FR2868733A1 - Laminated wood sheet which can be heat shaped, for automobile interiors e.g. the instrument panel, has translucent thermoplastic claddings laminated to both sides for protection against atmospheric oxygen - Google Patents

Laminated wood sheet which can be heat shaped, for automobile interiors e.g. the instrument panel, has translucent thermoplastic claddings laminated to both sides for protection against atmospheric oxygen Download PDF

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Publication number
FR2868733A1
FR2868733A1 FR0403792A FR0403792A FR2868733A1 FR 2868733 A1 FR2868733 A1 FR 2868733A1 FR 0403792 A FR0403792 A FR 0403792A FR 0403792 A FR0403792 A FR 0403792A FR 2868733 A1 FR2868733 A1 FR 2868733A1
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Prior art keywords
sheet
wood
wood sheet
composite
layer
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Granted
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FR0403792A
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French (fr)
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FR2868733B1 (en
Inventor
Godefroy Beau
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Faurecia Interieur Industrie SAS
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Faurecia Interieur Industrie SAS
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Classifications

    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14811—Multilayered articles
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/047—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
    • B32B37/203—One or more of the layers being plastic
    • B32B37/206—Laminating a continuous layer between two continuous plastic 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K37/00—Dashboards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/14—Wood, e.g. woodboard or fibreboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0029—Translucent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2307/71—Resistive to light or to UV
    • 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
    • B32B2307/738—Thermoformability
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • 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
    • B32B2605/003—Interior finishings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

The material (1) for heat shaping, as an interior automobile lining, has a decorative wood sheet (3) with a cladding layer (5) of a translucent thermoplastic on the visible side and a thermoplastic cladding layer (7) on the rear side. The wood sheet is passed between rotating rollers (11), which press the cladding layers against it on both sides in a lamination. The visible cladding layer is colored, and acts as a UV filter. The wood sheet is in at least two layers, glued together, with their fibers at different orientations.

Description

La présente invention concerne un matériau composite en feuilleThe present invention relates to a composite sheet material

thermoformable pour garniture intérieure de véhicule automobile, comprenant une feuille de bois décoratif qui présente une face d'aspect et une face  thermoformable insert for a motor vehicle interior trim, comprising a decorative wood sheet having an aspect face and a face

arrière.back.

Dans l'état de la technique, les feuilles de bois décoratif utilisées pour réaliser des éléments de garniture intérieure d'un véhicule se présentent avec de très faibles épaisseurs, de façon à permettre leur mise en forme selon des surfaces non planes.  In the state of the art, the decorative wood sheets used to produce the interior trim elements of a vehicle are presented with very small thicknesses, so as to allow their shaping on non-planar surfaces.

L'opération de mise en forme de la feuille de bois, qui s'effectue généralement au cours d'une opération de thermoformage, est extrêmement délicate et peut s'accompagner d'une détérioration. Par exemple, le formage de la feuille de bois peut conduire à une rupture des fibres de bois, donc à une fissuration visible de la feuille, ainsi qu'à un brunissement non souhaité du bois, par combustion lors de sa mise en température de thermoformage.  The shaping operation of the wood sheet, which is generally carried out during a thermoforming operation, is extremely delicate and may be accompanied by deterioration. For example, the forming of the wood sheet can lead to a rupture of the wood fibers, and therefore to visible cracking of the sheet, as well as to an unwanted browning of the wood, by combustion during its thermoforming temperature setting .

Ainsi, les qualités esthétiques de la feuille de 20 bois décoratif peuvent être nettement altérées au cours de sa mise en forme.  Thus, the aesthetic qualities of the decorative wood leaf can be significantly altered during its shaping.

L'invention a pour objet de résoudre ces inconvénients, et de préserver la feuille de bois décoratif des détériorations d'origines mécanique et thermique pouvant se produire lors du formage.  The object of the invention is to overcome these drawbacks, and to preserve the decorative wood sheet from deteriorations of mechanical and thermal origin which may occur during forming.

