FR2891185A1 - Production of component in tool having cavity forming tool halves, comprises inserting films with bent end areas into the tool half, applying or spraying foam/injection molding material on the films rear surface and pressing the end areas - Google Patents

Production of component in tool having cavity forming tool halves, comprises inserting films with bent end areas into the tool half, applying or spraying foam/injection molding material on the films rear surface and pressing the end areas Download PDF

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Publication number
FR2891185A1
FR2891185A1 FR0509825A FR0509825A FR2891185A1 FR 2891185 A1 FR2891185 A1 FR 2891185A1 FR 0509825 A FR0509825 A FR 0509825A FR 0509825 A FR0509825 A FR 0509825A FR 2891185 A1 FR2891185 A1 FR 2891185A1
Authority
FR
France
Prior art keywords
skin
foam
marginal
tool
marginal portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0509825A
Other languages
French (fr)
Other versions
FR2891185B1 (en
Inventor
Bernhard Baumann
Claus Heinz
Andreas Meyer
Thomas Neuhard
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.)
Faurecia Innenraum Systeme GmbH
Original Assignee
Faurecia Innenraum Systeme GmbH
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
Priority to FR0509825A priority Critical patent/FR2891185B1/en
Application filed by Faurecia Innenraum Systeme GmbH filed Critical Faurecia Innenraum Systeme GmbH
Priority to PCT/EP2006/002948 priority patent/WO2006100118A1/en
Priority to US11/909,234 priority patent/US8394314B2/en
Priority to EP06075680.6A priority patent/EP1767327B1/en
Priority to PCT/EP2006/002944 priority patent/WO2006100117A1/en
Priority to AT06723908T priority patent/ATE530319T1/en
Priority to DE502006008329T priority patent/DE502006008329D1/en
Priority to EP06723904A priority patent/EP1863622B1/en
Priority to EP06723908A priority patent/EP1863623B1/en
Priority to AT06723904T priority patent/ATE488347T1/en
Priority to US11/909,298 priority patent/US7875336B2/en
Publication of FR2891185A1 publication Critical patent/FR2891185A1/en
Application granted granted Critical
Publication of FR2891185B1 publication Critical patent/FR2891185B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/35—Component parts; Details or accessories
    • B29C44/351—Means for preventing foam to leak out from the foaming device during foaming
    • 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
    • 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
    • B29C44/1257—Joining a preformed part and a lining, e.g. around the edges
    • 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
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/143—Means for positioning the lining in the mould

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The end areas (8, 9) are arranged adjacently to each other and oriented and bent in the same direction; pressed together in a foam/injection-tight manner at a bar of a support (2) by a pressure against a wall defining the shape and position of the pressed end areas; merged with one another after inserting the thermoplastic films (3, 4) into the tool; bordered with a decorative strip before the inserting of the films; and arranged away from the cavity of the tool. The movable surface areas of the tool half (10) are area wise pressed together in the area of the cavity. The strip is arranged between the movable surface areas lying opposite to each other and bordered with the films. The support is arranged in the tool half and the bar is extended into the cavity of the tool. A sword is arranged in the tool half, in which the films are placed for production of a groove (7) within the interface area of the films. Independent claims are included for: (1) a tool; and (2) a construction unit.

Description

La présente invention concerne un procédé de fabrication de pièces deThe present invention relates to a method for manufacturing

garniture, ainsi que des pièces de garniture obtenues par mise en oeuvre du procédé.  filling, as well as pieces of lining obtained by implementing the method.

