FR2972977A1 - Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers - Google Patents

Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers Download PDF

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Publication number
FR2972977A1
FR2972977A1 FR1152330A FR1152330A FR2972977A1 FR 2972977 A1 FR2972977 A1 FR 2972977A1 FR 1152330 A FR1152330 A FR 1152330A FR 1152330 A FR1152330 A FR 1152330A FR 2972977 A1 FR2972977 A1 FR 2972977A1
Authority
FR
France
Prior art keywords
panel
cross
foam
core
cross member
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.)
Pending
Application number
FR1152330A
Other languages
French (fr)
Inventor
Eric Brillon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre dEtude et de Recherche pour lAutomobile CERA
Original Assignee
Centre dEtude et de Recherche pour lAutomobile CERA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Centre dEtude et de Recherche pour lAutomobile CERA filed Critical Centre dEtude et de Recherche pour lAutomobile CERA
Priority to FR1152330A priority Critical patent/FR2972977A1/en
Publication of FR2972977A1 publication Critical patent/FR2972977A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1209—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements by impregnating a preformed part, e.g. a porous lining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R5/00—Compartments within vehicle body primarily intended or sufficiently spacious for trunks, suit-cases, or the like
    • B60R5/04—Compartments within vehicle body primarily intended or sufficiently spacious for trunks, suit-cases, or the like arranged at rear of vehicle
    • B60R5/044—Compartments within vehicle body primarily intended or sufficiently spacious for trunks, suit-cases, or the like arranged at rear of vehicle luggage covering means, e.g. parcel shelves

Abstract

The panel (1) has a core (2) containing molded rigid foam. A cross-piece (3) is molded by rigidification of the core, and is embedded in the core. The cross-piece is extended between two opposite sides (4, 5) of the panel, and is made of cellulose fibers, porous foam and cardboard. A cross section of the cross-piece has maximum dimension lower than 20 mm. The cross-piece is presented in a form of a circular section tube, a band folded to form a triangular section, or a corrugated cardboard band. An independent claim is also included for a method for manufacturing a panel.

Description

1 L'invention concerne un panneau de garnissage de véhicule automobile et un procédé de réalisation d'un tel panneau. The invention relates to a motor vehicle trim panel and a method for producing such a panel.

Il est connu de réaliser un panneau de garnissage de véhicule automobile - par exemple une tablette de recouvrement des bagages ou un faux plancher -, ledit panneau comprenant une âme à base de mousse rigide - notamment de polyuréthanne - moulée, ledit panneau comprenant en outre au moins une traverse métallique de rigidification surmoulée par ladite âme et noyée dedans, ladite traverse s'étendant sensiblement entre deux bords opposés dudit panneau. It is known to produce a motor vehicle trim panel - for example a luggage cover tablet or a false floor -, said panel comprising a rigid foam core - in particular molded polyurethane -, said panel further comprising minus a stiffening metal cross member overmolded by said core and embedded therein, said cross member extending substantially between two opposite edges of said panel.

La traverse est surmoulée par la mousse et apporte à l'âme une résistance à la flexion accrue. The crossmember is overmolded by the foam and provides the soul with increased flexural strength.

Cependant, l'utilisation d'une telle traverse métallique est coûteuse et conduit à un surpoids, la traverse présentant une densité beaucoup plus importante que la mousse. However, the use of such a metal cross is expensive and leads to overweight, the cross having a much higher density than the foam.

L'invention a pour but de pallier ces inconvénients. The invention aims to overcome these disadvantages.

A cet effet, et selon un premier aspect, l'invention propose un panneau de garnissage de véhicule automobile, ledit panneau comprenant une âme à base de mousse rigide moulée, ledit panneau comprenant en outre au moins une traverse de rigidification surmoulée par ladite âme et noyée dedans, ladite traverse s'étendant sensiblement entre deux bords opposés dudit panneau, ladite traverse étant à base de fibre de cellulose For this purpose, and according to a first aspect, the invention proposes a motor vehicle trim panel, said panel comprising a molded rigid foam core, said panel further comprising at least one stiffening cross-member overmolded by said core and embedded therein, said cross-member extending substantially between two opposite edges of said panel, said cross-member being based on cellulose fiber

Par une traverse, on entend un élément allongé de section transversale - c'est à dire perpendiculairement à sa longueur - dont la plus grande dimension est très inférieure à la longueur de ladite traverse, par exemple de l'ordre d'un ou plusieurs facteurs 10. 2 Le fait que la traverse est surmoulée par l'âme se manifeste par une adhésion de la mousse de l'âme à la traverse. By a cross member is meant an elongated element of cross-section - that is to say perpendicular to its length - whose largest dimension is much smaller than the length of said cross-member, for example of the order of one or more factors. 10. 2 The fact that the cross is overmolded by the soul is manifested by an adhesion of the foam of the soul to the cross.

