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EP0245325B1 - Adhesive application process - Google Patents

Adhesive application process Download PDF

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Publication number
EP0245325B1
EP0245325B1 EP19860906322 EP86906322A EP0245325B1 EP 0245325 B1 EP0245325 B1 EP 0245325B1 EP 19860906322 EP19860906322 EP 19860906322 EP 86906322 A EP86906322 A EP 86906322A EP 0245325 B1 EP0245325 B1 EP 0245325B1
Authority
EP
European Patent Office
Prior art keywords
coating
glue
spine
cover
book
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
EP19860906322
Other languages
German (de)
French (fr)
Other versions
EP0245325A1 (en
Inventor
Erich Reckziegel
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT86906322T priority Critical patent/ATE58677T1/en
Publication of EP0245325A1 publication Critical patent/EP0245325A1/en
Application granted granted Critical
Publication of EP0245325B1 publication Critical patent/EP0245325B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C7/00—Manufacturing bookbinding cases or covers of books or loose-leaf binders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D3/00—Book covers
    • B42D3/002—Covers or strips provided with adhesive for binding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10S156/908—Laminating sheet to entire edge of block and both adjacent opposite surfaces, e.g. bookbinding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1034—Overedge bending of lamina about edges of sheetlike base
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31591—Next to cellulosic

Definitions

  • the invention relates to an adhesive application process in book production when connecting the book block and cover (1) using a hot-melt adhesive to be applied to the cover, preferably with the glue (6) for the spine side gluing (7) onto the cover (1 ) is applied.
  • book production is understood in addition to the production of books in the actual sense also to the production of other graphic products, such as magazines and catalogs.
  • book block the term “book spine” and the like used in the following have a corresponding general meaning.
  • dispersion adhesives In practice, dispersion adhesives, glutin glues and hot melt adhesives are used for gluing.
  • the range of use of these adhesive groups is, however, limited, since depending on the type of adhesive, papers which are difficult to bind are no longer bonded with a strength sufficient for use. Volatile portions of the printing ink or the printing ink or components of the surface coating that may have been applied to the contents sheets can migrate from the envelope into the adhesive and reduce its strength. In addition, there is limited flexibility at low temperatures of below - 20 ° C and a decrease in strength at high temperatures of over 80 ° C. The difficulties with the systems mentioned, which work with a single or multi-layer application, can be largely remedied by using one- or two-component PUR melts.
  • adhesive application systems are already known from DE-B-12 74 864 and from DE-A-19 22 056, which continuously or discontinuously, equipped with one or more nozzles, limit adhesive to width and length to one Substrate, such as the closure flap of a box, can apply.
  • Dispersion adhesives as well as glues of animal origin and hot melt adhesives are suitable for these application systems.
  • Hot melt adhesives based on polyethylene, polyvinyl acetate or polyamide are applied to envelopes. Such adhesives can be heat-activated several times. Therefore, in accordance with US-A-4 129 471, the hot melt adhesive is first applied to the envelope, and then activated again at some time later in suitable devices, i.e. made molten in order to then glue the envelope to the leaves.
  • moisture-curing polyurethane hot melt adhesives are completely different in nature. These cannot be reactivated heat several times, so that the connection to the sides to be glued must be made very quickly after the adhesive has been applied to an envelope.
  • Moisture-crosslinking polyurethane hotmelt adhesives have so far been processed using processes in which the adhesive is transferred from a dip tank to a rotating roller and from there is passed on to book spines that are guided past it. However, the adhesive is only transferred to the spine of the book and very thin layers of adhesive cannot be realized.
  • the known roller processes also have the disadvantage that they lead to foaming of the adhesive at high speeds and an adhesive skin forms on the surface of the adhesive level by crosslinking in the plunge pool from which the adhesive is transferred to the roller.
  • the invention has for its object to provide a method with which moisture-curing polyurethane hotmelt adhesives in book production for back gluing and side gluing of the connecting surface of the book block and cover can be processed without problems and above all are economical and trouble-free to apply.
  • this task becomes Solved according to the invention in that a moisture-crosslinking polyurethane hot-melt adhesive is applied to the cover in a width exceeding the book spine thickness on both sides by 0.5 mm by means of a slot nozzle or a multi-hole nozzle, in particular in the contact process, in a thin layer thickness of 0.1 mm onwards .
  • the PUR hotmelt adhesive can be applied in the entire width in the same thickness, since relatively thin layer thicknesses in the range from 1/10 to 2/10 mm are to be used, so that the slope resulting from the side gluing in the area of Spine little disturbs. The extent of the disturbance decreases with increasing thickness of the book block.
  • slot nozzles or multi-hole nozzles are used as application heads, which allow a differentiation in the application thickness in the area of book spines and side gluing by means of stepped front surfaces in the slot nozzle and by smaller nozzle hole diameters in the area of side gluing in the multi-hole nozzle.
  • the nozzles for the side gluing can also be carried out separately from the back gluing, in which case there is a choice in each case to apply the side gluing to the cover or to the book spine.
  • slot nozzles can also be carried out separately from the back gluing, in which case there is a choice in each case to apply the side gluing to the cover or to the book spine.
  • Another important advantage of the invention is that when the adhesive application system is shut down for a limited time, there is no noticeable change in the adhesive largely sealed in the nozzle against external influences. In the event of longer interruptions and end of work, the system can be completely closed by removing the nozzle and closing the feeder. The effort required to clean the nozzle head is low compared to the efforts previously used to clean an entire roller-mounted application system.
  • an envelope provided for gluing onto the spine of a book block is designated by 1 in total.
  • the envelope 1 has an inner grooving pair 2, 3 and an outer grooving pair 4, 5.
  • the back gluing 6 and the side gluing 7 can be provided flat as in FIG. 1 or as separate adhesive strips 8 and 9 as in FIG. 2.
  • a nozzle head 10 with a total of 11 designated slot nozzle for applying back gluing and side gluing 6 and 7 is provided.
  • the slot nozzle 11 can work in the contact process or the adhesive from a nozzle not just touching the envelope paper, i.e. Apply to the respective surface 6 or 7 over a short distance.
  • a slot nozzle 11 is provided which has a gradation 12 on the edges provided for the side gluing, such that the central part 13 of the slot nozzle 11 provides a thicker adhesive coating than the edge parts in the area of the gradation 12.
  • a slot nozzle 11 can be provided with the same slot thickness everywhere.
  • the exemplary embodiment according to FIG. 2 shows a nozzle head 14 with a multi-hole nozzle, designated overall by 15. Amounts of 0.5 to 5 mm can be provided as hole spacing of the multi-hole nozzle 15 both in the area of the back gluing and the side gluing 7. In this case as well - even if there is no actual side gluing - a back gluing 6 is applied, which is about 0.5 to 2 mm wider than the book spine to be glued in order to reliably grasp the respective margins.
  • the nozzle hole diameter in the area of the side gluing 7 may be smaller than the desired difference in adhesive thickness than in the area of the back gluing 6 .
  • the adhesive strips 9 in the area of the side gluing 7 are significantly narrower than the adhesive strips 8 in the area of the back gluing 6.
  • either the nozzle head 10 or 14 is moved in the arrow direction 16 relative to the envelope 1 or the envelope 1 in the arrow direction 16 relative to the nozzle head 10 or 14 during operation.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Making Paper Articles (AREA)

