EP0472050B1 - Apparatus for applying a liquid-film to a material web - Google Patents

Apparatus for applying a liquid-film to a material web Download PDF

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Publication number
EP0472050B1
EP0472050B1 EP91113234A EP91113234A EP0472050B1 EP 0472050 B1 EP0472050 B1 EP 0472050B1 EP 91113234 A EP91113234 A EP 91113234A EP 91113234 A EP91113234 A EP 91113234A EP 0472050 B1 EP0472050 B1 EP 0472050B1
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EP
European Patent Office
Prior art keywords
liquid
working width
liquid distribution
over
distribution
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.)
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EP91113234A
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German (de)
French (fr)
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EP0472050A3 (en
EP0472050A2 (en
Inventor
Gerold Fleisner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Publication of EP0472050A3 publication Critical patent/EP0472050A3/en
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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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/04—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by pouring or allowing to flow on to the surface of the textile material
    • D06B1/06—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by pouring or allowing to flow on to the surface of the textile material flowing along an inclined surface

Definitions

  • the invention relates to a device for applying a liquid film which is uniformly thin over the working width, laminarly flowing on a continuously moving web of material - preferably a large width - with a liquid distribution device fed with a liquid conveyed by a pump with a liquid distribution space and an associated, subsequent guide surface , from the lower edge of which the flowing liquid film runs onto the material web, the liquid distribution space being connected to a pump on the one hand via an inflow line and on the other hand extending to the guide surface over a working width which is larger than the cross section of the inflow line.
  • a device of this type is known from DE-A-35 22 320. It has the advantage that a quick change of the application liquid by type or color is possible with this device without the associated production loss or rejects of the web to be wetted, a uniform distribution and a constant amount of the application liquid being ensured over the working width. This is brought about by a liquid distribution space upstream of the guide surface, which is small in volume. In this way, the calming of the liquid inflow flow down to the guide surface, which is necessary to form a laminar liquid film, is achieved.
  • the calming of the liquid inflow flow is necessary in such a device because the liquid volume within this liquid distribution space is only very small, but the amount of liquid applied over the working width of more than 30 l / min / m working width is very large and thus the inflow of liquid into this device is distributed over multiple inflow lines is very strong.
  • the invention has for its object to develop a device with which the line of color change is now possible with a constant application area of the fast color change and a small liquid volume in an application device with the advantageous pouring principle and thereby still reduces the previously required liquid volume within the device can be.
  • the solution to the problem is that the distribution of the liquid from the inflow line to a plurality of outflow openings is gradually provided such that the inflow opening is connected on both sides in the working width direction to an equally long first branch line the respective end of which is provided with an intermediate outflow opening, which is followed in the same way by a second branch line, shorter by half of the first branch line and reduced in cross-section, on both sides in the working width direction, so that the liquid distribution in this liquid distribution device branches out several times like a family tree, and so that the fine Outflow openings distributed over the working width open into a connecting gap which extends over the working width of the web and opens into the liquid distribution space adjacent to the guide surface.
  • a rotary screen printing machine is dealt with in this document. The printing paste released there by this distribution device is then pressed through a screen provided with holes for producing a pattern.
  • the tasks to be performed by a distribution device in a printing press are very different from those in a pouring device.
  • the distribution device is used to produce a film that flows laminarly evenly across the working width, which of course is of no importance in a printing press. It is therefore the aim of the device according to the invention to bring about the calming and the lateral distribution of the liquid flowing in through the inflow line in the limited liquid distribution space, in such a way that there are no streaks of mixed colors when changing colors.
  • the laminar flowing film is produced by a correct connection of the distribution device to the guide surface. It is therefore no longer necessary to have the calming space still required according to the aforementioned publication, so that the volume of liquid required in the application device can be kept considerably lower.
  • a particularly advantageous way of designing the liquid distribution space with the branch tree-like branching of the liquid from the inflow line to the multiplicity of liquid outlet openings is that the branch lines extending in the working width direction and the intermediate outflow openings adjoining the end of this branch line are in the form of holes can be introduced into corresponding thin sheets. It is therefore particularly advantageous to form the liquid distribution device by a large number of such sheets and to arrange the branch lines and holes to be produced in these sheets according to a specific program such that there is a uniform, family tree-like branching of the lines from the inflow line to the large number of outflow openings that over the connection gap initially an overflow weir or equal are assigned to the guiding surface.
  • the liquid application device consists of a carrier 1, the 90 ° corner of which is oriented upwards.
  • One leg of the angle bracket is the baffle wall 2, which is oriented obliquely upwards in the direction of the overflow weir 3.
  • the guide surface 4 adjoins the overflow weir 3, via which the uniformly distributed liquid film runs off and flows onto the material web 5 that runs along it.
  • the web 5 is carried with the pile arranged upwards over a deflection roller 6.
  • a solid body 7 is arranged on the side opposite the baffle wall 2, the wall of which is associated with the baffle wall 2 serves as a diffuser wall 8. This wall 8 can also be aligned parallel to the baffle wall 2, so that a slot 9 'is formed as a distribution space.
  • the distribution chamber 9 which widens conically to the overflow weir 3, is formed.
  • the distribution space can also run in the form of a slot without a cone, as shown in FIG. 4 or 5.
  • the body 7 extends with the remaining parts of the paint applicator 1 over a working width of one to six meters and is only provided with a few inflow hoses 10 over this working width, via which the required amount of liquid is fed to the applicator with a pump, not shown.
  • the device shown corresponds to the application device according to DE-A-35 22 320.
  • liquid distribution system which is arranged in the body 7.
  • the hose 10 is placed over a mouthpiece 11 which is held in the body 7 in the area of the reference number 12 and is screwed with its lower end into the so-called liquid distribution device 13.
  • the liquid distribution device can also be oriented perpendicular to the baffle wall 2 and not parallel to the baffle wall - as shown in FIG. 5.
  • This liquid distribution device 13 is shown in detail in FIGS. 2 and 3. It consists of a plurality of sheets 14, which are arranged parallel to each other and pressed together after assembly. In the uppermost plate 15 of this liquid distribution device 13, only one hole is drawn, which forms the liquid inflow opening 16 of a branch line 18, 19 of limited working width according to FIGS. 2 and 3.
  • a liquid distribution system extends from each of the liquid inflow openings 16 to the lower side of the individual liquid distribution device 13, which extends over an exact working width, but which is only a fraction of the total width of the application device.
  • the distribution of the liquid flowing in through the inflow opening 16 takes place in the liquid distribution device, which is filled by the individual sheets 14.
  • this distribution device has eight sheets 14 arranged parallel to one another, which results in a distribution of the liquid flowing in through the inflow opening 16 over a total of sixteen liquid outflow openings 17. This is achieved in that the distribution of the liquid width from sheet to sheet is gradually forced.
  • first branch lines 18, 19 of equal length are arranged on both sides of the liquid inflow opening 16 in the working width direction - according to FIG. 2 both to the right and to the left - an intermediate outflow opening 20, 21 is provided at the respective end of the latter.
  • These two intermediate outflow openings 20, 21 are drilled in the sheet 14 arranged underneath.
  • the liquid distribution device is formed from a plurality of sheets 14 arranged parallel to one another, each of which has either an intermediate outflow opening 20, 21 or a branch line 18, 19, 22, 23.
  • the bores 20, 21 and, as elongated holes, the branch lines 18, 19, 22, 23 are introduced into the individual sheets at such points that this pedigree-like branching according to FIG. 2 results after assembly.
  • the division of the entire working width from 1 to 5 m into such areas, which corresponds to a liquid distribution device shown in FIG. 2, has the advantage that the liquid supplied through the hoses 10 can be distributed exactly evenly over a large working width.
  • the more important advantage of achieving the compulsorily uniform distribution of the liquid over the working width is without being able to manage a common larger storage space which extends over the working width.
  • Those from the liquid outlets 17 Evenly emerging liquid only accumulates in the connecting gap 24 which now extends over the entire working width of the web. A dynamic pressure arises there because this connecting gap 24 is followed by a liquid distribution space 25, which also extends over the working width and whose flow height is smaller than the depth of the connecting gap 24.
  • the liquid comes from the liquid distribution device 13, distributed uniformly over the working width.
  • the larger liquid distribution chamber 9 shown in FIG. 1 is only necessary to a limited extent.
  • the liquid distribution device 13 is only assigned a guide surface in the form of a guide plate 27, through which the liquid distributed evenly over the working width by the liquid distribution device 13 flows after flowing through the distribution space 25 to the web 5.
  • the distribution space 25 can be formed in a simple manner between this last plate 26 with the connecting gap 24 and the guide plate 27.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

