EP0528372A1 - Dispositif pour le guidage sans contact d'une bande continue revêtue - Google Patents

Dispositif pour le guidage sans contact d'une bande continue revêtue Download PDF

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Publication number
EP0528372A1
EP0528372A1 EP92113895A EP92113895A EP0528372A1 EP 0528372 A1 EP0528372 A1 EP 0528372A1 EP 92113895 A EP92113895 A EP 92113895A EP 92113895 A EP92113895 A EP 92113895A EP 0528372 A1 EP0528372 A1 EP 0528372A1
Authority
EP
European Patent Office
Prior art keywords
gas
material strip
air
guide
jacket
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
EP92113895A
Other languages
German (de)
English (en)
Other versions
EP0528372B1 (fr
Inventor
Horst Faust
Joachim Stroszynski
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of EP0528372A1 publication Critical patent/EP0528372A1/fr
Application granted granted Critical
Publication of EP0528372B1 publication Critical patent/EP0528372B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

Definitions

  • the invention relates to a method and a device for the contact-free guiding of a coated material strip in a drying zone, with the aid of a heated gas.
  • the dryer air is led from a vestibule via suitable inlet openings and flow deflectors into a calm intermediate space, from where part of the dryer air passes through in close proximity to the liquid jet to avoid stagnation point-like flows in the initial area of the dryer apparatus arranged porous filter element on the web to be dried.
  • the mode of operation of such drying is based on the fact that between the porous protective shield and the liquid film to be dried a calm, but highly enriched solvent air flow forms, which is constantly renewed by exchange with the residual air transversely flowing over the porous medium and thus, due to the relatively short overall length, a predrying of the liquid film with reduced tendency to mottling is achieved.
  • This type of drying is predominantly characterized by diffusion of the solvent vapor / air mixture through the porous protective shield, which means that if there is almost no convective removal within the space between the belt and the protective shield, the liquid film can only dry out completely if the dryer lengths are very large or by adding subordinate auxiliary dryers.
  • drying goods are, for example, metal or plastic belts on which liquid layers are applied, which usually consist of evaporable solution components that are removed from the liquid film during the drying process and non-evaporable components that remain on the carrier material after drying.
  • evaporable solution components that are removed from the liquid film during the drying process
  • non-evaporable components that remain on the carrier material after drying.
  • Such become drying webs first through a drying zone and then through the actual drying zone.
  • the coating gives the surfaces of the carrier materials special properties which are only present in the form after the drying process, as are desired for later use.
  • An example of this is the coating of metal strips, in particular aluminum strips, with light-sensitive layers, which are assembled into printing plates.
  • the coating of metal strips or plastic films with a solvent-containing wet film, hereinafter referred to as the liquid film, and its subsequent drying represent a process that requires special systems to ensure the desired product quality of the layers.
  • the process steps of the drying and the final film drying are essential as the final process measures of the coating.
  • the dryer floor When designing the dryer floor with a soft material, e.g. a textile fabric, felt or fleece, such longitudinal scratches are avoided, but these carpets are cut at different widths of the material strips. Particles of the lining material then form, which occupy and thus contaminate the layer to be dried, as well as grooves in the lining material which impair uniform contact with the guide surface.
  • a soft material e.g. a textile fabric, felt or fleece
  • the dryer floor is designed with a material that has a significantly lower coefficient of friction than the material band and that is temperature-resistant, e.g. Polytetrafluoroethylene, the mechanical resistance of this material to the edges of the material strip is not given in the long run.
  • a material that has a significantly lower coefficient of friction than the material band and that is temperature-resistant e.g. Polytetrafluoroethylene
  • the object of the invention is to further develop a method and a device so that a coated material band can be guided in a non-contact drying zone in such a way that the uniform drying of the liquid layer on the material band is not impaired and there are no signs of wear and tear on the guide devices.
  • This object is achieved in such a way that the material band is carried by a gas film with a thickness of less than or equal to 1 mm, which flows perpendicularly to the longitudinal and running direction of the material band and that the gas flow is interrupted several times below and in the longitudinal direction of the material band is.
  • the gas stream flows both in the direction of travel and opposite to the direction of travel of the material strip.
  • the material band is guided over guide elements, and depending on the permeability of the guide elements, the gas pressure rises to 1 bar or more before the gas exits the guide elements.
  • Air is expediently used as the gas which has a higher temperature than its surroundings in the drying zone.
  • a so-called gas or air lubrication between the material band and the guide elements is achieved, which takes place at very small intervals.
  • the distance between the material band and the guide elements is considerably less than 1 mm, but can also be up to 1 mm.
  • the gas or air pressure to be specified is substantially lower than 1 bar.
  • the relationship between the gas or air pressure to be specified for the lubrication and the gas or air permeability of the material for the guide elements is particularly important for achieving a uniform and uninterrupted gas or air film between the Material tape and the guide elements transverse to the direction of the material tape.
  • the exit energy of the gas or air from the guide elements must be quickly converted into heat and pressure by the formation of micro-vortices, which increase the effectiveness of the gas or air film, as a result of which the flow of material around the band edges has a deleterious effect on the blow-sensitive Liquid layer is avoided.
  • a device for the contact-free guiding of a coated material band through a dryer according to the invention is characterized in that below the material band that passes through the dryer, guide elements are arranged at equal intervals from one another, each of which has a gas-permeable surface that is the underside of the material band is facing.
  • each guide element contains an inlet channel for the gas supply and the guide elements are connected to a common supply line for the gas supply.
  • the supply line is separated from the line for the supply of drying gas or drying air and is operated independently.
  • a common suction line is expediently available for all guide elements.
  • the guide element has a cuboid-shaped, air-permeable body, which is arranged lengthways transversely to the direction of travel of the material band and flows drying gas in the longitudinal direction via a central inlet channel into the interior of the guide element.