On connaît déjà l'utilisation, comme garniture d'auto- mobile, des pièces comprenant une peau portée par un support rigide avec interposition d'une mousse. On connaît aussi de telles pièces de garniture dans lesquelles la peau est formée avec des caractéristiques différentes. Par exemple, la planche de bord d'une automobile comprend parfois un revêtement formé par une peau d'une première couleur dans sa partie supérieure, et d'une autre couleur dans sa partie inférieure: la peau est réalisée en deux couleurs avant la fabrication de la garniture, soit par soudage, soit par peinture, soit par rotomoulage bicolore. 1l est cependant parfois impossible de réaliser par rotomoulage à des coûts raisonnables les lignes de partage de couleurs demandées par des designers, à cause de la complexité du masquage des moules et du nombre d'outils nécessaires. La différence entre les deux pièces de peau peut aussi être un simple changement de texture ou de grain.  The use as a car lining of parts comprising a skin carried by a rigid support with the interposition of a foam is already known. Such trim pieces are also known in which the skin is formed with different characteristics. For example, the dashboard of an automobile sometimes includes a coating formed by a skin of a first color in its upper part, and another color in its lower part: the skin is made in two colors before manufacture of the packing, either by welding, by painting, or by rotomolding two-color. However, it is sometimes impossible to produce by rotational molding at reasonable cost the color divides requested by designers, because of the complexity of the masking of the molds and the number of tools required. The difference between the two pieces of skin can also be a simple change of texture or grain.

La fabrication de pièces de garniture ayant une peau en une seule pièce a posé un problème d'étanchéité au niveau du raccord entre la peau et la partie rigide de support contre laquelle s'applique la peau pendant l'injection d'un mélange destiné à former une mousse entre la peau et le support. On conçoit que ce problème est encore plus aigu lorsque deux pièces souples de peau sont superposées: le mélange destiné à former la mousse peut facilement pénétrer entre les deux parties de peau et finalement s'échapper, en donnant une imperfection ou au moins un défaut d'aspect au niveau du bord apparent à l'extérieur.  The manufacture of lining pieces having a skin in one piece has posed a sealing problem at the connection between the skin and the rigid part of support against which the skin is applied during the injection of a mixture intended for form a foam between the skin and the support. It is conceivable that this problem is even more acute when two soft pieces of skin are superimposed: the mixture intended to form the foam can easily penetrate between the two parts of skin and finally escape, giving an imperfection or at least a defect of appearance at the apparent edge on the outside.

Malgré ces difficultés d'étanchéité, on souhaite réaliser de telles pièces de garniture avec des peaux en deux ou plusieurs pièces.  Despite these sealing difficulties, it is desired to make such pieces of trim with skins in two or more pieces.

A cet effet, on peut envisager de coller les deux pièces de peau l'une à l'autre avant la fabrication, mais d'autres problèmes se posent alors: positionnement du raccord, débordement de la colle, etc. Une autre solution, décrite dans le document JP-2002052548, concerne un procédé dans lequel les parties marginales superposées des deux pièces de peau sont tenues localement par des sommets de nervures dépassant d'un support rigide. Au niveau des nervures, les parties marginales des deux pièces de peau sont bien appliquées l'une sur l'autre par le moule, mais, entre deux nervures, les parties marginales peuvent s'écarter et permettre le passage de mousse en formation, et donc la formation de défauts d'aspect.  For this purpose, it is conceivable to glue the two pieces of skin to one another before manufacture, but other problems arise then: positioning of the fitting, overflow of the glue, etc. Another solution, described in JP-2002052548, relates to a method in which the superimposed marginal portions of the two skin pieces are held locally by ribs protruding from a rigid support. At the ribs, the marginal portions of the two pieces of skin are well applied to one another by the mold, but, between two ribs, the marginal portions can move apart and allow the passage of foam in formation, and therefore the formation of appearance defects.

L'invention concerne la solution du problème précité, d'une manière qui élimine les défauts d'aspect, par maintien des parties marginales pratiquement sur toute leur longueur. Ce maintien peut être réalisé par exemple par disposition sur toute la longueur des parties marginales d'un élément formé d'une mousse à cellules ouvertes qui permet le passage de la mousse injectée, ou par formation d'un dispositif d'étanchéité, tel qu'une lèvre, au bord de la partie marginale interne, afin que le support ou la mousse permette ce maintien continu sur toute la longueur des parties marginales pratiquement.  The invention relates to the solution of the aforementioned problem, in a manner that eliminates appearance defects, by maintaining the marginal portions substantially over their entire length. This maintenance can be achieved for example by arranging the entire length of the marginal portions of an element made of an open cell foam which allows the passage of the injected foam, or by forming a sealing device, such as a lip, at the edge of the inner marginal portion, so that the support or the foam allows this continuous maintenance over the entire length of the marginal portions practically.

