EP1698738B1 - Lightweight building panel and method of production - Google Patents

Lightweight building panel and method of production Download PDF

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Publication number
EP1698738B1
EP1698738B1 EP05012695A EP05012695A EP1698738B1 EP 1698738 B1 EP1698738 B1 EP 1698738B1 EP 05012695 A EP05012695 A EP 05012695A EP 05012695 A EP05012695 A EP 05012695A EP 1698738 B1 EP1698738 B1 EP 1698738B1
Authority
EP
European Patent Office
Prior art keywords
profile strip
lightweight panel
groove
lightweight
process according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05012695A
Other languages
German (de)
French (fr)
Other versions
EP1698738A3 (en
EP1698738A2 (en
Inventor
Dieter Bauer
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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Publication date
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Application filed by Rehau AG and Co filed Critical Rehau AG and Co
Priority to PL05012695T priority Critical patent/PL1698738T3/en
Publication of EP1698738A2 publication Critical patent/EP1698738A2/en
Publication of EP1698738A3 publication Critical patent/EP1698738A3/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
    • E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/239—Complete cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/24992—Density or compression of components

Definitions

  • the invention relates to a lightweight board according to the preamble of claim 18 and a method for their preparation according to the preamble of claim 1.
  • a generic lightweight board or a generic manufacturing process is made WO 01/07725 A1 known.
  • a lightweight board in which a core of at least two plates is covered on two of its sides.
  • This lightweight board has on its Lekssstimate a holding and end profile, which has a base part with a viewing or connection surface and one of these opposite cover surface and with an anchoring device which is arranged on the cover surface and engages in the assembled state in the core of the lightweight panel.
  • This retaining and closing profile is pressed into the longitudinal end faces of the lightweight board, wherein the core of the lightweight board is damaged at this point and the holding and closing profile is glued to the anchoring device arranged on the adhesive with the cover layers of the lightweight board.
  • Another lightweight board is in the DE 103 13 055 A1 described.
  • the method for producing this lightweight board should be characterized in that an adhesive layer is applied in the pass on a first side core layer and the first side of the core layer is combined with a first cover layer, applied to a second side of the core layer, an adhesive layer and the second side of the core layer is brought together with a second cover layer and the cover layers are pressed with the core layer.
  • this lightweight board arranged at least in the region of longitudinal end faces of the lightweight panel, can be arranged with the top layers glued frame latch.
  • the lightweight board described can thus be produced on the one hand without arranged on the longitudinal end faces frame latch, as well as with this longitudinal end side arranged frame bolts.
  • the lightweight board is thus built on the one hand with unprotected longitudinal end faces or on the other hand made with dimensioned on the cross section and the geometry of the lightweight board frame bars that cover the longitudinal end faces.
  • a disadvantage of this method is seen that the production should indeed work in a continuous, but each lightweight panel must be installed as a single piece step by step.
  • the invention provides the lightweight board according to claim 18 and the method for producing this lightweight board according to claim 1 ready.
  • the method for producing a lightweight panel according to the invention comprises a first method step, in which a groove is introduced into at least one longitudinal end face of the lightweight board, wherein in a second method step, a first profile strip is introduced into the groove of the lightweight board, in a third step via the groove of the Lightweight panel protruding profile strip is removed and in a fourth process step, a second profile rope is applied to the previously removed profile strip.
  • the first profile strip is made of a microporous foam structure.
  • the profile strip which is introduced into the groove of the lightweight board and removed, has a lower density than the subsequently applied profile strip.
  • the use of a thermoplastically processable material with a lower density positively influences the weight of the lightweight panel according to the invention; on the other hand, it has surprisingly been found that mechanical removal, such as, for example, milling off the part of the profile strip protruding beyond the groove of the lightweight panel , in the continuous process results in an enlargement of the surface of the profile strip, through which the subsequent application of a further profile strip can be realized fully automatically, quickly and cohesively.
  • Foam structure is exposed, which can be referred to as perforated-porous, so that the bonding of the subsequently applied profile strip, which generally has a decor analogous to the cover layers of the lightweight board, by the mechanical removal of the projecting over the groove of the lightweight board profile strip Penetration of the adhesive into the perforated-porous surface of the milled lower profile list is significantly improved. Due to this microporous structure, the profile strip on its surface openings, which are partially undercut. As a result, bonding qualities can be achieved which are comparable to the known bonds of, for example, thermoplastically processable edge strips on the longitudinal end faces of, for example, chipboard.
  • thermoplastically processable profile strips when using a profile strip to be introduced into the groove of the lightweight board with a structured surface which advantageously has a surface roughness of about 5 ⁇ m to 40 ⁇ m, preferably 10 ⁇ m to 25 ⁇ m, also a very good adhesive bond between the thermoplastically processable profile strips can be realized. Due to the differently adjustable structured surface, which can be realized by various possibilities in the manufacturing process for the profile strip to be introduced into the groove of the lightweight board, such. B.
  • This primer system is selected from the group of polyolefins, polystyrenes, styrene copolymers, polyvinyl chlorides, polycarbonates, polyesters, polyamides, ethylene vinyl acetates or the like, wherein the primer system and an adhesive system used with the thermoplastically processable materials of the moldings can be adjusted so that an optimal Bonding quality and optimal appearance of the lightweight panel according to the invention can be realized.
  • the primer system can be used only when needed and dimensioned accordingly.
  • the profile strip to be introduced into the groove of the lightweight board can be made of a recycled thermoplastically processable material, which further positively influences the cost and economic efficiency of the lightweight board.
  • the profile strip to be introduced into the groove of the lightweight board is dimensioned such that it can be introduced into the groove in a force-fit manner.
  • the next profile strip which has the decor, are also adhesively bonded adhesively with this introduced in the groove of the lightweight panel lower profile strip.
  • the surface of the profile strip introduced into the groove of the lightweight board for optimizing an adhesive bond by, for example, a flame treatment, a corona discharge, a plasma treatment, but also a primer coating can be optimized, so that a targeted activation of the surface of the profile strip takes place.
  • the profile strip, which is to be applied to the profile strip introduced in the groove of the lightweight board has a corresponding surface activation on its surface facing this profile strip in order to optimize the adhesive bond.
  • Another advantage of the lightweight panel according to the invention is seen in the fact that the existing of a thermoplastically processable material profile strips in the known extrusion or coextrusion and produced economically on rolls with about 100 m in length are available, so that in the manufacture of lightweight board according to the invention a continuous and characterized by low machine downtime production is possible. Due to the advantageous use of existing from thermoplastically processable moldings the longitudinal end faces of the lightweight panel according to the invention can be quasi sealed, as a double closure is carried by the two applied moldings. The profile strips themselves are moisture insensitive due to their material-specific properties, do not swell and do not corrode, so that this affects the lightweight board according to the invention in their intended use accordingly positive and different from the prior art.
  • the profile strips cover all longitudinal edge sides of the lightweight board, so that a comprehensive protection can be realized.
  • FIG. 1 a is a perspective view of a lightweight panel 1 according to the invention shown.
  • the lightweight board 1 has a quadrangular cross-section and consists in this embodiment of the two opposite thin-walled Cover layers 2, 3, which are arranged approximately parallel to each other. Between the cover layers 2, 3 a core layer 4 connected to these is arranged, which in this embodiment has an approximately S-shaped structure, but also a honeycomb structure with a corresponding high void content is possible and wherein this core layer 4, for example, of paper or the like Materials can be made.
  • a groove 5 was introduced in a front side 11 of the lightweight panel 1. This groove 5 is advantageously introduced by a milling in the end face 11 of the lightweight board 1.
  • the groove 5 is dimensioned so that in each case an approximately L-shaped recess is formed in the thin-walled cover layers 2, 3, the openings of which lie opposite each other.
  • the groove 5 is not formed as in this embodiment L-shaped or at right angles in the cover layers 2, 3, but also at an acute or obtuse angle relative to the longitudinal side of the cover layer 2, 3.
  • a profiled strip 6 is introduced, which is adhesively connected in this embodiment by an adhesive bond with the approximately L-shaped recess of the cover layers 2, 3.
  • the profile strip 6 is made for example of a recycled styrene copolymers in a conventional extrusion process.
  • the thickness of the profiled strip 6 corresponds approximately to twice the depth of the groove 5 of the lightweight building board 1.
  • the lightweight building board 1 is guided on one of the cover layers 2, 3 past a profile rail bander known per se, so that the profiled strip 6 is continuous and fully automatically inserted into the groove 5 of the lightweight panel 1.
  • the closed with the profile strip 6 longitudinal end side 11 of the lightweight panel 1 is passed in a further process step on a known milling machine, so that over the groove 5 of the lightweight panel 1 protruding part of the profile strip 6 flushed to the end face 11 of the lightweight panel 1 becomes.
  • a full-surface closed by the milled profile strip 6 end face 11 of the lightweight panel 1 is achieved, which has an optimum surface for the application of a next profile strip 7 due to the foam structure of the profile strip 6.
  • the lightweight panel 1 according to the invention is shown, wherein the inserted into the groove 5 of the lightweight panel 1 profile strip 6 is flush with the end face 11 of the lightweight panel 1.
  • the profile strip 7 is applied, which has a decor on its side facing away from the front side 11 of the lightweight panel 1 a decor which, for example, analogous to the decor of the cover layers 2, 3 of the lightweight panel. 1 is.
  • an adhesive system such as a hot melt adhesive from the group of polyurethanes applied and in a next step, the profile strip 7 is applied.
  • the profile strip 7 is generally dimensioned somewhat wider than the end face 11 of the lightweight board 1, so that production-related tolerances in the production of the lightweight board 1 can be compensated.
  • the profile strip 7 is a so-called "double" closure of the lightweight board 1, with which the core layer 4 is protected from possible external influences.
  • the thus achievable adhesive force of the adhesive bond between the profile strip 6 and the profile strip 7 is greater than the tensile strength of the thermoplastically processable material of the profile strip 6, the 7th
  • the lightweight panel 1 according to the invention is shown, in which over the longitudinal end face 11 of the lightweight panel 1 protruding edges of the profile strip 7 are flush with the cover layers 2, 3 and the approximately prismatic cross-section of the profile strip 7 provided at their upper edges with an additional optically demanding radius is.
  • Another advantage of the use of thermoplastically processable profiled strips 6, 7 is seen in the fact that it is only possible in the prior art to produce angular lightweight panels 1, since the frame bars used for required free forms, such as radii, circular lightweight panels 1 etc ., are not usable. However, it is also within the scope of the invention that further end faces 11 'of the lightweight board depending on the requirement profile with such profiled strips 6, 7 are sealingly closed.

