EP0533883A1 - Method for decorating a part fabricated by injection and decorated part thus obtained - Google Patents

Method for decorating a part fabricated by injection and decorated part thus obtained

Info

Publication number
EP0533883A1
EP0533883A1 EP19920908206 EP92908206A EP0533883A1 EP 0533883 A1 EP0533883 A1 EP 0533883A1 EP 19920908206 EP19920908206 EP 19920908206 EP 92908206 A EP92908206 A EP 92908206A EP 0533883 A1 EP0533883 A1 EP 0533883A1
Authority
EP
European Patent Office
Prior art keywords
mold
decorative element
injection
male
sheet
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.)
Withdrawn
Application number
EP19920908206
Other languages
German (de)
French (fr)
Inventor
Xavier Desjobert
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.)
AMS EUROPE
Original Assignee
AMS EUROPE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMS EUROPE filed Critical AMS EUROPE
Publication of EP0533883A1 publication Critical patent/EP0533883A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B29C45/14688—Coating articles provided with a decoration
    • 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
    • B29C45/14065—Positioning or centering articles in the mould
    • 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
    • B29C45/1418—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 inserts being deformed or preformed, e.g. by the injection pressure
    • 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
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/005—Layered products coated
    • B29L2009/008—Layered products coated metalized, galvanized

