EP2175068A1 - Doctor blade for the paper industry - Google Patents

Doctor blade for the paper industry Download PDF

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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
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EP
European Patent Office
Prior art keywords
frame
mass
paper industry
doctor blade
union
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Granted
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EP08736715A
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German (de)
French (fr)
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EP2175068A4 (en
EP2175068B1 (en
Inventor
José Joaquín Amonarriz Azcolain
José Miguel Echeberria Goicoechea
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Individual
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Individual
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    • 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.

Abstract

Doctor blade for the paper industry, comprising a scraping plate (1) and holding means (p) for the scraping plate which in turn are held by a frame (a) the ends of which are securely fastened (2) by two fastening points (pf) to a stationary structure (f), characterized in that it comprises: a) mechanical means for adjustable fastening (3) between at least one end (2) of the frame and the stationary structure (f) in such a way that the distance (d) between the two fastening points (pf) can be varied by the user; and b) means for incorporating an additional mass (5) in adjustable quantities.

Description

L'industrie papetière utilise des docteurs ou racles comportant une lame racleuse qui rentre en contact avec le rouleau conducteur de papier correspondant.The paper industry uses doctors or scrapers with a scraper blade that comes into contact with the corresponding paper-conducting roll.

Les nécessités de rentabilité industrielle incitent à faire augmenter substantiellement avec le temps la vitesse de rotation du rouleau conducteur de papier, mais cette augmentation perturbe gravement le comportement de la racle.The necessities of industrial profitability make it necessary to substantially increase the speed of rotation of the paper-conducting roller with time, but this increase seriously disturbs the behavior of the doctor blade.

Le demandeur a étudié ces perturbations et a trouvé que la cause se trouve dans les vibrations que la racle enregistre avec l'augmentation de la vitesse du rouleau conducteur de papier.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.

La racle entre en vibration parce que sa fréquence naturelle coïncide avec la fréquence naturelle ou l'une des principales harmoniques de rotation des rouleaux conducteurs de papier.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.

Compte-tenu que plus la vitesse du rouleau conducteur de papier augmente, plus les fréquences d'excitation le font également, le demandeur en déduit qu'il faut augmenter la fréquence naturelle de la racle pour la maintenir toujours au dessus de toute fréquence d'excitation sur la machine à papier.Given that the speed of the paper-conducting roll increases, the higher the excitation frequencies do too, the applicant deduces that it is necessary to increase the natural frequency of the doctor to keep it always above any frequency of excitement on the paper machine.

Dans ses essais, le demandeur a vérifié que de façon approximative la fréquence naturelle de la racle (H) est régie par la fonction suivante : H = f (1/d2), (d) étant la distance entre appuis de l'ensemble de la racle.In his tests, the applicant verified that approximately the natural frequency of the doctor blade (H) is governed by the following function: H = f (1 / d 2 ), (d) being the distance between supports of the assembly of the squeegee.

Jusqu'à présent, les appuis de la racle se réalisaient d'une manière fixe à une structure fixe, de façon à que la distance entre les points de fixation était également fixe et de ce fait, une augmentation de la vitesse du rouleau conducteur de papier faisait vibrer la racle.Until now, the squeegee supports were fixed in a fixed manner to a fixed structure, so that the distance between the fixing points was also fixed and therefore an increase in the speed of the driving roller of paper made the squeegee vibrate.

Le demandeur a développé une racle sur laquelle la distance entre appuis/points de fixation est variable/réglable à volonté, ce qui implique pour la racle une durée de vie plus longue du fait qu'elle s'adapte aux vitesses du rouleau conducteur de papier que demande l'usager, l'économie et l'industriel.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.

