EP0719592B1 - Nozzle for applying glue - Google Patents

Nozzle for applying glue Download PDF

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Publication number
EP0719592B1
EP0719592B1 EP95120453A EP95120453A EP0719592B1 EP 0719592 B1 EP0719592 B1 EP 0719592B1 EP 95120453 A EP95120453 A EP 95120453A EP 95120453 A EP95120453 A EP 95120453A EP 0719592 B1 EP0719592 B1 EP 0719592B1
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EP
European Patent Office
Prior art keywords
nozzle
channel
water
elongate
subassembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95120453A
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German (de)
French (fr)
Other versions
EP0719592A2 (en
EP0719592A3 (en
Inventor
Heinz Focke
Michael Schlenker
Peter Kainz
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.)
Focke and Co GmbH and Co KG
Original Assignee
Focke and Co GmbH and Co KG
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
Priority claimed from DE4447016A external-priority patent/DE4447016A1/en
Application filed by Focke and Co GmbH and Co KG filed Critical Focke and Co GmbH and Co KG
Publication of EP0719592A2 publication Critical patent/EP0719592A2/en
Publication of EP0719592A3 publication Critical patent/EP0719592A3/en
Application granted granted Critical
Publication of EP0719592B1 publication Critical patent/EP0719592B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work

Definitions

  • the invention (cf. claim 1) relates to a nozzle assembly for processing of hardening materials, especially for the application of Glue on surfaces to be connected by gluing, such as folding rags of packages with one formed in a nozzle housing Nozzle chamber to which an outwardly leading nozzle channel followed.
  • Packaging technology is increasingly trying to glue on Parts of packaging to be glued together, namely Folding rag, dot or line shaped by glue nozzles apply.
  • the nozzle units that can be used for this must open high performance, namely a high frequency when ejecting small portions of glue.
  • the invention is based, nozzle units for the task the processing of especially quick-curing glue evolve and improve so that the danger of unwanted glue residues in the nozzle assembly avoided and longer downtimes will not cause disruptions in the Guide the nozzle assembly.
  • the nozzle assembly according to the invention characterized in that during business interruptions a sealing liquid, especially water, over at least a water channel opening into the nozzle channel can be fed is such that material is made in the end portion of the nozzle channel this can be extracted and the end section with sealing Liquid, especially water, is filled.
  • the liquid is a particularly good one suitable material for temporary sealing of a mouth-side area of the nozzle channel.
  • the liquid is interrupted by a channel, namely through a water channel into the nozzle channel, such that an area of the nozzle facing the nozzle mouth Nozzle channel is flushed through the water. In this Area remains the water as an effective sealing medium.
  • the sealing Liquid especially water
  • a separate one Water channel led directly into the nozzle channel. Its mouth can pass through during the sealing by water an additional shut-off device on the outside of the nozzle mouth to be introverted.
  • nozzle unit or the nozzle chamber and a closure member in the nozzle chamber.
  • the latter is provided with a nozzle head, the one end limit of the nozzle chamber in the geometric The shape of a spherical dome. This will Avoid voids in which glue residues are collected can.
  • the closure member is also special in terms of problem solving Formed way, namely with a preferably central Longitudinal bore to accommodate a pressure element (spring) and with opening in the area of a conical closure head Connecting channels of the longitudinal bore with the valve chamber.
  • the drawing shows the nozzle assembly in a longitudinal section.
  • the nozzle assembly shown as an embodiment serves especially for the application of small, punctiform portions of glue on documents, especially on folding flaps of packaging from cardboard or the like.
  • a nozzle housing 10 forms inside a nozzle chamber 11. This is from a housing jacket 12 surrounded with circular or polygonal, in particular hexagonal cross section.
  • the nozzle chamber includes im In the present case, glue channel 13 directed transversely axially. This is via a line 14 with a glue supply or Glue pump connected.
  • Nozzle housing 10 has a nozzle head 15 Elongated nozzle channel 16, which is from the nozzle chamber 11 to leads to a nozzle mouth 17.