Definitions

  • the invention relates to a method of decorating a part produced by injection and a decorated part thus produced.
  • the inventor posed the problem of making a decoration of the "Chinese lacquer” type and found that the classic “in-mold” technique as it was known was not well suited to this problem.
  • FR-A-2 210 504 discloses a method of incorporating a relatively rigid film into a thermoplastic box such as styrene so as to make this box waterproof, when the film is inside the box, or to allow the printing of a decoration when the film is outside the box.
  • this process does not make it possible to obtain a “Chinese lacquer” type decoration.
  • An object of the invention is therefore to make a decoration of the "Chinese lacquer” type on a piece of injected plastic.
  • the invention provides a method of decorating a part based on plastic material produced by injection into a mold, according to which:
  • the decorative element is cut to only partially cover the room and it is embedded in the room, the junction between them being smooth. According to other characteristics of this process:
  • a sheet is used as a decorative element comprising at least one layer of paper.
  • a sheet is used as a decorative element comprising at least one metallization in its external face.
  • Such a part is for example used as packaging, packaging or packaging or packaging element for cosmetics, beauty products, medicines, etc.
  • FIG. 1 is an axial sectional view of a mold of the device according to the invention, in the closed state, the injection of the material of the part being made and the decorative element being in place
  • Figure 2 is an axial sectional view along a plane perpendicular to the section plane of Figure 1
  • FIG. 4 and 5 are two views respectively from above and in perspective of pieces decorated according to the invention
  • FIG. 6 and 7 are two views comparable to Figure 1 showing the mold in the open state respectively without and with decorative element.
  • the invention relates to a method for decorating a plastic part 1 produced by injection into a mold 2.
  • the process includes the following successive steps:
  • the method which has just been described implements a device comprising the mold 2 with its male 4 and female 6 parts displaceable between a closed state and an open state, along an opening - closing axis 7; by means of opening - closing.
  • the male part 4 is provided with at least one injection conduit 8 which opens into the cavity 9 formed by the two male and female parts 4 and 7 in the closed state.
  • This cavity 9 defines the shape, the dimension and the limits of the part 1 injected.
  • This conduit 8 opens into the cavity 9 in an injection zone 10.
  • the device also comprises means for injecting the plastic material which can be associated with the injection conduit 8 (not shown).
  • the device finally comprises the other means usually known from the state of the art for this type of device: heating, cooling, ejection, etc.
  • the male part 4 comprises hooking means 11 for a decorative element 3, active when the mold 2 is in the open state and passive when the mold 2 is in the closed state and the means injection are implemented.
  • the part 1 can be intended to be used as packaging or packaging or packaging or packaging element for cosmetics, beauty products, medicines or the like.
  • the injectable plastic and therefore constituting the part 1 is typically that used for this kind of application.
  • the part 1 can have a dimension of the order of a centimeter, or even less, or several centimeters, or even of the order of more than ten centimeters. Its thickness can be between about 1 to 5 millimeters.
  • Such a part 1 can have radii of curvature of the order of or several tens of centimeters.
  • local attachment of the decorative element 3 to the male part 4 is meant the fact that the decorative element 3 is fixed to the male part 4 in a limited manner and not over its entire surface.
  • the decorative element 3 is qualified as thin because its thickness is a fraction of that of the part 1. For example this thickness is of the order of 1/10 to 5/10 of millimeters.
  • the decorative element 3 is called a sheet because its thickness is substantially constant and its length dimension (perpendicular to its thickness) generally greater, or even very substantially greater than its thickness.
  • the decorative element 3 is called self-supporting because it is able, only maintained by the attachment means 11 and in the absence of external constraints other than its own weight, to maintain itself with a certain held, without sagging.
  • the decorative element 3 is deformable in particular under the effect of sufficient external stresses such as those resulting from the mechanical forces arising from the application of the material flow during injection. This deformation is said to be perpendicular to the plane of the decorative element (although the latter is not necessarily plane) in order to signify that it resembles that of a sheet that is folded or rolled.
  • the decorative element 3 is arranged so that it can be deformed from its original state when it is associated with the male part 4 until it reaches its final state without, in this latter state, exhibiting folds, tears, etc. not desired.
  • the original state is adapted to the final state to be obtained and to the shape of the internal face 5; so that, simultaneously, deformation is possible and that no folds are made.
  • the decorative element 3 is a sheet comprising at least one layer of paper towards its internal face, at least one metallization towards its external face.
  • the support substrate of the decorative element is essentially of, or based on, paper, nonwoven or equivalent.
  • the decorative element is substantially devoid of elongation capacity in its own plane.
  • the decorative element 3 has a certain capacity for elongation in its own plane and is stretched when applied to the internal face 5.
  • the decorative element 3 may have a decorative pattern or appearance towards its external face.
  • the motif or decorative aspect of the element 3 is given by the fact that the element 3 is cut for this purpose to only partially cover the part 1.
  • the element includes spindles, branches or the like 13 from a median zone 14. Not only does this structure make it possible to give a motif or decorative appearance but also it ensures the possibility of the element 3 originally flat then finally curved.
  • the external face of the decorative element 3 is understood to mean its visible face opposite to that applied to and included in the part 1 proper.
  • the attachment means 11 are mechanical, magnetic, pneumatic.
  • the corresponding fixing of the decorative element 3 to the male injection part 4 is then carried out, respectively, by suction, mechanical attachment, magnetic attraction.
  • the attachment means 11 are mechanically operated and comprise at least one lug.
  • a lug 11 can cooperate with a hole, a sheet, a local hollow deformation 15 of the decorative element 3.
  • it is the cutout 15 between the middle zone 14 and the spindles or branches 13.
  • the removable attachment part - male 4 - decorative element is produced in the immediate vicinity of an injection zone 10 and, in line with such an zone 10, the decorative element 3 has a substantially full part on which the injection flow 12 can interfere, which makes it possible to push and move the element 3 by and from this solid part.
  • This solid part is, in this case the middle zone 14.
  • the decorative element 3 is applied to the internal face 5.
  • the decorative element is substantially insensitive to injection temperatures.
  • the decorative element 3 is originally substantially flat or planar. According to a second variant (not shown) it is originally pre-formed at the end of the injection.
  • the opening-closing axis 7 is substantially horizontal and the decorative element 3 originally extends substantially vertically.
  • the attachment means 11 are located in the immediate vicinity (in particular around) of the injection zone and in the protruding middle zone 16.
  • the decorative element 3 is entirely located in the cavity 9 and it is deformed by the internal face 5, although still hooked or associated with the male part 4 by means 11.
  • Such a lug has an axial length substantially equal to the thickness of the decorative element 3 used.
  • the lug 11 is spaced from the internal face 5 of the female part 6.
  • the lug 11 extends in a direction substantially parallel to the direction of the injection flow 12.

