EP0702109A2 - Procédé et dispositif d'application en continu d'une enduction sur un matériau en bande - Google Patents

Procédé et dispositif d'application en continu d'une enduction sur un matériau en bande Download PDF

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Publication number
EP0702109A2
EP0702109A2 EP95111729A EP95111729A EP0702109A2 EP 0702109 A2 EP0702109 A2 EP 0702109A2 EP 95111729 A EP95111729 A EP 95111729A EP 95111729 A EP95111729 A EP 95111729A EP 0702109 A2 EP0702109 A2 EP 0702109A2
Authority
EP
European Patent Office
Prior art keywords
doctor
material web
doctor blade
actuator
doctor knife
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.)
Ceased
Application number
EP95111729A
Other languages
German (de)
English (en)
Other versions
EP0702109A3 (fr
Inventor
Norbert Gerhardt
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.)
Tzn Forschungs- und Entwicklungszentrum Unterluess GmbH
Original Assignee
Tzn Forschungs- und Entwicklungszentrum Unterluess 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 Tzn Forschungs- und Entwicklungszentrum Unterluess GmbH filed Critical Tzn Forschungs- und Entwicklungszentrum Unterluess GmbH
Publication of EP0702109A2 publication Critical patent/EP0702109A2/fr
Publication of EP0702109A3 publication Critical patent/EP0702109A3/fr
Ceased 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades

Definitions

  • the invention relates to a method for continuously applying a coating of constant thickness to a material web with an elastic doctor blade according to the preamble of claim 1.
  • the invention further relates to an apparatus for performing the method.
  • doctor knife also called a scraper or a blade
  • deposits can build up between the coating knife and the material web due to impurities in the coating material, which lead to a strip-like coating pattern (doctor blade strip) which reduces the quality of the paper.
  • a device for tensioning and prestressing an elastic doctor knife for coating systems wherein a structurally specially designed pressure medium hose is arranged on the side of the doctor knife facing the material web to adjust the prestressing force between the clamping device and the support bar. When pressurized, this presses the doctor blade away from the material web in the region between the clamping device and the support bar, so that the tip of the doctor blade located above the support bar is pressed toward the material web.
  • This document also does not contain any information as to how squeegee strips forming in the coating can be avoided.
  • the object of the present invention is to further develop a method of the type mentioned at the outset in such a way that the deposits which form between the doctor blade and the material web and then lead to doctor blades are prevented or eliminated in a simple and cost-effective manner.
  • a device for performing this method is also to be disclosed.
  • the invention is based on the idea of exciting the doctor blade to strong, low-frequency vibrations either at predetermined intervals or whenever there are doctor strips on the surface of the material web. As a result, the deposits between the doctor blade and the material web are crushed and rinsed out by the pressing coating.
  • the oscillation frequency of the doctor knife should be between 1 and 5 Hz, preferably 2 Hz.
  • a fluid e.g. Compressed air, fillable elastic element (actuator) used.
  • the pressure of the fluid is changed periodically so that the corresponding surface of the actuator is periodically enlarged and the doctor blade is thereby also pressed periodically to the material web.
  • an actuator that consists of a hose-like part that surrounds a metallic guide sleeve. At the ends of the guide sleeve, the hose is clamped between this sleeve and corresponding sleeve-like clamping elements surrounding the hose-like part.
  • the compressed air supply for inflating the hose-like part takes place via the one clamping element having a cavity, which is connected to a pressure source via a pressure hose.
  • the compressed air is then passed through the guide sleeve and a through opening in the outer wall of the guide sleeve into the space between the guide sleeve and the tubular part.
  • the second clamping element is closed on the back, so that the compressed air cannot escape through this element.
  • 1 denotes a doctor knife, which bears against a paper web 3 running over a counter-roller 2 with an excess of coating material 4 applied.
  • the doctor blade 1 is clamped in the region of its first end 5 in a clamping device 8 consisting of a support beam 6 and clamping beam 7.
  • a clamping device 8 consisting of a support beam 6 and clamping beam 7.
  • the doctor blade 1 can be supported on the side facing away from the paper web 3 with a support bar 10.
  • the support beam 6 has a recess 11 in which a filler 12 is located.
  • an elastic element (actuator) 14 according to the invention, which can be filled with compressed air, is provided in a corresponding recess 13, which rests on the doctor blade 1 on the side facing away from the recess 13 of the filler 12. In the arrangement shown in FIG. 1, practically no prestressing forces are exerted by the actuator 14 on the doctor blade 1.
  • a control device 16 activates a pressure control device 17 which acts on the actuator 14 with a periodically changing air pressure via a pressure hose 18.
  • the actuator 14 is subjected to the maximum pressure. Since the actuator 14 cannot expand in the direction of the filler 12, it presses against the doctor knife 1, so that its contact area on the paper web 3 is substantially enlarged. An air gap 19 is formed between a support bar 10 and doctor blade 1 and impurities which are located between the front end 9 of the doctor blade 1 and the paper web 3 are crushed and washed out by the coating material 4. As soon as the air pressure drops, the actuator 14 shrinks and the front end 9 of the doctor blade 1 hits the support bar 10.
  • FIG. 3 shows an embodiment of an actuator 14 according to the invention. It consists of a tubular part 20 (hereinafter also referred to as a tube), which surrounds a rigid (eg metallic) guide sleeve 21. At the ends of the guide sleeve 21, the hose 20 is between the guide sleeve 21 and corresponding sleeve-shaped clamping elements 22, 23 surrounding the hose 20 (for example metallic).
  • a tubular part 20 hereinafter also referred to as a tube
  • hose 20 is between the guide sleeve 21 and corresponding sleeve-shaped clamping elements 22, 23 surrounding the hose 20 (for example metallic).
  • the compressed air supply for inflating the hose 20 takes place in the direction of the arrow 24 via the clamping element 22 which has a cavity 25 and which has a flange 26 for fastening the pressure hose 18 (FIG. 1).
  • the compressed air then passes in the direction of arrow 27 into the interior 28 of the guide sleeve 21 and from there through an opening 29 in the outer wall 30 of the guide sleeve 21 into the exterior space located between the guide sleeve 21 and the hose 20.
  • the second clamping element 23 is closed on the rear side, so that the compressed air cannot escape on this side of the actuator 14.
  • the ends of the guide sleeve 21 and the corresponding inner walls of the tensioning elements 22, 23 are conical.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP95111729A 1994-09-16 1995-07-26 Procédé et dispositif d'application en continu d'une enduction sur un matériau en bande Ceased EP0702109A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433048A DE4433048A1 (de) 1994-09-16 1994-09-16 Verfahren und Vorrichtung zum kontinuierlichen Aufbringen einer Beschichtung auf eine Materialbahn
DE4433048 1994-09-16

