WO2007033965A2 - Motor vehicle part provided with a honeycomb core and a skin - Google Patents
Motor vehicle part provided with a honeycomb core and a skin Download PDFInfo
- Publication number
- WO2007033965A2 WO2007033965A2 PCT/EP2006/066512 EP2006066512W WO2007033965A2 WO 2007033965 A2 WO2007033965 A2 WO 2007033965A2 EP 2006066512 W EP2006066512 W EP 2006066512W WO 2007033965 A2 WO2007033965 A2 WO 2007033965A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- skin
- foam
- core
- layer
- thermoplastic material
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
- E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
-
- 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
-
- 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
- B32B2605/08—Cars
Definitions
- Motor vehicle part comprising an alveolar core and a skin
- the invention relates to parts especially for vehicles such as motor vehicles
- EP-0 794 051 is known in the name of the Applicant from composite parts formed of thermo-compressed sandwich material.
- the stack comprises a honeycomb core and two skins arranged on either side of the ream Can add an appearance coating
- Such parts have the disadvantage of risk of lack of tightness Indeed they are woven or not, His skin may have porosities that! This problem occurs especially in areas with a small radius of curvature resulting for example from a molding operation or stamping operation. Indeed, such operations stretch the skins, thus removing their fibers or tearing their material It has been attempted to remedy this problem by tarring the parts mainly at the most exposed places
- tarring is an additional operation in the manufacture of parts
- the tar applied is heavy, relatively expensive and the application operation is difficult to drive. It is therefore an expensive and potentially inefficient solution.
- An object of the invention is to improve the tightness of sandwich structure parts by means of a simple operation effective and inexpensive to drive
- a particular piece for vehicle comprising
- an alveolar core comprising a thermoplastic material
- At least one skin comprising a thermoplast material, the part comprising, in addition, at least one layer of closed-cell thermoplastic foam, interposed between the core and the skin;
- the closed-cell foam layer limits water absorption and ensures sealing of the workpiece. If necessary, the foam clogs any pores or micro-openings in the skin of the sandwich and in fact Thus, moreover, surprisingly, the foam makes it possible to solve the sealing problem without degrading the rigidity properties of the sandwich.
- the foam can be put into place in a stack before the oven is placed in the oven. its molding The temperature of the oven can easily be adjusted to heat the layers of the sandwich including the foam homogeneously without degrading any of its layers and while ensuring the connection between them
- EP 0628406 and WO92 / 12855 disclose parts formed by stacks. However, none of these two documents teach to provide a sealing function using a closed cell foam layer. According to EP 0628406 the foam layer aims to partially fill a honeycomb core and according to WO92 / 12855 the cell layer is open cell and permeable
- the core has a honeycomb structure, the skin being a first skin, the part comprises a second skin covering one face of the soul opposite to the first skin,
- the foam layer being a first layer of foam
- the part comprises a second layer of foam interposed between the core and the second skin
- the piece comprises a coating covering one face of the skin or one of the skins opposite the soul.
- a method for manufacturing a part in particular for a vehicle in which a stack comprising a cellular core comprising a thermoplastic material is constituted,
- thermoplaetic material at least one skin comprising a thermoplaetic material
- the method of the invention may also have at least one of the following features •
- the foam is placed in the form of a sheet
- the stack comprising the foam layer is heated
- FIG. 2 is a sectional view of the part of FIG. 1, and FIG. 3 is a view similar to FIG. 2 showing the structure of the part in an exploded manner.
- FIGS. 1 to 3 A preferred embodiment of a part according to the invention has been illustrated in FIGS. 1 to 3
- Part 2 comprises in this case a core 4, two skins 6, 8, a layer of foam 10 and a coating 12
- the core 4 is formed in the present example by a honeycomb structure of round or hexagonal open cell abilites, which are visible in perspective in FIG. 1.
- the core 4 consists of a thermoplastic material, preferably polypropylene.
