FR3030430A1 - AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL - Google Patents
AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL Download PDFInfo
- Publication number
- FR3030430A1 FR3030430A1 FR1553679A FR1553679A FR3030430A1 FR 3030430 A1 FR3030430 A1 FR 3030430A1 FR 1553679 A FR1553679 A FR 1553679A FR 1553679 A FR1553679 A FR 1553679A FR 3030430 A1 FR3030430 A1 FR 3030430A1
- Authority
- FR
- France
- Prior art keywords
- layer
- foam
- core
- structural
- panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010410 layer Substances 0.000 claims abstract description 107
- 239000006260 foam Substances 0.000 claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 239000011247 coating layer Substances 0.000 claims abstract description 18
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 7
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 241000208202 Linaceae Species 0.000 claims description 4
- 235000004431 Linum usitatissimum Nutrition 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000005253 cladding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
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- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
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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
- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/245—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/20—Making multilayered or multicoloured articles
- B29C43/203—Making multilayered articles
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- 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
- B32B3/04—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 characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B32B3/08—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 characterised by added members at particular parts
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- B32B3/26—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
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- 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
- B32B3/26—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B32B5/02—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 structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- 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
- B32B5/14—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 a layer differing constitutionally or physically in different parts, e.g. denser near its faces
- B32B5/142—Variation across the area of the layer
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- 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
- B32B5/14—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 a layer differing constitutionally or physically in different parts, e.g. denser near its faces
- B32B5/145—Variation across the thickness of the layer
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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
- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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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
- 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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/28—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
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- 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
- 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
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- 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
- 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
- B60R13/0268—Rear parcel liners
-
- 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
- B29L2031/3041—Trim 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
- B32B2250/00—Layers arrangement
- B32B2250/04—4 layers
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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
- B32B2250/00—Layers arrangement
- B32B2250/44—Number of layers variable across the laminate
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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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
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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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
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- B32B2266/0278—Polyurethane
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/718—Weight, e.g. weight per square meter
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- B32—LAYERED PRODUCTS
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- B32B2307/732—Dimensional properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2605/00—Vehicles
- B32B2605/003—Interior finishings
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- 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
- B32B2605/00—Vehicles
- B32B2605/08—Cars
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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
- B32B2607/00—Walls, panels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
L'invention concerne un panneau (1) comprenant une âme (2) structurelle présentant une partie centrale (3) et une partie périphérique (4), ladite âme comprenant, juxtaposées l'une sur l'autre : une couche structurelle (5) thermo-comprimée; une couche de mousse (6) de polyuréthanne, ledit panneau comprenant en outre : une couche de revêtement d'endroit (7) recouvrant ladite couche structurelle ; une couche de revêtement d'envers (8) recouvrant ladite couche de mousse, ladite couche de mousse s'étendant sur toute la surface de ladite couche structurelle, ladite couche de mousse étant fortement comprimée sur ladite partie périphérique, de manière à présenter une épaisseur résiduelle inférieure ou égale à 0,5 mm - étant notamment inférieure ou égale à 0,2 mm -, de sorte que l'épaisseur de ladite âme en ladite partie périphérique soit essentiellement constituée par l'épaisseur de ladite couche structurelle, lesdites couches de revêtement se rejoignant bord à bord selon une ligne de jonction (10), de manière à masquer la tranche (11) de ladite âme, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne.The invention relates to a panel (1) comprising a structural core (2) having a central portion (3) and a peripheral portion (4), said core comprising, juxtaposed one on the other: a structural layer (5) thermo-compressed; a polyurethane foam layer (6), said panel further comprising: a location coating layer (7) overlying said structural layer; a backing layer (8) covering said layer of foam, said layer of foam extending over the entire surface of said structural layer, said layer of foam being strongly compressed on said peripheral portion, so as to have a thickness residual less than or equal to 0.5 mm - being in particular less than or equal to 0.2 mm -, so that the thickness of said core in said peripheral portion is essentially constituted by the thickness of said structural layer, said layers of coating joining edge to edge along a junction line (10), so as to mask the wafer (11) of said core, said coating layers being trenched in the raz of said wafer and said line.