Le demandeur a aussi constaté dans ses essais que la fréquence naturelle de la racle est influencée par la masse du bâti, le mode d'union de cette masse au bâti et que les vibrations créées peuvent être réduites avec l'ajout d'éléments amortisseurs ou d'excitations contrôlées. La racle objet de la demande se caractérise donc aussi parce que :

  • Le bâti comporte des moyens pour accueillir une masse supplémentaire en quantité réglable ;
  • Elle comporte des moyens pour régler la position de la masse supplémentaire sur le bâti ;
  • Elle comporte des moyens pour régler la rigidité de l'union entre la masse supplémentaire et le bâti ; et
  • L'union entre la masse supplémentaire et le bâti comporte un élément amortisseur.
  • Elle comporte des moyens actifs qui introduisent des excitations en fonction des vibrations, des accélérations et/ou des déformations mesurées.
The Applicant has also found in his tests that the natural frequency of the doctor blade is influenced by the mass of the frame, the method of union of this mass to the frame and that the vibrations created can be reduced with the addition of damping elements or of controlled excitations. The scrap object of the application is therefore also characterized because:
  • The frame comprises means for accommodating an additional mass in an adjustable quantity;
  • It comprises means for adjusting the position of the additional mass on the frame;
  • It comprises means for adjusting the stiffness of the union between the additional mass and the frame; and
  • The union between the additional mass and the frame comprises a damping element.
  • It comprises active means that introduce excitations as a function of vibrations, accelerations and / or measured deformations.

Pour mieux comprendre l'objet de la présente invention, celle-ci est représentée sur les plans sous une forme préférentielle de réalisation pratique, susceptible de changements accessoires ne dénaturant pas son fondement.To better understand the object of the present invention, it is shown in the plans in a preferred embodiment of practical embodiment, susceptible of incidental changes not denaturing its foundation.

La figure 1 illustre un exemple de la façon de modifier la distance entre appuis sur une racle, suivant l'invention. Sur la figure 1a, les supports de la racle (3) ont été fixés à la structure fixe et écartés (d) le plus possible à l'extérieur, alors que sur la figure 1b, ils ont été placés le plus possible à l'intérieur.The figure 1 illustrates an example of how to change the distance between supports on a doctor blade, according to the invention. On the figure 1a 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.

La figure 2 montre un bâti(1) similaire à celui de la figure 1, avec la seule différence qu'il comporte une ouverture (4) -figure 2a-afin de pouvoir y fixer une masse (5) -figure 2b-.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 -.

La figure 3 montre un bâti (1) avec une masse (5) à l'intérieur et avec une position axiale réglable de celle-ci.The figure 3 shows a frame (1) with a mass (5) inside and with an adjustable axial position thereof.

Les figures 4a et 4b montrent la masse (5) fixée au bâti avec une union flexible (13).The Figures 4a and 4b show the mass (5) fixed to the frame with a flexible union (13).

Sur la figure 4b, en plus de feuillards (13) à l'intérieur, des feuillards (13) ont été placés à l'extérieur de manière à augmenter la rigidité de l'union.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.

La figure 5 montre la même configuration structurelle de la figure 4, mais avec une masse (5) de moindre valeur.The figure 5 shows the same structural configuration of the figure 4 , but with a mass (5) of lesser value.

La figure 6 montre un exemple de réalisation utilisant des ballons pneumatiques (10) pour supporter une masse (5).The figure 6 shows an exemplary embodiment using pneumatic balloons (10) for supporting a mass (5).

La figure 7 montre un autre exemple de réalisation, dans laquelle la masse (5) est fixée au bâti (1) avec un matériau amortisseur (12) entre les deux éléments.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.

La figure 8 montre un exemple de réalisation dans laquelle un excitateur ou actionneur (13) a été rajouté au bâti (1), où sont mesurées les vibrations, les accélérations et/ou les déplacements grâce à un détecteur (14). Le système comporte également un contrôleur qui fait fonctionner l'actionneur ou excitateur en fonction des mesures enregistrées dans le détecteur.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.

Un exemple de réalisation pratique, non limitative, de la présente invention est décrit ci-après.An exemplary practical, non-limiting embodiment of the present invention is described below.

La racle pour l'industrie papetière objet de l'invention, comme il apparaît sur les figures 1a et 1b, est une racle comportant une lame racleuse (1), des moyens porteurs (p) de la lame racleuse (1) qui à leur tour sont portés par un bâti (a) dont les extrémités (2) sont fixées à deux points de fixation (pf) sur une structure fixe (f).The squeegee for the paper industry object of the invention, as it appears on the figures 1a and 1b , 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).