Abstract

In order to be able to use, in the production of books, humidifying PUR melting adhesive systems for the binding of the body of the book and the cover (1), the adhesive is applied to the cover (1) in a width which exceeds the thickness of the back of the book on both sides by about 0.5 to 20 mm.

Description

Die Erfindung richtet sich auf ein Klebstoffauftragsverfahren in der Buchherstellung beim Verbinden von Buchblock und Umschlag (1) unter Verwendung eines auf den Umschlag aufzutragenden Heißschmelzklebstoffes, wobei vorzugsweise zugleich mit der Beleimung (6) für den Buchrücken eine Seitenbeleimung (7) auf den Umschlag (1) aufgebracht wird.The invention relates to an adhesive application process in book production when connecting the book block and cover (1) using a hot-melt adhesive to be applied to the cover, preferably with the glue (6) for the spine side gluing (7) onto the cover (1 ) is applied.

Unter dem Begriff "Buchherstellung" wird im vorliegenden Zusammenhang außer dem Herstellen von Büchern im eigentlichen Sinne auch das Herstellen von anderen graphischen Produkten, wie Zeitschriften und Katalogen, verstanden. Eine entsprechend allgemeine Bedeutung haben die im folgenden verwendeten Begriffe "Buchblock", "Buchrücken" und dergleichen.In the present context, the term “book production” is understood in addition to the production of books in the actual sense also to the production of other graphic products, such as magazines and catalogs. The terms "book block", "book spine" and the like used in the following have a corresponding general meaning.