In a liquid-application unit operating according to the refilling principle, the liquid which is to be fed via hoses is to be distributed uniformly over the working width. This took place previously by means of a reservoir space which is advantageously formed from a conically increasing retaining space, out of which the liquid runs onto the material web via an overflow edge and a guide surface. However, it is also essential with this low-volume liquid retaining space that the liquid be supplied uniformly over the working width, in particular when changing colour. In order to achieve this, individual liquid distribution spaces which extend one directly next to the other over the working width are defined in which uniformity is achieved by means of a forced distribution of the liquid from a feed opening to a number of outflow openings. This forced distribution takes place similarly to the structure of a family tree, namely in steps from one opening to two, four, eight, sixteen outflow openings and so on. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Aufbringen eines über die Arbeitsbreite gleichmäßig dünnen, laminar auf eine kontinuierlich vorbewegte Warenbahn fließenden Flüssigkeitsfilmes - vorzugsweise großer Breite - mit einer mit einer von einer Pumpe geförderten Flüssigkeit gespeisten Flüssigkeitsverteileinrichtung mit einem Flüssigkeitsverteilraum und einer zugeordneten, sich anschließenden Leitfläche, von deren unterem Rand der abfließende Flüssigkeitsfilm auf die Warenbahn abläuft, wobei der Flüssigkeitsverteilraum einerseits über eine Zuflußleitung mit einer Pumpe verbunden ist und andererseits zur Leitfläche hin sich über eine Arbeitsbreite erstreckt, die größer als der Querschnitt der Zuflußleitung ausgebildet ist.The invention relates to a device for applying a liquid film which is uniformly thin over the working width, laminarly flowing on a continuously moving web of material - preferably a large width - with a liquid distribution device fed with a liquid conveyed by a pump with a liquid distribution space and an associated, subsequent guide surface , from the lower edge of which the flowing liquid film runs onto the material web, the liquid distribution space being connected to a pump on the one hand via an inflow line and on the other hand extending to the guide surface over a working width which is larger than the cross section of the inflow line.

