EP0791687B1 - Verfahren und Vorrichtungen zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn - Google Patents

Verfahren und Vorrichtungen zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn Download PDF

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Publication number
EP0791687B1
EP0791687B1 EP97100937A EP97100937A EP0791687B1 EP 0791687 B1 EP0791687 B1 EP 0791687B1 EP 97100937 A EP97100937 A EP 97100937A EP 97100937 A EP97100937 A EP 97100937A EP 0791687 B1 EP0791687 B1 EP 0791687B1
Authority
EP
European Patent Office
Prior art keywords
web
liquid
press
medium
roll
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.)
Expired - Lifetime
Application number
EP97100937A
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German (de)
English (en)
French (fr)
Other versions
EP0791687A1 (de
Inventor
Bernhard Kohl
Martin Dr. Kustermann
Michael Dr. Trefz
Rüdiger Dr. Kurtz
Oswald Satzger
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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Filing date
Publication date
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Publication of EP0791687A1 publication Critical patent/EP0791687A1/de
Application granted granted Critical
Publication of EP0791687B1 publication Critical patent/EP0791687B1/de
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Classifications

    • 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
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
    • 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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters
    • 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
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • 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
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod

Definitions

  • the invention relates to a method and devices for Apply a liquid or pasty medium, such as Pigmented coating color, starch, Impregnation liquid on a running sheet of paper or cardboard containing waste paper.
  • a liquid or pasty medium such as Pigmented coating color, starch, Impregnation liquid
  • a device for applying a liquid or pasty Medium on a running material web according to the state of the Technology that works according to a conventional method known for example from US-A-4,848,268.
  • the device form two application rollers rotating in opposite directions a roller gap between them, through which the running Material web is passed through. Every application roller is a Assigned work, which via an order pressure chamber and a doctor element on the liquid or pasty medium Applying surface of the application roller. That on the surface the application roller is then applied by the Rotation of the application roller in the nip between the conveyed into both application rollers. There is the medium from the roller surface to the relevant side of the Transfer material web and at the same time into the material web pressed. This order process is considered indirect Order designated.
  • the one-sided indirect application is also from US-A-4,973,441 known.
  • the invention is therefore based on the technical problem to create a method and devices with which a high quality liquid or pasty medium on a running web of material can be applied without in or impurities on the material web Order quality can deteriorate.
  • a liquid or pasty medium such as pigmented coating color, starch or impregnating liquid on at least one side of the current Material web containing waste paper applied in a direct order. Then this is on the at least one side of the Liquid or pasty medium applied in material web a separate step into the running material web pressed.
  • the direct application of the medium on the Material web and the pressing of the medium into the Material web thus takes place in separate process steps. Since the press-in step follows the step of applying along the Direction of passage of the material web is connected, can Dirt particles or impurities that accumulate in the If necessary, press the press out of the material web, not get more into the upstream order area, in which the medium is applied to the material web.
  • the Detached particles or impurities can in the Area of the separate press-in step removed easily be so that they no longer point to the Material web arrive and there impairments of Can cause order quality. It also comes with the inventive method during the press-in process much less often to remove Dirt particles from the material web, as these have already been was coated with the liquid or pasty medium. In this way, smaller dirt particles are removed from the applied medium incorporated in a harmless manner, which removes dirt particles during pressing the medium into the running material web be reduced.
  • the direct application of the method according to the invention a desired final order quantity of liquid or pasty medium on any side of the running waste paper Material web in a single order step respectively.
  • the medium is preferably in in a single operation directly onto the material web plotted that the plotted amount of the desired final order quantity. This results in a compact process.
  • a pre-metering is carried out excess amount of liquid or pasty medium on the relevant side of the material web.
  • the previous dosing takes place applied to the relevant side of the material web predosed amount of medium to the desired final Order amount.
  • the support section of the material web on the surface of the The counter surface is, based on the direction of flow Material web, first assigned to the order plant and in Distance thereafter the press roll, the press roll with the Counter surface forms a press-in gap through which the Material web, on the support section of the counter surface lying on, is led through.