Plus précisément, l'invention concerne un procédé de fabrication d'une pièce de garniture d'automobile du type qui comprend une peau portée par un support rigide avec interposition d'une mousse, la peau étant en au moins deux pièces, les deux pièces de peau se raccordant par superposition continue de leurs parties marginales; le procédé est du type qui comprend la disposition de la peau sur une première partie de moule de manière que la partie marginale de la pièce externe de peau soit en contact pratiquement continu avec la surface de la première partie de moule, la disposition du support sur une seconde partie de moule, la fermeture des première et seconde parties de moule, et l'injection d'un mélange destiné à former une mousse entre la peau et le support. Selon l'invention, pendant l'injection, le procédé comprend le maintien de la partie marginale de la pièce externe de peau en contact continu avec une surface interne pratiquement de la partie marginale de la pièce interne de peau.  More specifically, the invention relates to a method of manufacturing a piece of automotive trim of the type which comprises a skin carried by a rigid support with interposition of a foam, the skin being in at least two pieces, the two pieces of skin joining by continuous superimposition of their marginal parts; the method is of the type which comprises the provision of the skin on a first mold part so that the marginal part of the outer skin part is in substantially continuous contact with the surface of the first mold part, the arrangement of the support on a second mold part, closing the first and second mold parts, and injecting a mixture for forming a foam between the skin and the support. According to the invention, during injection, the method comprises maintaining the marginal portion of the outer skin member in continuous contact with an inner surface substantially of the marginal portion of the inner skin member.

Dans un mode d'exécution, le maintien des parties marginales en contact pratiquement continu comprend l'inser- tion, pratiquement sur toute la longueur des parties marginales superposées, d'un élément de mousse placé entre le support et la partie marginale interne, l'élément de mousse ayant une porosité ouverte telle que le mélange introduit pour la formation de la mousse de la pièce de garniture peut traverser l'élément de mousse.  In one embodiment, maintaining the marginal portions in substantially continuous contact comprises inserting, substantially over the entire length of the superimposed marginal portions, a foam member placed between the support and the inner marginal portion, foam member having an open porosity such that the introduced mixture for forming the foam of the liner piece can pass through the foam member.

Dans un autre mode d'exécution, le maintien des parties marginales en contact pratiquement continu comprend la formation, au bord de la partie marginale interne, d'un dispositif d'étanchéité empêchant pratiquement le passage du mélange de formation de mousse pendant l'injection, de sorte que la partie marginale interne de peau est maintenue par la mousse injectée.  In another embodiment, maintaining the marginal portions in substantially continuous contact comprises forming, at the edge of the inner marginal portion, a sealing device substantially preventing passage of the foam-forming mixture during the injection. , so that the inner marginal portion of skin is maintained by the injected foam.

De préférence, le dispositif d'étanchéité est une lèvre d'étanchéité continue le long du bord de la partie marginale 20 interne.  Preferably, the sealing device is a continuous sealing lip along the edge of the inner marginal portion.

Dans un autre mode d'exécution, le maintien des parties marginales en contact pratiquement continu comprend la mise en contact de la partie marginale interne avec le support suivant une surface pratiquement continue le long de la 25 partie marginale interne.  In another embodiment, maintaining the marginal portions in substantially continuous contact comprises contacting the inner marginal portion with the support along a substantially continuous surface along the inner marginal portion.

Dans une variante, l'une au moins des parties margi- nales, dans sa région en regard de l'autre partie marginale, a au moins un évidement formant réservoir pour la mousse injectée qui aurait pu pénétrer entre les parties margi-30 nales.  In a variant, at least one of the marginal parts, in its region facing the other marginal part, has at least one reservoir recess for the injected foam which could have penetrated between the marginal parts.

