EP1817115B1 - Guidage lateral pour application au rideau - Google Patents

Guidage lateral pour application au rideau Download PDF

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Publication number
EP1817115B1
EP1817115B1 EP05811277A EP05811277A EP1817115B1 EP 1817115 B1 EP1817115 B1 EP 1817115B1 EP 05811277 A EP05811277 A EP 05811277A EP 05811277 A EP05811277 A EP 05811277A EP 1817115 B1 EP1817115 B1 EP 1817115B1
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EP
European Patent Office
Prior art keywords
lateral guide
curtain
coating
liquid
section
Prior art date
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EP05811277A
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German (de)
English (en)
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EP1817115A1 (fr
Inventor
Frank Reinhard
Harald Horbach
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BASF SE
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BASF SE
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    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor

Definitions

  • the present invention relates to a device and method for curtain coating for applying thin films to moving substrates.
  • the invention relates to a device for guiding the side of coating curtains and a method for using this device.
  • Such devices are used for example in the coating of paper, adhesive tapes or even in the coating of photographic films.
  • a corresponding coating liquid for example a solvent or else a dispersion or solution
  • a corresponding coating head By means of a correspondingly shaped casting gap or a corresponding pouring lip, the coating liquid is shaped into a free-falling curtain, which impinges on a substrate moving transversely to the direction of fall of the curtain.
  • Typical speeds for the movement of the substrate are for example in the paper coating in the range of some 100 m / min.
  • One of the problems encountered is, in particular, to stabilize the edges of the curtain.
  • the curtain tends to contract, thereby reducing the coated area on the substrate and forming thickenings (beads) as it strikes the substrate at the edge of the resulting surface film.
  • a curtain holder is known in which the edges of the curtain are stabilized by means of threads or wires. Through a construction of different pulleys moves at each edge of the curtain, a corresponding thread or wire in the direction of the curtain to which the curtain adheres.
  • the in the GB 2 021 001 A the device described is technically very complex. Furthermore, the stability of the described curtain holder suffers from the fact that not at every point the speed of the thread or wire is optimally adapted to the falling speed of the curtain, as a result of which instabilities can occur.
  • Another way of stabilizing the edges of the curtains is to provide rigid curtain holders which are wetted with an auxiliary liquid.
  • the auxiliary liquid can partially move with the free-falling curtain and thus compensates for the difference in speed between the rigid curtain holder and the free-falling curtain.
  • Such systems are for example in the EP 0 737 521 A2 described.
  • the supply of an auxiliary liquid to the surface of a curtain holder takes place through a porous plate whose thickness may have a gradient, so that the auxiliary liquid moves in the optimum case at the same speed in the direction of fall as the edges of the curtain.
  • auxiliary liquid at the lower end of the curtain holder is often not completely sucked off, which can lead to inhomogeneities in the film thickness (bead formation) of the coated substrates in the edge region.
  • WO 02/081103 A1 describes a device having a slot nozzle from which coating material emerges in a free-falling curtain and which has a downwardly extending guide element for the edge of the curtain on each side immediately adjacent to the outlet gap. Elements for sucking off coating material are arranged in the edge region of the web. At the lower end of each guide element, a suction element is attached, whose inner side facing the curtain is aligned with the inside of the guide element. Through the suction leads connected to a suction suction channel, which opens into a running at the bottom of the inside perpendicular to the curtain plane Absaugspitz.
  • WO 03/049870 A1 describes a device for curtain coating, in particular for a high-speed coating of a continuous paper web.
  • the apparatus comprises a hopper means which provides one or more liquid coating materials in the form of a free-falling curtain.
  • the curtain strikes the substrate along a wetting line.
  • edge guide elements are provided on both sides, which provide an auxiliary liquid.
  • Each of the edge guide members has at least a contact portion of its surface facing the curtain, the contact portion having a plurality of grooves and ribs extending along the length of the edge guide member.
  • the EP 0 740 197 A1 a device is described in which by means of a horizontal, perpendicular to the curtain dosing a film of an auxiliary liquid is applied to the surface of a side guide, which connects to the edge of the curtain and moves with this in the direction of fall.