Description
L'invention concerne un panneau d'habillage intérieur de véhicule automobile et un procédé de réalisation d'un tel panneau. Il est connu de réaliser un panneau d'habillage intérieur de véhicule automobile - notamment sous forme d'une tablette de recouvrement d'un compartiment à bagages -, ledit panneau comprenant une âme structurelle, ladite âme présentant une partie centrale et une partie périphérique, ladite âme comprenant, juxtaposées l'une sur l'autre : - une couche structurelle thermo-comprimée, - une couche de mousse de polyuréthanne, ladite couche s'étendant uniquement en ladite partie centrale, ledit panneau comprenant en outre : - une couche de revêtement d'endroit - notamment sous forme d'aiguilleté - recouvrant ladite couche structurelle, - une couche de revêtement d'envers - notamment sous forme de non tissé - recouvrant ladite couche de mousse et ladite couche structurelle en partie périphérique. La couche structurelle forme la structure de l'âme, afin qu'elle soit autoportante, et présente usuellement une masse surfacique comprise entre 1500 et 2200 g/m2. Quant à la couche de mousse, elle est destinée à réaliser une protection acoustique par absorption des ondes sonores et présente usuellement une masse surfacique comprise entre 650 et 1000 g/m2. Le panneau obtenu présente donc usuellement une masse importante. La couche de mousse est notamment fixée par collage à la couche structurelle, qui a été préalablement thermo-comprimée, ledit collage constituant une opération à part entière qui ajoute à la complexité de réalisation du panneau.The invention relates to an interior trim panel of a motor vehicle and a method of producing such a panel. It is known to produce an interior trim panel of a motor vehicle - in particular in the form of a covering tablet of a luggage compartment - said panel comprising a structural core, said core having a central portion and a peripheral portion, said core comprising, juxtaposed one on the other: - a thermo-compressed structural layer, - a layer of polyurethane foam, said layer extending only in said central part, said panel further comprising: - a layer of location coating - particularly in the form of needle punch - covering said structural layer, - a backing coating layer - especially in the form of a nonwoven - covering said foam layer and said peripheral portion of the structural layer. The structural layer forms the structure of the core, so that it is self-supporting, and usually has a weight per unit area of between 1500 and 2200 g / m2. As for the foam layer, it is intended to provide acoustic protection by absorption of sound waves and usually has a weight per unit area of between 650 and 1000 g / m2. The panel obtained therefore usually has a large mass. The foam layer is in particular fixed by bonding to the structural layer, which has been heat-compressed beforehand, said bonding constituting an operation in itself which adds to the complexity of producing the panel.
Ceci étant, un tel agencement permet de prévoir que les couches de revêtement se rejoignent bord à bord selon une ligne de jonction, de manière à masquer la tranche de l'âme, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne, ce qui permet de bénéficier d'une finition périphérique satisfaisante et simple à réaliser. Afin de s'affranchir de l'étape spécifique de fixation de la couche de mousse sur la couche structurelle, on pourrait prévoir que ladite couche de mousse s'étende sur toute la surface de ladite couche structurelle.That being so, such an arrangement makes it possible to provide for the coating layers to meet edge-to-edge along a junction line, so as to mask the edge of the core, said coating layers being cut off from said edge and said edge. line, which allows to benefit from a peripheral finish satisfactory and simple to achieve. In order to overcome the specific step of fixing the foam layer on the structural layer, it could be provided that said foam layer extends over the entire surface of said structural layer.
Ceci permettrait de fixer la couche de mousse sur la couche structurelle lors de l'étape de thermocompression, sans être confronté au problème du positionnement de ladite couche de mousse par rapport à ladite couche structurelle avant la thermocompression proprement dite.This would make it possible to fix the layer of foam on the structural layer during the thermocompression step, without being confronted with the problem of positioning said layer of foam with respect to said structural layer before thermocompression proper.
