FR3096608A1 - Process for making an interior trim panel for a motor vehicle - Google Patents

Process for making an interior trim panel for a motor vehicle Download PDF

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Publication number
FR3096608A1
FR3096608A1 FR1905655A FR1905655A FR3096608A1 FR 3096608 A1 FR3096608 A1 FR 3096608A1 FR 1905655 A FR1905655 A FR 1905655A FR 1905655 A FR1905655 A FR 1905655A FR 3096608 A1 FR3096608 A1 FR 3096608A1
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France
Prior art keywords
film
layer
polyurethane
complex
core
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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.)
Pending
Application number
FR1905655A
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French (fr)
Inventor
Eric BRILLON
Christophe Gillet
Christophe PENIT
Daniel Mezieres
Mathieu EYDT
Pierre Burstert
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Treves Products Services and Innovation SAS
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Treves Products Services and Innovation SAS
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Priority to FR1905655A priority Critical patent/FR3096608A1/en
Publication of FR3096608A1 publication Critical patent/FR3096608A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/001—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
    • B29D99/0021—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings provided with plain or filled structures, e.g. cores, placed between two or more plates or sheets, e.g. in a matrix
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • 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
    • 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
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B32B5/02—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
    • B32B5/08—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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • 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
    • 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
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0035—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied as liquid, gel, paste or the like
    • 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
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C2043/189—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the parts being joined
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • 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
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • 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
    • B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • 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
    • B32B2274/00—Thermoplastic elastomer 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • 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
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • 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
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives

Abstract

L’invention concerne un procédé de réalisation d’un panneau (1) d’habillage intérieur de véhicule automobile, ledit procédé prévoyant : d’habiller une paroi de cavité de moulage avec un complexe (5) pourvu d’un film (3) et d’une couche fibreuse (4) thermo-comprimée, ladite cavité étant définie de manière à préserver un espace vacant d’épaisseur généralement inférieure à 2 mm entre ledit film et la paroi de ladite cavité opposée à celle recevant ladite couche fibreuse ; de remplir ledit espace avec un mélange précurseur de polyuréthanne élastomère non expansé de manière à surmouler ledit complexe pour former une coque (6) présentant une couche externe (7) formée par ledit polyuréthanne élastomère ; et de coller ladite coque du côté de ladite couche fibreuse sur une face d’une âme (2) à base de mousse de polyuréthanne moulée. Figure 1The invention relates to a method for producing a panel (1) for interior trim of a motor vehicle, said method providing for: lining a mold cavity wall with a complex (5) provided with a film (3) and a thermo-compressed fibrous layer (4), said cavity being defined so as to preserve a vacant space of thickness generally less than 2 mm between said film and the wall of said cavity opposite to that receiving said fibrous layer; filling said space with a precursor mixture of unexpanded elastomeric polyurethane so as to overmold said complex to form a shell (6) having an outer layer (7) formed by said elastomeric polyurethane; and gluing said shell on the side of said fibrous layer on one face of a core (2) made from molded polyurethane foam. Figure 1

Description

Procédé de réalisation d’un panneau d’habillage intérieur de véhicule automobileProcess for producing a motor vehicle interior trim panel

L’invention concerne un procédé de réalisation d’un panneau d’habillage intérieur de véhicule automobile et un panneau réalisé par un tel procédé.The invention relates to a method for producing a motor vehicle interior trim panel and a panel produced by such a method.

Il est connu de mettre en œuvre un procédé de réalisation d’un panneau d’habillage intérieur de véhicule automobile, ledit procédé comprenant les étapes suivantes :It is known to implement a method for producing a motor vehicle interior trim panel, said method comprising the following steps:

  • prévoir une âme à base de mousse de polyuréthanne moulée,provide a core based on molded polyurethane foam,
  • disposer ladite âme contre une paroi d’une cavité de moulage d’un moule, ladite cavité étant définie de manière à préserver un espace vacant entre ladite âme et la paroi de ladite cavité opposée à celle recevant ladite âme, ledit espace présentant une épaisseur généralement inférieure à 2 mm,arranging said core against a wall of a molding cavity of a mould, said cavity being defined so as to preserve a vacant space between said core and the wall of said cavity opposite to that receiving said core, said space having a thickness generally less than 2 mm,
  • remplir ledit espace avec un mélange précurseur de polyuréthanne élastomère de manière à surmouler ladite âme,filling said space with an elastomeric polyurethane precursor mixture so as to overmold said core,
  • après réticulation dudit mélange, démouler l’ensemble dont une face présente une couche externe formée par ledit polyuréthanne élastomère, ladite couche externe présentant une épaisseur généralement inférieure à 2 mm.after cross-linking said mixture, unmold the assembly, one face of which has an outer layer formed by said elastomeric polyurethane, said outer layer having a thickness generally less than 2 mm.