  • the liquid film may be limited in its width.
  • the device described has the disadvantage that especially shortly below the pouring lip for feeding the auxiliary liquid to the side guide device turbulence in the auxiliary liquid film occur, which are in particular due to the fact that the auxiliary liquid is fed perpendicular to the direction of fall of the curtain on the surface of the side guides to there finally to be redirected by 90 °.
  • the object of the present invention is therefore to improve the existing possibilities for stabilizing the curtain in the curtain coating and thus to increase the coating quality and the reliability of the curtain coating.
  • the curtain producer may be a commercially available nozzle of a commercial curtain coater, for example a simple nozzle or a cascade nozzle for producing a liquid curtain consisting of several individual layers.
  • curtain producers with simple casting devices with one or more pouring lips are also conceivable. It is assumed that the generated liquid curtain essentially falls freely in the vertical direction.
  • the side guide device has a side guide body with a guide surface.
  • This side guide body can in particular directly or indirectly via an intermediate piece (for example, a separating plate) connected to the curtain generator, for example, be screwed.
  • the separating plate or intermediate piece forms part of the entire lateral guiding device.
  • the side guide body and the separating plate may for example be wholly or partly made of aluminum, stainless steel, treated steel (eg chromium-plated or nickel-plated steel, etc.) or plastic or consist of different materials.
  • a side guide groove is embedded in the guide surface of the side guide body.
  • This side guide groove extends substantially vertically when using the side guide device to stabilize a free-falling coating curtain.
  • the cornering groove has at least two sections, a calming section and a guide section arranged below the calming section.
  • an auxiliary liquid inlet for introducing an auxiliary liquid is introduced into the side guide groove in the side guide body, wherein the auxiliary liquid inlet is arranged above the calming section.
  • a liquid drain is further provided in the side guide body.
  • the stabilization of the coating curtain takes place in that auxiliary liquid flows in the vertical direction through the side guide groove, wherein the auxiliary liquid is in contact with the liquid, free-falling coating curtain.
  • auxiliary liquid flows in the vertical direction through the side guide groove, wherein the auxiliary liquid is in contact with the liquid, free-falling coating curtain.
  • An essential feature of the present invention is that the auxiliary liquid in the flow region of the side guide groove has little or no horizontal components.
  • the movement of the auxiliary liquid thus takes place virtually completely parallel to the movement of the coating curtain, which additionally reduces the likelihood of a tearing off of the coating curtain from the auxiliary liquid.
  • An essential component of the invention is therefore the said calming section, which serves to transfer the flow of the auxiliary liquid after it has been introduced into the flow region via the auxiliary liquid inlet from a turbulent flow into a laminar flow in the vertical direction.
  • the coating curtain is out of contact with the auxiliary liquid to prevent transfer of transverse components of the auxiliary liquid velocity that may still be within the settling section to the coating curtain, thereby further reducing the likelihood of coating curtain tearing off
  • the auxiliary liquid inlet may have a bore extending essentially perpendicular to the guide surface, via which auxiliary liquid is introduced into the lateral guide groove in the horizontal direction, in order then to be deflected there by 90 °.
  • all the velocity components of the auxiliary liquid are then gradually degraded perpendicular to the guide surface and the movement of the auxiliary liquid is converted into a laminar flow in the vertical direction.
  • the side guide device additionally has a separating device which completely or partially separates the auxiliary liquid in the settling section from the coating curtain or the coating liquid.
  • This separating device may for example be a separating plate, which covers the cornering groove in the area of the calming section and the side guide device of the Curtain generator separates.
  • the calming section should have a length of more than 3 mm, preferably a length of 5 to 7 mm.
  • a forced mixing section can be provided in the side guide groove, in particular between the calming section and the guide track.
  • the forced mixing section should be arranged between the calming section and the guide section.
  • the auxiliary liquid is in contact with the coating liquid when passing through the forced mixing section before the coating liquid has left the curtain generator.