Cependant, il serait nécessaire, afin de masquer la tranche de l'âme en sa périphérie, de prévoir une bavette périphérique saillante - et peu esthétique - formée par la superposition des couches de revêtement d'endroit et d'envers.However, it would be necessary, in order to hide the edge of the soul at its periphery, to provide a projecting peripheral flap - and unsightly - formed by the superposition of the coating layers of place and back.
En effet, une réalisation où les couches de revêtement se rejoindraient bord à bord selon une ligne de jonction, de manière à masquer la tranche de l'âme, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne, n'est pas souhaitable.Indeed, an embodiment where the coating layers would join edge to edge along a junction line, so as to mask the edge of the core, said coating layers being sliced in the raz of said wafer and said line, n ' is not desirable.
En effet, la couche de mousse ne présente pas une robustesse suffisante pour éviter le risque d'un arrachement de la couche de revêtement d'envers pendant la durée de vie du panneau. Afin de disposer d'une finition périphérique plus satisfaisante, il pourrait être prévu un retour de la bavette vers la couche de mousse, ladite bavette étant alors soudée ou collée contre le revêtement d'envers pour pouvoir être maintenue en place.Indeed, the foam layer does not have sufficient strength to avoid the risk of tearing of the backcoating layer during the life of the panel. In order to have a more satisfactory peripheral finish, it could be provided a return of the flap to the foam layer, said flap then being welded or glued against the backing to be held in place.
Mais une telle réalisation suppose, lors de la fabrication du panneau, une étape spécifique de soudage ou collage de la bavette. L'invention a pour buts de pallier ces inconvénients en proposant un panneau léger, présentant de bonnes propriétés de protection acoustique, de fabrication simplifiée et pourvu d'une finition périphérique esthétique et robuste obtenue de façon particulièrement simple. A cet effet et selon un premier aspect, l'invention propose un panneau d'habillage intérieur de véhicule automobile - notamment sous forme d'une tablette de recouvrement d'un compartiment à bagages -, ledit panneau comprenant une âme structurelle, ladite âme présentant une partie centrale et une partie périphérique, ladite âme comprenant, juxtaposées l'une sur l'autre : - une couche structurelle thermo-comprimée, - une couche de mousse de polyuréthanne, ledit panneau comprenant en outre : - une couche de revêtement d'endroit - notamment sous forme d'aiguilleté - recouvrant ladite couche structurelle, - une couche de revêtement d'envers - notamment sous forme de non tissé - recouvrant ladite couche de mousse, ledit panneau présentant en outre les caractéristiques suivantes : - ladite couche de mousse s'étend sur toute la surface de ladite couche structurelle, - ladite couche de mousse est fortement comprimée sur ladite partie périphérique, de manière à présenter une épaisseur résiduelle inférieure ou égale à 0,5 mm - étant notamment inférieure ou égale à 0,2 mm -, de sorte que l'épaisseur de ladite âme en ladite partie périphérique soit essentiellement constituée par l'épaisseur de ladite couche structurelle, - lesdites couches de revêtement se rejoignent bord à bord selon une ligne de jonction, de manière à masquer la tranche de ladite âme, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne.But such an embodiment assumes, during the manufacture of the panel, a specific step of welding or gluing the flap. The invention aims to overcome these disadvantages by providing a lightweight panel, having good acoustic protection properties, simplified manufacturing and provided with an aesthetic and robust peripheral finish obtained in a particularly simple manner. For this purpose and according to a first aspect, the invention proposes an interior trim panel for a motor vehicle - in particular in the form of a covering shelf of a luggage compartment - said panel comprising a structural core, said core presenting a central portion and a peripheral portion, said core comprising, juxtaposed one on the other: - a thermo-compressed structural layer, - a layer of polyurethane foam, said panel further comprising: - a coating layer of place - particularly in the form of needle punch - covering said structural layer, - a backing coating layer - especially in the form of a nonwoven - covering said foam layer, said panel further having the following characteristics: - said layer of foam extends over the entire surface of said structural layer, - said layer of foam is strongly compressed on said peripheral portion, so as to present a residual thickness of less than or equal to 0.5 mm, being in particular less than or equal to 0.2 mm, so that the thickness of said core in said peripheral portion essentially consists of the thickness of said structural layer; said cladding layers join edge to edge along a junction line, so as to mask the edge of said core, said cladding layers being cut off from said wafer and said line.