Eine Vorrichtung dieser Art ist aus der DE-A-35 22 320 bekannt. Sie hat den Vorteil, daß mit dieser Vorrichtung ein schneller Wechsel der Auftragsflüssigkeit nach Art oder Farbe ohne damit bisher verbundenem Produktionsausfall oder Ausschußware der zu netzenden Warenbahn möglich ist, wobei eine gleichmäßige Verteilung und eine konstante Menge der Auftragsflüssigkeit über die Arbeitsbreite gewährleistet ist. Dieses wird durch einen der Leitfläche vorgeschalteten Flüssigkeitsverteilraum bewirkt, der im Volumen gering ist. Auf diese Weise wird die zur Bildung eines laminaren Flüssigkeitsfilmes notwendige Beruhigung des Flüssigkeitszuflußstromes bis hin zur Leitfläche erzielt. Die Beruhigung des Flüssigkeitszuflußstromes ist bei einer solchen Vorrichtung notwendig, weil das Flüssigkeitsvolumen innerhalb dieses Flüssigkeitsverteilraumes nur sehr gering, aber die Flüssigkeitsauftragsmenge über die Arbeitsbreite von mehr als 30 l/min/m Arbeitsbreite sehr groß und damit der Zufluß der Flüssigkeit in diese Vorrichtung verteilt über mehrere Zuflußleitungen sehr stark ist.A device of this type is known from DE-A-35 22 320. It has the advantage that a quick change of the application liquid by type or color is possible with this device without the associated production loss or rejects of the web to be wetted, a uniform distribution and a constant amount of the application liquid being ensured over the working width. This is brought about by a liquid distribution space upstream of the guide surface, which is small in volume. In this way, the calming of the liquid inflow flow down to the guide surface, which is necessary to form a laminar liquid film, is achieved. The calming of the liquid inflow flow is necessary in such a device because the liquid volume within this liquid distribution space is only very small, but the amount of liquid applied over the working width of more than 30 l / min / m working width is very large and thus the inflow of liquid into this device is distributed over multiple inflow lines is very strong.

Die Arbeit mit einer Vorrichtung dieser Art hat gezeigt, daß mit ihr zwar ein schneller Farbwechsel durchaus möglich ist, jedoch beim Übergang zwischen der einen und einer anderen Farbe sich ein wenn auch geringer Bereich auf der Warenbahn ergibt, in dem sich die Farben miteinander vermischen.Working with a device of this type has shown that it is indeed possible to change the color quickly, but the transition between one and another color results in a small area on the web, in which the colors mix with one another.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu entwickeln, mit der bei gleichbleibendem Aufgabengebiet des schnellen Farbwechsels und einem geringen Flüssigkeitsvolumen in einer Auftragsvorrichtung mit dem vorteilhaften Aufgießprinzip jetzt auch ein linienförmiger Farbwechsel möglich gemacht ist und dabei das bisher notwendige Flüsssigkeitsvolumen innerhalb der Vorrichtung noch verringert werden kann.The invention has for its object to develop a device with which the line of color change is now possible with a constant application area of the fast color change and a small liquid volume in an application device with the advantageous pouring principle and thereby still reduces the previously required liquid volume within the device can be.

Ausgehend von der Vorrichtung anfangs genannter Art besteht die Lösung der gestellten Aufgabe darin, daß die Verteilung der Flüssigkeit von der Zuflußleitung bis zu einer Vielzahl von Ausflußöffnungen schrittweise derart vorgesehen ist, daß die Zuflußöffnung beidseitig in Arbeitsbreitenrichtung mit einer gleich langen ersten Verzweigleitung verbunden ist, an deren jeweiligem Ende eine Zwischenausflußöffnung vorgesehen ist, an die sich in gleicher Weise beidseitig in Arbeitsbreitenrichtung eine jedoch um die Hälfte der ersten Verzweigleitung kürzere und im Querschnitt verkleinerte zweite Verzweigleitung anschließt, sich die Flüssigkeitsverteilung in dieser Flüssigkeitsverteileinrichtung also stammbaumähnlich mehrfach verzweigt, und daß somit die fein über die Arbeitsbreite verteilten Ausflußöffnungen in einen sich über die Arbeitsbreite der Warenbahn erstreckenden Verbindungsspalt münden, der in den an die Leitfläche angrenzenden Flüssigkeitsverteilraum mündet.Starting from the device of the type mentioned initially, the solution to the problem is that the distribution of the liquid from the inflow line to a plurality of outflow openings is gradually provided such that the inflow opening is connected on both sides in the working width direction to an equally long first branch line the respective end of which is provided with an intermediate outflow opening, which is followed in the same way by a second branch line, shorter by half of the first branch line and reduced in cross-section, on both sides in the working width direction, so that the liquid distribution in this liquid distribution device branches out several times like a family tree, and so that the fine Outflow openings distributed over the working width open into a connecting gap which extends over the working width of the web and opens into the liquid distribution space adjacent to the guide surface.