  • the glue - or another flowable substance - is via the nozzle channel 16 to the outside promoted.
  • a closure member 18 in Slidably mounted in the longitudinal direction.
  • One facing the nozzle channel 16 End of the closure member is converging Cross-section formed, in the present case with a conical closure head 19.
  • a tapered end of this Closure head 19 occurs for the temporary closure of the Nozzle channel 16 in this one. This closed position is drawn shown.
  • the closure member 18 To open and close the nozzle channel 16 is the closure member 18 longitudinally reciprocable, with small Hub. The movements of the closure member 18 become electromagnetic completed.
  • the nozzle housing 10 has one for this purpose electrical coil 20 on.
  • the closure member 18 acts on electrical Acting on the coil 20 like a core, the Closed position withdrawn.
  • the closure member In the direction of the closed position, the closure member is 18th acted upon by an elastic organ, in the present case by a (helical) spring 21. This sits preferably in one central longitudinal bore 22 of the closure member 18. Ein free end is supported on a fixed stop 23 within the nozzle chamber 11.
  • the bolt-like stop 23 also serves as a stop for the closure member 18th
  • Glue can penetrate into the longitudinal bore 22 via the open side.
  • nozzle unit Another special feature of the nozzle unit is the Formation of the nozzle head 15. This consists of an end piece 25 of the nozzle chamber 11 and an adjoining one End piece 26. Connector 25 and end piece 26 are separate Parts that seal against each other in the area of a joint surface lie or are pressed together, in the present Fall through a hollow nut 27.
  • the nozzle channel 16 extends centrally through the connector 25 and through the end piece 26. In the area of the connecting piece 25 is the nozzle channel 16 here with a constant diameter educated.
  • the nozzle channel 16 has in the region of the end piece 26 a conical cross section tapering towards the nozzle mouth 17.
  • the end piece 25 delimits the end region of the nozzle chamber 11 and forms a kind of valve seat in the area of the nozzle channel 16 for the closure head 19.
  • the end piece 25 is on the inside designed so that there are no cavities in which glue can collect.
  • the end piece 25 closes offset to the housing jacket 12.
  • An inner boundary surface 28 of the nozzle chamber 11 is in the region of the end piece 25 arched, namely hemispherical. The With this surface design, glue is always in the right direction passed to the nozzle channel 16.
  • the end piece 25 consists of a particularly strong material, especially ceramic.
  • the end piece 26 is preferably made made of plastic, which due to its technological Property prevents glue from sticking.
  • the nozzle assembly or the nozzle head 15 is an external one Blocking device 29 assigned. This is the present Trap around a movably mounted and in sync with the nozzle unit movable finger, which is in the closed position, especially when there is a long shutdown at the nozzle mouth 17 is present. In the contact area there is a sealing piece 30 arranged from elastic material. This is at the end piece 26 in the closed position.
  • the liquid, especially the water, is separated Channel supplied, namely via a cross to the nozzle channel 16 running water channel 32. This runs in the end piece 26 and flows into the nozzle channel 16.
  • a continuation of the water channel 32 extends in a connected to the nozzle housing 10 Bracket 33.
  • the water channel 32 is within the same a transverse one, namely parallel to the nozzle housing 10 extending supply channel 34 connected. This is over one Water pipe 35 connected to a water source or a pump.
  • the nozzle unit is operated as follows: At the start of a business interruption, the supply of Glue interrupted and water through the water pipe 35 and Water channel 32 promoted. This will cause the nozzle channel 16 glue in the area of the end section 31 is rinsed out. Then the nozzle mouth 17 is closed by the shut-off device 29. The end section of the nozzle channel 16 now remains filled with water, while in the rest of it and in the nozzle chamber 11 glue remains. No more water is pumped in, so that only the system of water channels 32, 34th and the end portion 31 of the nozzle channel 16 filled with water are.
  • shut-off device 29 When the nozzle assembly is started up again, first the shut-off device 29 is moved into the open position and then Promoted glue. Through this inflowing glue is initially the water is conveyed out of the nozzle channel 16. After that is the nozzle assembly is operational again.