L'emploi d'une traverse de matériau à base de fibre de cellulose permet de 5 réaliser un allègement conséquent du panneau et aussi un gain économique. The use of a fiber-based material cross-member makes it possible to achieve a consequent lightening of the panel and also an economic gain.

En dépit du fait qu'un tel matériau - présentant une résistance en flexion bien moindre qu'un métal - soit employé, on obtient un renforcement appréciable de la résistance en flexion du panneau. Ceci s'explique par le surmoulage de la traverse qui crée un « effet composite », de façon analogue à un matériau plastique renforcé par des fibres. Despite the fact that such a material - having a much lower flexural strength than a metal - is employed, appreciable reinforcement of the flexural strength of the panel is achieved. This is explained by the overmolding of the crossbar which creates a "composite effect", similar to a plastic material reinforced by fibers.

En outre, dans le cas d'un matériau à base de fibre de cellulose perméable - au 15 moins partiellement - à la mousse, ladite mousse pénètre ledit matériau en créant une croûte de densité bien supérieure à celle de la mousse, donc de module de flexion amélioré, ledit module étant encore rehaussé par « l'effet composite » réalisé par enrobage des fibres dudit matériau par ladite croûte. In addition, in the case of a material based on cellulose fiber which is permeable at least partially to the foam, said foam penetrates said material by creating a crust with a density much higher than that of the foam, and therefore of improved flexion, said module being further enhanced by the "composite effect" achieved by coating the fibers of said material with said crust.

20 Selon un deuxième aspect, l'invention propose un procédé de réalisation d'un tel panneau. According to a second aspect, the invention proposes a method of producing such a panel.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures jointes dans lesquelles : 25 - la figure 1 est une vue schématique générale en perspective d'un panneau selon une réalisation, - la figure 2 est une vue schématique partielle en coupe d'un panneau selon un mode de réalisation, - la figure 3 est une vue schématique partielle en coupe d'un panneau 30 selon un autre mode de réalisation. Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures in which: FIG. 1 is a general schematic perspective view of a panel according to one embodiment, FIG. is a partial schematic sectional view of a panel according to one embodiment, - Figure 3 is a partial schematic sectional view of a panel 30 according to another embodiment.

En référence aux figures, on décrit un panneau 1 de garnissage de véhicule automobile - par exemple une tablette de recouvrement des bagages ou un 10 3 faux plancher -, ledit panneau comprenant une âme 2 à base de mousse rigide - notamment de polyuréthanne - moulée, ledit panneau comprenant en outre au moins une traverse 3 de rigidification surmoulée par ladite âme et noyée dedans, ladite traverse s'étendant sensiblement entre deux bords 4,5 opposés dudit panneau, ladite traverse étant à base de fibre de cellulose. Referring to the figures, a motor vehicle lining panel 1 - for example a luggage covering tablet or a false floor - is described, said panel comprising a core 2 based on rigid foam - in particular molded polyurethane - said panel further comprising at least one stiffening cross-member 3 overmolded by said core and embedded therein, said cross-member extending substantially between two opposite edges 4,5 of said panel, said cross-member being based on cellulose fiber.

Selon une réalisation, la section transversale - c'est à dire perpendiculairement à la longueur de la traverse 3 - de la traverse 3 présente une dimension maximale inférieure à 30 mm, et notamment inférieure à 20 mm. According to one embodiment, the cross section - that is to say perpendicular to the length of the crossbar 3 - of the crosspiece 3 has a maximum dimension of less than 30 mm, and in particular less than 20 mm.

Selon une réalisation, la traverse 3 est à base de carton. According to one embodiment, the cross member 3 is based on cardboard.

En particulier, comme représenté en figures 2 et 3, la traverse 3 est sous forme de profilé, c'est à dire qu'elle présente une section uniforme. In particular, as shown in Figures 2 and 3, the cross member 3 is in the form of a profile, that is to say that it has a uniform section.

Selon la réalisation de la figure 2, la traverse 3 est sous forme d'un tube de section circulaire, de diamètre notamment compris entre 10 et 20 mm. According to the embodiment of Figure 2, the cross member 3 is in the form of a circular section of the tube diameter in particular between 10 and 20 mm.

Selon la réalisation de la figure 3, la traverse 3 est sous forme d'une bande 20 repliée de façon à présenter une section triangulaire. According to the embodiment of Figure 3, the cross member 3 is in the form of a strip 20 folded so as to have a triangular section.

