EP0396072B1 - Machine for assembling strips of veneer - Google Patents

Machine for assembling strips of veneer Download PDF

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Publication number
EP0396072B1
EP0396072B1 EP90108180A EP90108180A EP0396072B1 EP 0396072 B1 EP0396072 B1 EP 0396072B1 EP 90108180 A EP90108180 A EP 90108180A EP 90108180 A EP90108180 A EP 90108180A EP 0396072 B1 EP0396072 B1 EP 0396072B1
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EP
European Patent Office
Prior art keywords
machine
veneer
strips
veneer according
pressure
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
EP90108180A
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German (de)
French (fr)
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EP0396072A3 (en
EP0396072A2 (en
Inventor
Theo Grönebaum
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.)
Heinrich Kuper GmbH and Co KG
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Heinrich Kuper GmbH and Co KG
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Publication of EP0396072A2 publication Critical patent/EP0396072A2/en
Publication of EP0396072A3 publication Critical patent/EP0396072A3/en
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Classifications

    • 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
    • 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
    • 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 veneer splicing machine with transport means mounted in a machine frame and a pressure stamp with heating device, which is arranged so as to be able to butt glue end edges of adjacent veneers so as to be displaceable perpendicularly thereto.
  • the feed rollers or rollers are rotatably mounted on a lower stationary table, by means of which the incoming veneers are pressed into the machine and pressed against the rear end edge of a previous veneer sheet. It is also known to arrange a counter-pressure roller or the like in the machine upper part in order to ensure a sufficient advance of the incoming veneer.
  • the object of the invention is to provide a generic veneer splicing machine with an upper counter-pressure roller, which with its The circumference resiliently touches the surface of the incoming veneer and thus avoids the disadvantages of known machines.
  • the storage of such a counter-pressure roller within a vertically displaceable pressure stamp should be improved in such a way that it adjusts itself delicately to the surface of the adjacent veneers in order to press them and to activate their glue for glue gluing.
  • this object is achieved in a veneer assembly machine of the aforementioned type by the characterizing features of claim 1.
  • the surface (the casing) of the counterpressure roller can thus be spaced apart within certain limits with respect to the inner drive shaft, so that the surface responds sensitively to different thicknesses of incoming veneers.
  • a device for transmitting the circumferential force emanating from the drive shaft to the outer tube is provided between the inner drive shaft and the outer tube.
  • two longitudinal grooves running parallel to the longitudinal side of the tube, which are opposite each other in mirror image, are provided, and the drive shaft has through-bores through which a driving pin is inserted, the tip of which engages in at least one longitudinal groove.
  • the protection extends not only to the individual features, but also to their combination.
  • a device for assembling veneers has a lower stationary table (10) and an upper pressure stamp (11).
  • This transport roller (13) is constructed in a known and customary manner, so that a further description is unnecessary
  • the pressure stamp (11) can be moved in the vertical direction in order to convey or insert a veneer (16) introduced in the transport direction A to pinch.
  • the table (10) and the pressure plunger (11) each have a heating device (14, 15), each of which can also be moved vertically on its own or together, so that it touches the front edge area of the adjacent veneers (16) Veneer sheet (16) can be moved to glue by means of pressure and heat.
  • An outlet conveyor belt (20) connects to the outlet side of the table (10) in an analogous manner in order to remove the veneer sheets glued together.
  • the transport or pressure roller (13) is mounted on the table (10) and is driven by a drive, not shown.
  • the entire counter-pressure roller (12) is formed by a plurality of individual pressure rollers (22) mounted one behind the other at a distance from one another around a central drive shaft (21).
  • the shaft (21) is connected (in a manner not shown) to a drive, so that it can be rotated clockwise as shown.
  • Each individual pressure roller (22) is a tube with a circular cross-section, from the inner surface of which two longitudinal grooves (23), which run parallel to the longitudinal axis of the tube and are opposite each other in mirror image, point out over the entire length of the tube to the outside of the outer tube surface.
  • the shaft (21) is arranged in the tube, on the one hand mounted on the end face (not shown), on the other hand connected to a drive (also not shown) on the end face. It points to the part of its length, each of the circular tube is surrounded by two through bores (24) at a right angle to one another to the longitudinal axis of the shaft. Through these holes (24) - with play - drive pins (25) are inserted, the length of which is slightly less than the distance from the bottom of the longitudinal groove to the bottom of the longitudinal groove.
  • the width of the two opposing longitudinal grooves (23) is larger (about two to three times) than the diameter of the driving pin (25). Since the diameter of the shaft (21) is smaller than the inside diameter of the roller (22), a coaxial position of the shaft (21) and roller (22) results in a uniform free space running in a ring, axially and radially between the outer surface of the shaft and the inner roller (26).
  • the individual pressure rollers (22) of the counter-pressure roller (12) can individually adapt to the different veneer thicknesses along a veneer sheet. This ensures continuous transport and pressure of the veneer sheet against the previous one, with a larger veneer thickness overall, the counterpressure roller (12) is also arranged correspondingly higher than a smaller one.
  • the device for assembling veneers works as follows:
  • a wide pre-glued veneer sheet (16) is introduced, whereby additional stop pins (27), which are mounted on the table (10), can be moved upwards to the veneer sheet (16) or to position its rear edge exactly.
  • a veneer is then fed via the infeed conveyor belt (19) and the transport or pressing roller (13), which, after the stop pins (27) have been removed from the transport path, against the already existing veneer sheet (16) and by means of brake stamps ( 17) is brought to the plant.
  • a horizontal shaft is formed between the heating devices, in which the following veneer is pressed firmly against the previous veneer sheet by means of a transport or pressure roller (13) and counter-pressure roller (12).
  • the upper and lower heating devices (14, 15) are then activated with pressure and heat in order to bond the adhesive applied to the adhesive edge of the new veneer to the other veneer sheet (16) when the new veneer is transported to it.
  • the necessary contact pressure between the veneers is generated and maintained by the transport or contact roller (13) and the associated counter-pressure roller (12). After a predetermined exposure time, the interconnected veneer sheets (16) are released and transported onward.
  • the movability of the heating devices (14, 15) of the pressure plunger (11) and table (10) and of the profile tube (28) arranged above them, which corresponds approximately to the working width of the device, can be achieved in a known manner by drive elements such as B. pressure medium cylinder (29) and / or connecting rod (not shown) and / or rack (also not shown) o.
  • the profile tube (28), which extends in the transverse direction, is height-adjustable in larger areas by means of a lifting device, not shown.
  • These guide strips (30) hold at their lower ends the block-shaped pressure stamp (11), in which - as already described - the counter-pressure roller (12) is eccentrically mounted on the one-side.
  • This pressure stamp (11) clamps with greater force both the incoming veneer and the veneer sheet that has already passed through on the table (10), the stop pins (27) being lowered downward and the adjacent end edges of the veneer or veneer sheet approaching one another to have.
  • the brake plunger (17) has also been lowered as a result.
  • the block-shaped pressure stamp has a central and slot-like opening (34), in which a heating plate (32) is mounted separately, which can be moved vertically by means of a lifting rod (33) with a separately controlled lifting cylinder (29 b) or the like.
  • the narrow heating plate (32) presses on this end edge region, so that the gluing takes place under a certain pressure and heat.
  • the pressure stamp (11) moves upwards and releases the inlet gap.
  • the pressure stamp (11) can be firmly screwed to the two guide strips (30); these two parts can also consist of a workpiece.
  • the pressure stamp (11) can be divided in its middle in its longitudinal direction and thus be in two pieces and accommodate the heating device in the middle between them.
  • the height movement of each part of the pressure stamp (11) can be controlled differently with the respective guide bar (30).

