EP0983829A1 - Method and apparatus for gluing strips of veneer - Google Patents
Method and apparatus for gluing strips of veneer Download PDFInfo
- Publication number
- EP0983829A1 EP0983829A1 EP98116423A EP98116423A EP0983829A1 EP 0983829 A1 EP0983829 A1 EP 0983829A1 EP 98116423 A EP98116423 A EP 98116423A EP 98116423 A EP98116423 A EP 98116423A EP 0983829 A1 EP0983829 A1 EP 0983829A1
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- EP
- European Patent Office
- Prior art keywords
- adhesive
- veneer
- curing
- veneer strips
- strips
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/10—Butting blanks of veneer; Joining same along edges; Preparatory processing of edges, e.g. cutting
Definitions
- the invention relates to a method and a device for gluing veneer strips on their butt edge.
- butt glue is essentially PVAc or urea glue used by means of reactive processes or active processes be glued.
- the veneer edges are previously on Veneer package in a first process step with adhesive provided that dries in the air.
- adhesive provided that dries in the air.
- the veneers are actually glued in an additional step.
- the adhesive is used for gluing reactivated by exposure to heat and the veneer edges pressed together.
- the curing of the PVAc adhesives and urea glue takes place under the influence of pressure and Heat by removing water and polymerizing. With urea glues a longer pressure and heat zone is required.
- the hardened urea joint can be contrasted Do not soften or reactivate the PVAc joint.
- Disadvantageous Reactive experience means effort and time for the additional step for pre-gluing, the corresponding machines and procedures pulls.
- the veneer edges are directly in the Longitudinal joint gluing machine immediately before merging glued in the heating and pressure zone.
- a problem The active process for PVAc adhesives is that the adhesive has to go through a longer printing and cooling section must to achieve a fast turnaround time and on End up being cured too. Also with urea adhesives long heating distances are required for heat transfer. This leads to long machines for veneer gluing and especially for a partial drying of the veneers, because due to the heat transfer not only the adhesive joints, but also the areas around the joints are also heated. This partial drying leads to tension in the veneer strips, which is a direct sticking together of a multitude of veneer strips makes it very difficult.
- EP-0 403 024 describes a method and a device Known for gluing layers of wood together with the glue is applied, the layers are brought together and then curing the adhesive in at least three steps. The is carried out at three curing points Curing by means of a printhead, each Apply pressure and heat from above and below to the adhesive joint and allow the adhesive joint to harden gradually. Curing takes place, for example, by high-frequency gluing.
- EP-0 403 024 is used for side compression the adhesive edges of the layers and that The adhesive cures one after the other. First they are Butt edges merged and then the glue cured by means of the printheads, the printheads Only apply pressure from above or below. This requires additional Process steps and a complex gluing machine with large dimensions in the longitudinal direction. It is also not possible to apply heat specifically to the adhesive joint, but heat is also on the side veneer areas transfer, resulting in the voltages described above in the veneers.
- the invention has for its object a method or to create a device which is simple and economical gluing of veneer strips to your Allow butt edge.
- the compression takes place the veneer strips on the butt edges at the same time as the Hardening of the adhesive by means of electromagnetic waves.
- the method according to the invention is characterized by this a number of advantages. By squeezing at the same time and curing the adhesive joint becomes very small kept so that the adhesive joint is extremely inconspicuous. There curing takes place by means of electromagnetic waves, can target the energy required for curing in a targeted and contactless manner be introduced into the adhesive joint. Thereby can control the curing of the adhesive very well become. A drying of the areas of the veneer near the joints does not or only finds through the electromagnetic waves very little instead, so that none in the veneer strips Tension arises from dried veneer sections.
- Electromagnetic waves are preferably used, which in Vacuum have a length of less than 10 cm. By the simultaneous compression and curing is reduced also the necessary number of work steps and the economy the procedure is increased. By using it Electromagnetic waves are also eliminated, e.g. at heat transfer by means of heating rails Problems with drying areas close to joints or with impressions heating rails on veneers or smearing of heating rails or other components by still not set adhesive.
- the adhesive is preferably cured by means of microwaves with a wavelength range in a vacuum of 10 cm up to 1 mm. This also makes today's bonding used urea glues possible.
- microwaves can target a high energy density in a targeted and contactless manner the glue line is inserted. Through the microwaves only dipoles vibrated, the vibration is converted into heat by friction and to harden the Leads adhesive. Due to the high energy density of microwaves the curing time of the adhesives is reduced and the Processing times for gluing the veneer strips can be reduced.
- An adhesive is preferred for curing by means of microwaves used, which is essentially made up with water Is a condensation product.