Eine Vorrichtung mit einer Verteilung der Flüssigkeit von einer Zuflußleitung bis zu einer Vielzahl von Ausflußöffnungen schrittweise derart, daß die Zuflußöffnung beidseitig in Arbeitsbreitenrichtung mit einer gleich langen ersten Verzweigleitung verbunden ist, an deren jeweiligem Ende eine Zwischenausflußöffnung vorgesehen ist, an die sich in gleicher Weise beidseitig in Arbeitsbreitenrichtung eine jedoch um die Hälfte der ersten Verzweigleitung kürzere und im Querschnitt verkleinerte zweite Verzweigleitung anschließt, sich die Flüssigkeitsverteilung in dieser Flüssigkeitsverteileinrichtung also stammbaumähnlich mehrfach verzweigt, ist durch die US-A-4 550 681 bekannt. In dieser Schrift wird eine Rotations-Siebdruckmaschine abgehandelt. Die dort von dieser Verteilvorrichtung abgegebene Druckpaste wird anschließend durch ein mit Löchern zur Herstellung eines Musters versehenes Sieb gepreßt. Die bei einer Druckmaschine von einer Verteilvorrichtung zu erfüllenden Aufgaben sind insofern sehr unterschiedlich zu denen bei einer Aufgießvorrichtung. Bei dieser ist durch die Verteilvorrichtung ein gleichmäßig über die Arbeitsbreite laminar fließender Film zu erzeugen, der natürlich bei einer Druckmaschine keine Bedeutung hat. Es ist also Ziel der Vorrichtung nach der Erfindung, die Beruhigung und die seitliche Verteilung der durch die Zuflußleitung zufließenden Flüssigkeit in dem begrenzten Flüssigkeitsverteilraum zu bewirken, und zwar derart, daß beim Farbwechsel sich keine Streifen von Mischfarben ergeben. Gleich nach der Verteilung der Flüssigkeit ist durch eine richtige Anbindung der Verteilvorrichtung an die Leitfläche der laminar fließende Film erzeugt. Es ist also der nach der genannten Offenlegungsschrift noch notwendige Beruhigungsraum ggf. nicht mehr notwendig, so daß das in der Auftragsvorrichtung erforderliche Flüssigkeitsvolumen erheblich geringer gehalten werden kann.A device with a distribution of the liquid from an inflow line to a plurality of outflow openings stepwise in such a way that the inflow opening is connected on both sides in the working width direction to an equally long first branch line, at the respective end of which an intermediate outflow opening is provided, which is in the same way on both sides in the working width direction a second branch line, which is however shorter by half the first branch line and reduced in cross-section, is connected, so that the liquid distribution in this liquid distribution device branches out several times like a family tree U.S.-A-4,550,681 is known. A rotary screen printing machine is dealt with in this document. The printing paste released there by this distribution device is then pressed through a screen provided with holes for producing a pattern. In this respect, the tasks to be performed by a distribution device in a printing press are very different from those in a pouring device. In this case, the distribution device is used to produce a film that flows laminarly evenly across the working width, which of course is of no importance in a printing press. It is therefore the aim of the device according to the invention to bring about the calming and the lateral distribution of the liquid flowing in through the inflow line in the limited liquid distribution space, in such a way that there are no streaks of mixed colors when changing colors. Immediately after the distribution of the liquid, the laminar flowing film is produced by a correct connection of the distribution device to the guide surface. It is therefore no longer necessary to have the calming space still required according to the aforementioned publication, so that the volume of liquid required in the application device can be kept considerably lower.

Eine besonders vorteilhafte Art und Weise, wie der Flüssigkeitsverteilraum mit der stammbaumähnlichen Verzweigung der Flüssigkeit von der Zuflußleitung bis zu der Vielzahl der Flüssigkeitsaustrittsöffnungen gestaltet werden kann, besteht darin, daß die sich in Arbeitsbreitenrichtung erstreckenden Verzweigleitungen und die sich am Ende dieser Verzweigleitung anschließenden Zwischenausflußöffnungen als Löcher in entsprechend dünn herzustellenden Blechen eingebracht werden können. Es ist also besonders vorteilhaft, die Flüssigkeitsverteileinrichtung durch eine Vielzahl von solchen Blechen zu bilden und die in diesen Blechen nach einem bestimmten Programm herzustellenden Verzweigleitungen und Löcher derart anzuordnen, daß sich eine gleichmäßige, stammbaumähnliche Verzweigung der Leitungen von der Zuflußleitung bis zu der Vielzahl der Ausflußöffnung, die über den Verbindungsspalt zunächst einem Überlaufwehr oder gleich der Leitfläche zugeordnet sind, ergibt.A particularly advantageous way of designing the liquid distribution space with the branch tree-like branching of the liquid from the inflow line to the multiplicity of liquid outlet openings is that the branch lines extending in the working width direction and the intermediate outflow openings adjoining the end of this branch line are in the form of holes can be introduced into corresponding thin sheets. It is therefore particularly advantageous to form the liquid distribution device by a large number of such sheets and to arrange the branch lines and holes to be produced in these sheets according to a specific program such that there is a uniform, family tree-like branching of the lines from the inflow line to the large number of outflow openings that over the connection gap initially an overflow weir or equal are assigned to the guiding surface.