Landscapes

  • Coating Apparatus (AREA)
  • Package Closures (AREA)
  • Nozzles (AREA)

Description

Die Erfindung (vgl. Anspruch 1) betrifft ein Düsenaggregat für die Verarbeitung von aushärtenden Materialien, insbesondere zum Auftragen von Leim auf durch Klebung zu verbindende Flächen, wie Faltlappen von Verpackungen mit einer in einem Düsengehäuse gebildeten Düsenkammer, an die ein nach außen führender Düsenkanal anschließt.The invention (cf. claim 1) relates to a nozzle assembly for processing of hardening materials, especially for the application of Glue on surfaces to be connected by gluing, such as folding rags of packages with one formed in a nozzle housing Nozzle chamber to which an outwardly leading nozzle channel followed.

In der Verpackungstechnik wird zunehmend versucht, Leim auf miteinander zu verklebender Teile von Verpackungen, nämlich Faltlappen, durch Leimdüsen punkt- oder linienförmig aufzutragen. Die hierfür einsetzbaren Düsenaggregate müssen auf hohe Leistung ausgerichtet sein, nämlich eine hohe Frequenz beim Ausstoßen von kleinen Leimportionen.Packaging technology is increasingly trying to glue on Parts of packaging to be glued together, namely Folding rag, dot or line shaped by glue nozzles apply. The nozzle units that can be used for this must open high performance, namely a high frequency when ejecting small portions of glue.

Der Erfindung liegt die Aufgabe zugrunde, Düsenaggregate für die Verarbeitung von insbesondere schnell aushärtendem Leim weiterzuentwickeln und zu verbessern, derart, daß die Gefahr von unerwünschten Leimrückständen im Düsenaggregat vermieden wird und auch längere Stillstandszeiten nicht zu Störungen im Düsenaggregat führen.The invention is based, nozzle units for the task the processing of especially quick-curing glue evolve and improve so that the danger of unwanted glue residues in the nozzle assembly avoided and longer downtimes will not cause disruptions in the Guide the nozzle assembly.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Düsenaggregat dadurch gekennzeichnet, daß während Betriebsunterbrechungen eine dichtende Flüssigkeit, insbesondere Wasser, über mindestens einen in den Düsenkanal mündenden Wasserkanal zuführbar ist, derart, daß Material im Endabschnitt des Düsenkanals aus diesem herausförderbar und der Endabschnitt mit dichtender Flüssigkeit, insbesondere Wasser, gefüllt ist.To achieve this object, the nozzle assembly according to the invention characterized in that during business interruptions a sealing liquid, especially water, over at least a water channel opening into the nozzle channel can be fed is such that material is made in the end portion of the nozzle channel this can be extracted and the end section with sealing Liquid, especially water, is filled.

Die Flüssigkeit, insbesondere Wasser, ist ein besonders gut geeignetes Material zum zeitweiligen Abdichten eines mündungsseitigen Bereichs des Düsenkanals. Bei Betriebsunterbrechungen wird die Flüssigkeit durch einen Kanal, nämlich durch einen Wasserkanal in den Düsenkanal geleitet, derart, daß ein der Düsenmündung zugekehrter Bereich des Düsenkanals durch das Wasser freigespült wird. In diesem Bereich bleibt das Wasser als wirksames Dichtungsmedium.The liquid, especially water, is a particularly good one suitable material for temporary sealing of a mouth-side area of the nozzle channel. at The liquid is interrupted by a channel, namely through a water channel into the nozzle channel, such that an area of the nozzle facing the nozzle mouth Nozzle channel is flushed through the water. In this Area remains the water as an effective sealing medium.

Bei der Verarbeitung von viskosen, unter Luft aushärtenden Substanzen ist es bekannt, Düsen bei Betriebsunterbrechungen in einen Flüssigkeitsbehälter mit neutraler Flüssigkeit, z.B. Öl, einzutauchen. Dabei soll Flüssigkeit über die Düsenmündung teilweise in die Düse eindringen und viskoses Material zurückdrängen (US 3 908 869, vgl. Oberbegriff des ersten Anspruchs). Bei dieser bekannten Vorrichtung wird ein mündungsseitiger Endbereich der Düse bzw. eines Düsenkanals nicht ausgespült. Darüber hinaus ist nachteilig, daß das Tauchbad von Betriebsunterbrechungen zu Betriebsunterbrechungen zunehmende Rückstände des zu verarbeitenden viskosen Materials aufnimmt.When processing viscous, air-hardening substances it is known to inject nozzles during outages a liquid container with neutral liquid, e.g. Oil, immerse. Liquid is supposed to flow through the nozzle mouth partially penetrate the nozzle and push back viscous material (US 3 908 869, see preamble of the first claim). In this known device an end region of the nozzle or of a nozzle channel on the mouth side not rinsed out. It is also disadvantageous that the immersion bath increasing from business interruptions to business interruptions Residues of the viscous material to be processed receives.