  • the running material web is along a support section on the surface of the counter surface supported and along this support section on the
  • the surface of the material web is initially a commissioned work for direct application of the medium and then a press roller for Press-in of the medium assigned.
  • Applying the medium and the press-in of the medium are spatially different from each other separated and dirt particles that may be in the Release press-in from the running waste paper-containing material web, only reach the surface of the press roll, from where they e.g. deducted using a suitable cleaning device can be. Detached dirt particles can, however not get into the commissioned work and so the quality of the Affect order.
  • the support section of the material web on the surface of the is the second counter surface, based on the Direction of travel of the material web, first the second Assigned work order and then the second one at a distance Press roll, the second press roll with the second Counter surface forms a press-in gap through which the Material web, on the support section of the second counter surface lying on, is led through.
  • the Invention of the first device according to the invention for Coating one side of the running web of material similar device for coating the other side of the downstream material web. So there are two counter surfaces rotating in opposite directions, over which the running material web first with one side and then with the other side. Every counter surface is in Direction of travel of the material web first a commissioned work and then assigned a press roll.
  • the commissioned work is the support section of the Material web assigned to the surface of the counter surface and the press roll is the one from the applicator with the medium provided side of the material web, based on the Direction of travel of the material web, at a distance after the Mating surface assigned and forms with the press roll counter roll a press-in gap through which the running material web is passed through.
  • this second is according to the invention Device the applicator, the counter surface and the press roller assigned its own press roll counter roll, while at previously explained first device according to the invention Applicator and the press roller a common counter surface assigned.
  • the second application is the support section of the Material web on the surface of the second counter surface assigned and the second press roller is the one from the second Commissioned work with the medium side of the material web, based on the direction of travel of the material web, at a distance assigned to the second counter surface and forms with the second press roll counter roll from a press nip through the running material web is passed through.
  • the second is in this embodiment Device according to the invention for coating one side a similar device for the running material web Coating the other side of the running material web downstream.
  • Each commissioned work is its own Mating surface assigned and each press roll is one assigned own press roll counter roll.
  • the rotating counter surfaces preferably in the form of rotating counter rolls.
  • the rotating counter surfaces but also in the form of rotating ones flexible endless belts.
  • Such revolving Endless belts are then driven by associated drive rollers, Deflection pulleys, tension pulleys and / or sliding or press shoes guided.
  • the two commissioned works face each other and are each one side of the running material web assigned that the web of material between the two Commissioned works is carried out. Furthermore, the two are Press rolls, based on the direction of flow of the Material web, at a distance according to the two commissioned works arranged that the two press rolls one between them Form press-in gap through which the running material web is passed, the running directions of the two Press rolls in the press nip with the direction of flow of the Material web match.
  • the third device according to the invention thus takes place first a direct application of a liquid on both sides or pasty medium on the material web by placing between two commissioned works is carried out, and then the previously applied is pressed in on both sides Medium into the material web by placing it between two with the Direction of travel of the material web co-rotating press rolls is passed through.
  • the device runs in a favorable embodiment Direction of travel of the material web, based on a horizontal plane, from bottom to top.
  • the Material web in a common pass plane both through the two applicators as well as the two press rolls passed.
  • doctor elements are preferably profiled Squeegee rods, smooth squeegee rods or squeegee blades.
  • the use of profiled doctor blades is insofar advantageous than then the metering of the medium to be applied done volumetrically, i.e. the amount of medium applied is practically independent of the machine speed. Thus, the desired amount of liquid or pasty medium can be applied very reliably.
  • the application units can be device as free jet application units be trained.
  • the device according to the invention is the two To design commissioned works as doctor blade element commissioned works a sump of the medium to be applied with a free one Form the liquid surface.
  • the associated one Direction of travel of the material web through the two sump application plants then runs in relation to a horizontal Level, top down.
  • the squeegee elements of the sump application works are preferably as profiled doctor rods, smooth doctor blades or doctor blades.
