EP0393384A1 - Apparatus for jointing veneer - Google Patents
Apparatus for jointing veneer Download PDFInfo
- Publication number
- EP0393384A1 EP0393384A1 EP90105646A EP90105646A EP0393384A1 EP 0393384 A1 EP0393384 A1 EP 0393384A1 EP 90105646 A EP90105646 A EP 90105646A EP 90105646 A EP90105646 A EP 90105646A EP 0393384 A1 EP0393384 A1 EP 0393384A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- transport
- drive shaft
- pressure roller
- veneer
- 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.)
- Granted
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Classifications
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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
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- 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
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1712—Indefinite or running length work
- Y10T156/1715—Means joining indefinite length work edge to edge
Definitions
- the invention relates to a device for assembling veneers with a plurality of transport rollers arranged on an axis and at least one counter-pressure roller arranged parallel to this, a heating device and a pressing device.
- a device of the type mentioned is known for example from DE-OS 34 09 178.
- Devices of this type are used to glue individual veneers or strips of veneer to one another on the long side in order to produce a large-area veneer. Since the veneer workpieces to be processed later have large, but very thin sheets, it is necessary to position the individual veneers exactly against each other before gluing takes place. It is necessary to position the edges to be glued exactly relative to each other over their entire length. It is known from the prior art to use a stop for this purpose, against which the individual veneer strips are conveyed. It is particularly useful when the veneer strips are wavy or at an angle to the gluing direction considerable difficulties connected or in many cases completely impossible to position the veneers in the known machines.
- the invention has for its object to provide a device of the type mentioned which, with a simple structure and reliable operability, ensures transport and alignment of even the thinnest veneers with uneven longitudinal edges so that the longitudinal edges are aligned transversely to the direction of flow in a desired gluing direction can.
- this object is achieved in a device of the aforementioned type in that the casing of the transport and pressure roller is non-positively connected to an inner and / or outer drive shaft by means of a slip clutch.
- the device according to the invention is distinguished by a number of considerable advantages. Due to the possibility of changing the diameter of an internal drive device, it is possible on the one hand to vary the contact pressure in the glue joint against the previous veneer sheets according to the respective requirements, and on the other hand to vary this contact pressure if veneers of varying thicknesses or different coefficients of friction are to be processed. According to the invention, the possibility of changing the diameter and allowing slippage, for example by means of a slip clutch, also leads to different conveying speeds or paths of the individual areas of the veneer or of the veneer sheet, so that obliquely or obliquely inserted veneers are aligned in a particularly simple manner can.
- this transport and pressure roller is surrounded by an outer jacket made of an elastic material, which is held by means of a cylindrical carrier body inserted into the transport and pressure roller.
- the transport and pressure roller can be constructed such that it preferably receives a support cylinder with a central recess for carrying out a shaft and that in at least one area of the support cylinder there is a recess for transmitting the pressure of the pressure fluid to the jacket internally acting preferably curved pressure plate is formed.
- the invention provides in a further, particularly advantageous embodiment that the support cylinder has an inner elastic hose in the region of the recess takes up, the inner wall of which can be acted upon by the pressure fluid.
- the hose thus serves on the one hand to seal and on the other hand to evenly transmit the pressure applied by the pressure fluid.
- the hose extends only over part of the length of the support cylinder. This opens up the possibility of arranging a plurality of such hose sections on a transport and pressure roller and pressurizing them individually separately, so that different contact pressures and different peripheral speeds can be achieved even when using only a single, continuous or sectioned transport and pressure roller .
- the invention can also be applied to individual transport and pressure rollers which can be of any length. According to the invention, it is thus possible to align veneers with relatively short adhesive areas and to position them precisely.
- the pressure fluid is preferably fed through the shaft, it being possible for the shaft to have at least one central recess for the passage of the pressure fluid, which is connected to at least one radial recess of the shaft, which is in the space between the respective hose section and the shaft opens.
- the device according to the invention thus allows the longitudinal edges of the individual veneers or veneer sheets to be glued to be aligned exactly with one another, in particular in a line transverse to the direction of transport, this being possible both in the case of straight-line as well as in corrugated or serrated connecting areas of veneers. So you can According to the invention, veneer sheets with uniform or beveled cut edges can also be positioned precisely and securely and connected to one another.
- a device according to the invention has a stationary table (23) and an upper pressure stamp (24).
- a counter-pressure roller (12) is mounted in / on the upper pressure stamp (24) and a transport and pressure roller (11) in the lower table (23).
- the pressure stamp (24) can be moved in the vertical direction in order to convey or clamp a veneer introduced in the transport direction A.
- the table (23) and the pressure ram (24) each have a heating device (25, 26), each of which, alone or together, can also be moved relatively vertically, so that in the seam area of the veneers they rest against a veneer sheet (not shown) can be moved to carry out the gluing by means of pressure and heat.
- an inlet conveyor belt (29) on which the veneer strips to be glued are fed.
- an outlet conveyor belt (30) adjoins the outlet side of the table (23) in order to remove the veneer sheets glued together.
- the counter-pressure roller (12) is mounted on a shaft (31) and connected to it via a toothing or the like.
- the shaft (31) is connected (in a manner not shown) to a drive, so that, as shown, the drive can be rotated clockwise.
- the transport and pressure roller (11) is mounted on the table (23) and is also driven by a drive, not shown.
- the device for assembling veneers according to the invention works in the usual way.
- a wide glued veneer sheet is held by means of the brake stamp (27), whereby additional stop pins (32), which are mounted on the table (23), can be moved upwards in order to remove the veneer sheet or to position its rear edge exactly.
- additional stop pins (32) which are mounted on the table (23)
- a veneer is fed via the infeed conveyor belt (29) and the transport and pressure roller (11), which, after the stop elements (32) have been removed from the transport path, is brought into contact with the existing veneer sheet.