Abstract

The method involves having two thin-walls (2, 3) and arranged between the walls is a connected core (4). A groove (5) is brought into a longitudinal face (11) of the light-weight precast plate (1). A profiled strip (6) is applied into the groove of the light-weight precast plate. Another profiled strip (7) is then applied on the profile strip. An independent claim is included for a light-weight precast plate.

Description

Die Erfindung betrifft eine Leichtbauplatte nach dem Oberbegriff des Anspruchs 18 und ein Verfahren zu ihrer Herstellung nach dem Oberbegriff des Anspruchs 1.The invention relates to a lightweight board according to the preamble of claim 18 and a method for their preparation according to the preamble of claim 1.

Eine gattungsgemäße Leichtbauplatte bzw. ein gattungsgemäßes Herstellungsverfahren ist aus WO 01/07725 A1 bekannt.A generic lightweight board or a generic manufacturing process is made WO 01/07725 A1 known.

Aus der DE 19506158 A1 ist eine Leichtbauplatte bekannt, bei der ein Kern von zumindest zwei Platten an zwei seiner Seiten abgedeckt ist. Diese Leichtbauplatte weist an ihren Längsstimseiten ein Halte- und Abschlussprofil auf, welches ein Basisteil mit einer Sicht- bzw. Anschlussfläche und einer dieser gegenüberllegende Abdeckfläche aufweist und mit einer Verankerungseinrichtung, die an der Abdeckfläche angeordnet ist und im Montagezustand in den Kern der Leichtbauplatte eingreift. Dieses Halte- und Abschlussprofil wird in die Längsstirnseiten der Leichtbauplatte eingepresst, wobei der Kern der Leichtbauplatte an dieser Stelle beschädigt ist und das Halte- und Abschlussprofil über den an der Verankerungseinrichtung angeordneten Klebstoff mit den Decklagen der Leichtbauplatte verklebt ist.From the DE 19506158 A1 a lightweight board is known in which a core of at least two plates is covered on two of its sides. This lightweight board has on its Längsstimseiten a holding and end profile, which has a base part with a viewing or connection surface and one of these opposite cover surface and with an anchoring device which is arranged on the cover surface and engages in the assembled state in the core of the lightweight panel. This retaining and closing profile is pressed into the longitudinal end faces of the lightweight board, wherein the core of the lightweight board is damaged at this point and the holding and closing profile is glued to the anchoring device arranged on the adhesive with the cover layers of the lightweight board.

Bei diesem Halte- und Abschlussprofil ist es jedoch nachteilig, dass für jede Geometrie bzw. Raumform der Leichtbauplatte, insbesondere abhängig von der Dicke und vor allem der Toleranz der Decklagen separate Halte- und Abschlussprofile hergestellt werden müssen. Ein weiterer Nachteil bei dieser Leichtbauplatte wird darin gesehen, dass durch das Eindrücken der Verankerungseinrichtung in die Kernlage der Leichtbauplatte ein Aufspreizen bzw. Aufdehnen der Decklagen der Leichtbauplatte erfolgt, welches beispielsweise unterschiedlichen Toleranzen der Verankerungseinrichtung und unterschiedlichen Abständen der einzelnen Decklagen zugeordnet werden muss. Weiterhin nachteilig wird gesehen, dass diese Lösung zu einem möglichen Ablösen der Kernlage von einer oder beider Decklagen führt.In this holding and closing profile, however, it is disadvantageous that for each geometry or spatial form of the lightweight board, in particular depending on the thickness and especially the tolerance of the cover layers separate holding and end profiles must be made. Another disadvantage of this lightweight board is seen in that by pressing the anchoring device into the core layer of the lightweight board spreading or stretching of the cover layers of the lightweight board is done, which must be assigned, for example, different tolerances of the anchoring device and different distances of the individual cover layers. Another disadvantage is seen that this solution leads to a possible detachment of the core layer of one or both cover layers.