On peut prévoir en outre d’associer, sur la face de l’âme opposée à celle pourvue de la couche de polyuréthanne élastomère, une couche de revêtement fibreuse.Provision may also be made to associate, on the face of the core opposite to that provided with the elastomeric polyurethane layer, a fibrous coating layer.

On dispose ainsi d’un panneau réversible, présentant une première face fibreuse et une deuxième face définie par la couche de polyuréthanne élastomère qui présente une épaisseur minime – généralement inférieure à 2 mm -, une robustesse accrue et une grande facilité de nettoyage.We thus have a reversible panel, having a first fibrous face and a second face defined by the layer of polyurethane elastomer which has a minimal thickness - generally less than 2 mm -, increased robustness and great ease of cleaning.

Le fait de prévoir une couche aussi fine de polyuréthanne élastomère est notamment dicté par un souci de disposer d’un panneau de poids minimisé, un tel allègement étant apporté de par la structure alvéolaire de l’âme à base de mousse.The fact of providing such a thin layer of elastomeric polyurethane is dictated in particular by a concern to have a panel of minimized weight, such relief being provided by the alveolar structure of the foam-based core.

Cependant, une âme telle que définie ci-dessus présente généralement des défauts de surface, tels que des cratères.However, a core as defined above generally has surface defects, such as craters.

Et, le fait de surmouler une telle âme par une couche de polyuréthanne élastomère de très faible épaisseur peut conduire à un masquage insuffisant des défauts de surface de ladite âme par ladite couche.And, the fact of overmolding such a core with a layer of very thin polyurethane elastomer can lead to insufficient masking of the surface defects of said core by said layer.

L’invention a pour but de pallier cet inconvénient.The object of the invention is to overcome this drawback.

A cet effet, et selon un premier aspect, l’invention propose un procédé de réalisation d’un panneau d’habillage intérieur de véhicule automobile, ledit procédé comprenant les étapes suivantes :To this end, and according to a first aspect, the invention proposes a method for producing a motor vehicle interior trim panel, said method comprising the following steps:

  • prévoir une âme à base de mousse de polyuréthanne moulée,provide a core based on molded polyurethane foam,
  • prévoir un empilement comprenant un film thermoplastique et une couche fibreuse à base de fibres pourvues d’un agent de liaison thermoplastique,provide a stack comprising a thermoplastic film and a fibrous layer based on fibers provided with a thermoplastic bonding agent,
  • réaliser une compression à chaud dudit empilement, de manière à former un complexe pourvu dudit film et de ladite couche fibreuse thermo-comprimée,perform a hot compression of said stack, so as to form a complex provided with said film and said thermo-compressed fibrous layer,
  • habiller une paroi de cavité de moulage d’un moule avec ledit complexe, ledit film étant tourné vers ladite cavité, ladite cavité étant définie de manière à préserver un espace vacant entre ledit film et la paroi de ladite cavité opposée à celle recevant ladite couche fibreuse, ledit espace présentant une épaisseur généralement inférieure à 2 mm,coating a molding cavity wall of a mold with said complex, said film being turned towards said cavity, said cavity being defined so as to preserve a vacant space between said film and the wall of said cavity opposite to that receiving said fibrous layer , said space having a thickness generally less than 2 mm,
  • remplir ledit espace avec un mélange précurseur de polyuréthanne élastomère non expansé de manière à surmouler ledit complexe,filling said space with an unexpanded elastomeric polyurethane precursor mixture so as to overmold said complex,
  • après réticulation dudit mélange, démouler l’ensemble formant une coque multicouches, ladite coque présentant une couche externe formée par ledit polyuréthanne élastomère, ladite couche externe présentant une épaisseur généralement inférieure à 2 mm,after cross-linking said mixture, unmold the assembly forming a multilayer shell, said shell having an outer layer formed by said elastomeric polyurethane, said outer layer having a thickness generally less than 2 mm,
  • coller ladite coque du côté de ladite couche fibreuse sur une face de ladite âme, de sorte que ledit panneau présente une face en polyuréthanne élastomère.gluing said shell on the side of said fibrous layer to one face of said core, so that said panel has an elastomeric polyurethane face.