D'après l'invention, la racle pour l'industrie papetière comporte des moyens mécaniques de fixation réglable (3) entre, au moins, une extrémité (2) du bâti et la structure fixe (f) de façon à ce que la distance (d) entre les deux points de fixation (pf) soit variable à la volonté de l'utilisateur.According to the invention, 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.

Les figures 1a et 1b illustrent les supports (3), (3') de la racle sur deux positions extrêmes possibles pour cet exemple de réalisation.The figures 1a and 1b illustrate the supports (3), (3 ') of the doctor blade on two possible extreme positions for this embodiment.

D'autre part, le fait de fixer rigidement une masse (5) sur une position du bâti (1) permet de modifier le comportement dynamique de celle-ci, de manière à ce que, en fonction de la vitesse de papier à utiliser, on choisira s'il faut fixer la masse (5) ou non. En général, la fréquence naturelle diminuera avec l'introduction de la masse (5) dans le bâti (1).On the other hand, 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. In general, the natural frequency will decrease with the introduction of the mass (5) in the frame (1).

Les bâtis (1) des racles sont des structures creuses, ce qui permet d'introduire une masse (5) à l'intérieur. Dans certains cas, cette masse (5) pourrait aussi être fixée à l'extérieur, à condition que l'espace disponible pour le bâti (1) sur la machine à papier le permette.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.

Les figures 2 à 7 suivantes montrent différents exemples de réalisation avec diverses dispositions de la masse (5) sur le bâti (1).The Figures 2 to 7 following show different embodiments with various provisions of the mass (5) on the frame (1).

Dans l'exemple de réalisation de racle avec masse (5) fixée, dont la position peut être réglée, le comportement dynamique de la structure du bâti (1) peut être modifié avec le déplacement de cette masse (5) à l'intérieur du bâti (1). Le comportement dynamique de la structure pourrait même être réglé avec la machine à papier en marche.In the embodiment of 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.

Une masse (5) réglable en position peut être réalisée de multiples manières :A mass (5) adjustable in position can be achieved in multiple ways:

L'exemple de réalisation de la figure 3 montre un bâti (1) dans laquelle une masse (5) a été introduite dans le creux de l'intérieur. Le contact entre la masse (5) et le bâti (1) est possible grâce à un guidage (9). La position axiale de la masse (5) peut être contrôlée par un actionnement (8). Sur la figure 3, cet actionnement se réalise à travers un câble.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.

L'exemple de réalisation des figures 4a, 4b montre la racle avec masse (5) fixée flexiblement. Grâce à la modification de la valeur de la masse (5) ou de la flexibilité de l'union réalisée, on peut modifier le comportement dynamique de la structure.The exemplary embodiment of Figures 4a , 4b shows the squeegee with mass (5) fixed flexibly. Thanks to the modification of the value of the mass (5) or the flexibility of the realized union, one can modify the dynamic behavior of the structure.

Une solution avec laquelle il est nécessaire d'arrêter la machine pour modifier le comportement consiste à introduire à l'intérieur du bâti (1), où une ouverture a été réalisée, le dispositif avec la masse (5) contrôlée et avec une union contrôlée en rigidité.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.

Il peut y avoir des solutions avec lesquelles il est nécessaire d'arrêter la machine pour modifier le comportement ou des solutions plus compliquées permettant de modifier le comportement dynamique avec la machine en marche.There may be solutions with which it is necessary to stop the machine to change the behavior or more complicated solutions to change the dynamic behavior with the machine running.

La figure 4 montre une manière d'unir la masse (5) à la structure du bâti (1) en contrôlant la rigidité de cette union. L'union de la partie supérieure et l'union de la partie inférieure présentent une rigidité différente et par conséquent le comportement dynamique du système sera différent. Cette configuration permet de réaliser un bâti (1) avec une multitude de comportements dynamiques, étant donné qu'il peut se monter :

  1. a) Sans masse (5).
  2. b) Avec la masse (5) unie avec quatre feuillards (13).
  3. c) Avec la masse (5) unie avec huit feuillards (13).
  4. d) En réalisant le montage de la masse (5) avec des feuillards (13) d'épaisseurs différentes.
The figure 4 shows a way of uniting the mass (5) to the structure of the frame (1) by controlling the rigidity of this union. The union of the upper part and the union of the lower part have a different rigidity and therefore the dynamic behavior of the system will be different. This configuration makes it possible to make a frame (1) with a multitude of dynamic behaviors, since it can be mounted:
  1. a) Without mass (5).
  2. b) With mass (5) united with four strips (13).
  3. c) With mass (5) united with eight strips (13).
  4. d) By mounting the mass (5) with strips (13) of different thicknesses.