- foam layer 4 covers one of the main faces 14, 16 of the core 4 and in this case its underside 14
- the foam is made of thermoplastic material and preferably in the same material as the core 4, namely polypropylene It is for example the material marketed under the name XPP by the company FAGERDALA WORLD FOAMS
- the skins 6 and 8 are formed of thermoplastic material, preferably reinforced with glass fibers.
- the plastic material is again polypropylene in the present example.
- the skin ⁇ covers the upper face 16 of the core 4 while the skin 8 covers the underside of the foam layer 10
- the lower skin 8 is a skin ex dull forming the underside of (a piece
- the coating 12 is in the form of carpet, but it may be more generally a woven or non-woven coating, synthetic or not This coating constitutes the upper face of the piece
- the coating 12 covers the upper face of the skin 6
- the different layers 12, 6, 4, 10 and 8 succeed each other from top to bottom in this order in the room, each layer being in contact surface with the two adjacent layers
- the foam in particular is therefore directly in contact with a face of the core 4 and a face of the lower skin 8
- each of the skins 6, 8 has a thickness of 0.7 mm
- the foam film has a thickness of 2.2 mm
- the core 4 has a thickness between 5 and 30 mm. It may be noted that in the present invention I
- the part 2 is made as follows in the context of this embodiment of the method of the invention
- the foam 10 may be an extruded or expanded foam
- This stack is then placed in an oven in order to heat it to a suitable temperature depending on the nature of the material or materials used in the layers of the stack.
- the heated stack is placed in a forming mold where it will be compressed and shaped.
- This operation allows the different layers of the stack to be bonded together by welding and furthermore gives the part its general shape, often not Indeed, without the need to provide a layer of adhesive / f, the foam layer 10 is welded under the effect of the pressure and temperature to the core 4 in nest d ! bees and skins 6, 8 (preferably polypropylene)
- the foam 10 presented here has a sufficient thermal resistance not to degrade during the heating operation It is welded to the core 4 in honeycombs and to the skin 8 contiguous with a peel force sufficient to not degrade the performance of the sandwich This foam also has sufficient elongation not to tear during the forming of the piece
- the species according to the invention may constitute, for example, a vehicle boot floor or a rear shelf.
- thermoplastic material presented above may be replaced by any other thermoplastic material, whether or not loaded with glass fibers. It will be, for example, polyamide or polyethylene. The skin 6 and / or the coating may be removed. 12
- An additional foam layer 18, shown in FIG. 3 in dotted lines, could be provided interposed between the skin 6 and the face 16 of the core 4.
- the density of the exfruded expanded polypropylene closed cell foam layer has a density greater than 45 kg / m 3 preferably of the order of 55 kg / m 3. (for a typical thickness of the order of 2.2mm)
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Pièce de véhicule automobile comprenant une âme alvéolaire et une peau Motor vehicle part comprising an alveolar core and a skin
L'invention concerne les pièces notamment pour véhicules tels que les véhicules automobilesThe invention relates to parts especially for vehicles such as motor vehicles
On connaît par exemple du document EP-O 794 051 au nom de la demanderesse des pièces composites formées en matériau sandwich thermo-compressé Dans une telle pièce, l'empilement comprend une âme alvéolaire et deux peaux disposées de part et d'autre de rame Peut s'y ajouter un revêtement d'aspectFor example, EP-0 794 051 is known in the name of the Applicant from composite parts formed of thermo-compressed sandwich material. In such a part, the stack comprises a honeycomb core and two skins arranged on either side of the ream Can add an appearance coating
De telles pièces ont pour inconvénient de risquer de manquer d'étanchéité En effet qu'elles soient tissées ou non, Ses peaux peuvent présenter des porosités qu! laissent passer l'eau au travers du sandwich une fois formé Ce problème se présente notamment dans !es zones a faible rayon de courbure résultant par exemple d'une opération de moulage ou d'emboutissage En effet de telles opérations étirent les peaux, écartant ainsi leurs fibres ou déchirant leur matπce On a tenté de remédier à ce problème en procédant au goudronnage des pièces principalement aux endroits les plus exposés Toutefois, le goudronnage constitue une opération supplémentaire dans la fabrication des pièces De plus, le goudron appliqué est lourd, relativement onéreux et l'opération d'application est délicate à conduire II s'agit donc d'une solution chère et pouvant manquer d efficacitéSuch parts have the disadvantage of risk of lack of tightness Indeed they are woven or not, His skin may have porosities that! This problem occurs especially in areas with a small radius of curvature resulting for example from a molding operation or stamping operation. Indeed, such operations stretch the skins, thus removing their fibers or tearing their material It has been attempted to remedy this problem by tarring the parts mainly at the most exposed places However, tarring is an additional operation in the manufacture of parts In addition, the tar applied is heavy, relatively expensive and the application operation is difficult to drive. It is therefore an expensive and potentially inefficient solution.