Cet objectif est atteint par l'invention, qui a pour objet un matériau composite en feuille du type ci-dessus, comprenant en outre une couche de revêtement d'aspect en matériau thermoplastique translucide, couvrant la face d'aspect de la feuille de bois, et une couche arrière en matériau thermoplastique couvrant la face arrière de la feuille de bois.  This object is achieved by the invention, which relates to a sheet composite material of the above type, further comprising an appearance coating layer of translucent thermoplastic material, covering the aspect face of the wood sheet. , and a back layer of thermoplastic material covering the back side of the wood sheet.

Grâce à cette disposition, la feuille de bois décoratif conserve sa face d'aspect visible et se voit dotée d'un enrobage de matériau thermoplastique, dans lequel sont dérivées les contraintes mécaniques de thermoformage, et isolant la feuille de bois de l'atmosphère oxygénée, de sorte que cette dernière est préservée des phénomènes de combustion.  With this arrangement, the decorative wood sheet retains its face of visible appearance and is provided with a coating of thermoplastic material, in which are derived the mechanical stresses of thermoforming, and insulating the wood sheet of the oxygenated atmosphere , so that the latter is preserved from combustion phenomena.

Suivant des modes particuliers de réalisation de l'invention, cette dernière peut comprendre une ou plusieurs des caractéristiques suivantes, prises seules ou selon toutes les combinaisons techniquement envisageables: - le matériau thermoplastique formant couche de revêtement d'aspect contient un colorant; - le matériau thermoplastique formant couche de 15 revêtement d'aspect possède des caractéristiques filtrantes d'ultraviolets; - le matériau thermoplastique formant couche arrière contient un colorant; - le matériau formant couche arrière est une mousse 20 thermoplastique, notamment une mousse polypropylène ou une mousse polyéthylène; - la feuille de bois est formée d'au moins deux couches de bois collées ensemble; et - lesdites couches de bois ont des orientations de 25 fibres différentes l'une par rapport à l'autre.  According to particular embodiments of the invention, the latter may comprise one or more of the following characteristics, taken alone or in any technically feasible combination: the thermoplastic material forming an appearance coating layer contains a dye; the thermoplastic material forming the appearance coating layer has ultraviolet filtering characteristics; the rear layer thermoplastic material contains a dye; the back layer material is a thermoplastic foam, especially a polypropylene foam or a polyethylene foam; - the wood sheet is formed of at least two layers of wood glued together; and said wood layers have different fiber orientations with respect to each other.

L'invention vise également un élément de garniture intérieure de véhicule automobile, notamment de planche de bord, comprenant une feuille de matériau composite tel que décrit précédemment, et une pièce en matière plastique solidaire de la couche arrière.  The invention is also directed to an interior trim element of a motor vehicle, in particular a dashboard, comprising a sheet of composite material as described above, and a piece of plastic material integral with the rear layer.

L'invention vise en outre un procédé de fabrication d'un matériau composite en feuille tel que décrit précédemment, dans laquelle la couche de revêtement d'aspect est appliquée sur la feuille de bois au cours d'une opération de laminage.  The invention is further directed to a method of manufacturing a composite sheet material as previously described, wherein the appearance coating layer is applied to the wood sheet during a rolling operation.

Suivant d'autres caractéristiques, optionnelles, du procédé conforme à l'invention - préalablement à l'opération de laminage, la feuille de bois subit une opération de compression selon son 10 épaisseur; - la couche arrière est appliquée sur la feuille de bois au cours de ladite opération de laminage, de façon simultanée par rapport à la couche de revêtement d'aspect; - le matériau en feuille est soumis à une opération de thermoformage après l'opération de laminage.  According to other optional features of the process according to the invention - prior to the rolling operation, the wood sheet undergoes a compression operation according to its thickness; - The back layer is applied to the wood sheet during said rolling operation, simultaneously with the appearance coating layer; - The sheet material is subjected to a thermoforming operation after the rolling operation.