Für die Klebeverbindung graphischer Produkte auf Tischgeräten sowie halb- oder vollautomatischen Klebebindemaschinen wird der Klebstoff auf dem Umweg über Walzenauftragssysteme unmittelbar auf den Buchrücken aufgebracht. Dazu werden offene Leimbecken verwendet. Es ist auch schon versucht worden, mit der Form des Buchrükkens angepaßten Düsen den Klebstoffauftrag ebenfalls unmittelbar auf den Buchrücken aufzubringen. Diese Verfahrensweise scheiterte jedoch daran, daß die Randblätter an der Schnittkante nicht sicher bzw. vollständig mit Klebstoff abgedeckt werden konnten. Insbesondere bei hochvolumigen Papieren, bei denen der Verformungsgrad durch den Druck der erforderlichen Haltezange besonders ausgeprägt ist, treten häufig Störungen auf.For the adhesive connection of graphic products on tabletop devices as well as semi or fully automatic perfect binding machines, the adhesive is applied directly to the spine by means of roller application systems. Open glue pools are used for this. Attempts have also already been made to apply the adhesive application directly to the back of the book with nozzles adapted to the shape of the book spine. However, this procedure failed because the edge sheets at the cut edge could not be covered securely or completely with adhesive. Faults frequently occur, in particular in the case of high-volume papers in which the degree of deformation is particularly pronounced due to the pressure of the required holding pliers.

Zum Kleben werden in der Praxis Dispersionsklebstoffe, Glutinleime und Schmelzklebstoffe eingesetzt. Die Einsatzbreite dieser Klebstoffgruppen ist jedoch begrenzt, da je nach Klebstofftyp schwierig zu bindende Papiere nicht mehr mit einem für die Gebrauchsbeanspruchung ausreichenden Festigkeit gebunden werden. So können flüchtige Anteile der eventuell auf die Inhaltsbögen aufgebrachten Druckfarbe oder auch der Druckfarbe oder von Bestandteilen der Oberflächenbeschichtung aus dem Umschlag in den Klebstoff migrieren und dessen Festigkeit reduzieren. Hinzu kommt eine begrenzte Flexibilität bei tiefen Temperaturen von unter - 20°C sowie ein Nachlassen der Festigkeit bei hohen Temperaturen von über 80°C. Die Schwierigkeiten bei den genannten Systemen, die mit ein- oder mehrschichtigem Auftrag arbeiten, können an sich durch Verwendung von ein- oder zweikomponentigen PUR-Schmelzstoffen weitgehend behoben werden. Während jedoch Zweikomponentensysteme mit den vorgenannten Walzenauftragssystemen noch gut zu verarbeiten und zu beherrschen sind, gilt dies nicht mehr für die bei Feuchtigkeit vernetzenden PUR-Schmelzklebstoffsysteme. Durch wesentlich kleinere weitgehend abgekapselte Auftragssysteme kann hierbei zwar eine Verbesserung erreicht werden, die grundsätzliche Gefahr einer unerwünschten Vernetzung bleibt jedoch bestehen. Bei längeren Arbeitspausen, wie sie bei Formatwechsel, Maschinenumschaltung oder bei Störungen vorgeschalteter Maschinen auftreten können, ist daher das Auftragssystem entweder zu reinigen oder es muß die Gefahr einer Vernetzung des noch im Auftragssystem befindlichen Klebstoffs in Kauf genommen werden. Da vollständig vernetzte PUR-Schmelzklebstoffe nicht löslich oder aufschmelzbar sind, kann eine Reinigung nur noch mechanisch und entsprechend zeitaufwendig erfolgen.In practice, dispersion adhesives, glutin glues and hot melt adhesives are used for gluing. The range of use of these adhesive groups is, however, limited, since depending on the type of adhesive, papers which are difficult to bind are no longer bonded with a strength sufficient for use. Volatile portions of the printing ink or the printing ink or components of the surface coating that may have been applied to the contents sheets can migrate from the envelope into the adhesive and reduce its strength. In addition, there is limited flexibility at low temperatures of below - 20 ° C and a decrease in strength at high temperatures of over 80 ° C. The difficulties with the systems mentioned, which work with a single or multi-layer application, can be largely remedied by using one- or two-component PUR melts. However, while two-component systems with the aforementioned roller application systems are still easy to process and master, this no longer applies to the PUR hot-melt adhesive systems that crosslink in the presence of moisture. An improvement can be achieved here by substantially smaller, largely encapsulated application systems, but the fundamental risk of undesired networking remains. For longer breaks, as they can occur when changing formats, changing machines or malfunctions of upstream machines, the application system must either be cleaned or the risk of crosslinking of the adhesive still in the application system must be accepted. Since fully cross-linked PUR hotmelt adhesives are not soluble or meltable, cleaning can only be done mechanically and correspondingly time-consuming.