  • the material of the body of the guide element is sintered metal or porous glass.
  • the three outer sides of the cuboid body of the guide element, which do not face the material band, are sealed on the outside with a barrier layer made of lacquer or plastic against undesired gas leakage.
  • the advantage is achieved that the gas or air supply under the material strip does not take place over the entire surface, that a uniform sliding effect of the material strip is obtained over the entire web width without the material strip being pushed up at the edges. Interruptions due to slight depressions of the sliding surfaces of the guide elements, which lie transversely to the material band, have proven to be particularly advantageous.
  • FIG. 1 shows a dryer 13 with a so-called air-lubricated guide for a material strip 1.
  • the material strip 1 runs from an inlet into the dryer 13 around a deflection roller 11, which is opposite an application roller 19 for a liquid layer 2. After the liquid layer 2 has been applied to the material strip 1 by the application roller 19, it enters the dryer 13 through a gap and is guided horizontally over guide elements 14. On the back of the dryer 13, the coated material strip 1 emerges from a gap and is guided downwards via a deflection roller 12.
  • the dryer 13 has a housing 15, through the underside of which a supply line 17 and a suction line 18 are passed.
  • Each of the guide elements 14 is connected to the common supply line 17 for the gas or air supply.
  • Each of the guide elements 14 contains an inlet channel 5 for the gas or air supply.
  • the supply line 17 is separated from the line for the supply of drying air and is operated independently.
  • a unit 16 for the air supply which is not shown in detail, consists of an air compressor with an upstream fine filter and a downstream heat exchanger, as well as corresponding pipes and fittings with a corresponding control system.
  • the guide surfaces 9 of the guide elements 14 facing the material strip 1 are gas or air permeable, so that the air flows perpendicularly onto the material strip 1.
  • An air film 7 forms on which the coated material strip 1 slides with the blow-sensitive liquid layer 2 without mechanical contact with the guide surfaces 9 of the guide elements 14.
  • the air pressure or gas pressure before the air or gas emerges from the guide elements can rise to 1 bar or more and depends essentially on the permeability of the guide surfaces 9. The more permeable these guide surfaces 9 are, the smaller the pressure increase within the guide elements 14 before the air or gas escapes.
  • the distance between the underside of the material strip 1 and the guide surfaces 9 is less than 1 mm, but can also be up to 1 mm.
  • the air film 7 flows both in the running direction and opposite to the running direction of the Material tape 1 from, the spaces existing between two guide elements function as outflow areas for the air film. Since the outflowing amounts of air are very small, the guidance and flow behavior within the dryer 13 is not influenced overall, so that there are also no disruptions to the layer cosmetics when the liquid layer 2 dries on the material strip 1.
  • the air flows into the air-permeable bodies of the guide elements 14 and up through the guide surface 9 as guide air 10 against the material strip 1.
  • these outer walls are sealed , as will be described in more detail below.
  • FIGS. 2 to 4 show different embodiments of guide elements 14, 32, 33, which can each be used in the dryer 13 according to FIG. 1.
  • Figure 2 shows a single guide element 14 of the dryer 13 in detail.
  • the guide element 14 consists of a cuboid air-permeable body 3, which is supplied from the inside with finely filtered air via a central inlet channel 5.
  • the air-permeable body 3, which is arranged along its length transversely to the running direction of the material strip 1, consists of sintered metal or porous glass.
  • Three outer sides 24, 25, 26 of the body 3, which are not facing the material strip 1, are externally covered with a barrier layer 4 made of lacquer or plastic against unwanted Sealed air outlet from the body 3.
  • the guide air is guided centrally through the inlet channel 5 longitudinally to the guide surface 9 only against the material strip 1, in order then to flow into and against the strip running direction to form an air film 7 into the adjacent outflow zones.
  • the surface of the guide surface 9 is relatively rough.
  • FIG. 3 shows a further embodiment of a guide element 32, which consists of a distributor pipe 6 with through openings 8 in the region of the guide surface 9 and a jacket 20 which surrounds the distributor pipe 6.
  • the jacket 20 is permeable to air or gas and consists of a fleece or felt coated with polytetrafluoroethylene.
  • the guide air 10 emerges from the jacket 20 mainly below the material strip 1 in the area of the guide surface 9. Further material for the jacket 20 can be fabrics coated with polytetrafluoroethylene, glass or carbon fibers.
  • FIG. 4 shows a further embodiment of the guide element 33, which consists of a distributor pipe 6 with through openings 8 for the air, a jacket 34 made of sintered metal or porous glass, sliding seals 21 and a protective jacket 22.
  • the air-permeable jacket 34 is kept at a distance from the distributor pipe 6 by the sliding seals 21 applied to the distributor pipe 6.
  • the protective jacket 22 encloses the jacket 34, with the exception of a flat polygonal surface 35 which faces the underside of the material strip 1.
  • the sliding seals 21 and 23 can, for example, be glued to the supply pipe 6 or to the inside of the protective jacket 22.
  • the air-permeable jacket 34 is rotatable relative to the supply pipe 6, so that the entire circumferential surface of the air-permeable jacket 34 can be used by rotating the jacket 34 as soon as its flat polygonal surface 35, which faces the material strip 1, is not contaminated by internal or external contamination is more functional.
  • the outside of the jacket 34 consists of flat polygon surfaces 35 which are connected to one another by rounded transition surfaces 36. These transition surfaces 36 facilitate the rotation of the jacket 34 with respect to the fixed protective jacket 22, since they only have small ones with the sliding seal 23 Partial areas and not in contact over the total area.
  • the passage openings 8 of the fixed distributor pipe 6 face the material strip 1, and two sliding seals 21 are located in the immediate vicinity of the passage openings 8, while two further sliding seals 21 are applied to the distributor pipe 6 at diametrically opposite locations.
  • the guide elements 14, 32 or 33 With the help of the guide elements 14, 32 or 33, the material strip 1 is guided in the dryer 13 without mechanically moving parts, such as rollers, and the blow-sensitive liquid layer 2 is dried largely without problems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Advancing Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
EP92113895A 1991-08-21 1992-08-14 Dispositif pour le guidage sans contact d'une bande continue revêtue Expired - Lifetime EP0528372B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127602A DE4127602A1 (de) 1991-08-21 1991-08-21 Verfahren und vorrichtung zum beruehrungsfreien fuehren eines beschichteten materialbandes
DE4127602 1991-08-21

