15 | Metso Paper, Inc. | Method and apparatus for controlling vibrations of a blade beam of a coating station |
WO2004005615A1 (en) * | 2002-07-04 | 2004-01-15 | Metso Paper, Inc. | Method and apparatus for damping vibrations of a blade beam of a coating station |
EP1566481A1 (de) * | 2004-02-13 | 2005-08-24 | Voith Paper Patent GmbH | Schaberdämpfung |
Non-Patent Citations (1)
Title |
---|
See also references of WO2009013364A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8048265B2 (en) * | 2006-05-25 | 2011-11-01 | Jose Joaquin Amonarria Azcolain | Creping and cutting procedure and equipment |
Also Published As
Publication number | Publication date |
---|---|
BRPI0813871A2 (pt) | 2015-01-06 |
WO2009013364A8 (es) | 2010-03-04 |
US7947152B2 (en) | 2011-05-24 |
EP2175068A4 (de) | 2010-08-04 |
ATE516406T1 (de) | 2011-07-15 |
ES2311416A1 (es) | 2009-02-01 |
US20100300638A1 (en) | 2010-12-02 |
EP2175068B1 (de) | 2011-07-13 |
CN101809228B (zh) | 2011-08-31 |
ES2311416B1 (es) | 2009-12-03 |
CA2691800C (en) | 2014-04-01 |
CN101809228A (zh) | 2010-08-18 |
CA2691800A1 (en) | 2009-01-29 |
WO2009013364A1 (es) | 2009-01-29 |
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