FR2790424A1 - Manufacture of back-injected, simultaneously-thermoformed moldings with stylish metallic surfaces, commences with laminar thermoplastic and stainless panel, and forms prestigious, internal and external vehicle trims and equipment - Google Patents

Manufacture of back-injected, simultaneously-thermoformed moldings with stylish metallic surfaces, commences with laminar thermoplastic and stainless panel, and forms prestigious, internal and external vehicle trims and equipment Download PDF

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Publication number
FR2790424A1
FR2790424A1 FR9902696A FR9902696A FR2790424A1 FR 2790424 A1 FR2790424 A1 FR 2790424A1 FR 9902696 A FR9902696 A FR 9902696A FR 9902696 A FR9902696 A FR 9902696A FR 2790424 A1 FR2790424 A1 FR 2790424A1
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France
Prior art keywords
layer
thermoplastic
metal layer
adhesive
plate
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Granted
Application number
FR9902696A
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French (fr)
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FR2790424B1 (en
Inventor
Guy Estran
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Nobel Plastiques SA
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Nobel Plastiques SA
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Priority to FR9902696A priority Critical patent/FR2790424B1/en
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Publication of FR2790424B1 publication Critical patent/FR2790424B1/en
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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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14811—Multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0415—Ornamental plaques, e.g. decorative panels, decorative veneers containing metallic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
    • B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0087—Wear resistance
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • 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
    • B32B2311/00—Metals, their alloys or their compounds
    • 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
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A plastic panel (1) undergoes plastic deformation. It comprises a metallic layer (2), adhesive (3) and a thermoplastic sheet substrate (4). Preferred features: The thermoplastic substrate, at least at the surface opposite the adhesive layer, bonds with injected thermoplastic. In a development, a protective layer (not shown) covers the metallic layer, on the side opposite the adhesive. Substrate and adhesive are transparent. An additional layer over the metallic layer (2), on the side opposite the adhesive, also bonds with injected thermoplastic. In manufacture, the panel is located in a mold, the bonding layer facing into the cavity. The selected thermoplastic is injected into the cavity. Forming and injection coincide. The panel is calendered.

Description

La présente invention concerne un procédé de fabrication de pièces ayantThe present invention relates to a method of manufacturing parts having

un aspect externe métallique.an external metallic appearance.

Un tel procédé est par exemple utilisable dans le domaine de l'industrie automobile pour réaliser des pare-chocs, des5 enjoliveurs de roues, des ceintures de caisses, des enjoliveurs de calandre, des coques de rétroviseurs, et  Such a method can, for example, be used in the automotive industry to produce bumpers, wheel covers, body belts, radiator covers, mirror caps, and

plus généralement toute pièce d'aspect décoratif... D'une manière générale, les consommateurs atten-  more generally any room with a decorative appearance ... Generally speaking, consumers expect

dent des pièces qui composent un article qu'elles soient  tooth of the parts which compose an article that they are

fiables et aient un aspect extérieur esthétique et durable.  reliable and have an aesthetic and durable external appearance.

Les pièces en métal sont ainsi largement répan-  Metal parts are thus widely distributed

dues dans l'industrie en raison de leur solidité et de leur  owed in the industry because of their strength and

aspect métallique qui est noble et résistant.  metallic appearance which is noble and resistant.

Toutefois, les pièces en matière plastique s'imposent au détriment des pièces en métal en raison du faible coût de la matière plastique, de ses possibilités de  However, plastic parts are required at the expense of metal parts because of the low cost of plastic, its possibilities of

mise en oeuvre adaptées aux grandes séries, de sa légère-  implementation adapted to large series, its slight-

té... L'aspect final de ces pièces en matière plastique  tee ... The final appearance of these plastic parts

est généralement obtenu par une opération de peinture.  is generally obtained by a painting operation.

Cependant, cette technique nécessite un nettoyage préalable des pièces et un traitement ultérieur de celles-ci pour améliorer la résistance de la couche de peinture. En outre, des difficultés d'adhésion de la peinture sur certaines matières plastiques telles que le polypropylene sont fréquemment rencontrées. Ceci augmente le coût de revient  However, this technique requires prior cleaning of the parts and subsequent treatment thereof to improve the resistance of the paint layer. In addition, difficulties in adhesion of paint to certain plastics such as polypropylene are frequently encountered. This increases the cost

de ces pièces.of these pieces.