  • the devices according to the invention in the order works in a pre-metering device for direct application of an excess amount of liquid or pasty medium on one side of the running material web and a subsequent separate final metering device for Dosing the amount applied to the material web Medium to the desired final order quantity divide.
  • the pre-metering devices can then be used as Doctor blade element pressure chamber applicator units, doctor element sump application units, Free jet nozzle works or in be formed in a comparable manner.
  • the Final metering devices can be used as doctor blade final metering devices or in a similar way. be trained.
  • the application works are preferably in the inventive Devices, however, as ready-made order works trained, i.e. with them can be a desired final Quantity of medium applied directly to the material web be applied without the need for further dosing.
  • Doctor element pressure chamber applicators or doctor element sump applicators are preferably used.
  • the free jet application is on the top page an essentially horizontal, unsupported one Assigned to section of the material web and the press roll, based on the direction of travel of the material web, at a distance based on the free jet commissioned work previously with the medium assigned side of the material web and forms a press nip together with the press roll counter roll, through which the running material web is passed.
  • the direction of the press roll in the press nip coincides the direction of travel of the material web.
  • the fourth device according to the invention is therefore not required a rotating counter surface, i.e. for the commissioned work no assigned counter roller or no assigned endless belt required.
  • the direct application of the liquid or pasty Medium is essentially horizontal running, unsupported section of the material web. In Direction of travel of the material web seen before the position of the commissioned work is sufficient the arrangement of a deflection roller, around the material web in the essentially horizontal To redirect the running direction.
  • the free jet commission is at the fourth Device according to the invention preferably in the form of a Commissioned work based on the principle of a waterfall.
  • a Commissioned work based on the principle of a waterfall.
  • what is to be applied flows liquid or pasty medium like a waterfall from the application in an appropriately dosed amount to that under the Commissioned material web passing by.
  • the top side of the material web is so with the medium coated.
  • An advantage of the devices according to the invention is that by the separate provision of press rolls Material selection and the surface properties of the Press roll surface optimally to the requirements regarding a good press-in process can be adapted.
  • the material selection and the selection of the surface condition of the application roller mainly after that the medium is good on the Roller surface can be applied, i.e. the surface is well wettable.
  • the surface quality of the application roller cannot to the same extent on the press-in function of the application roller in Application roller gap to be coordinated.
  • At least Roll surfaces of the press rolls made of steel, rubber or Polyurethane trained. It can be advantageous in each case be, the roll surfaces of the press rolls in addition a non-stick cover with a comparatively small one To provide friction coefficient.
  • a non-stick cover exists preferably made of a material on polytetrafluoroethylene (PTFE) basis.
  • PTFE polytetrafluoroethylene
  • Teflon cover effectively avoids that Adhesion of the applied medium to the press rolls.
  • the press rolls can be used with a possible be smooth, hard surface, or with a soft surface with such a texture that the applied medium practically does not adhere to it.
  • the rotational speed preferably corresponds to Roll surface of the press roll of the throughput speed the material web in the press nip. So there is none Relative speed between the press roll surface and Material web in front, and thus practically none occurs On paper.
  • the press rolls are included provided a heater that at least the Roll surface heats. This will dry the accelerated applied medium on the material web.
  • a cleaning device is assigned to each press roll on a peripheral portion of its roll surface.
  • the cleaning device has a scraping blade, which pulls dirt particles, which were removed from the material web in the press-in nip, from the roller surface.
  • the inventive method and the inventive Devices are used to glue Material webs, but also for the application of various liquid or pasty coating media, such as Coating color with pigments, starch, impregnating solution and like.
  • FIG. 1 is a first embodiment of the Device according to the invention shown.
  • An ongoing Material web made of paper or cardboard is first about a deflection roller 10.
  • the direction of travel of the material web 7 is indicated by arrows along the material web.
  • the material web 7 is then in the direction of the arrow rotating counter roll 1 out.
  • the material web 7 lies thereby along the roller surface 1A of the counter roller 1 of a support section and is so during the run supported by the counter roller.