In der Zeichnung sind zwei Ausführungsbeispiele der Vorrichtung nach der Erfindung dargestellt. Anhand dieser Beispiele soll die Erfindung noch im einzelnen erläutert werden und auch noch auf besondere erfinderische Details hingewiesen werden. Es zeigen:

Figur 1:
im Schnitt das nach dem Aufgießprinzip arbeitende Flüssigkeitsauftraggerät,
Figur 2:
einen Schnitt entlang der Linie II-II in der Figur 1,
Figur 3:
die Draufsicht auf die Flüssigkeitsverteileinrichtung gemäß Figur 2 mit teilweise übereinander gezeichneten Öffnungen innerhalb des Querschnitts dieser Flüssigkeitsverteileinrichtung,
Figur 4:
ein ebenfalls nach dem Aufgießprinzip arbeitendes Farbauftraggerät, bei dem die Flüssigkeitsverteileinrichtung direkt einem Leitblech zugeordnet ist, und
Figur 5:
das Auftraggerät nach Figur 1 mit einem Vorratsraum stets gleichen Querschnitts.
In the drawing, two embodiments of the device according to the invention are shown. On the basis of these examples, the invention is to be explained in more detail and reference is also made to particular inventive details. Show it:
Figure 1:
on average the liquid application device working according to the pouring principle,
Figure 2:
2 shows a section along the line II-II in FIG. 1,
Figure 3:
2 shows the top view of the liquid distribution device according to FIG. 2 with openings drawn partially one above the other within the cross section of this liquid distribution device,
Figure 4:
a paint applicator, also working according to the pouring principle, in which the liquid distribution device is directly assigned to a baffle, and
Figure 5:
the applicator of Figure 1 with a storage room always the same cross section.

Die Flüssigkeitsauftragsvorrichtung gemäß Figur 1 besteht aus einem Träger 1, dessen 90° Ecke nach oben ausgerichtet ist. Der eine Schenkel des Winkelträgers ist die Stauwand 2, die schräg aufwärts in Richtung zum Überlaufwehr 3 ausgerichtet ist. An das Überlaufwehr 3 schließt sich die Leitfläche 4 an, über die der gleichmäßig verteilte Flüssigkeitsfilm abläuft und auf die darunter entlang geführte Warenbahn 5 fließt. Die Warenbahn 5 ist mit nach oben angeordnetem Flor über eine Umlenkrolle 6 getragen. Auf der der Stauwand 2 gegenüberliegenden Seite ist ein massiver Körper 7 angeordnet, dessen der Stauwand 2 zugeordnete Wandung als Diffusorwand 8 dient. Diese Wand 8 kann aber auch parallel zur Stauwand 2 ausgerichtet sein, so daß sich ein Schlitz 9' als Verteilraum bildet. Zwischen der nach oben verlaufenden Diffusorwand 8 und der Stauwand 2 ist der konisch zum Überlaufwehr 3 sich erweiternde Verteilraum 9 gebildet. Der Verteilraum kann aber auch ohne Konus schlitzförmig verlaufen, wie es Figur 4 oder 5 zeigt. Der Körper 7 erstreckt sich mit den übrigen Teilen des Farbauftraggerätes 1 über ein bis sechs Meter Arbeitsbreite und ist über diese Arbeitsbreite nur mit wenigen Zuflußschläuchen 10 versehen, über die die erforderliche Flüssigkeitsmenge mit einer nicht dargestellten Pumpe dem Auftraggerät zufleißt. Die dargestellte Vorrichtung entspricht insofern der Auftragvorrichtung nach der DE-A-35 22 320.The liquid application device according to FIG. 1 consists of a carrier 1, the 90 ° corner of which is oriented upwards. One leg of the angle bracket is the baffle wall 2, which is oriented obliquely upwards in the direction of the overflow weir 3. The guide surface 4 adjoins the overflow weir 3, via which the uniformly distributed liquid film runs off and flows onto the material web 5 that runs along it. The web 5 is carried with the pile arranged upwards over a deflection roller 6. A solid body 7 is arranged on the side opposite the baffle wall 2, the wall of which is associated with the baffle wall 2 serves as a diffuser wall 8. This wall 8 can also be aligned parallel to the baffle wall 2, so that a slot 9 'is formed as a distribution space. Between the upwardly extending diffuser wall 8 and the baffle wall 2, the distribution chamber 9, which widens conically to the overflow weir 3, is formed. The distribution space can also run in the form of a slot without a cone, as shown in FIG. 4 or 5. The body 7 extends with the remaining parts of the paint applicator 1 over a working width of one to six meters and is only provided with a few inflow hoses 10 over this working width, via which the required amount of liquid is fed to the applicator with a pump, not shown. In this respect, the device shown corresponds to the application device according to DE-A-35 22 320.