En variante non représentée, la traverse 3 - ne présentant pas ici une forme de profilé - est sous forme d'un bande de carton ondulé, un tel carton présentant une structure en forme de deux feuilles planes séparées par un écarteur en 25 feuille ondulée qui leur est associé. In a variant which is not shown, the cross member 3 - not having the shape of a profile - is in the form of a corrugated cardboard strip, such a carton having a structure in the form of two flat sheets separated by a corrugated sheet spacer which is associated with them.

Selon une réalisation, le matériau de la traverse 3 est poreux à la mousse, ladite mousse imprégnant au moins partiellement ledit matériau dans son épaisseur. Dans ce cas et comme explicité précédemment, la mousse pénètre le matériau de la traverse 3 en créant une croûte de densité bien supérieure à celle de la mousse, donc de module de flexion amélioré, ledit module étant encore 15 30 4 rehaussé par « l'effet composite » réalisé par enrobage des fibres dudit matériau par ladite croûte. According to one embodiment, the material of the crosspiece 3 is porous to the foam, said foam at least partially impregnating said material in its thickness. In this case and as explained above, the foam penetrates the material of the cross member 3 by creating a crust density much higher than that of the foam, thus improved flexural modulus, said module being further enhanced by "the composite effect "made by coating the fibers of said material with said crust.

Une telle traverse 3, pas nécessairement rigide avant son surmoulage par la mousse de l'âme 2, le devient par imprégnation de ladite mousse dans son épaisseur. Such a cross member 3, not necessarily rigid before its overmolding by the foam of the core 2, becomes it by impregnation of said foam in its thickness.

Bien entendu, l'utilisation d'une traverse 3 telle que décrite dans les différentes réalisations précédentes n'exclut pas l'utilisation de traverses d'une autre 1 o nature, par exemple métallique. Of course, the use of a cross member 3 as described in the various previous embodiments does not exclude the use of sleepers of another nature o, for example metal.

En outre, il peut être prévu de disposer plus d'une traverse 3 à base de fibre de cellulose dans l'âme 2. In addition, it may be provided to have more than one cross member 3 based on cellulose fiber in the core 2.

15 On décrit à présent un procédé de réalisation d'un panneau 1 comprenant les étapes suivantes : - disposer dans un moule une traverse 3 de rigidification à base de fibre de cellulose, - injecter dans ledit moule un mélange précurseur de mousse rigide, 20 - réaliser l'expansion de la mousse dans la cavité de moulage définie par le moule, de manière à surmouler ladite traverse et à la noyer dans la mousse, - démouler le panneau 1 obtenu. A process for producing a panel 1 comprising the following steps is now described: - placing in a mold a stiffening cross-member 3 made of cellulose fiber, - injecting into said mold a precursor mixture of rigid foam, 20 - carry out the expansion of the foam in the molding cavity defined by the mold, so as to overmold said cross and walnut in the foam, - demolding the panel 1 obtained.

25 Le procédé peut comprendre en outre l'étape de revêtir au moins une partie de la cavité de moulage d'une feuille de revêtement, de manière à obtenir un panneau 1 pourvu d'un revêtement surmoulé par la mousse. The method may further comprise the step of coating at least a portion of the molding cavity with a coating sheet to obtain a panel 1 provided with a foam overmolded coating.

Claims (10)