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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)

Description

Die Erfindung bezieht sich auf eine Furnier-Zusammensetzmaschine mit in einem Maschinengestell gelagerten Transportmittel und einem zum Stumpfverleimen von Stirnkanten benachbarter Furniere senkrecht dazu verschiebbar angeordneten Andruckstempel mit Heizeinrichtung, nach dem Oberbegriff des Anspruches 1.The invention relates to a veneer splicing machine with transport means mounted in a machine frame and a pressure stamp with heating device, which is arranged so as to be able to butt glue end edges of adjacent veneers so as to be displaceable perpendicularly thereto.

Bei einer derartigen aus der DE-A-949 433 bekannten Zusammensetzmaschine sind auf einem unteren stationären Tisch die Vorschubwalzen oder -rollen drehbar gelagert, durch welche die ankommenden Furniere in die Maschine hinein- und in dieser an die rückseitige Stirnkante eines vorhergehenden Furnierblattes angedrückt werden. Dabei ist es auch bekannt, im Maschinenoberteil eine Gegendruckwalze o. dgl. anzuordnen, um einen ausreichenden Vorschub des einlaufenden Furnieres zu gewährleisten.In such a assembling machine known from DE-A-949 433, the feed rollers or rollers are rotatably mounted on a lower stationary table, by means of which the incoming veneers are pressed into the machine and pressed against the rear end edge of a previous veneer sheet. It is also known to arrange a counter-pressure roller or the like in the machine upper part in order to ensure a sufficient advance of the incoming veneer.