  • the side guide device has a device for fastening the side guide device to the curtain generator, for example, a simple device for screwing, in particular corresponding holes or tapped holes. It is then possible to use a commercially available curtain generator with a nozzle, wherein the side guide device is attached to the curtain generator so that the auxiliary liquid is already in contact with the coating liquid before it has reached the nozzle tip of the curtain generator.
  • the side guide device may form a wall of the curtain generator.
  • the forced mixing between auxiliary liquid and coating liquid takes place over a length of 0.5 to 3 mm.
  • the forced mixing can be carried out in such a way that the side guide device is fastened to a wall of the curtain generator via a separating device, in particular a separating plate.
  • the separating plate separates the auxiliary liquid in the settling section from the coating liquid in the area of the settling section.
  • the separating plate can then have a mixing slot in the region of the forced mixing section, within which a forced mixing between the auxiliary liquid in the forced mixing section and the coating liquid in the curtain generator can take place.
  • the side guide device can be designed such that the at least one liquid drain has a suction gap, which opens onto the guide surface.
  • this suction gap can be connected to a vacuum device for sucking off the auxiliary liquid.
  • This suction gap optimally opens at an angle other than 90 ° to the guide surface. In this case, angles in the range of 30 to 88 ° of the suction gap to the guide surface, preferably even in a range of 40 to 75 ° and very particularly preferably in a range of 50 ° to 70 °, have proved to be particularly advantageous.
  • the suction gap optimally has a width between 0.5 and 3 mm, preferably in the range between 1 and 2 mm and most preferably a width of 1.3 to 1.6 mm, in particular of 1.5 mm. With these angles and dimensions of Absaugspalts maximum suction results.
  • the lateral guide groove can in principle have any desired cross section, that is to say in particular a rectangular, oval, round or V-shaped cross section.
  • the lateral guide groove should in particular have a width of 0.5 to 1.5 mm, preferably in the range of 1 mm. This ensures that the consumption of auxiliary liquid, which in particular can be water, is minimized.
  • the width of the side guide groove is just large enough to detect the thickness of the coating curtain, as well as minor variations (such as air movement) of the coating curtain.
  • the auxiliary liquid since the auxiliary liquid is usually contaminated after passing through the guide path with coating liquid, the auxiliary liquid must be cleaned, since often introduction of coating liquid or contaminated with coating liquid auxiliary fluid into a sewage system or simple waste system for environmental reasons is not possible.
  • the proposed arrangement has the advantage over the arrangements described in the prior art that the need for auxiliary fluid is minimized.
  • the lateral guide groove should have at least one point a depth of 0.5 to 1.5 mm, preferably in the range of 1 mm.
  • this depth ensures that an adjustment of the vertical velocity of the auxiliary liquid in the side guide groove from 0 (directly on the wall of the groove) to the free fall velocity, which also largely corresponds to the speed of the coating curtain, can be done.
  • the depth of the 39 outsnut can vary over the entire course of the So outsnut away.
  • the depth of the side guide groove in the vertical flow region has a gradient region in which the depth of the side guide groove, continuously increases towards the bottom.
  • the surface of the side guide device has been at least partially, in particular in the flow area, reduced by suitable mechanical measures to a roughness of not more than 100 microns, preferably even between 25 and 75 microns.
  • suitable mechanical measures for example, polish processes or corresponding production processes that produce a low surface roughness, such as, for example, erosion, are suitable measures. This ensures that the turbulence caused in the surface of the vortex and thus velocity components perpendicular to the flow direction (ie in the horizontal direction) are minimized.
  • the coating curtain is advantageous to bring the coating curtain as far as possible to the substrate to be coated.
  • continuous substrates such as paper webs or plastic webs. These are typically fed to the coating curtain via roller or shaft systems.
  • the surface to be coated is curved below the curtain generator.
  • the side guide device has a lower edge or surface, which runs completely or partially angled relative to the horizontal and / or at least partially has a concave profile.
  • a concave course is meant, for example, a round milling, wherein the radius of this milled cut is ideally adapted to the radius of curvature of the substrate to be coated at the point of impact of the coating curtain.