Publications (2)

Publication Number Publication Date
EP0702109A2 true EP0702109A2 (fr) 1996-03-20
EP0702109A3 EP0702109A3 (fr) 1997-05-07

Family

ID=6528406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111729A Ceased EP0702109A3 (fr) 1994-09-16 1995-07-26 Procédé et dispositif d'application en continu d'une enduction sur un matériau en bande

Country Status (5)

Country Link
US (2) US5601868A (fr)
EP (1) EP0702109A3 (fr)
JP (1) JPH08108124A (fr)
DE (1) DE4433048A1 (fr)
FI (1) FI954317A7 (fr)

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DE19627688A1 (de) * 1996-07-10 1998-01-15 Jagenberg Papiertech Gmbh Dosiersystem für Vorrichtungen zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen
DE29617829U1 (de) * 1996-10-14 1997-01-23 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Auftragseinrichtung zum Auftragen eines Streichmediums
DE19715345A1 (de) * 1997-03-27 1998-10-01 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung einer gestrichenen Warenbahn, insbesondere aus Papier oder Karton
DE19753899A1 (de) 1997-12-05 1999-06-10 Jagenberg Papiertech Gmbh Pneumatisch betätigbares Stellelement, insbesondere zur Regulierung des Querprofils in einer Beschichtungsvorrichtung für Papier- oder Kartonbahnen
DE19934441A1 (de) * 1999-07-22 2001-01-25 Voith Paper Patent Gmbh Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
AU2001216453A1 (en) 2000-09-25 2002-04-08 Generis Gmbh Method for producing a part using a deposition technique
DE10049043A1 (de) * 2000-10-04 2002-05-02 Generis Gmbh Verfahren zum Entpacken von in ungebundenem Partikelmaterial eingebetteten Formkörpern
DE10117875C1 (de) * 2001-04-10 2003-01-30 Generis Gmbh Verfahren, Vorrichtung zum Auftragen von Fluiden sowie Verwendung einer solchen Vorrichtung
US6942904B2 (en) * 2001-12-11 2005-09-13 Ultra Technology Europe Ab Dry end surface treatment using ultrasonic transducers
DE10216013B4 (de) * 2002-04-11 2006-12-28 Generis Gmbh Verfahren und Vorrichtung zum Auftragen von Fluiden
DE10222167A1 (de) 2002-05-20 2003-12-04 Generis Gmbh Vorrichtung zum Zuführen von Fluiden
DE10224981B4 (de) * 2002-06-05 2004-08-19 Generis Gmbh Verfahren zum schichtweisen Aufbau von Modellen
US7807077B2 (en) * 2003-06-16 2010-10-05 Voxeljet Technology Gmbh Methods and systems for the manufacture of layered three-dimensional forms
DE10327272A1 (de) * 2003-06-17 2005-03-03 Generis Gmbh Verfahren zum schichtweisen Aufbau von Modellen
DE102004008168B4 (de) 2004-02-19 2015-12-10 Voxeljet Ag Verfahren und Vorrichtung zum Auftragen von Fluiden und Verwendung der Vorrichtung
DE102004029565A1 (de) * 2004-06-18 2006-01-05 Voith Paper Patent Gmbh Rakelvorrichtung
KR100677677B1 (ko) * 2004-12-15 2007-02-02 김종백 독터 블레이드 홀더
US8312834B2 (en) * 2005-04-14 2012-11-20 Hamilton Sundstrand Corporation Apparatus for applying thin coating
DE102005029613A1 (de) * 2005-06-23 2007-01-04 Voith Patent Gmbh Vorrichtung zur Dosierung und/oder Egalisierung