  • the Material web 7 of a second rotating in the direction of the arrow Counter roll 4 fed, on the roll surface 4A it rests along a support section and so during the Pass is supported.
  • the two commissioned works 2 and 5 are Doctor element-pressure chamber applicators of the same type, so that hereafter both orders, each only simplified are shown, together in their structure and their How it works will be explained.
  • the commissioned works 2, 5 comprise a support beam 17, 17 ', the other Add-on elements. Through a color distribution tube 11, 11 ' the liquid or pasty medium 8, 8 'to be applied to one Feed gap 12, 12 '. fed. In the direction of the arrow that will medium to be applied under pressure from an application chamber supplied between a doctor element 9, 9 'and a Boundary wall 18, 18 'is formed.
  • the doctor element 9, 9 ' is designed in the example as a profiled doctor rod, which in a doctor bed 15, 15 'rotatable about its longitudinal axis is stored.
  • a dashed line in the representation of the Doctor rod 9, 9 ' indicates the length of the doctor rod attached transverse grooves to the profile of the doctor rod establish.
  • the order chamber becomes pressurized standing medium 8, 8 'on the doctor element 9, 9' on the Material web 7 applied evenly.
  • the doctor rod 9, 9 ' is usually in the opposite direction to the direction of rotation Counter roll 1, 4 driven in rotation.
  • the profiling of the doctor rod 9, 9 ' that is, in the example transverse grooves arranged along its longitudinal extent, enables volumetric dosing of the applied Amount of medium, i.e. the desired final order quantity of medium can be added directly to the without further metering Material web 7 are applied. Because the commissioned work liquid or pasty medium directly onto the material web 7 orders, it is the so-called direct Assignment.
  • On the side facing away from the doctor rod 9, 9 ' Order chamber can excess, pressurized Medium between the boundary wall 18, 18 'and the counter roller 1, 4 flow into a collecting trough 13, 13 '.
  • a pressure hose 14, 14 ' is provided to the squeegee 9, 9 'with a desired pressing force against the counter roller To press 1, 4, a pressure hose 14, 14 'is provided.
  • the two press rolls 3, 6 are also from the example same type and are therefore common below explained.
  • Each press roll 3, 6 forms with the associated Counter roll 1, 4 from a press nip.
  • the one on the surface the counter roll 1, 4 lying material web 7 is by the Press-fit led.
  • the press roll 3, 6 is with a desired contact force F radially against the surface of the Counter roll 1, 4 pressed.
  • the press roll 3, 6 is in Direction of arrow driven in rotation.
  • the running speeds the surfaces of the press roll 3, 6 and the counter roll 1, 4 are the same, i.e. none occurs in the press-in gap Relative movement of the press roll 3, 6 relative to the material web 7, which rests on the counter roller 1, 4.
  • Order quantities can be the same or it can be for both parties different order quantities can be selected.
  • the device shown in Fig. 1 is used on both sides Application of liquid or pasty medium on a running waste paper containing Web. If you only take half of this device, either the left of the dashed line 16 or the shown on the right of the dashed line 16 in FIG. 1 Half, you get an embodiment of the Device according to the invention, which is for the order of a Medium on only one side of a running material web can be used.
  • the device according to the invention are the same or different corresponding components with the same reference numerals provided, as in the first embodiment in Fig. 1st As for the details of these components, therefore referred to the previous statements.
  • a running material web 7 is first over a Deflection roller 10 guided and then along one Support portion around the roll surface 1A of a counter roll 1 led around.
  • Material web 7 on the counter roller 1 is the material web Assigned to work order 2.
  • the counter roll 1 is in Direction of arrow driven in rotation and guides the material web 7 further by a at a distance after the counter roller 1 arranged press-in gap.
  • This press-in gap is between a press roll 3 and a press roll counter roll 19 educated.
  • the press roll 3 and the press roll counter roll 19 rotate in opposite directions to each other Arrow directions and are driven so that the Running speeds of the surfaces of the two rollers 2 and 19 the throughput speed of the material web 7 in Correspond to the press-in gap.
