EP1646752A1 - Auftragsvorrichtung mit verstellbarer auftragsbreite - Google Patents
Auftragsvorrichtung mit verstellbarer auftragsbreiteInfo
- Publication number
- EP1646752A1 EP1646752A1 EP04766078A EP04766078A EP1646752A1 EP 1646752 A1 EP1646752 A1 EP 1646752A1 EP 04766078 A EP04766078 A EP 04766078A EP 04766078 A EP04766078 A EP 04766078A EP 1646752 A1 EP1646752 A1 EP 1646752A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gap
- limiter
- application
- distribution chamber
- application device
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000011111 cardboard Substances 0.000 claims abstract description 3
- 230000005484 gravity Effects 0.000 claims abstract description 3
- 239000011087 paperboard Substances 0.000 claims abstract description 3
- 235000011837 pasties Nutrition 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 54
- 239000013013 elastic material Substances 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 230000000670 limiting effect Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 239000002783 friction material Substances 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
-
- 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
-
- 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
- B05C5/0266—Coating heads with slot-shaped outlet adjustable in length, e.g. for coating webs of different width
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
Definitions
- the invention relates to an application device for applying a liquid or pasty application medium to a running material web, in particular a paper or cardboard web, with at least one distribution chamber for receiving application medium and at least one communicating with the distribution chamber and extending at least in a material web transverse direction Gap nozzle, which is designed to apply application medium to the material web at least under the influence of gravity, in particular curtain-like.
- a conventional application device of the type described above in which an application medium in the form of at least one curtain or veil of a certain width is delivered to a running material web.
- the application medium curtain emitted by the nozzle can indeed be wider than the material web or as a material web region to be provided with application medium.
- Application medium emerging from the gap nozzle must then be partially separated and collected in order to avoid contamination of the transport device or possibly a material web region that is not to be coated and to supply application medium that is not required to a recycling circuit for reuse.
- such a degassing device is complex and therefore cost-intensive and, on the other hand, can degas only a limited amount of application medium in a certain time unit. It has been found that only a color excess of approximately 10% can be returned or degassed for the curtain coating for certain colors without impairing the running speed of the application device. In special cases, the application medium, which can consist of different components, for example different colors, which combine in the gap, cannot be returned to the circuit. A so-called twin curtain (e.g. thermal or protective lacquer) cannot be reused, for example.
- twin curtain e.g. thermal or protective lacquer
- the invention is therefore based on the object of providing an application device of the type mentioned above, which enables the coating of material webs of different widths and minimizes or eliminates the effort for the return / recovery of application medium.
- an application device of the type mentioned above in which an effective application width, via which application medium is released from the gap nozzle during operation, can be set or selected in the transverse direction of the material.
- a first basic embodiment is preferred in which the Application device comprises a limiting device with at least one limiter arranged or formed in the distribution chamber and / or in a gap of the gap nozzle, which in a direct or indirect manner at least reduces the escape of application medium in at least one non-active region of the gap nozzle. This makes it possible to reduce the escape of application medium from the gap nozzle in an area of the gap nozzle which is assigned to an area outside the material web area to be coated.
- At least one limiter is arranged in the distributor chamber, which separates an area of the distributor chamber which is assigned to the non-active region of the gap nozzle and an area of the distributor chamber which contains application medium.
- the area of the distribution chamber which is free of application medium and which is created in this way thus indirectly prevents application medium from escaping from the non-active region of the gap nozzle assigned to it.
- a simple and therefore inexpensive implementation of such a limiter could include a molded part that is adapted to the interior of the distribution chamber.
- End faces facing the distribution chamber have at least one seal, in particular a Q-ring seal encircling the molded part, or that the molded part has at least one sealing lip, in particular a sealing lip encircling the molded part, on its edges facing the inner walls of the distribution chamber.
- seals can be made, for example, of rubber or a comparable sealing material in order to essentially seal the molded part against the inner walls of the distribution chamber against the passage of application medium.
- the limiter comprise an elastic material which is supplied by an operating medium or / and Exercise of compression forces against an inner wall of the distribution chamber is expandable in sealing engagement. This has the advantage that the sealing engagement between the limiter and the inner walls of the distribution chamber can be activated or deactivated by controlling the supply of the operating medium.