Bei einer üblichen starren Lagerung der oberen Gegendruckwalze ist die ungenaue Anpassung des Abstandes der beiden sich gegenüberliegenden Walzen innerhalb der Dickentoleranzen der Furniere nachteilig, so daß oftmals die Furniere nur unvollständig und ungleichmäßig gefördert oder aber beschädigt werden.In the case of a conventional rigid mounting of the upper counter-pressure roller, the inaccurate adjustment of the distance between the two opposing rollers within the thickness tolerances of the veneers is disadvantageous, so that the veneers are often only incompletely and unevenly conveyed or damaged.

Aufgabe der Erfindung ist es, eine gattungsgemäße Furnier-Zusammensetzmaschine mit einer oberen Gegendruckwalze auszustatten, die mit ihrem Umfang elastisch die Oberfläche des einlaufenden Furnieres berührt und damit die Nachteile bekannter Maschinen vermeidet. Dabei soll die Lagerung einer derartigen Gegendruckwalze innerhalb eines senkrecht verschiebbaren Andruckstempels derart verbessert werden, daß dieser sich feinfühlig auf die Oberfläche der benachbarten Furniere einstellt, um diese zu pressen und deren Leim zum Stumpfverleimen zu aktivieren.The object of the invention is to provide a generic veneer splicing machine with an upper counter-pressure roller, which with its The circumference resiliently touches the surface of the incoming veneer and thus avoids the disadvantages of known machines. The storage of such a counter-pressure roller within a vertically displaceable pressure stamp should be improved in such a way that it adjusts itself delicately to the surface of the adjacent veneers in order to press them and to activate their glue for glue gluing.

Gemäß der Erfindung wird diese Aufgabe bei einer Furnier-Zusammensetzmaschine der vorgenannten Gattung durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.According to the invention, this object is achieved in a veneer assembly machine of the aforementioned type by the characterizing features of claim 1.

Bei einer derartigen Ausführung ist somit die Oberfläche (der Mantel) der Gegendruckrolle abstandsmäßig in gewissen Grenzen gegenüber der inneren Antriebswelle veränderbar, so daß die Oberfläche feinfühlig auf unterschiedliche Dicken einlaufender Furniere anspricht.In such an embodiment, the surface (the casing) of the counterpressure roller can thus be spaced apart within certain limits with respect to the inner drive shaft, so that the surface responds sensitively to different thicknesses of incoming veneers.

Bei der Gegendruckrolle ist hierbei zwischen der inneren Antriebswelle und dem äußeren Rohr als Mantel eine Einrichtung zur Übertragung der von der Antriebswelle ausgehenden Umfangskraft auf das äußere Rohr vorgesehen.In the case of the counterpressure roller, a device for transmitting the circumferential force emanating from the drive shaft to the outer tube is provided between the inner drive shaft and the outer tube.

Bei einer bevorzugten Ausführung sind auf der Innenseite des Rohres zwei zur Rohrlängsseite parallel verlaufende, sich spiegelbildlich gegenüberliegende Längsnuten vorgesehen, und die Antriebswelle hat Durchgangsbohrungen, durch die jeweils ein Mitnahmebolzen gesteckt ist, dessen Spitze in mindestens einen Längsnut eingreift.In a preferred embodiment, on the inside of the tube, two longitudinal grooves running parallel to the longitudinal side of the tube, which are opposite each other in mirror image, are provided, and the drive shaft has through-bores through which a driving pin is inserted, the tip of which engages in at least one longitudinal groove.

Weitere Merkmale ergeben sich aus den Unteransprüchen.Further features emerge from the subclaims.

Der Schutz erstreckt sich nicht nur auf die Einzelmerkmale, sondern auch auf deren Kombination.The protection extends not only to the individual features, but also to their combination.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispieles in Verbindung mit der Zeichnung beschrieben. Es zeigt:

Fig. 1
eine Teil-Seitenschnittansicht des Arbeitsbereiches einer Vorrichtung zum Zusammensetzen von Furnieren mit erfindungsgemäßer Gegendruckwalze
Fig, 2
einen Teil-Längsschnitt durch eine Gegendruckwalze mit darunter angeordneter Transport- bzw. Anpreßrolle
Fig. 3
einen Schnitt durch die Gegendruckwalze entsprechend Linie III - III in Fig. 2 .
The invention is described below using an exemplary embodiment in conjunction with the drawing. It shows:
Fig. 1
a partial side sectional view of the working area of a device for assembling veneers with a counter-pressure roller according to the invention
Fig. 2
a partial longitudinal section through a counter-pressure roller with a transport or pressure roller arranged underneath
Fig. 3
a section through the back pressure roller according to line III - III in Fig. 2nd