  • the two Rollers 6 and 20 rotate in opposite directions in the direction of the arrow to each other and are driven such that the Running speeds of their roller surfaces in the press nip with the throughput speed of the material web to match. Then the material web is over a Deflection roller 10 'forwarded.
  • doctor element pressure chamber applicators 2, 5 facing each other and forming a gap between them through which the running material web 7 is passed.
  • two press rolls 3, 6 one another arranged opposite one another and form one between them Press-in gap through which the material web 7 passes becomes.
  • the material web 7 is guided such that its Direction of travel, based on a horizontal plane in Fig. 3, runs from bottom to top.
  • the running material web 7 will along a common pass plane 22, which is shown in FIG. 3 is indicated by a dash-dotted line, both by the two commissioned works 2, 5 as well as by the two Press rolls 3, 6 passed through. This results in a Simple web guidance without changing the direction of the material web in the area of the application and press-in process.
  • doctor bars 9, 9 'of the two applicators 2, 5 form in addition to their respective order function for the liquid or pasty medium 8, 8 ', for each other Doctor rod a counter support.
  • This arrangement in which the two doctor rods 9, 9 'are pressed against each other, comes therefore without counter-rollers, which would otherwise have the counter-holding function when applying directly to the material web.
  • the two press rolls 3, 6 are also supported against each other and each with a desired Pressing force F pressed against each other.
  • the Running speeds of the roller surfaces of the two Press rolls 3, 6 correspond to the throughput speed of the Material web in the press nip.
  • Each roller surface 3A, 6A a cleaning device 21, 21 'is assigned.
  • the Cleaning devices 21, 21 ' are only schematic shown.
  • Each cleaning device has one Scraper blade 23, 23 'on the impurities or Dirt particles that may be in the Press-in gap can be detached from the material web 7 by peel off the roller surfaces 3A, 6A to prevent the impurities or dirt particles from the Press rolls 3, 6 on the already coated material web could be promoted.
  • Such or similar Cleaning devices are also useful on the Press rolls 3, 6 of the previously explained first and second Embodiments of the invention provided.
  • Heater devices 24, 24 ' are shown by dashed lines schematically indicated, each of which each press roll 3, 6 is assigned. With each of the rotating in the direction of the arrow driven press rolls 3, 6 in the example the area between the dashed circular line and the roller surface 3A, 6A heated. This will dry the previously liquid or pasty medium 8, 8 'applied on both sides accelerates when the medium 8, 8 'in contact with the heated roller surfaces 3A, 6A comes.
  • Both schematically illustrated heating devices 24, 24 'can are, for example, electrical heating devices or heating devices in which a circuit of a heated, for example liquid medium maintained becomes. Other suitable heating devices can also be used become. This also applies to the first and second ones explained above Embodiments according to FIG. 1 and FIG. 2 can press rolls 3, 6 there are provided with heating devices.
  • the running material web 7 first passes the two Commissioned works 2, 5 the running material web 7 a desired one final application quantity of liquid or pasty medium 8, 8 'are applied. The order is placed again immediately on the material web and both the order quantity as well the consistency of medium 8, 8 'can be on both sides of the Material web can be selected differently. This on both sides coated material web 7 then runs through the press nip between the two press rolls 3, 6. There it will previously applied medium 8, 8 'from both sides into the Pressed material web 7. Through the heated Roller surfaces 3A, 6A will dry out the Medium accelerated in the material web additionally.
  • FIG. 4 is a fourth embodiment of the Device according to the invention shown that in his Basic structure of the third exemplary embodiment according to FIG. 3 is similar. With regard to the arrangement and function of the Press rolls 3, 6 will therefore refer to the previous statements directed. Cleaning devices 21, 21 'and Heaters 24, 24 ', the fourth Embodiment may also be present are from Omitted for clarity. The fourth too
  • the running material web is in one embodiment common level 22 both through two opposite Application units as well as two opposing press rolls 3, 6 passed. The direction of travel of the material web 7 runs, with respect to a horizontal plane in Fig. 4, of top down.