  • a curtain coater is proposed, in which a side guide device is integrated according to one of the embodiments described above. Furthermore, a method for coating substrates by means of a curtain coating method is proposed in which at least one coating curtain is stabilized by at least one lateral guiding device according to the invention.
  • FIGS. 1 to 4 is a possible embodiment of a side guide body 110 according to the invention a side guide device shown in different views.
  • the side guide body 110 is in this embodiment adapted to a coating head (curtain generator) of the TSE trolls Swiss Engineering AG.
  • the side guide body 110 has a substantially rectangular mounting portion 112, by means of which the side guide body 110 can be attached to the coating head (see below, FIG. 6 ).
  • bores 114 are embedded in the attachment region 112, by way of which the side guide body 110 can be fastened to the coating head by means of screws (see below).
  • FIG. 6 The screw heads are sunk in the mounting portion 112.
  • the fastening region 112 has a ventilation bore 116, which corresponds to a ventilation region of the coating head when the side guide device is attached to the coating head and allows pressure equalization to take place in the coating head.
  • a substantially trapezoidal transition region 118 adjoins the attachment region 112 downwards, ie in the direction of fall of the coating curtain, followed by an elongated guide element 120.
  • a vertically running side guide groove 122 is introduced into the transition region 118 and the guide element 120.
  • the side guide groove 122 has a rectangular cross section with a depth d (see FIG FIG. 2 and FIG. 4 ) of 1 mm and a width b (see FIG. 1 and FIG. 3 ) of likewise 1 mm.
  • the depth d over the entire region of the 20.00 is constant.
  • the depth d can also increase downwards, ie in the direction of fall of the coating curtain.
  • FIG. 2B An example of such a configuration is in FIG. 2B shown.
  • the depth d of the side guide groove 122 increases linearly toward the bottom.
  • the side guide groove 122 Immediately below the feed bore 124, the side guide groove 122 has a depth d 1 of 1 mm, immediately above the liquid drain 142 a depth d 2 of 2 mm. In this way, a stronger penetration of the coating curtain is ensured in the side guide groove 122 in the direction of fall (ie, downwards in Figure 2B), whereby a more intense and reliable stabilization downwards takes place.
  • the auxiliary liquid used in this embodiment is preferably water.
  • organic solvents or other auxiliary liquids are also possible to use, for example, organic solvents or other auxiliary liquids.
  • the material for the side guide body 110 stainless steel is used in this example. Alternatively, other materials, such as plastics, or aluminum, can be used.
  • a feed bore 124 is provided, which extends perpendicular to the guide surface 126 through the transition region 118.
  • the supply bore 124 has a connection region 127 with a thread, via which, for example, a supply hose (not shown) can be connected to the supply bore 124.
  • the feed bore 124 has a flow region 128 which ends immediately above the side guide groove 122 in the guide surface 126.
  • Auxiliary fluid for example, water, is deflected at the end of the flow area 128 by 90 ° to then move in the vertical direction through the 9. Adjustsnut 122.
  • the auxiliary liquid As described above, the division of the side guide groove 122 into the three areas of stabilization of the curtain.
  • the auxiliary liquid after being introduced through the feed bore 124 and corresponding deflection by 90 °, is first calmed in its flow. At this time, all the velocity components of the auxiliary liquid perpendicular to the guide surface 126 are eliminated, and the flow is converted into a laminar flow in the vertical direction by the side guide groove 122.
  • the auxiliary liquid Within the forced mixing section 138, the auxiliary liquid first comes in contact with the coating liquid and mixes with it. However, this takes place in an area within which the coating liquid has not yet left the coating head.
  • Within the forced mixing section 138 also possible turbulences, which are caused by the mixing of the two liquids, are compensated.
  • the lower end of the guide member 120 is as a section A and B in the FIGS. 3 (A) and 4 (B) shown, wherein the FIG. 4 the embodiment of the side guide body 110 with a constant depth d of the So Adjustsnut 122 according to FIG. 2 , not the alternative embodiment according to FIG. 2b represents.
  • the lower surface 144 of the side guide device 110 is not parallel to the horizontal, but has both in the plane according to FIG. 1 (Front view, inclination angle ⁇ ) and in the plane of FIG. 2 (Side view, angle of inclination ⁇ ) in each case at a 90 ° different angle to the vertical. These angles serve a different purpose.