Quand on mentionne une épaisseur généralement inférieure à 2 mm, il convient de comprendre qu’une épaisseur plus importante peut être prévue de façon localisée, par exemple au niveau d’un moyen de fixation ou d’un orifice de réception d’une poignée.When a thickness generally less than 2 mm is mentioned, it should be understood that a greater thickness may be provided locally, for example at the level of a fixing means or a receiving hole for a handle.

La présence du film empêche la pénétration de polyuréthanne élastomère dans couche fibreuse.The presence of the film prevents the penetration of elastomeric polyurethane into the fibrous layer.

En outre, le film facilite l’écoulement du polyuréthanne élastomère sur la surface du complexe lors de son surmoulage par la couche de polyuréthanne élastomère.In addition, the film facilitates the flow of the polyurethane elastomer on the surface of the complex during its overmolding by the layer of polyurethane elastomer.

On verra aussi que le film peut permettre la mise en œuvre d’un tirage sous vide pour réaliser un placage du complexe contre la paroi de cavité de moulage concernée lors de l’opération de surmoulage par le polyuréthanne élastomère.It will also be seen that the film can allow the implementation of a vacuum drawing to produce a plating of the complex against the wall of the molding cavity concerned during the overmolding operation with the elastomeric polyurethane.

L’interposition de la couche fibreuse entre l’âme et la couche de polyuréthanne élastomère permet de réaliser un « lissage » de la face correspondante de ladite âme, qui permet de conduire au résultat esthétique escompté.The interposition of the fibrous layer between the core and the elastomeric polyurethane layer makes it possible to “smooth” the corresponding face of said core, which leads to the expected aesthetic result.

Avec l’agencement proposé, on dispose donc d’un panneau pourvu d’une face de robustesse accrue et apte à être aisément nettoyée, ladite face ne laissant en outre pas transparaître les défauts de surface de la face correspondante de l’âme.With the proposed arrangement, there is therefore a panel provided with a face of increased robustness and capable of being easily cleaned, said face also not allowing the surface defects of the corresponding face of the core to show through.

Selon un deuxième aspect, l’invention propose un panneau réalisé par un tel procédé.According to a second aspect, the invention proposes a panel produced by such a process.

D’autres particularités et avantages de l’invention apparaîtront dans la description qui suit, faite en référence à :Other particularities and advantages of the invention will appear in the following description, made with reference to:

qui est une vue schématique en coupe partielle d’un panneau obtenu par un procédé selon une réalisation. which is a partial cross-sectional schematic view of a panel obtained by a method according to one embodiment.

En référence à la figure, on décrit un procédé de réalisation d’un panneau 1 d’habillage intérieur de véhicule automobile – par exemple une tablette de recouvrement d’un compartiment à bagages ou un faux-plancher d’un tel compartiment -, ledit procédé comprenant les étapes suivantes :With reference to the figure, a method for producing a motor vehicle interior trim panel 1 is described - for example a cover shelf for a luggage compartment or a raised floor for such a compartment -, said process comprising the following steps:

  • prévoir une âme 2 à base de mousse de polyuréthanne moulée,provide a core 2 based on molded polyurethane foam,
  • prévoir un empilement comprenant un film 3 thermoplastique et une couche fibreuse 4 à base de fibres pourvues d’un agent de liaison thermoplastique,provide a stack comprising a thermoplastic film 3 and a fibrous layer 4 based on fibers provided with a thermoplastic bonding agent,
  • réaliser une compression à chaud – par exemple par calandrage ou encore au sein d’un conformateur, comme explicité plus loin – dudit empilement, de manière à former un complexe 5 pourvu dudit film et de ladite couche fibreuse thermo-comprimée,perform hot compression – for example by calendering or even within a shaper, as explained below – of said stack, so as to form a complex 5 provided with said film and said thermo-compressed fibrous layer,
  • habiller une paroi de cavité de moulage d’un moule avec ledit complexe, ledit film étant tourné vers ladite cavité, ladite cavité étant définie de manière à préserver un espace vacant entre ledit film et la paroi de ladite cavité opposée à celle recevant ladite couche fibreuse, ledit espace présentant une épaisseur généralement inférieure à 2 mm, notamment sur plus de 90 % de sa surface,coating a molding cavity wall of a mold with said complex, said film being turned towards said cavity, said cavity being defined so as to preserve a vacant space between said film and the wall of said cavity opposite to that receiving said fibrous layer , said space having a thickness generally less than 2 mm, in particular over more than 90% of its surface,
  • remplir ledit espace avec un mélange précurseur de polyuréthanne élastomère non expansé de manière à surmouler ledit complexe,filling said space with an unexpanded elastomeric polyurethane precursor mixture so as to overmold said complex,
  • après réticulation dudit mélange, démouler l’ensemble formant une coque 6 multicouches, ladite coque présentant une couche externe 7 formée par ledit polyuréthanne élastomère, ladite couche externe présentant une épaisseur généralement inférieure à 2 mm, notamment sur plus de 90% de sa surface,after cross-linking said mixture, unmold the assembly forming a multilayer shell 6, said shell having an outer layer 7 formed by said elastomeric polyurethane, said outer layer having a thickness generally less than 2 mm, in particular over more than 90% of its surface,
  • coller – par exemple avec une colle de polyuréthanne de type « hotmelt » – ladite coque du côté de ladite couche fibreuse sur une face de ladite âme, de sorte que ledit panneau présente une face en polyuréthanne élastomère.sticking – for example with a “hotmelt” type polyurethane adhesive – said shell on the side of said fibrous layer on one face of said core, so that said panel has an elastomeric polyurethane face.