Wesentlich bei der in Fig. 1 dargestellten Vorrichtung ist das Flüssigkeitsverteilsystem, das in dem Körper 7 angeordnet ist. Der Schlauch 10 ist über ein Mundstück 11 gestülpt, das in dem Körper 7 im Bereich des Bezugszeichens 12 gehalten und mit seinem unteren Ende in die sog. Flüssigkeitsverteileinrichtung 13 eingeschraubt ist. Die Flüssigkeitsverteileinrichtung kann auch senkrecht zur Stauwand 2 und nicht parallel zur Stauwand - wie in Fig. 5 dargestellt - ausgerichtet sein. Diese Flüssigkeitsverteileinrichtung 13 ist im einzelnen in den Figuren 2 und 3 dargestellt. Sie besteht aus einer Vielzahl von Blechen 14, die parallel zueinander angeordnet und nach der Montage aufeinandergepreßt sind. In dem obersten Blech 15 dieser Flüssigkeitsverteileinrichtung 13 ist nur eine Bohrung eingezeichnet, die die Flüssigkeitszuflußöffnung 16 einer in der Arbeitsbreite begrenzten Verzweigleitung 18, 19 gemäß Fig. 2 und 3 bildet. Von jeder der Flüssigkeitszuflußöffnungen 16 erstreckt sich gemäß Figur 2 ein Flüssigkeitsverteilsystem zur unteren Seite der einzelnen Flüssigkeitsverteileinrichtung 13, die sich über eine exakte Arbeitsbreite, die aber nur ein Bruchteil der gesamten Breite des Auftraggerätes ist, erstreckt.What is essential in the device shown in FIG. 1 is the liquid distribution system which is arranged in the body 7. The hose 10 is placed over a mouthpiece 11 which is held in the body 7 in the area of the reference number 12 and is screwed with its lower end into the so-called liquid distribution device 13. The liquid distribution device can also be oriented perpendicular to the baffle wall 2 and not parallel to the baffle wall - as shown in FIG. 5. This liquid distribution device 13 is shown in detail in FIGS. 2 and 3. It consists of a plurality of sheets 14, which are arranged parallel to each other and pressed together after assembly. In the uppermost plate 15 of this liquid distribution device 13, only one hole is drawn, which forms the liquid inflow opening 16 of a branch line 18, 19 of limited working width according to FIGS. 2 and 3. According to FIG. 2, a liquid distribution system extends from each of the liquid inflow openings 16 to the lower side of the individual liquid distribution device 13, which extends over an exact working width, but which is only a fraction of the total width of the application device.

Die Verteilung der durch die Zuflußöffnung 16 zufließenden Flüssigkeit erfolgt in der Flüssigkeitsverteileinrichtung, die durch die einzelnen Bleche 14 ausgefüllt ist. Im dargestellten Ausführungsbeispiel weist diese Verteileinrichtung acht parallel zueinander angeordnete Bleche 14 auf, woraus sich eine Verteilung der durch die Zuflußöffnung 16 zufließenden Flüssigkeit auf insgesamt sechzehn Flüssigkeitsausflußöffnungen 17 ergibt. Dieses ist dadurch bewirkt, daß die Breitenverteilung der Flüssigkeit von Blech zu Blech schrittweise erzwungen wird. Dazu sind beidseitig der Flüssigkeitszuflußöffnung 16 in Arbeitsbreitenrichtung - gemäß Figur 2 sowohl nach rechts als auch nach links - gleich lange erste Verzweigleitungen 18, 19 angeordnet, an deren jeweiligem Ende eine Zwischenausflußöffnung 20, 21 vorgesehen ist. Diese beiden Zwischenausflußöffnungen 20, 21 sind in dem darunter angeordneten Blech 14 gebohrt. An diese beiden Zwischenausflußöffnungen 20, 21 schliessen sich in gleicher Weise wiederum beidseitig in Arbeitsbreitenrichtung die um die Hälfte kürzeren zweiten Verzweigleitungen 22, 23 an, so daß die Flüssigkeitsverteilung sich ähnlich einem Stammbaum oder einem Hirschgeweih mehrfach verzweigt, und zwar exakt gleichmäßig über die Arbeitsbreite. Um nicht zu viele Sehläuche 10 über die gesamte Arbeitsbreite bauen zu müssen, sollten etwa 10 bis 20 der Flüssigkeitsausflußöffnungen 17 bei einem gegenseitigen Abstand von etwa 10 mm zu einer dieser Flüssigkeitsverteileinrichtungen gehören.The distribution of the liquid flowing in through the inflow opening 16 takes place in the liquid distribution device, which is filled by the individual sheets 14. In the exemplary embodiment shown, this distribution device has eight sheets 14 arranged parallel to one another, which results in a distribution of the liquid flowing in through the inflow opening 16 over a total of sixteen liquid outflow openings 17. This is achieved in that the distribution of the liquid width from sheet to sheet is gradually forced. For this purpose, first branch lines 18, 19 of equal length are arranged on both sides of the liquid inflow opening 16 in the working width direction - according to FIG. 2 both to the right and to the left - an intermediate outflow opening 20, 21 is provided at the respective end of the latter. These two intermediate outflow openings 20, 21 are drilled in the sheet 14 arranged underneath. These two intermediate outflow openings 20, 21 are connected in the same way, in turn, on both sides in the working width direction by half the second branch lines 22, 23, so that the liquid distribution is similar to a family tree or a deer antler branched several times, exactly evenly across the working width. In order not to have to build too many suction hoses 10 over the entire working width, approximately 10 to 20 of the liquid outflow openings 17 should belong to one of these liquid distribution devices at a mutual distance of approximately 10 mm.