  • the difference of the inclination angle ⁇ to 90 ° in the drawing plane according to FIG. 1 serves to compensate for an inclination of the substrate to be coated relative to the horizontal.
  • This tendency of the substrate to be coated occurs, for example, when the curtain coating is to take place on a roll guided substrate in a different position from the 12 o'clock position (see below).
  • the incline ensures that the side guide device 110 with its lower surface 144 can be brought as close as possible to the substrate surface.
  • the inclination angle ⁇ has an amount of 85 °, so that the surface 144 in the drawing plane according to FIG. 1 inclined at 5 ° to the horizontal.
  • inclined surface 144 may also be a round milling of the surface 144, for example, to bring the surface 144 as close as possible to a curved substrate surface (for example, a substrate on a roll).
  • the slope ⁇ different from 90 ° in the drawing plane according to FIG. 2 serves the purpose of preventing capillary action when the lower surface 144 of the side guide body 110 is brought close to a substrate surface. If the surface 144 were planar to the substrate, approaching a substrate surface could form a narrow cavity with parallel sidewalls, which attract coating liquid of the curtain by capillary action, thereby blurring the coating at the edges.
  • an angle ⁇ of 80 ° is used, so that the surface 144 in the plane according to FIG. 2 inclined at 10 ° to the horizontal.
  • the liquid drain 142 has a gap 146 (see FIGS. 3 and 4 ) which in an angle different from 90 ° ⁇ (see FIG. 4 ) opens onto the guide surface 126.
  • the opening of the gap 146 on the guide surface 126 is parallel to the lower edge of the guide surface, so that the opening relative to the vertical has the angle ⁇ (see FIG. 1 ).
  • the gap 146 is arranged so that the side guide groove 122 terminates in the gap 146.
  • the drain 142 has a suction hole 148, wherein the suction gap 146 terminates in the suction hole 148. Also, the suction hole 148 is inclined by the angle ⁇ relative to the vertical, so that the axis of the suction hole is parallel to the surface 144. In the suction hole 148 is in this embodiment, a smooth, continuous bore. This offers over a blind hole the advantage of a simplified and cheaper production.
  • the suction hole 148 may be connected to a vacuum system.
  • 148 threaded holes 150 are provided in the guide member 120 near the suction hole (two on each side), which can be used to attach a vacuum device.
  • the liquid drain 142 via a pump system with a corresponding liquid waste container connected, in which the contaminated with coating liquid auxiliary fluid can be pumped. This can for example be done by the suction hole 148 in FIG. 3 Connected to the left with a vacuum system, wherein the vacuum system (eg, a hose or nozzle) is attached to the left threaded hole 150.
  • the vacuum system eg, a hose or nozzle
  • the right side of the suction hole 148 can then be sealed, for example vacuum-tight with a plate which is attached via the right threaded bore 150 on the guide member 120.
  • auxiliary liquid can be sucked out of the side guide groove 122 by means of the vacuum system via the suction gap 146 and the suction bore 148.
  • the parallel Absaugspalt 146 extends at an angle ⁇ to the vertical.
  • This angle ⁇ causes the mouth of Absaugspaltes 146 on the guide surface 126 as close to the end surface 144, ie at the lower end of the guide surface 126, opens. This ensures that the coating curtain is guided as far as possible directly above the substrate surface of the auxiliary liquid.
  • the angle ⁇ ensures that the suction hole 148 comes to rest on the guide surface 126 above the point of discharge of the suction gap 146, whereby this bore 148 can be made large enough to pump off sufficient auxiliary liquid.
  • the angle ⁇ is 50 °.
  • FIG. 5 is shown in this example as a separating plate 510 designed separator, which forms an integral part of the side guide device in the mounted on the coating head state of the side guide device 110.
  • the separating plate 510 is made of stainless steel, has a thickness of 0.1 mm. Alternatively, other thicknesses could be used as well as other materials for the baffle 510, such as plastic.