- a Resin consisting of urea and formaldehyde is used become.
- the adhesive is preferably dried and hardened in one operation, with the transition between drying and hardening is fluent. It is also possible to use electromagnetic Waves in the reactive process in the first Use the glue drying step.
- Another advantageous embodiment of the invention results themselves when using ultraviolet radiation Hardening that is in a vacuum between 4000 ⁇ and 100 ⁇ . Even with this electromagnetic radiation there are advantages of bringing a high Energy density that is non-contact and targeted in the adhesive joint can be introduced. For example, if a for ultraviolet radiation sensitive adhesive through a cover (e.g. a glass pane) protected, can be practical Realize infinitely long pot lives.
- a cover e.g. a glass pane
- Another significant advantage of the invention is that if the ultraviolet radiation using an eximer lamp is produced. Because the eximer heater is only ultraviolet Generates radiation, the adhesive can work without the influence of Heat on adhesive joint or veneer. In order to cannot create any tension on the veneer caused by heat arise.
- An adhesive for ultraviolet rays is advantageous sensitized glue based on polyurethane.
- different Radiations can be used to harden the adhesive.
- Correspondingly sensitized adhesives can e.g. by Irradiation using laser light, UV light or gamma rays be hardened.
- Glue or type of radiation is used depending on the type of veneer or the nature of the base material, to which the veneer is applied.
- a device according to the invention for gluing veneer strips at its butt edge is characterized in that a production device in a curing unit of electromagnetic waves and means of compression the veneer strip includes.
- the device and the Means are arranged so that the veneer strips on the glued joint side are pressed together and the adhesive simultaneously by means of electromagnetic Waves is cured.
- electromagnetic Waves are used that are one wavelength in vacuum of less than 10 cm. Will such Shafts used can vary the length of the curing unit should be kept small as the time for the adhesive to harden is significantly reduced.
- the adhesive unit advantageously comprises a rotating disk, with which the adhesive simply and dosed onto the veneer edges can be applied.
- the device of the curing unit preferably generates microwaves, with a wavelength in a vacuum between 10 cm and 1 mm.
- the microwaves have a high energy density that are introduced into the adhesive joint in a targeted and contactless manner can be.
- the microwaves can e.g. by Magnetrons are generated.
- the device generates the curing unit ultraviolet radiation with a wavelength in the range between 4000 ⁇ and 100 ⁇ . This can the energy required for curing is also targeted and be introduced without contact.
- the only figure shows a highly schematic representation a device according to the invention.
- a device according to the invention shown in the figure comprises a feed unit 1, an adhesive unit 2 and a Curing unit 3.
- the individual veneer strips are through the feed unit 1 fed to the adhesive unit 2.
- This can e.g. by means of driven Rollers or other suitable transport equipment respectively.
- the adhesive unit 2 is at least an adhesive is applied to a joint edge of the veneer. This is done, for example, with a rotating one Disc that picks up adhesive from a reservoir and it partially applied to a veneer edge.
- the curing unit 3 includes means for compressing the strips of veneer and a device for generating electromagnetic waves.
- the veneer strips are fed into the curing unit 3 and compressed by the means at their abutting edges.
- the adhesive is preferred cured by means of microwaves or UV radiation.
- this can also be done method according to the invention are carried out. After application of the adhesive on the butt edge of the veneer strips the veneer strips pressed together at their butt edge and the adhesive at the same time preferably by means of microwaves or cured ultraviolet radiation.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Verkleben von Furnierstreifen an ihrer Stoßkante.The invention relates to a method and a device for gluing veneer strips on their butt edge.
Es sind verschiedene Verfahren und Vorrichtungen zum Verkleben von Furnierstreifen bekannt. Beispielsweise kommen bei der Stumpfverleimung im wesentlichen PVAc- oder Harnstoffleime zum Einsatz, die mittels Reaktivverfahren bzw. Aktivverfahren verklebt werden.There are various methods and devices for gluing known from veneer strips. For example, come with the butt glue is essentially PVAc or urea glue used by means of reactive processes or active processes be glued.