L'invention vise enfin un procédé de fabrication d'un élément de garniture tel que décrit précédemment.  The invention finally relates to a method of manufacturing a packing element as described above.

Selon une première forme de réalisation de ce procédé, on injecte la matière plastique sur la couche arrière du matériau en feuille thermoformé obtenu au terme du procédé décrit plus haut.  According to a first embodiment of this method, the plastic material is injected onto the back layer of the thermoformed sheet material obtained at the end of the process described above.

Selon une deuxième forme de réalisation, on fabrique d'une part la pièce en matière plastique, et d'autre part le matériau composite en feuille grâce à un procédé tel que défini ci-dessus, et on réalise un gainage de la pièce en matière plastique avec le matériau composite en feuille.  According to a second embodiment, on the one hand, the piece of plastics material is produced, and on the other hand the composite sheet material by means of a process as defined above, and a sheathing of the piece of material is carried out. plastic with the composite sheet material.

Selon une troisième forme de réalisation, on réalise un thermoformage simultané de la pièce plastique et du matériau en feuille obtenu au terme d'un procédé tel que défini ci-dessus, après solidarisation de la pièce plastique et du matériau en feuille.  According to a third embodiment, simultaneous thermoforming of the plastic part and the sheet material obtained by means of a process as defined above, after the plastic part and the sheet material have been joined together.

Un mode particulier de réalisation de l'invention va maintenant être décrit plus en détail, en référence au dessin annexé, dont la Figure unique représente schématiquement, en coupe, un matériau en feuille conforme à l'invention, en cours de fabrication.  A particular embodiment of the invention will now be described in more detail with reference to the accompanying drawing, the single Figure shows schematically, in section, a sheet material according to the invention, being manufactured.

Sur la Figure, on a représenté une feuille 1 de matériau composite thermoformable destiné à constituer un élément de garniture intérieure de véhicule automobile, par exemple une bande décorative d'une paroi de planche de bord.  In the Figure, there is shown a sheet 1 of thermoformable composite material for constituting a motor vehicle interior trim element, for example a decorative strip of a dashboard wall.

Ce matériau en feuille, représenté en coupe transversale sur la Figure, comprend une couche centrale formée d'une feuille de bois 3, une couche extérieure 5 formant revêtement d'aspect, appliquée sur la face extérieure (ou visible) de la feuille de bois 3, et une couche intérieure ou arrière 7 formant substrat, appliquée sur l'autre face (arrière) de la feuille de bois 3.  This sheet material, shown in cross section in the Figure, comprises a central layer formed of a wood sheet 3, an outer layer 5 forming appearance coating, applied to the outer face (or visible) of the wood sheet 3, and an inner or rear layer 7 forming a substrate, applied on the other (rear) face of the wood sheet 3.

Bien que représenté comme une bande composite plane, le matériau en feuille 1 est prévu pour être conformé selon des profils ou surfaces complexes, c'est-à-dire au moins galbé(e)s.  Although represented as a flat composite strip, the sheet material 1 is intended to be shaped according to profiles or complex surfaces, that is to say at least curved (e) s.

La feuille de bois 3 est constituée d'un bois de décoration, dans une épaisseur suffisamment faible pour que la feuille de bois puisse adopter une forme galbée sans rupture.  The wood sheet 3 consists of a decorative wood, in a sufficiently small thickness so that the wood sheet can adopt a curved shape without breaking.

On peut préciser que la feuille de bois 3 a, dans l'exemple illustré, une fonction essentiellement voire uniquement décorative, à l'exclusion de toute fonction mécanique ou structurelle, et que le bois est choisi principalement pour ses qualités esthétiques.  It may be noted that the wood sheet 3 has, in the illustrated example, a function that is essentially or even solely decorative, to the exclusion of any mechanical or structural function, and that the wood is chosen mainly for its aesthetic qualities.