Il est également connu des procédés de coloration de la matière plastique dans la masse. L'aspect obtenu est  It is also known methods for coloring the plastic material in the mass. The aspect obtained is

alors peu valorisant et résiste mal aux agressions exté-  then little rewarding and poorly resists external aggressions

rieures. Une autre technique consiste à revêtir les pièces d'un film coloré en matière thermoplastique. L'aspect obtenu est alors relativement résistant. Cependant, il n'est pas possible avec cette technique d'obtenir un aspect métallique, aspect qui est le plus recherché par les  laughing. Another technique consists in coating the parts with a colored film of thermoplastic material. The appearance obtained is then relatively resistant. However, it is not possible with this technique to obtain a metallic appearance, an aspect which is most sought after by

consommateurs en raison de son caractère noble.  consumers due to its noble character.

Il existe donc un besoin non résolu de manière commode à ce jour de pièces ayant un aspect durable et semblable à celui des pièces réalisées en métal et posse- dant les caractéristiques avantageuses des pièces en  There is therefore a need that has not yet been conveniently solved for parts having a durable appearance similar to that of parts made of metal and having the advantageous characteristics of parts made of metal.

matière thermoplastique.thermoplastic material.

A cet effet, on prévoit, selon l'invention, un  To this end, provision is made, according to the invention, for a

procédé de fabrication de pièces ayant une surface décora-  method of manufacturing parts having a decorative surface

tive d'aspect métallique, comprenant l'étape de mettre en forme par une opération de déformation plastique une plaque comprenant au moins une couche en matériau métallique associée par l'intermédiaire d'une couche adhésive à une feuille en matériau thermoplastique de support de la couche  tive metallic appearance, comprising the step of shaping by a plastic deformation operation a plate comprising at least one layer of metallic material associated via an adhesive layer to a sheet of thermoplastic material for supporting the layer

métallique.metallic.

Ainsi, la surface décorative de la pièce est  Thus, the decorative surface of the room is

celle de la surface visible de la couche métallique.  that of the visible surface of the metallic layer.

L'aspect métallique obtenu présente une bonne résistance aux agressions extérieures et notamment aux rayures. En outre, il est aisément possible d'obtenir des effets brossés, satinés, grand brillants, guillochés, en traitant de façon correspondante la surface visible de la couche métallique. Selon une première réalisation particulière, le matériau thermoplastique constituant la feuille de support présente, au moins au niveau d'une surface de la feuille de support opposée à la couche adhésive, des propriétés de  The metallic appearance obtained has good resistance to external aggressions and in particular to scratches. In addition, it is easily possible to obtain brushed, satin, high gloss, guilloche effects, by correspondingly treating the visible surface of the metallic layer. According to a first particular embodiment, the thermoplastic material constituting the support sheet has, at least at a surface of the support sheet opposite the adhesive layer, properties of

liaison avec un matériau thermoplastique déterminé d'injec-  bond with a specific thermoplastic material for injection

tion. La feuille en matériau thermoplastique assure alors, outre sa fonction de support de la couche métallique, une fonction de liaison de la couche métallique au matériau  tion. The sheet of thermoplastic material then performs, in addition to its function of supporting the metal layer, a function of bonding the metal layer to the material.

thermoplastique prédéterminé qui sera injecté ultérieure-  predetermined thermoplastic which will be injected later-

ment pour constituer, par exemple, la structure porteuse de  ment to constitute, for example, the supporting structure of

la pièce.the room.

Avantageusement alors, une couche de protection s'étend sur la couche métallique d'un côté opposé à la  Advantageously then, a protective layer extends over the metal layer on a side opposite to the

couche adhésive. La durabilité de l'aspect obtenu est encore augmentée. Selon une deuxième réalisation, la couche adhé-  adhesive layer. The durability of the appearance obtained is further increased. According to a second embodiment, the adhered layer

sive et la feuille de support sont transparentes, et une couche s'étend sur la couche métallique d'un côté opposé à la couche adhésive, cette couche présentant des propriétés de liaison avec un matériau thermoplastique déterminé d'injection. La feuille en matériau plastique assure outre sa fonction de support de la couche métallique, une  sive and the support sheet are transparent, and a layer extends over the metal layer on a side opposite to the adhesive layer, this layer having bonding properties with a determined thermoplastic injection material. The plastic sheet provides, in addition to its function of supporting the metal layer, a

fonction de protection de celle-ci.protection function thereof.