Eine weitere Leichtbauplatte ist in der DE 103 13 055 A1 beschrieben. Hier wird ein Verfahren und eine Vorrichtung zur Herstellung einer Leichtbauplatte aus zwei die Plattenober- sowie die Plattenunterseite bildenden dünnwandigen Decklagen und mindestens einer zwischen den Decklagen angeordneten und mit diesen verklebten Kernlagen aus leichtem Füllmaterial beschrieben. Das Verfahren zur Herstellung dieser Leichtbauplatte soll dadurch gekennzeichnet sein, dass im Durchlauf auf eine erste Seite Kernlage eine Klebstoffschicht aufgebracht und die erste Seite der Kernlage mit einer ersten Decklage zusammengeführt wird, auf eine zweite Seite der Kernlage eine Klebstoffschicht aufgebracht und die zweite Seite der Kernlage mit einer zweiten Decklage zusammengeführt wird und die Decklagen mit der Kernlage verpresst werden. Es wird weiterhin beschrieben, dass zur Herstellung dieser Leichtbauplatte zumindest im Bereich von Längsstirnseiten der Leichtbauplatte angeordnete, mit den Decklagen verklebte Rahmenriegel angeordnet sein können. Die beschriebene Leichtbauplatte kann somit einerseits ohne an den Längsstirnseiten angeordnete Rahmenriegel hergestellt werden, als auch mit diesen längsstirnseitigen angeordneten Rahmenriegeln. Die Leichtbauplatte wird somit einerseits mit ungeschützten Längsstirnseiten verbaut bzw. andererseits mit auf den Querschnitt und die Geometrie der Leichtbauplatte dimensionierten Rahmenriegeln hergestellt, welche die Längsstirnseiten bedecken. Nachteilig bei diesem Verfahren wird gesehen, dass die Herstellung zwar im Durchlauf funktionieren soll, jedoch jede Leichtbauplatte als Einzelstück schrittweise montiert werden muss. So ist es insbesondere bei der Verwendung der Rahmenriegel nachteilig, dass diese in ihrer Dimensionierung den Decklagen für die herzustellende Leichtbauplatte angepasst sein müssen und somit eine vollautomatische Fertigung online nicht realisierbar ist. Ein weiterer Nachteil der Leichtbauplatte wird darin gesehen, dass die mit den Decklagen verklebten Rahmenriegel aufgrund der bekannten Fertigungstoleranzen insbesondere bei der Holzbearbeitung dazu führen, dass die zu verklebende Kernlage nicht vollflächig mit den Decklagen verklebt ist bzw. durch die Verpressung der Decklagen beschädigt wird. Bei der nach diesem beschriebenen Verfahren hergestellten Leichtbauplatte ohne verklebte Rahmenriegel müssen die Längsstirnseiten erst nachträglich durch zusätzliche Arbeitsgänge und Verfahrensschritte vor Beschädigung und Zerstörung geschützt werden. Bei der Verwendung der beschriebenen Rahmenriegel muss ebenfalls in einem zusätzlichen Arbeitsgang auf die Längsstirnseiten der Leichtbauplatte ein zusätzlicher Schutz kosten- und zeitintensiv durch zusätzliche Abdeckelemente aufgebracht werden. Somit sind diese Leichtbauplatten in ihrer Herstellung nicht wirtschaftlich, insbesondere unter der Tatsache der Notwendigkeit geschützter Längsstirnseiten.Another lightweight board is in the DE 103 13 055 A1 described. Here is a method and apparatus for producing a lightweight board from two the Plattenober- and the underside of the plate forming thin-walled cover layers and at least a described between the cover layers and bonded with these core layers of lightweight filler described. The method for producing this lightweight board should be characterized in that an adhesive layer is applied in the pass on a first side core layer and the first side of the core layer is combined with a first cover layer, applied to a second side of the core layer, an adhesive layer and the second side of the core layer is brought together with a second cover layer and the cover layers are pressed with the core layer. It is further described that for the production of this lightweight board arranged at least in the region of longitudinal end faces of the lightweight panel, can be arranged with the top layers glued frame latch. The lightweight board described can thus be produced on the one hand without arranged on the longitudinal end faces frame latch, as well as with this longitudinal end side arranged frame bolts. The lightweight board is thus built on the one hand with unprotected longitudinal end faces or on the other hand made with dimensioned on the cross section and the geometry of the lightweight board frame bars that cover the longitudinal end faces. A disadvantage of this method is seen that the production should indeed work in a continuous, but each lightweight panel must be installed as a single piece step by step. Thus, it is particularly disadvantageous in the use of the frame bolt that these must be adapted in their dimensions of the cover layers for the lightweight panel to be produced and thus a fully automatic production is not feasible online. Another disadvantage of the lightweight panel is seen in the fact that due to the known manufacturing tolerances especially in woodworking cause the bonded to the top layers frame that the core layer to be bonded is not fully bonded to the top layers or is damaged by the compression of the top layers. When manufactured according to this method described lightweight board without glued frame bolt longitudinal end faces must be protected only later by additional operations and process steps from damage and destruction. When using the frame bolt described must also be applied in an additional operation on the longitudinal end faces of the lightweight panel cost and time-consuming additional cover elements. Thus, these lightweight panels are not economical to manufacture, especially due to the need for protected longitudinal end faces.

Hier setzt die Erfindung ein, die es sich zur Aufgabe gestellt hat, die Nachteile des bekannten Standes der Technik zu verbessern und eine Leichtbauplatte aufzuzeigen, die kostengünstig und vollautomatisch wirtschaftlich herstellbar ist, deren Längsstirnseiten dauerhaft geschützt bzw. versiegelt sind, bei der die verwendeten Abdeckelemente der Längsstimseiten ein geringes Gewicht aufweisen, fest mit der Leichtbauplatte diese stabilisierend verbunden sind und wobei erstmalig Leichtbauplatten mit Freiformen realisierbar sind.This is where the invention, which has set itself the task of improving the disadvantages of the known prior art and to show a lightweight board that is cost-effective and fully automatic economically produced, the longitudinal end faces are permanently protected or sealed, in which the cover elements used the Längsstimseiten have a low weight, fixed to the lightweight panel they are connected stabilizing and being the first time lightweight panels with freeforms can be realized.

Zur Lösung dieser Aufgabe stellt die Erfindung die Leichtbauplatte gemäß Anspruch 18 sowie das Verfahren zur Herstellung dieser Leichtbauplatte gemäß Anspruch 1 bereit.To solve this problem, the invention provides the lightweight board according to claim 18 and the method for producing this lightweight board according to claim 1 ready.

Weitere vorteilhafte Ausgestaltungen sind In den Unteransprüchen beschrieben.Further advantageous embodiments are described in the subclaims.

Das Verfahren zur Herstellung einer erfindungsgemäßen Leichtbauplatte umfasst einen ersten Verfahrensschritt, bei dem eine Nut in wenigstens eine Längsstirnseite der Leichtbauplatte eingebracht wird, wobei in einem zweiten Verfahrensschritt eine erste Profilleiste in die Nut der Leichtbauplatte eingebracht wird, in einem dritten Schritt die über die Nut der Leichtbauplatte überstehende Profilleiste abgetragen wird und In einem vierten Verfahrensschritt eine zweite Profillelste auf die vorher abgetragene Profilleiste aufgebracht wird. Die erste Profilleiste wird aus einer mikroporösen Schaumstruktur hergestellt.The method for producing a lightweight panel according to the invention comprises a first method step, in which a groove is introduced into at least one longitudinal end face of the lightweight board, wherein in a second method step, a first profile strip is introduced into the groove of the lightweight board, in a third step via the groove of the Lightweight panel protruding profile strip is removed and in a fourth process step, a second profile rope is applied to the previously removed profile strip. The first profile strip is made of a microporous foam structure.