On a également proposé d'ajouter a ! empilement un film en matière plastique dense et ce préalablement a la compression de I empilement Toutefois un tel film pose des probiemes de mise en œuvreIt was also proposed to add a! stacking a dense plastic film and this prior to the compression of the stack However, such a film poses problems of implementation
En effet si on le met en place dans l'empilement entre la peau et l'âme avant le passage au four, i! constitue une barrière thermique qui empêche fa fusion a i interface entre I âme et la peau si le chauffage est insuffisant, ce qui nuit à la cohésion du sandwich Si i on chauffe davantage, le film se trouve détruit Si on positionne le film dans l'empilement à I extérieur du sandwich sur l'une des peaux avant (e passage au four, (e film est également détruit si le chauffage est trop fort tandis qu'il est difficile d'obtenir une bonne cohésion entre le fiim et la peau si le chauffage est moins fort A l'inveise, si on installe le film après le passage au four de l'empilement et préalablement a la compression du sandwich, cette installation constitue une opération supplémentaire et délicate lors de la fabncation Elle ne conduit pas en outre a une très bonne cohésion entre le film en matière plastique et la peau Ce manque de cohésion empêche l'habillage de la surface du sandwich et son utilisation pour le collage de la pièce par exempleIndeed if it is put in place in the stack between the skin and the soul before the oven, i! is a thermal barrier that prevents fusion at the interface between the core and the skin if the heating is insufficient, which is detrimental to the cohesion of the sandwich. If heated further, the film is destroyed. If the film is positioned in the stack outside the sandwich on one of the skins before it is oven-dried, the film is also destroyed if the heating is too strong while it is difficult to obtain a good one. cohesion between the fiim and the skin if the heating is less strong At the inveise, if one installs the film after the passage in the oven of the stack and prior to the compression of the sandwich, this installation is an additional and delicate operation during It also does not lead to a very good cohesion between the plastic film and the skin This lack of cohesion prevents the dressing of the surface of the sandwich and its use for bonding the piece for example
Un but de l'invention est d'améliorer l'étancheité des pièces a structure sandwich au moyen d'un opération simple efficace et peu onéreuse à conduire A cet effet, on prévoit selon l'invention une pièce notamment pour véhicule, comprenantAn object of the invention is to improve the tightness of sandwich structure parts by means of a simple operation effective and inexpensive to drive For this purpose, it provides according to the invention a particular piece for vehicle, comprising
- une âme alvéolaire comprenant un matériau thermoplastique etan alveolar core comprising a thermoplastic material and
- au moins une peau comprenant un matériau thermoplast,que, la pièce comprenant en outre au moins une couche de mousse en matériau thermoplastique à cellules fermées, interposée entre l'âme et la peauat least one skin comprising a thermoplast material, the part comprising, in addition, at least one layer of closed-cell thermoplastic foam, interposed between the core and the skin;
Ainsi, lorsque la pièce est formée, la couche de mousse a cellules fermées limite l'absorption d'eau et assure Fétanchéite de la pièce Le cas échéant, la mousse bouche les porosités ou micro-ouvertures éventuelles de la peau du sandwich et en fait ainsi un matériau étanche De plus, de manière surprenante, la mousse permet de résoudre le problème d'étanchéite sans dégrader les propriétés de rigidité du sandwich La mousse peut être mise en place dans 1 empilement avant le passage au four de l'empilement préalable a son moulage La température du four peut sans difficulté être ajustée pour chauffer les couches du sandwich y compris la mousse de manière homogène sans dégrader aucune de ses couches et tout en assurant la liaison entre elles Les documents EP 0628406 et WO92/12855 divulguent des pièces formées par des empilements Cependant, aucun de ces deux documents n'enseignent d'assurer une fonction d'étanchéité à l'aide d'une couche de mousse à cellules fermées. Selon EP 0628406 la couche de mousse a pour objectif de remplir