- Such an optionally expandable limiter could, for example, include a cavity surrounded by the elastic material, which could be filled with air in such a way that, when the limiter is activated, the elastic material is pressed into sealing engagement against an inner wall of the distributor chamber, in order in this way to cover the area free of application medium to essentially seal off the area containing the application medium.
- a limiter arranged in the distribution chamber can also be designed such that the limiter has at least one sealing element and at least one actuating element that can be brought into engagement or brought into engagement with it on at least one wedge surface, and that the sealing element acts on the actuating element on the wedge surface against an actuating force exerted thereon Inne ⁇ wandung the distributor chamber can be brought into sealing engagement.
- the limiter has at least one sealing element and at least one actuating element that can be brought into engagement or brought into engagement with it on at least one wedge surface, and that the sealing element acts on the actuating element on the wedge surface against an actuating force exerted thereon Inne ⁇ wandung the distributor chamber can be brought into sealing engagement.
- the limiter comprise: at least two wedge bodies serving as an actuating element, the sides of which facing the inner walls of the distributor chamber have wedge-like bevels as wedge surfaces, the at least one sealing element on the one hand on the bevels and on the other is supported or can be supported on an inner wall of the distribution chamber, wherein the wedge bodies can be moved towards or away from one another by an actuating arrangement which preferably comprises a screw-thread arrangement, in order to exert a force directed essentially in the direction of the inner wall on the counter body.
- a limiter can comprise at least one liquid outlet which is designed to dispense separation liquid, in particular water, in association with the limiter and / or in association with the area free of application medium.
- separation liquid in particular water
- the use of a separating liquid for sealing the area containing the application medium against the area free of the application medium has the advantage that the separating liquid can easily adapt to the interior of a distribution chamber or a gap.
- the limiter comprises a base body filling only a part of the cross section of the distribution chamber, leaving a release liquid supply area free, which has at its end assigned to the area containing the application medium or this end adjacent a shaped piece which is adapted to the interior of the distribution chamber, which separates the separating liquid supply area from / the area of the distribution chamber containing application medium.
- the gap nozzle can also be connected to the separating liquid supply area.
- Application devices with limiters designed in this way also have the advantage that they can clean the application medium-free region of the distributor chamber and / or the non-active region of the gap nozzle with the aid of the separating liquid. It is possible to prevent the application medium from getting stuck in places that are difficult to clean.
- At least one gap limiter can be provided in a gap of the gap nozzle or at an exit end of the gap, which delimits the gap in the non-active area of the gap nozzle essentially seals from application medium.
- a limiter is preferred which seals both the gap area and the distributor chamber, since otherwise application medium standing above the non-active region of the gap nozzle in the distributor chamber can form undesirable deposits.
- the gap limiter controllable in a simple manner, it can have a pneumatically or hydraulically actuated pressure stamp arrangement, at least one pressure stamp being arranged in a gap surface delimiting the gap and when the pressure stamp arrangement is actuated the pressure stamp is pressed against an opposite gap surface.
- the gap limiter can also be used or used in a simple and therefore inexpensive manner as a seal, in particular a seal made of an elastic material.
- a Q-ring in particular a rubber O-ring, or else an elastic band running through the gap in the flow direction of the application medium is conceivable as a seal.
- an elastic band it can be provided that the elastic band starts from a holding body positioned or positionable in the distribution chamber, which is dimensioned and designed such that it cannot be inserted into the gap in order to position the elastic band in the gap ,
- an absorbent material possibly a wooden part or a suitable porous plastic / foam part
- an expandable gap limiter could comprise an elastic material which is expandable by supplying an operating medium and / or by exerting compression forces in sealing engagement with the gap surfaces delimiting the gap.
- Such gap limiters have the advantage that they can adapt flexibly to an internal structure of the gap in order to achieve a good sealing effect.
- a reduction in the discharge of application medium from a non-active region of the gap nozzle can be achieved by a limiter which comprises a sealing body which is adapted to the outer shape of the nozzle in the region of the nozzle outlet and is arranged on the outside of the nozzle or can be arranged.
- a limiter is relatively easy to operate and adjust because it is easily accessible from the outside.