- the upper pressure stamp (24) is moved downwards in order to press the incoming veneer and the previous veneer sheets, the previous veneer being firmly clamped in by the brake stamp (27) and the heating devices (25, 26) being pressed lightly on the veneers or the following veneer sheet form a shaft.
- the following veneer is pressed firmly against the previous veneer sheet by transport and pressure roller (11) and counter-pressure rollers (12).
- the upper and lower heating devices (25, 26) are activated with pressure and heat in order to adhere the adhesive applied to the adhesive edge of the new veneer to the other veneer sheet when the new veneer is transported to it.
- the necessary contact pressure between the veneers is generated and maintained by the transport and pressure roller (11) and the associated counter-pressure roller (12). After a predetermined exposure time, the interconnected veneer is released and transported onward leaves.
- Fig. 2 a side view of the transport and pressure roller (11) according to the invention and the associated driven counter-pressure roller (12) is shown.
- the counter-pressure roller (12) is constructed in the usual way, so that a further description is unnecessary.
- the transport and pressure roller (11) is formed from individual roller sections, each of which has an outer jacket (13) which is designed in the form of a cylinder jacket and consists of a rough material such as hard rubber.
- This jacket (13) is carried by an inner carrier body (14) made of metal, which is also designed in the form of a cylinder jacket and has a central bore through which a support cylinder (17) with an inner shaft (16) is passed.
- This shaft (16) is connected in a manner not shown to a lateral drive and has an inner bore (15) through which a pressure medium such as compressed air can be supplied.
- the outer circumference of the jacket (13) shows a high coefficient of friction to ensure the transport and pressing of a veneer in a safe manner.
- each carrier body (14) which forms only a short roller (50 - 100 mm) with the jacket (13), a support cylinder (17) is mounted, which has several parallel elongated recesses (18 ), the end areas of which are rounded and have smooth wall surfaces sloping inwards from the outside.
- each of these recesses (18) there is a curved, removable pressure plate (19), which has an outer covering (20). made of a material such as hard rubber with a high coefficient of friction.
- This outer coating (20) of the pressure plate (19) rests against the smooth support body (14) of the casing (13) and, with its friction surface, has the task, on the one hand, of taking the casing (13) with the same rotational speed or one under slip and contact pressure Allow relative movement, provided that the jacket (13) receives a lower rotational speed due to the fact that a veneer entrained by the jacket (13) encounters resistance (like the edge of a previous veneer sheet).
- the frictional force occurring between the outer friction surface of the lining (20) of the pressure plate (19) and the surrounding smooth inner wall of the cylindrical support body (14) is controlled by the elastic wall of a hose (21) which is in sections within all the support cylinders (17) lying next to one another has moved in and is preferably under the pressure of a pressure medium compressed air.
- This elastic hose (21) which extends in individual sections over the entire length of the shaft (16) or preferably almost only over the length of a support cylinder (17), consists for example of a plastic and is fully acted upon by a pressure medium on the inside which is guided through a central longitudinal bore (15) in the shaft (16) via the radial transverse channels (22) (cf. FIG. 5) to the hose (21) and acts statically.
- the pressure medium presses the flexible hose (21) into this recess (18) in such a way that the narrow, exposed pressure plate (19) moves outwards and with its coating (20) presses against the inner wall of the cylindrical support body (14) and thereby - depending on the Pressure of the pressure medium (e.g. 3 - 6 bar) - there builds up a more or less large friction force.
- Radial grub screws (33) are used for the positive connection between the shaft (16) and the respective support cylinder (17).
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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)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Zusammensetzen von Furnieren mit mehreren auf einer Achse angeordneten Transportrollen und zumindest einer parallel zu dieser angeordneten Gegendruckwalze, einer Heizeinrichtung und einer Preßeinrichtung.The invention relates to a device for assembling veneers with a plurality of transport rollers arranged on an axis and at least one counter-pressure roller arranged parallel to this, a heating device and a pressing device.
Eine Vorrichtung der eingangs genannten Art ist beispielsweise aus der DE-OS 34 09 178 bekannt. Vorrichtungen dieser Art dienen dazu, einzelne Furniere oder Furnierblattstreifen längsseitig miteinander zu verleimen, um ein großflächiges Furnierblatt zu erzeugen. Da es sich bei den später zu verarbeitenden Furnierwerkstücken um großflächige, jedoch sehr dünne Blätter handelt, ist es erforderlich, die einzelnen Furniere jeweils exakt gegeneinander anzulegen, bevor die Verleimung erfolgt. Dabei ist es erforderlich, die zu verleimenden Kanten auf ihrer gesamten Länge exakt relativ zueinander zu positionieren. Aus dem Stand der Technik ist es bekannt, hierfür einen Anschlag zu verwenden, gegen welchen jeweils die einzelnen Furnierstreifen gefördert werden. Insbesondere bei welligen oder in einem Winkel zur Verleimungsrichtung zugeförderten Furnierstreifen ist es mit erheblichen Schwierigkeiten verbunden oder bei den bekannten Maschinen vielfach gänzlich unmöglich, eine Positionierung der Furniere vorzunehmen.A device of the type mentioned is known for example from DE-OS 34 09 178. Devices of this type are used to glue individual veneers or strips of veneer to one another on the long side in order to produce a large-area veneer. Since the veneer workpieces to be processed later have large, but very thin sheets, it is necessary to position the individual veneers exactly against each other before gluing takes place. It is necessary to position the edges to be glued exactly relative to each other over their entire length. It is known from the prior art to use a stop for this purpose, against which the individual veneer strips are conveyed. It is particularly useful when the veneer strips are wavy or at an angle to the gluing direction considerable difficulties connected or in many cases completely impossible to position the veneers in the known machines.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, welche bei einfachem Aufbau und betriebssicherer Betätigbarkeit ein Transport und eine Ausrichtung auch dünnster Furniere mit ungleichmäßigen Längskanten so gewährleistet ist, daß die Längskanten in einer gewünschten Verleimungsrichtung quer zur Durchlaufrichtung ausgerichtet werden können.The invention has for its object to provide a device of the type mentioned which, with a simple structure and reliable operability, ensures transport and alignment of even the thinnest veneers with uneven longitudinal edges so that the longitudinal edges are aligned transversely to the direction of flow in a desired gluing direction can.
Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung der vorgenannten Gattung dadurch gelöst, daß der Mantel der Transport- und Anpreßrolle mit einer inneren und/oder äußeren Antriebswelle mittels einer Rutschkupplung kraftschlüssig verbunden sind.According to the invention, this object is achieved in a device of the aforementioned type in that the casing of the transport and pressure roller is non-positively connected to an inner and / or outer drive shaft by means of a slip clutch.
Die erfindungsgemäße Vorrichtung zeichnet sich durch eine Reihe erheblicher Vorteile aus. Durch die Möglichkeit, eine innere Antriebseinrichtung im Durchmesser zu verändern, ist es einerseits möglich, in der Leimfuge den Anpreßdruck gegen die vorhergehenden Furnierblätter den jeweiligen Anforderungen gemäß zu variieren, andererseits diesen Anpreßdruck zu variieren, wenn Furniere wechselnder Dicke oder unterschiedlichen Reibwerts verarbeitet werden sollen. Die Möglichkeit, den Durchmesser zu verändern und einen Schlupf zu ermöglichen, beispielsweise mittels einer Rutschkupplung, führt erfindungsgemäß auch zu unterschiedlichen Fördergeschwindigkeiten bzw. -Wegen der einzelnen Bereiche des Furniers oder des Furnierblatts, so daß schräg oder schief eingeschobene Furniere auf besonders einfache Weise ausgerichtet werden können. Dabei besteht nicht, wie beim Stand der Technik, die Gefahr, daß voreilende Bereiche des Furniers gegen einen Anschlag oder gegen die Hinterkante des vorhergehenden Furniers gedrückt und dabei beschädigt werden, da die Ausrichtung der Klebekante des Furniers durch die Transport- und Anpreßrollen erfolgen kann. Dabei ist es erfindungsgemäß besonders günstig, daß die Drehgeschwindigkeit der diese Transportrollen tragenden Welle nicht verändert werden muß, so daß komplizierte Steuerungen entfallen können. Durch einfaches Verändern des Druckmitteldruckes können die inneren Einrichtungen unterschiedlich in ihrer Reibkraft verändert werden, so daß mittels eines einzigen Antriebes unterschiedliche Fördergeschwindigkeiten an den einzelnen Bereichen der Vorrichtung erzielbar sind.The device according to the invention is distinguished by a number of considerable advantages. Due to the possibility of changing the diameter of an internal drive device, it is possible on the one hand to vary the contact pressure in the glue joint against the previous veneer sheets according to the respective requirements, and on the other hand to vary this contact pressure if veneers of varying thicknesses or different coefficients of friction are to be processed. According to the invention, the possibility of changing the diameter and allowing slippage, for example by means of a slip clutch, also leads to different conveying speeds or paths of the individual areas of the veneer or of the veneer sheet, so that obliquely or obliquely inserted veneers are aligned in a particularly simple manner can. There is no danger, as in the prior art, that leading areas of the veneer are pressed against a stop or against the rear edge of the previous veneer and be damaged, since the alignment of the adhesive edge of the veneer can be done by the transport and pressure rollers. It is particularly advantageous according to the invention that the rotational speed of the shaft carrying these transport rollers does not have to be changed, so that complicated controls can be dispensed with. By simply changing the pressure medium pressure, the internal forces of the internal devices can be changed differently, so that different conveying speeds can be achieved in the individual areas of the device by means of a single drive.
In einer besonders günstigen Weiterentwicklung der Erfindung ist vorgesehen, daß diese Transport- und Anpreßrolle von einem äußeren Mantel aus einem elastischen Material umfaßt ist, der mittels eines in die Transport- und Anpreßrolle eingesetzten zylindrischen Trägerkörper gehalten ist.In a particularly favorable further development of the invention it is provided that this transport and pressure roller is surrounded by an outer jacket made of an elastic material, which is held by means of a cylindrical carrier body inserted into the transport and pressure roller.
Gemäß einem Ausführungsbeispiel der Erfindung kann die Transport- und Anpreßrolle so aufgebaut sein, daß diese bevorzugterweise einen Stützzylinder mit einer zentrischen Ausnehmung zur Durchführung einer Welle aufnimmt und daß in zumindest einem Bereich des Stützzylinders eine Ausnehmung zur Übertragung des Drucks des Druckfluids zu einer auf den Mantel von innen einwirkende vorzugsweise gewölbten Druckplatte ausgebildet ist.According to one embodiment of the invention, the transport and pressure roller can be constructed such that it preferably receives a support cylinder with a central recess for carrying out a shaft and that in at least one area of the support cylinder there is a recess for transmitting the pressure of the pressure fluid to the jacket internally acting preferably curved pressure plate is formed.
Um das zugeleitete Druckfluid gleichmäßig über die jeweilige Länge der Transport- und Anpreßrolle zu verteilen und um den Mantel in gleichmäßiger Weise einer Reibkraft auszusetzen, ist erfindungsgemäß in einer weiteren, besonders günstigen Ausgestaltungsform vorgesehen, daß der Stützzylinder im Bereich der Ausnehmung einen inneren elastischen Schlauch aufnimmt, dessen Innenwandung mit dem Druckfluid beaufschlagbar ist. Der Schlauch dient somit zum einen der Abdichtung und zum anderen der gleichmäßigen Übertragung des durch das Druckfluid aufgewendeten Drucks.In order to distribute the supplied pressure fluid evenly over the respective length of the transport and pressure roller and to expose the jacket to a frictional force in a uniform manner, the invention provides in a further, particularly advantageous embodiment that the support cylinder has an inner elastic hose in the region of the recess takes up, the inner wall of which can be acted upon by the pressure fluid. The hose thus serves on the one hand to seal and on the other hand to evenly transmit the pressure applied by the pressure fluid.