De même que la modification de la rigidité, on considère aussi la modification de la masse (5). Par exemple, on pourrait réaliser un montage de la partie inférieure de la figure 4 puis un montage avec une masse (5) d'une valeur inférieure. Par exemple, une masse (5) avec la même géométrie mais trouée, comme indiqué sur la figure 5.As the modification of the rigidity, one also considers the modification of the mass (5). For example, we could make a montage of the lower part of the figure 4 then an assembly with a mass (5) of a lower value. For example, a mass (5) with the same geometry but holes, as indicated on the figure 5 .

La figure 6 illustre une autre manière de réaliser un support flexible, avec l'utilisation de ballons pneumatiques (10) supportant une masse (5). Les deux ballons pneumatiques (10) de la figure 6 sont fixés à une masse (5), et la face libre (11) des ballons (10) est fixée au bâti (1) de la racle. La rigidité avec laquelle la masse (11) est unie au bâti (1) dépend de la pression pneumatique à laquelle sont soumis les ballons pneumatiques (10). La modification contrôlée de la pression avec une armoire pneumatique permettra par conséquent de modifier le comportement dynamique du bâti (1) et il ne sera pas nécessaire d'arrêter la machine pour modifier le comportement dynamique du système.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.

Une autre solution, représentée sur la figure 7, consiste à fixer contre le bâti (1), une masse (5) en plaçant entre les deux un matériau amortisseur (12).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).

L'utilisation d'une masse fixée flexiblement avec un élément amortisseur (12) (élastomères, Viton...), permet de réduire l'amplitude des vibrations. Sur la réalisation de la figure 4, par exemple, si le matériau du feuillard (13) possède une qualité d'amortissement élevée, en plus de modifier la valeur de la fréquence naturelle, cela permettra de réduire l'amplitude de la vibration que subira la racle.The use of a mass fixed flexibly with a damping element (12) (elastomers, Viton ...), makes it possible to reduce the amplitude of the vibrations. On the realization of the figure 4 for example, if the material of the strip (13) has a high damping quality, in addition to modifying the value of the natural frequency, this will reduce the amplitude of the vibration that will undergo the squeegee.

La figure 8 représente une autre solution utilisant un excitateur (13) fixé sur le bâti (1). Un ou plusieurs détecteurs (14) et un contrôleur (15) sont ajoutés au système.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.

L'introduction de forces sur le bâti en fonction des mesures réalisées permet de réduire ou de supprimer les problèmes dynamiques pouvant apparaître sur le système.The introduction of forces on the frame as a function of the measurements made makes it possible to reduce or eliminate the dynamic problems that may appear on the system.

Claims (6)