Aus dem Bereich der Paketbeleimung sind aus der DE-B-12 74 864 und aus der DE-A-19 22 056 auch schon Klebstoffauftragssysteme bekannt, die kontinuierlich oder diskontinuierlich, ausgerüstet mit einer oder mehreren Düsen, Klebstoff auf Breite und Länge begrenzt auf ein Substrat, beispielsweise die Verschlußlasche eines Kartons, aufbringen können. Für diese Auftragssysteme eignen sich sowohl Dispersionsklebstoffe als auch Leime tierischer Herkunft und Schmelzklebstoffe.From the area of package gluing, adhesive application systems are already known from DE-B-12 74 864 and from DE-A-19 22 056, which continuously or discontinuously, equipped with one or more nozzles, limit adhesive to width and length to one Substrate, such as the closure flap of a box, can apply. Dispersion adhesives as well as glues of animal origin and hot melt adhesives are suitable for these application systems.

Ein Klebstoffauftragsverfahren der eingangs genannten Art ist aus der US-A-4 129 471 bekannt. Dabei werden auf Basis von Polyethylen, Polyvinylacetat oder Polyamid hergestellte Heißschmelzklebstoffe auf Umschläge aufgetragen. Derartige Klebstoffe sind mehrfach wärmeaktivierbar. Daher wird entsprechend der US-A-4 129 471 zunächst der Heißschmelzklebstoff auf den Umschlag aufgebracht, und dann irgendwann später in geeigneten Vorrichtungen wieder aktiviert, d.h. schmelzflüssig gemacht, um dann den Umschlag mit den Blättern zu verkleben.An adhesive application method of the type mentioned is known from US-A-4 129 471. Hot melt adhesives based on polyethylene, polyvinyl acetate or polyamide are applied to envelopes. Such adhesives can be heat-activated several times. Therefore, in accordance with US-A-4 129 471, the hot melt adhesive is first applied to the envelope, and then activated again at some time later in suitable devices, i.e. made molten in order to then glue the envelope to the leaves.

Völlig anderer Natur sind aber feuchtigkeitsvernetzende Polyurethan-Heißschmelzklebstoffe. Diese sind nicht mehrfach wieder wärmeaktivierbar, so daß sehr schnell im Anschluß an den Auftrag des Klebstoffes auf einen Umschlag die Verbindung mit den zu verklebenden Seiten erfolgen muß. Feuchtigkeitsvernetzende Polyurethan-Heißschmelzklebstoffe werden bisher mit Verfahren verarbeitet, bei welchen aus einem Tauchbekken der Klebstoff auf eine rotierende Walze übertragen und von dort auf daran vorbeigeführte Buchrücken weitergegeben wird. Hierbei wird der Klebstoff aber nur auf den Buchrücken übertragen und sind sehr dünne Klebstoffschichten nicht zu realisieren. Die bekannten Walzenverfahren haben weiterhin den Nachteil, daß sie bei hohen Geschwindigkeiten zu einem Aufschäumen des Klebstoffs führen und sich im Tauchbecken, aus welchem der Klebstoff auf die Walze übertragen wird, an der Oberfläche des Klebstoffspiegels durch Vernetzung eine Klebstoffhaut bildet.However, moisture-curing polyurethane hot melt adhesives are completely different in nature. These cannot be reactivated heat several times, so that the connection to the sides to be glued must be made very quickly after the adhesive has been applied to an envelope. Moisture-crosslinking polyurethane hotmelt adhesives have so far been processed using processes in which the adhesive is transferred from a dip tank to a rotating roller and from there is passed on to book spines that are guided past it. However, the adhesive is only transferred to the spine of the book and very thin layers of adhesive cannot be realized. The known roller processes also have the disadvantage that they lead to foaming of the adhesive at high speeds and an adhesive skin forms on the surface of the adhesive level by crosslinking in the plunge pool from which the adhesive is transferred to the roller.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, mit dem feuchtigkeitsvernetzende Polyurethan-Heißschmelzklebstoffe in der Buchherstellung zum Rückenbeleimen sowie Seitenbeleimen der Verbindungsfläche von Buchblock und Umschlag problemlos verarbeitet werden können und vor allem wirtschaftlich und störungsfrei aufzutragen sind.The invention has for its object to provide a method with which moisture-curing polyurethane hotmelt adhesives in book production for back gluing and side gluing of the connecting surface of the book block and cover can be processed without problems and above all are economical and trouble-free to apply.