Bei dem erfindungsgemäßen Düsenaggregat wird die abdichtende Flüssigkeit, insbesondere Wasser, ausschließlich über einen separaten Wasserkanal unmittelbar in den Düsenkanal geleitet. Dessen Mündung kann während der Abdichtung durch Wasser durch ein außen an der Düsenmündung anliegendes Absperrorgan zusätzlich verschlossen sein. In the nozzle assembly according to the invention, the sealing Liquid, especially water, only through a separate one Water channel led directly into the nozzle channel. Its mouth can pass through during the sealing by water an additional shut-off device on the outside of the nozzle mouth to be introverted.

Weitere Merkmale der Erfindung beziehen sich auf die Gestaltung des Düsenaggregats bzw. der Düsenkammer und eines Verschlußorgans in der Düsenkammer. Letztere ist mit einem Düsenkopf versehen, der eine Endbegrenzung der Düsenkammer in der geometrischen Form einer kugelförmigen Kalotte bewirkt. Dadurch werden Hohlräume vermieden, in denen Leimrückstände gesammelt werden können.Further features of the invention relate to the design the nozzle unit or the nozzle chamber and a closure member in the nozzle chamber. The latter is provided with a nozzle head, the one end limit of the nozzle chamber in the geometric The shape of a spherical dome. This will Avoid voids in which glue residues are collected can.

Auch das Verschlußorgan ist im Sinne der Problemlösung in besonderer Weise ausgebildet, nämlich mit einer vorzugsweise mittigen Längsbohrung zur Aufnahme eines Druckorgans (Feder) und mit im Bereich eines kegelförmigen Verschlußkopfes mündenden Verbindungskanälen der Längsbohrung mit der Ventilkammer. The closure member is also special in terms of problem solving Formed way, namely with a preferably central Longitudinal bore to accommodate a pressure element (spring) and with opening in the area of a conical closure head Connecting channels of the longitudinal bore with the valve chamber.

Weitere Einzelheiten und Merkmale des erfindungsgemäßen Düsenaggregats werden nachfolgend anhand des in der Zeichnung dargestellten Ausführungsbeispiel näher erläutert. Die Zeichnung zeigt das Düsenaggregat in einem Längsschnitt.Further details and features of the nozzle assembly according to the invention are subsequently based on the in the drawing illustrated embodiment explained in more detail. The drawing shows the nozzle assembly in a longitudinal section.

Das als Ausführungsbeispiel dargestellte Düsenaggregat dient insbesondere zum Auftragen von kleinen, punktförmigen Leimportionen auf Unterlagen, insbesondere auf Faltlappen von Verpakkungen aus Karton oder dergleichen. Ein Düsengehäuse 10 bildet im Inneren eine Düsenkammer 11. Diese ist von einem Gehäusemantel 12 umgeben mit kreisförmigem oder polygonalem, insbesondere sechseckigem Querschnitt. An die Düsenkammer schließt ein im vorliegenden Falle queraxial gerichteter Leimkanal 13 an. Dieser ist über eine Leitung 14 mit einem Leimvorrat bzw. einer Leimpumpe verbunden.The nozzle assembly shown as an embodiment serves especially for the application of small, punctiform portions of glue on documents, especially on folding flaps of packaging from cardboard or the like. A nozzle housing 10 forms inside a nozzle chamber 11. This is from a housing jacket 12 surrounded with circular or polygonal, in particular hexagonal cross section. The nozzle chamber includes im In the present case, glue channel 13 directed transversely axially. This is via a line 14 with a glue supply or Glue pump connected.