Landscapes

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

Abstract

Procédé de décoration d'une pièce (1) à base de matière plastique réalisée par injection dans un moule (2) dans lequel: a) avec le moule (2) ouvert, on fixe de façon amovible à une partie mâle d'injection (4), un élément décoratif (3) mince, auto-portant, déformable de manière à pouvoir être appliqué sur la face interne (5) d'une partie femelle (6) du moule (2); b) puis on ferme le moule (2); c) puis, on injecte la matière de la pièce (1), on déplace et on déforme l'élément décoratif (3) avec le flux (12) de matière injectée pour le détacher de la partie mâle (4) et l'appliquer sur la face interne (5); d) puis, on ouvre le moule (2) et on éjecte la pièce (1).Method of decorating a part (1) based on plastic material produced by injection into a mold (2) in which: a) with the mold (2) open, a removable injection part is fixed to a male part ( 4), a thin, self-supporting, deformable decorative element (3) so that it can be applied to the internal face (5) of a female part (6) of the mold (2); b) then the mold is closed (2); c) then, the material of the part (1) is injected, the decorative element (3) is displaced and deformed with the flow (12) of injected material to detach it from the male part (4) and apply it on the internal face (5); d) then, the mold (2) is opened and the part (1) is ejected.

Description

PROCEDE DE DECORATION D'UNE PIECE REALISEE PAR INJECTION ET PROCESS FOR DECORATING A PART MADE BY INJECTION AND
PIECE DECOREE AINSI REALISEEPIECE DECORATED AS WELL MADE
L'invention concerne un procédé de décoration d'une pièce réalisée par injection et une pièce décorée ainsi réalisée.The invention relates to a method of decorating a part produced by injection and a decorated part thus produced.
On connaît déjà la technique dite "in-Mould" ou décoration dans le moule. Selon cette technique une pièce réalisée par injection est décorée au moyen d'un film transfert supportant la décoration, ce film ayant une pellicule détachable une fois la pièce injectée.We already know the technique called "in-mold" or decoration in the mold. According to this technique, a part produced by injection is decorated by means of a transfer film supporting the decoration, this film having a detachable film once the part is injected.
L'état de la technique est également illustré par les documents suivants : JP-A-2 171 223, US-A-4 948 654, JP-A-2 158 315, JP-A-2 059 307, JP-A-6 226 8700 et JP-A-5 614 6717.The state of the art is also illustrated by the following documents: JP-A-2 171 223, US-A-4 948 654, JP-A-2 158 315, JP-A-2 059 307, JP-A- 6 226 8700 and JP-A-5 614 6717.
L'inventeur s'est posé le problème de réaliser une décoration de type "laque chinoise" et a constaté que la technique classique "in-mould" telle qu'elle était connue n'était pas bien adaptée à ce problème.The inventor posed the problem of making a decoration of the "Chinese lacquer" type and found that the classic "in-mold" technique as it was known was not well suited to this problem.
On connaît de FR-A- 2 210 504 un procédé d'incorporation d'une pellicule relativement rigide à une boîte en thermoplastique tel que le styrène de manière à rendre cette boîte étanche, lorsque la pellicule est à l'intérieur de la boîte, ou à permettre l'impression d'une décoration lorsque la pellicule est à l'extérieur de la boîte. Toutefois, ce procédé ne permet pas d'obtenir une décoration de type "laque chinoise". Un objet de l'invention est donc de .réaliser une décoration de type "laque chinoise" sur une pièce en matière plastique injectée.FR-A-2 210 504 discloses a method of incorporating a relatively rigid film into a thermoplastic box such as styrene so as to make this box waterproof, when the film is inside the box, or to allow the printing of a decoration when the film is outside the box. However, this process does not make it possible to obtain a “Chinese lacquer” type decoration. An object of the invention is therefore to make a decoration of the "Chinese lacquer" type on a piece of injected plastic.
A cet effet l'invention propose un procédé de décoration d'une pièce à base de matière plastique réalisée par injection dans un moule selon lequel :To this end, the invention provides a method of decorating a part based on plastic material produced by injection into a mold, according to which:
a) avec le moule à l'état ouvert, on fixe localement et de façon amovible à une partie mâle d'injection de celui-ci, un élément décoratif mince, en forme de feuille, auto portant, deformable perpendiculairement à son plan, découpé de manière à pouvoir être déformé et appliqué à plat, sans plis sur la face interne d'une partie femelle du moule ;a) with the mold in the open state, locally and removably fixed to a male injection part thereof, a thin decorative element, in the form of a sheet, self-supporting, deformable perpendicular to its plane, cut out so as to be able to be deformed and applied flat, without wrinkles on the internal face of a female part of the mold;