partiellement une âme en nid d'abeilles et selon WO92/12855 la couche cellulaire est à cellules ouvertes et perméableThus, when the workpiece is formed, the closed-cell foam layer limits water absorption and ensures sealing of the workpiece. If necessary, the foam clogs any pores or micro-openings in the skin of the sandwich and in fact Thus, moreover, surprisingly, the foam makes it possible to solve the sealing problem without degrading the rigidity properties of the sandwich. The foam can be put into place in a stack before the oven is placed in the oven. its molding The temperature of the oven can easily be adjusted to heat the layers of the sandwich including the foam homogeneously without degrading any of its layers and while ensuring the connection between them EP 0628406 and WO92 / 12855 disclose parts formed by stacks. However, none of these two documents teach to provide a sealing function using a closed cell foam layer. According to EP 0628406 the foam layer aims to partially fill a honeycomb core and according to WO92 / 12855 the cell layer is open cell and permeable
La pièce selon l'invention pourra présenter en outre au moins l'une quelconque des caractéristiques sufvantesThe part according to the invention may also have at least one of the following sufvantes characteristics
- l'âme a une structure en nids d'abeilles , - la peau étant une première peau, la pièce comprend une deuxième peau recouvrant une face de l'âme opposée à la première peau ,the core has a honeycomb structure, the skin being a first skin, the part comprises a second skin covering one face of the soul opposite to the first skin,
- !a couche de mousse étant une première couche de mousse la pièce comprend une deuxième couche de mousse interposée entre l'âme et la deuxième peau ; et - la pièce comprend un revêtement recouvrant une face de la peau ou de l'une des peaux opposée à l'âme.the foam layer being a first layer of foam, the part comprises a second layer of foam interposed between the core and the second skin; and the piece comprises a coating covering one face of the skin or one of the skins opposite the soul.
On prévoit également selon l'invention un procédé de fabrication d'une pièce, notamment pour véhicule dans lequel on constitue un empilement comprenant - une âme alvéolaire comprenant un matériau thermoplastique ,According to the invention there is also provided a method for manufacturing a part, in particular for a vehicle in which a stack comprising a cellular core comprising a thermoplastic material is constituted,
- au moins une peau comprenant un matériau thermoplaεtique etat least one skin comprising a thermoplaetic material and
- au moins une couche de mousse en matériau thermopiastsque à cellules fermées, interposée entre ! âme et la peauat least one layer of closed-cell thermopiastsque material foam interposed between soul and skin
Le procédé selon l'invention pourra présenter en outre au moins l'une quelconque des caractéristiques suivantes • The method of the invention may also have at least one of the following features •
- on dispose la mousse sous la forme d'une feuille ,the foam is placed in the form of a sheet,
- on chauffe l'empilement comprenant la couche de mousse , etthe stack comprising the foam layer is heated, and
- on met en forme l'empilement dans un moufe- the stack is shaped in a mold
D'autres caractéristiques et avantages de l'invention apparaîtront encore dans la description suivante d'un mode préféré de réalisation donné à titre d'exemple non limitatif en référence aux dessins annexés sur lesquels - Sa figure 1 est une vue en perspective avec arrachement partiel d'une pièce selon un mode préféré de réaîisation de ! invention avant mise en forme de la pièce ,Other features and advantages of the invention will become apparent in the following description of a preferred embodiment given by way of non-limiting example with reference to the accompanying drawings in which: - Figure 1 is a perspective view with partial cutaway of a part according to a preferred embodiment of! invention before forming the part,
- la figure 2 est une vue en coupe de \a pièce de la figure 1 , et - la figure 3 est une vue analogue à îa f/gure 2 montrant la structure de la pièce de façon éclatéeFIG. 2 is a sectional view of the part of FIG. 1, and FIG. 3 is a view similar to FIG. 2 showing the structure of the part in an exploded manner.
