EP3381571B1 - Slit nozzle - Google Patents

Slit nozzle Download PDF

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Publication number
EP3381571B1
EP3381571B1 EP17163097.3A EP17163097A EP3381571B1 EP 3381571 B1 EP3381571 B1 EP 3381571B1 EP 17163097 A EP17163097 A EP 17163097A EP 3381571 B1 EP3381571 B1 EP 3381571B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
slot
outlet opening
adhesive
region
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.)
Active
Application number
EP17163097.3A
Other languages
German (de)
French (fr)
Other versions
EP3381571A1 (en
Inventor
Roman Kappeler
Mathias Heller
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.)
Robatech AG
Original Assignee
Robatech AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robatech AG filed Critical Robatech AG
Priority to EP17163097.3A priority Critical patent/EP3381571B1/en
Priority to US15/934,670 priority patent/US10549309B2/en
Publication of EP3381571A1 publication Critical patent/EP3381571A1/en
Application granted granted Critical
Publication of EP3381571B1 publication Critical patent/EP3381571B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus 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
    • B05C5/0204Apparatus 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 for applying liquid or other fluent material to the edges of essentially flat articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus 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
    • B05C5/0254Coating heads with slot-shaped outlet
    • B05C5/0262Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02Apparatus 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
    • B05C11/08Spreading liquid or other fluent material by manipulating the work, e.g. tilting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039Recovery of excess liquid or other fluent material; Controlling means therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus 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
    • B05C5/0254Coating heads with slot-shaped outlet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus 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
    • B05C5/0254Coating heads with slot-shaped outlet
    • B05C5/0266Coating heads with slot-shaped outlet adjustable in length, e.g. for coating webs of different width
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials
    • B05D1/32Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B05D1/322Removable films used as masks
    • B05D1/325Masking layer made of peelable film

Definitions

  • the invention relates to a slot nozzle for dispensing a liquid adhesive, in particular for applying adhesive to a narrow edge of a substrate for the purpose of bonding with an edge band.
  • Sheets of wood or wood-containing material are used today in a wide variety of applications. To make the panels look beautiful and adaptable to the requirements of use, they are often pasted over the narrow edges with a flexible edge band and over the large areas with flexible cover plates or bands. For example, furniture for the kitchen or the bathroom are very often made from such panels.
  • Edge banding machines are available for the production of such boards. There are machines that are able to provide the large area of the panels with cover plates or shrouds and there are machines designed to provide only the narrow edges with the edge band. There are also known machines that can carry out both processes.
  • an apparatus for applying adhesive to a substrate comprising an applicator roll rotatable about an axis, means for dispensing adhesive to a peripheral surface of the applicator roll, a dispensing portion of the applicator roll for dispensing adhesive from the applicator roll to the substrate, and with a doctor blade, wherein the adhesive delivery portion is arranged in the direction of rotation of the applicator roll behind the means for dispensing the adhesive to the applicator roll and before the doctor blade.
  • This device for dispensing adhesive onto the peripheral surface of the applicator roll is a slot die. Adhesive is applied with the slot nozzle in a width on the applicator roll, which corresponds to the substrate thickness.
  • the length of adhesive application on the applicator roll corresponds to the length of the substrate multiplied by a translation factor.
  • the adhesive application on the substrate starts with an increase in the adhesive film thickness and ends with a decrease in the adhesive film thickness towards the substrate thickness end.
  • the edge band is applied against the adhesive substrate, there is less adhesive in the area of the rise and fall and a visible gap is created between the edge band and the substrate. This is not allowed for a nice appearance of the coated substrate.
  • adhesive breaks adheresive holes between the edge band and the substrate may also be visible. The adhesive breaks are then, when the substrate is additionally painted, more visible and through these adhesive breaks, water can penetrate into the substrate.
  • the adhesive application on the first substrate is incomplete after the system is restarted. This is done for the reason that the liquid adhesive in the vertically oriented slot nozzle by gravity slowly runs down and exits at a longer standstill of the system from the outlet opening in the slot.
  • the leaked adhesive is replaced in the upper part of the outlet by an air cushion of the same volume.
  • the volume of the leaked adhesive is, in addition to the time, primarily dependent on the viscosity and the geometry of the slot-shaped outlet opening of the slot nozzle. If the edge banding machine is restarted after a long period of inactivity, the first glue application from the slot die to the applicator roll in the upper area is missing glue and the adhesive application at the beginning of the substrate is not complete.
  • the controller of the device has information about when substrate is being supplied. If a production interruption occurs and no substrate is supplied, the controller starts an adjustable counter. If the meter has expired and no substrate has been supplied, the controller activates the glue flow through the slot nozzle for a short time as soon as it detects that substrate is being returned. This happens before the substrate comes into contact with the applicator roll for gluing. As a result, the part filled with air in the slot nozzle is replaced with adhesive and some adhesive is applied to the applicator roll. This adhesive is stripped and disposed of by the squeegee because it does not come into contact with the substrate.
  • Length of the nozzle can be adjusted according to the book thickness of the book spine to be bonded.
  • the slot nozzle has an outlet opening and below this opening is located at a distance a parallel first hole.
  • a first bore In this first bore is a piston rod to which a flag is attached, which engages in the slot of the nozzle, movable in the direction of the first bore. It forms the adjustable end of the slot length at the slot nozzle by the flag and the piston seal against the adhesive.
  • the adhesive which is supplied through a second bore which opens into the first bore at the opposite side of the piston rod, flows from the slot nozzle over the free bore length of the first bore and through the free slot when the adhesive flow through the slot nozzle is activated .
  • a slot nozzle can also be used on the device for gluing the narrow edge of a substrate to an edge banding machine. In this case, however, occur the disadvantages described above.
  • the slot nozzle has a nozzle body, a nozzle slot formed in the nozzle body, a passage in the nozzle body for supplying the adhesive to the nozzle slot and a slot-shaped outlet opening of the nozzle slot.
  • a slot nozzle is known, which is used in a coating device for applying a liquid or pasty medium on a moving material web, in particular a material web of paper or cardboard.
  • the slot nozzle is designed such that the cleanest possible application edge is achieved.
  • a slot nozzle is known, which is designed such that the means of the slot nozzle applied to a substrate layer has a uniform layer thickness along a longitudinal extent of the slot nozzle.
  • the object of the present invention is to develop a slot die having the features of the preamble of patent claims 1 and 2 such that an adhesive application can be achieved by means of the slot die, in particular after attachment and pressing of the component to be joined to the substrate Edge band, between this and the substrate has a nearly rectangular cross-sectional shape, seen perpendicular to the longitudinal extent of the component or edge band, has.
  • a slot nozzle which is formed according to the features of claim 1 or 2.
  • the nozzle body is designed in the region of opposite ends of the nozzle slot, wherein these ends are related to the longitudinal extent of the nozzle slot, such that an increased outlet of the adhesive occurs in the region of the opposite ends of the nozzle slot through the outlet opening.
  • Adhesive coating on the substrate is still effected in the slot die according to the invention, viewed over a line in the direction of the thickness of the substrate, which starts with an increase to the adhesive film thickness and ends with a decrease in the adhesive film thickness towards the substrate end.
  • the rising area is made with a slightly excessive adhesive film thickness, and the decrease of the adhesive film thickness starts from a slightly increased thickness of the adhesive film.
  • the adhesive is applied at the normal adhesive film thickness.
  • the slot nozzle is usually designed such that the nozzle body forms end edges in the region of the opposite ends of the nozzle slot. These end edges thus limit the nozzle slot, in the region of opposite ends, with respect to the adhesive located in the nozzle slot.
  • the nozzle body in the region of the opposite ends of the nozzle slot is also designed in such a way that the flow cross-section of the nozzle body continuously reduces towards the outlet opening.
  • the two end edges in particular each have a shape that is not perpendicular to the outlet opening.
  • it may be an arched shape or a straight shape.
  • the two end edges can have an identical, mirror-inverted shape.
  • the outlet opening in the region of the opposite ends of the nozzle slot has a greater width extension than in the remaining region of the outlet opening, which has a constant width. Since the passage cross section for adhesive through the outlet opening of the Nozzle slot in the region of the opposite ends of the nozzle slot is larger than in the region of the outlet opening, which is located between these opposite ends of the nozzle slot, can also be accomplished, the increased application of the adhesive to the substrate.
  • the nozzle body in particular in the region of the two end edges, in the areas of the outlet opening adjacent to these end edges, each have a broadening of the outlet opening, with an otherwise constant width of the outlet opening. Based on the width extension of the outlet opening, this broadening can be provided in the region of the respective terminal edge only on one side of the outlet opening or on the two opposite sides of the outlet opening.
  • the nozzle body is tapered in the region of one of the opposite ends of the nozzle slot to the outlet opening and the outlet opening has a greater width in the region of the other end of the opposite ends of the nozzle slot with respect to the otherwise constant width having outlet opening.
  • one of the two end edges has an arcuate shape and the nozzle body in the region of the other end edge, in which this end edge adjacent region of the outlet opening, a widening of the outlet opening, with otherwise constant width of the outlet opening.
  • the slot nozzle is designed such that the length of the nozzle slot and the outlet opening is adjustable.
  • the length of the nozzle slot and the outlet opening is adjustable by a nozzle body slidably disposed in the nozzle slot passing through the adjusting part.
  • the adjustable slot nozzle is designed such that a displaceably mounted in the nozzle member and adjustable rod in the region of a free end receives the control part.
  • This control part is designed in particular as a plate-shaped flag.
  • the one end edge is integrated in the control part.
  • the actuating part has on its side facing the medium receiving portion of the nozzle slot on the one end edge.
  • the nozzle body can certainly be designed in one piece.
  • the nozzle body has a one-part or multi-part main body and an actuating part.
  • the length of the nozzle slot and the outlet opening is adjustable by the displaceably mounted in the base body, the nozzle slot passing through the adjusting part.
  • the slit nozzle may be particularly used in an apparatus for applying adhesive to a substrate having an applicator roll rotatable about an axis, the slit die serving to apply adhesive to a peripheral surface of the applicator roll, further comprising a dispensing portion of the applicator roll for dispensing adhesive from the applicator roll on the substrate, and with a doctor blade, wherein the delivery area for adhesive in the direction of rotation of the applicator roll is arranged behind the slot nozzle for dispensing the adhesive on the applicator roll and before the doctor blade, and in which the slot nozzle is capable, in the direction of Adhesive application width (axial direction of the applicator roll) to realize an adhesive application on the applicator roll, which starts with an overburden and ends with an overburden.
  • the slot nozzle 1 is used for dispensing liquid adhesive.
  • the slot nozzle 1 has a nozzle body 2, a nozzle slot 3 formed in the nozzle body 2, a passage 4 in the nozzle body 2 for supplying the adhesive to the nozzle slot 3 and a slot-shaped outlet opening 5 of the nozzle slot 3.
  • Farther ends of the nozzle slot 3 are indicated by the reference numerals 6 and 7.
  • the length of the nozzle slot 3 and the length of the outlet opening 5 is characterized by the dimension l, the width in each case by the dimension b.
  • the length l of the nozzle slot is adjustable. Through the nozzle slot 3 and the outlet opening 5 adhesive can escape from the slot 1.
  • the outlet opening 5 is rectangular. By adjusting the slot 1, the length extension of the nozzle slot 3 and outlet opening 5 can be changed, with unchanged width extension of the nozzle slot 3 and outlet opening. 5
  • a first nozzle part 8 and a second nozzle part 9 of the nozzle body 2 are held together by a fastening body 10 by means of adjusting screws 11.
  • a bore 12 is attached.
  • a piston rod 13 with a flag 14 attached thereto, which projects into the nozzle slot 3 between the bore 12 and the outlet opening 5.
  • a piston seal 15 which separates the adhesive-filled space of the bore 12 and the nozzle slot 3 from the non-adhesive fillable space of the bore 12 and the nozzle slot 3.
  • adhesive By formed as a further bore passage 4 adhesive can be conveyed into the bore 12 and the nozzle slot 3, which can then emerge at the outlet opening 5 of the slot 1.
  • the length of the Nozzle slot 3 and the outlet opening 5 is changed by a displacement of the piston rod 13 with the flag 14 in the direction of the longitudinal extent of the bore 12.
  • an adhesive application 16 can be produced on an edge of the substrate 17 as described in US Pat Fig. 4 is shown.
  • the increase 18 and drop 19 of the adhesive application 16 at the edges of the substrate 17 is clearly visible. If the edge band 20 is attached, then the pressing pressure on the edge band 20 can not deform the adhesive application and a disturbing, visible gap arises at the two substrate edges, as shown in FIG Fig. 5 is illustrated.
  • a slot nozzle 1 is presented, with which it is possible to slightly increase the adhesive application 16 on the substrate 17 at the rise 18 and the waste 19, as shown in the Fig. 6 is shown. If the edge band 20 is applied and pressed, the increase in adhesive deforms at the rise 18 and the drop 19 of the adhesive application 16 and fills the rise and the waste area with adhesive. This is in Fig. 7 shown. The disturbing, visible gap is no longer present.
  • the deformation of the adhesive application is possible in this embodiment, because the adhesive increase is only partially applied and the entire pressing force acts on the two adhesive peaks when pressing the edge band. As the adhesive is incompressible, the adhesive shifts towards the corners of the adhesive application.
  • the Fig. 8 and 9 illustrate an embodiment of a slot nozzle 1, which is not covered by the scope of the claims.
  • the representation corresponds to the Fig. 9 that of the Fig. 3 .
  • the nozzle body 2 according to the invention differs from that of the prior art only by the special design of the flag 14 in the area of the Nozzle slot 3 facing the front edge, the end edge 21, and the opposite of this, thus arranged on the other side of the nozzle slot 3 front edge, the end edge 22, which are formed by the two nozzle parts 8, 9.
  • the passage 4 and the bore 12 the piston rod 13 with the flag 14 and the outlet opening 5 with the length l is visible.
  • the pointing towards the nozzle slot 3 and the outlet opening 5 end of the flag 14, thus the end edge 21, has an arc shape.
  • the end edge 22, which is incorporated in the first and second nozzle part 8, 9 and the flag 14 facing the arc shape, also has an arcuate shape which is formed in mirror image to the arc shape of the end edge 21.
  • the adhesive passes through the passage 4 in the bore 12 and flows from there through between the end edges 21, 22 limited nozzle slot 3 against the outlet opening 5 with the length l.
  • the flag 14 is formed with the end edge 21 according to the previous embodiment, thus has the arc shape.
  • the other end edge 22 is modified. It has no arch shape in the sense of the arch shape of the terminal edge 21, but it has the outlet opening 5 in the region of the end 7 with respect to the otherwise constant width b of the outlet opening a slightly larger width b1.
  • an increased discharge of the adhesive through the outlet opening 5 can also take place in the area of this end 7.
  • the slot nozzle 1 is the end edge 23 for the adhesive-flowable nozzle slot 3, which is incorporated in the first and / or the second nozzle part 8, 9, and the flag 14 faces, a straight groove 23 with an extension s against the nozzle slot 3, so that the larger width b1 of the outlet opening 5 results.
  • This groove 23 may extend over the entire length of the end edge 22. In principle, however, it is sufficient if the groove 23 is arranged in the region of the terminal edge 22 adjacent to the outlet opening 5. The depth of the groove 23 is small and has only a few percent of the width b of the nozzle slot 3 and outlet opening 5, which corresponds approximately to the thickness of the flag 14.
  • the straight groove 23 need not, as shown, be arranged at right angles to the bore 12, but may also be carried out inclined to the nozzle slot 3 or the outlet opening 5.
  • a slot nozzle 1 which has a flag 14 in arcuate shape and such a groove 23, which limit the slot of the outlet opening 5 with the length l, also the increased adhesive discharge at the ends 6, 7 of the outlet opening 5 can be achieved.
  • the effect described above can also be realized with this solution.
  • the slot 1 is not adjustable and therefore no movable flag 14 is required, the
  • Nozzle body be designed so that it then has a groove in the region of the terminal edge 21 of the nozzle body 2, which is formed corresponding to the groove 23.

