WO2017148477A1 - Lame de couchage refroidie d'un dispositif à racle - Google Patents

Lame de couchage refroidie d'un dispositif à racle Download PDF

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Publication number
WO2017148477A1
WO2017148477A1 PCT/DE2017/100172 DE2017100172W WO2017148477A1 WO 2017148477 A1 WO2017148477 A1 WO 2017148477A1 DE 2017100172 W DE2017100172 W DE 2017100172W WO 2017148477 A1 WO2017148477 A1 WO 2017148477A1
Authority
WO
WIPO (PCT)
Prior art keywords
doctor
metering system
bed
coolant
rod
Prior art date
Application number
PCT/DE2017/100172
Other languages
German (de)
English (en)
Inventor
Reinhard Knop
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 WO2017148477A1 publication Critical patent/WO2017148477A1/fr

Links

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
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/005—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material incorporating means for heating or cooling the liquid or other fluent material
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters

Definitions

  • the invention relates to a doctor metering system for a device for coating aterialbahnen, in particular paper or board webs, which are supported on a rotating mating roller, with a metering rod as dosing, which is mounted in a groove of a Rakeibettes attached to the frame of the system is, according to the features of the preamble of claim 1.
  • a generic doctor metering system is known from DE 10 2011 112 956 A1.
  • an application system (such as a nozzle applicator, roller applicator or the like) is arranged, from which the coating material is applied in excess to the web directly or during indirect metering onto the roller.
  • an application chamber is arranged in a known manner, which is bounded on the inlet side by an overflow plate, wherein in the application chamber opens a supply line through which the coating material is supplied in the shunt. The excess may expire, whereas the amount desired for the coating is scraped off by means of a doctor bar, a doctor blade or the like.
  • the invention is therefore based on the object to remedy these disadvantages and to produce a completely smooth or almost perfectly smooth surface of the coated material web.
  • the region of the coolant rod is designed to be lowerable in temperature than the metering rod. It is the area bounded by the material web and the doctor bed in addition to the squeegee bar.
  • the coolant is supplied to the area by means of a device.
  • the coolant may be or contain cooling air or cold mist, which is blown into this area, preferably over the entire longitudinal extent of the rocket bar. By reducing the temperature level in this area, particle formations of the coating material are avoided, so that a smooth or almost completely smooth surface of the coated material web is established.
  • the area in the direction of rotation of the counter roll behind the coating blade, the doctor bar or the like is cooled.
  • the cooling of this area can be done in various ways. On the one hand, it is conceivable that a cooling of this area behind the coating blade (behind the doctor rod) with cooling air, for example by means of cold mist takes place, which is preferably blown into this area over the entire longitudinal extent of the doctor rod.
  • it can be thought of additionally or alternatively to cool the doctor bar (or the coating blade) itself and / or to cool the doctor bed in which the doctor rod is held.
  • the doctor rod is lowered in temperature by means of coolant.
  • the adjoining the doctor bar part of the doctor bed can be lowered by means of coolant temperature.
  • the cooling can take place by means of an internal or external line along the doctor bar or the doctor bed.
  • the conduit may have openings or a longitudinal slot to which liquid or gaseous coolant is supplied.
  • the described cooling measures may be single, double or common, i. all three measures at the same time.
  • Figure 1 a cross section through a doctor metering with a doctor bar and a receiving this doctor bed.
  • FIG. 1 shows by way of example a cross section through a doctor metering system with a doctor bed which has an extended foot clamp for clamping, as is known from DE 10 2011 112 956 A1.
  • 1 denotes a material web, preferably a paper or board web, which belongs to a metering system which is part of a device for coating the web with coating color.
  • the material web is supported by a mating roll 2, wherein in the direction of rotation of the mating roll 2 before the metering a known application system (nozzle, roller applicator or the like) is arranged, from the coating color in excess to the material web 1 or - with indirect metering - on the counter roll. 2 is applied.
  • nozzle, roller applicator or the like Before the dosing an application chamber 15 is arranged, the inlet side of an overflow plate 16 is limited. In the application chamber 15 opens a supply line 17 through which coating material is supplied. The excess coating material passes through the gap between the overflow plate 16 and the web 1.
  • the doctor metering system has a doctor bar 3 which is rotatably mounted in a doctor bed 4 which is partially open towards the material web 1 by means of a rotary drive.
  • the lateral surface of the doctor bar 3 is either smooth or provided with circumferential grooves.
  • the length of the doctor bar 3 corresponds to the working width of the coating device.
  • the doctor bar 3 is preferably made of stainless steel, wherein the lateral surface is wear-resistant coated, for example, chromed or provided with ceramic. It may be at least partially hollow to produce a passage for coolant.
  • the Rakeibett 4 is made of an at least limited elastic material. Suitable materials are elastomers, preferably polyurethane or polyethylene. The hardness of the material is chosen so that the doctor bed 4 can bear sealingly against the doctor bar 3 in order to prevent the penetration of coating color into the doctor bed 4.
  • the doctor bed 4 has a groove into which the doctor bar 3 is inserted, wherein the doctor bed 4, the doctor bar 3 in an angular range of at least 180 °.
  • the doctor bed 4 is provided over the length of the doctor bar 3 with a constant cross-section. It contains at least one channel 6 which is open toward the doctor rod and into which water is introduced as lubricant and cleaning agent during operation.
  • the doctor bed 4 is provided with a foot-like part 8, which is aligned approximately parallel to the frame 9 of the system.
  • a support member 7 is arranged on which in the amount of the squeegee rod 3, a pressure hose 11 is attached, which serves to adjust the contact pressure of the squeegee rod 3.
  • the pressure hose 11 is supported on a profile rail 21 mounted in the frame 9, which can be adjusted by means of screws 22 in the direction of the pressure hose back and forth.
  • a foot 12 is arranged, which serves to clamp the support member 7 in the frame. Between the foot 12 and the frame 9, a clamping hose 14 is installed, which clamps the foot 12 and the part 8 with the frame 9 after exposure to air.
  • the region B is cooled behind the doctor rod 3 and between the doctor bed 4 and the material web 1 or counter roller 2.
  • the cooling ie the reduction of the temperature level at this point compared to the temperature level in front of the doctor bar 3 causes no disturbing particles in the coating or in this area can arise.
  • the cooling of the region B takes place, for example, in that a cooling medium, for example cold mist, is conducted into this region via suitable supply means.
  • the doctor bar 3 is cooled.
  • the doctor bed 4 or a portion thereof preferably, which is located in the direction of rotation behind the doctor bar 3, cooled.
  • the cooling of the doctor bar 3 or of the doctor bed 4 can be effected by directing towards the region B a longitudinally aligned opening or a longitudinal slot through which a cooling medium (liquid or gaseous) is supplied.
  • the web to be coated 1 are shown, which are supported by a counter-roller 2 and rotated in the direction of the arrow.
  • the coating material present in the application chamber 15 eg coating color
  • the desired layer thickness of the coating material is adjusted when the web 1 in the direction of rotation of the backing roll 2 moves past the doctor rod 3.
  • this area B is cooled. This cooling, that is, the reduction of the temperature level at this point with respect to the temperature level in front of the doctor bar 3, causes no disturbing particles in the coating or in this area can arise.
  • the cooling of the region B takes place, for example, in that a cooling medium, such as a cold mist, is conducted into this region via suitable feed means.
  • a cooling medium such as a cold mist
  • This cooling of the doctor bar 3 or of the doctor bed 4 can be effected, for example, by the fact that, directed to the area B, a longitudinally aligned opening (puncture) is introduced, through which a cooling medium (eg liquid or gaseous) is guided.
  • a cooling medium eg liquid or gaseous