Es hat sich überraschend herausgestellt, dass durch den Einsatz und die Verwendung von Profilleisten aus thermoplastisch verarbeitbarem Werkstoff derartige Leichtbauplatten kostengünstig herstellbar und vor allem an den Längsstimseiten schnell und dichtend verschließbar sind. Durch die Verwendung von Profilleisten aus der Gruppe der Polyolefine, Polystyrole, Styrol-Copolymere, Polyvinylchloride, Polycarbonate, Polyester, Polyamide, Ethylenvinylacetate oder Ähnlichem kann die erfindungsgemäße Leichtbauplatte sowohl vollautomatisch wirtschaftlich bzw. kostengünstig und an jedes spezielles Anforderungsprofil ausgerichtet, hergestellt werden. Ein entscheidender Vorteil wird darin gesehen, dass es nun erstmalig möglich ist, derartige Leichtbauplatten in sog. Freiformen, wie beispielsweise mit abgerundeten Ecken, kreisförmig bzw. oval, herzustellen, die an ihren Längsstimseiten dichtend verschließbar sind.It has surprisingly been found that such lightweight panels can be produced cost-effectively and, above all, on the longitudinal side sides quickly and sealed by the use and the use of moldings made of thermoplastically processable material. Through the use of moldings from the group of polyolefins, polystyrenes, styrene copolymers, polyvinyl chlorides, polycarbonates, polyesters, polyamides, ethylene vinyl acetates or the like, the lightweight panel according to the invention can be both fully automatic economically or cost-effectively and aligned to any special profile requirements are prepared. A decisive advantage is seen in the fact that it is now possible for the first time to produce such lightweight panels in so-called. Freeforms, such as with rounded corners, circular or oval, which are sealingly closed at their Längsstimseiten.

Es hat sich als vorteilhaft herausgestellt, dass die Profilleiste, die in die Nut der Leichtbauplatte eingebracht und abgetragen wird, eine geringere Dichte als die nachträglich aufgebrachte Profilleiste aufweist. Einerseits ist durch die Verwendung eines thermoplastisch verarbeitbaren Werkstoffes mit einer geringeren Dichte das Gewicht der erfindungsgemä-βen Leichtbauplatte positiv beeinflusst, andererseits hat sich überraschend herausgestellt, dass sich durch das mechanische Abtragen, wie beispielsweise das Abfräsen des über die Nut der Leichtbauplatte überstehenden Teils der Profilleiste, im Durchlaufverfahren eine Vergrößerung der Oberfläche der Profilleiste ergibt, durch welche sich das nachträgliche Aufbringen einer weiteren Profilleiste vollautomatisch, schnell und stoffschlüssig realisieren lässt.
Es wird weiterhin vorteilhaft gesehen, dass bei einem Verhältnis der Dichten der in die Nut der Leichtbauplatte eingebrachten Profilleiste zu der auf dieser nachträglich aufgebrachten Profilleiste von 0,1 ein ausgewogenes Preis-/Leistungsverhältnis der zu verwendenden thermoplastisch verarbeitbaren Werkstoffe mit den durch sie erzielbaren mechanischen Eigenschaften ergibt. Weiterhin vorteilhaft ist, dass der Einsatz einer in die Nut der Leichtbauplatte einzusetzenden Profilleiste mit einer Dichte von 0,20 g/cm3 bis 0,85 g/cm3, vorzugsweise 0,40 bis 0,70 g/cm3, insbesondere nach der mechanischen Abtragung der über die Nut der Leichtbauplatte hervorstehenden Profilleiste eine sog. Schaumstruktur freigelegt ist, die als löchrig-porös bezeichnet werden kann, so dass die Verklebung der nachfolgend aufzubringenden Profilleiste, welche im Allgemeinen ein Dekor analog der Decklagen der Leichtbauplatte aufweist, durch das Eindringen des Klebstoffes in die löchrig-poröse Oberfläche der abgefrästen unteren Profileiste deutlich verbessert ist. Durch diese mikroporöse Struktur weist die Profilleiste an ihrer Oberfläche Öffnungen auf, die teilweise hinterschnittig ausgebildet sind. Hierdurch können Verklebequalitäten erreicht werden, die den bekannten Verklebungen von beispielsweise thermoplastisch verarbeitbaren Kantenstreifen an den Längsstirnseiten von beispielsweise Spanplatten vergleichbar sind.It has proven to be advantageous that the profile strip, which is introduced into the groove of the lightweight board and removed, has a lower density than the subsequently applied profile strip. On the one hand, the use of a thermoplastically processable material with a lower density positively influences the weight of the lightweight panel according to the invention; on the other hand, it has surprisingly been found that mechanical removal, such as, for example, milling off the part of the profile strip protruding beyond the groove of the lightweight panel , in the continuous process results in an enlargement of the surface of the profile strip, through which the subsequent application of a further profile strip can be realized fully automatically, quickly and cohesively.
It is further advantageous seen that at a ratio of the densities of the introduced in the groove of the lightweight profile strip to the subsequently applied profile strip of 0.1 a balanced price / performance ratio of the thermoplastically processable materials to be used with the achievable by them mechanical properties results. It is also advantageous that the use of an inserted into the groove of the lightweight panel profile strip having a density of 0.20 g / cm 3 to 0.85 g / cm 3, preferably 0.40 to 0.70 g / cm 3, in particular by The so-called. Foam structure is exposed, which can be referred to as perforated-porous, so that the bonding of the subsequently applied profile strip, which generally has a decor analogous to the cover layers of the lightweight board, by the mechanical removal of the projecting over the groove of the lightweight board profile strip Penetration of the adhesive into the perforated-porous surface of the milled lower profile list is significantly improved. Due to this microporous structure, the profile strip on its surface openings, which are partially undercut. As a result, bonding qualities can be achieved which are comparable to the known bonds of, for example, thermoplastically processable edge strips on the longitudinal end faces of, for example, chipboard.

Es wird weiterhin als vorteilhaft herausgestellt, dass bei der Verwendung einer in die Nut der Leichtbauplatte einzubringenden Profilleiste mit einer strukturierten Oberfläche die vorteilhafterweise eine Rauhtiefe von etwa 5 µm bis 40 µm, vorzugsweise 10 µm bis 25 µm aufweist, ebenfalls eine sehr gute adhäsive Verbindung zwischen den thermoplastisch verarbeitbaren Profilleisten realisierbar ist. Durch die unterschiedlich einstellbare strukturierte Oberfläche, welche durch verschiedene Möglichkeiten im Herstellungsverfahren für die in die Nut der Leichtbauplatte einzubringende Profilleiste realisierbar sind, wie z. B. chemische Treibmittel (bspw. Bicarbonat, Sulfonhydrazid, Azodicarbonamid), physikalische Treibmittel (bspw.Tentan, Heptan) bzw. auch physikalisches Schäumen (bspw. mit Kohlendioxid), kann das längsrandseitige Verschließen der erfindungsgemäßen Leichtbauplatte durch derartige Profilleisten allen technischen Anforderungen und Normen gerecht und vor allem wirtschaftlich erfolgen.It is further found to be advantageous that when using a profile strip to be introduced into the groove of the lightweight board with a structured surface which advantageously has a surface roughness of about 5 μm to 40 μm, preferably 10 μm to 25 μm, also a very good adhesive bond between the thermoplastically processable profile strips can be realized. Due to the differently adjustable structured surface, which can be realized by various possibilities in the manufacturing process for the profile strip to be introduced into the groove of the lightweight board, such. B. chemical blowing agents (eg bicarbonate, sulfonhydrazide, azodicarbonamide), physical Propellant (eg, tantan, heptane) or physical foaming (for example, with carbon dioxide), the longitudinal edge side closing the lightweight panel according to the invention by such moldings all technical requirements and standards can be done fairly and above all economically.