Dans une autre variante, le maintien des parties marginales en contact pratiquement continu comprend l'application d'une dépression au voisinage du bord de la partie marginale externe afin que la partie marginale interne soit attirée contre la partie marginale externe.  In another variant, maintaining the marginal portions in substantially continuous contact comprises applying a vacuum in the vicinity of the edge of the outer marginal portion so that the inner marginal portion is drawn against the outer marginal portion.

Dans une autre variante, le maintien des parties marginales en contact pratiquement continu comprend le gonflage 2891185 4 d'un joint contre la partie marginale externe de peau par la première partie de moule de support de la peau.  In another variant, maintaining the marginal portions in substantially continuous contact comprises inflating a seal against the outer marginal skin portion by the first skin support mold portion.

De préférence, le procédé comprend l'utilisation de pièces de peau ayant des caractéristiques différentes. Ces caractéristiques différentes sont avantageusement choisies parmi la couleur, l'épaisseur, la rigidité, la texture, la nature du matériau et le grain.  Preferably, the method comprises the use of skin pieces having different characteristics. These different characteristics are advantageously chosen from among the color, the thickness, the rigidity, the texture, the nature of the material and the grain.

L'invention concerne aussi une pièce de garniture d'automobile, du type qui comprend une peau portée par un support rigide avec interposition d'une mousse, la peau étant en au moins deux pièces, les deux pièces de peau se raccordant par superposition continue de leurs parties marginales; selon l'invention, la pièce de garniture comprend, pratiquement uniquement entre les parties marginales super- posées des pièces de peau et le support, un matériau de mousse à porosité ouverte contenant dans ses pores du matériau de moussage utilisé pour la mousse.  The invention also relates to a piece of automobile trim, of the type which comprises a skin carried by a rigid support with interposition of a foam, the skin being in at least two parts, the two pieces of skin being connected by continuous superposition. their marginal parts; according to the invention, the lining piece comprises, essentially only between the superimposed marginal portions of the skin parts and the support, an open-pored foam material containing in its pores foaming material used for the foam.

D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture de la description qui va suivre d'exemples de réalisation, faite en référence aux dessins annexés sur lesquels: la figure 1 illustre un premier mode d'exécution du procédé selon l'invention; la figure 2 illustre un second mode d'exécution du 25 procédé selon l'invention; et les figures 3 et 4 illustrent deux variantes d'un autre mode d'exécution du procédé de l'invention.  Other features and advantages of the invention will be better understood on reading the following description of embodiments, with reference to the appended drawings, in which: FIG. 1 illustrates a first embodiment of the method according to the invention; Figure 2 illustrates a second embodiment of the method according to the invention; and Figures 3 and 4 illustrate two variants of another embodiment of the method of the invention.

La figure 1 représente en coupe une étape d'un procédé de fabrication selon l'invention, avant la fin du démoulage.  FIG. 1 represents in section a step of a manufacturing method according to the invention, before the end of demolding.

Une pièce de garniture ayant un support rigide 10 et une peau 12 associée par une couche de mousse 14 est placée dans un moule. La peau comprend deux pièces 16 et 18, la pièce 16 formant une partie marginale externe 20 et la pièce 18 formant une partie marginale interne 22, les deux parties marginales étant superposées.  A lining piece having a rigid support 10 and a skin 12 associated with a foam layer 14 is placed in a mold. The skin comprises two pieces 16 and 18, the piece 16 forming an outer marginal portion 20 and the piece 18 forming an inner marginal portion 22, the two marginal portions being superimposed.

Selon l'invention, pour que la mousse injectée entre le support et la peau pendant la fabrication de la pièce n'ait pas tendance à pénétrer entre les parties marginales 2891185 5 20, 22, un élément 24 de mousse à porosité ouverte est disposé entre le support et les parties marginales 20, 22 et les maintient en contact. Pour que la mousse 14 puisse être formée ultérieurement, l'élément 24 de mousse a une porosité ouverte permettant le passage du mélange destiné à former la mousse 14 lorsqu'il est à l'état fluide.  According to the invention, so that the foam injected between the support and the skin during the manufacture of the workpiece does not tend to penetrate between the marginal portions 28, 20, 22, an element 24 of open porosity foam is disposed between the support and the marginal portions 20, 22 and keeps them in contact. In order for the foam 14 to be formed later, the foam member 24 has an open porosity permitting passage of the mixture for forming the foam 14 when in the fluid state.