Eine Vorrichtung zum Zusammensetzen von Furnieren weist einen unteren stationären Tisch (10) und einen oberen Andruckstempel (11) auf. An der Einlaufseite A ist eine Gegendruckwalze (12) im(am oberen Andruckstempel (11) - auch eine Lagerung in/an einem darüber angeordneten Profilrohr (28) ist möglich - und eine Transport- bzw. Anpreßrolle (13) am Tisch (10) gelagert. Diese Transportrolle (13) ist in bekannter und üblicher Art und Weise aufgebaut, so daß sich eine weitere Beschreibung erübrigt. Der Andruckstempel (11) ist in vertikaler Richtung bewegbar, um ein in Transportrichtung A eingeführtes Furnier (16) zu fördern bzw. zu klemmen.A device for assembling veneers has a lower stationary table (10) and an upper pressure stamp (11). On the inlet side A there is a counter pressure roller (12) in (on the upper pressure stamp (11) - storage in / on a profile tube (28) arranged above it is also possible - and a transport or pressure roller (13) on the table (10) This transport roller (13) is constructed in a known and customary manner, so that a further description is unnecessary The pressure stamp (11) can be moved in the vertical direction in order to convey or insert a veneer (16) introduced in the transport direction A to pinch.

Im mittleren Bereich weisen der Tisch (10) und der Andruckstempel (11) jeweils eine Heizeinrichtung (14, 15) auf, die jeweils allein oder zusammen ebenfalls vertikal verfahrbar sind, so daß diese im Stirnkantenbereich der benachbarten Furniere (16) in Anlage an ein Furnierblatt (16) bewegt werden können, um mittels Druck und Wärme zu verleimen.In the central area, the table (10) and the pressure plunger (11) each have a heating device (14, 15), each of which can also be moved vertically on its own or together, so that it touches the front edge area of the adjacent veneers (16) Veneer sheet (16) can be moved to glue by means of pressure and heat.

Im Auslaufbereich des Tisches (10) sind weiterhin Bremsstempel (17) gelagert, die über eine Druckeinrichtung (18) betätigbar sind, um das Furnier (16) zu halten bzw. abzubremsen.In the outlet area of the table (10) there are furthermore brake stamps (17) which can be actuated by a pressure device (18) in order to hold or brake the veneer (16).

An der Einlaufseite A des Tisches (10) endet ein Einlaufförderband (19), auf welchem die zu verleimenden Furnierstreifen zugeführt werden. In analoger Weise schließt sich an die Auslaufseite des Tisches (10) ein Auslaufförderband (20) an, um die miteinander verleimten Furnierblätter abzutransportieren.At the inlet side A of the table (10) ends an inlet conveyor belt (19) on which the veneer strips to be glued are fed. An outlet conveyor belt (20) connects to the outlet side of the table (10) in an analogous manner in order to remove the veneer sheets glued together.

Die Transport- bzw. Anpreßrolle (13) ist an dem Tisch (10) gelagert und wird mittels eines nicht dargestellten Antriebs angetrieben.The transport or pressure roller (13) is mounted on the table (10) and is driven by a drive, not shown.

Die gesamte Gegendruckwalze (12) wird von mehreren, einzeln hintereinander in einem Abstand zueinander um eine zentrale Antriebswelle (21) gelagerten Einzeldruckrollen (22) gebildet. Die Welle (21) ist dabei (in nicht dargestellter Weise) mit einem Antrieb verbunden, so daß diese, wie dargestellt, im Uhrzeigersinn drehbar ist.The entire counter-pressure roller (12) is formed by a plurality of individual pressure rollers (22) mounted one behind the other at a distance from one another around a central drive shaft (21). The shaft (21) is connected (in a manner not shown) to a drive, so that it can be rotated clockwise as shown.