On peut prévoir un grainage de la paroi de cavité faisant face à la couche externe 7 afin de conférer à ladite couche un aspect grainé.Graining of the cavity wall facing the outer layer 7 can be provided in order to give said layer a grained appearance.

Selon diverses réalisations, l’âme 2 :According to various realizations, soul 2:

  • peut comprendre au moins une feuille externe, non représentée, de carton surmoulée par le polyuréthanne, une telle feuille permettant de masquer au moins partiellement les défauts de surface de la partie en polyuréthanne,may comprise at least one outer sheet, not shown, of cardboard overmoulded with polyurethane, such a sheet making it possible to at least partially mask the surface defects of the polyurethane part,
  • peut comprendre des fibres de renfort, par exemple de verre,may include reinforcing fibers, for example of glass,
  • peut comprendre, de façon non représentée, un cœur en matériau alvéolaire à motifs répétitifs, notamment sous forme de structure en « nid d'abeille ».may comprise, in a manner not shown, a core of cellular material with repetitive patterns, in particular in the form of a “honeycomb” structure.

Le polyuréthanne constitutif de l’âme 2 est notamment de nature rigide ou semi-rigide, afin que ladite âme présente une certaine rigidité.The constituent polyurethane of the core 2 is in particular of a rigid or semi-rigid nature, so that said core has a certain rigidity.

Selon une réalisation, l’espace vacant présente une épaisseur généralement comprise entre 0,5 et 1 mm – notamment sur plus de 90% de sa surface – une telle épaisseur correspondant par conséquent à celle de la couche externe 7 de polyuréthanne élastomère.According to one embodiment, the vacant space has a thickness generally between 0.5 and 1 mm – in particular over more than 90% of its surface – such a thickness therefore corresponding to that of the outer layer 7 of elastomeric polyurethane.

Selon une réalisation, l’empilement est comprimé à chaud dans un conformateur permettant l’obtention d’un complexe 5 tridimensionnel adapté à la géométrie de la cavité de moulage.According to one embodiment, the stack is hot-compressed in a shaper making it possible to obtain a three-dimensional complex adapted to the geometry of the molding cavity.

En alternative, on peut se contenter d’un simple calandrage à chaud quand on ne souhaite pas pourvoir le complexe 5 d’une géométrie tridimensionnelle.Alternatively, one can be content with simple hot calendering when one does not wish to provide the complex 5 with a three-dimensional geometry.

Selon une réalisation, le moule est pourvu d’un système d’aspiration sous vide permettant un placage du complexe 5 contre la paroi correspondante de la cavité de moulage, ce qui permet de faciliter le remplissage de l’espace vacant par le polyuréthanne élastomère.According to one embodiment, the mold is provided with a vacuum suction system allowing the complex 5 to be placed against the corresponding wall of the molding cavity, which makes it easier to fill the vacant space with the elastomeric polyurethane.

Selon une réalisation, le film 3 est à base de polyuréthanne ou de polyéthylène pourvu d’un traitement de surface – par exemple de type « Corona » – permettant son adhésion à du polyuréthanne.According to one embodiment, the film 3 is based on polyurethane or polyethylene provided with a surface treatment – for example of the “Corona” type – allowing it to adhere to polyurethane.