Landscapes

  • Coating Apparatus (AREA)

Abstract

L'invention concerne un système doseur à racle pour un dispositif d'enduction de bandes de matière (1), en particulier de bandes de papier ou de carton, qui sont en appui contre un contre-rouleau (2) animé en rotation, ledit système comprenant une barre de racle (3) en guise d'élément doseur, qui est montée dans une rainure d'un porte-racle (4) qui est fixé sur le bâti (9) du système. L'invention est caractérisée en ce que la zone (B) située derrière la barre de racle (3) vue dans le sens de rotation de la bande de matière (1) est réalisée de sorte que sa température peut être abaissée au moyen d'un fluide de refroidissement.
PCT/DE2017/100172 2016-03-04 2017-03-03 Lame de couchage refroidie d'un dispositif à racle WO2017148477A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016002556.5 2016-03-04
DE102016002556 2016-03-04

Publications (1)

Publication Number Publication Date
WO2017148477A1 true WO2017148477A1 (fr) 2017-09-08

Family

ID=58454831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2017/100172 WO2017148477A1 (fr) 2016-03-04 2017-03-03 Lame de couchage refroidie d'un dispositif à racle

Country Status (1)

Country Link
WO (1) WO2017148477A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017116621A1 (de) * 2017-07-24 2019-01-24 Horst Sprenger Gmbh Spezialwerkzeuge Gekühlte Streichklinge für eine Vorrichtung zum Beschichten von Materialbahnen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258650A (en) * 1979-09-19 1981-03-31 Mccrocklin Teddy A Rod holder for coating doctor system
US5264247A (en) * 1990-09-14 1993-11-23 Valmet Paper Machinery Inc. Process for the manufacture of a coating bar for a bar coater
US5383968A (en) * 1991-11-06 1995-01-24 Valmet Paper Machinery Inc. Method and device for keeping a coating rod and a rod cradle in a bar coater clean and for preventing leakage of lubrication and/or cooling water
DE19541574A1 (de) * 1995-11-08 1997-05-15 Jagenberg Papiertech Gmbh Vorrichtung zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen
DE20319977U1 (de) * 2003-12-23 2005-05-04 Gh-Beschichtungstechnik Gmbh Rakelwelle
US20110017131A1 (en) * 2002-12-06 2011-01-27 Damrau Wayne A Doctor apparatus
DE102011112956A1 (de) 2011-09-13 2013-03-14 Horst Sprenger Gmbh Rakel-Dosiersystem

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258650A (en) * 1979-09-19 1981-03-31 Mccrocklin Teddy A Rod holder for coating doctor system
US5264247A (en) * 1990-09-14 1993-11-23 Valmet Paper Machinery Inc. Process for the manufacture of a coating bar for a bar coater
US5383968A (en) * 1991-11-06 1995-01-24 Valmet Paper Machinery Inc. Method and device for keeping a coating rod and a rod cradle in a bar coater clean and for preventing leakage of lubrication and/or cooling water
DE19541574A1 (de) * 1995-11-08 1997-05-15 Jagenberg Papiertech Gmbh Vorrichtung zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen
US20110017131A1 (en) * 2002-12-06 2011-01-27 Damrau Wayne A Doctor apparatus
DE20319977U1 (de) * 2003-12-23 2005-05-04 Gh-Beschichtungstechnik Gmbh Rakelwelle
DE102011112956A1 (de) 2011-09-13 2013-03-14 Horst Sprenger Gmbh Rakel-Dosiersystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017116621A1 (de) * 2017-07-24 2019-01-24 Horst Sprenger Gmbh Spezialwerkzeuge Gekühlte Streichklinge für eine Vorrichtung zum Beschichten von Materialbahnen

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