Bei einem Klebstoffauftragsverfahren der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß auf den Umschlag ein feuchtigkeitsvernetzender Polyurethan-Schmelzklebstoff in einer die Buchrückenstärke beiderseits um 0,5 mm übersteigenden Breite mittels einer Schlitzdüse oder einer Mehrlochdüse, insbesondere im Kontaktverfahren, in dünner Schichtstärke von 0,1 mm an aufwärts aufgetragen wird.With an adhesive application method of the type described at the outset, this task becomes Solved according to the invention in that a moisture-crosslinking polyurethane hot-melt adhesive is applied to the cover in a width exceeding the book spine thickness on both sides by 0.5 mm by means of a slot nozzle or a multi-hole nozzle, in particular in the contact process, in a thin layer thickness of 0.1 mm onwards .

Hierdurch wird ein Verfahren geschaffen, mit dem feuchtigkeitsvernetzende Polyurethan-Schmelzklebstoffe wirtschaftlich und störungsfrei auch in relativ dünnen Schichtstärken auf Umschläge aufzutragen sind. Weiterhin wird durch die Aufbringung des Klebstoffes auf den Umschlag erreicht, daß die Auftragsbreite die Buchblockstärke beiderseits, insbesondere um 0,5 - 20 mm, übersteigend derart einzustellen ist, daß mit absoluter Reproduzierbarkeit auch die Randblätter immer vollständig von dem Klebstoff erfaßt werden. Dadurch, daß zum Auftragen des Klebstoffes Düsen verwendet werden, lassen sich mit dem erfindungsgemäßen Verfahren wesentlich höhere Verarbeitungsgeschwindigkeiten erzielen, als mit den bekannten Walzenverfahren.This creates a process by means of which moisture-crosslinking polyurethane hotmelt adhesives can be applied to envelopes economically and without problems, even in relatively thin layers. Furthermore, the application of the adhesive to the cover ensures that the width of the application exceeds the book block thickness on both sides, in particular by 0.5-20 mm, in such a way that the margins are always completely covered by the adhesive with absolute reproducibility. The fact that nozzles are used to apply the adhesive enables the process according to the invention to achieve significantly higher processing speeds than the known roller processes.

Bei sehr leichten Papieren kann der PUR-Schmelzklebstoff in der gesamten Breite in gleicher Dicke aufgetragen werden, da mit relativ dünnen Schichtstärken im Bereich von 1/10 bis 2/10 mm zu arbeiten ist, so daß die durch die Seitenbeleimung entstehende Steigung im Bereich des Buchrückens wenig stört. Das Maß der Störung wird mit zunehmender Dicke des Buchblocks geringer.In the case of very light papers, the PUR hotmelt adhesive can be applied in the entire width in the same thickness, since relatively thin layer thicknesses in the range from 1/10 to 2/10 mm are to be used, so that the slope resulting from the side gluing in the area of Spine little disturbs. The extent of the disturbance decreases with increasing thickness of the book block.

Für dickere und hochvolumige papiere werden als Auftragskopf entweder Schlitzdüsen oder Mehrlochdüsen eingesetzt, die eine Differenzierung in der Auftragsstärke im Bereich von Buchrücken und Seitenbeleimung durch abgestufte Frontflächen bei der Schlitzdüse und durch geringeren Düsenlochdurchmesser im Bereich der Seitenbeleimung bei der Mehrlochdüse erlauben. In diesem Sinne ist es möglich, auch bei dickerem Klebstoffauftrag auf dem Buchrücken eine dünne Seitenbeleimung zu erhalten und die unliebsame Steigung im Bereich des Buchrückens zu vermeiden. Die Düsen für die Seitenbeleimung können auch abgetrenntvon derRückenbeleimung ausgeführt werden, wobei dann jeweils die Auswahl besteht, die Seitenbeleimung auf den Umschlag oder aber auf den Buchrücken aufzubringen. Diese Alternative besteht selbstverständlich auch für den Fall von Schlitzdüsen.For thicker and high-volume papers, either slot nozzles or multi-hole nozzles are used as application heads, which allow a differentiation in the application thickness in the area of book spines and side gluing by means of stepped front surfaces in the slot nozzle and by smaller nozzle hole diameters in the area of side gluing in the multi-hole nozzle. In this sense, it is possible to obtain a thin side glue on the spine even with thicker adhesive application and to avoid the undesirable slope in the area of the book spine. The nozzles for the side gluing can also be carried out separately from the back gluing, in which case there is a choice in each case to apply the side gluing to the cover or to the book spine. Of course, this alternative also exists in the case of slot nozzles.

