DE102004057854A1 - Semi-finished product for use in cabinetry, has bar-shaped or lamellar units with rectangular cross section such that two semi-finished halves are joined by adhesive material provided on side surface of units - Google Patents

Semi-finished product for use in cabinetry, has bar-shaped or lamellar units with rectangular cross section such that two semi-finished halves are joined by adhesive material provided on side surface of units Download PDF

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Publication number
DE102004057854A1
DE102004057854A1 DE102004057854A DE102004057854A DE102004057854A1 DE 102004057854 A1 DE102004057854 A1 DE 102004057854A1 DE 102004057854 A DE102004057854 A DE 102004057854A DE 102004057854 A DE102004057854 A DE 102004057854A DE 102004057854 A1 DE102004057854 A1 DE 102004057854A1
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Prior art keywords
semi
formable
halves
shaped
units
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DE102004057854A
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German (de)
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Torsten Schumann
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Technische Universitaet Dresden
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Technische Universitaet Dresden
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/22—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side of spaced pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
    • A47B96/20—Furniture panels or like furniture elements
    • A47B96/202—Furniture panels or like furniture elements with a continuous layer allowing folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/20—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side of hollow pieces, e.g. tubes; of pieces with channels or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/296—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and non-metallic or unspecified sheet-material
    • 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
    • E04C2/32—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 formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/328—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 formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material slightly bowed or folded panels not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
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    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2479/00—Furniture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The product has two semi-finished halves (1, 2), each including thin walled, deformable top and bottom layers. Bar-shaped or lamellar units (5) made of polyurethane foamed material are arranged parallely in the layers, where the bar-shaped or lamellar units are spaced apart from each other. The units have rectangular cross section such that the two halves are joined by an adhesive material provided on the side surfaces of the units.

Description

Die Erfindung betrifft ein umformbares Sandwich-Halbzeug, das insbesondere im Möbelbau sowie im Innenausbau von Fahrzeugen als flächiges, einfach gekrümmtes Bauteil (2D-Formteil) verwendet werden kann.The The invention relates to a deformable sandwich semifinished product, in particular in furniture construction and in the interior of vehicles as a flat, simply curved component (2D molding) can be used.

Sandwichelemente sind zu einem Schichtverbund stoffschlüssig zusammengefasste mehrlagige Anordnungen flächiger Elemente, wobei es zusammenhängende Grenzflächen ohne Vermengung der einzelnen Komponenten (Lagen) untereinander gibt. In der Regel sind sie aus zwei dünnen und festen zugkraftübertragenden Deckschichten und einem dazwischenliegenden dicken schubkraftübertragenden druckfesten Kern geringer Dichte zum Gewähren des Abstandes und einer Schubkraftübertragung von Deckschicht zu Deckschicht aufgebaut, wobei alle Schichten fest (zumeist stoffschlüssig über Klebstoff) miteinander verbunden sind. Derartige Sandwich-Bauelemente eignen sich aufgrund ihrer Struktur nicht für eine nachfolgende, zweidimensionale Umformung in einer Ebene.sandwich elements are multi-ply composite layers in a composite layer Arrangements areal Elements, being contiguous interfaces without mixing the individual components (layers) with each other. As a rule, they are made of two thin ones and fixed traction Cover layers and an intermediate thick shear force transmitting pressure-resistant core of low density for granting the distance and a Thrust transfer constructed from topcoat to topcoat, with all layers solid (mostly cohesively via adhesive) with each other are connected. Such sandwich components are suitable due their structure is not for a subsequent, two-dimensional transformation in a plane.