Avec l'agencement proposé, il est possible, notamment par l'utilisation de mousses de très faible densité avant thermocompression, d'obtenir des panneaux allégés par rapport à ceux de l'art antérieur. Par ailleurs, l'association de la couche de mousse à la couche structurelle peut être faite pendant l'étape de thermocompression, ce qui évite toute opération ultérieure de fixation de ladite couche de mousse par collage ou procédé analogue. Enfin, la finition périphérique est obtenue par une simple opération de découpe. Elle présente une esthétique optimale, du fait de la jonction des revêtements bord à bord selon une ligne, aucune bavette - avec retour ou non - n'étant prévue 15 pour réaliser la finition. Enfin, la mousse comprimée à une épaisseur résiduelle très faible présente une grande solidité, liée à sa grande compacité, le revêtement d'envers ne présentant plus le risque d'être arraché au cours de l'utilisation du panneau. 20 Selon un deuxième aspect, l'invention propose un procédé de réalisation d'un tel panneau. D'autres particularités et avantages de l'invention apparaîtront dans la 25 description qui suit, faite en référence à la figure jointe qui est une vue schématique partielle en coupe d'un panneau selon une réalisation. On décrit ci-dessous un panneau 1 d'habillage intérieur de véhicule automobile - notamment sous forme d'une tablette de recouvrement d'un compartiment à 30 bagages -, ledit panneau comprenant une âme 2 structurelle, ladite âme présentant une partie centrale 3 et une partie périphérique 4, ladite âme comprenant, juxtaposées l'une sur l'autre : - une couche structurelle 5 thermo-comprimée, 10 - une couche de mousse 6 de polyuréthanne, ledit panneau comprenant en outre : - une couche de revêtement d'endroit 7 - notamment sous forme d'aiguilleté - recouvrant ladite couche structurelle, - une couche de revêtement d'envers 8 - notamment sous forme de non tissé - recouvrant ladite couche de mousse, ledit panneau présentant en outre les caractéristiques suivantes : - ladite couche de mousse s'étend sur toute la surface de ladite couche structurelle, - ladite couche de mousse est fortement comprimée sur ladite partie périphérique, de manière à présenter une épaisseur résiduelle inférieure ou égale à 0,5 mm - étant notamment inférieure ou égale à 0,2 mm -, de sorte que l'épaisseur de ladite âme en ladite partie périphérique soit essentiellement constituée par l'épaisseur de ladite couche structurelle, - lesdites couches de revêtement se rejoignent bord à bord selon une ligne de jonction 10, de manière à masquer la tranche 11 de ladite âme, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne.With the proposed arrangement, it is possible, in particular by the use of foams of very low density before thermocompression, to obtain panels lightened compared to those of the prior art. Furthermore, the association of the foam layer with the structural layer can be made during the thermocompression step, which avoids any subsequent operation of fixing said foam layer by gluing or similar process. Finally, the peripheral finish is obtained by a simple cutting operation. It has an optimal aesthetic, because of the junction of the coatings edge to edge along a line, no flap - with return or not - being provided 15 to achieve the finish. Finally, the foam compressed to a very low residual thickness has a high strength, related to its high compactness, the backing no longer has the risk of being torn during use of the panel. According to a second aspect, the invention proposes a method of producing such a panel. Other features and advantages of the invention will appear in the description which follows, made with reference to the attached figure which is a partial schematic sectional view of a panel according to one embodiment. A panel 1 for interior trim of a motor vehicle - in particular in the form of a covering tablet of a luggage compartment - is described below, said panel comprising a structural core 2, said core having a central portion 3 and a peripheral portion 4, said core comprising, juxtaposed one on the other: - a thermo-compressed structural layer 5, - a layer of polyurethane foam 6, said panel further comprising: - a coating layer of place 7 - in particular in the form of needled - covering said structural layer, - a backing layer 8 - in particular in the form of a nonwoven - covering said layer of foam, said panel further having the following characteristics: - said layer of foam extends over the entire surface of said structural layer, - said layer of foam is strongly compressed on said peripheral portion, so as to have a thickness residual less than or equal to 0.5 mm - being in particular less than or equal to 0.2 mm -, so that the thickness of said core in said peripheral portion consists essentially of the thickness of said structural layer, - said layers coating surfaces join edge to edge along a junction line 10, so as to hide the wafer 11 of said core, said coating layers being trenched in the raz of said wafer and said line.