In einer besonders bevorzugten Ausgestaltung der Erfindung ist weiterhin vorgesehen, daß sich der Schlauch nur über einen Teil der Länge des Stützzylinders erstreckt. Dieses eröffnet die Möglichkeit, an einer Transport- und Anpreßrolle mehrere derartige Schlauchabschnitte anzuordnen und diese einzeln gesondert mit Druck zu beaufschlagen, so daß auch bei Verwendung nur einer einzigen, durchgehenden oder in Abschnitten unterteilten Transport- und Anpreßrolle unterschiedliche Anpreßdrücke und unterschiedliche Umfangsgeschwindigkeiten realisiert werden können. Somit ist die Erfindung auch auf einzelne, in ihrer Länge beliebig lang ausgestaltbare Transport- und Anpreßrollen anwendbar. Erfindungsgemäß ist es somit möglich, auch Furniere mit relativ kurzen Klebebereichen auszurichten und exakt zu positionieren.In a particularly preferred embodiment of the invention it is further provided that the hose extends only over part of the length of the support cylinder. This opens up the possibility of arranging a plurality of such hose sections on a transport and pressure roller and pressurizing them individually separately, so that different contact pressures and different peripheral speeds can be achieved even when using only a single, continuous or sectioned transport and pressure roller . Thus, the invention can also be applied to individual transport and pressure rollers which can be of any length. According to the invention, it is thus possible to align veneers with relatively short adhesive areas and to position them precisely.
Die Zuführung des Druckfluids erfolgt erfindungsgemäß bevorzugterweise durch die Welle, wobei es sich als bevorzugt erweisen kann, wenn die Welle zumindest eine zentrische Ausnehmung zur Durchleitung des Druckfluids aufweist, die mit zumindest einer radialen Ausnehmung der Welle in Verbindung steht, die in den Zwischenraum zwischen dem jeweiligen Schlauchabschnitt und der Welle mündet.According to the invention, the pressure fluid is preferably fed through the shaft, it being possible for the shaft to have at least one central recess for the passage of the pressure fluid, which is connected to at least one radial recess of the shaft, which is in the space between the respective hose section and the shaft opens.
Die erfindungsgemäße Vorrichtung gestattet es somit, die zu verleimenden Längskanten der einzelnen Furniere oder Furnierblätter exakt gegeneinander auszurichten, insbesondere in einer Linie quer zur Transportrichtung, wobei dies sowohl bei geradlinigen als auch bei gewellten oder gezackten Verbindungsbereichen von Furnieren möglich ist. Somit können erfindungsgemäß auch Furnierblätter mit gleichmäßigen oder geschrägten Schnittkanten exakt und sicher positioniert und miteinander verbunden werden.The device according to the invention thus allows the longitudinal edges of the individual veneers or veneer sheets to be glued to be aligned exactly with one another, in particular in a line transverse to the direction of transport, this being possible both in the case of straight-line as well as in corrugated or serrated connecting areas of veneers. So you can According to the invention, veneer sheets with uniform or beveled cut edges can also be positioned precisely and securely and connected to one another.
Nachfolgend wird die Erfindung anhand eines Ausführungsbeispieles in Verbindung mit der Zeichnung beschrieben. Es zeigt:
- Fig. 1 eine Teil-Seitenschnittansicht des Arbeitsbereichs einer erfindungsgemäßen Vorrichtung zum Zusammensetzen von Furnieren,
- Fig. 2 einen Längsschnitt durch eine erfindungsgemäße Transport- und Anpreßrolle und eine Seitenansicht einer Gegendruckrolle,
- Fig. 3 eine perspektivische Ansicht (Explosionsdarstellung) eines Stützzylinders mit Druckplatten,
- Fig. 4 einen Teil-Längsschnitt durch eine erfindungsgemäße Transport- und Anpreßrolle gem. Fig. 2 in vergrößerter Darstellung,
- Fig. 5 einen Querschnitt durch dieselbe Transport- und Anpreßrolle gem. Fig. 4 entsprechend Schnittlinie III-III,
- Fig. 6 eine perspektivische Ansicht eines Teiles der Transport- und Anpreßrolle mit Teilschnitt durch die innere Antriebseinrichtung mit Stützzylinder, Schlauch und Druckplatte gemäß Fig. 3 und Welle.
- 1 is a partial side sectional view of the working area of a device for assembling veneers,
- 2 shows a longitudinal section through a transport and pressure roller according to the invention and a side view of a counter pressure roller,
- 3 is a perspective view (exploded view) of a support cylinder with pressure plates,
- Fig. 4 is a partial longitudinal section through a transport and pressure roller according to the invention. 2 in an enlarged view,
- Fig. 5 shows a cross section through the same transport and pressure roller acc. 4 according to section line III-III,
- Fig. 6 is a perspective view of part of the transport and pressure roller with partial section through the inner drive device with support cylinder, hose and pressure plate according to FIG. 3 and shaft.
Eine erfindungsgemäße Vorrichtung weist neben den üblichen Einrichtungen, welche beispielsweise aus einer Vorrichtung gemäß der DE-OS 26 14 216, auf die hiermit Bezug genommen wird, bekannt sind, einen stationären Tisch (23) und einen oberen Andruckstempel (24) auf. An der Einlaufseite A ist eine Gegendruckwalze (12) im/am oberen Andruckstempel (24) und eine Transport- und Anpreßrolle (11) im unteren Tisch (23) gelagert. Der Andruckstempel (24) ist in vertikaler Richtung bewegbar, um ein in Transportrichtung A eingeführtes Furnier zu fördern bzw. zu klemmen.In addition to the usual devices, which are known, for example, from a device according to DE-OS 26 14 216, to which reference is hereby made, a device according to the invention has a stationary table (23) and an upper pressure stamp (24). On the inlet side A, a counter-pressure roller (12) is mounted in / on the upper pressure stamp (24) and a transport and pressure roller (11) in the lower table (23). The pressure stamp (24) can be moved in the vertical direction in order to convey or clamp a veneer introduced in the transport direction A.