Un mode préféré de réalisation d'une pièce selon l'invention a été illustré aux figures 1 à 3A preferred embodiment of a part according to the invention has been illustrated in FIGS. 1 to 3
La pièce 2 comprend en l'espèce une âme 4, deux peaux 6, 8, une couche de mousse 10 et un revêtement 12Part 2 comprises in this case a core 4, two skins 6, 8, a layer of foam 10 and a coating 12
L'âme 4 est formée dans le présent exemple par une structure en nids d'abeilîes à cellules ouvertes rondes ou hexagonales, qui sont visibles en perspective sur la figure 1 L'âme 4 est constituée en un matériau thermopjastique, de préférence en polypropylène La couche de mousse 4 recouvre Tune des faces principales 14, 16 de l'âme 4 et en l'espèce sa face inférieure 14 La mousse est constituée en matériau thermoplastique et de préférence dans le même matériau que l'âme 4, à savoir en polypropylène II s'agit par exemple du matériau commercialisé sous la dénomination XPP par ia société FAGERDALA WORLD FOAMS Les peaux 6 et 8 sont formées en matériau thermoplastique, de préférence renforcé par des fibres de verre La matière plastique est dans le présent exemple à nouveau du polypropylène La peau β recouvre la face supérieure 16 de l'âme 4 tandis que la peau 8 recouvre lε face inférieure de la couche de mousse 10 La peau inférieure 8 est une peau externe formant la face inférieure de (a pièceThe core 4 is formed in the present example by a honeycomb structure of round or hexagonal open cell abilites, which are visible in perspective in FIG. 1. The core 4 consists of a thermoplastic material, preferably polypropylene. foam layer 4 covers one of the main faces 14, 16 of the core 4 and in this case its underside 14 The foam is made of thermoplastic material and preferably in the same material as the core 4, namely polypropylene It is for example the material marketed under the name XPP by the company FAGERDALA WORLD FOAMS The skins 6 and 8 are formed of thermoplastic material, preferably reinforced with glass fibers. The plastic material is again polypropylene in the present example. The skin β covers the upper face 16 of the core 4 while the skin 8 covers the underside of the foam layer 10 The lower skin 8 is a skin ex dull forming the underside of (a piece
Le revêtement 12 est en I espèce constitué par une moquette mais il pourra s'agir plus généralement d'un revêtement tissé ou non tissé, synthétique ou non Ce revêtement constitue Ia face supérieure de la pièce Le revêtement 12 recouvre Ia face supérieure de la peau 6 Les différentes couches 12, 6, 4, 10 et 8 se succèdent donc de haut en bas dans cet ordre dans la pièce, chaque couche étant en contact surfacique avec les deux couches adjacentes La mousse en particulier est donc directement en contact avec une face de l'âme 4 et une face de la peau inférieure 8The coating 12 is in the form of carpet, but it may be more generally a woven or non-woven coating, synthetic or not This coating constitutes the upper face of the piece The coating 12 covers the upper face of the skin 6 The different layers 12, 6, 4, 10 and 8 succeed each other from top to bottom in this order in the room, each layer being in contact surface with the two adjacent layers The foam in particular is therefore directly in contact with a face of the core 4 and a face of the lower skin 8
Dans le présent exemple, chacune des peaux 6, 8 a une épaisseur de 0,7 mm, le film 10 en mousse a une épaisseur de 2,2 mrn et l'âme 4 a une épaisseur comprise entre 5 et 30 mm Naturellement, ces grandeurs pourraient être modifiées On remarque que dans la présente mvention I âmeIn the present example, each of the skins 6, 8 has a thickness of 0.7 mm, the foam film has a thickness of 2.2 mm and the core 4 has a thickness between 5 and 30 mm. It may be noted that in the present invention I
4 a une épaisseur très supérieure à chacune des autres couches de l'empilement Cette épaisseur est atnsi supérieure à deux fois, voire supérieure à dix fois l'épaisseur de chacune des autres couches4 has a thickness much greater than each of the other layers of the stack This thickness is atnsi greater than twice, or even greater than ten times the thickness of each of the other layers