Selon une réalisation, la couche de mousse 6 présente une masse surfacique inférieure ou égale à 300 g/m2, ce qui lui permet d'être comprimée jusqu'à une épaisseur résiduelle très faible en partie périphérique 4. Selon une réalisation, la couche structurelle 5 présente en partie périphérique 4 une épaisseur inférieure ou égale à 4 mm, étant notamment inférieure ou égale à 3 mm. Selon la réalisation représentée, la partie centrale 3 comprend au moins une zone faiblement comprimée 9 où la couche de mousse 6 présente une épaisseur supérieure ou égale à 12 mm, étant notamment comprise entre 15 et 30 mm.According to one embodiment, the foam layer 6 has a basis weight less than or equal to 300 g / m2, which allows it to be compressed to a very small residual thickness in the peripheral portion 4. In one embodiment, the structural layer 5 has a peripheral portion 4 a thickness less than or equal to 4 mm, being in particular less than or equal to 3 mm. According to the embodiment shown, the central portion 3 comprises at least one weakly compressed zone 9 where the foam layer 6 has a thickness greater than or equal to 12 mm, being in particular between 15 and 30 mm.
Selon une réalisation, la couche structurelle 5 est à base de feutre de fibres naturelles - telles que des fibres de lin ou de coton - ou synthétiques - telles que des fibres de verre -, liées entre elles par un liant thermoplastique.In one embodiment, the structural layer 5 is based on felt of natural fibers - such as flax or cotton fibers - or synthetic fibers - such as glass fibers - bonded together by a thermoplastic binder.
Dans ce cas, et comme représenté sur la figure, la couche structurelle 5 peut présenter en zone faiblement comprimée 9 une épaisseur supérieure ou égale à 4 mm, ladite épaisseur pouvant notamment aller jusqu'à 12 mm, de sorte que ladite couche structurelle puisse présenter des propriétés d'absorption acoustique liées à sa porosité.In this case, and as shown in the figure, the structural layer 5 may have in a weakly compressed zone 9 a thickness greater than or equal to 4 mm, said thickness possibly being up to 12 mm, so that said structural layer may present sound absorption properties related to its porosity.
Une telle épaisseur peut notamment être atteinte par l'utilisation d'une couche structurelle 5 de type « feutre gonflant ». Un tel feutre est fortement compressé lors de sa fabrication, pendant une étape de laminage, de manière à mettre les fibres en contrainte au sein du liant. Lors du chauffage du feutre à température de fusion du liant, les fibres reprennent leur forme à l'état non contraint et ledit feutre gonfle de façon importante, ce qui permet de disposer, sur le panneau 1, d'au moins une zone faiblement comprimée 9 dans laquelle la couche structurelle 5 présente une épaisseur telle que sus-décrite, qui permet de conférer à ladite couche structurelle, dans ladite zone, des propriétés d'absorption acoustique se cumulant à celles apportées par la couche de mousse 6.Such a thickness can in particular be achieved by the use of a structural layer 5 of the "swelling felt" type. Such a felt is strongly compressed during its manufacture, during a rolling step, so as to put the fibers in stress within the binder. When heating the felting agent at the binder's melting temperature, the fibers return to their unconstrained state and said felt swells considerably, which makes it possible to have on the panel 1 at least one weakly compressed zone. 9 in which the structural layer 5 has a thickness as described above, which makes it possible to confer on said structural layer, in said zone, acoustic absorption properties that accumulate with those provided by the foam layer 6.