La feuille de bois 3 peut être mono-couche, mais également, de façon alternative, être formée de deux couches ou plus, collées les unes sur les autres. Deux couches voisines, dans ce cas, ont de préférence des orientations de fibres différentes. 30  The wood sheet 3 may be single-layer, but alternatively, be formed of two or more layers, glued on each other. In this case, two neighboring layers preferably have different fiber orientations. 30

2868733 5 La couche de revêtement d'aspect 5 est formée essentiellement d'une matrice en matériau thermoplastique, qui est translucide de façon que la feuille de bois 3 soit laissée apparente.  The appearance coating layer 5 is formed essentially of a matrix of thermoplastic material, which is translucent so that the wood sheet 3 is left exposed.

La matrice thermoplastique possède de préférence des caractéristiques filtrantes d'ultraviolets, de façon que la feuille de bois soit préservée des effets de vieillissement dus à ce type de rayonnements.  The thermoplastic matrix preferably has ultraviolet filtering characteristics, so that the wood sheet is preserved from aging effects due to this type of radiation.

L'épaisseur de la couche de revêtement 5 sera 10 choisie en fonction de l'effet de profondeur et de relief qui doit être donné.  The thickness of the coating layer 5 will be chosen according to the depth and relief effect to be given.

Selon le type de bois utilisé et l'impression visuelle que l'on veut donner, il peut être souhaitable également d'incorporer un colorant dans la matrice thermoplastique constitutive de la couche de revêtement d'aspect 5.  Depending on the type of wood used and the visual impression that is to be given, it may also be desirable to incorporate a dye in the thermoplastic matrix constituting the appearance coating layer 5.

D'autres effets visuels ou tactiles peuvent être obtenus en choisissant convenablement la matrice thermoplastique de la couche 5, ou par incorporation d'additifs.  Other visual or tactile effects can be obtained by suitably selecting the thermoplastic matrix of the layer 5, or by incorporating additives.

Par exemple, la couche de revêtement 5 peut être formée avec un grainage.  For example, the coating layer 5 may be formed with a graining.

Bien entendu, la couche 5 est fixée sur la face de la feuille de bois 3 qui est visible depuis l'intérieur de l'habitacle, c'est-à-dire la face d'aspect, encore appelée face extérieure.  Of course, the layer 5 is fixed on the face of the wood sheet 3 which is visible from the inside of the passenger compartment, that is to say the appearance face, also called outer face.

La couche arrière 7 formant substrat est fixée sur la face opposée, c'està-dire la face intérieure, de la feuille de bois 3.  The rear layer 7 forming a substrate is fixed on the opposite face, that is to say the inner face, of the wood sheet 3.

Cette couche 7 comprend une matrice thermoplastique, qui peut être identique à la matrice de la couche 5 ou différente.  This layer 7 comprises a thermoplastic matrix, which may be identical to the matrix of the layer 5 or different.

La couche 7 peut avantageusement contenir un colorant, dans le cas où la feuille de bois 3 est d'une très faible épaisseur, telle que la feuille de bois est diaphane, afin de constituer un fond coloré dont la couleur est perceptible depuis l'extérieur.  The layer 7 may advantageously contain a dye, in the case where the wood sheet 3 is of a very small thickness, such that the wood sheet is diaphanous, to form a colored background whose color is noticeable from the outside .

Le matériau thermoplastique constitutif de la couche 7 peut être une mousse thermoplastique, telle que de la mousse polypropylène ou de la mousse polyéthylène partiellement réticulée, à cellules ouvertes ou fermées.  The thermoplastic material constituting the layer 7 may be a thermoplastic foam, such as polypropylene foam or partially crosslinked polyethylene foam, with open or closed cells.

Les couches de revêtement d'aspect 5 et arrière 7 assurent une fonction de protection mécanique de la feuille de bois, et facilitent la mise en forme de cette dernière, notamment à chaud. Les risques de cassure de la feuille de bois lors de cette opération sont minimisés par la présence de ces couches en matériau thermoplastique.  The appearance of the coating layers 5 and 7 back provide a mechanical protection function of the wood sheet, and facilitate the shaping of the latter, especially hot. The risks of breaking of the wood sheet during this operation are minimized by the presence of these layers of thermoplastic material.