Aus der DE 4130620 C2 ist ein Verfahren zum Umformen von Sandwichelementen, insbesondere zum Biegeumformen eines ebenflächigen Gegenstandes mit Wabenstruktur bekannt. Das Formteil entsteht durch Aushärten einer, in einer Form fixierten Wabenstruktur. Dabei werden die an der äußeren Seite auftretenden Zugspannungen vermindert. Verfahren und Vorrichtung setzen eine längere Verweilzeit des Halbzeuges beim Umformen in der Biegevorrichtung voraus und verursachen daher höhere Fertigungskosten.From the DE 4130620 C2 For example, there is known a method of forming sandwich elements, in particular bending forming a planar honeycomb article. The molded part is formed by curing a honeycomb structure fixed in a mold. In this case, the tensile stresses occurring on the outer side are reduced. Method and apparatus require a longer residence time of the semifinished product during forming in the bending device and therefore cause higher production costs.

Aus der DE 38 31 363 A1 ist ein Verfahren zum Biegen von Sandwichplatten bekannt, bei dem am Halbzeug eine oder mehrere Biegerinnen durch Einprägungen in der inneren Deckschicht ausgebildet werden. Dabei wird der festigkeitsbestimmende Kern zerstört.From the DE 38 31 363 A1 For example, a method for bending sandwich panels is known in which one or more benders are formed on the semifinished product by embossings in the inner cover layer. This destroys the strength-determining core.

Aufgabe der Erfindung ist es, ein umformbares Sandwich-Halbzeug vorzuschlagen, das die Nachteile des bekannten Standes der Technik eliminiert, das aufgrund seiner geringen Masse vorteilhaft im Fahrzeugbau, aber auch im Möbelbau und im Innenausbau eingesetzt werden kann. Dabei soll das Sandwich-Halbzeug mit einfachen Mitteln auch im kalten Zustand in einer Ebene biegeverformbar und bei kleinen Losgrößen wirtschaftlich einsetzbar sein.task The invention is to propose a deformable sandwich semifinished product, which eliminates the disadvantages of the known art, because of its low mass advantageous in vehicle construction, but also in furniture construction and can be used in interior design. This is the sandwich semifinished product with simple means even in the cold state in one plane bendable and economical for small batch sizes be usable.

Erfindungsgemäß wird die Aufgabe gelöst durch ein umformbares Sandwich-Halbzeug, bestehend aus zwei Halbzeughälften mit je einer dünnwandigen, elastisch verformbaren Grund- oder Deckschicht, auf der eine Anzahl stab- oder streifenförmiger Elemente im wesentlichen parallel und zueinander beabstandet angeordnet sind.According to the invention Task solved by a deformable sandwich semifinished product, consisting of two half-halfs each with a thin-walled, elastically deformable base or cover layer on which a number rod-shaped or strip-shaped Elements arranged substantially parallel and spaced from each other are.

Geometrie, Lage und Größe der beabstandeten stabförmigen Elemente sind so gestaltet, dass die beiden Halbzeughälften des umformbaren Sandwich-Halbzeuges in axialer Richtung (y-Richtung) ineinander geschoben werden können oder in z-Richtung ineinander einschiebbar sind (1). Dabei greifen die stabförmigen Elemente oder Stege der oberen Halbzeughälfte formschlüssig in die zugehörigen Ausnehmungen der unteren Halbzeughälfte ein.Geometry, position and size of the spaced rod-shaped elements are designed so that the two half-halves of the deformable sandwich semifinished product in the axial direction (y-direction) can be pushed into one another or in the z-direction are inserted into each other ( 1 ). In this case, the rod-shaped elements or webs of the upper half of the formally engage in the associated recesses of the lower half of the half.

Die beiden Halbzeughälften sind vorteilhaft als formideale Gegenstücke ausgebildet. Die stabförmigen Elemente weisen bevorzugt eine offene Struktur auf, die das Eindringen von Klebstoff ermöglicht.The two half-halfs are advantageously designed as formideal counterparts. The rod-shaped elements preferably have an open structure which prevents the penetration of Adhesive allows.