- such a sealing body, which is arranged or can be arranged on the outside of the nozzle can have a band-like or web-like seal with a thickness of approximately the gap width which can be accommodated or accommodated in the gap of the nozzle in order to increase the sealing effect.
- a delimiter of the distribution chamber or / and of the gap formed according to at least one of the above proposals can be arranged at least two different positions along the transverse direction of the material web.
- the limiter can preferably be continuously displaceable along the material path transverse direction over at least a predetermined distance.
- the limiter comprises a guide body which is adapted to the interior of the distribution chamber and / or the interior of the gap and during the displacement of the limiter Limiter along the distribution chamber and / or along the Gap leads. It is also proposed to provide the application device with a positioning mechanism which is coupled or can be coupled to the limiter, in order to change the position of the limiter.
- the limiter is formed by a seal from an elastic band passing through the gap in the flow direction of the application medium, which is provided in the manner described above with a holding body positioned or positionable in the distribution chamber, it can be provided that the elastic band with one end section protrudes from the nozzle outlet, and that the elastic band for changing the position of the limiter can be gripped by hand and / or coupled or coupled to the positioning mechanism in order to release a sealing engagement between the band and boundary surfaces of the gap by exerting tensile forces or / and to move the elastic band along the transverse direction of the material web by exerting pushing forces.
- the holding body can be designed with a low-friction material, in particular with Teflon, at its points or surfaces contacting the walls of the distribution chamber.
- the limiter can be designed with an edge guide for the application medium emitted by the gap nozzle.
- an edge guide can serve, for example, to define the job width even more precisely and thus to further reduce the amount of job medium lost or to be returned.
- an edge guide can advantageously stabilize the curtain, as is known per se.
- the limiter at its end facing the area containing the application medium or at this end adjacent has an outlet for a guide and / or separation liquid.
- Applying liquid to the distribution chamber and / or the gap in the area of the limiter or / and in the area free of application medium can on the one hand seal the area free of application medium from the area containing application medium but on the other hand also to clean this area and to reduce the friction between the limiter and the interior of the distribution chamber or the gap. In this way, drying out or contamination of the gap can be prevented.
- a guide fluid film can be formed on the edge guide by supplying guide liquid through the outlet. The guide, separating or cleaning liquid can be drained off in a suitable manner after use and, if necessary, reused.
- the teaching of the present invention is also realized with an application device according to a second basic embodiment of the invention, in which the gap nozzle can be aligned in at least two different angles with respect to the material web transverse direction, preferably continuously adjustable in at least one angular range.
- Such an angle adjustment changes the effective application width in a simple manner without using a limiter arranged or formed in the distribution chamber and / or in the gap nozzle, such a limiter being able to be provided, however. Since when changing the alignment angle of the gap nozzle with respect to the material web transverse direction, the amount of application medium given in relation to a section of the material web transverse direction is changed, it is considered advantageous if the amount of application medium delivered by the application device per unit of time can be adapted accordingly.
- the application device for the optional assembly of at least two gap nozzles of different widths in the transverse direction of the Material web is designed.
- Such an application device can then have a set of gap nozzles of different widths in the transverse direction of the material web, which can optionally be installed.
- This embodiment is particularly suitable for application devices with which only certain types of material webs with a predetermined width are to be processed, because of their simple structure.
- 1-3 show a total of seven exemplary embodiments for a limiter arranged in a distribution chamber according to the invention in a sectional view.
- 4a ⁇ lc show exemplary embodiments of a limiter arranged in the gap of a gap nozzle according to the invention in a section plane running perpendicular to the longitudinal direction of the gap.
- 4d, 4e show two exemplary embodiments for a gap limiter comprising a sealing body according to the invention in a sectional plane running perpendicular to the longitudinal direction of the gap.
- FIG. 5 shows two sectional views of a limiter which can be acted upon by a liquid and which is arranged in a distribution chamber.
- FIG. 6 shows a limiter arranged in a distribution chamber with an edge guide which can be acted upon by liquid.
- FIG. 7 shows a perspective view of a limiting device with guide bodies. 8 shows the limiting device of FIG. 7 in two sectional views in connection with a positioning device.
- FIG. 9 shows two schematic views of a further exemplary embodiment of the limiter according to the invention.