Dans un exemple, les deux pièces de peau 16 et 18 sont formées d'un même matériau, avec des épaisseurs comparables, mais avec des caractéristiques de couleur différentes. De cette manière, au bord 26 de la pièce 16, qui est apparent sur la pièce terminée, apparaît une différence de couleur.  In one example, the two pieces of skin 16 and 18 are formed of the same material, with comparable thicknesses, but with different color characteristics. In this way, at the edge 26 of the piece 16, which is apparent on the finished piece, appears a color difference.

Bien entendu, les deux parties de peau 16, 18 peuvent avoir d'autres caractéristiques différentes, telles que l'épaisseur, la rigidité, la texture, la nature du matériau et le grain.  Of course, the two skin portions 16, 18 may have other different characteristics, such as thickness, stiffness, texture, nature of the material and grain.

La caractéristique essentielle de l'invention, dans ce mode de réalisation, est que l'élément de mousse 24 main-tient les deux parties marginales 20, 22 en contact l'une avec l'autre. Il peut s'agir d'une mousse relativement rigide ou souple. Une caractéristique importante est que la porosité ouverte de l'élément de mousse soit suffisante pour que la mousse injectée de la couche intermédiaire puisse passer d'un côté à l'autre de l'élément de mousse 24.  The essential feature of the invention, in this embodiment, is that the foam member 24 holds the two marginal portions 20, 22 in contact with each other. It can be a relatively rigid or flexible foam. An important feature is that the open porosity of the foam element is sufficient for the injected foam of the intermediate layer to pass from one side to the other of the foam member 24.

La figure 2 illustre un autre mode d'exécution du procédé de l'invention. Dans ce cas, un support rigide 30 est séparé d'une peau 32 par une couche de mousse 34. La peau 32 comprend une première pièce 36 formant une partie marginale externe 40 et une seconde pièce 38 formant une partie marginale interne 42.  Figure 2 illustrates another embodiment of the method of the invention. In this case, a rigid support 30 is separated from a skin 32 by a layer of foam 34. The skin 32 comprises a first piece 36 forming an outer marginal portion 40 and a second piece 38 forming an internal marginal portion 42.

Selon l'invention, le maintien des parties marginales est assuré par formation d'un dispositif d'étanchéité, représenté par une lèvre d'étanchéité 44, au bord de la partie marginale 42 de la pièce interne 38.  According to the invention, the maintenance of the marginal portions is ensured by forming a sealing device, represented by a sealing lip 44, at the edge of the marginal portion 42 of the inner part 38.

De préférence, des évidements 46 sont réalisés à l'une 35 au moins des faces de la partie marginale interne ou de la partie marginale externe, pour recueillir la mousse qui aurait pu passer sous la lèvre 44.  Preferably, recesses 46 are made at at least one of the faces of the inner marginal portion or the outer marginal portion to collect foam that could have passed under the lip 44.

2891185 6 Un canal 48 formé dans le moule par une gorge est avantageusement destiné à transmettre une dépression qui, lors-qu'elle est créée pendant l'étape d'injection de la mousse, assure le maintien des parties de peau contre la partie associée de moule.  A channel 48 formed in the mold by a groove is advantageously intended to transmit a depression which, when it is created during the foam injection step, ensures the maintenance of the skin parts against the associated part. of mold.

Dans le mode de réalisation représenté, la première pièce de peau 36 a une épaisseur constante, mais la seconde pièce de peau 38, formée d'une matière plastique, a un profil qui délimite à la fois la lèvre d'étanchéité, les réservoirs de mousse et un dégagement facilitant l'applica- tion de la dépression.  In the embodiment shown, the first piece of skin 36 has a constant thickness, but the second piece of skin 38, formed of a plastic material, has a profile which delimits both the sealing lip, foam and a relief facilitating the application of the depression.