Im mittleren Bereich weisen der Tisch (23) und der Andruckstempel (24) jeweils eine Heizeinrichtung (25, 26) auf, die jeweils allein oder zusammen ebenfalls vertikal relativ verfahrbar sind, so daß diese im Nahtbereich der Furniere in Anlage an ein nicht dargestelltes Furnierblatt bewegt werden kann, um das Verleimen mittels Druck und Wärme durchzuführen.In the central area, the table (23) and the pressure ram (24) each have a heating device (25, 26), each of which, alone or together, can also be moved relatively vertically, so that in the seam area of the veneers they rest against a veneer sheet (not shown) can be moved to carry out the gluing by means of pressure and heat.
Im Auslaufbereich des Tisches (23) sind weiterhin Bremsstempel (27) gelagert, die über eine Druckeinrichtung (28) betätigbar sind, um das ankommende Furnier zu halten bzw. abzubremsen.In the outlet area of the table (23) there are furthermore brake stamps (27) which can be actuated by a pressure device (28) in order to hold or brake the incoming veneer.
An der Einlaufseite A des Tisches (23) endet ein Einlaufförderband (29), auf welchem die zu verleimenden Furnierstreifen zugeführt werden. In analoger Weise schließt sich an die Auslaufseite des Tisches (23) ein Auslaufförderband (30) an, um die miteinander verleimten Furnierblätter abzutransportieren.At the inlet side A of the table (23) ends an inlet conveyor belt (29) on which the veneer strips to be glued are fed. In an analogous manner, an outlet conveyor belt (30) adjoins the outlet side of the table (23) in order to remove the veneer sheets glued together.
Die Gegendruckwalze (12) ist auf einer Welle (31) gelagert und mit dieser über eine Verzahnung o. dgl. verbunden. Die Welle (31) ist dabei (in nicht dargestellter Weise) mit einem Antrieb verbunden, so daß diese, wie dargestellt, im Uhrzeigersinn zwangsdrehbar ist.The counter-pressure roller (12) is mounted on a shaft (31) and connected to it via a toothing or the like. The shaft (31) is connected (in a manner not shown) to a drive, so that, as shown, the drive can be rotated clockwise.
Die Transport- und Anpreßrolle (11) ist an dem Tisch (23) gelagert und wird ebenfalls mittels eines nicht dargestellten Antriebs angetrieben.The transport and pressure roller (11) is mounted on the table (23) and is also driven by a drive, not shown.
Die erfindungsgemäße Vorrichtung zum Zusammensetzen von Furnieren arbeitet in üblicher Weise.The device for assembling veneers according to the invention works in the usual way.
In dem in Fig. 1 dargestellten linken Bereich der Vorrichtung wird ein breites verleimtes Furnierblatt mittels der Bremsstempel (27) gehalten, wobei zusätzlich Anschlagstifte (32), die am Tisch (23) gelagert sind, nach oben gefahren werden können, um das Furnierblatt bzw. dessen hintere Kante exakt zu positionieren. Nachfolgend wird über das Einlauf -Förderband (29) und die Transport- und Anpreßrolle (11) ein Furnier zugeführt, das, nachdem die Anschlagelemente (32) aus der Transportbahn entfernt wurden, gegen das bereits vorhandene Furnierblatt zur Anlage gebracht wird. Gleichzeitig wird der obere Druckstempel (24) nach unten verfahren, um das ankommende Furnier und die vorhergehenden Furnierblätter zu pressen, wobei das vorhergehende Furnier von dem Bremsstempel (27) fest eingespannt wird und die Heizeinrichtungen (25, 26) bei leichtem Federdruck auf die Furniere bzw. das nachfolgende Furnierblatt einen Schacht bilden. In diesem Schacht wird das nachfolgende Furnier durch Transport- und Anpreßrolle (11) und Gegendruckwalzen (12) an das vorhergehende Furnierblatt fest angedrückt. Zusätzlich werden die obere und die untere Heizeinrichtung (25, 26) mit Druck und Wärme aktiviert, um den beim Zutransport des neuen Furnieres auf dessen Klebekante aufgebrachten Klebstoff mit dem anderen Furnierblatt zu verkleben. Dabei wird der notwendige Anpreßdruck zwischen den Furnieren durch die Transport- und Anpreßrolle (11) sowie die zugehörige Gegendruckwalze (12) erzeugt und aufrechterhalten. Nach einer vorbestimmten Einwirkzeit erfolgt eine Freigabe und ein Weitertransport der miteinander verbundenen Furnier blätter.In the left area of the device shown in Fig. 1, a wide glued veneer sheet is held by means of the brake stamp (27), whereby additional stop pins (32), which are mounted on the table (23), can be moved upwards in order to remove the veneer sheet or to position its rear edge exactly. Subsequently, a veneer is fed via the infeed conveyor belt (29) and the transport and pressure roller (11), which, after the stop elements (32) have been removed from the transport path, is brought into contact with the existing veneer sheet. At the same time, the upper pressure stamp (24) is moved downwards in order to press the incoming veneer and the previous veneer sheets, the previous veneer being firmly clamped in by the brake stamp (27) and the heating devices (25, 26) being pressed lightly on the veneers or the following veneer sheet form a shaft. In this shaft, the following veneer is pressed firmly against the previous veneer sheet by transport and pressure roller (11) and counter-pressure rollers (12). In addition, the upper and lower heating devices (25, 26) are activated with pressure and heat in order to adhere the adhesive applied to the adhesive edge of the new veneer to the other veneer sheet when the new veneer is transported to it. The necessary contact pressure between the veneers is generated and maintained by the transport and pressure roller (11) and the associated counter-pressure roller (12). After a predetermined exposure time, the interconnected veneer is released and transported onward leaves.