  • the separating plate 510 has a rectangular fastening region 512 and a trapezoidal transition region 514.
  • the mounting portion 512 is provided with mounting holes 516, which the bores 114 in FIG. 1 largely correspond. Also, a vent hole 518 is provided, which the vent hole 116 in FIG. 1 equivalent.
  • the lower edge 132 of the transition region 514 has the mixing slot 134 already described above in the form of a downwardly open U. In the area of this mixing slot, the forced mixing between the auxiliary liquid and the coating liquid takes place in the assembled state.
  • FIG. 6 1 is an assembly drawing of the side guide device 608, in this case consisting of the side guide body 110 and the separating plate 510, with a coating head 610.
  • the coating head 610 essentially has a gap 612, through which coating liquid is guided vertically downwards to the nozzle tip 614. Furthermore, the coating head 610 has a distribution channel 616, which corresponds to the venting bore 116 and the venting bore 518.
  • the side guide device 608, ie the side guide element 110 and the separating plate 510, is attached as a side wall to the coating head 610, so that the side guide device 608 acts as a wall element of the coating head 610 and closes off the gap 612.
  • the coating head 610 creates a curtain 618 of coating liquid which falls vertically downwardly from the nozzle tip 614.
  • This curtain is to be stabilized at its edges by the side guide devices 608, wherein in FIG. 6 only one of the two side guide devices 608 is shown.
  • a coated substrate which is passed over a coating roller 620.
  • the coating curtain 618 does not impinge on the shaft 620 (or the substrate guided thereon) at the zenith (12 o'clock position, 622), but in an impact position 624 offset by 25 mm in the horizontal direction (in this embodiment).
  • this fact is taken into account by the fact that the lower surface 144 of the side guide body 110 is inclined by the angle ⁇ different from 90 °, ie it does not run horizontally. As a result, the lower surface 144 of the side guide device 110 can be brought as close as possible to the surface to be coated so that the stabilization of the coating curtain 618 can take place directly above this surface.
  • the side guide device 608 is not the one in FIG. 1 to FIG. 4 shown side guide body 110 is used, but a mirror-image side guide device with the angle ⁇ + 90 °. The in the FIGS. 1 to 4 shown side guide device 608 would in FIG. 6 used to stabilize the opposite, not shown, end of the coating curtain 618.
  • the described lateral guide device 608 according to the invention has proven to be much superior in practice than conventional lateral guide devices.
  • a very good fixation of the coating curtain 618 is achieved.
  • coating speeds of more than one thousand m / min could be achieved.
  • the auxiliary liquid film is fixed by the narrow side guide groove 122 and does not migrate on the guide surface 126, greatly increasing the process stability.
  • the amount of Fixing liquid (water) could be reduced from four to six 1 / h by using the side guide device 608 from twelve to twenty 1 / h, so that the environmental impact was increased by reducing the polluted wastewater.
  • the cleaning effort of the side guide device 608 according to the invention was greatly reduced after use.
  • the side guide device 608 could also be used for very low coating or substrate speeds, in particular even for speeds below 300 m / min, which is not possible with conventional side guide devices. Furthermore, when using the liquid drain 142, it will be seen that with the "parked" curtain coater (ie in an operating condition where a coating curtain 618 is being formed, but no substrate is being coated), no auxiliary liquid will enter the recoil of the curtain coater, which is also important Advantage represents.
  • FIG. 7 shows a possible embodiment of a method by means of which a substrate can be coated with a coating curtain by using a side guide device according to the invention.
  • the illustrated method steps need not necessarily be performed in the order shown.
  • the method may additional, in FIG. 7 have not shown method steps. Several process steps can also be carried out in parallel.
  • At least one coating curtain 618 is correspondingly provided by means of a curtain producer 610 FIG. 6 generated.
  • an auxiliary liquid is passed through the flow areas 140 of two side guide grooves 122 according to a side guide device 608 according to the invention.
  • the coating curtain 618 is brought into contact with the auxiliary liquid and thereby stabilized.