Auf der zum Leimkanal 13 gegenüberliegenden Seite bildet das Düsengehäuse 10 einen Düsenkopf 15. In diesem verläuft ein langgestreckter Düsenkanal 16, der von der Düsenkammer 11 bis zu einer Düsenmündung 17 führt. Der Leim - oder eine andere fließfähige Substanz - wird über den Düsenkanal 16 nach außen gefördert.This forms on the side opposite to the glue channel 13 Nozzle housing 10 has a nozzle head 15 Elongated nozzle channel 16, which is from the nozzle chamber 11 to leads to a nozzle mouth 17. The glue - or another flowable substance - is via the nozzle channel 16 to the outside promoted.

Innerhalb der Düsenkammer 11 ist ein Verschlußorgan 18 in Längsrichtung verschiebbar gelagert. Ein dem Düsenkanal 16 zugekehrtes Ende des Verschlußorgans ist mit einem konvergierenden Querschnitt ausgebildet, im vorliegenden Falle mit einem kegelförmigen Verschlußkopf 19. Ein spitz zulaufendes Ende dieses Verschlußkopfes 19 tritt zum zeitweiligen Verschließen des Düsenkanals 16 in diesen ein. Diese Schließstellung ist zeichnerisch dargestellt.Within the nozzle chamber 11 is a closure member 18 in Slidably mounted in the longitudinal direction. One facing the nozzle channel 16 End of the closure member is converging Cross-section formed, in the present case with a conical closure head 19. A tapered end of this Closure head 19 occurs for the temporary closure of the Nozzle channel 16 in this one. This closed position is drawn shown.

Zum Öffnen und Schließen des Düsenkanals 16 ist das Verschlußorgan 18 in Längsrichtung hin- und herbewegbar, mit kleinem Hub. Die Bewegungen des Verschlußorgans 18 werden elektromagnetisch vollzogen. Das Düsengehäuse 10 weist zu diesem Zweck eine elektrische Spule 20 auf. Das Verschlußorgan 18 wirkt bei elektrischer Beaufschlagung der Spule 20 wie ein Kern, wird aus der Schließstellung zurückgezogen.To open and close the nozzle channel 16 is the closure member 18 longitudinally reciprocable, with small Hub. The movements of the closure member 18 become electromagnetic completed. The nozzle housing 10 has one for this purpose electrical coil 20 on. The closure member 18 acts on electrical Acting on the coil 20 like a core, the Closed position withdrawn.

In Richtung auf die Schließstellung ist das Verschlußorgan 18 durch ein elastisches Organ beaufschlagt, im vorliegenden Fall durch eine (Schrauben-)Feder 21. Diese sitzt in einer vorzugsweise mittigen Längsbohrung 22 des Verschlußorgans 18. Ein freies Ende stützt sich auf einem festen Anschlag 23 innerhalb der Düsenkammer 11 ab. Der bolzenartige Anschlag 23 dient auch als Anschlag für das Verschlußorgan 18.In the direction of the closed position, the closure member is 18th acted upon by an elastic organ, in the present case by a (helical) spring 21. This sits preferably in one central longitudinal bore 22 of the closure member 18. Ein free end is supported on a fixed stop 23 within the nozzle chamber 11. The bolt-like stop 23 also serves as a stop for the closure member 18th

In die Längsbohrung 22 kann über die offene Seite Leim eindringen. Damit ein Durchströmungseffekt entsteht, besteht eine Besonderheit des Düsenaggregats darin, daß ein innenliegendes Ende der Längsbohrung 22 über quer- bzw. schräggerichtete Anschlußbohrungen 24 mit der Düsenkammer 11 verbunden ist. Leim kann demnach in Längsrichtung durch die Längsbohrung 22 hindurchströmen.Glue can penetrate into the longitudinal bore 22 via the open side. There is a special feature that creates a flow effect of the nozzle assembly in that an internal End of the longitudinal bore 22 via transverse or oblique connection bores 24 is connected to the nozzle chamber 11. glue can therefore flow through the longitudinal bore 22 in the longitudinal direction.

Eine weitere Besonderheit des Düsenaggregats besteht in der Ausbildung des Düsenkopfes 15. Dieser besteht aus einem Abschlußstück 25 der Düsenkammer 11 und einem hieran anschließenden Endstück 26. Anschlußstück 25 und Endstück 26 sind gesonderte Teile, die im Bereich einer Stoßfläche dichtend aneinander liegen bzw. aneinander gedrückt werden, im vorliegenden Fall durch eine Hohlmutter 27.Another special feature of the nozzle unit is the Formation of the nozzle head 15. This consists of an end piece 25 of the nozzle chamber 11 and an adjoining one End piece 26. Connector 25 and end piece 26 are separate Parts that seal against each other in the area of a joint surface lie or are pressed together, in the present Fall through a hollow nut 27.