In Fig. 2 ist eine Seitenansicht der erfindungsgemäßen Transport- und Anpreßrolle (11) sowie der dazugehörigen angetriebenen Gegendruckwalze (12) dargestellt. Die Gegendruckwalze (12) ist in üblicher Weise aufgebaut, so daß sich eine weitere Beschreibung erübrigt.In Fig. 2 a side view of the transport and pressure roller (11) according to the invention and the associated driven counter-pressure roller (12) is shown. The counter-pressure roller (12) is constructed in the usual way, so that a further description is unnecessary.
Die erfindungsgemäße Transport- und Anpreßrolle (11) ist aus einzelnen Rollenabschnitten gebildet, die jeweils einen äußeren Mantel (13) aufweisen, der in Form eines Zylindermantels ausgebildet ist und aus einem rauhen Werkstoff wie Hartgummi besteht. Dieser Mantel (13) ist von einem inneren Trägerkörper (14) aus Metall getragen, der ebenfalls in Form eines Zylindermantels ausgebildet ist und eine zentrische Bohrung aufweist, durch die ein Stützzylinder (17) mit einer inneren Welle (16) hindurchgeführt ist. Diese Welle (16) ist in nicht dargezeigter Weise mit einem seitlichen Antrieb verbunden und weist eine innere Bohrung ( 15 ) auf, durch die ein Druckmittel wie Druckluft zugeführt werden kann.The transport and pressure roller (11) according to the invention is formed from individual roller sections, each of which has an outer jacket (13) which is designed in the form of a cylinder jacket and consists of a rough material such as hard rubber. This jacket (13) is carried by an inner carrier body (14) made of metal, which is also designed in the form of a cylinder jacket and has a central bore through which a support cylinder (17) with an inner shaft (16) is passed. This shaft (16) is connected in a manner not shown to a lateral drive and has an inner bore (15) through which a pressure medium such as compressed air can be supplied.
Der Außenumfang des Mantels (13) zeigt einen hohen Reibwert, um in sicherer Weise den Transport und das Anpressen eines Furnieres zu gewährleisten.The outer circumference of the jacket (13) shows a high coefficient of friction to ensure the transport and pressing of a veneer in a safe manner.
Innerhalb jedes Trägerkörpers (14), der mit dem Mantel (13) nur jeweils eine kurze Walze (50 - 100 mm) bildet, lagert ein Stützzylinder (17), der in seinem mittleren Längsbereich auf seinem Umfang verteilt mehrere parallel verlaufende längliche Ausnehmungen (18) hat, deren Endbereiche abgerundet sind und von außen nach innen geneigte glatte Wandflächen aufweisen.Within each carrier body (14), which forms only a short roller (50 - 100 mm) with the jacket (13), a support cylinder (17) is mounted, which has several parallel elongated recesses (18 ), the end areas of which are rounded and have smooth wall surfaces sloping inwards from the outside.
In diesen Ausnehmungen (18) lagert jeweils eine gewölbte herausnehmbare Druckplatte (19), die einen äußeren Belag (20 ) aus einem Material wie Hartgummi mit einem hohen Reibwert aufweist. Dieser äußere Belag (20 ) der Druckplatte (19) legt sich gegen den glatten Trägerkörper (14) des Mantels (13) an und hat mit seiner Reibfläche die Aufgabe, einerseits den Mantel (13) mit gleicher Drehgeschwindigkeit mitzunehmen oder unter Schlupf und Anpreßdruck eine Relativbewegung zuzulassen, sofern der Mantel (13) eine geringere Drehgeschwindigkeit dadurch erhält, daß ein von dem Mantel (13) mitgenommenes Furnier an einen Widerstand stößt (wie die Kante eines vorhergehenden Furnierblattes).In each of these recesses (18) there is a curved, removable pressure plate (19), which has an outer covering (20). made of a material such as hard rubber with a high coefficient of friction. This outer coating (20) of the pressure plate (19) rests against the smooth support body (14) of the casing (13) and, with its friction surface, has the task, on the one hand, of taking the casing (13) with the same rotational speed or one under slip and contact pressure Allow relative movement, provided that the jacket (13) receives a lower rotational speed due to the fact that a veneer entrained by the jacket (13) encounters resistance (like the edge of a previous veneer sheet).
Die zwischen der äußeren Reibfläche des Belages (20 ) der Druckplatte ( 19) und der umgebenden glatten Innenwand des zylindrischen Trägerkörpers (14) auftretende Reibkraft wird durch die elastische Wandung eines Schlauches (21) gesteuert, der innerhalb aller nebeneinanderliegender Stützzylinder (17) in Abschnitten eingezogen ist und unter dem Druck eines Druckmittels vorzugsweise Druckluft steht.The frictional force occurring between the outer friction surface of the lining (20) of the pressure plate (19) and the surrounding smooth inner wall of the cylindrical support body (14) is controlled by the elastic wall of a hose (21) which is in sections within all the support cylinders (17) lying next to one another has moved in and is preferably under the pressure of a pressure medium compressed air.
Dieser elastische Schlauch (21), der sich in einzelnen Abschnitten über die ganze Länge der Welle (16) erstreckt oder vorzugsweise fast nur über die Länge eines Stützzylinders (17), besteht beispielsweise aus einem Kunststoff und wird auf seiner Innenseite von einem Druckmittel voll beaufschlagt, das durch eine zentrische Längsbohrung ( 15 ) in der Welle (16) über die radialen Querkanäle (22 ) (vgl. Fig. 5) an den Schlauch (21) herangeführt wird und statisch wirkt.This elastic hose (21), which extends in individual sections over the entire length of the shaft (16) or preferably almost only over the length of a support cylinder (17), consists for example of a plastic and is fully acted upon by a pressure medium on the inside which is guided through a central longitudinal bore (15) in the shaft (16) via the radial transverse channels (22) (cf. FIG. 5) to the hose (21) and acts statically.