Jede Einzeldruckrolle (22) ist ein im Querschnitt kreisförmiges Rohr, von dessen innerer Oberfläche aus zwei zur Rohrlängsachse parallel verlaufende, sich spiegelbildlich gegenüberliegende, über die gesamte Rohrlänge nach außen zur äußeren Rohroberfläche hinweisende Längsnuten (23) ausgehen. Die Welle (21) ist dabei im Rohr angeordnet, einerseits stirnseitig gelagert (nicht dargestellt), andererseits stirnseitig mit einem Antrieb (ebenfalls nicht dargestellt) verbunden. Sie weist auf dem Teil ihrer Länge, der jeweils von dem kreisförmigen Rohr umgeben ist, zwei in einem Abstand zueinander zur Wellenlängsachse in einem rechten Winkel verlaufende Durchgangsbohrungen (24) auf. Durch diese Bohrungen (24) sind - mit Spiel - Mitnahmebolzen (25) gesteckt, deren Länge geringfügig kleiner ist als der Abstand von Längsnutengrund zu Längsnutengrund.Each individual pressure roller (22) is a tube with a circular cross-section, from the inner surface of which two longitudinal grooves (23), which run parallel to the longitudinal axis of the tube and are opposite each other in mirror image, point out over the entire length of the tube to the outside of the outer tube surface. The shaft (21) is arranged in the tube, on the one hand mounted on the end face (not shown), on the other hand connected to a drive (also not shown) on the end face. It points to the part of its length, each of the circular tube is surrounded by two through bores (24) at a right angle to one another to the longitudinal axis of the shaft. Through these holes (24) - with play - drive pins (25) are inserted, the length of which is slightly less than the distance from the bottom of the longitudinal groove to the bottom of the longitudinal groove.

Die Breite der beiden sich gegenüberliegenden Längsnuten (23) ist größer (ca. zwei- bis dreimal) als der Durchmesser des Mitnahmebolzens (25). Da der Durchmesser der Welle (21) kleiner ist als der Innendurchmesser der Rolle (22), ergibt sich bei koaxialer Lage von Welle (21) und Rolle (22) ein zwischen äußerer Wellen- und innerer Rollenoberfläche ringförmig axial und radial verlaufender, gleichförmiger Freiraum (26). Daraus folgert, daß bei heruntergefahrenem Andruckstempel (11) und somit beim Transport eines Furnierblattes durch Anpreßrolle (13) und Gegendruckwalze (12) zur Anlage gegen ein mittels der Bremsstempel (17) gehaltenes, vorhergehendes Furnierblatt sich, obwohl gemeinsam auf der zentralen Antriebswelle (21) angeordnet, die Einzeldruckrollen (22) der Gegendruckwalze (12) den unterschiedlichen Furnierdicken entlang eines Furnierblattes individuell anpassen können. Somit ist ein kontinuierlicher Weitertransport und Andruck des Furnierblattes zur Anlage gegen ein vorhergehendes gewährleistet, wobei bei einer größeren Furnierdicke insgesamt gegenüber einer kleineren auch die Gegendruckwalze (12) entsprechend höher angeordnet ist.The width of the two opposing longitudinal grooves (23) is larger (about two to three times) than the diameter of the driving pin (25). Since the diameter of the shaft (21) is smaller than the inside diameter of the roller (22), a coaxial position of the shaft (21) and roller (22) results in a uniform free space running in a ring, axially and radially between the outer surface of the shaft and the inner roller (26). From this it follows that when the pressure stamp (11) is lowered and thus when a veneer sheet is transported by the pressure roller (13) and the counterpressure roller (12) to bear against a previous veneer sheet held by the brake stamp (17), although together on the central drive shaft (21 ) arranged, the individual pressure rollers (22) of the counter-pressure roller (12) can individually adapt to the different veneer thicknesses along a veneer sheet. This ensures continuous transport and pressure of the veneer sheet against the previous one, with a larger veneer thickness overall, the counterpressure roller (12) is also arranged correspondingly higher than a smaller one.

Analog der individuellen Anpassung an die unterschiedlichen Furnierdicken längs eines Furnierblattes wird bei einer Einzeldruckrolle (22), die nicht in Kontakt mit einem Furnierblatt steht, der Abstand zwischen ihr und der darunter angeordneten Transport- bzw. Anpreßrolle (13) gleich null sein, die obere Walze (12) liegt auf der unteren (13) auf. Beide rollen sich gegenseitig aufeinander ab (s. Fig. 2).Analogous to the individual adaptation to the different veneer thicknesses along a veneer sheet, the distance between it and a transport or pressure roller (13) arranged below it will be zero for a single pressure roller (22) that is not in contact with a veneer sheet Roller (12) rests on the lower one (13). Both roll on each other (see Fig. 2).