b) puis on fait coopérer les parties mâle et femelle pour amener le moule à l'état fermé ;b) then the male and female parts are made to cooperate to bring the mold to the closed state;
c) puis, le moule étant à l'état fermé, progressivement, on injecte dans le moule la matière constitutive de la pièce , on remplit le moule, on déplace et on déforme l'élément décoratif avec le flux de matière injectée pour le détacher de la partie mâle et l'appliquer à plat en général sur la face interne de la partie femelle ;c) then, the mold being in the closed state, gradually, the constituent material of the part is injected into the mold, the mold is filled, the decorative element is moved and deformed with the flow of injected material to detach it of the male part and apply it generally flat on the internal face of the female part;
d) puis, une fois la pièce réalisée, on amène le moule à l'état ouvert et on éjecte la pièce du moule.d) then, once the part has been produced, the mold is brought to the open state and the part is ejected from the mold.
Selon l'invention, l'élément décoratif est découpé pour ne couvrir que partiellement la pièce et il est incrusté dans la pièce, la jonction entre eux étant lisse. Selon d'autres caractéristiques de ce procédé :According to the invention, the decorative element is cut to only partially cover the room and it is embedded in the room, the junction between them being smooth. According to other characteristics of this process:
- on met en oeuvre comme élément décoratif une feuille comportant au moins une couche de papier.- A sheet is used as a decorative element comprising at least one layer of paper.
- on met en oeuvre comme élément décoratif une feuille comportant au moins une métallisation dans sa face externe.- A sheet is used as a decorative element comprising at least one metallization in its external face.
Une telle pièce est par exemple utilisée comme emballage, conditionnement ou élément d'emballage ou de conditionnement pour la cosmétique, les produits de beauté, les médicaments, etc..Such a part is for example used as packaging, packaging or packaging or packaging element for cosmetics, beauty products, medicines, etc.
L'invention sera bien comprise grâce à la description qui suit en référence aux dessins dans lesquels :The invention will be better understood from the following description with reference to the drawings in which:
- La figure 1 est une vue en coupe axiale d'un moule du dispositif selon l'invention, à l'état fermé, l'injection du matériau de la pièce étant faite et l'élément décoratif étant en place- Figure 1 is an axial sectional view of a mold of the device according to the invention, in the closed state, the injection of the material of the part being made and the decorative element being in place
- La figure 2 est une vue en coupe axiale selon un plan perpendiculaire au plan de coupe de la figure 1- Figure 2 is an axial sectional view along a plane perpendicular to the section plane of Figure 1
- La figure 3 est une vue agrandie de la partie A de la figure 1- Figure 3 is an enlarged view of part A of Figure 1
- Les figures 4 et 5 sont deux vues respectivement de dessus et en perspective de pièces décorées selon 1'invention - Les figures 6 et 7 sont deux vues comparables à la figure 1 représentant le moule à l'état ouvert respectivement sans et avec élément décoratif.- Figures 4 and 5 are two views respectively from above and in perspective of pieces decorated according to the invention - Figures 6 and 7 are two views comparable to Figure 1 showing the mold in the open state respectively without and with decorative element.
L'invention concerne un procédé pour la décoration d'une pièce 1 en matière plastique réalisée par injection dans un moule 2.The invention relates to a method for decorating a plastic part 1 produced by injection into a mold 2.
Le procédé comprend les étapes successives suivantes :The process includes the following successive steps:
a) avec le moule 2 à l'état ouvert, on fixe localement et de façon amovible à une partie mâle d'injection 4 de celui-ci, un élément décoratif 3 mince, en forme de feuille, auto portant, deformable perpendiculairement à son plan, découpé de manière à pouvoir être déformé et appliqué à plat, sans plis sur la face interne 5 d'une partie femelle 6 du moule 2 ;a) with the mold 2 in the open state, locally and removably fixed to a male injection part 4 thereof, a thin decorative element 3, in sheet form, self-supporting, deformable perpendicular to its plane, cut so as to be able to be deformed and applied flat, without folds on the internal face 5 of a female part 6 of the mold 2;
b) puis on fait coopérer les parties mâle 4 et femelle 6 pour amener le moule 2.à l'état fermé ;b) then the male 4 and female 6 parts are made to cooperate in order to bring the mold 2 to the closed state;