Grund- und Deckschicht bestehen aus einem dünnwandigen, elastisch verformbaren Werkstoff, wie einem Holzfurnier, einer Papierlage, einem Laminat aus Papier oder einem faserverstärkten Kunststoff. Ebenso sind Kombinationen mehrerer der vorgenannten Lagen zu einer Grund- oder Deckschicht möglich.Reason- and top layer consist of a thin-walled, elastically deformable Material, such as a wood veneer, a paper layer, a laminate made of paper or a fiber-reinforced plastic. Likewise, combinations of several of the aforementioned layers are one Base or cover possible.

Die stab- oder stegförmigen Elemente sind mit der Grund- bzw. Deckschicht mechanisch oder thermisch verbunden. Vorzugsweise erfolgt die Verbindung durch geeignete Klebstoffe.The rod-shaped or bar-shaped Elements are mechanical or thermal with the base or top layer connected. Preferably, the compound is made by suitable adhesives.

Die stabförmigen Elemente sind so ausgebildet, dass beide Halbzeughälften vorteilhaft in axialer Richtung (y-Achse) ineinander geschoben werden können oder in z-Richtung ineinander einschiebbar sind. Dabei greifen die profilierten Elemente oder Stege der oberen Halbzeughälfte formschlüssig in die zugehörigen Ausnehmungen der unteren Halbzeughälfte ein. Vor dem losen Zusammenfügen beider Halbzeughälften des umformbaren Sandwich-Formteiles werden zumindest die Seitenflächen der steg- oder streifenförmigen Elemente mit einem aktivierbaren Klebemittel benetzt. In Abhängigkeit von der gewünschten Festigkeit können zusätzlich auch die Zwischenräume zwischen den benachbarten stabförmigen Elementen bzw. die Stirnseite dieser Elemente mit Klebemittel benetzt werden.The rod-shaped Elements are designed so that both half-halves advantageous in the axial direction (y-axis) can be pushed together or can be inserted into each other in the z-direction. The profiled grasp this Elements or webs of the upper half of the form-fitting manner in the associated Recesses of the lower half of a half. Before the loose assembly of both Semi-finished halves the deformable sandwich molding are at least the side surfaces of the web-shaped or strip-shaped Moisten elements with an activatable adhesive. In dependence of the desired Strength can in addition also the gaps between the adjacent rod-shaped Elements or the front side of these elements wetted with adhesive become.

Das neuartige, umformbare Sandwich-Halbzeug wird nachfolgend mit bekannten Umformverfahren plastisch verformt. So kann die Formgebung in einem mehrteiligen Pressengesenk erfolgen. Nachdem das Halbzeug in den Gesenkhälften den gewünschten Umformgrad erreicht hat, werden die Klebstoffpartikel durch Zufuhr von Energie (Wärmestrahlung, hochfrequente Energiefelder, etc.) aktiviert. In Abhängigkeit vom verwendeten Klebstoff verbleibt das umformbare Sandwich-Halbzeug temporär im Gesenk. Nachfolgend wird das Teil entnommen und entsprechend dem jeweiligen Verwendungszweck weiterbearbeitet.The novel, deformable sandwich semifinished product is subsequently plastically deformed using known forming processes. Thus, the shaping can be done in a multi-part press die. After the semi-finished product has reached the desired degree of deformation in the die halves, the adhesive particles are activated by supplying energy (heat radiation, high-frequency energy fields, etc.) fourth. Depending on the adhesive used, the deformable sandwich semifinished product temporarily remains in the die. Subsequently, the part is removed and further processed according to the respective purpose.