Landscapes

  • Coating Apparatus (AREA)

Description

Die Erfindung betrifft eine Schlitzdüse zum Ausgeben eines flüssigen Klebstoffs, insbesondere zum Auftragen von Klebstoff auf eine schmale Kante eines Substrats zwecks Verkleben mit einem Kantenband.The invention relates to a slot nozzle for dispensing a liquid adhesive, in particular for applying adhesive to a narrow edge of a substrate for the purpose of bonding with an edge band.

Technisches GebietTechnical area

Platten aus Holz oder auch holzhaltigem Material werden heute in den verschiedensten Anwendungen eingesetzt. Damit die Platten schön aussehen und an die Anforderungen der Verwendung anpassbar sind, werden sie oft an den schmalen Kanten mit einem flexiblen Kantenband und an den großen Flächen mit flexiblen Deckplatten oder -bändern überklebt. Beispielsweise werden Möbel für die Küche oder das Bad sehr häufig aus derartigen Platten gefertigt.Sheets of wood or wood-containing material are used today in a wide variety of applications. To make the panels look beautiful and adaptable to the requirements of use, they are often pasted over the narrow edges with a flexible edge band and over the large areas with flexible cover plates or bands. For example, furniture for the kitchen or the bathroom are very often made from such panels.

Für die Herstellung derartiger Platten sind Kantenleimmaschinen verfügbar. Es gibt Maschinen, die in der Lage sind, die große Fläche der Platten mit Deckplatten oder Deckbändern zu versehen und es gibt Maschinen, die dafür vorgesehen sind, nur die schmalen Kanten mit dem Kantenband zu versehen. Es sind auch Maschinen bekannt, die beide Prozesse ausführen können.Edge banding machines are available for the production of such boards. There are machines that are able to provide the large area of the panels with cover plates or shrouds and there are machines designed to provide only the narrow edges with the edge band. There are also known machines that can carry out both processes.