Beim Reaktivverfahren werden die Furnierkanten vorher am Furnierpaket in einem ersten Verfahrensschritt mit Klebstoff versehen, der an der Luft trocknet. Je nach Art des Klebstoffs und der Klebstoffzusammensetzung können die Furniere mehrere Stunden bis Tage zum Antrocknen der Leimfuge gelagert werden. Die eigentliche Verklebung der Furniere erfolgt in einem zusätzlichen Schritt. Zur Verklebung wird der Klebstoff durch Wärmeeinwirkung reaktiviert und die Furnierkanten aneinandergedrückt. Das Aushärten der PVAc-Klebstoffe und Harnstoffleime erfolgt unter Einwirkung von Druck und Wärme durch Entzug des Wassers und Polymerisation. Bei Harnstoffleimen ist eine längere Druck- und Wärmezone erforderlich. Die ausgehärtete Harnstofffuge läßt sich im Gegensatz zur PVAc-Fuge nicht mehr erweichen oder reaktivieren. Nachteilig am Reaktiverfahren ist der Aufwand und der Zeitbedarf für den zusätzlichen Arbeitsschritt für das Vorbeleimen, der entsprechende Maschinen und Verfahrensabläufe nach sich zieht.In the reactive process, the veneer edges are previously on Veneer package in a first process step with adhesive provided that dries in the air. Depending on the type of adhesive and the adhesive composition, the veneers stored for several hours to days to dry the glue joint become. The veneers are actually glued in an additional step. The adhesive is used for gluing reactivated by exposure to heat and the veneer edges pressed together. The curing of the PVAc adhesives and urea glue takes place under the influence of pressure and Heat by removing water and polymerizing. With urea glues a longer pressure and heat zone is required. The hardened urea joint can be contrasted Do not soften or reactivate the PVAc joint. Disadvantageous Reactive experience means effort and time for the additional step for pre-gluing, the corresponding machines and procedures pulls.
Beim Aktivverfahren werden die Furnierkanten direkt in der Längsfugenverleimmaschine unmittelbar vor der Zusammenführung in Heiz- und Druckzone beleimt. Eine Schwierigkeit des Aktivverfahrens bei PVAc-Klebstoffen liegt darin, daß der Klebstoff eine längere Druck- und Kühlstrecke durchlaufen muß, um eine schnelle Durchlaufzeit zu erreichen und am Ende auch ausgehärtet zu sein. Auch bei Harnstoffklebern werden lange Heizstrecken für die Wärmeübertragung benötigt. Dies führt zu langen Maschinen für die Furnierverklebung und insbesondere zu einer partiellen Trocknung der Furniere, da durch die Wärmeübertragung nicht nur die Klebefugen, sondern auch die Bereiche um die Fugen herum erwärmt werden. Diese partiellen Trocknungen führen zu Spannungen in den Furnierstreifen, die ein unmittelbares Aneinanderkleben einer Vielzahl von Furnierstreifen sehr schwierig macht.In the active process, the veneer edges are directly in the Longitudinal joint gluing machine immediately before merging glued in the heating and pressure zone. A problem The active process for PVAc adhesives is that the adhesive has to go through a longer printing and cooling section must to achieve a fast turnaround time and on End up being cured too. Also with urea adhesives long heating distances are required for heat transfer. This leads to long machines for veneer gluing and especially for a partial drying of the veneers, because due to the heat transfer not only the adhesive joints, but also the areas around the joints are also heated. This partial drying leads to tension in the veneer strips, which is a direct sticking together of a multitude of veneer strips makes it very difficult.
Aus der EP-0 403 024 ist ein Verfahren und eine Vorrichtung zum Zusammenkleben von Lagen aus Holz bekannt, bei dem Klebstoff aufgebracht wird, die Lagen zusammen gebracht werden und anschließend das Aushärten des Klebstoffs in mindestens drei Schritten erfolgt. An drei Aushärtestellen erfolgt die Aushärtung mittels jeweils eines Druckkopfes, die jeweils Druck und Wärme von oben und unten auf die Klebefuge ausüben und so die Klebefuge jeweils schrittweise aushärten lassen. Das Aushärten geschieht beispielsweise durch Hochfrequenzkleben.EP-0 403 024 describes a method and a device Known for gluing layers of wood together with the glue is applied, the layers are brought together and then curing the adhesive in at least three steps. The is carried out at three curing points Curing by means of a printhead, each Apply pressure and heat from above and below to the adhesive joint and allow the adhesive joint to harden gradually. Curing takes place, for example, by high-frequency gluing.