Die Vorrichtung zum Zusammensetzen von Furnieren arbeitet wie im folgenden beschrieben:The device for assembling veneers works as follows:

In dem in Fig. 1 dargestellten linken Bereich der Vorrichtung wird ein breites vorbeleimtes Furnierblatt (16) eingeführt, wobei zusätzlich Anschlagstifte (27), die am Tisch (10) gelagert sind, nach oben gefahren werden können, um das Furnierblatt (16) bzw. dessen hintere Kante exakt zu positionieren. Nachfolgend wird über das Einlauf-Förderband (19) und die Transport- bzw. Aupreßrolle (13) ein Furnier zugeführt, das, nachdem die Anschlagstifte (27) aus der Transportbahn entfernt wurden, gegen das bereits vorhandene Furnierblatt (16) und durch Bremsstempel (17) zur Anlage gebracht wird. Hierbei bildet sich zwischen den Heizeinrichtungen ein waagerechter Schacht, in dem das nachfolgende Furnier durch Transport- bzw. Anpreßrolle (13) und Gegendruckwalze (12) an das vorhergehende Furnierblatt fest angedrückt wird. Anschließend werden die obere und die untere Heizeinrichtung (14, 15) mit Druck und Wärme aktiviert, um den beim Zutransport des neuen Furnieres auf dessen Klebekante aufgebrachten Klebstoff mit dem anderen Furnierblatt (16) zu verkleben. Dabei wird der notwendige Anpreßdruck zwischen den Furnieren durch die Transport- bzw. Anpreßwalze (13) sowie die zugehörige Gegendruckwalze (12) erzeugt und aufrechterhalten. Nach einer vorbestimmten Einwirkzeit erfolgt eine Freigabe und ein Weitertransport der miteinander verbundenen Furnierblätter (16).In the left area of the device shown in Fig. 1, a wide pre-glued veneer sheet (16) is introduced, whereby additional stop pins (27), which are mounted on the table (10), can be moved upwards to the veneer sheet (16) or to position its rear edge exactly. A veneer is then fed via the infeed conveyor belt (19) and the transport or pressing roller (13), which, after the stop pins (27) have been removed from the transport path, against the already existing veneer sheet (16) and by means of brake stamps ( 17) is brought to the plant. Here, a horizontal shaft is formed between the heating devices, in which the following veneer is pressed firmly against the previous veneer sheet by means of a transport or pressure roller (13) and counter-pressure roller (12). The upper and lower heating devices (14, 15) are then activated with pressure and heat in order to bond the adhesive applied to the adhesive edge of the new veneer to the other veneer sheet (16) when the new veneer is transported to it. The necessary contact pressure between the veneers is generated and maintained by the transport or contact roller (13) and the associated counter-pressure roller (12). After a predetermined exposure time, the interconnected veneer sheets (16) are released and transported onward.

Die Bewegbarkeit der Heizeinrichtungen (14, 15) des Andruckstempels (11) und Tisches (10) sowie des darüber angeordneten, in etwa der Arbeitsbreite der Vorrichtung entsprechenden Profilrohres (28) kann in bekannter Weise durch Antriebselemente wie z. B. Druckmittelzylinder (29) und/oder Pleuelstange (nicht dargestellt) und/oder Zahnstange (ebenfalls nicht dargestellt) o. dgl. erreicht werden.The movability of the heating devices (14, 15) of the pressure plunger (11) and table (10) and of the profile tube (28) arranged above them, which corresponds approximately to the working width of the device, can be achieved in a known manner by drive elements such as B. pressure medium cylinder (29) and / or connecting rod (not shown) and / or rack (also not shown) o.

Bei dem in Fig. 1 dargestellten Ausführungsbeispiel ist das in Querrichtung sich erstreckende Profilrohr (28) mittels einer nicht dargestellten Hubeinrichtung in der Höhe in größeren Bereichen verstellbar gelagert. An diesem Profilrohr (28) liegen seitlich Führungsleisten (30) an, die mittels seitlich an dem Profilrohr (28) drehbar gelagerter Rollen (31) geführt und mittels seitlicher Druckmittelzylinder (29 a) in einem kleineren Bereich höhenverschiebbar sind. Diese Führungsleisten (30) halten an ihren unteren Enden den blockförmigen Andruckstempel (11), in dem - wie bereits vorbeschrieben - ein-laufseitig exzentrisch die Gegendruckwalze (12) gelagert ist.In the embodiment shown in FIG. 1, the profile tube (28), which extends in the transverse direction, is height-adjustable in larger areas by means of a lifting device, not shown. On this profile tube (28) there are lateral guide strips (30) which are guided by means of rollers (31) which are rotatably mounted on the side of the profile tube (28) and which are height-adjustable in a smaller area by means of lateral pressure medium cylinders (29 a). These guide strips (30) hold at their lower ends the block-shaped pressure stamp (11), in which - as already described - the counter-pressure roller (12) is eccentrically mounted on the one-side.