Überraschend wurde festgestellt, dass bereits beim Fügen der beiden Halbzeughälften des umformbaren Sandwich-Halbzeuges durch das kammartige Ineinandergreifen der vorzugsweise profilierten, stegförmigen Elemente ein fester Verbund geschaffen wird, der in der Lage ist, Normalkräfte aufzunehmen. Bei der nachfolgenden plastischen Umformung kommt es zu einem intensiven Verkrallen bzw. Verklammern der einander berührenden Seitenflächen benachbarter Stege. Bereits dadurch wird zu einem erheblichen Maß die ungewollte elastische Rückfederung des umformbaren Sandwich-Halbzeuges minimiert. Neben den wirkenden Adhäsionskräften kommt es beim Aushärten des Klebers durch die Kohäsions- und Adhäsionskräfte zu einem dauerhaften Verbund des umgeformten Sandwich-Halbzeuges.Surprised it was found that already when joining the two half-halves of the formable Sandwich semi-finished by the comb-like interlocking preferably profiled, web-shaped Elements is created a solid composite that is able to normal forces take. The following plastic deformation occurs to an intense clawing or clasping of the touching one another faces neighboring bridges. Already this is the unwanted to a considerable extent elastic springback minimized the deformable sandwich semi-finished product. In addition to the acting Adhesive forces comes it when curing adhesive through the cohesion and adhesion forces to one permanent bond of the formed sandwich semifinished product.

Durch den formschlüssigen Verbund der beiden Halbzeughälften des Sandwich-Halbzeuges und die zusätzliche stoffschlüssige Verbindung beider Hälften nach dem Aushärten des Klebers entsteht ein Leichtbau-Formteil, das gegenüber anderen, zwei- oder dreidimensional verformbaren Halbzeugen eine geringe Dichte aufweist. Ein weiterer Vorteil besteht im möglichen Einsatz nachwachsender Rohstoffe für die Herstellung der Grund- und Deckschicht sowie der steg- oder streifenförmigen Elemente, die den Kern des Leichtbau-Halbzeugs bilden. So können Grund- und Deckschicht aus Holzfurnier oder aus Papierlagen gefertigt werden.By the form-fitting Composite of the two half-halves of sandwich semifinished product and the extra cohesive Connection of both halves after curing the adhesive creates a lightweight molded part that, compared to others, two- or three-dimensional deformable semi-finished a small Has density. Another advantage is possible Use of renewable raw materials for the production of basic and cover layer and the web or strip-shaped elements that form the core form the lightweight semi-finished product. So can ground and top layer made of wood veneer or paper layers.

Die steg- oder streifenförmigen Elemente des umformbaren Kerns bestehen vorteilhaft aus einem Wabenprofil mit gerichteter Struktur. Der Biegevorgang erfolgt dabei um die x-Achse (1) bzw. raumparallele Achsen senkrecht zur Längsrichtung der steg- oder streifenförmigen Elemente in Plattenebene.The web or strip-shaped elements of the deformable core advantageously consist of a honeycomb profile with a directed structure. The bending process takes place around the x-axis ( 1 ) or space-parallel axes perpendicular to the longitudinal direction of the web or strip-shaped elements in the plane of the plate.

Bei der Biegeumformung des Sandwich-Halbzeuges in die vorgesehene Richtung verschieben sich die jeweils benachbarten stegförmigen Elemente sowie die Deck- und Grundschicht gegenläufig und parallel zueinander. Dadurch wird eine elastische Biegeverformung des Halbzeuges ohne plastische Verformung der Grund- und Deckschichten ermöglicht. Die Richtungen der möglichen Biegeumformung sind dabei durch die Ausrichtung der streifen- oder lamellenartigen Elemente fixiert.at the bending deformation of the sandwich semi-finished product in the intended direction the adjacent bar-shaped elements as well as the cover and base layer shift opposite and parallel to each other. This will cause an elastic bending deformation of the semi-finished product without plastic deformation of the base and outer layers allows. The directions of the possible Biegeumformung are thereby by the orientation of the strip or fixed to lamellar elements.

Als weiterhin vorteilhaft hat sich herausgestellt, dass es durch das Verhaken bzw. Verkrallen der Seitenflächen benachbarter stegförmiger Elemente vor dem Einleiten des plastischen Umformprozesses zu einer gleichmäßigen Spannungsverteilung im Halbzeug kommt (quasi spannungsfreies Bauteil).When Furthermore, it has been found advantageous that it is due to the Hooking or clawing the side surfaces of adjacent web-shaped elements before initiating the plastic forming process to a uniform stress distribution in the Semifinished product comes (virtually tension-free component).