Stand der TechnikState of the art

Aus der Praxis ist eine Vorrichtung zum Auftragen von Klebstoff auf ein Substrat bekannt, mit einer um eine Achse drehbaren Auftragswalze, einer Einrichtung zum Ausgeben von Klebstoff auf eine Umfangsfläche der Auftragswalze, einem Abgabebereich der Auftragswalze zum Abgeben von Klebstoff von der Auftragswalze auf das Substrat, und mit einer Abstreifrakel, wobei der Abgabebereich für Klebstoff in Drehrichtung der Auftragswalze hinter der Einrichtung zum Ausgeben des Klebstoffs auf die Auftragswalze und vor der Abstreifrakel angeordnet ist.In practice, an apparatus for applying adhesive to a substrate is known, comprising an applicator roll rotatable about an axis, means for dispensing adhesive to a peripheral surface of the applicator roll, a dispensing portion of the applicator roll for dispensing adhesive from the applicator roll to the substrate, and with a doctor blade, wherein the adhesive delivery portion is arranged in the direction of rotation of the applicator roll behind the means for dispensing the adhesive to the applicator roll and before the doctor blade.

Bei dieser Einrichtung zum Ausgeben von Klebstoff auf die Umfangsfläche der Auftragswalze handelt es sich um eine Schlitzdüse. Klebstoff wird mit der Schlitzdüse in einer Breite auf die Auftragswalze aufgetragen, die der Substratdicke entspricht. Die Länge des Klebstoffauftrags auf der Auftragswalze (Umfangslänge) entspricht der Länge des Substrats multipliziert mit einem Übersetzungsfaktor. Mit dieser Vorrichtung ist es möglich, nur so viel Klebstoff auf die Auftragswalze abzulegen, wie für das vollständige Beleimen der schmalen Kante des Substrats nötig ist. Dabei wird der Klebstoff nahezu vollständig von der Auftragswalze auf das Substrat übertragen und es entsteht nur sehr wenig Restklebstoff, der mit der Rakel von der Auftragswalze entfernt werden muss.This device for dispensing adhesive onto the peripheral surface of the applicator roll is a slot die. Adhesive is applied with the slot nozzle in a width on the applicator roll, which corresponds to the substrate thickness. The length of adhesive application on the applicator roll (circumferential length) corresponds to the length of the substrate multiplied by a translation factor. With this device, it is possible to deposit only as much adhesive on the applicator roll as is necessary for the complete gluing of the narrow edge of the substrate. In this case, the adhesive is transferred almost completely from the applicator roll to the substrate and there is very little residual adhesive that must be removed with the doctor blade from the applicator roll.

Bei einer solchen Einrichtung startet der Klebstoffauftrag auf dem Substrat, über eine Linie in Richtung der Dicke des Substrats betrachtet, mit einem Anstieg auf die Klebstofffilmdicke und endet mit einem Abfall der Klebstofffilmdicke gegen das Substratdickenende. Wird das Kantenband gegen das mit Klebstoff versehene Substrat angelegt, so ist im Bereich des Anstiegs und des Abfalls weniger Klebstoff vorhanden und es entsteht ein sichtbarer Spalt zwischen Kantenband und Substrat. Dies ist für ein schönes Aussehen des beschichteten Substrats nicht zulässig. Anstelle oder zusätzlich des Spalts können auch Klebstoffunterbrüche (Klebstofflöcher) zwischen Kantenband und Substrat sichtbar sein. Die Klebstoffunterbrüche werden dann, wenn das Substrat zusätzlich lackiert wird, stärker sichtbar und durch diese Klebstoffunterbrüche kann Wasser in das Substrat eindringen. Diese negativen Effekte können durch einen Klebstoffauftrag auf die Auftragswalze, der leicht breiter ist als die Dicke des Substrats, nahezu beseitigt werden. Dies hat aber den Nachteil, dass mehr Klebstoff mit der Rakel abgetragen und entsorgt werden muss. Dadurch steigt der Klebestoffverbrauch. Dies bringt höhere Produktionskosten und mehr zu entsorgendes Material mit sich.In such a device, the adhesive application on the substrate, viewed over a line in the direction of the thickness of the substrate, starts with an increase in the adhesive film thickness and ends with a decrease in the adhesive film thickness towards the substrate thickness end. When the edge band is applied against the adhesive substrate, there is less adhesive in the area of the rise and fall and a visible gap is created between the edge band and the substrate. This is not allowed for a nice appearance of the coated substrate. Instead of or in addition to the gap, adhesive breaks (adhesive holes) between the edge band and the substrate may also be visible. The adhesive breaks are then, when the substrate is additionally painted, more visible and through these adhesive breaks, water can penetrate into the substrate. These negative effects can be caused by a glue application on the applicator roll, which is slightly wider is as the thickness of the substrate, almost eliminated. But this has the disadvantage that more adhesive must be removed and disposed of with the doctor. This increases the adhesive consumption. This entails higher production costs and more material to be disposed of.

Bei der Vorrichtung ist bei einem längeren Stillstand der Kantenleimmaschine der Klebestoffauftrag auf dem ersten Substrat nach dem Wiederstart der Anlage unvollständig. Dies geschieht aus dem Grunde, dass der flüssige Klebstoff in der vertikal orientierten Schlitzdüse durch die Gravitation langsam nach unten läuft und bei längerem Stillstand der Anlage aus der Austrittsöffnung in der Schlitzdüse austritt. Der ausgelaufene Klebstoff wir im oberen Bereich der Austrittsöffnung durch ein Luftpolster gleichen Volumens ersetzt. Das Volumen des ausgelaufenen Klebstoffs ist, neben der Zeit, primär abhängig von der Viskosität und der Geometrie der schlitzförmigen Austrittsöffnung der Schlitzdüse. Wird nun nach längerer Stillstandszeit die Kantenleimmaschine wieder gestartet, fehlt beim ersten Klebstoffauftrag aus der Schlitzdüse auf die Auftragswalze im oberen Bereich Klebstoff und der Klebstoffauftrag am Anfang des Substrats ist nicht vollständig.In the case of a longer standstill of the edge banding machine, the adhesive application on the first substrate is incomplete after the system is restarted. This is done for the reason that the liquid adhesive in the vertically oriented slot nozzle by gravity slowly runs down and exits at a longer standstill of the system from the outlet opening in the slot. The leaked adhesive is replaced in the upper part of the outlet by an air cushion of the same volume. The volume of the leaked adhesive is, in addition to the time, primarily dependent on the viscosity and the geometry of the slot-shaped outlet opening of the slot nozzle. If the edge banding machine is restarted after a long period of inactivity, the first glue application from the slot die to the applicator roll in the upper area is missing glue and the adhesive application at the beginning of the substrate is not complete.

Der letztgenannte Nachteil wird bei der aus der Praxis bekannten Vorrichtung durch deren Steuerung beseitigt. Die Steuerung der Vorrichtung hat Information darüber, wann Substrat zugeführt wird. Entsteht ein Produktionsunterbruch und wird kein Substrat zugeführt, so startet die Steuerung einen einstellbaren Zähler. Ist der Zähler abgelaufen und es wurde kein Substrat zugeführt, so aktiviert die Steuerung den Leimfluss durch die Schlitzdüse für eine kurze Zeit, sobald sie feststellt, dass wieder Substrat zugeführt wird. Dies geschieht, bevor das Substrat zum Beleimen mit der Auftragswalze in Kontakt kommt. Dadurch wird der mit Luft gefüllte Teil in der Schlitzdüse mit Klebstoff ersetzt und es wird etwas Klebstoff auf die Auftragswalze abgegeben. Dieser Klebstoff wird, weil er nicht mit dem Substrat in Kontakt kommt, durch die Rakel abgestreift und entsorgt.The latter disadvantage is eliminated in the device known from practice by the control thereof. The controller of the device has information about when substrate is being supplied. If a production interruption occurs and no substrate is supplied, the controller starts an adjustable counter. If the meter has expired and no substrate has been supplied, the controller activates the glue flow through the slot nozzle for a short time as soon as it detects that substrate is being returned. This happens before the substrate comes into contact with the applicator roll for gluing. As a result, the part filled with air in the slot nozzle is replaced with adhesive and some adhesive is applied to the applicator roll. This adhesive is stripped and disposed of by the squeegee because it does not come into contact with the substrate.

Des Weiteren ist aus der Praxis im Zusammenhang mit einer Spine Coat-Lösungen für eine PUR-Buchrückenverklebung eine Schlitzdüse bekannt, an der die Schlitz-Hilfsantrag 2Furthermore, from practice in connection with a Spine Coat solutions for a PUR Buchrückenverklebung a slot die is known at the slot auxiliary request 2

länge der Düse entsprechend der Buchdicke des zu verklebenden Buchrückens eingestellt werden kann. Die Schlitzdüse besitzt eine Austrittsöffnung und unterhalb dieser Öffnung befindet sich mit einem Abstand eine parallel laufende erste Bohrung. In dieser ersten Bohrung ist eine Kolbenstange, an der eine Fahne befestigt ist, die in den Schlitz der Düse eingreift, in Richtung der ersten Bohrung bewegbar. Sie bildet das verstellbare Ende der Schlitzlänge an der Schlitzdüse, indem die Fahne und der Kolben gegen den Klebstoff abdichten. Der Klebstoff, der durch eine zweite Bohrung, die an der der Kolbenstange gegenüberliegenden Seite in die erste Bohrung mündet, zugeführt wird, fließt über die freie Bohrungslänge der ersten Bohrung und durch den freien Schlitz aus der Schlitzdüse, wenn der Klebstofffluss durch die Schlitzdüse aktiviert ist. - Eine derartige Schlitzdüse lässt sich auch an der Vorrichtung für das Beleimen der schmalen Kante eines Substrats an einer Kantenleimmaschine verwenden. Hierbei treten jedoch die vorbeschriebenen Nachteile auf.Length of the nozzle can be adjusted according to the book thickness of the book spine to be bonded. The slot nozzle has an outlet opening and below this opening is located at a distance a parallel first hole. In this first bore is a piston rod to which a flag is attached, which engages in the slot of the nozzle, movable in the direction of the first bore. It forms the adjustable end of the slot length at the slot nozzle by the flag and the piston seal against the adhesive. The adhesive, which is supplied through a second bore which opens into the first bore at the opposite side of the piston rod, flows from the slot nozzle over the free bore length of the first bore and through the free slot when the adhesive flow through the slot nozzle is activated , Such a slot nozzle can also be used on the device for gluing the narrow edge of a substrate to an edge banding machine. In this case, however, occur the disadvantages described above.