Dieser Andruckstempel (11) klemmt mit größerer Kraft sowohl das einlaufende Furnier als auch das bereits durchgelaufene Furnierblatt auf dem Tisch (10) fest, wobei die Anschlagstifte (27) nach unten abgesenkt sind und die benachbarten Stirnkanten des Furnieres bzw. des Furnierblattes sich aneinander genähert haben. Auch der Bremsstempel (17) hat sich dadurch abgesenkt.This pressure stamp (11) clamps with greater force both the incoming veneer and the veneer sheet that has already passed through on the table (10), the stop pins (27) being lowered downward and the adjacent end edges of the veneer or veneer sheet approaching one another to have. The brake plunger (17) has also been lowered as a result.

Der blockförmige Andruckstempel hat eine zentrische und schlitzartige Öffnung (34), in welcher eine Heizplatte (32) gesondert gelagert ist, die mittels einer Hubstange (33) mit gesondert gesteuertem Hubzylinder (29 b) o. dgl. senkrecht verschiebbar ist.The block-shaped pressure stamp has a central and slot-like opening (34), in which a heating plate (32) is mounted separately, which can be moved vertically by means of a lifting rod (33) with a separately controlled lifting cylinder (29 b) or the like.

Zum Stumpfverleimen der benachbarten sich jetzt berührenden Stirnkanten des Furnieres und des Furnierblattes drückt die schmale Heizplatte (32) auf diesen Stirnkantenbereich, so daß das Verleimen unter gewissem Druck und Wärme erfolgt.In order to glue the adjacent end edges of the veneer and the veneer sheet, which are now touching, the narrow heating plate (32) presses on this end edge region, so that the gluing takes place under a certain pressure and heat.

Zum Weiterbefördern des Furnierblattes fährt der Andruckstempel (11) aufwärts und gibt den Einlaufspalt frei.To move the veneer sheet further, the pressure stamp (11) moves upwards and releases the inlet gap.

Der Andruckstempel (11) kann mit den beiden Führungsleisten (30) fest verschraubt sein; diese beiden Teile können aber auch aus einem Werkstück bestehen.The pressure stamp (11) can be firmly screwed to the two guide strips (30); these two parts can also consist of a workpiece.

Der Andruckstempel (11) kann bei einem anderen Ausführungsbeispiel in seiner Mitte in seiner Längsrichtung geteilt und somit zweistückig sein und die Heizeinrichtung mittig zwischen sich aufnehmen. Dabei kann die Höhenbewegung jedes Teiles des Andruckstempels (11) mit jeweiliger Führungsleiste (30) unterschiedlich gesteuert sein.In another exemplary embodiment, the pressure stamp (11) can be divided in its middle in its longitudinal direction and thus be in two pieces and accommodate the heating device in the middle between them. The height movement of each part of the pressure stamp (11) can be controlled differently with the respective guide bar (30).

Auf die Breite der gesamten Zusammensetzmaschine sind viele kurze Andruckstempel (11) beidseitig der mittleren Heizeinrichtung nebeneinander angeordnet.Many short pressure stamps (11) are arranged alongside one another on both sides of the central heating device across the width of the entire assembly machine.

Claims (14)