Das umformbare Sandwich-Halbzeug kann in Abhängigkeit von der späteren Verwendung mit unterschiedlichen Grund- und Deckschichten ausgebildet sein. So ist es aus Kostengründen hinreichend, wenn z. B. im Innenausbau von Schienenfahrzeugen nur die dem Betrachter zugewandte, dekorative Schicht aus höherwertigem Material, wie z. B. einem ein- oder mehrlagigen Holzfurnier besteht. Demgegenüber kann die abgewandte Grund- oder Deckschicht je nach Belastungssituation aus einem hochverdichteten Papierlaminat oder einem faserverstärkten Kunststoff gebildet sein, die die Druck- und Zugspannungen sicher aufnehmen.The Formable sandwich semi-finished products may be subject to later use be formed with different ground and cover layers. So it is for cost reasons sufficiently, if z. B. in the interior of rail vehicles only the viewer facing, decorative layer of higher quality Material, such. B. consists of a single or multi-layered wood veneer. In contrast, can the remote base or top layer depending on the load situation from a high-density paper laminate or a fiber-reinforced plastic be formed, which absorb the compressive and tensile stresses safely.

Das erfindungsgemäße Halbzeug ermöglicht vorteilhaft eine plastische Verformung im kalten Zustand. Dadurch kann auf den Einsatz kostenintensiver beheizbarer Membranpressen oder von Öfen verzichtet werden.The Inventive semi-finished product allows advantageous a plastic deformation in the cold state. This can be done on the Use of expensive heated membrane presses or ovens omitted become.

In Abhängigkeit vom späteren Verwendungszweck können auch die Eigenschaften des umgeformten Halbzeuges durch gezielte Auswahl der Werkstoffe für die Grund- und Deckschicht sowie die Kernschicht bestimmt werden.In dependence from later Purpose of use also the properties of the formed semi-finished product through targeted Selection of materials for the ground and top layer and the core layer can be determined.

Durch die Verwendung des innovativen, umformbaren Sandwich-Halbzeuges kommt es im Bereich üblicher Biegeradien nicht zu der sonst beobachteten Rissneigung in der zugbeanspruchten Zone oder zu einer Faltenbildung im Druckbereich. Ebenso wird das Abreißen der Stege von der Grund- bzw. Deckschicht wirksam verhindert.By the use of the innovative, formable sandwich semi-finished product it comes in the usual range Bend radii not to the otherwise observed crack tendency in the zugbeanspruchten Zone or wrinkling in the pressure area. Likewise, that will Tear off the webs of the base or top layer effectively prevented.

Als besonders vorteilhaft hat sich herausgestellt, wenn sich die gegenüberliegenden Stege der beiden Komponenten des umformbaren Sandwich-Halbzeuges beim elastischen Fügen soweit durchdringen, dass die Stirnflächen der Stege die Oberfläche der gegenüber liegenden Grund- bzw. Deckschicht berühren.When Particularly advantageous has been found when the opposite Webs of the two components of the deformable sandwich semifinished product during elastic joining so far penetrate that the faces of the webs the surface of across from touch the underlying base or cover layer.

Als ebenso vorteilhaft hat sich erwiesen, wenn nach dem elastischen Fügen zwischen der Stirnfläche des Steges und der gegenüber liegenden Oberfläche der Grund- oder Deckschicht ein Abstand von etwa 0,5 mm bis 2,0 mm verbleibt. Dadurch können überschüssiger Klebstoff oder vorhandene Luftblasen in den vorhandenen Zwischenraum eindringen bzw. durch den gebildeten Kanal abgeleitet werden.When just as advantageous has proved, if after the elastic Joining in between the face the bridge and the opposite lying surface the base or topcoat a distance of about 0.5 mm to 2.0 remains mm. This can cause excess glue or existing air bubbles penetrate into the existing gap or be derived by the channel formed.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher beschrieben und in zugehörigen Zeichnungen illustriert.The invention will be described in more detail with reference to an embodiment and in Illustrated drawings.