Im Bereich jeder Ausnehmung (18) des Stützzylinders (17) drückt das Druckmittel den nachgiebigen Schlauch (21) in diese Ausnehmung (18) derart hinein, daß die schmale freiliegende Druckplatte (19) nach außen sich bewegt und mit ihrem Belag (20 ) sich gegen die Innenwandung des zylinderförmigen Trägerkörpers (14) preßt und dadurch - je nach dem Druck des Druckmittels (z. B. 3 - 6 bar) - dort eine mehr oder weniger große Reibkraft aufbaut.In the area of each recess (18) of the support cylinder (17), the pressure medium presses the flexible hose (21) into this recess (18) in such a way that the narrow, exposed pressure plate (19) moves outwards and with its coating (20) presses against the inner wall of the cylindrical support body (14) and thereby - depending on the Pressure of the pressure medium (e.g. 3 - 6 bar) - there builds up a more or less large friction force.
Da mehrere Ausnehmungen (18) gleichmäßig (in gleichen Abständen) über den Umfang jedes Stützzylinders (17) verteilt sind, so wird ebenfalls an der Innenwandung des Trägerkörpers (14) an mehreren Flächen gleichen Abstandes eine gleiche Reibkraft erzeugt.Since a plurality of recesses (18) are distributed uniformly (at equal intervals) over the circumference of each support cylinder (17), the same friction force is also generated on the inner wall of the carrier body (14) on a plurality of surfaces of the same distance.
Stößt nun ein auf der oberen Scheitellinie des Mantels (13) der Transport- und Anpreßrolle (11) laufendes Furnier gegen ein vorhergehendes Furnierblatt (links in Fig. 1) und hat dabei eine gebogene vorstehende Längskante, so wird dieser vorstehende gebogene Teil der Längskante aufgrund des Gegendruckes und damit der Relativbewegung zwischen Mantel (13) und Welle (16) nicht weiter gefördert, während benachbarte Teile der zu verleimenden Längskante, die noch nicht das vorhergehende Furnierblatt berühren, weiter transportiert werden, bis die gesamte Längskante auf einer Linie (auf der Linie der Längskante des vorhergehenden Furnierblattes) liegt und exakt mit der rückseitigen Längskante des vorhergehenden Furnierblattes übereinstimmend verleimt werden kann. Dazu bewegt sich der Andruckstempel (24) nach unten und preßt die vorher richtig positionierten Längskanten unter Aufheizung des stumpfverleimenden Klebstoffes zusammen.If a veneer running on the upper apex line of the casing (13) of the transport and pressure roller (11) bumps against a previous veneer sheet (on the left in FIG. 1) and has a curved, protruding longitudinal edge, this protruding, curved part of the longitudinal edge becomes due the back pressure and thus the relative movement between the jacket (13) and the shaft (16) is not further promoted, while adjacent parts of the longitudinal edge to be glued, which do not yet touch the previous veneer sheet, are transported until the entire longitudinal edge is in line (on the Line of the longitudinal edge of the previous veneer sheet) and can be glued exactly in accordance with the rear longitudinal edge of the previous veneer sheet. For this purpose, the pressure stamp (24) moves downwards and presses the previously correctly positioned longitudinal edges together while heating up the die-gluing adhesive.
Zur formschlüssigen Verbindung zwischen der Welle (16) und dem jeweiligen Stützzylinder (17) sind radiale Madenschrauben (33) eingesetzt.Radial grub screws (33) are used for the positive connection between the shaft (16) and the respective support cylinder (17).
Zwischen zwei Transport- und Anpreßrollen (11) stehen jeweils auf der Welle (16) abgestützte Abstandsringe ( 4) vor, die verhindern, daß der Mantel (13) bzw. der Trägerkörper (14) auf den benachbarten Stützzylindern (17) hin- und herwandert, die getrennt voneinander jeweils ebenso lang sind wie der Mantel (13).Between two transport and pressure rollers (11) project on the shaft (16) supported spacer rings (4), which prevent the jacket (13) or the carrier body (14) on the adjacent support cylinders (17) back and forth hikes, which are separately as long as the jacket (13).
Wie Fig. 2 zeigt, erstrecken sich einzelne Abschnitte des Schlauches (21) fast über die Länge jedes Stützzylinders (17) und die Drucklufträume sind seitlich durch Ringdichtungen (35) abgedichtet.As shown in Fig. 2, individual sections of the hose (21) extend almost over the length of each support cylinder (17) and the compressed air spaces are sealed laterally by ring seals (35).