Selon une caractéristique particulière à ces deux réalisations, le procédé selon l'invention comprend les étapes de: - disposer la plaque dans un moule, la couche ayant de propriétés de liaison s'étendant d'un côté intérieur au moule par rapport à la couche métallique,  According to a characteristic particular to these two embodiments, the method according to the invention comprises the steps of: - placing the plate in a mold, the layer having bonding properties extending on one side inside the mold relative to the layer metallic,

- injecter dans le moule le matériau thermoplas-  - inject the thermoplastic material into the mold -

tique déterminé, l'étape d'injection pouvant être réalisée  tick determined, the injection step can be carried out

concomitamment à l'étape de mise en forme.  concomitantly with the shaping stage.

D'autres caractéristiques et avantages de l'in-  Other features and advantages of the

vention apparaîtront plus clairement à la lumière de la  vention will appear more clearly in light of the

description qui suit d'un mode de mise en oeuvre particu-  description which follows of a particular mode of implementation

lier non limitatif de l'invention.non-limiting link of the invention.

Il sera fait référence aux dessins annexés, parmi lesquels:  Reference will be made to the appended drawings, among which:

- la figure 1 est une vue en coupe dans l'épais-  - Figure 1 is a sectional view in the thick-

seur d'une plaque d'un premier type pour la mise en oeuvre du procédé selon l'invention, - la figure 2 est une vue analogue à la figure 1 d'une variante de la plaque du premier type, - la figure 3 est une vue analogue à la figure 1  source of a plate of a first type for implementing the method according to the invention, - Figure 2 is a view similar to Figure 1 of a variant of the plate of the first type, - Figure 3 is a view similar to Figure 1

d'une plaque d'un deuxième type.of a plate of a second type.

En référence aux figures, le procédé de fabrica-  With reference to the figures, the manufacturing process

tion de pièces conforme à l'invention consiste à réaliser une pièce ayant une surface décorative d'aspect métallique à partir d'une plaque 1 comprenant une couche métallique 2 recouvrant par l'intermédiaire d'une couche adhésive 3 une  tion of parts according to the invention consists in producing a part having a decorative surface of metallic appearance from a plate 1 comprising a metal layer 2 covering, by means of an adhesive layer 3, a

surface d'une feuille de support 4 en matériau thermoplas-  surface of a support sheet 4 of thermoplastic material

tique. La pièce est réalisée de manière qu'une surface 2.1 de la couche métallique 2 soit visible et procure ainsi à  tick. The part is made so that a surface 2.1 of the metal layer 2 is visible and thus provides

la pièce son aspect métallique.the piece looks metallic.

A la figure 1, on peut voir un premier type de  In Figure 1, we can see a first type of

plaque 1.plate 1.

La couche métallique 2 est ici réalisée en acier inoxydable et a une épaisseur comprise entre 5 et 30 M. Un  The metal layer 2 is here made of stainless steel and has a thickness of between 5 and 30 M. A

autre métal pourra bien entendu être employé.  other metal can of course be used.

La feuille de support 4 est elle réalisée en polyoléfine, ici du polypropylène, et a une épaisseur d'environ 0,4 mm. La feuille de support 4 présente ici des propriétés de liaison avec un matériau thermoplastique destiné à former la structure porteuse de la piece. Ce matériau thermoplastique sera par exemple une polyoléfine, comme du polypropylène. Ce matériau étant identique à celui de la feuille support, il est possible d'obtenir une adhésion par soudure. La feuille de support 4 pourra également ne présenter ces propriétés qu'au niveau de sa surface opposée à la couche adhésive 3 par exemple à l'aide  The support sheet 4 is made of polyolefin, here polypropylene, and has a thickness of about 0.4 mm. The support sheet 4 here has properties of connection with a thermoplastic material intended to form the support structure of the part. This thermoplastic material will for example be a polyolefin, such as polypropylene. This material being identical to that of the support sheet, it is possible to obtain adhesion by welding. The support sheet 4 may also have these properties only at its surface opposite the adhesive layer 3, for example using

d'un traitement physique ou chimique.  physical or chemical treatment.