Bei der EP-0 403 024 erfolgt das seitliche Zusammendrücken der mit Klebstoff versehenen Stoßkanten der Lagen und das Aushärten des Klebstoffs nacheinander. Zuerst werden die Stoßkanten zusammengeführt und dann wird der Klebstoff mittels der Druckköpfe ausgehärtet, wobei die Druckköpfe Druck nur von oben bzw. unten ausüben. Dies erfordert zusätzliche Verfahrensschritte und eine aufwendige Klebemaschine mit großen Abmessungen in Längsrichtung. Es ist auch nicht möglich, Wärme gezielt in die Klebefuge einzubringen, sondern Wärme wird auch auf die seitlichen Furnierbereiche übertragen, was zu den oben beschriebenen Spannungen in den Furnieren führen kann.EP-0 403 024 is used for side compression the adhesive edges of the layers and that The adhesive cures one after the other. First they are Butt edges merged and then the glue cured by means of the printheads, the printheads Only apply pressure from above or below. This requires additional Process steps and a complex gluing machine with large dimensions in the longitudinal direction. It is also not possible to apply heat specifically to the adhesive joint, but heat is also on the side veneer areas transfer, resulting in the voltages described above in the veneers.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bzw. eine Vorrichtung zu schaffen, welche ein einfaches und wirtschaftliches Verkleben von Furnierstreifen an ihrer Stoßkante ermöglichen.The invention has for its object a method or to create a device which is simple and economical gluing of veneer strips to your Allow butt edge.
Die Aufgabe wird erfindungsgemäß durch ein Verfahren mit den
Merkmalen des Anspruchs 1 bzw. eine Vorrichtung mit den
Merkmalen des Anspruchs 10 gelöst. Vorteilhafte Weiterbildungen
der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by a method with the
Features of
Beim erfindungsgemäßen Verfahren erfolgt das Zusammendrücken der Furnierstreifen an den Stoßkanten gleichzeitig mit dem Aushärten des Klebstoffs mittels elektromagnetischer Wellen. Dadurch zeichnet sich das erfindungsgemäße Verfahren durch eine Reihe von Vorteilen aus. Durch das gleichzeitige Zusammendrücken und Aushärten wird die Klebefuge sehr klein gehalten, so daß die Klebefuge äußerst unauffällig ist. Da das Aushärten mittels elektromagnetischer Wellen erfolgt, kann die zum Aushärten notwendige Energie gezielt und berührungslos in die Klebefuge eingebracht werden. Dadurch kann das Aushärten des Klebstoffs sehr gut kontrolliert werden. Ein Trocknen der fugennahen Bereiche des Furniers findet durch die elektromagnetischen Wellen nicht oder nur sehr wenig statt, so daß in den Furnierstreifen keine Spannungen durch getrocknete Furnierabschnitte entstehen. Bevorzugt werden elektromagnetische Wellen verwendet, die im Vakuum eine Länge von kleiner als 10 cm aufweisen. Durch das gleichzeitige Zusammendrücken und Aushärten verringert sich auch die notwendige Zahl an Arbeitsschritten und die Wirtschaftlichkeit des Verfahrens wird erhöht. Durch die Verwendung elektromagnetischer Wellen entfallen auch die z.B. bei einer Wärmeübertragung mittels Heizschienen auftretenden Probleme des Trocknens fugennaher Bereiche oder von Abdrücken der Heizschienen auf den Furnieren oder dem Verschmieren von Heizschienen oder anderen Bauteilen durch noch nicht abgebundenen Klebstoff.In the method according to the invention, the compression takes place the veneer strips on the butt edges at the same time as the Hardening of the adhesive by means of electromagnetic waves. The method according to the invention is characterized by this a number of advantages. By squeezing at the same time and curing the adhesive joint becomes very small kept so that the adhesive joint is extremely inconspicuous. There curing takes place by means of electromagnetic waves, can target the energy required for curing in a targeted and contactless manner be introduced into the adhesive joint. Thereby can control the curing of the adhesive very well become. A drying of the areas of the veneer near the joints does not or only finds through the electromagnetic waves very little instead, so that none in the veneer strips Tension arises from dried veneer sections. Electromagnetic waves are preferably used, which in Vacuum have a length of less than 10 cm. By the simultaneous compression and curing is reduced also the necessary number of work steps and the economy the procedure is increased. By using it Electromagnetic waves are also eliminated, e.g. at heat transfer by means of heating rails Problems with drying areas close to joints or with impressions heating rails on veneers or smearing of heating rails or other components by still not set adhesive.