Es ist ferner zweckmäßig, an der Klebstoffauftragsstelle Wassernebel oder Wasserdampf aufzubringen. Hierdurch wird, insbesondere bei dickeren Klebstoffschichten, die zum Vernetzen notwendige Feuchtigkeit noch effektiver und schneller zugeführt als durch die Eigenfeuchtigkeit des Papiers bzw. die Feuchtigkeit aus der Umgebungsluft. Es empfiehlt sich, den Wassernebel bzw. den Wasserdampf zwischen Klebstoffauftrag und Anlegen an den Umschlag aufzubringen.It is also expedient to apply water mist or water vapor at the adhesive application point. As a result, the moisture required for crosslinking is supplied even more effectively and quickly, in particular in the case of thicker adhesive layers, than through the intrinsic moisture of the paper or the moisture from the ambient air. It is advisable to apply the water mist or water vapor between the adhesive application and application to the envelope.

Ein weiterer wesentlicher Vorteil der Erfindung besteht darin, daß bei zeitlich begrenztem Stillstand des Klebstoffauftragssystems eine merkliche Veränderung des in der Düse weitgehend gegen Außeneinflüsse abgeschlossenen Klebstoffs nicht eintritt. Bei längeren Unterbrechungen und Arbeitsende kann das System durch Abnahme der Düse und Verschließen der Zuführung problemlos vollkommen verschlossen werden. Der zum Reinigen des Düsenkopfes erforderliche Aufwand ist gering gegen die bisher zum Reinigen eines ganzen walzenbestückten Auftragssystems verwendeten Mühen.Another important advantage of the invention is that when the adhesive application system is shut down for a limited time, there is no noticeable change in the adhesive largely sealed in the nozzle against external influences. In the event of longer interruptions and end of work, the system can be completely closed by removing the nozzle and closing the feeder. The effort required to clean the nozzle head is low compared to the efforts previously used to clean an entire roller-mounted application system.

Anhand der schematischen Darstellung von Ausführungsbeispielen werden Einzelheiten der Erfindung erläutert.Details of the invention are explained on the basis of the schematic representation of exemplary embodiments.

Es zeigen:

  • Fig. 1 ein Klebstoffauftragssystem mit einer Schlitzdüse; und
  • Fig. 2 + 3 ein Auftragssystem mit einer Mehrlochdüse.
Show it:
  • 1 shows an adhesive application system with a slot nozzle; and
  • Fig. 2 + 3 an application system with a multi-hole nozzle.

In Fig. 1 und 2 wird ein zum Aufleimen auf den Rücken eines Buchblocks vorgesehener Umschlag insgesamt mit 1 bezeichnet. Der Umschlag 1 besitzt ein inneres Rillungspaar 2, 3 und ein äußeres Rillungspaar 4, 5. Zwischen den inneren Rillungen 2 und 3 wird die Rückenbeleimung 6 vorgesehen, während im Bereich zwischen den Rillungen 2 und 4 bzw. 3 und 5 eine Seitenbeleimung 7 aufgebracht werden kann. Die Rückenbeleimung 6 und die Seitenbeleimung 7 können flächig wie in Fig. 1 oder als getrennte Klebstoffstreifen 8 bzw. 9 wie in Fig. 2 vorgesehen werden.1 and 2, an envelope provided for gluing onto the spine of a book block is designated by 1 in total. The envelope 1 has an inner grooving pair 2, 3 and an outer grooving pair 4, 5. Between the inner grooving 2 and 3 the back gluing 6 is provided, while in the area between the grooving 2 and 4 or 3 and 5 a side gluing 7 is applied can. The back gluing 6 and the side gluing 7 can be provided flat as in FIG. 1 or as separate adhesive strips 8 and 9 as in FIG. 2.

In Fig. 1 wird ein Düsenkopf 10 mit insgesamt mit 11 bezeichneter Schlitzdüse zum Aufbringen von Rückenbeleimung und Seitenbeleimung 6 und 7 vorgesehen. Die Schlitzdüse 11 kann im Kontaktverfahren arbeiten oder den Klebstoff aus einer das Umschlag papier gerade nicht zu berührenden Düse, d.h. über einen kurzen Abstand, auf die jeweilige Fläche 6 bzw. 7 aufbringen. Im Ausführungsbeispiel wird eine Schlitzdüse 11 vorgesehen, die an den für die Seitenbeleimung vorgesehenen Rändern eine Abstufung 12 besitzt, derart, daß der Mittelteil 13 der Schlitzdüse 11 einen dickeren Klebstoffbelag als die Randteile im Bereich der Abstufung 12 liefert. Grundsätzlich kann aber auch eine Schlitzdüse 11 mit überall gleicher Schlitzstärke vorgesehen werden. Diese soll dann so breit sein, daß die Breite des zu beklebenden Buchrückens durch die Rückenbeleimung 6 beiderseits um mindestens 0,5 mm, insbesondere bis zu 2 mm überschritten wird. Dadurch wird - selbst bei fehlender Seitenbeleimung - eine einwandfreie Beleimung auch der Randblätter sichergestellt.In Fig. 1, a nozzle head 10 with a total of 11 designated slot nozzle for applying back gluing and side gluing 6 and 7 is provided. The slot nozzle 11 can work in the contact process or the adhesive from a nozzle not just touching the envelope paper, i.e. Apply to the respective surface 6 or 7 over a short distance. In the exemplary embodiment, a slot nozzle 11 is provided which has a gradation 12 on the edges provided for the side gluing, such that the central part 13 of the slot nozzle 11 provides a thicker adhesive coating than the edge parts in the area of the gradation 12. Basically, however, a slot nozzle 11 can be provided with the same slot thickness everywhere. This should then be so wide that the width of the spine to be glued is exceeded by the back gluing 6 on both sides by at least 0.5 mm, in particular up to 2 mm. This ensures - even in the absence of side gluing - perfect gluing of the margins as well.