Dans un tel feutre, la couche structurelle 5 présente notamment les caractéristiques suivantes : - le liant thermoplastique est à base de polypropylène, - le taux de fibres est compris entre 40 et 60 % en poids, et notamment entre 45 et 55 % en poids, - les fibres ont une longueur minimale de 3 mm.In such a felt, the structural layer 5 has in particular the following characteristics: the thermoplastic binder is based on polypropylene, the fiber content is between 40 and 60% by weight, and especially between 45 and 55% by weight; the fibers have a minimum length of 3 mm.
Selon une autre réalisation, la couche structurelle 5 est à base d'une matrice thermoplastique non poreuse chargée avec des fibres naturelles - telles que des fibres de lin, de coton ou de bois - ou synthétiques - telle que des fibres de verre.In another embodiment, the structural layer 5 is based on a non-porous thermoplastic matrix loaded with natural fibers - such as flax, cotton or wood fibers - or synthetic fibers - such as glass fibers.
Une telle matrice chargée peut être moulée par thermocom pression comme dans le cas du feutre précédemment décrit. Selon la réalisation représentée, la partie centrale 3 comprend au moins une zone de renfort 12 où la couche de mousse 6 est fortement comprimée, de manière à présenter une épaisseur résiduelle inférieure ou égale à 0,5 mm - étant notamment inférieure ou égale à 0,2 mm -, de sorte que l'épaisseur de l'âme 2 en ladite zone soit essentiellement constituée par l'épaisseur de ladite couche structurelle.Such a filled matrix may be molded by thermocompression as in the case of the previously described felt. According to the embodiment shown, the central portion 3 comprises at least one reinforcing zone 12 where the foam layer 6 is strongly compressed, so as to have a residual thickness less than or equal to 0.5 mm - being in particular less than or equal to 0 , 2 mm -, so that the thickness of the core 2 in said zone is essentially constituted by the thickness of said structural layer.
Selon une réalisation non représentée, le panneau 1 peut comprendre un organe fonctionnel en matériau thermoplastique soudée en envers d'une zone de renfort 12. Un tel organe est par exemple - dans le cas d'un panneau 1 sous forme d'une tablette destinée à être posée sur une tôle de recouvrement du compartiment à bagages du véhicule - un pied d'appui ou un clip de fixation sur ladite tôle. Selon la réalisation représentée, le panneau comprend un insert 13 de renfort, notamment métallique, disposé entre la couche structurelle 5 et la couche de mousse 6. Un tel insert 13 est notamment prévu dans le cas d'un panneau 1 sous forme d'une tablette de recouvrement d'un compartiment à bagages, ladite tablette n'étant pas destinée à être posée sur une tôle et devant présenter, de ce fait, une résistance importante à la flexion. Selon une réalisation, la couche structurelle 5 présente une masse surfacique comprise entre 1200 et 1800 g/m2.According to an embodiment not shown, the panel 1 may comprise a functional member made of thermoplastic material welded upside down of a reinforcing zone 12. Such a member is for example - in the case of a panel 1 in the form of a tablet intended to be placed on a cover plate of the luggage compartment of the vehicle - a support foot or a fastening clip on said sheet. According to the embodiment shown, the panel comprises a reinforcing insert 13, in particular a metal insert, placed between the structural layer 5 and the foam layer 6. Such an insert 13 is in particular provided in the case of a panel 1 in the form of a covering tablet of a luggage compartment, said tablet not being intended to be placed on a sheet and thus having a high resistance to bending. According to one embodiment, the structural layer 5 has a density of between 1200 and 1800 g / m2.
Selon une réalisation, la couche structurelle 5 comprend, lorsqu'elle est à base de feutre, des billes expansées.According to one embodiment, the structural layer 5 comprises, when it is based on felt, expanded beads.
La présence de telles billes permet d'obtenir une expansion accentuée de la couche structurelle 5, améliorant ses propriétés d'absorption acoustique. Selon une réalisation, la partie périphérique 4 présente une largeur développée 14 comprise entre 20 et 50 mm.The presence of such balls makes it possible to obtain an increased expansion of the structural layer 5, improving its acoustic absorption properties. According to one embodiment, the peripheral portion 4 has a developed width 14 of between 20 and 50 mm.