Vorzugsweise erfolgt das Härten des Klebstoffs mittels Mikrowellen mit einem Wellenlängenbereich im Vakuum von 10 cm bis 1 mm. Dadurch wird auch die Verklebung von heutzutage verwendeten Harnstoffleimen möglich. Mittels der Mikrowellen kann eine hohe Energiedichte gezielt und berührungslos in die Klebefuge eingebracht werden. Durch die Mikrowellen werden nur Dipole in Schwingung versetzt, wobei die Schwingung durch Reibung in Wärme umgesetzt wird und zum Aushärten des Klebstoffs führt. Durch die hohe Energiedichte der Mikrowellen wird die Aushärtezeit der Klebstoffe geringer und die Durchlaufzeiten für das Verkleben der Furnierstreifen können verringert werden.The adhesive is preferably cured by means of microwaves with a wavelength range in a vacuum of 10 cm up to 1 mm. This also makes today's bonding used urea glues possible. By means of the microwaves can target a high energy density in a targeted and contactless manner the glue line is inserted. Through the microwaves only dipoles vibrated, the vibration is converted into heat by friction and to harden the Leads adhesive. Due to the high energy density of microwaves the curing time of the adhesives is reduced and the Processing times for gluing the veneer strips can be reduced.
Bevorzugt wird für die Härtung mittels Mikrowellen ein Klebstoff verwendet, der ein im wesentlichen mit Wasser angesetztes Kondensationsprodukt ist. Beispielsweise kann ein aus Harnstoff und Formaldehyd bestehendes Harz verwendet werden.An adhesive is preferred for curing by means of microwaves used, which is essentially made up with water Is a condensation product. For example, a Resin consisting of urea and formaldehyde is used become.
Als Klebstoff können aber z.B. auch Leime, welche Moleküle mit Dipolen aufweisen, verwendet werden.However, e.g. also glues, what molecules with dipoles can be used.
Vorzugsweise erfolgt das Trocknen und Härten des Klebstoffs in einem Arbeitsgang, wobei der Übergang zwischen Trocknen und Härten fließend ist. Ebenso ist es möglich, die elektromagnetischen Wellen beim Reaktivverfahren im ersten Trocknungsschritt des Klebstoffs zu verwenden.The adhesive is preferably dried and hardened in one operation, with the transition between drying and hardening is fluent. It is also possible to use electromagnetic Waves in the reactive process in the first Use the glue drying step.
Eine weitere vorteilhafte Ausgestaltung der Erfindung ergibt sich bei der Verwendung von ultravioletter Strahlung zur Härtung, die im Vakuum eine Wellenlänge zwischen 4000 Å und 100 Å aufweist. Auch bei dieser elektromagnetischen Strahlung ergeben sich die Vorteile des Einbringens einer hohen Energiedichte, die berührungslos und gezielt in die Klebefuge eingebracht werden kann. Wird beispielsweise ein für ultraviolette Strahlung sensibler Klebstoff durch eine Abdeckung (z.B. eine Glasscheibe) geschützt, lassen sich praktisch unendlich lange Topfzeiten realisieren.Another advantageous embodiment of the invention results themselves when using ultraviolet radiation Hardening that is in a vacuum between 4000 Å and 100 Å. Even with this electromagnetic radiation there are advantages of bringing a high Energy density that is non-contact and targeted in the adhesive joint can be introduced. For example, if a for ultraviolet radiation sensitive adhesive through a cover (e.g. a glass pane) protected, can be practical Realize infinitely long pot lives.
Ein weiterer wesentlicher Vorteil der Erfindung ergibt sich, wenn die ultraviolette Strahlung mittels eines Eximerstrahlers erzeugt wird. Da der Eximerstrahler nur ultraviolette Strahlung erzeugt, kann der Klebstoff ohne Einwirkung von Wärme auf Klebstofffuge bzw. Furnier gehärtet werden. Damit können keine durch Wärme verursachten Spannungen an den Furnierstücken entstehen.Another significant advantage of the invention is that if the ultraviolet radiation using an eximer lamp is produced. Because the eximer heater is only ultraviolet Generates radiation, the adhesive can work without the influence of Heat on adhesive joint or veneer. In order to cannot create any tension on the veneer caused by heat arise.
Vorteilhaft ist als Klebstoff ein für ultraviolette Strahlen sensibilisierter Leim auf Polyurethan-Basis.An adhesive for ultraviolet rays is advantageous sensitized glue based on polyurethane.
Je nach Beschaffenheit des Klebstoffs können verschiedene Strahlungen zur Härtung des Klebstoffs verwendet werden. Entsprechend sensibilisierte Klebstoffe können z.B. durch Bestrahlung mittels Laser-Licht, UV-Licht oder Gammastrahlen gehärtet werden. Klebstoff bzw. Art der Strahlung wird dabei je nach Furnierart bzw. Beschaffenheit des Trägermaterials, auf das das Furnier aufgebracht wird, ausgewählt.Depending on the nature of the adhesive, different Radiations can be used to harden the adhesive. Correspondingly sensitized adhesives can e.g. by Irradiation using laser light, UV light or gamma rays be hardened. Glue or type of radiation is used depending on the type of veneer or the nature of the base material, to which the veneer is applied.