c) puis, le moule 2 étant à l'état fermé, progressivement, on injecte dans le moule 2 la matière constitutive de la pièce 1, on remplit le moule 2, on déplace et on déforme l'élément décoratif 3 avec le flux 12 de matière injectée pour le détacher de la partie mâle 4 et l'appliquer à plat en général sur la face interne 5 de la partie femelle 6 ;c) then, the mold 2 being in the closed state, gradually, the constituent material of the part 1 is injected into the mold 2, the mold 2 is filled, the decorative element 3 is moved and deformed with the flow 12 injected material to detach it from the male part 4 and apply it flat generally on the internal face 5 of the female part 6;
d) puis, une fois la pièce 1 réalisée, on amène le moule 2 à l'état ouvert et on éjecte la pièce 1 du moule 2 ; La mise en oeuvre de ce procédé est telle que l'élément décoratif 3 est incrusté sur la pièce 1, la jonction entre eux étant lisse.d) then, once the part 1 has been produced, the mold 2 is brought to the open state and the part 1 is ejected from the mold 2; The implementation of this process is such that the decorative element 3 is encrusted on the part 1, the junction between them being smooth.
Le procédé qui vient d'être décrit met en oeuvre un dispositif comprenant le moule 2 avec ses parties mâle 4 et femelle 6 deplaçables entre un état fermé et un état ouvert, le long d'un axe d'ouverture - fermeture 7 ; grâce à des moyens d'ouverture - fermeture.The method which has just been described implements a device comprising the mold 2 with its male 4 and female 6 parts displaceable between a closed state and an open state, along an opening - closing axis 7; by means of opening - closing.
La partie mâle 4 est pourvue d'au moins un conduit d'injection 8 qui débouche dans la cavité 9 ménagée par les deux parties mâle et femelle 4 et 7 à l'état fermé. Cette cavité 9 définit la forme , la dimension et les limites de la pièce 1 injectée. Ce conduit 8 débouche dans la cavité 9 dans une zone d'injection 10.The male part 4 is provided with at least one injection conduit 8 which opens into the cavity 9 formed by the two male and female parts 4 and 7 in the closed state. This cavity 9 defines the shape, the dimension and the limits of the part 1 injected. This conduit 8 opens into the cavity 9 in an injection zone 10.
Le dispositif comprend également des moyens d'injection de la matière plastique pouvant être associés au conduit d'injection 8 (non représenté).The device also comprises means for injecting the plastic material which can be associated with the injection conduit 8 (not shown).
Le dispositif comprend enfin les autres moyens habituellement connus de l'état de la technique pour ce genre de dispositif : chauffage, refroidissement, éjection, etc..The device finally comprises the other means usually known from the state of the art for this type of device: heating, cooling, ejection, etc.
Ce dispositif est tel que la partie mâle 4 comprend des moyens d'accrochage 11 d'un élément décoratif 3, actifs lorsque le moule 2 est à l'état ouvert et passifs lorsque le moule 2 est à l'état fermé et que les moyens d'injection sont mis en oeuvre. La pièce 1 peut être destinée à être utilisée comme emballage ou conditionnement ou élément d'emballage ou de conditionnement pour la cosmétique, les produits de beauté, les médicaments ou similaires.This device is such that the male part 4 comprises hooking means 11 for a decorative element 3, active when the mold 2 is in the open state and passive when the mold 2 is in the closed state and the means injection are implemented. The part 1 can be intended to be used as packaging or packaging or packaging or packaging element for cosmetics, beauty products, medicines or the like.
La matière plastique injectable et donc constituant la pièce 1 est typiquement celle mise en oeuvre pour ce genre d'application.The injectable plastic and therefore constituting the part 1 is typically that used for this kind of application.
La pièce 1 peut avoir une dimension de l'ordre du centimètre, voire moins, ou plusieurs centimètres, voire de l'ordre de plus du dizaine de centimètres. Son épaisseur peut être comprise entre de l'ordre de 1 à 5 millimètres.The part 1 can have a dimension of the order of a centimeter, or even less, or several centimeters, or even of the order of more than ten centimeters. Its thickness can be between about 1 to 5 millimeters.
Une telle pièce 1 peut avoir des rayons de courbure de l'ordre du ou de plusieurs dizaines de centimètres.Such a part 1 can have radii of curvature of the order of or several tens of centimeters.
On entend par fixation locale de l'élément décoratif 3 à la partie mâle 4, le fait que l'élément décoratif 3 est fixé à la partie mâle 4 de façon limitée et non sur toute sa surface.By local attachment of the decorative element 3 to the male part 4 is meant the fact that the decorative element 3 is fixed to the male part 4 in a limited manner and not over its entire surface.
L'élément décoratif 3 est qualifié de mince parce que son épaisseur est une fraction de celle de la pièce 1. Par exemple cette épaisseur est de l'ordre de 1/10 à 5/10 de millimètres.The decorative element 3 is qualified as thin because its thickness is a fraction of that of the part 1. For example this thickness is of the order of 1/10 to 5/10 of millimeters.