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Claims (19)

  1. Dispositif de guidage latéral (608) pour la stabilisation des bords d'un rideau de revêtement liquide (618) produit au moyen d'un formateur de rideau (610), dans lequel le dispositif de guidage latéral (608) comprend :
    a) un corps de guidage latéral (110) avec une surface de guidage (126);
    b) une rainure de guidage latéral (122) insérée dans la surface de guidage (126) du corps de guidage latéral (110),
    - dans lequel la rainure de guidage latéral (122) présente au moins une zone de calmage (136) et une zone de guidage (140) disposée en dessous de la zone de calmage (136);
    c) au moins une arrivée de liquide auxiliaire (124) insérée dans le corps de guidage latéral (110) pour l'introduction d'un liquide auxiliaire dans la rainure de guidage latéral (122) au-dessus de la zone de calmage (136) ; et
    d) au moins une évacuation de liquide (142) pour prélever du liquide auxiliaire après sa traversée de la zone de guidage (140),
    caractérisé en ce que le dispositif de guidage latéral (608) présente en plus un dispositif de séparation (510) pour la séparation spatiale partielle ou totale du liquide auxiliaire du liquide de revêtement dans la zone de calmage (136).
  2. Dispositif de guidage latéral (608) selon la revendication précédente, dans lequel la zone de calmage (136) présente une longueur de plus de 3 millimètres, de préférence une longueur de 5-7 mm.
  3. Dispositif de guidage latéral (608) selon l'une quelconque des deux revendications précédentes, dans lequel l'arrivée de liquide auxiliaire (124) présente un alésage (128) s'étendant essentiellement perpendiculairement à la surface de guidage (126).
  4. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes avec en plus une zone de mélange forcé (138) ainsi qu'un dispositif (114, 516) pour la fixation du dispositif de guidage latéral (608) au formateur de rideau (610),
    - dans lequel la zone de mélange forcé (138) est disposée entre la zone de calmage (136) et la zone de guidage (140); et
    - dans lequel le liquide auxiliaire est en contact avec le liquide de revêtement lors de la traversée de la zone de mélange forcé (138), avant que le liquide de revêtement ait quitté le formateur de rideau (610).
  5. Dispositif de guidage latéral (608) selon la revendication précédente, dans lequel la zone de mélange forcé (138) présente une longueur de 0,5 à 3 mm.
  6. Dispositif de guidage latéral (608) selon l'une quelconque des deux revendications précédentes, dans lequel le dispositif de guidage latéral (608) présente un dispositif de séparation (510) et dans lequel le dispositif de séparation (510) présente une fente de mélange (134) dans la région de la zone de mélange forcé (138).
  7. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, dans lequel l'évacuation de liquide (142) présente une fente d'aspiration (146) débouchant dans la surface de guidage (126).
  8. Dispositif de guidage latéral (608) selon la revendication précédente, caractérisé en ce que l'évacuation de liquide (142) est raccordée à un dispositif à dépression pour aspirer le liquide auxiliaire.
  9. Dispositif de guidage latéral (608) selon l'une quelconque des deux revendications précédentes,
    caractérisé en ce que la fente d'aspiration (146) débouche dans la surface de guidage (126) sous un angle γ différent de 90°.
  10. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, caractérisé en ce que la fente d'aspiration (146) débouche dans la surface de guidage (126) sous un angle γ de 30° - 88°, de préférence sous un angle γ de 40° - 75°.
  11. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, dans lequel la rainure de guidage latéral (122) présente une section transversale essentiellement rectangulaire ou ovale ou ronde ou en forme de V.
  12. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, dans lequel la rainure de guidage latéral (122) présente une largeur b de 0,5 - 1,5 mm.
  13. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, dans lequel la rainure de guidage latéral (122) présente une profondeur d de 0,5 - 1,5 mm en au moins un endroit.
  14. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, dans lequel la rainure de guidage latéral (122) présente une profondeur différente d en au moins deux endroits situés l'un au-dessus de l'autre dans la zone de guidage (140), dans lequel la profondeur d est plus grande à celui des deux endroits situé plus bas dans la direction de chute du rideau de revêtement (618) qu'à l'endroit situé le plus haut.