Publications (2)

Publication Number Publication Date
EP0528372A1 true EP0528372A1 (fr) 1993-02-24
EP0528372B1 EP0528372B1 (fr) 1996-01-24

Family

ID=6438722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113895A Expired - Lifetime EP0528372B1 (fr) 1991-08-21 1992-08-14 Dispositif pour le guidage sans contact d'une bande continue revêtue

Country Status (6)

Country Link
US (1) US5293699A (fr)
EP (1) EP0528372B1 (fr)
JP (1) JPH05208764A (fr)
BR (1) BR9203252A (fr)
CA (1) CA2075885A1 (fr)
DE (2) DE4127602A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29508421U1 (de) * 1995-05-20 1995-09-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Stationäre Gleitleiste
WO2009017630A2 (fr) * 2007-07-31 2009-02-05 Eastman Kodak Company Séchage micro-structuré pour imprimantes à jet d'encre
EP3069093A1 (fr) * 2013-11-13 2016-09-21 Sandvik Materials Technology Deutschland GmbH Dispositif et procédé de traitement de matériau plan
DE102017128397A1 (de) * 2017-11-30 2019-06-06 Mitsubishi Hitec Paper Europe Gmbh Verfahren und Vorrichtung zum Herstellen eines beschichteten Substrats sowie beschichtetes Substrat