Selon une réalisation, la partie périphérique 4 s'étend sur toute la périphérie de l'âme 2. On décrit enfin un procédé de réalisation d'un tel panneau 1, ledit procédé comprenant les étapes suivantes : - superposer, dans un moule de thermocompression conformé à la géométrie du panneau 1 à obtenir, une couche de revêtement d'endroit 7, une couche structurelle 5, une couche de mousse de polyuréthanne 6 et une couche de revêtement d'envers 8, de manière à définir un multicouches, - réaliser une thermocompression dudit multicouches, de manière à conformer lesdites couches, et une découpe périphérique, ladite découpe étant notamment réalisée simultanément avec la thermocompression, ladite découpe étant réalisée de sorte que lesdites couches de revêtement se rejoignent bord à bord selon une ligne de jonction 10, de manière à masquer la tranche 11 de l'âme 2 formée par lesdites couche structurelle et de mousse, lesdites couches de revêtement étant tranchées au raz de ladite tranche et de ladite ligne.According to one embodiment, the peripheral portion 4 extends over the entire periphery of the core 2. Finally, a method of producing such a panel 1 is described, said method comprising the following steps: superimposing, in a thermocompression mold according to the geometry of the panel 1 to be obtained, a location coating layer 7, a structural layer 5, a layer of polyurethane foam 6 and a backing layer 8, so as to define a multilayer, - a thermocompression of said multilayer, so as to conform said layers, and a peripheral cut, said cut being in particular carried out simultaneously with the thermocompression, said cut being made such that said cladding layers join edge to edge along a junction line 10, so as to mask the slice 11 of the core 2 formed by said structural layer and foam, said layers of coating eta trenches at the edge of said slice and of said line.
Pour obtenir la couche de mousse 6, on peut notamment partir d'une plaque de mousse semi-rigide thermo-formable de faible densité - notamment de l'ordre de 0,015 - et de haute tortuosité, ce qui lui confère de très bonnes propriétés d'absorption acoustique.In order to obtain the foam layer 6, it is possible in particular to start from a low-density thermoformable semi-rigid foam plate - in particular of the order of 0.015 - and of high tortuosity, which gives it very good properties. sound absorption.
Selon une réalisation, la plaque de mousse avant thermo-compression présente une épaisseur comprise entre 10 et 20 mm.According to one embodiment, the foam plate before heat compression has a thickness of between 10 and 20 mm.
Le cas échéant, il peut être prévu d'insérer un insert 13 entre les couches structurelle 5 et de mousse 6 dans le multicouches avant la thermocompression.If necessary, it can be provided to insert an insert 13 between the structural layers 5 and foam 6 in the multilayer before thermocompression.
Claims (10)
Priority Applications (1)
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EP15199931.5A EP3037256A1 (en) | 2014-12-22 | 2015-12-14 | Method for producing an interior trim panel of a motor vehicle |
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FR1463161 | 2014-12-22 | ||
FR1463161A FR3030429B1 (en) | 2014-12-22 | 2014-12-22 | AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL |
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FR3053943B1 (en) * | 2016-07-12 | 2018-08-31 | Cera Aps | ACOUSTIC AND THERMAL PROTECTION SCREEN FOR MOTOR VEHICLE |
FR3095388B1 (en) * | 2019-04-26 | 2021-05-14 | Treves Products Services & Innovation | Automotive vehicle interior trim panel |
FR3126644B1 (en) * | 2021-09-07 | 2024-05-10 | Faurecia Automotive Ind | Part of motor vehicle equipment and associated manufacturing process |
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WO2001025055A1 (en) * | 1999-10-01 | 2001-04-12 | Lear Corporation | Sandwich structural door inner panel |
US20040247857A1 (en) * | 2003-06-03 | 2004-12-09 | Schroeder Jeffrey J. | Foam barrier heat shield |
Also Published As
Publication number | Publication date |
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FR3030430B1 (en) | 2018-10-19 |
FR3030429A1 (en) | 2016-06-24 |
FR3030429B1 (en) | 2018-05-25 |
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