Der Düsenkanal 16 erstreckt sich mittig durch das Anschlußstück 25 und durch das Endstück 26. Im Bereich des Anschlußstücks 25 ist der Düsenkanal 16 hier mit gleichbleibendem Durchmesser ausgebildet. Im Bereich des Endstücks 26 hat der Düsenkanal 16 einen sich zur Düsenmündung 17 verjüngenden, konischen Querschnitt.The nozzle channel 16 extends centrally through the connector 25 and through the end piece 26. In the area of the connecting piece 25 is the nozzle channel 16 here with a constant diameter educated. The nozzle channel 16 has in the region of the end piece 26 a conical cross section tapering towards the nozzle mouth 17.

Das Abschlußstück 25 begrenzt den Endbereich der Düsenkammer 11 und bildet im Bereich des Düsenkanals 16 eine Art Ventilsitz für den Verschlußkopf 19. Das Abschlußstück 25 ist innenseitig so gestaltet, daß keine Hohlräume entstehen, in denen sich Leim sammeln kann. Zu diesem Zweck schließt das Abschlußstück 25 versatzfrei an den Gehäusemantel 12 an. Eine innere Begrenzungsfläche 28 der Düsenkammer 11 ist im Bereich des Abschlußstücks 25 gewölbt ausgebildet, nämlich halbkugelförmig. Der Leim wird durch diese Oberflächengestaltung stets in Richtung zum Düsenkanal 16 geleitet.The end piece 25 delimits the end region of the nozzle chamber 11 and forms a kind of valve seat in the area of the nozzle channel 16 for the closure head 19. The end piece 25 is on the inside designed so that there are no cavities in which glue can collect. For this purpose, the end piece 25 closes offset to the housing jacket 12. An inner boundary surface 28 of the nozzle chamber 11 is in the region of the end piece 25 arched, namely hemispherical. The With this surface design, glue is always in the right direction passed to the nozzle channel 16.

Das Abschlußstück 25 besteht aus einem besonders festen Material, insbesondere aus Keramik. Das Endstück 26 besteht vorzugsweise aus Kunststoff, der aufgrund seiner technologischen Eigenschaft das Anhaften von Leim verhindert.The end piece 25 consists of a particularly strong material, especially ceramic. The end piece 26 is preferably made made of plastic, which due to its technological Property prevents glue from sticking.

Dem Düsenaggregat bzw. dem Düsenkopf 15 ist ein außenliegendes Absperrorgan 29 zugeordnet. Bei diesem handelt es sich im vorliegenden Falle um einen bewegbar gelagerten und synchron mit dem Düsenaggregat bewegbaren Finger, der in Verschlußstellung, insbesondere bei längerer Betriebsunterbrechung, an der Düsenmündung 17 anliegt. Im Anlagebereich ist ein Abdichtstück 30 aus elastischem Werkstoff angeordnet. Dieses liegt am Endstück 26 in Schließstellung an.The nozzle assembly or the nozzle head 15 is an external one Blocking device 29 assigned. This is the present Trap around a movably mounted and in sync with the nozzle unit movable finger, which is in the closed position, especially when there is a long shutdown at the nozzle mouth 17 is present. In the contact area there is a sealing piece 30 arranged from elastic material. This is at the end piece 26 in the closed position.