Da die in der Flüssigkeitszuflußöffnung 16 zufließende Flüssigkeit über eine Vielzahl von Flüssigkeitsausflußöffnungen 17 verteilt werden muß, sind die Querschnitte von dieser Flüssigkeitszuflußöffnung 16 bis zu den Flüssigkeitsausflußöffnungen 17 schrittweise zu verkleinern. Dies ist in Figur 3 dargestellt. Der Querschnitt der der Flüssigkeitszuflußöffnung 16 folgenden Zwischenausflußöffnung 20, 21 ist halbiert dementsprechend sind auch die jeweils zugeordneten ersten Verzweigleitungen 22, 23 schmaler im Querschnitt ausgebildet als die vorhergehende erste Verzweigleitung 18 oder 19.Since the liquid flowing into the liquid inflow opening 16 must be distributed over a multiplicity of liquid outflow openings 17, the cross sections from this liquid inflow opening 16 to the liquid outflow openings 17 must be gradually reduced. This is shown in Figure 3. The cross section of the intermediate outflow opening 20, 21 following the liquid inflow opening 16 is halved. Accordingly, the respectively assigned first branch lines 22, 23 are also narrower in cross section than the previous first branch line 18 or 19.

Es wurde oben ausgeführt, daß die Flüssigkeitsverteileinrichtung aus mehreren, parallel zueinander angeordneten Blechen 14 gebildet ist, die jeweils entweder eine Zwischenausflußöffnung 20, 21, oder eine Verzweigleitung 18, 19, 22, 23 aufweisen. Zur Bildung dieser stammbaumähnlichen Verzweigung der Flüssigkeit sind in den einzelnen Blechen die Bohrungen 20, 21 und als Langlöcher die Verzweigleitungen 18, 19, 22, 23 an solchen Stellen eingebracht, daß sich diese stammbaumähnliche Verzweigung gemäß Figur 2 nach der Montage ergibt.It was stated above that the liquid distribution device is formed from a plurality of sheets 14 arranged parallel to one another, each of which has either an intermediate outflow opening 20, 21 or a branch line 18, 19, 22, 23. To form this pedigree-like branching of the liquid, the bores 20, 21 and, as elongated holes, the branch lines 18, 19, 22, 23 are introduced into the individual sheets at such points that this pedigree-like branching according to FIG. 2 results after assembly.

Die Aufteilung der gesamten Arbeitsbreite von 1 bis 5 m in solche Bereiche, die einer in Fig. 2 dargestellten Flüssigkeitsverteileinrichtung entspricht, hat den Vorteil, daß die durch die Schläuche 10 zugeführte Flüssigkeit exakt gleichmäßig auf eine große Arbeitsbreite verteilt werden kann. Je nach Arbeitsbreite der Warenbahn 5 ist es dann auch möglich, durch Abschaltung einzelner Zufuhrschläuche 10 die wirksame Arbeitsbreite der Farbauftragsvorrichtung zu definieren. Der wesentlichere Vorteil, die zwangsmäßig gleichmäßige Verteilung der Flüssigkeit über die Arbeitsbreite zu erzielen, ist jedoch ohne einen über die Arbeitsbreite sich erstreckenden gemeinsamen größeren Vorratsraum auskommen zu können. Die aus den Flüssigkeitsausflußöffnungen 17 schon jetzt gleichmäßig austretende Flüssigkeit staut sich nur noch in dem sich anschließenden Verbindungsspalt 24, der sich jetzt über die gesamte Arbeitsbreite der Warenbahn erstreckt. Ein Staudruck ergibt sich dort deshalb, weil sich an diesen Verbindungsspalt 24 ein ebenfalls über die Arbeitsbreite sich erstreckender Flüssigkeitsverteilraum 25 anschließt, dessen Durchströmhöhe kleiner ist als die Tiefe des Verbindungsspaltes 24.The division of the entire working width from 1 to 5 m into such areas, which corresponds to a liquid distribution device shown in FIG. 2, has the advantage that the liquid supplied through the hoses 10 can be distributed exactly evenly over a large working width. Depending on the working width of the web 5, it is then also possible to define the effective working width of the ink application device by switching off individual supply hoses 10. The more important advantage of achieving the compulsorily uniform distribution of the liquid over the working width, however, is without being able to manage a common larger storage space which extends over the working width. Those from the liquid outlets 17 Evenly emerging liquid only accumulates in the connecting gap 24 which now extends over the entire working width of the web. A dynamic pressure arises there because this connecting gap 24 is followed by a liquid distribution space 25, which also extends over the working width and whose flow height is smaller than the depth of the connecting gap 24.