La pièce 2 est réalisée de la façon suivante dans le cadre du présent mode de mise en œuvre du procédé de l'inventionThe part 2 is made as follows in the context of this embodiment of the method of the invention
On constitue l'empilement des couches qui viennent d'être énoncées pour former Se sandwich Lors de la constitution de l'empilement, on dispose la couche de mousse 10 sous la forme d'un film ou d'une feuιlle préconstitué entre les couches 4 et 8 La mousse 10 pourra être une mousse extrudée ou expanséeIt is the stack of layers which have just been set out to form sandwich If Upon incorporation of the stack, there is the foam layer 10 in the form of a film or f euιlle preconstituted between layers 4 and 8 The foam 10 may be an extruded or expanded foam
On dispose ensuite cet empilement dans un four afin de le chauffer à une température adaptée dépendant de la nature du ou des matériaux employés dans les couches de l'empilementThis stack is then placed in an oven in order to heat it to a suitable temperature depending on the nature of the material or materials used in the layers of the stack.
Ensuite, on dispose l'empilement chauffé dans un moule de formage où il sera compressé et mis en forme Cette opération permet de fixer entre elles par soudage les différentes couches de l'empilement et en outre confère à la pièce sa forme générale, souvent non plane En effet, sans qu'il soit nécessaire de prévoir une couche d'adhés/f, la couche de mousse 10 se soude sous i'effet de la pression et de la température à l'âme 4 en nid d!abeιiles et aux peaux 6, 8 (de préférence en polypropylène)Then, the heated stack is placed in a forming mold where it will be compressed and shaped. This operation allows the different layers of the stack to be bonded together by welding and furthermore gives the part its general shape, often not Indeed, without the need to provide a layer of adhesive / f, the foam layer 10 is welded under the effect of the pressure and temperature to the core 4 in nest d ! bees and skins 6, 8 (preferably polypropylene)
La même opération peut mettre en œuvre une découpe de certains bords de la pièce comme cela est présenté dans le document EP-O 794 051 précité En outre, de même que décrit dans ce document, un écrasement local du sandwich y compris de l'âme 4, peut avoir lieu au cours de cette opérationThe same operation can implement a cutting of certain edges of the part as is presented in the document EP-O 794 051 mentioned above, as described in this document, a crash local sandwich including the soul 4, can take place during this operation
La mousse 10 présentée ici a une résistance thermique suffisante pour ne pas se dégrader lors de l'opération de chauffage Elle se soude a l'âme 4 en nids d'abeilles et à la peau 8 contigues avec un effort de pelage suffisant pour ne pas dégrader les performances du sandwich Cette mousse a également un allongement suffisant pour ne pas se déchirer lors du formage de Ja pièceThe foam 10 presented here has a sufficient thermal resistance not to degrade during the heating operation It is welded to the core 4 in honeycombs and to the skin 8 contiguous with a peel force sufficient to not degrade the performance of the sandwich This foam also has sufficient elongation not to tear during the forming of the piece
On obtiendra de bons résultats lors de la mise en œuvre de l'invention si les différentes couches comprenant un matériau synthétique comprennent le même matériau thermopïastiqueGood results will be obtained during the implementation of the invention if the various layers comprising a synthetic material comprise the same thermopastic material
La psèce selon l'invention pourra constituer par exemple un plancher de coffre de véhicule ou encore une tablette arrièreThe species according to the invention may constitute, for example, a vehicle boot floor or a rear shelf.