Um die Festigkeit der beispielsweise adhäsiven Verbindung zwischen den einzubringenden Profilleisten noch weiter zu erhöhen, weisen diese an ihrer der Nut zugewandten Oberfläche wenigstens teilweise ein Haftvermittlersystem auf. Dieses Haftvermittlersystem ist ausgewählt aus der Gruppe der Polyolefine, Polystyrole, Styrol-Copolymere, Polyvinylchloride, Polycarbonate, Polyester, Polyamide, Ethylenvinylacetate oder Ähnlichem, wobei das Haftvermittlersystem sowie ein eingesetztes Klebstoffsystem mit den thermoplastisch verarbeitbaren Werkstoffen der Profilleisten so abgestimmt werden können, dass eine optimale Verklebequalität und eine optimale Optik der erfindungsgemäßen Leichtbauplatte realisierbar ist. Es liegt jedoch auch im Rahmen der Erfindung, dass das Haftvermittlersystem nur bei Bedarf und entsprechend dimensioniert eingesetzt werden kann.In order to further increase the strength of, for example, adhesive connection between the profile strips to be introduced, these have at least partially on their surface facing the groove an adhesion promoter system. This primer system is selected from the group of polyolefins, polystyrenes, styrene copolymers, polyvinyl chlorides, polycarbonates, polyesters, polyamides, ethylene vinyl acetates or the like, wherein the primer system and an adhesive system used with the thermoplastically processable materials of the moldings can be adjusted so that an optimal Bonding quality and optimal appearance of the lightweight panel according to the invention can be realized. However, it is also within the scope of the invention that the primer system can be used only when needed and dimensioned accordingly.

Weiterhin hat sich überraschend herausgestellt, dass die in die Nut der Leichtbauplatte einzubringende Profilleiste aus einem recycelten thermoplastisch verarbeitbarem Werkstoff hergestellt sein kann, was die Kosten und Wirtschaftlichkeit der Leichtbauplatte weiter positiv beeinflusst.
Es liegt jedoch auch im Rahmen der Erfindung, dass die in die Nut der Leichtbauplatte einzubringende Profilleiste so dimensioniert ist, dass sie kraftschlüssig in die Nut einbringbar ist. Ein weiterer Vorteil der in die Nut der Leichtbauplatte einzubringenden Profilleiste, wenn deren Dicke etwa der Tiefe der Nut der Leichtbauplatte entspricht, wird darin gesehen, dass ein nachträgliches mechanisches Abtragen wie beispielsweise Fräsen nicht erforderlich ist, da die Dimensionierung der Profilleiste mit der Geometrie der Nut der Leichtbauplatte kommuniziert.
Durch die Verwendung eines schäumbaren beispielsweise thermoplastisch verarbeitbaren Werkstoffes und der damit realisierbaren strukturierten Oberfläche mit definierter Rauhigkeit für die untere Profilleiste kann die nächste Profilleiste, welche das Dekor aufweist, ebenfalls stoffschlüssig adhäsiv mit dieser in der Nut der Leichtbauplatte eingebrachten unteren Profilleiste verbunden werden.
Es liegt jedoch auch im Rahmen der Erfindung, dass die Oberfläche der in die Nut der Leichtbauplatte eingebrachten Profilleiste zur Optimierung einer adhäsiven Klebeverbindung durch beispielsweise eine Beflammung, eine Korona-Entladung, eine Plasmabehandlung, aber auch eine Primerbeschichtung optimierbar ist, so dass eine gezielte Aktivierung der Oberfläche der Profilleiste erfolgt.
Weiterhin vorteilhaft wird gesehen, dass die Profilleiste, welche auf die in der Nut der Leichtbauplatte eingebrachte Profilleiste aufzubringen ist, an ihrer dieser Profilleiste zugewandten Oberfläche eine entsprechende Oberflächenaktivierung aufweist, um die adhäsive Klebeverbindung zu optimieren.Furthermore, it has surprisingly been found that the profile strip to be introduced into the groove of the lightweight board can be made of a recycled thermoplastically processable material, which further positively influences the cost and economic efficiency of the lightweight board.
However, it is also within the scope of the invention that the profile strip to be introduced into the groove of the lightweight board is dimensioned such that it can be introduced into the groove in a force-fit manner. Another advantage of introducing into the groove of the lightweight panel profile strip, when the thickness of which corresponds approximately to the depth of the groove of the lightweight panel, is seen in that a subsequent mechanical removal such as milling is not required because the dimensions of the profile strip with the geometry of the groove the lightweight board communicates.
By using a foamable, for example, thermoplastically processable material and thus realizable structured surface with defined roughness for the lower profile strip, the next profile strip, which has the decor, are also adhesively bonded adhesively with this introduced in the groove of the lightweight panel lower profile strip.
However, it is also within the scope of the invention that the surface of the profile strip introduced into the groove of the lightweight board for optimizing an adhesive bond by, for example, a flame treatment, a corona discharge, a plasma treatment, but also a primer coating can be optimized, so that a targeted activation of the surface of the profile strip takes place.
Furthermore, it is advantageously considered that the profile strip, which is to be applied to the profile strip introduced in the groove of the lightweight board, has a corresponding surface activation on its surface facing this profile strip in order to optimize the adhesive bond.

Ein weiterer Vorteil der erfindungsgemäßen Leichtbauplatte wird darin gesehen, dass die aus einem thermoplastisch verarbeitbaren Werkstoff bestehenden Profilleisten im bekannten Extrusions- bzw. Coextrusionsverfahren herstellbar und wirtschaftlich auf Rollen mit ca. 100 m Länge lieferbar sind, so dass bei der Herstellung der erfindungsgemäßen Leichtbauplatte eine kontinuierliche und von geringen Maschinenstillstandszeiten geprägte Fertigung möglich ist. Durch die vorteilhafte Verwendung der aus thermoplastisch verarbeitbaren Werkstoffen bestehenden Profilleisten können die Längsstirnseiten der erfindungsgemäßen Leichtbauplatte quasi versiegelt sind, da ein doppelter Verschluss durch die beiden aufgebrachten Profilleisten erfolgt.
Die Profilleisten selbst sind aufgrund ihrer materialspezifischen Eigenschaften feuchteunempfindlich, quellen nicht und korrodieren auch nicht, so dass dies die erfindungsgemäße Leichtbauplatte bei ihrer bestimmungsgemäßen Verwendung entsprechend positiv beeinflusst und vom Stand der Technik abhebt.Another advantage of the lightweight panel according to the invention is seen in the fact that the existing of a thermoplastically processable material profile strips in the known extrusion or coextrusion and produced economically on rolls with about 100 m in length are available, so that in the manufacture of lightweight board according to the invention a continuous and characterized by low machine downtime production is possible. Due to the advantageous use of existing from thermoplastically processable moldings the longitudinal end faces of the lightweight panel according to the invention can be quasi sealed, as a double closure is carried by the two applied moldings.
The profile strips themselves are moisture insensitive due to their material-specific properties, do not swell and do not corrode, so that this affects the lightweight board according to the invention in their intended use accordingly positive and different from the prior art.