DE102006038858A1 (de) * 2006-08-20 2008-02-21 Voxeljet Technology Gmbh Selbstaushärtendes Material und Verfahren zum schichtweisen Aufbau von Modellen
DE102007050679A1 (de) 2007-10-21 2009-04-23 Voxeljet Technology Gmbh Verfahren und Vorrichtung zum Fördern von Partikelmaterial beim schichtweisen Aufbau von Modellen
DE102009030113A1 (de) 2009-06-22 2010-12-23 Voxeljet Technology Gmbh Verfahren und Vorrichtung zum Zuführen von Fluiden beim schichtweisen Bauen von Modellen
DE102010014969A1 (de) 2010-04-14 2011-10-20 Voxeljet Technology Gmbh Vorrichtung zum Herstellen dreidimensionaler Modelle
DE102010027071A1 (de) 2010-07-13 2012-01-19 Voxeljet Technology Gmbh Vorrichtung zum Herstellen dreidimensionaler Modelle mittels Schichtauftragstechnik
DE102010056346A1 (de) 2010-12-29 2012-07-05 Technische Universität München Verfahren zum schichtweisen Aufbau von Modellen
DE102011007957A1 (de) 2011-01-05 2012-07-05 Voxeljet Technology Gmbh Vorrichtung und Verfahren zum Aufbauen eines Schichtenkörpers mit wenigstens einem das Baufeld begrenzenden und hinsichtlich seiner Lage einstellbaren Körper
ITBO20110708A1 (it) * 2011-12-14 2013-06-15 Marchesini Group Spa Apparato per regolare il rilascio di compresse negli alveoli di un nastro termoformato
WO2014057568A1 (fr) 2012-10-11 2014-04-17 サンデン株式会社 Procédé permettant d'appliquer un revêtement permettant un coulissement sur un substrat en forme de disque
WO2021212110A1 (fr) 2020-04-17 2021-10-21 Eagle Engineered Solutions, Inc. Appareil et système d'étalement de poudre
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US12370741B2 (en) 2021-08-13 2025-07-29 General Electric Company Material deposition assembly for additive manufacturing
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US11813799B2 (en) 2021-09-01 2023-11-14 General Electric Company Control systems and methods for additive manufacturing
EP4249216A1 (fr) 2022-03-23 2023-09-27 General Electric Company Systèmes et procédés de fabrication additive
US12403654B2 (en) 2022-09-30 2025-09-02 General Electric Company Systems and methods for additive manufacturing

Citations (2)

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Publication number Priority date Publication date Assignee Title
US1566358A (en) 1924-09-05 1925-12-22 Vickerys 1920 Ltd Doctor for paper machines
DE3313972C2 (fr) 1983-04-18 1989-04-13 Jagenberg Ag, 4000 Duesseldorf, De

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DE3313972C2 (fr) 1983-04-18 1989-04-13 Jagenberg Ag, 4000 Duesseldorf, De

Also Published As

Publication number Publication date
US5746833A (en) 1998-05-05
EP0702109A3 (fr) 1997-05-07
JPH08108124A (ja) 1996-04-30
FI954317L (fi) 1996-03-17
FI954317A0 (fi) 1995-09-14
FI954317A7 (fi) 1996-03-17
US5601868A (en) 1997-02-11
DE4433048A1 (de) 1996-03-21

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