Eine erfindungsgemäße Vorrichtung zum Verkleben von Furnierstreifen an ihrer Stoßkante zeichnet sich dadurch aus, daß sie in einer Aushärteinheit eine Vorrichtung zur Erzeugung von elektromagnetischen Wellen und Mittel zum Zusammendrücken der Furnierstreifen umfaßt. Die Vorrichtung und die Mittel sind derart angeordnet, daß die Furnierstreifen an der mit Klebstoff versehenen Stoßseite zusammengedrückt werden und der Klebstoff gleichzeitig mittels elektromagnetischer Wellen ausgehärtet wird. Dazu können z.B. elektromagnetische Wellen verwendet werden, die im Vakuum eine Wellenlänge von kleiner als 10 cm aufweisen. Werden derartige Wellen verwendet, kann die Baulänge der Aushärteinheit sehr klein gehalten werden, da die Zeit zum Aushärten des Klebstoffs deutlich verringert ist.A device according to the invention for gluing veneer strips at its butt edge is characterized in that a production device in a curing unit of electromagnetic waves and means of compression the veneer strip includes. The device and the Means are arranged so that the veneer strips on the glued joint side are pressed together and the adhesive simultaneously by means of electromagnetic Waves is cured. For this, e.g. electromagnetic Waves are used that are one wavelength in vacuum of less than 10 cm. Will such Shafts used can vary the length of the curing unit should be kept small as the time for the adhesive to harden is significantly reduced.
Vorteilhaft umfaßt die Klebeeinheit eine rotierende Scheibe, mit der der Klebstoff einfach und dosiert auf die Furnierkanten aufgetragen werden kann. The adhesive unit advantageously comprises a rotating disk, with which the adhesive simply and dosed onto the veneer edges can be applied.
Vorzugsweise erzeugt die Vorrichtung der Aushärteinheit Mikrowellen, mit einer Wellenlänge im Vakuum zwischen 10 cm und 1 mm. Die Mikrowellen weisen eine hohe Energiedichte auf, die gezielt und berührungslos in die Klebstofffuge eingebracht werden kann. Die Mikrowellen können z.B. durch Magnetrone erzeugt werden.The device of the curing unit preferably generates microwaves, with a wavelength in a vacuum between 10 cm and 1 mm. The microwaves have a high energy density that are introduced into the adhesive joint in a targeted and contactless manner can be. The microwaves can e.g. by Magnetrons are generated.
In einer vorteilhaften Ausgestaltung erzeugt die Vorrichtung der Aushärteeinheit ultraviolette Strahlung mit einer Wellenlänge im Bereich zwischen 4000 Å und 100 Å. Dadurch kann die zum Aushärten benötigte Energie ebenfalls gezielt und berührungslos eingebracht werden.In an advantageous embodiment, the device generates the curing unit ultraviolet radiation with a wavelength in the range between 4000 Å and 100 Å. This can the energy required for curing is also targeted and be introduced without contact.
Im folgenden wird ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung und des erfindungsgemäßen Verfahrens mit Bezug auf die beigefügte Zeichnung beschrieben.The following is an embodiment of the invention Device and the method according to the invention Described with reference to the accompanying drawing.
Es zeigt die einzige Figur eine stark schematisierte Darstellung einer erfindungsgemäßen Vorrichtung.The only figure shows a highly schematic representation a device according to the invention.
Eine in der Figur dargestellte erfindungsgemäße Vorrichtung
umfaßt eine Zuführeinheit 1, eine Klebeeinheit 2 und eine
Aushärteinheit 3.A device according to the invention shown in the figure
comprises a
Die einzelnen Furnierstreifen werden durch die Zuführeinheit
1 zur Klebeeinheit 2 zugeführt. Dies kann z.B. mittels angetriebener
Rollen oder einer anderen geeigneten Transporteinrichtung
erfolgen. In der Klebeeinheit 2 wird an mindestens
einer Stoßkante des Furniers ein Klebstoff aufgetragen.
Dies erfolgt beispielsweise mit einer sich drehenden
Scheibe, die Klebstoff aus einem Reservoir aufnimmt und ihn
teilweise auf eine Furnierkante aufträgt.The individual veneer strips are through the
Nach Auftragen des Klebstoffs werden die Furnierstreifen
weiter zur Aushärteeinheit 3 transportiert. Die Aushärteinheit
3 umfaßt Mittel zum Zusammendrücken der Furnierstreifen
und eine Vorrichtung zur Erzeugung elektromagnetischer Wellen.