Les figures 3 et 4, sur lesquelles les références identiques à celles de la figure 3 désignent des éléments analogues, représentent deux variantes du procédé de l'invention dans lesquelles l'action du dispositif d'étanchéité est complétée par un contact entre la partie marginale interne de la peau et le support. On conçoit que, dans ces conditions, les fuites de mousse entre les deux parties marginales de peau sont très difficiles.  FIGS. 3 and 4, in which the references identical to those of FIG. 3 designate similar elements, represent two variants of the process of the invention in which the action of the sealing device is completed by a contact between the marginal part internal skin and support. It is conceivable that, in these conditions, foam leakage between the two marginal skin parts are very difficult.

Dans les variantes de réalisation des figures 3 et 4, on note que la surface du moule peut comporter des joints gonflables 50 permettant de pousser les parties de peau vers le support 30 afin d'assurer une bonne tenue des parties marginales.  In the embodiments of Figures 3 and 4, it is noted that the surface of the mold may comprise inflatable seals 50 for pushing the skin portions to the support 30 to ensure good holding of the marginal portions.

Bien qu'on ait décrit l'utilisation, en plus d'une lèvre d'étanchéité pour le maintien des parties marginales de peau, à la fois de réservoirs de mousse, d'un canal d'application d'une dépression et de joints gonflables, ces caractéristiques peuvent être utilisées séparément.  Although the use has been described, in addition to a sealing lip for holding the marginal skin portions, of both foam tanks, a vacuum application channel and seals. inflatable, these features can be used separately.

La caractéristique essentielle de l'invention est que les parties marginales des deux pièces de peau sont tenues de façon pratiquement continue sur leur longueur, si bien qu'il ne peut pas se former de passage préférentiel pour la pénétration de mousse lors de l'étape d'injection de mousse.  The essential characteristic of the invention is that the marginal portions of the two pieces of skin are held substantially continuously along their length, so that no preferential passage can be formed for the penetration of foam during the step foam injection.

Claims (10)