  15. Dispositif de guidage latéral (608) selon la revendication précédente, dans lequel la zone de guidage (140) présente une région de gradient, dans laquelle la profondeur de la rainure de guidage latéral (122) augmente de façon continue dans la direction de chute du rideau de revêtement (618).
  16. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de guidage latéral (608) comporte un côté inférieur ou une face inférieure (144) par rapport à la direction de chute du rideau de revêtement (618), dans lequel ce côté inférieur ou cette face inférieure (144) par rapport à la direction de chute du rideau de revêtement (618) est en partie ou en totalité incliné(e) par rapport à l'horizontale et/ou présente au moins partiellement un tracé concave.
  17. Dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface du dispositif de guidage latéral (608) présente une rugosité Rz qui n'est pas supérieure à 100 micromètres, et est de préférence comprise entre 25 et 75 micromètres.
  18. Dispositif de revêtement au rideau avec un dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes.
  19. Procédé pour le revêtement de substrats par un procédé de revêtement au rideau, comportant les étapes suivantes:
    a) on produit au moins un rideau de revêtement (618) au moyen d'un formateur de rideau (610);
    b) on conduit un liquide auxiliaire à travers une rainure de guidage latéral (122) d'au moins un dispositif de guidage latéral (608), dans lequel on utilise le dispositif de guidage latéral (608) selon l'une quelconque des revendications précédentes portant sur un dispositif de guidage latéral (608);
    et
    c) on met le rideau de revêtement (618) en contact avec le liquide auxiliaire et de ce fait on le stabilise.
EP05811277A 2004-11-22 2005-11-21 Guidage lateral pour application au rideau Active EP1817115B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004056270A DE102004056270A1 (de) 2004-11-22 2004-11-22 Seitenführung für die Vorhangbeschichtung
PCT/EP2005/012439 WO2006056385A1 (fr) 2004-11-22 2005-11-21 Guidage lateral pour application au rideau

Publications (2)

Publication Number Publication Date
EP1817115A1 EP1817115A1 (fr) 2007-08-15
EP1817115B1 true EP1817115B1 (fr) 2010-06-09

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Application Number Title Priority Date Filing Date
EP05811277A Active EP1817115B1 (fr) 2004-11-22 2005-11-21 Guidage lateral pour application au rideau

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EP (1) EP1817115B1 (fr)
AT (1) ATE470511T1 (fr)
DE (2) DE102004056270A1 (fr)
ES (1) ES2346074T3 (fr)
WO (1) WO2006056385A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000778A1 (de) 2007-09-27 2009-04-02 Voith Patent Gmbh Auftragsvorrichtung und Verfahren zum Betreiben einer Auftragsvorrichtung
DE102007000777A1 (de) 2007-09-27 2009-04-02 Voith Patent Gmbh Auftragsvorrichtung
DE102008054892A1 (de) * 2008-12-18 2010-06-24 Voith Patent Gmbh Vorhang-Auftragswerk
DE102010042291A1 (de) * 2010-10-11 2012-04-12 Fmp Technology Gmbh Fluid Measurements & Projects Vorrichtung zum Vorhangbeschichten eines Trägers
EP2952264B1 (fr) 2014-06-05 2019-10-30 Valmet Technologies, Inc. Dispositif de revêtement à rideau
JP7004898B2 (ja) * 2017-08-21 2022-02-10 キョーラク株式会社 積層剥離容器及び積層剥離容器のエアリーク検査方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117668A1 (de) * 2001-04-09 2002-10-10 Bachofen & Meier Ag Buelach Vorrichtung zum Beschichten einer laufenden Materialbahn
US6982003B2 (en) * 2001-12-13 2006-01-03 Dow Global Technologies Inc. Method and apparatus for curtain coating

Also Published As

Publication number Publication date
ES2346074T3 (es) 2010-10-08
DE102004056270A1 (de) 2006-05-24
WO2006056385A1 (fr) 2006-06-01
ATE470511T1 (de) 2010-06-15
EP1817115A1 (fr) 2007-08-15
DE502005009734D1 (de) 2010-07-22

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