La couche 7 est de préférence adaptée pour assurer une bonne liaison mécanique, résistante et stable, avec le corps de la garniture ou de l'équipement, en l'occurrence le corps de planche de bord.  The layer 7 is preferably adapted to ensure a good mechanical connection, resistant and stable, with the body of the trim or equipment, in this case the dashboard body.

Cela n'a pas été représenté sur la Figure, mais le matériau en feuille 1 peut être associé, pour former un élément de garniture intérieure de véhicule, à une pièce (ou insert) solidaire en matériau plastique.  This has not been shown in the Figure, but the sheet material 1 may be associated, to form a vehicle interior trim member, with a piece (or insert) integral with plastic material.

Un tel élément de garniture comprend alors, outre la feuille composite 1 constituée des trois couches 3, 5, 7, une pièce (ou insert) en matière plastique solidarisée à l'arrière de cette feuille composite, sur la couche formant substrat 7. Cette pièce en matière plastique pourra être notamment réalisée dans la matière plastique constituant le corps de la planche de bord.  Such a lining element then comprises, in addition to the composite sheet 1 consisting of the three layers 3, 5, 7, a piece (or insert) of plastic material secured to the rear of this composite sheet, on the substrate layer 7. This plastic part may be made in particular in the plastic material constituting the body of the dashboard.

La feuille composite 1 qui a été décrite précédemment peut être avantageusement réalisée au cours d'une même opération de laminage, dans laquelle les couches 5, 7 sont simultanément appliquées sur les faces respectives de la feuille de bois 3.  The composite sheet 1 which has been described above can advantageously be made during a single rolling operation, in which the layers 5, 7 are simultaneously applied to the respective faces of the wood sheet 3.

Cette opération de laminage a été illustrée de façon schématique sur la Figure, laquelle montre la feuille de bois 3 transitant selon la direction indiquée par la flèche centrale, entre deux rouleaux rotatifs 11 de laminoir. Les deux rouleaux 11 assurent en continu le pressage et la fixation de la couche de revêtement 5 et de la couche formant substrat 7, respectivement, sur la feuille de bois 3.  This rolling operation has been illustrated schematically in the Figure, which shows the wood sheet 3 passing in the direction indicated by the central arrow, between two rotary rollers 11 of the rolling mill. The two rollers 11 continuously ensure the pressing and fixing of the coating layer 5 and the substrate layer 7, respectively, on the wood sheet 3.

Préalablement à cette opération de laminage, la feuille de bois 3 peut être compressée selon son épaisseur, de façon à être enrobée ensuite à l'état compressé (ou calandrée ), entre les couches de matériau thermoplastique lors de l'opération de laminage.  Prior to this rolling operation, the wood sheet 3 can be compressed according to its thickness, so as to be subsequently coated in the compressed (or calendered) state, between the layers of thermoplastic material during the rolling operation.

A la suite de l'opération de laminage, le matériau composite en feuille 1 est mis en forme au cours d'une opération de thermoformage pour adopter sa forme définitive.  As a result of the rolling operation, the sheet composite material 1 is shaped during a thermoforming operation to adopt its final shape.

Dans une opération ultérieure, on forme l'élément de garniture par injection (ou surmoulage) de matière plastique sur la couche arrière 7 du matériau en feuille thermoformé, la matière plastique injectée constituant l'insert.  In a subsequent operation, the packing member is formed by injection (or over-molding) of plastic material onto the back layer 7 of the thermoformed sheet material, the injected plastic material constituting the insert.

En variante, on pourra réaliser l'élément de garniture par d'autres procédés connus permettant de rapporter une peau thermoplastique sur un insert. Par exemple, on pourra réaliser un gainage du matériau composite en feuille sur l'insert préalablement fabriqué. Selon un autre procédé, on pourra thermoformer la feuille et l'insert en même temps, après les avoir rendus solidaires. Cette opération de thermoformage simultané est dite one shot .  Alternatively, it can achieve the lining element by other known methods for reporting a thermoplastic skin on an insert. For example, we can achieve a cladding of the composite sheet material on the previously manufactured insert. According to another method, it will be possible to thermoform the sheet and the insert at the same time, after making them integral. This simultaneous thermoforming operation is called one shot.