Bien entendu, on pourra apporter à l'invention de nombreuses modifications sans sortir du cadre de ceϋe-ciOf course, we can bring to the invention many changes without departing from the scope of this one
On pourra rempfacer fe polypropyfène présenté ci-dessus à titre de matière thermoplastique par tout autre matière thermoplastique, chargée ou non par des fibres de verre II s'agira par exemple de polyamide ou de polyéthylène On pourra supprimer la peau 6 et/ou le revêtement 12The thermoplastic material presented above may be replaced by any other thermoplastic material, whether or not loaded with glass fibers. It will be, for example, polyamide or polyethylene. The skin 6 and / or the coating may be removed. 12
On pourra disposer !a couche de mousse 10 du même côté de l'âme 4 que le revêtement 12It will be possible to have the foam layer 10 on the same side of the core 4 as the coating 12
On pourrait prévoir une couche de mousse supplémentaire 18, illustrée à la figure 3 en traits pointillés, interposée entre la peau 6 et la face 16 de l'âme 4An additional foam layer 18, shown in FIG. 3 in dotted lines, could be provided interposed between the skin 6 and the face 16 of the core 4.
La Demanderesse a par ailleurs déterminé que de préférence, pour assurer une étanchéité satisfaisante, la densité de la couche de mousse 10 à cellules fermées en polypropyiène expansé exfrude a une densité supérieure à 45kg/m3 préférentiellement de l'ordre de 55kg/m3 (pour une épaisseur typique de l'ordre de 2,2mm) The Applicant has furthermore determined that, in order to ensure a satisfactory seal, the density of the exfruded expanded polypropylene closed cell foam layer has a density greater than 45 kg / m 3 preferably of the order of 55 kg / m 3. (for a typical thickness of the order of 2.2mm)
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0509559 | 2005-09-19 | ||
| FR0509559A FR2890893A1 (en) | 2005-09-19 | 2005-09-19 | MOTOR VEHICLE PART COMPRISING AN ALVEOLAR SOUL AND A SKIN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007033965A2 true WO2007033965A2 (en) | 2007-03-29 |
| WO2007033965A3 WO2007033965A3 (en) | 2007-07-26 |
Family
ID=36143605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/066512 Ceased WO2007033965A2 (en) | 2005-09-19 | 2006-09-19 | Motor vehicle part provided with a honeycomb core and a skin |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2890893A1 (en) |
| WO (1) | WO2007033965A2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008011018U1 (en) * | 2008-08-18 | 2008-10-30 | Holzapfel, Christoph | Shelf for containers |
| AT509326B1 (en) * | 2010-05-17 | 2011-08-15 | Greiner Purtec Gmbh | SUPPORT GROUP FOR PASSENGER SEAT AND PASSENGER SEAT |
| AT515748B1 (en) * | 2014-04-24 | 2017-09-15 | Stia - Holzindustrie Ges M B H | Building board, in particular wall or ceiling panel |
| ES2978091T3 (en) | 2014-06-04 | 2024-09-05 | Bright Lite Structures Llc | Multicomponent polymeric resin, methods for applying the same and composite laminated structure including the same base |
| EP3277868B1 (en) | 2015-04-03 | 2021-11-24 | Bright Lite Structures LLC | Apparatus for controllably cutting fibers and related methods |
| JP7208390B2 (en) | 2018-11-19 | 2023-01-18 | ブライト ライト ストラクチャーズ エルエルシー | High-strength composite with low heat release |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8817669D0 (en) * | 1988-07-25 | 1988-09-01 | Short Brothers Ltd | Means for attenuating sound energy |