Claims (16)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8903793U | 1989-03-28 | ||
| DE8903793U DE8903793U1 (en) | 1989-03-28 | 1989-03-28 | Device for assembling veneers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0393384A1 true EP0393384A1 (en) | 1990-10-24 |
| EP0393384B1 EP0393384B1 (en) | 1994-08-17 |
Family
ID=6837580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90105646A Expired - Lifetime EP0393384B1 (en) | 1989-03-28 | 1990-03-24 | Apparatus for jointing veneer |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5230766A (en) |
| EP (1) | EP0393384B1 (en) |
| JP (1) | JPH0332802A (en) |
| DE (2) | DE8903793U1 (en) |
| DK (1) | DK0393384T3 (en) |
| ES (1) | ES2062144T3 (en) |
| FI (1) | FI93325C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19904438C1 (en) * | 1999-02-04 | 2000-05-25 | Holzindustrie Bruchsal Gmbh | Veneer fitting machine for furniture has work table with heating head movable vertically and press shoe for veneer |
| JP2002371494A (en) * | 2002-03-11 | 2002-12-26 | Daiki:Kk | Sanitary paper |
| US20060275241A1 (en) * | 2005-06-06 | 2006-12-07 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Cosmetic towelette product |
| DE102016210552B3 (en) * | 2016-06-14 | 2017-08-31 | Heinrich Kuper Gmbh & Co Kg | Apparatus for assembling veneer strips into a sheet |
| CN111702888B (en) * | 2020-07-01 | 2024-10-15 | 嘉兴恒通木业有限公司 | Semi-automatic wooden veneer splicing equipment |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2331743A (en) * | 1942-05-23 | 1943-10-12 | Marathon Paper Mills Co | Roll spindle |
| DE747289C (en) * | 1938-10-05 | 1944-09-18 | Alfred Pahl | Veneer joint gluing machine for thin veneers |
| FR1388085A (en) * | 1963-12-27 | 1965-02-05 | Burton Fils Ets | Crazy ordered roll |
| US3510082A (en) * | 1967-11-24 | 1970-05-05 | Arthur T Williams | Pneumatic chuck |
| US3540567A (en) * | 1968-09-25 | 1970-11-17 | Potlatch Forests Inc | Biasing and indexing apparatus for sheet conveyor assembly |
| DE2523110A1 (en) * | 1975-05-24 | 1976-12-02 | Erwin Haug | Veneer sheet production system with transport rollers - has counter pressure rollers and adhesive application systems |
| FR2537102A1 (en) * | 1982-12-01 | 1984-06-08 | Gallet Sa | Conveyor with rollers driven by a friction ring |
| US4461430A (en) * | 1983-03-01 | 1984-07-24 | Louis Lever | Differential winding air shaft |
| DE3409178A1 (en) * | 1983-05-04 | 1984-11-08 | Georg Fischer AG Brugg, Brugg | Apparatus for assembling and joining laminar workpieces |
| FR2616140A1 (en) * | 1987-06-05 | 1988-12-09 | Achard Picard Jean | Expandable and retractable shaft especially for the gripping of spindles receiving materials in the form of a web (sheet) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH265909A (en) * | 1944-06-06 | 1949-12-31 | Fischer Schmutz Adolf | Joining and gluing machine for flat material. |
| GB745453A (en) * | 1953-06-25 | 1956-02-29 | Gerardus Johannes Maria Kok | Improvements in or relating to the edgewise joining of sheets |
| DE1292958B (en) * | 1962-12-01 | 1969-04-17 | Saueressig Kg Geb | Roller, especially printing roller for textile and paper printing |
| FR1576917A (en) * | 1967-08-17 | 1969-08-01 | ||
| GB1546778A (en) * | 1975-06-10 | 1979-05-31 | Agfa Gevaert | Rotatable pressure means with adjustable pressure length |
| NL8303102A (en) * | 1983-09-07 | 1985-04-01 | Het Noorden Ingbureau | LAMINATING DEVICE. |
| FI75407C (en) * | 1986-11-21 | 1988-06-09 | Valmet Oy | Method in a bend-controlled roll and roll device for application of the method. |
| EP0384173B1 (en) * | 1986-11-29 | 1992-07-22 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Sealing member for a roll with an adjustable linear contact pressure |
| DE3723385A1 (en) * | 1987-07-15 | 1989-01-26 | Siemens Ag | SHAFT ROTATING DEVICE WITH HYDROMECHANICAL OVERHAUL |
-
1989
- 1989-03-28 DE DE8903793U patent/DE8903793U1/en not_active Expired - Lifetime
-
1990
- 1990-03-07 FI FI901152A patent/FI93325C/en active IP Right Grant
- 1990-03-24 DK DK90105646.5T patent/DK0393384T3/en active
- 1990-03-24 DE DE59006807T patent/DE59006807D1/en not_active Expired - Fee Related
- 1990-03-24 EP EP90105646A patent/EP0393384B1/en not_active Expired - Lifetime
- 1990-03-24 ES ES90105646T patent/ES2062144T3/en not_active Expired - Fee Related
- 1990-03-27 US US07/500,387 patent/US5230766A/en not_active Expired - Lifetime
- 1990-03-28 JP JP2077153A patent/JPH0332802A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747289C (en) * | 1938-10-05 | 1944-09-18 | Alfred Pahl | Veneer joint gluing machine for thin veneers |
| US2331743A (en) * | 1942-05-23 | 1943-10-12 | Marathon Paper Mills Co | Roll spindle |
| FR1388085A (en) * | 1963-12-27 | 1965-02-05 | Burton Fils Ets | Crazy ordered roll |
| US3510082A (en) * | 1967-11-24 | 1970-05-05 | Arthur T Williams | Pneumatic chuck |
| US3540567A (en) * | 1968-09-25 | 1970-11-17 | Potlatch Forests Inc | Biasing and indexing apparatus for sheet conveyor assembly |
| DE2523110A1 (en) * | 1975-05-24 | 1976-12-02 | Erwin Haug | Veneer sheet production system with transport rollers - has counter pressure rollers and adhesive application systems |
| FR2537102A1 (en) * | 1982-12-01 | 1984-06-08 | Gallet Sa | Conveyor with rollers driven by a friction ring |
| US4461430A (en) * | 1983-03-01 | 1984-07-24 | Louis Lever | Differential winding air shaft |
| DE3409178A1 (en) * | 1983-05-04 | 1984-11-08 | Georg Fischer AG Brugg, Brugg | Apparatus for assembling and joining laminar workpieces |
| FR2616140A1 (en) * | 1987-06-05 | 1988-12-09 | Achard Picard Jean | Expandable and retractable shaft especially for the gripping of spindles receiving materials in the form of a web (sheet) |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8903793U1 (en) | 1990-07-26 |
| EP0393384B1 (en) | 1994-08-17 |
| DK0393384T3 (en) | 1994-11-14 |
| FI901152A0 (en) | 1990-03-07 |
| JPH0332802A (en) | 1991-02-13 |
| FI93325C (en) | 1995-03-27 |
| ES2062144T3 (en) | 1994-12-16 |
| US5230766A (en) | 1993-07-27 |
| FI93325B (en) | 1994-12-15 |
| DE59006807D1 (en) | 1994-09-22 |
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