Es liegt jedoch auch im Rahmen der Erfindung, dass die Profilleisten alle Längsrandseiten der Leichtbauplatte bedecken, so dass ein umfassender Schutz realisierbar ist.However, it is also within the scope of the invention that the profile strips cover all longitudinal edge sides of the lightweight board, so that a comprehensive protection can be realized.

Die erfindungsgemäße Leichtbauplatte soll nun anhand eines die Erfindung nicht einschränkenden Ausführungsbeispiels näher beschrieben werden.The lightweight panel according to the invention will now be described with reference to an embodiment of the invention not limiting.

Es zeigen:

Figur 1 a - c
Perspektivische Darstellung einer erfindungsgemäßen Leichtbauplatte
Show it:
Figure 1 a - c
Perspective view of a lightweight panel according to the invention

In der Figur 1 a ist in einer perspektivischen Darstellung eine erfindungsgemäße Leichtbauplatte 1 dargestellt. Die Leichtbauplatte 1 weist einen viereckigen Querschnitt auf und besteht in diesem Ausführungsbeispiel aus den zwei sich gegenüberliegenden dünnwandigen Decklagen 2, 3, welche in etwa parallel zu einander angeordnet sind. Zwischen den Decklagen 2, 3 ist eine mit diesen verbundene Kernlage 4 angeordnet, welche in diesem Ausführungsbeispiel eine etwa S-förmige Struktur aufweist, wobei aber auch eine wabenartige Struktur mit einem entsprechenden hohen Hohlraumanteil möglich ist und wobei diese Kernlage 4 beispielsweise aus Papier oder ähnlichen Materialien hergestellt sein kann. In eine Stirnseite 11 der Leichtbauplatte 1 wurde eine Nut 5 eingebracht. Diese Nut 5 wird vorteilhafterweise durch eine Fräsung in die Stirnseite 11 der Leichtbauplatte 1 eingebracht. In diesem Ausführungsbeispiel ist die Nut 5 so dimensioniert, dass in den dünnwandigen Decklagen 2, 3 jeweils eine etwa L-förmige Aussparung ausgebildet ist, deren Öffnungen einander gegenüberliegen. Es liegt jedoch auch im Rahmen der Erfindung, dass die Nut 5 nicht wie in diesem Ausführungsbeispiel L-förmig bzw. rechtwinklig in den Decklagen 2, 3 ausgebildet ist, sondern auch in einem spitzen bzw. stumpfen Winkel bezogen auf die Längsseite der Decklage 2, 3. In die Nut 5 der Leichtbauplatte 1 ist eine Profilleiste 6 eingebracht, die in diesem Ausführungsbeispiel durch eine Verklebung mit der etwa L-förmigen Aussparung der Decklagen 2, 3 adhäsiv verbunden ist. Die Profilleiste 6 ist beispielsweise aus einem recycelten Styrol-Copolymeren im an sich bekannten Extrusionsverfahren hergestellt. Diesen thermoplastisch verarbeitbaren Werkstoff der Profilleiste 6 wurde das chemische Treibmittel Azodicarbonamid zugesetzt, sodass die Profilleiste 6 eine Dichte von etwa 0,6 g/cm3 aufweist. Die Dicke der Profilleiste 6 entspricht in diesem Ausführungsbeispiel etwa dem Doppelten der Tiefe der Nut 5 der Leichtbauplatte 1. Im vollautomatisierten Durchlaufverfahren wird die Leichtbauplatte 1 auf einer der Decklagen 2, 3 liegend an einer an sich bekannten Profilleistenanleimmaschine vorbeigeführt, sodass die Profilleiste 6 kontinuierlich und vollautomatisch in die Nut 5 der Leichtbauplatte 1 eingebracht wird. In einem zweiten Verfahrensschritt wird die mit der Profilleiste 6 verschlossene Längsstirnseite 11 der Leichtbauplatte 1 in einem weiteren Verfahrensschritt an einer an sich bekannten Fräsmaschine vorbeigeführt, sodass der über die Nut 5 der Leichtbauplatte 1 überstehende Teil der Profilleiste 6 bündig zur Stirnseite 11 der Leichtbauplatte 1 abgefräst wird. Damit wird eine vollflächige durch die abgefräste Profilleiste 6 verschlossene Stirnseite 11 der Leichtbauplatte 1 erzielt, die aufgrund der Schaumstruktur der Profilleiste 6 eine optimale Oberfläche für die Aufbringung einer nächsten Profilleiste 7 aufweist. Durch das mechanische Abtragen, wie beispielsweise Abfräsen des über die Nut 5 der Leichtbauplatte 1 überstehenden Teils der Profilleiste 6, entsteht eine für eine Verklebung optimierte vergrößerte strukturierte Oberfläche der Profilleiste 6, wobei die freigelegte Schaumstruktur noch zusätzlich löchrig-porös ist, sodass die Verklebung der nachfolgend aufzubringenden Profilleiste 7 durch das Eindringen des Klebstoffsystems in diese löchrig-poröse Oberfläche deutlich verbessert ist.In the FIG. 1 a is a perspective view of a lightweight panel 1 according to the invention shown. The lightweight board 1 has a quadrangular cross-section and consists in this embodiment of the two opposite thin-walled Cover layers 2, 3, which are arranged approximately parallel to each other. Between the cover layers 2, 3 a core layer 4 connected to these is arranged, which in this embodiment has an approximately S-shaped structure, but also a honeycomb structure with a corresponding high void content is possible and wherein this core layer 4, for example, of paper or the like Materials can be made. In a front side 11 of the lightweight panel 1, a groove 5 was introduced. This groove 5 is advantageously introduced by a milling in the end face 11 of the lightweight board 1. In this embodiment, the groove 5 is dimensioned so that in each case an approximately L-shaped recess is formed in the thin-walled cover layers 2, 3, the openings of which lie opposite each other. However, it is also within the scope of the invention that the groove 5 is not formed as in this embodiment L-shaped or at right angles in the cover layers 2, 3, but also at an acute or obtuse angle relative to the longitudinal side of the cover layer 2, 3. In the groove 5 of the lightweight panel 1, a profiled strip 6 is introduced, which is adhesively connected in this embodiment by an adhesive bond with the approximately L-shaped recess of the cover layers 2, 3. The profile strip 6 is made for example of a recycled styrene copolymers in a conventional extrusion process. This thermoplastic processable material of the profile strip 6, the chemical blowing agent azodicarbonamide was added so that the profile strip 6 has a density of about 0.6 g / cm 3 . In this embodiment, the thickness of the profiled strip 6 corresponds approximately to twice the depth of the groove 5 of the lightweight building board 1. In the fully automated continuous process, the lightweight building board 1 is guided on one of the cover layers 2, 3 past a profile rail bander known per se, so that the profiled strip 6 is continuous and fully automatically inserted into the groove 5 of the lightweight panel 1. In a second method step, the closed with the profile strip 6 longitudinal end side 11 of the lightweight panel 1 is passed in a further process step on a known milling machine, so that over the groove 5 of the lightweight panel 1 protruding part of the profile strip 6 flushed to the end face 11 of the lightweight panel 1 becomes. Thus, a full-surface closed by the milled profile strip 6 end face 11 of the lightweight panel 1 is achieved, which has an optimum surface for the application of a next profile strip 7 due to the foam structure of the profile strip 6. Due to the mechanical removal, such as milling of the over the groove 5 of the lightweight panel 1 protruding part of the profile strip 6, creates an optimized for bonding enlarged structured surface of the profiled strip 6, wherein the exposed foam structure is additionally porous-porous, so that the bonding of the to be applied subsequently Profile strip 7 is significantly improved by the penetration of the adhesive system into this perforated-porous surface.