La couche adhésive 3 est formée à partir d'un  The adhesive layer 3 is formed from a

adhésif thermoréactivable présentant des qualités d'adhé-  heat-activated adhesive with adhesion qualities

sion avec le polypropylène et l'acier inoxydable.  with polypropylene and stainless steel.

La plaque 1 est réalisée par coextrusion de la feuille de support 4, de la couche adhésive 3 et de la couche métallique 2 puis calandrage. La plaque 4 peut  The plate 1 is produced by coextrusion of the support sheet 4, of the adhesive layer 3 and of the metal layer 2, then calendering. Plate 4 can

également être réalisée par contrecollage.  also be made by laminating.

En variante, telle que représentée à la figure 2, un vernis protecteur 5 transparent recouvre la surface 2.1 de la couche métallique 2 opposée à celle 2.2 recouverte par la couche adhésive 3. Ce vernis est particulièrement utile lorsque la couche métallique est en un métal peu  As a variant, as shown in FIG. 2, a transparent protective varnish 5 covers the surface 2.1 of the metallic layer 2 opposite to that 2.2 covered by the adhesive layer 3. This varnish is particularly useful when the metallic layer is made of a thin metal

résistant à l'oxydation.resistant to oxidation.

Dans un deuxième type de plaque représenté à la figure 3, la feuille de support 4 est réalisée en polyamide (PAl2) transparent et s'étend du côté de la surface 2.1  In a second type of plate shown in Figure 3, the support sheet 4 is made of transparent polyamide (PAl2) and extends from the side of the surface 2.1

destinée à être visible de la couche métallique 2.  intended to be visible from the metal layer 2.

La feuille de support 4 assure alors, outre sa fonction de support, une fonction de protection de la  The support sheet 4 then provides, in addition to its support function, a protection function for the

couche métallique 2.metal layer 2.

La couche adhésive 3 est réalisée à partir d'un adhésif transparent présentant des propriétés d'adhésion  The adhesive layer 3 is produced from a transparent adhesive having adhesion properties

avec l'acier inoxydable et le polyamide.  with stainless steel and polyamide.

Une couche 6 s'étend sur la surface 2.2 de la couche métallique 1 opposée à la surface 2.1 de cette couche métallique recouverte par la couche adhésive 3. La couche 6 est réalisée à partir d'un adhésif présentant des propriétés de liaison avec l'acier inoxydable et un matériau thermoplastique destiné à former la structure porteuse de la pièce. Ce matériau thermoplastique sera  A layer 6 extends over the surface 2.2 of the metal layer 1 opposite the surface 2.1 of this metal layer covered by the adhesive layer 3. The layer 6 is produced from an adhesive having properties of bonding with the stainless steel and a thermoplastic material intended to form the supporting structure of the part. This thermoplastic material will

comme précédemment du polypropylène.  as before polypropylene.

Pour les deux types de plaques, le procédé de fabrication selon l'invention débute par une étape de mise en forme de la plaque 1 par une opération de déformation plastique, telle qu'une opération de thermoformage ou d'emboutissage ou tout autre mode de déformation. Cette opération vise à conférer à la plaque 1 la forme extérieure définitive de la pièce. La forme prévue de la pièce à réaliser permet de déterminer le coefficient d'allongement minimal que doit posséder la couche métallique 2 et la plaque 1 d'une manière générale. Pour une forme de com- plexité moyenne, un coefficient d'allongement au moins égal  For the two types of plates, the manufacturing process according to the invention begins with a step of shaping the plate 1 by a plastic deformation operation, such as a thermoforming or stamping operation or any other mode of deformation. This operation aims to give the plate 1 the final external shape of the part. The planned shape of the part to be produced makes it possible to determine the minimum coefficient of elongation that the metal layer 2 and the plate 1 must have in general. For a form of medium complexity, an elongation coefficient at least equal

à 30 % sera suffisant.at 30% will be enough.

La plaque ainsi formée constitue une ébauche et est ensuite disposée dans un moule d'injection, de manière que la couche ayant des propriétés de liaison (feuille support 4 pour la plaque du premier type et couche de liaison 6 pour la plaque du deuxième type) de la plaque 1 s'étende à l'intérieur du moule par rapport à la couche  The plate thus formed constitutes a blank and is then placed in an injection mold, so that the layer having bonding properties (support sheet 4 for the plate of the first type and bonding layer 6 for the plate of the second type) of plate 1 extends inside the mold relative to the layer

métallique 2.metallic 2.