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415581C2 (de) * 1994-05-04 1995-12-07 Voith Gmbh J M Papier-Streichvorrichtung
FR2807338B1 (fr) * 2000-04-11 2002-11-29 Commissariat Energie Atomique Paroi poreuse pour former une couche gazeuse de sustentation
US7357891B2 (en) 2001-10-12 2008-04-15 Monosol Rx, Llc Process for making an ingestible film
US8765167B2 (en) 2001-10-12 2014-07-01 Monosol Rx, Llc Uniform films for rapid-dissolve dosage form incorporating anti-tacking compositions
US8603514B2 (en) 2002-04-11 2013-12-10 Monosol Rx, Llc Uniform films for rapid dissolve dosage form incorporating taste-masking compositions
US10285910B2 (en) 2001-10-12 2019-05-14 Aquestive Therapeutics, Inc. Sublingual and buccal film compositions
US20190328679A1 (en) 2001-10-12 2019-10-31 Aquestive Therapeutics, Inc. Uniform films for rapid-dissolve dosage form incorporating anti-tacking compositions
US20110033542A1 (en) 2009-08-07 2011-02-10 Monosol Rx, Llc Sublingual and buccal film compositions
US11207805B2 (en) 2001-10-12 2021-12-28 Aquestive Therapeutics, Inc. Process for manufacturing a resulting pharmaceutical film
ES2306904T3 (es) * 2002-10-19 2008-11-16 Officine Meccaniche Giovanni Cerutti S.P.A. Sistema de racleta de una maquina de produccion o procesamiento de bandas.
DE10322519A1 (de) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Bahnführungseinrichtung
DE112004002828B4 (de) * 2004-04-30 2015-10-08 Optimags Dr. Zimmermann Gmbh Vorrichtung zum Beschichten einer Trägerfolie mit einem pharmazeutischen Wirkstoff
JP4901395B2 (ja) * 2006-09-26 2012-03-21 富士フイルム株式会社 塗布膜の乾燥方法
JP2011251803A (ja) * 2010-06-01 2011-12-15 Nihon Gore Kk 長尺シートの方向転換装置
US9149959B2 (en) 2010-10-22 2015-10-06 Monosol Rx, Llc Manufacturing of small film strips
WO2013006349A1 (fr) * 2011-07-01 2013-01-10 Cambrios Technologies Corporation Réduction de l'anisotropie du revêtement de films conducteurs
JP6309200B2 (ja) 2013-03-26 2018-04-11 三菱重工業株式会社 雷電流計測装置及び雷電流計測方法
DE102013223150A1 (de) * 2013-11-13 2015-05-28 Sandvik Materials Technology Deutschland Gmbh Trockner und Verfahren zum Trocknen von flächigen Materialien
US11273131B2 (en) 2016-05-05 2022-03-15 Aquestive Therapeutics, Inc. Pharmaceutical compositions with enhanced permeation
CN109310646A (zh) 2016-05-05 2019-02-05 阿奎斯蒂弗医疗股份有限公司 增强递送的肾上腺素组合物
WO2023021818A1 (fr) * 2021-08-16 2023-02-23 富士フイルム株式会社 Barre de soufflage d'air, dispositif de séchage et dispositif d'impression à jet d'encre
WO2024121940A1 (fr) * 2022-12-06 2024-06-13 株式会社都ローラー工業 Rouleau transporteur perforé, dispositif de fabrication de matériau en feuille et dispositif de traitement de matériau en feuille