Das Ausführungsbeispiel nach Fig. 2 zeigt einen Düsenkopf 14 mit einer insgesamt mit 15 bezeichneten Mehrlochdüse. Als Lochabstände der Mehrlochdüse 15 können Beträge von 0,5 bis 5 mm sowohl im Bereich der Rückenbeleimung als auch der Seitenbeleimung 7 vorgesehen werden. Auch in diesem Fall wird zweckmäßig - selbst bei Wegfall ein er eigentlichen Seitenbel'eimung - eine Rückenbeleimung 6 aufgebracht, die um etwa 0,5 bis 2 mm breiter als der zu beklebende Buchrücken ist, um die jeweiligen Randblätter sicher zu erfassen.The exemplary embodiment according to FIG. 2 shows a nozzle head 14 with a multi-hole nozzle, designated overall by 15. Amounts of 0.5 to 5 mm can be provided as hole spacing of the multi-hole nozzle 15 both in the area of the back gluing and the side gluing 7. In this case as well - even if there is no actual side gluing - a back gluing 6 is applied, which is about 0.5 to 2 mm wider than the book spine to be glued in order to reliably grasp the respective margins.

Bei Ausbildung der Mehrlochdüse 15 des Düsenkopfes 14 nach Fig. 2 sowohl für eine Rückenbeleimung 6 als auch für eine Seitenbeleimung 7 kann es günstig sein, die Düsenlochdurchmesser im Bereich der Seitenbeleimung 7 dem gewünschten Unterschied der Klebstoffauftragsstärke entsprechend kleiner als im Bereich der Rückenbeleimung 6 zu wählen. Im Ausführungsbeispiel sind die Klebstoffstreifen 9 im Bereich der Seitenbeleimung 7 deutlich schmaler als die Klebstoffstreifen 8 im Bereich der Rückenbeleimung 6.When designing the multi-hole nozzle 15 of the nozzle head 14 according to FIG. 2, both for back gluing 6 and for side gluing 7, it may be advantageous to choose the nozzle hole diameter in the area of the side gluing 7 to be smaller than the desired difference in adhesive thickness than in the area of the back gluing 6 . In the exemplary embodiment, the adhesive strips 9 in the area of the side gluing 7 are significantly narrower than the adhesive strips 8 in the area of the back gluing 6.

In den Ausführungsbeispielen nach Fig. 1 und 2 wird bei Betrieb entweder der Düsenkopf 10 bzw. 14in Pfeilrichtung 16 relativ zum Umschlag 1 oder aber der Umschlag 1 in Pfeilrichtung 16 relativ zum Düsenkopf 10 bzw. 14 bewegt.In the exemplary embodiments according to FIGS. 1 and 2, either the nozzle head 10 or 14 is moved in the arrow direction 16 relative to the envelope 1 or the envelope 1 in the arrow direction 16 relative to the nozzle head 10 or 14 during operation.

Wenn die Seitenbeleimung nicht auf den Umschlag sondern unmittelbar auf den Buchblock 18 aufgebracht werden soll, sind hierzu übliche Schlitzdüsen oder Lochdüsen (19, 20) einzusetzen. Walzenauftragssysteme sind auch in diesem Fall nicht empfehlenswert, wenn feuchtigkeitsvernetzende PUR-Klebstoffsysteme verwendet werden.If the side gluing is not to be applied to the cover but directly to the book block 18, customary slot nozzles or perforated nozzles (19, 20) should be used for this. Roller application systems are also not recommended in this case if moisture-curing PUR adhesive systems are used.