Ein wichtiges Merkmal sind Maßnahmen, mit denen ein Abbinden bzw. Austrocknen von Leim im Bereich des Düsenkanals 16 bei Betriebsunterbrechung, und zwar auch bei längeren Pausen, verhindert wird. Zu diesem Zweck wird bei Beginn der Betriebsunterbrechung der Düsenkanal 16 bzw. ein der Düsenmündung 17 zugekehrter Abschnitt desselben mit einem strömenden Medium, insbesondere einer Flüssigkeit, freigespült. Vorzugsweise wird hierfür Wasser eingesetzt, gegebenenfalls mit dem Leim angepaßten Zusätzen. Nach dem Freispülen des Düsenkanals 16 bzw. eines Endabschnitts 31 desselben bleibt die Flüssigkeit im Düsenkanal 16 bzw. in diesem Endabschnitt 31 und bewirkt eine flüssige Abdichtung nach außen. Das Absperrorgan 29 befindet sich dabei in der gezeigten Verschlußstellung.An important feature is measures with which a setting or drying out of glue in the area of the nozzle channel 16 in the event of an interruption in operation, even during long breaks, prevented becomes. For this purpose, at the beginning of the business interruption the nozzle channel 16 or one facing the nozzle mouth 17 Section of the same with a flowing medium, in particular a liquid, washed away. This is preferred Water used, if necessary, adjusted with the glue Additives. After flushing the nozzle channel 16 or one The end section 31 of the same remains in the liquid in the nozzle channel 16 or in this end section 31 and brings about a liquid seal outward. The shut-off device 29 is located in the closed position shown.

Die Flüssigkeit, insbesondere das Wasser, wird über einen separaten Kanal zugeführt, nämlich über einen quer zum Düsenkanal 16 verlaufenden Wasserkanal 32. Dieser verläuft im Endstück 26 und mündet im Düsenkanal 16. Eine Fortsetzung des Wasserkanals 32 erstreckt sich in einer mit dem Düsengehäuse 10 verbundenen Halterung 33. Innerhalb desselben ist der Wasserkanal 32 mit einem quergerichteten, nämlich parallel zum Düsengehäuse 10 verlaufenden Zuführungskanal 34 verbunden. Dieser ist über eine Wasserleitung 35 mit einer Wasserquelle bzw. einer Pumpe verbunden.The liquid, especially the water, is separated Channel supplied, namely via a cross to the nozzle channel 16 running water channel 32. This runs in the end piece 26 and flows into the nozzle channel 16. A continuation of the water channel 32 extends in a connected to the nozzle housing 10 Bracket 33. The water channel 32 is within the same a transverse one, namely parallel to the nozzle housing 10 extending supply channel 34 connected. This is over one Water pipe 35 connected to a water source or a pump.

Mit dieser Einrichtung wird das Düsenaggregat wie folgt betrieben: Bei Beginn einer Betriebsunterbrechung wird die Zufuhr von Leim unterbrochen und Wasser über die Wasserleitung 35 und den Wasserkanal 32 gefördert. Dadurch wird der sich im Düsenkanal 16 im Bereich des Endabschnitts 31 befindende Leim ausgespült. Danach wird die Düsenmündung 17 durch das Absperrorgan 29 verschlossen. Es bleibt nun der Endabschnitt des Düsenkanals 16 mit Wasser gefüllt, während im übrigen Teil desselben sowie in der Düsenkammer 11 Leim bleibt. Es wird kein Wasser mehr nachgefördert, so daß lediglich das System der Wasserkanäle 32, 34 und der Endabschnitt 31 des Düsenkanals 16 mit Wasser gefüllt sind.With this device, the nozzle unit is operated as follows: At the start of a business interruption, the supply of Glue interrupted and water through the water pipe 35 and Water channel 32 promoted. This will cause the nozzle channel 16 glue in the area of the end section 31 is rinsed out. Then the nozzle mouth 17 is closed by the shut-off device 29. The end section of the nozzle channel 16 now remains filled with water, while in the rest of it and in the nozzle chamber 11 glue remains. No more water is pumped in, so that only the system of water channels 32, 34th and the end portion 31 of the nozzle channel 16 filled with water are.

Bei erneuter Inbetriebnahme des Düsenaggregats wird zunächst das Absperrorgan 29 in die Öffnungsstellung bewegt und danach Leim gefördert. Durch diesen nachströmenden Leim wird zunächst das Wasser aus dem Düsenkanal 16 herausgefördert. Danach ist das Düsenaggregat wieder betriebsfähig.When the nozzle assembly is started up again, first the shut-off device 29 is moved into the open position and then Promoted glue. Through this inflowing glue is initially the water is conveyed out of the nozzle channel 16. After that is the nozzle assembly is operational again.