- FIG. 10 shows two sectional views of the limiter according to FIG. 6 in connection with a positioning device and a liquid supply.
- FIG. 1 shows the application device in a sectional view with a cutting plane running parallel to the material web and illustrates three exemplary embodiments for a limiter 12a, 12b, 12c arranged in a distributor chamber 10 of the application device.
- the distributor chamber 10 is delimited by inner walls 14 and opens into a gap 16 of the gap nozzle 18 in its lower region.
- the limiter 12a-g used to separate an area containing application medium from an area free of application medium in accordance with the present invention is adapted in shape to the interior of distribution chamber 10 and can be brought into sealing engagement with the inner wall 14 of distribution chamber 10 in order to allow application medium to pass through from an application medium Prevent area in an area free of application medium.
- the position of the limiter in the distributor chamber can be shifted along the longitudinal direction of the gap, for example over a range of approximately 1 m.
- the limiter 12a is formed by a fitting, for. B. made of metal or from a flexible or swelling material, which is relatively exactly adapted to the course of the inner walls 14 of the distribution chamber 10.
- a limiter is suitable, for example, for an application medium with a high viscosity and can be manufactured very pressure-resistant.
- the sealing engagement between the shaped piece and the inner wall 14 can be improved by seals 22 which run around the limiter 12b and are made in grooves 20 of the shaped piece.
- the seals 22 can be made of an elastic material, in particular rubber. In order to further improve the sealing effect, two or more seals 22 running parallel to one another can be provided in the end face of the shaped piece.
- the limiter 12c has sealing lips 26 on its edges 24 running along the inner wall 14 of the distribution chamber 10, which are attached to the molded part of the limiter 12c on the one hand and come into sealing contact with the inner walls 14 on the other hand.
- a circumferential sealing lip 26 is preferably provided both on the edge 24 facing the application medium-containing area and on the edge 24 facing the application medium-free area.
- a limiter 12d according to a fourth exemplary embodiment has a cavity 28 which is surrounded by an elastic material 30, for example a rubber membrane. Via an opening 34 made in a connecting element 32, the cavity 28 can be filled with air serving as a filling medium until the elastic material has expanded sufficiently to allow contact with the inner wall 14 of the distribution chamber 10 to be sealed.
- an elastic material for example a rubber membrane.
- the cavity 28 can be filled with air serving as a filling medium until the elastic material has expanded sufficiently to allow contact with the inner wall 14 of the distribution chamber 10 to be sealed.
- z For example, to maintain a substantially rectangular cross-sectional shape of the seal, as shown in FIG.
- the elastic material 30 of the side surfaces 36 should be solidified (for example vulcanized) or additionally reinforced with respect to the 5 end sections 38.
- the cross-sectional geometry of the distribution chamber seal can be adapted to any distribution chamber geometry, e.g. B. as shown or as a semicircle.
- the limiter 12e also operates according to a fifth pneumatic embodiment (FIG. 2 center) according to a similar pneumatic or hydraulic principle.
- This consists of a base body 40 and an elastic material 42 which partially surrounds the base body.
- the elastic material 42 is sealed to the base body in the region of the side surfaces 44 of the base body 40
- the cavities 46 are connected to an inlet opening 50 of the base body 40 via guide channels 48 in the interior of the base body 40.
- the cavities 46 can be filled with an operating medium supplied from the outside, for example air, so that the elastic material 42 surrounding the cavities 46 can be pressed flatly into sealing engagement against the inner walls 14 of the distributor chamber 10.
- the pressure of the supplied operating medium can be reduced to such an extent in a limiter according to the fourth or fifth exemplary embodiment that the frictional engagement between the elastic material 36 or 42 and the inner wall 14 of FIG Distribution chamber 10 is reduced so far that the limiter 12d or 12e can be moved along the gap direction A.
- the limiter 12d, 12e according to the invention in such a way that it can be operated with a constant operating medium pressure and on the one hand is displaceable at this pressure, but on the other hand at the same time ensures an adequate seal 5 between the region of the distribution chamber 10 which contains the application medium and the region free of the application medium.