Es zeigen:It demonstrate:

1: Ein umformbares Sandwich-Halbzeug, bestehend aus zwei Halbzeughälften vor dem elastischen Zusammenfügen (Abbildung a) sowie nach der plastischen Umformung (Abbildung b) 1 : A deformable sandwich semi-finished product consisting of two half-halves before elastic joining (Figure a) and after plastic deformation (Figure b)

2: Eine alternative Struktur der beiden Halbzeughälften in einer stark schematisierten, geschnittenen Seitenansicht 2 : An alternative structure of the two half-halves in a highly schematic, cut side view

3: Eine weitere alternative Gestaltung der Halbzeughälften 3 : Another alternative design of the half-halfs

4: Ein Wabenprofil mit gerichteter Struktur (Welle-Steg-Wabe). 4 : A honeycomb profile with directional structure (wave-bridge-honeycomb).

1, Abbildung a zeigt in einer vereinfachten Darstellung ein Sandwich-Halbzeug, das durch Fügen aus zwei Halbzeughälften 1, 2 hergestellt wird. 1 , Figure A shows a simplified representation of a sandwich semi-finished by joining from two half-halves 1 . 2 will be produced.

Die Grundschicht 2 besteht aus einem faserverstärkten Kunststoff. Die Deckschicht 1 besteht aus einem dünnen Holzfurnier. Die beabstandeten stabförmigen Elemente 5 bestehen aus Polyurethan-Schaumstoff und sind mittels Klebstoff mit der Grund- bzw. Deckschicht 3, 4 verbunden.The base layer 2 consists of a fiber-reinforced plastic. The cover layer 1 consists of a thin wood veneer. The spaced rod-shaped elements 5 are made of polyurethane foam and are by means of adhesive with the base or cover layer 3 . 4 connected.

Der rechteckige Querschnitt der parallel angeordneten, stabförmigen Elemente 5 erlaubt ein einfaches Fügen der beiden Halbzeughälften 1, 2 durch Schub in z-Richtung.The rectangular cross section of the parallel, rod-shaped elements 5 allows easy joining of the two half-halves 1 . 2 by thrust in z-direction.

Vor dem Fügen der Halbzeughälften wird die Oberfläche der Fügepartner mit einem aktivierbaren Klebstoff benetzt. Beim Fügen der Halbzeughälften wird durch das kammartige Ineinandergreifen der stegförmigen Elemente 5 ein fester Verbund geschaffen wird, der in der Lage ist, Normalkräfte aufzunehmen.Before joining the half-halves, the surface of the joining partners is wetted with an activatable adhesive. When joining the half-halfs is by the comb-like meshing of the web-shaped elements 5 a solid composite is created, which is able to absorb normal forces.

Bei der nachfolgenden plastischen Umformung bei Raumtemperatur im Bieggesenk kommt es zu einem intensiven Verkrallen bzw. Verklammern der einander berührenden Seitenflächen 6 benachbarter Elemente 5.In the subsequent plastic deformation at room temperature in the bending die, there is an intensive clawing or clamping of the mutually contacting side surfaces 6 neighboring elements 5 ,

Zur Fixierung wird der Klebstoff durch Wärmezufuhr aktiviert. In Abhängigkeit vom verwendeten Kleber kann die Verweilzeit des Halbzeugs bis auf wenige Sekunden reduziert werden.to Fixing the adhesive is activated by heat. Dependent on From the adhesive used, the residence time of the semi-finished product can be up to a few Be reduced in seconds.

Abbildung b zeigt das einfach gekrümmte Halbzeug nach der plastischen Biegeverformung um die x-Achse.Illustration b shows the simply curved semi-finished product after the plastic bending deformation around the x-axis.