Die Schlitzdüse weist einen Düsenkörper, einen im Düsenkörper gebildeten Düsenschlitz, einen Durchgang im Düsenkörper zum Zuführen des Klebstoffs zum Düsenschlitz sowie eine schlitzförmige Austrittsöffnung des Düsenschlitzes auf.The slot nozzle has a nozzle body, a nozzle slot formed in the nozzle body, a passage in the nozzle body for supplying the adhesive to the nozzle slot and a slot-shaped outlet opening of the nozzle slot.

Aus der US 6 053 978 A ist eine Schlitzdüse bekannt, welche bei einem Auftragsgerät zum Aufbringen eines flüssigem oder pastösem Mediums auf eine laufende Materialbahn, insbesondere einer Materialbahn aus Papier oder Karton dient. Die Schlitzdüse ist dabei derart gestaltet, dass eine möglichst saubere Auftragskante erzielt wird.From the US 6 053 978 A a slot nozzle is known, which is used in a coating device for applying a liquid or pasty medium on a moving material web, in particular a material web of paper or cardboard. The slot nozzle is designed such that the cleanest possible application edge is achieved.

Weiterhin ist aus der US 2012/0219657 A1 eine Schlitzdüse bekannt, die derart gestaltet ist, dass die mittels der Schlitzdüse auf ein Substrat aufgebrachte Schicht eine möglichst einheitliche Schichtdicke entlang einer longitudinalen Erstreckung der Schlitzdüse aufweist.Furthermore, from the US 2012/0219657 A1 a slot nozzle is known, which is designed such that the means of the slot nozzle applied to a substrate layer has a uniform layer thickness along a longitudinal extent of the slot nozzle.

Aus der US 6 319 316 B1 ist ferner eine Schlitzdüse einer Vorrichtung zum Aufbringen von Beschichtungen im Bereich der Mikroelektronik bekannt, wobei diese Schlitzdüse derart gestaltet ist, dass eine möglichst homogene Schichtdicke auf dem zu beschichtenden Material erreicht wird.From the US Pat. No. 6,319,316 B1 Furthermore, a slot nozzle of a device for applying coatings in the field of microelectronics is known, wherein these Slot nozzle is designed such that the most homogeneous layer thickness is achieved on the material to be coated.

Die in den vorgenannten Druckschriften jeweils offenbarte Schlitzdüse weist die Merkmale des Oberbegriffs des Patentanspruchs 1 und 2 auf.The disclosed in each of the aforementioned publications slot nozzle has the features of the preamble of claim 1 and 2.

Aufgabe der vorliegenden Erfindung ist es, eine Schlitzdüse , die die Merkmale des Oberbegriffs des Patentanspruchs 1 und 2 aufweist, so weiterzubilden, dass mittels der Schlitzdüse ein Klebstoffauftrag erzielt werden kann, der nach dem Anbringen und Anpressen des mit dem Substrat zu verbindenden Bauteils, insbesondere Kantenbandes, zwischen diesem und dem Substrat eine nahezu rechteckige Querschnittsform, senkrecht zur Längserstreckung des Bauteils bzw. Kantenbandes gesehen, aufweist.The object of the present invention is to develop a slot die having the features of the preamble of patent claims 1 and 2 such that an adhesive application can be achieved by means of the slot die, in particular after attachment and pressing of the component to be joined to the substrate Edge band, between this and the substrate has a nearly rectangular cross-sectional shape, seen perpendicular to the longitudinal extent of the component or edge band, has.

Gelöst wird die Aufgabe durch eine Schlitzdüse, die gemäß den Merkmalen des Patentanspruchs 1 oder 2 ausgebildet ist.The problem is solved by a slot nozzle, which is formed according to the features of claim 1 or 2.

Bei der erfindungsgemäßen Schlitzdüse ist der Düsenkörper im Bereich abgewandter Enden des Düsenschlitzes, wobei diese Enden auf die Längserstreckung des Düsenschlitzes bezogen sind, derart gestaltet, dass ein erhöhter Austritt des Klebstoffs im Bereich der abgewandten Enden des Düsenschlitzes durch die Austrittsöffnung erfolgt.In the case of the slot nozzle according to the invention, the nozzle body is designed in the region of opposite ends of the nozzle slot, wherein these ends are related to the longitudinal extent of the nozzle slot, such that an increased outlet of the adhesive occurs in the region of the opposite ends of the nozzle slot through the outlet opening.

Es erfolgt bei der erfindungsgemäßen Schlitzdüse zwar nach wie vor ein Klebstoffauftrag auf dem Substrat, über eine Linie in Richtung der Dicke des Substrats betrachtet, die mit einem Anstieg auf die Klebstofffilmdicke startet und mit einem Abfall der Klebstofffilmdicke gegen das Substratende endet. Allerdings erfolgt bei der erfindungsgemäßen Schlitzdüse der Anstiegsbereich mit einer geringfügig überhöhten Klebstofffilmdicke und es startet der Abfall der Klebstofffilmdicke aus einer geringfügig erhöhten Klebstofffilmdicke. Zwischen diesen erhöhten Klebstofffilmdicken am Ende des Anstiegs und zu Beginn des Abfalls erfolgt der Auftrag des Klebstoffs mit der normalen Klebstofffilmdicke. Beim Anbringen und Anpressen des Bauteils bzw. Kantenbandes am Substrat entstehen keine sichtbaren Spalte zwischen Bauteil und Substrat, weil die ansteigenden und abfallenden Klebstoffbereiche durch den Klebstoff aus den erhöhten Bereichen aufgefüllt worden ist.Adhesive coating on the substrate is still effected in the slot die according to the invention, viewed over a line in the direction of the thickness of the substrate, which starts with an increase to the adhesive film thickness and ends with a decrease in the adhesive film thickness towards the substrate end. However, in the slit nozzle of the present invention, the rising area is made with a slightly excessive adhesive film thickness, and the decrease of the adhesive film thickness starts from a slightly increased thickness of the adhesive film. Between these increased adhesive film thicknesses at the end of the rise and at the beginning of the waste, the adhesive is applied at the normal adhesive film thickness. When attaching and pressing the component or edge band on the substrate, no visible gaps between component and Substrate, because the rising and falling adhesive areas has been filled by the adhesive from the raised areas.

Die Schlitzdüse ist üblicherweise derart ausgebildet, dass der Düsenkörper im Bereich der abgewandten Enden des Düsenschlitzes Abschlusskanten bildet. Diese Abschlusskanten begrenzen somit den Düsenschlitz, im Bereich abgewandter Enden, bezüglich des im Düsenschlitz befindlichen Klebstoffs.The slot nozzle is usually designed such that the nozzle body forms end edges in the region of the opposite ends of the nozzle slot. These end edges thus limit the nozzle slot, in the region of opposite ends, with respect to the adhesive located in the nozzle slot.

Aus dem Stand der Technik ist bekannt, dass sich aufgrund einer Reduzierung des Durchflussquerschnitts des Düsenkörpers zu einer konstante Breite aufweisenden Austrittsöffnung hin ein erhöhter Austritt des Klebstoffs im Bereich der abgewandten Enden des Düsenschlitzes durch die Austrittsöffnung ergibt. Die Austrittsöffnung hat somit über ihre gesamte Länge eine konstante Breite. Da bezogen auf die Ausgaberichtung des Klebstoffs, der Durchflussquerschnitt des Düsenkörpers sich zur Austrittsöffnung hin verjüngt, tritt im Bereich der abgewandten Enden des Düsenschlitzes eine geringfügig größere Menge an Klebstoff aus der Schlitzdüse aus als zwischen diesen abgewandten Enden.It is known from the prior art that, due to a reduction of the flow cross section of the nozzle body to an outlet opening having a constant width, an increased exit of the adhesive results in the area of the opposite ends of the nozzle slot through the outlet opening. The outlet opening thus has a constant width over its entire length. Since, based on the dispensing direction of the adhesive, the flow cross-section of the nozzle body tapers toward the outlet opening, a slightly larger amount of adhesive exits the slot nozzle in the area of the opposite ends of the nozzle slot than between these opposite ends.

Ferner ist aus dem Stand der Technik bekannt, dass der Düsenkörper im Bereich der abgewandten Enden des Düsenschlitzes zudem derart gestaltet ist, dass sich der Durchflussquerschnitt des Düsenkörpers zur Austrittsöffnung hin stetig reduziert.Furthermore, it is known from the prior art that the nozzle body in the region of the opposite ends of the nozzle slot is also designed in such a way that the flow cross-section of the nozzle body continuously reduces towards the outlet opening.