BezugszeichenlisteReference symbol list

  • 1 = Umschlag1 = envelope
  • 2,3 = innere Rillungen2,3 = internal creasing
  • 4, 5 = äußere Rillungen4, 5 = outer creases
  • 6 = Rückenbeleimung6 = back gluing
  • 7 = Seitenbeleimung7 = side gluing
  • 8, 9 = Klebstoffstreifen8, 9 = adhesive strips
  • 10 = Düsenkopf (Fig. 1)10 = nozzle head (Fig. 1)
  • 11 = Schlitzdüse11 = slot nozzle
  • 12 = Abstufung12 = gradation
  • 13 = Mittelteil (11)13 = middle part (11)
  • 14 = Düsenkopf (Fig. 2)14 = nozzle head (Fig. 2)
  • 15 = Mehrlochdüse15 = multi-hole nozzle
  • 16 = Pfeilrichtung16 = arrow direction
  • 17 = Pfeilrichtung17 = arrow direction

Claims (8)

1. Method of applying an adhesive substance in the production of books during the connection of book block and cover (1) with the use of a hot- fusion adhesive substance to be applied onto the cover, wherein a lateral glue-coating (7) is applied onto the cover (1) preferably simultaneously with the glue-coating (6) for the book spine, characterised thereby, that a moisture-crosslinking polyurethane fusion adhesive substance is applied onto the cover (1) in a thin layer thickness upwards from 0.1 millimetres over a width exceeding the book spine thickness by 0.5 millimetres at both sides by means of a slot nozzle (11) or a multi-hole nozzle (15), particularly in the contact method.
2. Method according to claim 1, characterised thereby, that the ratio of the adhesive substance thickness of the lateral glue-coating (7) to that of the spine glue-coating (6) is preset in accordance with the book thickness and the sheet thickness.
3. Method according to one of the preceding claims, characterised thereby, that the spine glue-coating (6) of the book block is applied directly onto the cover (1), but the lateral glue-coating is applied directly onto the book block.
4. Method according to one of the preceding claims, characterised thereby, that the lateral glue-coating is carried out with the aid of slot nozzles separate from the slot nozzle (11) associated with the spine glue-coating (6).
5. Method according to one of the preceding claims, characterised thereby, that in the case of a multi-hole nozzle (15), like individual nozzles are provided everywhere with hole spacings of 0.5 to 5 millimetres over the entire width of the spine glue-coating (6) and the lateral glue-coating (7).
6. Method according to one of the preceding claims, characterised thereby, that the hole diameters of the individual nozzles of the multi-hole nozzle (15) in the region of the lateral glue-coating (7) are smaller in the sense of the desired thickness of application than the hole diameters of the individual nozzles of the multi-hole nozzle (15) in the region of the spine glue-coating (6).
7. Method according to one of the preceding claims, characterised thereby, that one applies water mist orwatervapour atthe place of application of the adhesive substance.
8. Method according to claim 7, characterised thereby, that the mist is applied between application of the adhesive substance and laying against the cover.
EP19860906322 1985-11-02 1986-10-25 Adhesive application process Expired - Lifetime EP0245325B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86906322T ATE58677T1 (en) 1985-11-02 1986-10-25 ADHESIVE APPLICATION PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853538897 DE3538897A1 (en) 1985-11-02 1985-11-02 ADHESIVE ORDER PROCESS
DE3538897 1985-11-02

Publications (2)

Publication Number Publication Date
EP0245325A1 EP0245325A1 (en) 1987-11-19
EP0245325B1 true EP0245325B1 (en) 1990-11-28

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EP19860906322 Expired - Lifetime EP0245325B1 (en) 1985-11-02 1986-10-25 Adhesive application process

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US (1) US4984949A (en)
EP (1) EP0245325B1 (en)
JP (1) JPH01501610A (en)
DE (2) DE3538897A1 (en)
WO (1) WO1987002624A1 (en)

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US5418009A (en) * 1992-07-08 1995-05-23 Nordson Corporation Apparatus and methods for intermittently applying discrete adhesive coatings
WO1994001222A1 (en) * 1992-07-08 1994-01-20 Nordson Corporation Apparatus and methods for applying discrete foam coatings
DE69317706T2 (en) * 1992-07-08 1998-07-30 Nordson Corp Apparatus and method for applying discontinuous coatings
CA2098784A1 (en) * 1992-07-08 1994-01-09 Bentley Boger Apparatus and methods for applying conformal coatings to electronic circuit boards
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Also Published As

Publication number Publication date
US4984949A (en) 1991-01-15
DE3675937D1 (en) 1991-01-10
WO1987002624A1 (en) 1987-05-07
JPH01501610A (en) 1989-06-08
DE3538897A1 (en) 1987-05-07
EP0245325A1 (en) 1987-11-19

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