- Limiter 12f consists of two parallel plates 52, spaced apart from one another and oriented perpendicular to the splitting direction A, which are connected to one another by an adjusting screw 54 penetrating the plates 52 approximately centrally. The pair of plates 52 can then be between a head 56 of the screw 54 and a nut 58 screwed onto the screw 54
- the end faces of the plates 52 each have wedge-shaped bevels 62, against which a sealing element 63 with corresponding inclined surfaces 64 abuts.
- the sealing element 63 is an annular body or a partial annular body, which runs around the plates 52 along their end faces and can be brought into sealing engagement against the inner wall 14 of the distributor chamber 10.
- the distance between the plates 52 can now be reduced by tightening the screw 25 54 against the nut 58, as a result of which the sealing element 63 with its inclined surfaces 64 slides along the wedge-shaped bevels 62 of the plates 52 and against the inner wall 14 of the distribution chamber 10 is pressed in order in this way to effect the sealing of the limiter 12f against the passage of application medium 30.
- FIG. 3 Another example of an actuatable by means of a screw arrangement Limiter 12g is illustrated in FIG. 3. Similar to the sixth exemplary embodiment (FIG. 2 on the right), the limiter 12g also has two parallel plates 66, 67, the spacing of which can be adjusted by a screw 68.
- the screw 68 is formed with an elongated shaft and screwed into a sleeve 70 passing through the plates 66, 67.
- the sleeve 70 is in turn firmly connected to the first plate 67, while it passes through the second plate 66 so that it can be moved in the screw direction.
- the screw 68 is unscrewed from the sleeve 70 by a certain distance, as a result of which the plate 67 connected to the sleeve 70 and the plate 66 resting on a lock nut 72 come closer. While the distance between the plates 66, 67 is reduced, an elastic cushion 74 arranged between the plates is compressed in the direction of the screw 68. The compressed cushion 74 then yields in the direction of the inner wall 14 of the distributor chamber 10 and seals the limiter 12g.
- the length of the sleeve 70 gives the compression path for the cushion a stop, since after a certain unscrewing of the screw 68 the lock nut 72 strikes against an end face of the sleeve 70.
- FIGS. 4a to 4e show five exemplary embodiments of a limiter arranged in the region of the gap nozzle, which is intended to prevent application medium from escaping in a non-active region of the gap nozzle.
- the gap nozzle generally designated 18, is shown in a sectional view along a sectional plane running perpendicular to the longitudinal longitudinal direction A.
- the gap limiter 80a has a pressure stamp 82 which is embedded in a boundary surface 84 of the gap 16.
- an operating medium for example air
- a feed line 86 can be supplied to the pressure stamp 82 via a feed line 86, as a result of which the stamp 82 can be pressed against the opposite boundary surface 88 of the gap 16, in order to prevent the application medium from passing through the gap 16 in this area seal. Since a displacement of the pressure stamp 82nd along the longitudinal slot direction A can only be realized with a relatively high level of technical complexity, it is expedient to adjust the application width of the application device to arrange a plurality of optionally operable pressure stamps 82 along the longitudinal slot direction A.
- the latter is formed by a seal 90 which is fitted in a groove 92 in a boundary surface of the gap 16.
- a seal 90 can be made of rubber, for example, and can be designed to be continuously displaceable along the longitudinal longitudinal direction A in order to enable a continuous change in the application width.
- FIG. 4c shows a gap limiter 80c according to a third exemplary embodiment, which has an elastic band 94 passing through the gap 16, which is connected to a holding body 96 at its end opening in the distribution chamber 10.
- the elastic band 94 is made, for example, of rubber and, in a state in which it is insulated from the gap nozzle 18 and is not under tension, has a thickness which is equal to or slightly larger than the gap width (approx. 0.5 mm) of the gap 16.
- the elastic band 94 inserted into the gap 1 reliably seals it over its entire height.
- a lower end 98 of the elastic band 94 can be gripped by hand or by a positioning device in order to expand the elastic band 94 along the flow direction B of the application medium.
- This expansion causes a reduction in the thickness of the band 94, as a result of which the sealing engagement and thus also the frictional engagement between the elastic band 94 and the boundary surfaces of the gap 16 is reduced or eliminated and one Displacement of the limiter 80c is made possible.