Bei dieser bekannten Schlitzdüse weisen die beiden Abschlusskanten insbesondere jeweils eine nicht senkrecht zur Austrittsöffnung verlaufende Form auf. Es kann sich beispielsweise um eine Bogenform oder eine gerade Form handeln. Insbesondere können die beiden Abschlusskanten eine identische, spiegelbildlich angeordnete Form aufweisen.In this known slot nozzle, the two end edges in particular each have a shape that is not perpendicular to the outlet opening. For example, it may be an arched shape or a straight shape. In particular, the two end edges can have an identical, mirror-inverted shape.

Gemäß Patentanspruch 1 ist hingegen vorgesehen, dass die Austrittsöffnung im Bereich der abgewandten Enden des Düsenschlitzes eine größere Breitenerstreckung aufweist als im verbleibenden Bereich der Austrittsöffnung, der eine konstante Breite aufweist. Da der Durchtrittsquerschnitt für Klebstoff durch die Austrittsöffnung des Düsenschlitzes im Bereich der abgewandten Enden des Düsenschlitzes größer ist als in dem Bereich der Austrittsöffnung, der zwischen diesen abgewandten Enden des Düsenschlitzes liegt, kann gleichfalls der erhöhte Auftrag des Klebstoffs auf das Substrat bewerkstelligt werden.According to claim 1, however, provided that the outlet opening in the region of the opposite ends of the nozzle slot has a greater width extension than in the remaining region of the outlet opening, which has a constant width. Since the passage cross section for adhesive through the outlet opening of the Nozzle slot in the region of the opposite ends of the nozzle slot is larger than in the region of the outlet opening, which is located between these opposite ends of the nozzle slot, can also be accomplished, the increased application of the adhesive to the substrate.

Bei dieser Weiterbildung weist der Düsenkörper insbesondere im Bereich der beiden Abschlusskanten, in den diesen Abschlusskanten benachbarten Bereichen der Austrittsöffnung, jeweils eine Verbreiterung der Austrittsöffnung, bei sonst konstanter Breite der Austrittsöffnung auf. Bezogen auf die Breitenerstreckung der Austrittsöffnung kann diese Verbreiterung im Bereich der jeweiligen Abschlusskante nur auf einer Seite der Austrittsöffnung oder auf den beiden gegenüberliegenden Seiten der Austrittsöffnung vorgesehen sein.In this development, the nozzle body, in particular in the region of the two end edges, in the areas of the outlet opening adjacent to these end edges, each have a broadening of the outlet opening, with an otherwise constant width of the outlet opening. Based on the width extension of the outlet opening, this broadening can be provided in the region of the respective terminal edge only on one side of the outlet opening or on the two opposite sides of the outlet opening.

Gemäß Patentanspruch 2 ist hingegen vorgesehen, dass der Düsenkörper im Bereich eines der abgewandten Enden des Düsenschlitzes zur Austrittsöffnung hin verjüngend ausgebildet ist und die Austrittsöffnung im Bereich des anderen Endes der abgewandten Enden des Düsenschlitzes gegenüber der sonst konstanten Breite aufweisenden Austrittsöffnung eine größere Breite aufweist.. Bei dieser Gestaltung ist insbesondere vorgesehen, dass eine der beiden Abschlusskanten eine Bogenform aufweist und der Düsenkörper im Bereich der anderen Abschlusskante, in dem dieser Abschlusskante benachbarten Bereich der Austrittsöffnung, eine Verbreiterung der Austrittsöffnung, bei sonst konstanter Breite der Austrittsöffnung aufweist. Auch durch diese Gestaltung lässt sich der vorstehend grundsätzlich erörterte überhöhte Klebstoffauftrag im Bereich der beiden Abschlusskanten erzielen.According to claim 2, however, it is provided that the nozzle body is tapered in the region of one of the opposite ends of the nozzle slot to the outlet opening and the outlet opening has a greater width in the region of the other end of the opposite ends of the nozzle slot with respect to the otherwise constant width having outlet opening. In this design it is provided in particular that one of the two end edges has an arcuate shape and the nozzle body in the region of the other end edge, in which this end edge adjacent region of the outlet opening, a widening of the outlet opening, with otherwise constant width of the outlet opening. This design also makes it possible to achieve the excessive adhesive application discussed above in principle in the region of the two end edges.

Gemäß einer besondere Ausführungsform der Erfindung ist die Schlitzdüse derart ausgebildet, dass die Länge des Düsenschlitzes und der Austrittsöffnung verstellbar ist. Insbesondere ist die Länge des Düsenschlitzes und der Austrittsöffnung durch ein im Düsenkörper verschiebbar angeordnetes, den Düsenschlitz durchsetzendes Stellteil verstellbar. Hierdurch ist bei baulich sehr einfacher Gestaltung der Schlitzdüse die Verstellung der Länge der Austrittsöffnung des Düsenkörpers bei gleichzeitiger Verstellung der Länge des Düsenschlitzes möglich.According to a particular embodiment of the invention, the slot nozzle is designed such that the length of the nozzle slot and the outlet opening is adjustable. In particular, the length of the nozzle slot and the outlet opening is adjustable by a nozzle body slidably disposed in the nozzle slot passing through the adjusting part. As a result, with structurally very simple design of the slot nozzle, the adjustment of the length of the outlet opening of the nozzle body with simultaneous adjustment of the length of the nozzle slot is possible.

Insbesondere ist die verstellbare Schlitzdüse derart gestaltet, dass eine in dem Düsenteil verschieblich gelagerte und verstellbare Stange im Bereich eines freien Endes das Stellteil aufnimmt. Dieses Stellteil ist insbesondere als plattenförmige Fahne ausgebildet. Vorzugsweise ist die eine Abschlusskante in das Stellteil integriert. Das Stellteil weist auf seiner dem das Medium aufnehmenden Bereich des Düsenschlitzes zugewandten Seite die eine Abschlusskante auf.In particular, the adjustable slot nozzle is designed such that a displaceably mounted in the nozzle member and adjustable rod in the region of a free end receives the control part. This control part is designed in particular as a plate-shaped flag. Preferably, the one end edge is integrated in the control part. The actuating part has on its side facing the medium receiving portion of the nozzle slot on the one end edge.

Bei nicht verstellbarer Schlitzdüse kann der Düsenkörper durchaus einteilig gestaltet sein. Bei einer verstellbaren Schlitzdüse weist der Düsenkörper einen ein- oder mehrteiligen Grundkörper und ein Stellteil auf. Hierbei ist die Länge des Düsenschlitzes und der Austrittsöffnung durch das im Grundkörper verschiebbar gelagerte, den Düsenschlitz durchsetzende Stellteil verstellbar.With non-adjustable slot nozzle, the nozzle body can certainly be designed in one piece. In the case of an adjustable slot nozzle, the nozzle body has a one-part or multi-part main body and an actuating part. Here, the length of the nozzle slot and the outlet opening is adjustable by the displaceably mounted in the base body, the nozzle slot passing through the adjusting part.

Es wird somit eine Schlitzdüse nebst deren Weiterbildungen vorgeschlagen, mit der ein Klebstoffauftrag auf ein Substrat in der Richtung der Substratdicke nach dem Anbringen und Anpressen eines Bauteils, insbesondere eines Kantenbandes, eine nahezu rechteckige Querschnittsform aufweist und dadurch das Substrat, nachdem es mit dem Bauteil bzw. mit dem Kantenband versehen ist, ein ansprechendes Aussehen aufweist.It is thus proposed a slot die together with its developments, with an adhesive application to a substrate in the direction of the substrate thickness after attaching and pressing a component, in particular an edge strip, a nearly rectangular cross-sectional shape and thereby the substrate after it with the component or . is provided with the edge band, has a pleasing appearance.

Die Schlitzdüse kann insbesondere Verwendung finden bei einer Vorrichtung zum Auftragen von Klebstoff auf ein Substrat, mit einer um eine Achse drehbaren Auftragswalze, wobei die Schlitzdüse dem Ausgeben von Klebstoff auf eine Umfangsfläche der Auftragswalze dient, ferner mit einem Abgabebereich der Auftragswalze zum Abgeben von Klebstoff von der Auftragswalze auf das Substrat, und mit einer Abstreifrakel, wobei der Abgabebereich für Klebstoff in Drehrichtung der Auftragswalze hinter der Schlitzdüse zum Ausgeben des Klebstoffs auf die Auftragswalze und vor der Abstreifrakel angeordnet ist, und bei der die Schlitzdüse in der Lage ist, in Richtung der Klebestoffauftragsbreite (Achsrichtung der Auftragswalze) einen Klebstoffauftrag auf der Auftragswalze zu realisieren, der mit einer Überhäufung startet und mit einer Überhäufung endet.The slit nozzle may be particularly used in an apparatus for applying adhesive to a substrate having an applicator roll rotatable about an axis, the slit die serving to apply adhesive to a peripheral surface of the applicator roll, further comprising a dispensing portion of the applicator roll for dispensing adhesive from the applicator roll on the substrate, and with a doctor blade, wherein the delivery area for adhesive in the direction of rotation of the applicator roll is arranged behind the slot nozzle for dispensing the adhesive on the applicator roll and before the doctor blade, and in which the slot nozzle is capable, in the direction of Adhesive application width (axial direction of the applicator roll) to realize an adhesive application on the applicator roll, which starts with an overburden and ends with an overburden.