Claims (15)

REVENDICATIONS 1. Matériau composite en feuille thermoformable pour garniture intérieure de véhicule automobile, comprenant une feuille de bois décoratif (3) qui présente une face d'aspect et une face arrière, caractérisé en ce qu'il comprend en outre une couche de revêtement d'aspect (5) en matériau thermoplastique translucide, couvrant la face d'aspect de la feuille de bois (3), et une couche arrière (7) en matériau thermoplastique couvrant la face arrière de la feuille de bois (3).  A thermoformable sheet composite material for a motor vehicle interior trim, comprising a decorative wood sheet (3) which has an aspect face and a rear face, characterized in that it further comprises a coating layer of aspect (5) of translucent thermoplastic material, covering the appearance face of the wood sheet (3), and a back layer (7) of thermoplastic material covering the rear face of the wood sheet (3). 2. Matériau composite suivant la revendication 1, caractérisé en ce que le matériau thermoplastique formant couche de revêtement d'aspect (5) contient un colorant.  Composite material according to Claim 1, characterized in that the thermoplastic material forming the appearance coating layer (5) contains a colorant. 3. Matériau composite suivant la revendication 1 ou 2, caractérisé en ce que le matériau thermoplastique formant couche de revêtement d'aspect (5) possède des caractéristiques filtrantes d'ultraviolets.  Composite material according to Claim 1 or 2, characterized in that the thermoplastic material forming the appearance coating layer (5) has ultraviolet filter characteristics. 4. Matériau composite suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le matériau thermoplastique formant couche arrière (7) contient un colorant.  4. Composite material according to any one of claims 1 to 3, characterized in that the rear layer thermoplastic material (7) contains a dye. 5. Matériau composite suivant la revendication 4, caractérisé en ce que le matériau formant couche arrière (7) est une mousse thermoplastique, notamment une mousse polypropylène ou une mousse polyéthylène.  5. Composite material according to claim 4, characterized in that the back layer material (7) is a thermoplastic foam, in particular a polypropylene foam or a polyethylene foam. 6. Matériau composite suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la feuille de bois (3) est formée d'au moins deux couches de bois collées ensemble.  6. composite material according to any one of claims 1 to 5, characterized in that the wood sheet (3) is formed of at least two layers of wood glued together. -30  -30 7. Matériau composite suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que lesdites couches de bois ont des orientations de fibres différentes l'une par rapport à l'autre.7. Composite material according to any one of claims 1 to 6, characterized in that said wood layers have different fiber orientations with respect to each other. 8. Elément de garniture intérieure de véhicule automobile, notamment de planche de bord, comprenant une feuille de matériau composite suivant l'une quelconque des revendications 1 à 7, et une pièce en matière plastique solidaire de ladite couche arrière (7).  8. Interior trim element of a motor vehicle, in particular instrument panel, comprising a sheet of composite material according to any one of claims 1 to 7, and a plastic part integral with said rear layer (7). 9. Procédé de fabrication d'un matériau composite en feuille selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la couche de revêtement d'aspect (5) est appliquée sur la feuille de bois (3) au cours d'une opération de laminage (3).  9. A method of manufacturing a composite sheet material according to any one of claims 1 to 6, characterized in that the appearance coating layer (5) is applied to the wood sheet (3) during a rolling operation (3). 10. Procédé selon la revendication 9, caractérisé en ce que, préalablement à l'opération de laminage, la feuille de bois (3) subit une opération de compression selon son épaisseur.  10. The method of claim 9, characterized in that, prior to the rolling operation, the wood sheet (3) undergoes a compression operation according to its thickness. 11. Procédé suivant la revendication 9 ou 10, caractérisé en ce que la couche arrière (7) est appliquée sur la feuille de bois (3) au cours de ladite opération de laminage, de façon simultanée par rapport à la couche de revêtement d'aspect (5).  Method according to claim 9 or 10, characterized in that the back layer (7) is applied to the wood sheet (3) during said rolling operation, simultaneously with the coating layer of aspect (5). 12. Procédé suivant la revendication 11, caractérisé en ce que le matériau en feuille (1) est soumis à une opération de thermoformage après l'opération de laminage.  12. The method of claim 11, characterized in that the sheet material (1) is subjected to a thermoforming operation after the rolling operation. 13. Procédé de fabrication d'un élément de garniture selon la revendication 8, caractérisé en ce qu'on injecte la matière plastique sur la couche arrière (7) du matériau en feuille thermoformé obtenu au terme du procédé selon la revendication 12.  13. A method of manufacturing a packing element according to claim 8, characterized in that the plastic material is injected onto the back layer (7) of the thermoformed sheet material obtained at the end of the process according to claim 12. 14. Procédé de fabrication d'un élément de garniture selon la revendication 8, caractérisé en ce qu'on fabrique d'une part la pièce en matière plastique, et d'autre part le matériau composite en feuille grâce à un procédé selon la revendication 12, et on réalise un gainage de la pièce en matière plastique avec le matériau composite en feuille.  14. A method of manufacturing a lining element according to claim 8, characterized in that manufactures firstly the plastic part, and secondly the composite sheet material by a method according to claim 12, and the plastic part is clad with the composite sheet material. 15. Procédé de fabrication d'un élément de garniture selon la revendication 8, caractérisé en ce qu'on réalise un thermoformage simultané de la pièce plastique et du matériau en feuille obtenu au terme du procédé selon la revendication 11, après solidarisation de la pièce plastique et du matériau en feuille.  15. A method of manufacturing a packing element according to claim 8, characterized in that a simultaneous thermoforming of the plastic part and the sheet material obtained at the end of the process according to claim 11, after the joining of the piece. plastic and sheet material.
FR0403792A 2004-04-09 2004-04-09 THERMOFORMABLE SHEET COMPOSITE MATERIAL FOR AUTOMOBILE INTERIOR TRIM WITH DECORATIVE WOOD SHEET, VEHICLE TRIM MEMBER COMPRISING SUCH MATERIAL, AND METHODS OF MANUFACTURING THE SAME Expired - Fee Related FR2868733B1 (en)