Le matériau thermoplastique destiné à former la  The thermoplastic material intended to form the

structure porteuse de la pièce, en l'occurrence le polypro-  supporting structure of the part, in this case polypro-

pylène, est ensuite injecté dans le moule. Pour la plaque du premier type, la couche ayant des propriétés de liaison et le matériau injecté se soudent l'un à l'autre sous l'effet de la température de ce matériau et de la pression d'injection. Pour la plaque du deuxième type, la couche 6  pylene, is then injected into the mold. For the plate of the first type, the layer having bonding properties and the injected material are welded to each other under the effect of the temperature of this material and the injection pressure. For the plate of the second type, layer 6

sera de préférence réalisé à partir d'un adhésif thermo-  preferably be made from a thermo-adhesive

réactivable, le polypropylène ramolli à relativement haute température assurant la thermoréaction et la pression d'injection favorisant l'adhésion de celui-ci à la couche 6. On pourra également préchauffer cette couche avant  reactivated, polypropylene softened at relatively high temperature ensuring thermoreaction and injection pressure promoting adhesion of the latter to layer 6. This layer can also be preheated

l'opération d'injection.the injection operation.

En variante, on pourra réaliser une étape de mise en forme partielle de la plaque préalablement à l'étape d'injection, ou réaliser l'étape de mise en forme et l'étape d'injection simultanément. La plaque non déformée sera alors disposée dans le moule, le matériau injecté sous pression appliquant la plaque contre le moule. On pourra également réaliser des pièces par une simple opération de  As a variant, it will be possible to carry out a partial shaping step of the plate prior to the injection step, or carry out the shaping step and the injection step simultaneously. The non-deformed plate will then be placed in the mold, the material injected under pressure applying the plate against the mold. We can also make parts by a simple operation of

thermoformage de la plaque.thermoforming of the plate.

Bien entendu l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des  Of course, the invention is not limited to the embodiment described and it is possible to add to it

variantes de réalisation sans sortir du cadre de l'inven- tion tel que défini par les revendications.  variant embodiments without departing from the scope of the invention as defined by the claims.

Claims (13)