Racle pour l'industrie papetière, comportant une lame racleuse (1) et des moyens porteurs (p) de la lame racleuse qui à leur tour sont portés par un bâti (a) dont les extrémités (2) sont fixées à deux points de fixation (pf) sur une structure fixe (f), caractérisée par le fait qu'elle comporte des moyens mécaniques de fixation réglable (3) entre au moins une extrémité (2) du bâti et la structure fixe (f), de façon à ce que la distance (d) entre les deux points de fixation (pf) soit variable à la volonté de l'utilisateur.Racle for the paper industry, comprising a scraper blade (1) and carrier means (p) of the scraper blade which in turn are carried by a frame (a) whose ends (2) are fixed at two attachment points (pf) on a fixed structure (f), characterized in that it comprises adjustable mechanical fastening means (3) between at least one end (2) of the frame and the fixed structure (f), so that that the distance (d) between the two fixing points (pf) is variable at the will of the user. Racle pour l'industrie papetière, suivant la revendication précédente, caractérisée par le fait que le bâti (a) comporte des moyens pour accueillir une masse supplémentaire (5) en quantité réglable.Racle for the paper industry, according to the preceding claim, characterized in that the frame (a) comprises means for accommodating an additional mass (5) in an adjustable quantity. Racle pour l'industrie papetière, suivant la revendication 2, caractérisée par le fait qu'elle comporte des moyens pour régler la position de la masse supplémentaire (5) sur le bâti (a).The paper industry as claimed in claim 2, characterized in that it comprises means for adjusting the position of the additional mass (5) on the frame (a). Racle pour l'industrie papetière, suivant les revendications précédentes, caractérisée par le fait qu'elle comporte des moyens pour régler la rigidité de l'union entre la masse supplémentaire (5) et le bâti (a).A collapse for the paper industry, according to the preceding claims, characterized in that it comprises means for adjusting the rigidity of the union between the supplementary mass (5) and the frame (a). Racle pour l'industrie papetière, suivant les revendications précédentes, caractérisée par le fait que l'union entre la masse supplémentaire (5) et le bâti (a) comporte un élément amortisseur (12).Racle for the paper industry, according to the preceding claims, characterized in that the union between the additional mass (5) and the frame (a) comprises a damping element (12). Racle pour l'industrie papetière, suivant les revendications précédentes, caractérisée par le fait qu'elle dispose d'un excitateur (13), un détecteur (14) et un contrôleur (15).Racle for the paper industry, according to the preceding claims, characterized in that it has an exciter (13), a detector (14) and a controller (15).
EP08736715A 2007-07-24 2008-02-27 Doctor blade for the paper industry Not-in-force EP2175068B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200702059A ES2311416B1 (en) 2007-07-24 2007-07-24 DOCTOR FOR THE PAPER INDUSTRY.
PCT/ES2008/000113 WO2009013364A1 (en) 2007-07-24 2008-02-27 Doctor blade for the paper industry

Publications (3)

Publication Number Publication Date
EP2175068A1 true EP2175068A1 (en) 2010-04-14
EP2175068A4 EP2175068A4 (en) 2010-08-04
EP2175068B1 EP2175068B1 (en) 2011-07-13

Family

ID=40260998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08736715A Not-in-force EP2175068B1 (en) 2007-07-24 2008-02-27 Doctor blade for the paper industry

Country Status (8)

Country Link
US (1) US7947152B2 (en)
EP (1) EP2175068B1 (en)
CN (1) CN101809228B (en)
AT (1) ATE516406T1 (en)
BR (1) BRPI0813871A2 (en)
CA (1) CA2691800C (en)
ES (1) ES2311416B1 (en)
WO (1) WO2009013364A1 (en)

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US8048265B2 (en) * 2006-05-25 2011-11-01 Jose Joaquin Amonarria Azcolain Creping and cutting procedure and equipment

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Publication number Priority date Publication date Assignee Title
CN110219196B (en) * 2019-06-08 2020-12-04 江苏永玖纸业有限公司 Corrugated paper plastify fine splitter of paper
CN113714048A (en) * 2021-08-23 2021-11-30 深圳聚德机械有限公司 Auxiliary stabilizing device for preventing scraper from oscillating

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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
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EP0807710A1 (en) * 1996-05-13 1997-11-19 Voith Sulzer Papiermaschinen GmbH Process and device for direct or indirect application of a liquid or pasty media on a running material web,in particularly of paper or board
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 (en) * 2004-02-13 2005-08-24 Voith Paper Patent GmbH Damping of a doctor

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Also Published As

Publication number Publication date
US20100300638A1 (en) 2010-12-02
ES2311416A1 (en) 2009-02-01
ES2311416B1 (en) 2009-12-03
CA2691800C (en) 2014-04-01
CA2691800A1 (en) 2009-01-29
EP2175068A4 (en) 2010-08-04
CN101809228B (en) 2011-08-31
CN101809228A (en) 2010-08-18
EP2175068B1 (en) 2011-07-13
BRPI0813871A2 (en) 2015-01-06
WO2009013364A8 (en) 2010-03-04
WO2009013364A1 (en) 2009-01-29
US7947152B2 (en) 2011-05-24
ATE516406T1 (en) 2011-07-15

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