  • the two opposing orders 2 ', 5' are in Example designed as a doctor element sump applicator.
  • the same or corresponding elements of these commissioned works are provided with the same reference numerals as in the previous ones explained doctor element pressure chamber applicators 2, 5. With regard to these elements, reference is made to the previous ones Executions referenced.
  • the paint to be applied flows from paint distribution tubes 11, 11 ' liquid or pasty medium 8, 8 'each in a sump free liquid level.
  • the swamp becomes liquid or pasty medium 8, 8 'under the action of gravity over the profiled doctor rods 9, 9 'to the respective side the material web 7 applied.
  • the applied Amount of medium of the valid desired order quantity correspond.
  • the order quantity and the Consistency of the medium 8, 8 'for both sides of the material web can be chosen differently.
  • the order is made on both sides directly onto the material web.
  • the material web 7 thus first passes through the two opposite commissioned works 2 ', 5', initially through the two swamps and then the Doctor bars 9, 9 'happens.
  • the medium applied on both sides 8, 8 ' is then in the press gap between the two Press rolls 3, 6 are pressed into the material web.
  • FIG device corresponds, apart from Commissioned work, the left of the dashed line 16 in Fig. 1 illustrated embodiment. Therefore, it will focus on those there References referred to and only the following different structure of the commissioned work explained.
  • the applicator is in a pre-metering device 25 and End dosing device 26 divided, each only are shown schematically.
  • the predosing device 25 is trained in the example as a free jet nozzle work, the via a feed gap 28 liquid or pasty medium directly to the relevant side of the running material web 7 applies.
  • the medium is applied in a free one Beam and in a larger than the desired final order quantity.
  • the final dosing device 26 doses in the example over a doctor blade 27 the excess amount to the desired final order quantity by doing the stripped too much applied medium 8.
  • the sixth embodiment shown in FIG Device according to the invention corresponds in its basic structure that shown in Fig. 2 to the left of the dashed line 16 Embodiment. Regarding more consistent Components is therefore based on the designs there directed.
  • the sixth embodiment Free jet nozzle application no final metering device downstream, but the free jet nozzle unit 25 carries directly the desired final amount of liquid or pasty medium 8.
  • the function and assignment of the free jet nozzle work 25 is based on the previous statements in Related to Fig. 5.
  • the sixth 6 is an additional embodiment Doctor element, as it is in the fifth embodiment in the form the doctor blade 27 is avoided. This will also avoided interference on such a doctor element, the may occur due to dirt on the doctor element could.
  • Both the fifth and the sixth embodiment can each have a similar device for coating the be connected downstream of the material web.
  • Guide or deflection rollers 10, 10 ' is the current Material web 7 in a substantially horizontal Running direction.
  • the material web is in this order area So not supported, but runs freely between the Guide or deflection roller 10 'and the downstream Press roll arrangement 3, 19.
  • the free jet applicator 29 consists of a color distribution tube 30, which has a Feed gap 31 with an overflow surface 32 is connected.
  • the Medium 8 to be applied passes from the paint distribution tube 30 the supply gap 31 onto the overflow surface 32 and flows from there in free fall to the one below Material web down.
  • the individual can Embodiments with each other in a variety of ways be combined.
  • the one shown in FIG Device for coating one side of the material web 7 with the device for coating the other side of the Material web can be combined in Fig. 2 on the right the dashed line 16 side is shown.

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EP97100937A 1996-02-21 1997-01-22 Verfahren und Vorrichtungen zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn Expired - Lifetime EP0791687B1 (de)

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Also Published As

Publication number Publication date
US6416580B1 (en) 2002-07-09
US6093248A (en) 2000-07-25
EP0791687A1 (de) 1997-08-27
DE19606459A1 (de) 1997-08-28
JPH09225391A (ja) 1997-09-02
DE59710973D1 (de) 2003-12-18

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