In der Figur 1b ist die erfindungsgemäße Leichtbauplatte 1 dargestellt, wobei die in die Nut 5 der Leichtbauplatte 1 eingebrachte Profilleiste 6 bündig mit der Stirnseite 11 der Leichtbauplatte 1 abschließt. Auf diese Oberfläche, welche beispielsweise durch eine KoronaBehandlung noch zusätzlich aktiviert ist, wird nun die Profilleiste 7 aufgebracht, welche an ihrer von der Stirnseite 11 der Leichtbauplatte 1 wegweisenden Seite ein Dekor aufweist, welches beispielsweise analog dem Dekor der Decklagen 2, 3 der Leichtbauplatte 1 ist. Auf die durch die Oberfläche der Profilleiste 6 und der Stirnseite 11 der Leichtbauplatte 1 gebildete Oberfläche wird nun ein Klebstoffsystem, wie beispielsweise ein Heißschmelzkleber aus der Gruppe der Polyurethane aufgetragen und in einem nächsten Verfahrensschritt wird die Profilleiste 7 aufgebracht. Die Profilleiste 7 ist im Allgemeinen etwas breiter dimensioniert als die Stirnseite 11 der Leichtbauplatte 1, sodass fertigungsbedingte Toleranzen in der Herstellung der Leichtbauplatte 1 ausgleichbar sind. Durch das Aufbringen der Profilleiste 7 erfolgt ein sogenannter "doppelter" Verschluss der Leichtbauplatte 1, mit der die Kernlage 4 vor möglichen äußeren Einflüssen geschützt ist.
Die damit erreichbare Haftkraft der Klebeverbindung zwischen der Profilleiste 6 und der Profilleiste 7 ist größer, als die Reißfestigkeit des thermoplastisch verarbeitbaren Werkstoffes der Profilleiste 6, 7.In the FIG. 1b the lightweight panel 1 according to the invention is shown, wherein the inserted into the groove 5 of the lightweight panel 1 profile strip 6 is flush with the end face 11 of the lightweight panel 1. On this surface, which is additionally activated, for example, by a KoronaBehandlung, now the profile strip 7 is applied, which has a decor on its side facing away from the front side 11 of the lightweight panel 1 a decor which, for example, analogous to the decor of the cover layers 2, 3 of the lightweight panel. 1 is. On the surface formed by the surface of the profile strip 6 and the front side 11 of the lightweight panel 1 is now an adhesive system, such as a hot melt adhesive from the group of polyurethanes applied and in a next step, the profile strip 7 is applied. The profile strip 7 is generally dimensioned somewhat wider than the end face 11 of the lightweight board 1, so that production-related tolerances in the production of the lightweight board 1 can be compensated. By applying the profile strip 7 is a so-called "double" closure of the lightweight board 1, with which the core layer 4 is protected from possible external influences.
The thus achievable adhesive force of the adhesive bond between the profile strip 6 and the profile strip 7 is greater than the tensile strength of the thermoplastically processable material of the profile strip 6, the 7th

In der Figur 1c ist die erfindungsgemäße Leichtbauplatte 1 dargestellt, bei der die über die Längsstirnseite 11 der Leichtbauplatte 1 überstehenden Ränder der Profilleiste 7 bündig zu den Decklagen 2, 3 abgetragen sind und der etwa prismatische Querschnitt der Profilleiste 7 an ihren oberen Kanten mit einem zusätzlichen optisch anspruchsvollen Radius versehen ist. Ein weiterer Vorteil der Verwendung von thermoplastisch verarbeitbaren Profilleisten 6, 7 wird darin gesehen, dass es bisher nach dem bekannten Stand der Technik nur möglich ist, eckige Leichtbauplatten 1 herzustellen, da die verwendeten Rahmenriegel für benötigte Freiformen, wie beispielsweise Radien, kreisförmige Leichtbauplatten 1 etc., nicht verwendbar sind. Es liegt jedoch auch im Rahmen der Erfindung, dass weitere Stirnseiten 11' der Leichtbauplatte je nach Anforderungsprofil mit derartigen Profilleisten 6, 7 dichtend verschließbar sind.In the Figure 1c the lightweight panel 1 according to the invention is shown, in which over the longitudinal end face 11 of the lightweight panel 1 protruding edges of the profile strip 7 are flush with the cover layers 2, 3 and the approximately prismatic cross-section of the profile strip 7 provided at their upper edges with an additional optically demanding radius is. Another advantage of the use of thermoplastically processable profiled strips 6, 7 is seen in the fact that it is only possible in the prior art to produce angular lightweight panels 1, since the frame bars used for required free forms, such as radii, circular lightweight panels 1 etc ., are not usable. However, it is also within the scope of the invention that further end faces 11 'of the lightweight board depending on the requirement profile with such profiled strips 6, 7 are sealingly closed.

Claims (34)