Weitere Merkmale der Erfindung sind in den Unteransprüchen, der Beschreibung der Figuren und den Figuren selbst dargestellt, wobei bemerkt wird, dass alle Einzelmerkmale und alle Kombinationen von Einzelmerkmalen erfindungswesentlich sind.Further features of the invention are set forth in the subclaims, the description of the figures and the figures themselves, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

In den Figuren ist die Erfindung anhand von einem Ausführungsbeispiel veranschaulicht, ohne auf dieses Ausführungsbeispiel beschränkt zu sein. Es zeigt:

Fig. 1
zur Verdeutlichung des Standes der Technik, einen Schnitt durch ein Düsenteil einer verstellbaren Schlitzdüse zum Ausgeben von flüssigem Klebstoff, mit einer Kolbenstange und einer Fahne zur Verstellung einer Austrittsöffnung der Schlitzdüse, gezeigt in einer Schnittdarstellung I-I in Fig. 3,
Fig. 2
den Stand der Technik, nämlich betreffend Fig.1, eine Seitenansicht auf die ausgebaute Kolbenstange mit Fahne,
Fig. 3
den Stand der Technik, nämlich einen Schnitt durch die Schlitzdüse gemäß der Linie III-III in Fig. 1,
Fig. 4
einen mittels der in den Fig. 1 - 3 zum Stand der Technik verdeutlichten Schlitzdüse auf ein Substrat aufgebrachten Klebstoffauftrag,
Fig. 5
einen mittels der in den Fig. 1 - 3 zum Stand der Technik verdeutlichten Schlitzdüse auf ein Substrat aufgebrachten Klebstoffauftrag, nach dem Anbringen und Anpressen eines Kantenbandes,
Fig. 6 und 7
Darstellungen, die den in den Fig. 4 und 5 veranschaulichten Darstellungen entsprechen, allerdings bei Aufbringen eines Klebstoffauftrags auf das Substrat mittels einer erfindungsgemäß gestalteten Schlitzdüse,
Fig. 8
für ein Ausführungsbeispiel einer Schlitzdüse , welche nicht vom Schutzbereich der Patentansprüche umfasst ist, ein Schnitt durch das Düsenteil der verstellbaren Schlitzdüse gemäß der Linie VIII-VIII in Fig. 9, entsprechend der Schnittdarstellung zum Stand der Technik gemäß Fig. 1,
Fig. 9
einen Schnitt durch die Schlitzdüse gemäß der Linie IX-IX in Fig. 8, entsprechend der Schnittdarstellung zum Stand der Technik in Fig. 3,
Fig. 10
ein Ausführungsbeispiel der erfindungsgemäßen Schlitzdüse in einer Schnittdarstellung gemäß der Linie VIII-VIII in Fig. 9,
Fig. 11
eine Detailansicht XI gemäß Fig. 10.
In the figures, the invention is illustrated by means of an embodiment, without being limited to this embodiment. It shows:
Fig. 1
to illustrate the prior art, a section through a nozzle portion of an adjustable slot nozzle for dispensing liquid adhesive, with a piston rod and a flag for adjusting an outlet opening of the slot nozzle, shown in a sectional view II in Fig. 3 .
Fig. 2
the prior art, namely regarding Fig.1 , a side view of the removed piston rod with flag,
Fig. 3
the prior art, namely a section through the slot according to the line III-III in Fig. 1 .
Fig. 4
one by means of in the Fig. 1-3 state of the art clarified slot nozzle applied to a substrate adhesive application,
Fig. 5
one by means of in the Fig. 1-3 Slotted nozzle clarified the state of the art on a substrate applied adhesive application, after attaching and pressing an edge band,
6 and 7
Representations that in the 4 and 5 illustrated representations, but when applying an adhesive to the substrate by means of an inventively designed slot nozzle,
Fig. 8
for an embodiment of a slot nozzle, which is not covered by the scope of the claims, a section through the nozzle portion of the adjustable slot according to the line VIII-VIII in Fig. 9 , According to the sectional view of the prior art according to Fig. 1 .
Fig. 9
a section through the slot according to the line IX-IX in Fig. 8 , corresponding to the sectional view of the prior art in Fig. 3 .
Fig. 10
an embodiment of the slot according to the invention in a sectional view along the line VIII-VIII in Fig. 9 .
Fig. 11
a detailed view XI according to Fig. 10 ,

In den Fig. 1 bis 3 ist ein Düsenteil einer Schlitzdüse 1 nach dem Stand der Technik gezeigt. Die Schlitzdüse 1 dient dem Ausgeben von flüssigem Klebstoff. Die Schlitzdüse 1 weist einen Düsenkörper 2, einen im Düsenkörper 2 gebildeten Düsenschlitz 3, einen Durchgang 4 im Düsenkörper 2 zum Zuführen des Klebstoffs zum Düsenschlitz 3 sowie eine schlitzförmige Austrittsöffnung 5 des Düsenschlitzes 3 auf. Abgewandte Enden des Düsenschlitzes 3 sind mit den Bezugsziffern 6 und 7 gekennzeichnet. Die Länge des Düsenschlitzes 3 und die Länge der Austrittsöffnung 5 ist durch das Maß l, die Breite jeweils durch das Maß b gekennzeichnet.In the Fig. 1 to 3 a nozzle part of a slot nozzle 1 according to the prior art is shown. The slot nozzle 1 is used for dispensing liquid adhesive. The slot nozzle 1 has a nozzle body 2, a nozzle slot 3 formed in the nozzle body 2, a passage 4 in the nozzle body 2 for supplying the adhesive to the nozzle slot 3 and a slot-shaped outlet opening 5 of the nozzle slot 3. Farther ends of the nozzle slot 3 are indicated by the reference numerals 6 and 7. The length of the nozzle slot 3 and the length of the outlet opening 5 is characterized by the dimension l, the width in each case by the dimension b.

Die Länge l des Düsenschlitzes ist verstellbar. Durch den Düsenschlitz 3 und die Austrittsöffnung 5 kann Klebestoff aus der Schlitzdüse 1 austreten. Die Austrittsöffnung 5 ist rechteckig. Durch Verstellen der Schlitzdüse 1 lässt sich die Längenerstreckung von Düsenschlitz 3 und Austrittsöffnung 5 verändern, bei unveränderter Breitenerstreckung von Düsenschlitz 3 und Austrittsöffnung 5.The length l of the nozzle slot is adjustable. Through the nozzle slot 3 and the outlet opening 5 adhesive can escape from the slot 1. The outlet opening 5 is rectangular. By adjusting the slot 1, the length extension of the nozzle slot 3 and outlet opening 5 can be changed, with unchanged width extension of the nozzle slot 3 and outlet opening. 5

Ein erster Düsenteil 8 und ein zweiter Düsenteil 9 des Düsenkörpers 2 werden durch einen Befestigungskörper 10 mittels Stellschrauben 11 zusammengehalten. Mittig durch die beiden Düsenteile 8, 9 ist etwas unterhalb der Austrittsöffnung 5 der Schlitzdüse 1 eine Bohrung 12 angebracht. In dieser befindet sich eine Kolbenstange 13 mit einer daran befestigten Fahne 14, die in den Düsenschlitz 3 zwischen der Bohrung 12 und der Austrittsöffnung 5 ragt. An der Kolbenstange 13 befindet sich eine Kolbendichtung 15, die den mit Klebstoff füllbaren Raum der Bohrung 12 und des Düsenschlitzes 3 vom nicht mit Klebstoff füllbaren Raum der Bohrung 12 und des Düsenschlitzes 3 trennt. Durch den als weitere Bohrung ausgebildeten Durchgang 4 kann Klebstoff in die Bohrung 12 und den Düsenschlitz 3 eingefördert werden, der dann an der Austrittsöffnung 5 der Schlitzdüse 1 austreten kann. Die Länge des Düsenschlitzes 3 und der Austrittsöffnung 5 ist durch ein Verschieben der Kolbenstange 13 mit der Fahne 14 in Richtung der Längserstreckung der Bohrung 12 veränderbar.A first nozzle part 8 and a second nozzle part 9 of the nozzle body 2 are held together by a fastening body 10 by means of adjusting screws 11. Centrally through the two nozzle parts 8, 9 is slightly below the outlet opening 5 of the slot 1, a bore 12 is attached. In this there is a piston rod 13 with a flag 14 attached thereto, which projects into the nozzle slot 3 between the bore 12 and the outlet opening 5. On the piston rod 13 is a piston seal 15 which separates the adhesive-filled space of the bore 12 and the nozzle slot 3 from the non-adhesive fillable space of the bore 12 and the nozzle slot 3. By formed as a further bore passage 4 adhesive can be conveyed into the bore 12 and the nozzle slot 3, which can then emerge at the outlet opening 5 of the slot 1. The length of the Nozzle slot 3 and the outlet opening 5 is changed by a displacement of the piston rod 13 with the flag 14 in the direction of the longitudinal extent of the bore 12.