  1. A machine for assembling strips of veneer
    - having transport means (19, 20) for strips of veneer (16) mounted in a machine frame; and
    - having a pressure stamp (11),
    which is disposed in the region of the strips of veneer (16) adjacent to the front edges to be butt-bonded,
    which is provided with heating devices (14, 15), and
    in which is disposed a counter-pressure roller (12), which comprises a drive shaft (21 and also an external pipe (22) as a shell, the surface of which lies plane with the surface of the pressure stamp (11) or protrudes slightly with respect thereto,
    characterised
    - in that the external pipe (22) forming the shell is held at a variable distance with respect to the inner drive shaft (21),
    - in that the shell (22) is mounted, with clearance, floating in the direction of the pressing force on the drive shaft (21) and produces the pressure on the workpiece (16) and
    - in that a device (23, 24, 25) is provided for torque transmission from the drive shaft (21) to the pipe (22).
  2. A machine for assembling strips of veneer according to Claim 1,
    characterised in that on the inside of the pipe (22) are provided two longitudinal grooves (23) extending parallel to the longitudinal side of the pipe and lying opposite one another in a mirror image, and in that the drive shaft (21) disposed in the pipe (22) comprises several through-bores (24) extending at right angles to the longitudinal axis of the shaft at a certain distance from one another, through which a retaining bolt (25) is placed, the length of which is slightly less than the distance from one base of a longitudinal groove to another.
  3. A machine for assembling strips of veneer according to one of Claims 1 or 2,
    characterised in that the width of the two opposite longitudinal grooves (23) is greater than the diameter of the retaining bolt (25).
  4. A machine for assembling strips of veneer according to one of Claims 1 to 3,
    characterised in that the counter-pressure roller (12) is formed by several individual pressure rollers disposed individually one behind the other at a distance from one another on a central drive shaft (21).
  5. A machine for assembling strips of veneer according to one of Claims 1 to 4,
    characterised in that between the drive shaft (21) and the inner face of the pipe (22) is provided an annular, axially and radially extending clearance (26).
  6. A machine for assembling strips of veneer according to one of Claims 1 to 5,
    characterised in that on the inlet side the counter-pressure roller (12) is rotatably mounted eccentrically in the pressure stamp (11) in a retention space.
  7. A machine for assembling strips of veneer according to one of Claims 1 to 6,
    characterised in that the pressure stamp (11) is displaceably mounted in the machine frame.
  8. A machine for assembling strips of veneer according to one of Claims 1 to 7,
    characterised in that the pressure stamp (11) is provided with lateral guide strips (30), which abut a transverse through section (28) in the machine frame.
  9. A machine for assembling strips of veneer according to one of Claims 1 to 8,
    characterised in that the guide strips (30) are movably mounted by means of a lifting device (29 a).
  10. A machine for assembling strips of veneer according to one of Claims 1 to 9,
    characterised in that the transverse section (28) is displaceably mounted in the machine frame by means of a separate lifting device.
  11. A machine for assembling strips of veneer according to one of Claims 1 to 10,
    characterised in that the pressure stamp (11) comprises a central aperture (34), in which a heating block (32) is displaceably spring-mounted.
  12. A machine for assembling strips of veneer according to one of Claims 1 to 11,
    characterised in that the heating block (32) is mounted in a vertically displaceable manner by means of a lifting device (29 b).
  13. A machine for assembling strips of veneer according to one of Claims 1 to 12,
    characterised in that in the region of the heating block (32) is displaceably mounted a positioning pin (27) which can be lowered into the table.
  14. A machine for assembling strips of veneer according to one of Claims 1 to 13,
    characterised in that the pressure stamp (11) is divided longitudinally.
EP90108180A 1989-05-02 1990-04-28 Machine for assembling strips of veneer Expired - Lifetime EP0396072B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8905533U 1989-05-02
DE8905533U DE8905533U1 (en) 1989-05-02 1989-05-02 Veneer splicing machine

Publications (3)

Publication Number Publication Date
EP0396072A2 EP0396072A2 (en) 1990-11-07
EP0396072A3 EP0396072A3 (en) 1991-08-28
EP0396072B1 true EP0396072B1 (en) 1994-02-02

Family

ID=6838882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108180A Expired - Lifetime EP0396072B1 (en) 1989-05-02 1990-04-28 Machine for assembling strips of veneer

Country Status (4)

Country Link
US (1) US5310444A (en)
EP (1) EP0396072B1 (en)
DE (2) DE8905533U1 (en)
ES (1) ES2050868T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8905533U1 (en) * 1989-05-02 1989-08-31 Heinrich Kuper GmbH & Co KG, 4835 Rietberg Veneer splicing machine
JP4960110B2 (en) * 2006-04-19 2012-06-27 スミダコーポレーション株式会社 Transformer device and drive circuit thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604128A (en) * 1948-09-07 1952-07-22 Buss Machine Works Planer feed roll
GB745453A (en) * 1953-06-25 1956-02-29 Gerardus Johannes Maria Kok Improvements in or relating to the edgewise joining of sheets
DE949433C (en) * 1953-06-30 1956-09-20 Hans Roever Machine for assembling and joining wood veneers or other flat workpieces
DE1152527B (en) * 1960-05-27 1963-08-08 Hans Roever Machine for assembling and joining wood veneers or other flat workpieces
CH429121A (en) * 1965-06-04 1967-01-31 Fischer Ag Brugg Georg Veneer loading device for a veneer splicing machine for gluing veneers
GB1546778A (en) * 1975-06-10 1979-05-31 Agfa Gevaert Rotatable pressure means with adjustable pressure length
CH659617A5 (en) * 1983-05-04 1987-02-13 Fischer Ag Brugg Georg DEVICE FOR ASSEMBLING AND CONNECTING LARGE WORKPIECES.
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.
DE8905533U1 (en) * 1989-05-02 1989-08-31 Heinrich Kuper GmbH & Co KG, 4835 Rietberg Veneer splicing machine

Also Published As

Publication number Publication date
EP0396072A3 (en) 1991-08-28
EP0396072A2 (en) 1990-11-07
DE59004466D1 (en) 1994-03-17
US5310444A (en) 1994-05-10
ES2050868T3 (en) 1994-06-01
DE8905533U1 (en) 1989-08-31

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