Die Furnierstreifen werden in die Aushärteeinheit 3 zugeführt
und durch die Mittel an ihren Stoßkanten zusammengedrückt.
Gleichzeitig wird der Klebstoff vorzugsweise
mittels Mikrowellen oder UV-Strahlung ausgehärtet.After applying the adhesive, the veneer strips
transported to the
Mittels der oben beschriebenen Vorrichtung kann auch das erfindungsgemäße Verfahren ausgeführt werden. Nach Auftragen des Klebstoffs auf die Stoßkante der Furnierstreifen werden die Furnierstreifen an ihrer Stoßkante zusammengedrückt und der Klebstoff gleichzeitig vorzugsweise mittels Mikrowellen oder ultravioletter Strahlung ausgehärtet.Using the device described above, this can also be done method according to the invention are carried out. After application of the adhesive on the butt edge of the veneer strips the veneer strips pressed together at their butt edge and the adhesive at the same time preferably by means of microwaves or cured ultraviolet radiation.
Claims (12)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737593A DE19737593C1 (en) | 1997-08-28 | 1997-08-28 | Joining wood veneer strips at their edges and process equipment |
| DK98116423T DK0983829T3 (en) | 1997-08-28 | 1998-08-31 | Method and apparatus for gluing veneer strips |
| ES98116423T ES2264807T3 (en) | 1997-08-28 | 1998-08-31 | PROCEDURE AND DEVICE FOR STRIPPING WOODEN FLAG BANDS. |
| EP98116423A EP0983829B1 (en) | 1997-08-28 | 1998-08-31 | Method and apparatus for gluing strips of veneer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737593A DE19737593C1 (en) | 1997-08-28 | 1997-08-28 | Joining wood veneer strips at their edges and process equipment |
| EP98116423A EP0983829B1 (en) | 1997-08-28 | 1998-08-31 | Method and apparatus for gluing strips of veneer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0983829A1 true EP0983829A1 (en) | 2000-03-08 |
| EP0983829B1 EP0983829B1 (en) | 2006-06-07 |
Family
ID=26039531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98116423A Expired - Lifetime EP0983829B1 (en) | 1997-08-28 | 1998-08-31 | Method and apparatus for gluing strips of veneer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0983829B1 (en) |
| DE (1) | DE19737593C1 (en) |
| DK (1) | DK0983829T3 (en) |
| ES (1) | ES2264807T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015208386A1 (en) | 2015-05-06 | 2016-11-10 | Heinrich Kuper Gmbh & Co Kg | Apparatus and method for assembling veneer strips |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004052871A1 (en) * | 2004-11-02 | 2006-05-04 | Heinrich Kuper Gmbh & Co Kg | Device and method for connecting thin, flat elements |
| DE102013010108B4 (en) * | 2013-06-18 | 2016-08-18 | Püschner GmbH + Co. KG | Process for producing a dimensioned material, in particular a laminated veneer lumber panel |
| FI129331B (en) * | 2017-03-07 | 2021-12-15 | Lemtapes Oy | Method and apparatus for adhesive activation |
| CN114260987B (en) * | 2021-12-28 | 2022-07-15 | 南京林业大学 | Preparation method of formaldehyde-free high-strength microwave-cured plywood |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE487545A (en) * | ||||
| US3021248A (en) * | 1955-04-04 | 1962-02-13 | Julius W Mann | Radio-frequency edge-gluing process |
| DE3304315A1 (en) * | 1983-02-09 | 1984-08-09 | Heinrich Kuper GmbH & Co KG, 4835 Rietberg | Veneer jointing machine |
| JPS59187071A (en) * | 1983-04-07 | 1984-10-24 | Nippon Kasei Kk | Adhesive for lateral bonding of raw wood veneer |
| JPS6072973A (en) * | 1983-09-30 | 1985-04-25 | Nippon Kasei Kk | Glue for jointing green veneer |
| JPH02139810A (en) * | 1988-11-21 | 1990-05-29 | Matsushita Electric Ind Co Ltd | Manufacture of superconductor |
| JPH02225001A (en) * | 1989-02-27 | 1990-09-07 | Eidai Co Ltd | Manufacture of decorative material and manufacture of decorative sheet made thereof |
| JPH04104866A (en) * | 1990-08-22 | 1992-04-07 | Toppan Printing Co Ltd | Production of decorative sheet |