REVENDICATIONS 1. Procédé de fabrication de pièces ayant une surface décorative d'aspect métallique, caractérisé en ce qu'il comprend l'étape de: - mettre en forme par une opération de déforma- tion plastique une plaque (1) comprenant au moins une  1. A method of manufacturing parts having a decorative surface with a metallic appearance, characterized in that it comprises the step of: - shaping by a plastic deformation operation a plate (1) comprising at least one couche en matériau métallique (2) associée par l'intermé-  layer of metallic material (2) associated by means of diaire d'une couche adhésive (3) à une feuille (4) en  from an adhesive layer (3) to a sheet (4) in matériau thermoplastique de support de la couche métalli-  thermoplastic material for supporting the metallic layer que.  than. 2. Procédé selon la revendication 1, caractérisé en ce que le matériau thermoplastique constituant la feuille de support (4) présente, au moins au niveau d'une surface de la feuille de support opposée à la couche adhésive (3), des propriétés de liaison avec un matériau2. Method according to claim 1, characterized in that the thermoplastic material constituting the support sheet (4) has, at least at a surface of the support sheet opposite the adhesive layer (3), properties of bond with a material thermoplastique déterminé d'injection.  determined injection thermoplastic. 3. Procédé selon la revendication 1 ou la reven-  3. Method according to claim 1 or the res- dication 2, caractérisé en ce qu'une couche de protection (5) s'étend sur la couche métallique (1) d'un côté opposé  dication 2, characterized in that a protective layer (5) extends over the metal layer (1) on an opposite side à la couche adhésive (3).to the adhesive layer (3). 4. Procédé selon la revendication 1, caractérisé en ce que la couche adhésive (3) et la feuille de support  4. Method according to claim 1, characterized in that the adhesive layer (3) and the support sheet (4) sont transparentes.(4) are transparent. 5. Procédé selon la revendication 4, caractérisé en ce qu'une couche (6) s'étend sur la couche métallique (2) d'un côté opposé à la couche adhésive (3), cette couche présentant des propriétés de liaison avec un matériau  5. Method according to claim 4, characterized in that a layer (6) extends over the metal layer (2) on a side opposite to the adhesive layer (3), this layer having properties of bonding with a material thermoplastique déterminé d'injection.  determined injection thermoplastic. 6. Procédé selon la revendication 2 ou la reven-  6. Method according to claim 2 or the res- dication 5, caractérisé en ce qu'il comprend les étapes de: - disposer la plaque (1) dans un moule, la couche ayant des propriétés de liaison (4, 6) s'étendant d'un côté intérieur au moule par rapport à la couche métallique (2),  dication 5, characterized in that it comprises the steps of: - placing the plate (1) in a mold, the layer having bonding properties (4, 6) extending on one side inside the mold relative to the metal layer (2), - injecter dans le moule le matériau thermoplas-  - inject the thermoplastic material into the mold - tique déterminé.determined tick. 7. Procédé selon la revendication 6, caractérisé en ce que l'étape de mise en forme et l'étape d'injection  7. Method according to claim 6, characterized in that the shaping step and the injection step sont réalisées concommitamment.are carried out concomitantly. 8. Procédé selon l'une des revendications précé-  8. Method according to one of the preceding claims - dentes, caractérisé en ce que la couche métallique (2) a un  teeth, characterized in that the metal layer (2) has a coefficient d'allongement au moins égal à 30%.  elongation coefficient at least equal to 30%. 9. Procédé selon l'une des revendications précé-  9. Method according to one of the preceding claims - dentes, caractérisé en ce que la couche métallique (2) a  teeth, characterized in that the metal layer (2) has une épaisseur comprise entre 5 et 30 Mm.  a thickness between 5 and 30 mm. 10. Procédé selon l'une des revendications précé-  10. Method according to one of the preceding claims - dentes, caractérisé en ce que la couche métallique (2) est  teeth, characterized in that the metal layer (2) is en acier inoxydable.Stainless steel. 11. Procédé selon l'une des revendications  11. Method according to one of claims précédentes, caractérisé en ce que la feuille de support  previous, characterized in that the backing sheet (4) est en polyamide.(4) is made of polyamide. 12. Procédé selon l'une des revendications 1 à  12. Method according to one of claims 1 to , caractérisé en ce que la feuille de support (4) est en polyoléfine.  , characterized in that the support sheet (4) is made of polyolefin. 13. Procédé selon l'une des revendications précédentes, caractérisé en ce que la plaque (1) est  13. Method according to one of the preceding claims, characterized in that the plate (1) is réalisée par calandrage.performed by calendering.
FR9902696A 1999-03-04 1999-03-04 PROCESS FOR THE MANUFACTURE OF PARTS HAVING A DECORATIVE SURFACE OF METALLIC APPEARANCE Expired - Fee Related FR2790424B1 (en)

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EP1488958A1 (en) * 2003-06-12 2004-12-22 REUM GmbH & Co. Betriebs KG Composite element and method of producing it
WO2006050391A1 (en) * 2004-11-01 2006-05-11 E.I. Dupont De Nemours And Company Joining of thermoplastics with other types of materials
WO2006102957A2 (en) * 2005-04-01 2006-10-05 Jowat Ag Method for laminating flat support materials on substrates
WO2006102957A3 (en) * 2005-04-01 2007-01-18 Jowat Ag Method for laminating flat support materials on substrates
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US8551279B2 (en) 2008-03-25 2013-10-08 3M Innovative Properties Company Multilayer articles and methods of making and using the same
US8932424B2 (en) 2008-03-25 2015-01-13 3M Innovative Properties Company Paint film composites and methods of making and using the same
US8992718B2 (en) 2008-03-25 2015-03-31 3M Innovative Properties Company Multilayer articles and methods of making and using the same
WO2009120547A3 (en) * 2008-03-25 2010-10-07 3M Innovative Properties Company Paint film composites and methods of making and using the same
US9656442B2 (en) 2008-03-25 2017-05-23 3M Innovative Properties Company Paint film composites and methods of making and using the same
ITVR20090149A1 (en) * 2009-09-28 2011-03-29 Pozzani Davide PROCEDURE FOR THE CONSTRUCTION OF COATING ELEMENTS FOR WALL OR PAVING SURFACES
EP2527141A1 (en) * 2010-01-18 2012-11-28 Sumitomo Electric Industries, Ltd. Composite structural member
EP2527141A4 (en) * 2010-01-18 2013-07-03 Sumitomo Electric Industries Composite structural member

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