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DE970045C (de) * 1949-01-21 1958-08-14 Svenska Flaektfabriken Ab Vorrichtung zum Trocknen von bahnfoermigem Material
GB847548A (en) * 1957-06-11 1960-09-07 Du Pont Method and apparatus for heat transfer
DE1143474B (de) * 1960-02-08 1963-02-14 Artos Maschb Dr Ing Meier Wind Duesengehaeuseanordnung fuer die Behandlung und beruehrungsfreie Fuehrung von bahnfoermigem Gut
CH459070A (de) * 1965-12-22 1968-06-30 Windmoeller & Hoelscher Vorrichtung zum Behandeln von bewegten Materialbahnen, vorzugsweise Papier- oder Kunststoff-Folienbahnen, mit einem gasförmigen Medium
WO1990003099A1 (fr) * 1988-09-01 1990-03-22 Pierre De Mouveaux Procede pour transporter dans une enceinte de sechage un produit en feuille, notamment un substrat de circuit imprime, et installation de sechage pour substrats de circuit imprime
EP0414125A2 (fr) * 1989-08-22 1991-02-27 Hoechst Aktiengesellschaft Dispositif pour le séchage d'une couche liquide appliquée sur un substrat en mouvement

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DE459070C (de) * 1925-09-01 1928-04-26 Saco Lowell Shops Fa Federnd nachgiebig in einem Kugellager gelagerte Spindel
US3061940A (en) * 1958-08-22 1962-11-06 Du Pont Method and apparatus for heat transfer
FR2114934A5 (fr) * 1970-12-04 1972-06-30 Polytype Ag
DE2935866A1 (de) * 1978-09-11 1980-03-20 Valmet Oy Bahntrockner nach dem lufttrageprinzip
FI57142C (fi) * 1978-09-11 1980-06-10 Valmet Oy Munstycke foer behandling av materialbanor
US4365423A (en) * 1981-03-27 1982-12-28 Eastman Kodak Company Method and apparatus for drying coated sheet material
US4768695A (en) * 1987-06-11 1988-09-06 Advance Systems, Inc. Air bar for paper web handling apparatus and having an air distributing chamber and perforated plate therefor
US4901449A (en) * 1988-06-07 1990-02-20 W. R. Grace & Co.-Conn. Tri-flotation air bar
US4833794A (en) * 1988-08-10 1989-05-30 Advance Systems, Inc. Dryer apparatus for floating a running web and having baffle means for spent return air

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE970045C (de) * 1949-01-21 1958-08-14 Svenska Flaektfabriken Ab Vorrichtung zum Trocknen von bahnfoermigem Material
US2691225A (en) * 1952-01-25 1954-10-12 Kamprath Conrad Web treating apparatus
GB847548A (en) * 1957-06-11 1960-09-07 Du Pont Method and apparatus for heat transfer
DE1143474B (de) * 1960-02-08 1963-02-14 Artos Maschb Dr Ing Meier Wind Duesengehaeuseanordnung fuer die Behandlung und beruehrungsfreie Fuehrung von bahnfoermigem Gut
CH459070A (de) * 1965-12-22 1968-06-30 Windmoeller & Hoelscher Vorrichtung zum Behandeln von bewegten Materialbahnen, vorzugsweise Papier- oder Kunststoff-Folienbahnen, mit einem gasförmigen Medium
WO1990003099A1 (fr) * 1988-09-01 1990-03-22 Pierre De Mouveaux Procede pour transporter dans une enceinte de sechage un produit en feuille, notamment un substrat de circuit imprime, et installation de sechage pour substrats de circuit imprime
EP0414125A2 (fr) * 1989-08-22 1991-02-27 Hoechst Aktiengesellschaft Dispositif pour le séchage d'une couche liquide appliquée sur un substrat en mouvement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29508421U1 (de) * 1995-05-20 1995-09-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Stationäre Gleitleiste
WO2009017630A2 (fr) * 2007-07-31 2009-02-05 Eastman Kodak Company Séchage micro-structuré pour imprimantes à jet d'encre
WO2009017630A3 (fr) * 2007-07-31 2009-04-16 Eastman Kodak Co Séchage micro-structuré pour imprimantes à jet d'encre
EP3069093A1 (fr) * 2013-11-13 2016-09-21 Sandvik Materials Technology Deutschland GmbH Dispositif et procédé de traitement de matériau plan
DE102017128397A1 (de) * 2017-11-30 2019-06-06 Mitsubishi Hitec Paper Europe Gmbh Verfahren und Vorrichtung zum Herstellen eines beschichteten Substrats sowie beschichtetes Substrat

Also Published As

Publication number Publication date
JPH05208764A (ja) 1993-08-20
DE59205146D1 (de) 1996-03-07
CA2075885A1 (fr) 1993-02-22
US5293699A (en) 1994-03-15
DE4127602A1 (de) 1993-02-25
BR9203252A (pt) 1992-12-01
EP0528372B1 (fr) 1996-01-24

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