- the contact surfaces 102 of the holding element 96 are coated with Teflon or the like.
- FIG. 4d and 4e illustrate two gap limiters 80d and 80e, which can be brought up to the exit region 104 of the gap 16 from the outside.
- the limiters 80d and 80e each have a sealing body 106, which is notched in the sealing area in accordance with the outer shape of the nozzle outlet 104.
- a positioning device or is coupled to it To actuate the sealing body, it is gripped by a positioning device or is coupled to it, is moved into the desired position along the longitudinal longitudinal direction A and is pressed against the outlet 104 of the gap nozzle 108.
- Execution game additionally has a web 108 which with the
- Sealing body 106 is connected and for guiding the sealing body and for
- the limiter 110 comprises a base body 112, which can be made of plastic, for example, and on the end facing the region 114 containing the application medium, a shaped piece 116 is formed which is adapted to the interior of the distributor chamber 10.
- the base body 112 On its underside, the base body 112 has a liquid channel 118, via which separating liquid (sealing water) can be fed to the shaped piece 116.
- the shaped piece 116 At its lower edge facing the area 114 containing the application medium, the shaped piece 116 has a liquid outlet 120, from which the separating liquid can be dispensed into the gap 16.
- the liquid channel 118 has openings 122 in its wall, from which separating liquid can be dispensed into the application medium-free area 124 of the distribution chamber 10 or the gap 16.
- the base body 112 can be coupled to a positioning device.
- a limiter 210 comprises a shaped piece 212 which can be brought into pneumatic or hydraulic sealing engagement with the inner wall 14 of the distribution chamber 10 in the manner described in the fifth exemplary embodiment of the storage chamber delimiter (FIG. 2 center) ,
- the limiter 210 has a liquid supply channel 214 and a liquid outlet 216 connected to it on the lower edge of the shaped piece 212 facing the area 218 containing the application medium.
- an edge guide 220 formed on the shaped piece 212 and passing through the gap 16 can be acted upon with a guide liquid film on its contact surface 222 with the application medium.
- the edge guide 220 also serves as a gap seal and is formed for this purpose from a sheet coated with vulcanized rubber.
- a limiter 310 comprises egg nl according to the middle one
- the sealable molded part 312 with a guide body 314 attached to it and a gap seal 316 with a guide plate 318 attached to it.
- the guide body 314 is adapted to the interior of the distribution chamber (not shown) and prevents adjustment during adjustment of the limiter 310 an application width a tilting of the shaped piece 312.
- the base body 314 has a through-channel 319 through which a feed pipe 320 for pneumatically or hydraulically actuating the seal of the shaped piece 312 and the gap seal 316 is passed.
- the gap seal 316 is formed by a sheet metal provided with an elastic material, the elastic one Material encloses the sheet metal in a tube-like manner and can form cavities 322 on both sides of the sheet. These cavities 322 are also in fluid communication with the connecting pipe 320, so that when the seal of the fitting 312 is actuated in an analogous manner, the gap is also sealed.
- FIG. 8 shows in a schematic sectional view how such a limiter 310, at the end of the gap exit end of which an edge guide 326 is attached, can be coupled to a positioning device 328.
- the positioning device 328 which is only shown schematically, has a first arm 330, which is attached to the base body 314 on its side facing away from the shaped piece 316, and a second arm 332 which is connected to the edge guide 326.
- the first arm 330 and the second arm 332 are fixedly connected to one another via a connecting section 334 for common movement, which results in a synchronous displacement of the limiter 310 and the edge guide 326 along the gap longitudinal direction A by a significant distance, for. B. by up to about 1 m.
- a protective plate 336 can be fastened to the surface side of the molded part 312 facing the application medium by means of a screw 335.
- the protective plate 336 can at the same time serve to cover the section of the elastic material used for the seal, which is wrapped around the edge 338 of the form piece 312, and thus to hold it securely.
- FIG. 9 shows an exemplary embodiment in which a sealing material, for example a plastic or metal foil 414 with the end faces 416 of a shaped piece 412, provides a cavity for a pneumatically or hydraulically actuated seal to build.