2 zeigt eine alternative Struktur der beiden Halbzeughälften 1, 2 in einer stark schematisierten, geschnittenen Seitenansicht. Der trapezförmige Querschnitt der parallel angeordneten, stabförmigen Elemente 5 erlaubt ebenfalls ein einfaches Fügen der beiden Halbzeughälften 1, 2 durch Schub in z-Richtung. Durch die vergrößerten Seitenflächen der Fläche der stabförmigen Elemente 5 kommt es bereits beim Fügen der beiden Halbzeughälften 1, 2 zu einer innigen Verklammerung der einander berührenden Elemente 5. 2 shows an alternative structure of the two half-halves 1 . 2 in a highly schematic, sectioned side view. The trapezoidal cross section of the parallel, rod-shaped elements 5 also allows easy joining of the two half-halves 1 . 2 by thrust in z-direction. Due to the enlarged side surfaces of the surface of the rod-shaped elements 5 it already comes when joining the two half-halves 1 . 2 to an intimate interconnection of the touching elements 5 ,

3 zeigt eine weitere alternative Gestaltung der Halbzeughälften 1, 2. Dabei sind die im Querschnitt trapezförmigen Elemente 5 der beiden Halbzeughälften 1, 2 invers zueinander angeordnet. Das Fügen der beiden Halbzeughälften erfolgt durch axiales Einschieben der Fügepartner in y-Richtung. 3 shows a further alternative design of the half-halfs 1 . 2 , Here are the trapezoidal in cross section elements 5 the two half-halfs 1 . 2 arranged inversely to each other. The joining of the two half-halves takes place by axial insertion of the joining partners in the y-direction.

4 zeigt ein Wabenprofil mit gerichteter Struktur (Wellpappwabe/Welle-Steg-Wabe), dass vorteilhaft für die Fertigung von stegförmigen Elementen 5 verwendet wird. Die Biegeumformung erfolgt dabei orthogonal oder parallel zu den Wabenhauptstegen. 4 shows a honeycomb profile with directional structure (corrugated honeycomb / wave-web honeycomb) that advantageous for the production of web-shaped elements 5 is used. The bending deformation takes place orthogonally or parallel to the honeycomb main webs.

11
HalbzeughälfteSemi-finished half
22
HalbzeughälfteSemi-finished half
33
Grundschichtbase layer
44
Deckschichttopcoat
55
stab-/streifenförmiges Elementrod / strip-shaped element
66
Seitenflächeside surface
77
Stirnflächeface

Claims (8)