REVENDICATIONS 1. Procédé de fabrication d'une pièce de garniture d'automobile du type qui comprend une peau (12, 32) portée par un support rigide (10, 30) avec interposition d'une mousse (14, 34), la peau étant en au moins deux pièces (16, 18; 36, 38), les deux pièces de peau se raccordant par superposition continue de leurs parties marginales (20, 22; 40, 42), le procédé étant du type qui comprend: la disposition de la peau (12, 32) sur une première partie de moule de manière que la partie marginale (20, 40) de la pièce externe de peau (16, 36) soit en contact pratiquement continu avec la surface de la première partie de moule, la disposition du support (10, 30) sur une seconde partie de moule, la fermeture des première et seconde parties de moule, et l'injection d'un mélange destiné à former une mousse entre la peau (12, 32) et le support (10, 30), caractérisé en ce que, pendant l'injection, le procédé comprend le maintien de la partie marginale (20, 40) de la pièce externe (16, 36) de peau en contact continu avec une surface interne pratiquement de la partie marginale (22, 42) de la pièce interne (18, 38) de peau.  A method of manufacturing an automotive trim piece of the type which comprises a skin (12, 32) carried by a rigid support (10, 30) with the interposition of a foam (14, 34), the skin being in at least two pieces (16, 18; 36, 38), the two pieces of skin being joined by continuous superimposition of their marginal portions (20, 22; 40, 42), the method being of the type which comprises: the arrangement of the skin (12, 32) on a first mold part so that the marginal portion (20, 40) of the outer skin piece (16, 36) is in substantially continuous contact with the surface of the first mold part, arranging the support (10, 30) on a second mold portion, closing the first and second mold portions, and injecting a mixture to form a foam between the skin (12, 32) and the support (10, 30), characterized in that during the injection the method comprises holding the marginal portion (20, 40) of the outer piece Skin (16, 36) in continuous contact with an inner surface substantially of the marginal portion (22, 42) of the skin inner piece (18, 38). 2. Procédé selon la revendication 1, caractérisé en ce que le maintien des parties marginales (20, 22) en contact pratiquement continu comprend l'insertion, pratiquement sur toute la longueur des parties marginales superposées, d'un élément (24) de mousse placé entre le support (10) et la partie marginale interne (22), l'élément (24) de mousse ayant une porosité ouverte telle que le mélange introduit pour la formation de la mousse de la pièce de garniture peut traverser l'élément de mousse.  2. Method according to claim 1, characterized in that the maintenance of the marginal portions (20, 22) in substantially continuous contact comprises the insertion, substantially over the entire length of the superimposed marginal portions, of a member (24) of foam placed between the support (10) and the inner marginal part (22), the foam element (24) having an open porosity such that the mixture introduced for the formation of the foam of the lining piece can pass through the element of foam. 3. Procédé selon la revendication 1, caractérisé en ce que le maintien des parties marginales (40, 42) en contact pratiquement continu comprend la formation, au bord de la partie marginale interne (42), d'un dispositif d'étanchéité (44) empêchant pratiquement le passage du mélange de formation de mousse pendant l'injection, de sorte que la partie marginale interne (42) de peau est maintenue par la mousse injectée.  3. A method according to claim 1, characterized in that maintaining the marginal portions (40, 42) in substantially continuous contact comprises forming, at the edge of the inner marginal portion (42), a sealing device (44). ) substantially preventing the passage of the foam-forming mixture during injection, so that the inner marginal portion (42) of skin is maintained by the injected foam. 4. Procédé selon la revendication 3, caractérisé en ce que le dispositif d'étanchéité (44) est une lèvre d'étanchéité continue le long du bord de la partie marginale interne (42)-  4. Method according to claim 3, characterized in that the sealing device (44) is a continuous sealing lip along the edge of the internal marginal portion (42). 5. Procédé selon l'une des revendications 3 et 4,  5. Method according to one of claims 3 and 4, caractérisé en ce que le maintien des parties marginales (40, 42) en contact pratiquement continu comprend la mise en contact de la partie marginale interne (42) avec le support (10) suivant une surface pratiquement continue le long de la partie marginale interne (42).  characterized in that maintaining the marginal portions (40,42) in substantially continuous contact comprises contacting the inner marginal portion (42) with the carrier (10) along a substantially continuous surface along the inner marginal portion ( 42). 6. Procédé selon l'une quelconque des revendications 3 à 5, caractérisé en ce que l'une au moins des parties marginales (40, 42), dans sa région en regard de l'autre partie marginale, a au moins un évidement (46) formant réservoir pour la mousse injectée qui aurait pu pénétrer entre les parties marginales (40, 42).  6. Method according to any one of claims 3 to 5, characterized in that at least one of the marginal portions (40, 42), in its region facing the other marginal part, has at least one recess ( 46) forming a reservoir for the injected foam which could have penetrated between the marginal portions (40, 42). 7. Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le maintien des parties marginales (40, 42) en contact pratiquement continu comprend l'application d'une dépression au voisinage du bord de la partie marginale externe (40) afin que la partie marginale interne (42) soit attirée contre la partie marginale externe (40).  7. Method according to any one of claims 3 to 6, characterized in that the maintenance of the marginal portions (40, 42) in substantially continuous contact comprises the application of a depression in the vicinity of the edge of the outer marginal portion ( 40) so that the inner marginal portion (42) is drawn against the outer marginal portion (40). 8. Procédé selon l'une quelconque des revendications 3 à 7, caractérisé en ce que le maintien des parties margi- nales (40, 42) en contact pratiquement continu comprend le gonflage d'un joint (50) contre la partie marginale externe (40) de peau par la première partie de moule de support de la peau.  8. A method according to any one of claims 3 to 7, characterized in that maintaining the marginal portions (40, 42) in substantially continuous contact comprises inflating a seal (50) against the outer marginal portion ( 40) of skin by the first part of the skin support mold. 9. Procédé selon la revendication 1, caractérisé en ce qu'il comprend l'utilisation de pièces (16, 18; 36, 38) de peau ayant des caractéristiques différentes, choisies parmi la couleur, l'épaisseur, la rigidité, la texture, la nature du matériau et le grain.  9. Method according to claim 1, characterized in that it comprises the use of skin parts (16, 18; 36, 38) having different characteristics, chosen from among the color, the thickness, the rigidity, the texture. , the nature of the material and the grain. 2891185 9  2891185 9 10. Pièce de garniture d'automobile, du type qui comprend une peau (12) portée par un support rigide (10) avec interposition d'une mousse (14), la peau étant en au moins deux pièces (16, 18), les deux pièces de peau se rac- cordant par superposition continue de leurs parties marginales (20, 22), caractérisée en ce qu'elle comprend, pratiquement uniquement entre les parties marginales super-posées (20, 22) des pièces de peau et le support (10), un matériau (24) de mousse à porosité ouverte contenant dans ses pores du matériau de moussage utilisé pour la mousse.Automotive lining part, of the type which comprises a skin (12) carried by a rigid support (10) with interposition of a foam (14), the skin being in at least two parts (16, 18), the two pieces of skin being joined by continuous superposition of their marginal portions (20, 22), characterized in that it comprises, practically only between the superimposed marginal portions (20, 22) of the skin pieces and the support (10), a material (24) of open porosity foam containing in its pores foaming material used for the foam.
FR0509825A 2005-03-22 2005-09-26 METHOD FOR MANUFACTURING TWO-PART SKIN TRIM PIECE, AND PIECE OBTAINED BY ITS IMPLEMENTATION Expired - Fee Related FR2891185B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FR0509825A FR2891185B1 (en) 2005-09-26 2005-09-26 METHOD FOR MANUFACTURING TWO-PART SKIN TRIM PIECE, AND PIECE OBTAINED BY ITS IMPLEMENTATION
EP06723908A EP1863623B1 (en) 2005-03-22 2006-03-22 Method for producing an interior liner for cars
EP06075680.6A EP1767327B1 (en) 2005-03-22 2006-03-22 Method of manufacturing an interior trim panel with a two piece skin and trim panel manufactured according to the method
PCT/EP2006/002944 WO2006100117A1 (en) 2005-03-22 2006-03-22 Method for producing a component provided with a multipart cover layer and said component
AT06723908T ATE530319T1 (en) 2005-03-22 2006-03-22 METHOD FOR PRODUCING AN INTERIOR TRIM PART FOR MOTOR VEHICLES
DE502006008329T DE502006008329D1 (en) 2005-03-22 2006-03-22 METHOD FOR PRODUCING A COMPONENT WITH A MULTIPLE COVERING LAYER, AND COMPONENT
PCT/EP2006/002948 WO2006100118A1 (en) 2005-03-22 2006-03-22 Method for producing a component, a tool for carrying out said method and the component
US11/909,234 US8394314B2 (en) 2005-03-22 2006-03-22 Method for producing a component provided with a multipart cover layer and said component
AT06723904T ATE488347T1 (en) 2005-03-22 2006-03-22 METHOD FOR PRODUCING A COMPONENT WITH A MULTI-PART TOP LAYER, AND COMPONENT
US11/909,298 US7875336B2 (en) 2005-03-22 2006-03-22 Method for producing a component, a tool for carrying out said method and the component
EP06723904A EP1863622B1 (en) 2005-03-22 2006-03-22 Method for producing a component provided with a multipart cover layer and said component

Applications Claiming Priority (1)

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FR0509825A FR2891185B1 (en) 2005-09-26 2005-09-26 METHOD FOR MANUFACTURING TWO-PART SKIN TRIM PIECE, AND PIECE OBTAINED BY ITS IMPLEMENTATION

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FR2891185B1 FR2891185B1 (en) 2010-01-08

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EP3103612A1 (en) * 2015-06-03 2016-12-14 Hyundai Motor Company Apparatus and method for manufacturing interior part of vehicle
US10220552B2 (en) 2015-06-03 2019-03-05 Hyundai Motor Company Apparatus and method for manufacturing interior part of vehicle

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