Aus dem Flüssigkeitsverteilraum 25 kommt die Flüssigkeit gleichmäßig über die Arbeitsbreite verteilt aus der Flüssigkeitsverteileinrichtung 13. Dadurch ist der in der Figur 1 dargestellte größere Flüssigkeitsverteilraum 9 nur noch bedingt notwendig. Zur Verdeutlichung dieses Vorteiles verweisen wir auf die Figur 4. Dort ist der Flüssigkeitsverteileinrichtung 13 lediglich noch eine Leitfläche in Gestalt eines Leitbleches 27 zugeordnet, über die die durch die Flüssigkeitsverteileinrichtung 13 gleichmäßig über die Arbeitsbreite verteilte Flüssigkeit nach Durchströmung des Verteilraumes 25 zur Warenbahn 5 abläuft. In einfacher Weise ist der Verteilraum 25 zwischen diesem letzten Blech 26 mit dem Verbindungsspalt 24 und dem Leitblech 27 zu bilden. Es entfällt bei dieser Ausführungsform also nicht nur der massive Körper 7 mit dem größeren Flüssigkeitsverteilraum 9, sondern auch die Überlaufkante 3 zusammen mit der Stauwand 2, vielmehr ist nur noch das Leitblech 27 zum Ablauf der gleichmäßig verteilten Flüssigkeit auf die Warenbahn 5 erforderlich. Dadurch vermindert sich das in der Verteileinrichtung 13, besser sogar in der Auftragsvorrichtung insgesamt, stets eingefüllte Flüssigkeitsvolumen erheblich, was den gewünschten schnellen Farbwechsel mit scharfer Farbwechsellinie ermöglicht.From the liquid distribution chamber 25, the liquid comes from the liquid distribution device 13, distributed uniformly over the working width. As a result, the larger liquid distribution chamber 9 shown in FIG. 1 is only necessary to a limited extent. To clarify this advantage, we refer to FIG. 4. There, the liquid distribution device 13 is only assigned a guide surface in the form of a guide plate 27, through which the liquid distributed evenly over the working width by the liquid distribution device 13 flows after flowing through the distribution space 25 to the web 5. The distribution space 25 can be formed in a simple manner between this last plate 26 with the connecting gap 24 and the guide plate 27. In this embodiment, not only the solid body 7 with the larger liquid distribution space 9 is omitted, but also the overflow edge 3 together with the baffle wall 2, rather only the baffle plate 27 is required to drain the evenly distributed liquid onto the web 5. As a result, the volume of liquid always filled in the distribution device 13, better even in the application device as a whole, is considerably reduced, which enables the desired rapid color change with a sharp color change line.

Claims (8)

  1. Device for applying a film of liquid, preferably of a large width, which is uniformly thin over the working width, flowing in a laminar fashion on to a continuously-advanced textile web (5), with a liquid distributor device (13) with a liquid distribution chamber (9, 25) fed with a liquid supplied by a pump, and with an associated subsequent guide surface (4, 27), from whose lower edge the outflowing film of liquid flows on to the textile web (5), the liquid distribution chamber (9, 25) on the one hand being connected by a feed pipe (11) to a pump, and on the other hand extending towards the guide surface (4, 27) over a working width which is greater than the cross-section of the feed pipe (11), characterised in that distribution from the feed pipe (11) to a plurality of outlet openings (17) is provided stepwise, in such a way that the feed opening (16) is connected on both sides in the direction of the working width with a first branch pipe (18, 19) which is of equal length, at the respective ends of which there is provided an intermediate outlet opening (20, 21), to which there is connected in the same way on both sides in the direction of the working width a second branch pipe (22, 23) which is however shorter than half the length of the first branch pipe(18, 19), and reduced in cross-section, the distribution of liquid in this liquid distribution device (13) thus being branched in a multiple manner in the fashion of a family tree, and that thus the outlet openings (17) finely distributed over the working width open into a connection slot (24) extending over the working width of the textile web (5), which opens into the liquid distribution chamber (9, 25) adjacent to the guide surface (4, 27).
  2. Device according to Claim 1, characterised in that a plurality of these liquid distribution devices (13) are disposed directly next to one another, and thus the connector slot (24) of the outlet opening (17) is also that of the number of liquid distribution devices (13), and these cover the entire working width of the textile web.
  3. Device according to Claim 1 or 2, characterised in that the connector slot (24) is larger in cross-section than the cross-section of the associated outlet opening (17).
  4. Device according to Claims 1 or 3, characterised in that there is connected to the connector slot (24) a liquid outlet slot (25), likewise extending over the working width, whose height is less than the depth of the connector slot (24).
  5. Device according to one of Claims 1 - 4, characterised in that the branch pipes (18, 19) and the bores in the intermediate outlet openings (20, 21) are each formed as holes in a sheet metal plate (14), three of each of which are pressed together to form a branch pipe (18,19; 20,21).
  6. Device according to one of the preceding Claims, characterised in that the liquid distribution device (13) precedes a liquid storage chamber (9) with spillover weir (3).
  7. Device according to one of the preceding Claims 1 - 5, characterised in that the liquid distribution device (13) is directly associated with the guide plate (27).
  8. Device according to Claim 7, characterised in that the liquid distribution chamber (25) is formed between this guide plate (27) and the last plate (26) of the liquid distribution device (13).
EP91113234A 1990-08-18 1991-08-07 Apparatus for applying a liquid-film to a material web Expired - Lifetime EP0472050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4026198 1990-08-18
DE4026198A DE4026198A1 (en) 1990-08-18 1990-08-18 DEVICE FOR APPLYING A LIQUID FILM TO A RAILWAY

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EP0472050A2 EP0472050A2 (en) 1992-02-26
EP0472050A3 EP0472050A3 (en) 1992-05-13
EP0472050B1 true EP0472050B1 (en) 1995-09-27

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EP (1) EP0472050B1 (en)
AT (1) ATE128384T1 (en)
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Publication number Publication date
DE59106579D1 (en) 1995-11-02
EP0472050A3 (en) 1992-05-13
ATE128384T1 (en) 1995-10-15
EP0472050A2 (en) 1992-02-26
DE4026198A1 (en) 1992-02-27
US5243841A (en) 1993-09-14

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