Selon une réalisation, le film 3 présente une épaisseur comprise entre 20 et 50 microns.According to one embodiment, the film 3 has a thickness of between 20 and 50 microns.

Selon diverses réalisations, l’agent de liaison est à base de polypropylène ou de fibres bi-composant pourvues d’une âme infusible ou fusible à haute température et d’une gaine fusible à moindre température – lesdites fibres étant notamment à base de polyester.According to various embodiments, the bonding agent is based on polypropylene or bi-component fibers provided with a core that is infusible or fusible at high temperature and with a sheath that is fusible at lower temperature – said fibers being in particular polyester-based.

Selon la réalisation représentée, la face du panneau 1 opposée à celle pourvue de la couche externe 7 de polyuréthanne élastomère est revêtue par collage d’une couche de revêtement fibreuse 8.According to the embodiment shown, the face of the panel 1 opposite to that provided with the outer layer 7 of elastomeric polyurethane is coated by gluing with a fibrous coating layer 8.

On décrit enfin un panneau 1 réalisé par un tel procédé, ledit panneau comprenant une âme 2 à base de mousse de polyuréthanne moulée revêtue sur une de ses faces d’une coque 6 rapportée par collage, ladite coque comprenant :Finally, a panel 1 produced by such a process is described, said panel comprising a core 2 based on molded polyurethane foam coated on one of its faces with a shell 6 added by gluing, said shell comprising:

  • une couche fibreuse 4 thermo-comprimée à base de fibres pourvues d’un agent de liaison thermoplastique, ladite couche étant disposée contre ladite face,a thermo-compressed fibrous layer 4 based on fibers provided with a thermoplastic bonding agent, said layer being placed against said face,
  • un film 3 thermoplastique,a thermoplastic film 3,
  • une couche externe 7 formée par du polyuréthanne élastomère non expansé présentant une épaisseur généralement inférieure à 2 mm, notamment sur plus de 90% de sa surface.an outer layer 7 formed by non-expanded elastomeric polyurethane having a thickness generally less than 2 mm, in particular over more than 90% of its surface.

Claims (9)