| US5364333A (en) * | 1990-07-19 | 1994-11-15 | Gulf States Paper Corporation | Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the same |
| WO1996005035A1 (en) * | 1994-08-12 | 1996-02-22 | Schilcher Industrieanlagen- Und Gerätebau Gesellschaft M B H | Heating device with a microwave generator |
| WO1996027482A1 (en) * | 1995-03-06 | 1996-09-12 | Stenlund Maskiner Ab | Method and device for the heating of glued joint |
| EP0830924A2 (en) * | 1996-09-23 | 1998-03-25 | Meinan Machinery Works, Inc. | Unseasoned veneer bonding method and apparatus therefor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1041187B (en) * | 1957-02-22 | 1958-10-16 | Henkel & Cie Gmbh | Process for gluing joints in wood veneers and adhesives for carrying out this process |
| CH659617A5 (en) * | 1983-05-04 | 1987-02-13 | Fischer Ag Brugg Georg | DEVICE FOR ASSEMBLING AND CONNECTING LARGE WORKPIECES. |
| NL8901501A (en) * | 1989-06-14 | 1991-01-02 | Stephanus Petrus Van Sterkenbu | METHOD AND APPARATUS FOR WELDING PLATES EXISTING WOODY MATERIAL |
| JPH0615610A (en) * | 1992-03-31 | 1994-01-25 | Mitsui Toatsu Chem Inc | Manufacture of plywood |
-
1997
- 1997-08-28 DE DE19737593A patent/DE19737593C1/en not_active Expired - Fee Related
-
1998
- 1998-08-31 ES ES98116423T patent/ES2264807T3/en not_active Expired - Lifetime
- 1998-08-31 EP EP98116423A patent/EP0983829B1/en not_active Expired - Lifetime
- 1998-08-31 DK DK98116423T patent/DK0983829T3/en active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE487545A (en) * | ||||
| US3021248A (en) * | 1955-04-04 | 1962-02-13 | Julius W Mann | Radio-frequency edge-gluing process |
| DE3304315A1 (en) * | 1983-02-09 | 1984-08-09 | Heinrich Kuper GmbH & Co KG, 4835 Rietberg | Veneer jointing machine |
| JPS59187071A (en) * | 1983-04-07 | 1984-10-24 | Nippon Kasei Kk | Adhesive for lateral bonding of raw wood veneer |
| JPS6072973A (en) * | 1983-09-30 | 1985-04-25 | Nippon Kasei Kk | Glue for jointing green veneer |
| JPH02139810A (en) * | 1988-11-21 | 1990-05-29 | Matsushita Electric Ind Co Ltd | Manufacture of superconductor |
| JPH02225001A (en) * | 1989-02-27 | 1990-09-07 | Eidai Co Ltd | Manufacture of decorative material and manufacture of decorative sheet made thereof |
| US5364333A (en) * | 1990-07-19 | 1994-11-15 | Gulf States Paper Corporation | Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the same |
| JPH04104866A (en) * | 1990-08-22 | 1992-04-07 | Toppan Printing Co Ltd | Production of decorative sheet |
| WO1996005035A1 (en) * | 1994-08-12 | 1996-02-22 | Schilcher Industrieanlagen- Und Gerätebau Gesellschaft M B H | Heating device with a microwave generator |
| WO1996027482A1 (en) * | 1995-03-06 | 1996-09-12 | Stenlund Maskiner Ab | Method and device for the heating of glued joint |
| EP0830924A2 (en) * | 1996-09-23 | 1998-03-25 | Meinan Machinery Works, Inc. | Unseasoned veneer bonding method and apparatus therefor |
Non-Patent Citations (5)
| Title |
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| PATENT ABSTRACTS OF JAPAN vol. 009, no. 045 (C - 268) 26 February 1985 (1985-02-26) * |
| PATENT ABSTRACTS OF JAPAN vol. 009, no. 205 (C - 299) 22 August 1985 (1985-08-22) * |
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 380 (E - 0965) 16 August 1990 (1990-08-16) * |
| PATENT ABSTRACTS OF JAPAN vol. 014, no. 532 (M - 1051) 22 November 1990 (1990-11-22) * |
| PATENT ABSTRACTS OF JAPAN vol. 016, no. 349 (C - 0967) 28 July 1992 (1992-07-28) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015208386A1 (en) | 2015-05-06 | 2016-11-10 | Heinrich Kuper Gmbh & Co Kg | Apparatus and method for assembling veneer strips |
| DE102015208386B4 (en) | 2015-05-06 | 2022-06-15 | Heinrich Kuper Gmbh | Device for assembling veneer strips |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19737593C1 (en) | 1999-03-04 |
| DK0983829T3 (en) | 2006-10-09 |
| ES2264807T3 (en) | 2007-01-16 |
| EP0983829B1 (en) | 2006-06-07 |
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