Claims (9)

  1. Nozzle subassembly for processing free-flowing, hardening materials, in particular for applying glue to surfaces, such as folding tabs of packs, which are to be connected by adhesive bonding, having a nozzle chamber (11) which is formed in a nozzle housing (10) and is adjoined by an outwardly leading nozzle channel (16), it being the case, for relatively long interruptions in operation, that an end section (31) of said nozzle channel (16), this end section being directed towards a nozzle mouth (17), is filled with a sealing liquid, in particular water, and, upon re-activation, this liquid can be conveyed out of the end section (31) of the nozzle channel (16), characterized in that the sealing liquid, in particular water, can be fed via at least one water channel (32), which opens out into the nozzle channel (16), such that material in the end section (31) of the nozzle channel (16) can be conveyed out of the same and the end section (31) is filled with sealing liquid or water.
  2. Nozzle subassembly according to Claim 1, characterized in that, during an interruption in operation, the nozzle mouth (17) of the liquid-filled nozzle channel (16) is closed by a shut-off element (29).
  3. Nozzle subassembly according to Claim 1 or 2, characterized in that a predominant part of the water channel (32) runs outside a nozzle housing (10), in particular in a mount (33) for the nozzle housing (10).
  4. Nozzle subassembly according to Claim 1 or one of the further claims, characterized by a service station which is remote from an operating position and is intended for accommodating the nozzle subassembly during the temporary interruption in operation, the service station having a mount for the nozzle subassembly and a collecting trough, for glue and liquid or water, arranged beneath the nozzle subassembly.
  5. Nozzle subassembly according to Claim 1 or one of the further claims, characterized in that the nozzle chamber (11) is elongate, and in that the elongate nozzle chamber (11), on the outlet side, has a termination surface with no edges or corners, in particular a hemispherical boundary surface (28).
  6. Nozzle subassembly according to Claim 1 or one of the further claims, characterized in that the nozzle chamber (11) is elongate, and in that the elongate nozzle chamber (11), on the outlet side, is bounded by a separate termination piece (25), in particular made of ceramic material or the like, an inner boundary surface (28) of the termination piece (25) being curved, in particular designed in the form of a spherical surface with a centrally arranged nozzle channel.
  7. Nozzle subassembly according to Claim 1 or one of the further claims, characterized in that the nozzle channel (16) can be closed by a preferably electromagnetically moveable closure element (18) with an end region, namely closure head (19), which tapers conically to a point.
  8. Nozzle subassembly according to Claim 7, characterized in that the closure element (18) is elongate, and in that formed in the elongate closure element (18) is a longitudinal bore (22) which is open on one side and is intended for accommodating a spring (21), and in that at the end which is directed towards the nozzle channel (16), in particular in the region of the closure head (18), the longitudinal bore (22) is connected to the nozzle chamber (11) via connection bores (24).
  9. Nozzle subassembly according to Claim 1 or one of the further claims, characterized in that a nozzle head (15) for accommodating the nozzle channel (16) comprises at least two parts which butt closely against one another, namely the termination piece (25) and an adjoining end piece (26), the nozzle channel (16) extending in a stepless manner as far as the nozzle mouth (17) in the region of the termination piece (25) and of the end piece (26).
EP95120453A 1994-12-30 1995-12-22 Nozzle for applying glue Expired - Lifetime EP0719592B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4447016 1994-12-30
DE4447016A DE4447016A1 (en) 1994-12-30 1994-12-30 Pressure jet applicator for rapid hardening glue
US08/582,097 US5915625A (en) 1994-12-30 1996-01-02 Nozzle unit for applying glue

Publications (3)

Publication Number Publication Date
EP0719592A2 EP0719592A2 (en) 1996-07-03
EP0719592A3 EP0719592A3 (en) 1997-05-02
EP0719592B1 true EP0719592B1 (en) 2003-03-26

Family

ID=25943418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120453A Expired - Lifetime EP0719592B1 (en) 1994-12-30 1995-12-22 Nozzle for applying glue

Country Status (3)

Country Link
US (1) US5915625A (en)
EP (1) EP0719592B1 (en)
JP (1) JPH08252487A (en)

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Also Published As

Publication number Publication date
JPH08252487A (en) 1996-10-01
US5915625A (en) 1999-06-29
EP0719592A2 (en) 1996-07-03
EP0719592A3 (en) 1997-05-02

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