Umformbares, flächiges Sandwich-Halbzeug, insbesondere für die Verwendung im Möbelbau sowie im Innenausbau, bestehend aus zwei Halbzeughälften (1), (2) mit je einer dünnwandigen, verformbaren Grund- oder Deckschicht (3), (4), auf der eine Anzahl stab- oder streifenförmiger Elemente (5) im wesentlichen parallel und zueinander beabstandet angeordnet sind.Formable, flat sandwich semifinished product, in particular for use in furniture construction and in interior fittings, consisting of two half-half halves ( 1 ) 2 ) each having a thin-walled, deformable base or cover layer ( 3 ) 4 ) on which a number of rod-shaped or strip-shaped elements ( 5 ) are arranged substantially parallel and spaced from each other. Umformbares, flächiges Sandwich-Halbzeugnach Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt der streifenförmiger Elemente (5) so gestaltet ist, dass die beiden Halbzeughälften in axialer Richtung (y-Richtung) oder frontal (z-Richtung) kämmend ineinander einschiebbar sind.Formable, flat sandwich semifinished product according to claim 1, characterized in that the cross section of the strip-shaped elements ( 5 ) Is designed so that the two half-halves in the axial direction (y-direction) or frontal (z-direction) are meshing inserted into one another. Umformbares, flächiges Sandwich-Halbzeug nach Anspruch 2, dadurch gekennzeichnet, dass der Querschnitt der streifenförmiger Elemente (5) rechteckig oder trapezförmig ausgebildet ist.Formable, flat sandwich semifinished product according to claim 2, characterized in that the cross section of the strip-shaped elements ( 5 ) is rectangular or trapezoidal. Umformbares, flächiges Sandwich-Halbzeug nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die beiden Halbzeughälften (1), (2) als formideale Gegenstücke ausgebildet sind.Formable, flat sandwich semi-finished product according to one of the preceding claims, characterized in that the two half-half halves ( 1 ) ( 2 ) are designed as formideal counterparts. Umformbares, flächiges Sandwich-Halbzeug nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Grund- und/oder Deckschicht (3), (4) aus Papier, Pappe, verdichtetem Laminat, Holzfurnier, faserverstärktem Kunststoff oder aus einer Kombination dieser Werkstoffe besteht.Formable, flat sandwich semifinished product according to one of the preceding claims, characterized in that the base and / or outer layer ( 3 ) 4 ) consists of paper, cardboard, compressed laminate, wood veneer, fiber-reinforced plastic or a combination of these materials. Umformbares, flächiges Sandwich-Halbzeug nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die stab- oder streifenförmiger Elemente (5) aus Schaumstoff oder Wabenstrukturen oder Hohlkörpern aus Papier oder Pappe bestehen.Formable, flat sandwich semifinished product according to one of the preceding claims, characterized in that the rod-shaped or strip-shaped elements ( 5 ) consist of foam or honeycomb structures or hollow bodies of paper or cardboard. Umformbares, flächiges Sandwich-Halbzeug nach Anspruch 6, dadurch gekennzeichnet, dass die Hohlkörpern aus miteinander verbundenen Röhrchen bestehen.Formable, flat Sandwich semi-finished product according to claim 6, characterized in that the hollow bodies from interconnected tubes consist. Umformbares, flächiges Sandwich-Halbzeug nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die stabförmigen Elemente (5) zumindest an der Oberfläche eine offene Struktur aufweisen.Formable, flat sandwich semifinished product according to one of the preceding claims, characterized in that the rod-shaped elements ( 5 ) have an open structure at least on the surface.
DE102004057854A 2004-12-01 2004-12-01 Semi-finished product for use in cabinetry, has bar-shaped or lamellar units with rectangular cross section such that two semi-finished halves are joined by adhesive material provided on side surface of units Ceased DE102004057854A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101059B4 (en) 2014-01-28 2019-07-11 Roland Köhler wood panel

Citations (6)

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Publication number Priority date Publication date Assignee Title
EP0355912A2 (en) * 1988-08-15 1990-02-28 Adprotech B.V. Flat sandwich-shaped body
DE3831363A1 (en) * 1988-09-15 1990-03-29 Erbsloeh Julius & August METHOD FOR BENDING SANDWICH PLATES
US5232762A (en) * 1990-02-05 1993-08-03 Ruby Victor L Product of a two phase, self configuring coreless structural element for furniture and the like
DE4130620C2 (en) * 1991-09-14 1994-10-06 Eurocopter Deutschland Process for bending a flat object with a honeycomb structure
DE19527081C1 (en) * 1995-07-25 1996-09-19 Buderus Sell Flat light construction element
DE69209474T2 (en) * 1991-12-26 1996-11-28 Lucien Poincelet Device for the production of floors or various sandwich panels and elements used for their production

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355912A2 (en) * 1988-08-15 1990-02-28 Adprotech B.V. Flat sandwich-shaped body
DE3831363A1 (en) * 1988-09-15 1990-03-29 Erbsloeh Julius & August METHOD FOR BENDING SANDWICH PLATES
US5232762A (en) * 1990-02-05 1993-08-03 Ruby Victor L Product of a two phase, self configuring coreless structural element for furniture and the like
DE4130620C2 (en) * 1991-09-14 1994-10-06 Eurocopter Deutschland Process for bending a flat object with a honeycomb structure
DE69209474T2 (en) * 1991-12-26 1996-11-28 Lucien Poincelet Device for the production of floors or various sandwich panels and elements used for their production
DE19527081C1 (en) * 1995-07-25 1996-09-19 Buderus Sell Flat light construction element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101059B4 (en) 2014-01-28 2019-07-11 Roland Köhler wood panel

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