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EP1911580A1 (en) 2006-10-10 2008-04-16 Lisa Dräxlmaier GmbH Method for manufacturing parts with veneer-film laminate
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DE102012101314A1 (en) * 2012-02-17 2013-08-22 Novem Car Interior Design Gmbh Mold part e.g. decoration part for installing e.g. door linings, has transparent and/or translucent coating layer provided on front side of decoration layer, where paint forms coating layer on decoration layer
DE102012101315A1 (en) * 2012-02-17 2013-08-22 Novem Car Interior Design Gmbh Mold part e.g. decoration part for installing e.g. door linings, has transparent and/or translucent coating layer provided on front side of decoration layer, where paint forms coating layer on decoration layer
DE102012101315B4 (en) 2012-02-17 2018-07-05 Novem Car Interior Design Gmbh Molded part and method for producing a molded part
DE102012101314B4 (en) 2012-02-17 2018-07-05 Novem Car Interior Design Gmbh Molded part and method for producing a molded part
FR2991899A1 (en) * 2012-06-14 2013-12-20 Faurecia Interieur Ind Method for manufacturing garnishing panel e.g. door panel, in passenger compartment of car, involves placing coating against wall, and controlling temperature of wall until temperature of shaping of coating
US11407153B2 (en) 2017-10-05 2022-08-09 Hib Trim Part Solutions Gmbh Method for producing a cladding part for vehicles
WO2020021173A1 (en) 2018-07-26 2020-01-30 Psa Automobiles Sa Method for producing a set of trim elements having a decorative covering

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