Procédé de réalisation d’un panneau (1) d’habillage intérieur de véhicule automobile, ledit procédé comprenant les étapes suivantes :
  • prévoir une âme (2) à base de mousse de polyuréthanne moulée,
  • prévoir un empilement comprenant un film (3) thermoplastique et une couche fibreuse (4) à base de fibres pourvues d’un agent de liaison thermoplastique,
  • réaliser une compression à chaud dudit empilement, de manière à former un complexe (5) pourvu dudit film et de ladite couche fibreuse thermo-comprimée,
  • habiller une paroi de cavité de moulage d’un moule avec ledit complexe, ledit film étant tourné vers ladite cavité, ladite cavité étant définie de manière à préserver un espace vacant entre ledit film et la paroi de ladite cavité opposée à celle recevant ladite couche fibreuse, ledit espace présentant une épaisseur généralement inférieure à 2 mm,
  • remplir ledit espace avec un mélange précurseur de polyuréthanne élastomère non expansé de manière à surmouler ledit complexe,
  • après réticulation dudit mélange, démouler l’ensemble formant une coque (6) multicouches, ladite coque présentant une couche externe (7) formée par ledit polyuréthanne élastomère, ladite couche externe présentant une épaisseur généralement inférieure à 2 mm,
  • coller ladite coque du côté de ladite couche fibreuse sur une face de ladite âme, de sorte que ledit panneau présente une face en polyuréthanne élastomère.
Method for producing a motor vehicle interior trim panel (1), said method comprising the following steps:
  • provide a core (2) based on molded polyurethane foam,
  • provide a stack comprising a thermoplastic film (3) and a fibrous layer (4) based on fibers provided with a thermoplastic bonding agent,
  • carry out a hot compression of said stack, so as to form a complex (5) provided with said film and with said thermo-compressed fibrous layer,
  • coating a molding cavity wall of a mold with said complex, said film being turned towards said cavity, said cavity being defined so as to preserve a vacant space between said film and the wall of said cavity opposite to that receiving said fibrous layer , said space having a thickness generally less than 2 mm,
  • filling said space with an unexpanded elastomeric polyurethane precursor mixture so as to overmold said complex,
  • after cross-linking said mixture, demolding the assembly forming a multilayer shell (6), said shell having an outer layer (7) formed by said elastomeric polyurethane, said outer layer having a thickness generally less than 2 mm,
  • gluing said shell on the side of said fibrous layer to one face of said core, so that said panel has an elastomeric polyurethane face.
Procédé selon la revendication 1, caractérisé en ce que l’espace vacant présente une épaisseur généralement comprise entre 0,5 et 1 mm.Method according to claim 1, characterized in that the vacant space has a thickness generally between 0.5 and 1 mm. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que l’empilement est comprimé à chaud dans un conformateur permettant l’obtention d’un complexe (5) tridimensionnel adapté à la géométrie de la cavité de moulage.Method according to one of Claims 1 or 2, characterized in that the stack is hot-pressed in a shaper making it possible to obtain a three-dimensional complex (5) adapted to the geometry of the molding cavity. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le moule est pourvu d’un système d’aspiration sous vide permettant un placage du complexe (5) contre la paroi correspondante de la cavité de moulage.Process according to any one of Claims 1 to 3, characterized in that the mold is provided with a vacuum suction system allowing the complex (5) to be placed against the corresponding wall of the molding cavity. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le film (3) est à base de polyuréthanne ou de polyéthylène pourvu d’un traitement de surface permettant son adhésion à du polyuréthanne.Process according to any one of Claims 1 to 4, characterized in that the film (3) is based on polyurethane or polyethylene provided with a surface treatment allowing it to adhere to polyurethane. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le film (3) présente une épaisseur comprise entre 20 et 50 microns.Method according to any one of Claims 1 to 5, characterized in that the film (3) has a thickness of between 20 and 50 microns. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l’agent de liaison est à base de polypropylène ou de fibres bi-composant pourvues d’une âme infusible ou fusible à haute température et d’une gaine fusible à moindre température.Process according to any one of Claims 1 to 6, characterized in that the bonding agent is based on polypropylene or bi-component fibers provided with an infusible or fusible core at high temperature and with a fusible sheath at lower temperature. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la face du panneau (1) opposée à celle pourvue de la couche externe (7) de polyuréthanne élastomère est revêtue par collage d’une couche de revêtement fibreuse (8).Method according to any one of Claims 1 to 7, characterized in that the face of the panel (1) opposite to that provided with the external layer (7) of elastomeric polyurethane is coated by gluing with a fibrous coating layer (8 ). Panneau (1) réalisé par un procédé selon l'une quelconque des revendications précédentes, ledit panneau comprenant une âme (2) à base de mousse de polyuréthanne moulée revêtue sur une de ses faces d’une coque (6) rapportée par collage, ladite coque comprenant :
  • une couche fibreuse (4) thermo-comprimée à base de fibres pourvues d’un agent de liaison thermoplastique, ladite couche étant disposée contre ladite face,
  • un film (3) thermoplastique,
  • une couche externe (7) formée par du polyuréthanne élastomère non expansé présentant une épaisseur généralement inférieure à 2 mm.
Panel (1) produced by a method according to any one of the preceding claims, said panel comprising a core (2) based on molded polyurethane foam covered on one of its faces with a shell (6) added by gluing, said shell comprising:
  • a thermo-compressed fibrous layer (4) based on fibers provided with a thermoplastic bonding agent, said layer being placed against said face,
  • a thermoplastic film (3),
  • an outer layer (7) formed by non-expanded elastomeric polyurethane having a thickness generally less than 2 mm.
FR1905655A 2019-05-28 2019-05-28 Process for making an interior trim panel for a motor vehicle Pending FR3096608A1 (en)

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FR1905655A FR3096608A1 (en) 2019-05-28 2019-05-28 Process for making an interior trim panel for a motor vehicle

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014210034A1 (en) * 2014-05-26 2015-11-26 Volkswagen Aktiengesellschaft Method for producing a plastic part and a veneering part for a vehicle that can be produced by this method
US20180126924A1 (en) * 2015-05-04 2018-05-10 Howa Tramico Panel for covering and/or soundproofing a wall of a vehicle and associated method of manufacture
FR3070899A1 (en) * 2017-09-12 2019-03-15 Cera Aps INTERIOR TRIM PANEL OF MOTOR VEHICLE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014210034A1 (en) * 2014-05-26 2015-11-26 Volkswagen Aktiengesellschaft Method for producing a plastic part and a veneering part for a vehicle that can be produced by this method
US20180126924A1 (en) * 2015-05-04 2018-05-10 Howa Tramico Panel for covering and/or soundproofing a wall of a vehicle and associated method of manufacture
FR3070899A1 (en) * 2017-09-12 2019-03-15 Cera Aps INTERIOR TRIM PANEL OF MOTOR VEHICLE

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