- a sealing material for example a plastic or metal foil 414 with the end faces 416 of a shaped piece 412
- a sealing material for example a plastic or metal foil 414 with the end faces 416 of a shaped piece 412
- FIG. 10 shows how a limiter 210, which has already been explained in more detail with reference to FIG. 6, can additionally be designed to load the distribution chamber 10 with application medium.
- a channel 420 is introduced into the shaped piece 312, through which a pipe 422 which can be filled with application medium is passed and can be connected to the limiter 210 for the joint movement.
- the tube 422 is connected at a section led out of the distribution chamber 10 to a positioning device 424, which enables the tube 422 to be displaced in the longitudinal gap direction A. Due to the fixed connection between the tube 422 and the fitting 212, the positioning movement of the limiter 210 is also carried out for setting the application width.
- the tube 422 can be connected, for example by means of an elastic hose, to a supply device for supplying application medium.
- a flushing or cleaning liquid for cleaning the distribution chamber 10 or the gap 16 can also be fed to the application device via the pipe 422.
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003131325 DE10331325A1 (de) | 2003-07-10 | 2003-07-10 | Auftragsvorrichtung mit verstellbarer Auftragsbreite |
| PCT/EP2004/051244 WO2005005728A1 (de) | 2003-07-10 | 2004-06-25 | Auftragsvorrichtung mit verstellbarer auftragsbreite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1646752A1 true EP1646752A1 (de) | 2006-04-19 |
Family
ID=33560036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04766078A Withdrawn EP1646752A1 (de) | 2003-07-10 | 2004-06-25 | Auftragsvorrichtung mit verstellbarer auftragsbreite |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1646752A1 (de) |
| DE (1) | DE10331325A1 (de) |
| WO (1) | WO2005005728A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009101321A (ja) * | 2007-10-25 | 2009-05-14 | Voith Patent Gmbh | 塗工幅調整装置 |
| DE102023106581A1 (de) * | 2023-03-16 | 2024-09-19 | Voith Patent Gmbh | Vorrichtung und Verfahren |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248579A (en) * | 1979-10-10 | 1981-02-03 | Jyohoku Seiko Co., Ltd. | Film extrusion die |
| DE3339780A1 (de) * | 1983-11-03 | 1985-05-15 | Sandy Hill Corp., Hudson Falls, N.Y. | Vorrichtung fuer das aufbringen einer steuerbaren schicht eines saettigungs- oder beschichtungsmittels mittels eines freifallenden vorhangs und verfahren hierfuer |
| DE4130432C2 (de) * | 1991-09-13 | 1995-04-06 | Kuesters Eduard Maschf | Auftragselement für flüssiges, schaumförmiges oder pastenförmiges Auftragsmedium |
| EP0579142B1 (de) * | 1992-07-17 | 1997-11-19 | The Cloeren Company | Interne Randbegrenzungsvorrichtung |
| US6319552B1 (en) * | 1992-09-11 | 2001-11-20 | Stora Enso North America Corp. | Method of decreasing skip coating on a paper web |
| DE19518604A1 (de) * | 1995-05-23 | 1996-11-28 | Nordson Corp | Schlitzdüse |
| DE19631888A1 (de) * | 1996-08-07 | 1998-02-12 | Voith Sulzer Papiermasch Gmbh | Auftragwerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Streichmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton |
| AU6444198A (en) * | 1997-03-31 | 1998-10-22 | Beloit Technologies, Inc. | A coating apparatus for applying coating material |
| WO1999009253A2 (de) * | 1997-08-15 | 1999-02-25 | Jagenberg Papiertechnik Gmbh | Verfahren und vorrichtung zum auftragen einer pigmentstreichfarbe auf eine papier- oder kartonbahn |
| DE19830728C2 (de) * | 1998-07-09 | 2001-08-02 | Reinhard Duespohl Maschb Gmbh | Kleber-Auftragsvorrichtung |
-
2003
- 2003-07-10 DE DE2003131325 patent/DE10331325A1/de not_active Withdrawn
-
2004
- 2004-06-25 WO PCT/EP2004/051244 patent/WO2005005728A1/de not_active Ceased
- 2004-06-25 EP EP04766078A patent/EP1646752A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005005728A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10331325A1 (de) | 2005-02-03 |
| WO2005005728A1 (de) | 2005-01-20 |
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