  1. Process for producing a lightweight panel (1) with two thin-walled outer layers (2,3) and at least one core layer (4) arranged between the outer layers (2, 3) and bonded to these, encompassing the following steps:
    a) introducing a groove (5) into at least one longitudinal edge (11) of the lightweight panel (1),
    (b) introducing a first profile strip (6) into the groove (5) of the lightweight panel (1),
    c) ablating that portion of the first profile strip (6) that projects beyond the groove (5) of the lightweight panel (1), characterized
    d) in that a second profile strip (7) is applied to the first profile strip (6) and
    e) in that the first profile strip (6) is produced with a microporous foam structure.
  2. Process according to Claim 1, characterized in that the profile strip (6, 7) is produced from a thermoplastically processable material.
  3. Process according to Claim 1 or 2, characterized in that the profile strip (6, 7) is selected from the group of the polyolefins, polystyrenes, styrene copolymers, polyvinyl chlorides, polycarbonates, polyesters, polyamides, ethylene-vinyl acetates or the like.
  4. Process according to any of Claims 1 to 3, characterized in that the density of the first profile strip (6) is lower than that of the second profile strip (7).
  5. Process according to Claim 4, characterized in that the ratio of the density of the first profile strip (6) to the density of the second profile strip (7) is at least 0.1.
  6. Process according to Claim 4 or 5, characterized in that the density of the first profile strip (6) is from about 0.2 g/cm3 to about 0.85 g/cm3, preferably from 0.40 g/cm3 to 0.70 g/cm3.
  7. Process according to any of Claims 1 to 6, characterized in that the first profile strip (6) is produced with at least one to some extent structured surface.
  8. Process according to Claim 7, characterized in that the surface of the first profile strip (6) is produced with a roughness depth from about 5 µm to 40 µm, preferably from 10 µm to 25 µm.
  9. Process according to any of Claims 1 to 8, characterized in that the first profile strip (6) is produced with a thickness which is greater than the depth of the groove (5) of the lightweight panel (1).
  10. Process according to any of Claims 1 to 9, characterized in that that side of the profile strip (6, 7) that faces towards the groove (5) of the lightweight panel (1) has at least to some extent an adhesion-promoter system.
  11. Process according to any of Claims 1 to 10, characterized in that the adhesion-promoter system is selected from the group of the PVC copolymers and polyurethanes.
  12. Process according to any of Claims 1 to 11, characterized in that that side of the profile strip (6, 7) that faces towards the groove (5) of the lightweight panel (1) has surface activation to at least some extent.
  13. Process according to any of Claims 1 to 12, characterized in that the first profile strip (6) is arranged with coherent bonding in the groove (5) of the lightweight panel (1).
  14. Process according to Claim 13, characterized in that, for the coherent bonding, an adhesive system is used from the group of the polyamides, of the ethylene-vinyl acetates, of the polyolefins, of the polyurethanes and the like.
  15. Process according to any of Claims 1 to 14, characterized in that the first profile strip (6) is arranged with interlock bonding in the groove (5) of the lightweight panel (1).
  16. Process according to any of Claims 1 to 15, characterized in that the second profile strip (7) is arranged with coherent bonding on the first profile strip (6).
  17. Process according to Claim 16, characterized in that the adhesion of the adhesive bond between the first profile strip (6) and the second profile strip (7) is greater than the ultimate tensile strength of the thermoplastically processable material of the profile strip (6, 7).
  18. Lightweight panel (1) with two thin-walled outer layers (2, 3) and at least one core layer (4) arranged between the outer layers (2, 3) and bonded to these, where a groove (5) has been introduced into at least one longitudinal edge (11) of the lightweight panel (1), where a first profile strip (6) has been introduced into the groove (5) and the profile strip (6) that projects beyond the groove (5) of the lightweight panel (1) has been ablated, characterized in that a second profile strip (7) has been applied to the first profile strip (6) and in that the first profile strip (6) has a microporous foam structure.
  19. Lightweight panel according to Claim 18, characterized in that the profile strip (6, 7) is composed of a thermoplastically processable material.
  20. Lightweight panel according to Claim 18 or 19, characterized in that the profile strip (6, 7) has been selected from the group comprising polyolefins, polystyrenes, styrene copolymers, polyvinyl chlorides, polycarbonates, polyesters, polyamides, ethylene-vinyl acetates or the like.
  21. Lightweight panel according to any of Claims 18 to 20, characterized in that the density of the first profile strip (6) is lower than that of the second profile strip (7).
  22. Lightweight panel according to any of Claims 18 to 21, characterized in that the ratio of the density of the first profile strip (6) to the density of the second profile strip (7) is at least 0.1.
  23. Lightweight panel according to any of Claims 18 to 22, characterized in that the density of the first profile strip (6) is from about 0.2 g/cm3 to about 0.85 g/cm3, preferably from 0.40 g/cm3 to 0.70 g/cm3.
  24. Lightweight panel according to any of Claims 18 to 23, characterized in that the first profile strip (6) has at least to some extent a structured surface.
  25. Lightweight panel according to any of Claims 18 to 24, characterized in that the surface of the first profile strip (6) has a roughness depth from about 5 µm to 40 µm, preferably from 10 µm to 25 µm.
  26. Lightweight panel according to any of Claims 18 to 25, characterized in that the thickness of the first profile strip (6) is greater than the depth of the groove (5) of the lightweight panel (1).
  27. Lightweight panel according to any of Claims 18 to 26, characterized in that that side of the profile strip (6, 7) that faces towards the groove (5) of the lightweight panel (1) has at least to some extent an adhesion-promoter system.
  28. Lightweight panel according to Claim 27,
    characterized in that the adhesion-promoter system is selected from the group of the PVC copolymers and polyurethanes.
  29. Lightweight panel according to any of Claims 18 to 28, characterized in that that side of the profile strip (6, 7) that faces towards the groove (5) of the lightweight panel (1) has surface activation to at least some extent.
  30. Lightweight panel according to any of Claims 18 to 29, characterized in that the first profile strip (6) has been arranged with coherent bonding in the groove (5) of the lightweight panel (1).
  31. Lightweight panel according to any of Claims 18 to 30, characterized in that, for the coherent bonding, an adhesive system has been selected from the group of the polyamides, of the ethylene-vinyl acetates, of the polyolefins, of the polyurethanes and the like.
  32. Lightweight panel according to any of Claims 18 to 31, characterized in that the first profile strip (6) has been arranged with interlock bonding in the groove (5) of the lightweight panel (1).
  33. Lightweight panel according to any of Claims 18 to 32, characterized in that the second profile strip (7) has been arranged with coherent bonding on the first profile strip (6).
  34. Lightweight panel according to any of Claims 18 to 33, characterized in that the adhesion of the adhesive bond between the first profile strip (6) and the second profile strip (7) is greater than the ultimate tensile strength of the thermoplastically processable material of the profile strip (6, 7).
EP05012695A 2005-03-04 2005-06-14 Lightweight building panel and method of production Not-in-force EP1698738B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05012695T PL1698738T3 (en) 2005-03-04 2005-06-14 Lightweight building panel and method of production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005010565.3A DE102005010565C5 (en) 2005-03-04 2005-03-04 Lightweight panel and method for its production

Publications (3)

Publication Number Publication Date
EP1698738A2 EP1698738A2 (en) 2006-09-06
EP1698738A3 EP1698738A3 (en) 2007-11-14
EP1698738B1 true EP1698738B1 (en) 2010-04-28

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EP05012695A Not-in-force EP1698738B1 (en) 2005-03-04 2005-06-14 Lightweight building panel and method of production

Country Status (11)

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US (1) US7892631B2 (en)
EP (1) EP1698738B1 (en)
CN (1) CN100584603C (en)
AT (1) ATE466148T1 (en)
AU (2) AU2006200897A1 (en)
CA (1) CA2538539C (en)
DE (2) DE102005010565C5 (en)
DK (1) DK1698738T3 (en)
ES (1) ES2344297T3 (en)
PL (1) PL1698738T3 (en)
PT (1) PT1698738E (en)

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Also Published As

Publication number Publication date
CN1864993A (en) 2006-11-22
CA2538539C (en) 2013-06-04
EP1698738A3 (en) 2007-11-14
DE102005010565B4 (en) 2010-02-18
US7892631B2 (en) 2011-02-22
AU2006200962B2 (en) 2012-02-16
DE102005010565C5 (en) 2015-03-12
AU2006200897A1 (en) 2006-09-28
DE502005009482D1 (en) 2010-06-10
DK1698738T3 (en) 2010-08-23
ATE466148T1 (en) 2010-05-15
CA2538539A1 (en) 2006-09-04
AU2006200962A1 (en) 2006-09-21
DE102005010565A1 (en) 2006-09-14
PL1698738T3 (en) 2010-09-30
CN100584603C (en) 2010-01-27
ES2344297T3 (en) 2010-08-24
EP1698738A2 (en) 2006-09-06
PT1698738E (en) 2010-07-08
US20060210777A1 (en) 2006-09-21

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