Mit einer Schlitzdüse 1 gemäß diesem Stand der Technik kann bei der Vorrichtung zum Anbringen eines Kantenbandes in einer Kantenleimmaschine ein Klebstoffauftrag 16 auf einer Kante des Substrats 17 erzeugt werden, wie er in der Fig. 4 dargestellt ist. Im zur besseren Sichtbarkeit etwas dicker als in der Praxis üblichen Dicke gezeichneten Klebstoffauftrag, ist der Anstieg 18 und Abfall 19 des Klebstoffauftrags 16 an den Rändern des Substrats 17 gut sichtbar. Wird das Kantenband 20 angebracht, so vermag der Pressdruck auf das Kantenband 20 den Klebstoffauftrag nicht zu verformen und es entsteht ein störender, sichtbarer Spalt an den beiden Substrateckkanten, wie es in Fig. 5 veranschaulicht ist.With a slot die 1 according to this prior art, in the device for applying an edge band in an edge banding machine, an adhesive application 16 can be produced on an edge of the substrate 17 as described in US Pat Fig. 4 is shown. In order to improve visibility slightly thicker than in practice usual thickness drawn adhesive application, the increase 18 and drop 19 of the adhesive application 16 at the edges of the substrate 17 is clearly visible. If the edge band 20 is attached, then the pressing pressure on the edge band 20 can not deform the adhesive application and a disturbing, visible gap arises at the two substrate edges, as shown in FIG Fig. 5 is illustrated.

Mit der Erfindung wird eine Schlitzdüse 1 vorgestellt, mit der es möglich ist, den Klebstoffauftrag 16 auf dem Substrat 17 am Anstieg 18 und am Abfall 19 leicht zu überhöhen, wie dies in der Fig. 6 dargestellt ist. Wird das Kantenband 20 angelegt und angepresst, so deformiert sich die Klebstofferhöhung am Anstieg 18 und am Abfall 19 des Klebstoffauftrags 16 und füllt den Anstieg- und den Abfallbereich mit Klebstoff. Dies ist in Fig. 7 gezeigt. Der störende, sichtbare Spalt ist nicht mehr vorhanden. Die Deformation des Klebstoffauftrags ist in dieser Ausführung möglich, weil die Klebstoffüberhöhung nur partiell aufgetragen ist und beim Anpressen des Kantenbandes die ganze Presskraft auf die beiden Klebstoffüberhöhungen wirkt. Da Klebstoff inkompressibel ist, verschiebt sich der Klebstoff gegen die Ecken des Klebstoffauftrags.With the invention, a slot nozzle 1 is presented, with which it is possible to slightly increase the adhesive application 16 on the substrate 17 at the rise 18 and the waste 19, as shown in the Fig. 6 is shown. If the edge band 20 is applied and pressed, the increase in adhesive deforms at the rise 18 and the drop 19 of the adhesive application 16 and fills the rise and the waste area with adhesive. This is in Fig. 7 shown. The disturbing, visible gap is no longer present. The deformation of the adhesive application is possible in this embodiment, because the adhesive increase is only partially applied and the entire pressing force acts on the two adhesive peaks when pressing the edge band. As the adhesive is incompressible, the adhesive shifts towards the corners of the adhesive application.

Die Fig. 8 und 9 veranschaulichen einAusführungsbeispiel einer Schlitzdüse 1, welche nicht vom Schutzbereich der Patentansprüche umfasst ist. Hierbei entspricht die Darstellung der Fig. 9 derjenigen der Fig. 3. Bezüglich des grundsätzlichen Aufbaus der Schlitzdüse 1 wird zur Vermeidung von Wiederholungen auf die vorstehenden Ausführungen zur Schlitzdüse 1 gemäß dem Stand der Technik verwiesen. Der erfindungsgemäße Düsenkörper 2 unterscheidet sich von demjenigen nach dem Stand der Technik nur durch die besondere Ausbildung der Fahne 14 im Bereich deren dem Düsenschlitz 3 zugewandten stirnseitigen Kante, der Abschlusskante 21, und der dieser gegenüberliegenden, somit auf der anderen Seite des Düsenschlitzes 3 angeordneten stirnseitigen Kante, der Abschlusskante 22, die durch die beiden Düsenteile 8, 9 gebildet sind.The Fig. 8 and 9 illustrate an embodiment of a slot nozzle 1, which is not covered by the scope of the claims. Here, the representation corresponds to the Fig. 9 that of the Fig. 3 , With regard to the basic construction of the slot nozzle 1, reference is made to the above explanations of the slot nozzle 1 according to the prior art in order to avoid repetition. The nozzle body 2 according to the invention differs from that of the prior art only by the special design of the flag 14 in the area of the Nozzle slot 3 facing the front edge, the end edge 21, and the opposite of this, thus arranged on the other side of the nozzle slot 3 front edge, the end edge 22, which are formed by the two nozzle parts 8, 9.

In den Fig. 8 und 9, insbesondere der Fig. 8, ist der Durchgang 4 und die Bohrung 12, die Kolbenstange 13 mit der Fahne 14 und die Austrittsöffnung 5 mit der Länge l sichtbar. Das gegen den Düsenschlitz 3 und die Austrittsöffnung 5 zeigende Ende der Fahne 14, somit die Abschlusskante 21, besitzt eine Bogenform. Die Abschlusskante 22, die in den ersten und zweiten Düsenteil 8, 9 eingearbeitet ist und der Fahne 14 mit der Bogenform gegenübersteht, besitzt ebenfalls eine Bogenform, die spiegelbildlich zur Bogenform der Abschlusskante 21 ausgebildet ist. Der Klebstoff gelangt über den Durchgang 4 in die Bohrung 12 und fließt von dort durch zwischen den Abschlusskanten 21, 22 begrenzten Düsenschlitz 3 gegen die Austrittsöffnung 5 mit der Länge l. Durch den von der Bohrung 12 bis zur Austrittsöffnung 5 stetig kleiner werdenden Durchflussquerschnitt, ergibt sich ein erhöhter Klebstoffaustritt an den beiden Enden 6, 7 der Austrittsöffnung 5. Dieser erhöhte Klebstoffaustritt hat zur Folge, dass mit einer Schlitzdüse 1, eingesetzt in der Vorrichtung für das Beleimen von Kanten eines Substrats an Kantenleimmaschinen, der oben zur Fig. 6 beschriebene Klebstoffauftrag mit den Klebstofferhöhungen realisiert werden kann.In the Fig. 8 and 9 , in particular the Fig. 8 , the passage 4 and the bore 12, the piston rod 13 with the flag 14 and the outlet opening 5 with the length l is visible. The pointing towards the nozzle slot 3 and the outlet opening 5 end of the flag 14, thus the end edge 21, has an arc shape. The end edge 22, which is incorporated in the first and second nozzle part 8, 9 and the flag 14 facing the arc shape, also has an arcuate shape which is formed in mirror image to the arc shape of the end edge 21. The adhesive passes through the passage 4 in the bore 12 and flows from there through between the end edges 21, 22 limited nozzle slot 3 against the outlet opening 5 with the length l. Due to the continuously narrowing of the bore 12 to the outlet opening 5 flow cross-section, there is an increased adhesive leakage at the two ends 6, 7 of the outlet opening 5. This increased adhesive leakage has the consequence that with a slot 1, used in the device for the Gluing edges of a substrate to edge banding machines, the top of the Fig. 6 described adhesive application can be realized with the adhesive increases.

Bei dem Ausführungsbeispiel der Erfindung, das in den Fig. 10 und 11 dargestellt ist, ist die Fahne 14 mit deren Abschlusskante 21 gemäß dem vorigen Ausführungsbeispiel ausgebildet, weist somit die Bogenform auf. Allerdings ist die andere Abschlusskante 22 modifiziert. Sie weist keine Bogenform im Sinne der Bogenform der Abschlusskante 21 auf, sondern es weist die Austrittsöffnung 5 im Bereich des Endes 7 gegenüber der sonst konstanten Breite b der Austrittsöffnung eine geringfügig größere Breite b1 auf. Somit kann auch im Bereich dieses Endes 7 ein erhöhter Austritt des Klebstoffs durch die Austrittsöffnung 5 erfolgen. Bei diesem Ausführungsbeispiel der Schlitzdüse 1 ist die Abschlusskante 23 für den mit Klebstoff durchfließbaren Düsenschlitz 3, der in den ersten und/oder dem zweiten Düsenteil 8, 9 eingearbeitet ist, und der Fahne 14 gegenübersteht, eine gerade Nut 23 mit einer Ausdehnung s gegen den Düsenschlitz 3, sodass sich die größere Breite b1 der Austrittsöffnung 5 ergibt. Diese Nut 23 kann sich über die gesamte Länge der Abschlusskante 22 erstrecken. Grundsätzlich ist es aber ausreichend, wenn die Nut 23 in dem der Austrittsöffnung 5 benachbarten Bereich der Abschlusskante 22 angeordnet ist. Die Tiefe der Nut 23 ist dabei gering und hat nur einige Prozente der Breite b von Düsenschlitz 3 und Austrittsöffnung 5, die in etwa der Dicke der Fahne 14 entspricht.In the embodiment of the invention, which in the Fig. 10 and 11 is shown, the flag 14 is formed with the end edge 21 according to the previous embodiment, thus has the arc shape. However, the other end edge 22 is modified. It has no arch shape in the sense of the arch shape of the terminal edge 21, but it has the outlet opening 5 in the region of the end 7 with respect to the otherwise constant width b of the outlet opening a slightly larger width b1. Thus, an increased discharge of the adhesive through the outlet opening 5 can also take place in the area of this end 7. In this embodiment, the slot nozzle 1 is the end edge 23 for the adhesive-flowable nozzle slot 3, which is incorporated in the first and / or the second nozzle part 8, 9, and the flag 14 faces, a straight groove 23 with an extension s against the nozzle slot 3, so that the larger width b1 of the outlet opening 5 results. This groove 23 may extend over the entire length of the end edge 22. In principle, however, it is sufficient if the groove 23 is arranged in the region of the terminal edge 22 adjacent to the outlet opening 5. The depth of the groove 23 is small and has only a few percent of the width b of the nozzle slot 3 and outlet opening 5, which corresponds approximately to the thickness of the flag 14.