| GB9101355D0 (en) * | 1991-01-22 | 1991-03-06 | Short Brothers Plc | Noise attentuation panel |
| US5494737A (en) * | 1992-12-28 | 1996-02-27 | Mitsui Toatsu Chemicals, Inc. | Ceiling material for vehicles and production process thereof |
| TW274068B (en) * | 1993-05-13 | 1996-04-11 | Ciba Geigy Ag |
-
2005
- 2005-09-19 FR FR0509559A patent/FR2890893A1/en active Pending
-
2006
- 2006-09-19 WO PCT/EP2006/066512 patent/WO2007033965A2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR2890893A1 (en) | 2007-03-23 |
| WO2007033965A3 (en) | 2007-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0649736B1 (en) | Motor vehicle back shelf and method for its manufacture | |
| FR3036647A1 (en) | COMPOSITE MATERIAL FOR THE MANUFACTURE OF A REINFORCING ELEMENT FOR LIGHTWEIGHT CONSTRUCTION, PROCESS FOR MANUFACTURING THE SAME, AND METHOD FOR PRODUCING THE SAME | |
| EP1144223B1 (en) | Interior covering element for a vehicle and method for producing the same | |
| WO2007033965A2 (en) | Motor vehicle part provided with a honeycomb core and a skin | |
| FR2627127A1 (en) | COMPOSITE MOLDING PART ESPECIALLY FOR MOTOR VEHICLES | |
| FR2786742A1 (en) | SEAT CUSHION, IN PARTICULAR FOR A MOTOR VEHICLE AND ITS MANUFACTURING PROCESS | |
| EP1841584B1 (en) | Method for making a multilayer part with a flexible local zone, designed for example to be used as interior fitting for a motor vehicle | |
| FR2724869A1 (en) | METHOD FOR MANUFACTURING A PANEL OF MATERIAL COATED WITH AN ASPECT AREA, ESPECIALLY TEXTILE | |
| EP3967478B1 (en) | Method for manufacturing an equipment part for a motor vehicle and associated equipment part | |
| FR3030430A1 (en) | AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL | |
| EP0981982B1 (en) | A method of manufacturing an anti-laceration cover for a seat or the like and seat element with such cover | |
| EP1470545B1 (en) | Sealing and sound-proofing panel for a motor vehicle | |
| EP4032677B1 (en) | Trim element for a vehicle | |
| WO2022018062A1 (en) | Method comprising the construction of a covering assembly for a vehicle passenger compartment | |
| FR2757103A1 (en) | Production of composite comprising decorative covering and foam layer | |
| EP1461195A2 (en) | Textile complex with decorated surface for producing composite parts and composite parts using same | |
| FR2620080A1 (en) | Method of manufacturing a furnishing item integrally with its fireproof barrier and articles of comfort equipped with furnishing items thus obtained | |
| EP3429835B1 (en) | Method for producing an inner trim panel for a motor vehicle | |
| EP3747640A1 (en) | Method for manufacturing a part for a motor vehicle and associated vehicle part | |
| FR3103407A1 (en) | Manufacturing process of a composite thermoplastic part and part obtained | |
| FR2794400A1 (en) | Forming composite automobile sub=frame, etc from fibrous sheets piled so have variable thickness and all fibres parallel, then cut so fibres tangential to upper, lower and lateral edges | |
| FR2869776A1 (en) | Slash-resistant covering for seats in public transport vehicles includes layer of knitted metal filaments partially impregnated by elastomer material | |
| FR3117060A1 (en) | Motor vehicle equipment part and associated method of manufacture | |
| FR2715601A1 (en) | Method for manufacturing reinforced thermoplastic parts and parts obtained by this method. | |
| FR2876307A1 (en) | VEHICLE PIECE HAVING NON-FLUABLE MATERIAL |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 06793647 Country of ref document: EP Kind code of ref document: A2 |