REVENDICATIONS1. Panneau (1) de garnissage de véhicule automobile, ledit panneau comprenant une âme (2) à base de mousse rigide moulée, ledit panneau comprenant en outre au moins une traverse (3) de rigidification surmoulée par ladite âme et noyée dedans, ladite traverse s'étendant sensiblement entre deux bords (4,5) opposés dudit panneau, ledit panneau étant caractérisé en ce que ladite traverse est à base de fibre de cellulose. REVENDICATIONS1. Panel (1) for lining a motor vehicle, said panel comprising a core (2) based on rigid molded foam, said panel further comprising at least one stiffening cross-member (3) overmolded by said core and embedded therein, said cross-member extending substantially between two opposite edges (4,5) of said panel, said panel being characterized in that said cross member is based on cellulose fiber. 2. Panneau selon la revendication 1, caractérisé en ce que la section transversale de la traverse (3) présente une dimension maximale inférieure à 30 mm, et notamment inférieure à 20 mm. 2. Panel according to claim 1, characterized in that the cross section of the crossbar (3) has a maximum dimension of less than 30 mm, and in particular less than 20 mm. 3. Panneau selon la revendication 1 ou 2, caractérisé en ce que la traverse (3) est à base de carton. 3. Panel according to claim 1 or 2, characterized in that the cross member (3) is based on cardboard. 4. Panneau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la traverse (3) est sous forme de profilé. 4. Panel according to any one of claims 1 to 3, characterized in that the cross member (3) is in the form of profile. 5. Panneau selon la revendication 4, caractérisé en ce que la traverse (3) est sous forme d'un tube de section circulaire. 5. Panel according to claim 4, characterized in that the cross member (3) is in the form of a circular section tube. 6. Panneau selon la revendication 4, caractérisé en ce que la traverse (3) est sous forme d'une bande repliée de façon à présenter une section triangulaire. 6. Panel according to claim 4, characterized in that the cross member (3) is in the form of a band folded so as to have a triangular section. 7. Panneau selon la revendication 3, caractérisé en ce que la traverse (3) est sous forme d'une bande de carton ondulé. 7. Panel according to claim 3, characterized in that the cross member (3) is in the form of a strip of corrugated cardboard. 8. Panneau selon l'une quelconque des revendications 1 à 7, caractérisé en 30 ce que le matériau de la traverse (3) est poreux à la mousse, ladite mousse imprégnant au moins partiellement ledit matériau dans son épaisseur.25 6 8. Panel according to any one of claims 1 to 7, characterized in that the material of the crossbar (3) is porous to the foam, said foam impregnating at least partially said material in its thickness. 9. Procédé de réalisation d'un panneau (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comprend les étapes suivantes : - disposer dans un moule une traverse (3) de rigidification à base de fibre de cellulose, - injecter dans ledit moule un mélange précurseur de mousse rigide, - réaliser l'expansion de la mousse dans la cavité de moulage définie par le moule, de manière à surmouler ladite traverse et à la noyer dans la mousse, - démouler le panneau (1) obtenu. 9. A method of producing a panel (1) according to any one of claims 1 to 8, characterized in that it comprises the following steps: - arrange in a mold a crossbar (3) stiffening fiber-based of cellulose, - injecting into said mold a precursor mixture of rigid foam, - expanding the foam in the molding cavity defined by the mold, so as to overmold said cross and walnut in the foam, - unmold the panel (1) obtained. 10. Procédé selon la revendication 9, caractérisé en ce qu'il comprend en outre l'étape de revêtir au moins une partie de la cavité de moulage d'une feuille de revêtement, de manière à obtenir un panneau (1) pourvu d'un revêtement surmoulé par la mousse.15 10. The method of claim 9, characterized in that it further comprises the step of coating at least a portion of the molding cavity with a coating sheet, so as to obtain a panel (1) provided with a coating overmolded by the foam.
FR1152330A 2011-03-21 2011-03-21 Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers Pending FR2972977A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1152330A FR2972977A1 (en) 2011-03-21 2011-03-21 Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1152330A FR2972977A1 (en) 2011-03-21 2011-03-21 Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers

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FR2972977A1 true FR2972977A1 (en) 2012-09-28

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FR1152330A Pending FR2972977A1 (en) 2011-03-21 2011-03-21 Panel for lining e.g. luggage covering shelf of motor vehicle i.e. car, has cross-piece molded by rigidification of core, extended between two opposite sides of panel and made of cellulose fibers

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3058372A1 (en) * 2016-11-04 2018-05-11 Cera Aps INTERIOR TRIM PANEL OF MOTOR VEHICLE

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2239571A1 (en) * 1973-08-03 1975-02-28 Apollo Plastics Modular building panel system - having foam, pref. polyurethane, cores with internal columns of cast concrete
FR2820073A1 (en) * 2001-01-30 2002-08-02 Cera Manufacture of plastic panel with cellular core e.g. for vehicle rear parcel shelf uses prefabricated core molded into plastic foam matrix
EP1792784A1 (en) * 2005-11-30 2007-06-06 Centre d'etude et de recherche pour l'automobile (CERA) Double shell pannel with integrated cavities for vehicle and manufacturing process thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2239571A1 (en) * 1973-08-03 1975-02-28 Apollo Plastics Modular building panel system - having foam, pref. polyurethane, cores with internal columns of cast concrete
FR2820073A1 (en) * 2001-01-30 2002-08-02 Cera Manufacture of plastic panel with cellular core e.g. for vehicle rear parcel shelf uses prefabricated core molded into plastic foam matrix
EP1792784A1 (en) * 2005-11-30 2007-06-06 Centre d'etude et de recherche pour l'automobile (CERA) Double shell pannel with integrated cavities for vehicle and manufacturing process thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3058372A1 (en) * 2016-11-04 2018-05-11 Cera Aps INTERIOR TRIM PANEL OF MOTOR VEHICLE

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