Die gerade Nut 23 muss nicht, wie abgebildet, rechtwinklig zur Bohrung 12 angeordnet sein, sondern kann auch geneigt gegen den Düsenschlitz 3 oder die Austrittsöffnung 5 ausgeführt sein. Mit einer Schlitzdüse 1, die eine Fahne 14 in Bogenform und eine derartige Nut 23 aufweist, die den Schlitz der Austrittsöffnung 5 mit der Länge l begrenzen, kann ebenfalls der erhöhte Klebstoffausstoß an den Enden 6, 7 der Austrittsöffnung 5 erreicht werden. Für das Beleimen der Kanten eines Substrats in Kantenleimmaschinen kann der oben beschriebene Effekt auch mit dieser Lösung realisiert werden. Insbesondere dann, wenn die Schlitzdüse 1 nicht verstellbar ist und demzufolge keine verfahrbare Fahne 14 erforderlich ist, kann derThe straight groove 23 need not, as shown, be arranged at right angles to the bore 12, but may also be carried out inclined to the nozzle slot 3 or the outlet opening 5. With a slot nozzle 1, which has a flag 14 in arcuate shape and such a groove 23, which limit the slot of the outlet opening 5 with the length l, also the increased adhesive discharge at the ends 6, 7 of the outlet opening 5 can be achieved. For gluing the edges of a substrate in edge banding machines, the effect described above can also be realized with this solution. In particular, if the slot 1 is not adjustable and therefore no movable flag 14 is required, the

Düsenkörper so gestaltet sein, dass er im Bereich der Abschlusskante 21 des Düsenkörpers 2 dann eine Nut aufweist, die entsprechend der Nut 23 ausgebildet ist.Nozzle body be designed so that it then has a groove in the region of the terminal edge 21 of the nozzle body 2, which is formed corresponding to the groove 23.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Schlitzdüseslot
22
Düsenkörpernozzle body
33
Düsenschlitznozzle slot
44
Durchgangpassage
55
Austrittsöffnungoutlet opening
66
EndeThe End
77
EndeThe End
88th
Düsenteilnozzle part
99
Düsenteilnozzle part
1010
Befestigungskörpermounting body
1111
Stellschraubescrew
1212
Bohrungdrilling
1313
Kolbenstangepiston rod
1414
FahneBanner, flag
1515
Kolbendichtungpiston seal
1616
Klebstoffauftragadhesive application
1717
Substratsubstratum
1818
Anstiegrise
1919
Abfallwaste
2020
Kantenbandedge band
2121
Abschlusskanteterminal edge
2222
Abschlusskanteterminal edge
2323
Nutgroove
bb
Breitewidth
b1b1
Breitewidth
ll
Längelength
ss
Ausdehnungexpansion

Claims (8)

  1. Slotted nozzle (1) for discharging a liquid adhesive, in particular for applying adhesive to a narrow edge of a substrate (17), comprising a nozzle body (2), a nozzle slot (3) formed in the nozzle body (2), a passage (4) in the nozzle body (2) for supplying the adhesive to the nozzle slot (3), and a slot-shaped outlet opening (5) of the nozzle slot (3), wherein the nozzle body (2) is configured in the region of averted ends (6, 7) of the nozzle slot (3), said ends (6, 7) being based on the longitudinal extent of the nozzle slot (3), in such a manner that an increased outlet of the adhesive through the outlet opening (5) takes place in the region of the averted ends (6, 7) of the nozzle slot (3), characterized in that the outlet opening (5) has a greater width extent (b1) in the region of the averted ends (6, 7) of the nozzle slot (3) than in the remaining region of the outlet opening (5), which region has a constant width (b).
  2. Slotted nozzle (1) for discharging a liquid adhesive, in particular for applying adhesive to a narrow edge of a substrate (17), comprising a nozzle body (2), a nozzle slot (3) formed in the nozzle body (2), a passage (4) in the nozzle body (2) for supplying the adhesive to the nozzle slot (3), and a slot-shaped outlet opening (5) of the nozzle slot (3), wherein the nozzle body (2) is configured in the region of averted ends (6, 7) of the nozzle slot (3), said ends (6, 7) being based on the longitudinal extent of the nozzle slot (3), in such a manner that an increased outlet of the adhesive through the outlet opening (5) takes place in the region of the averted ends (6, 7) of the nozzle slot (3), characterized in that the nozzle body (2) is designed tapering towards the outlet opening (5) in the region of one end (6) of the averted ends (6, 7) of the nozzle slot (3), and the outlet opening (5) has a greater width (b1) in the region of the other end (7) of the averted ends (6, 7) of the nozzle slot (3) in comparison to the outlet opening (5) having an otherwise constant width (b).
  3. Slotted nozzle according to Claim 1, characterized in that the nozzle body (2) forms closing edges (21, 22) in the region of the averted ends (6, 7) of the nozzle slot (3), wherein, in the region of the two closing edges (21, 22), the nozzle body (2) in each case has a widened portion of the outlet opening (5), in the regions of the outlet opening (5) that are adjacent to said closing edges (21, 22), with the outlet opening (5) otherwise having a constant width (b).
  4. Slotted nozzle according to Claim 2, characterized in that the nozzle body (2) forms closing edges (21, 22) in the region of the averted ends (6, 7) of the nozzle slot (3), wherein one closing edge (21) of the two closing edges (21, 22) has an arcuate form, and, in the region of the other closing edge (22), the nozzle body (2) has a widened portion of the outlet opening (5), in the region of the outlet opening (5) adjacent to said closing edge (22), with the outlet opening (5) otherwise having a constant width (b).
  5. Slotted nozzle according to one of Claims 1 to 4, characterized in that the slotted nozzle (1) is designed in such a manner that the length (1) of the nozzle slot (3) and of the outlet opening (5) can be changed.
  6. Slotted nozzle according to Claim 5, characterized in that the nozzle body (2) has a single- or multipart main body (8, 9) and an adjustment part (14), wherein the length (1) of the nozzle slot (3) and of the outlet opening (5) can be adjusted by the adjustment part (14) which is mounted displaceably in the main body (8, 9) and passes through the nozzle slot (3).
  7. Slotted nozzle according to Claim 6, characterized in that a rod (13) which is mounted displaceably in the main body (8, 9) and is adjustable receives the adjustment part (14) in the region of a free end, in particular receives the adjustment part which is in the form of a plate-like tab (14).
  8. Slotted nozzle according to Claim 6 or 7, characterized in that the adjustment part (14) has the one closing edge (21) on its side facing the region of the nozzle slot (3) which receives the medium.
EP17163097.3A 2017-03-27 2017-03-27 Slit nozzle Active EP3381571B1 (en)

Priority Applications (2)

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EP17163097.3A EP3381571B1 (en) 2017-03-27 2017-03-27 Slit nozzle
US15/934,670 US10549309B2 (en) 2017-03-27 2018-03-23 Slotted nozzle

Applications Claiming Priority (1)

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EP17163097.3A EP3381571B1 (en) 2017-03-27 2017-03-27 Slit nozzle

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EP3381571B1 true EP3381571B1 (en) 2019-11-06

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Publication number Priority date Publication date Assignee Title
US3595203A (en) * 1968-08-02 1971-07-27 Jack A Fabulich Apparatus for coating edges of plank materials such as particle board plywood and-or platen board
DE29613687U1 (en) * 1996-08-07 1996-10-24 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Applicator for direct or indirect application of a liquid or pasty coating medium to a running material web, in particular made of paper or cardboard
JP3245813B2 (en) * 1996-11-27 2002-01-15 東京エレクトロン株式会社 Coating film forming equipment
US6319316B1 (en) * 1998-02-17 2001-11-20 Fastar, Ltd. System and method for performing low contamination extrusion for microelectronics applications
KR101353661B1 (en) * 2009-06-19 2014-01-20 다즈모 가부시키가이샤 Substrate coating apparatus
JP2012179502A (en) * 2011-02-28 2012-09-20 Nordson Corp Slot nozzle assembly and shim plate
JP5315453B1 (en) * 2012-03-07 2013-10-16 日東電工株式会社 Shim member, die coater and coating film manufacturing method
JP2015112572A (en) * 2013-12-13 2015-06-22 富士フイルム株式会社 Die coater, and manufacturing method for coated film
US10315405B2 (en) * 2014-06-23 2019-06-11 Exel Industries Methods and apparatus for applying protective films

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US10549309B2 (en) 2020-02-04
EP3381571A1 (en) 2018-10-03
US20180272374A1 (en) 2018-09-27

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