L'élément décoratif 3 est qualifié de feuille parce que son épaisseur est sensiblement constante et sa dimension en longueur (perpendiculairement à son épaisseur) généralement plus grande, voire très sensiblement plus grande que son épaisseur. L'élément décoratif 3 est qualifié d'auto portant parce qu'il est apte, seulement maintenu par les moyens d'accrochage 11 et en l'absence de contraintes extérieures autres que son propre poids, de se maintenir de lui même avec une certaine tenue, sans s'affaisser.The decorative element 3 is called a sheet because its thickness is substantially constant and its length dimension (perpendicular to its thickness) generally greater, or even very substantially greater than its thickness. The decorative element 3 is called self-supporting because it is able, only maintained by the attachment means 11 and in the absence of external constraints other than its own weight, to maintain itself with a certain held, without sagging.
Toutefois, l'élément décoratif 3 est deformable en particulier sous l'effet de contraintes extérieures suffisantes telles que celles résultant des forces mécaniques découlant de l'application du flux de matière lors de l'injection. Cette déformation est dite perpendiculaire au plan de l'élément décoratif (bien que celui-ci ne soit pas nécessairement plan) afin de signifier qu'elle s'apparente à celle d'une feuille qu'on plie ou qu'on roule.However, the decorative element 3 is deformable in particular under the effect of sufficient external stresses such as those resulting from the mechanical forces arising from the application of the material flow during injection. This deformation is said to be perpendicular to the plane of the decorative element (although the latter is not necessarily plane) in order to signify that it resembles that of a sheet that is folded or rolled.
Il est à noter que c'est essentiellement le flux 12 de matière injectée provenant du conduit 8 qui provoque le déplacement, au moins local, de l'élément décoratif là où il était précédemment maintenu par les moyens 11. Ce même flux provoque aussi, dans la réalisation envisagée le détachement de l'élément décoratif 3 des moyens 11.It should be noted that it is essentially the flow 12 of injected material coming from the conduit 8 which causes the displacement, at least locally, of the decorative element where it was previously maintained by the means 11. This same flow also causes, in the envisaged embodiment, the detachment of the decorative element 3 from the means 11.
Ainsi qu'il est mentionné, l'élément décoratif 3 est agencé pour pouvoir être déformé à partir de son état d'origine lors de son association à la partie mâle 4 jusqu'à son état final sans que dans ce dernier état il présente des plis, déchirures, etc.. non souhaités. A cet effet l'état d'origine est adapté à l'état final à obtenir et à la forme de la face interne 5 ; de manière que, simultanément la déformation soit possible et qu'aucun pli ne soit réalisé. L'élément décoratif 3 est une feuille comportant au moins une couche de papier vers sa face interne, au moins une métallisation vers sa face externe.As mentioned, the decorative element 3 is arranged so that it can be deformed from its original state when it is associated with the male part 4 until it reaches its final state without, in this latter state, exhibiting folds, tears, etc. not desired. To this end, the original state is adapted to the final state to be obtained and to the shape of the internal face 5; so that, simultaneously, deformation is possible and that no folds are made. The decorative element 3 is a sheet comprising at least one layer of paper towards its internal face, at least one metallization towards its external face.
Le substrat support de l'élément décoratif est essentiellement du , ou à base de , papier, non tissé ou équivalent.The support substrate of the decorative element is essentially of, or based on, paper, nonwoven or equivalent.
Selon une première variante de réalisation préférentielle l'élément décoratif est substantiellement dépourvu de capacité d'élongation dans son propre plan.According to a first preferred variant embodiment, the decorative element is substantially devoid of elongation capacity in its own plane.
Selon une seconde variante de réalisation utilisable dans certaines applications pour certains effets esthétiques, l'élément décoratif 3 a une certaine capacité d'élongation dans son propre plan et est étiré lorsque appliqué sur la face interne 5.According to a second alternative embodiment usable in certain applications for certain aesthetic effects, the decorative element 3 has a certain capacity for elongation in its own plane and is stretched when applied to the internal face 5.
Par ailleurs, l'élément décoratif 3 peut présenter un motif ou aspect décoratif vers sa face externe.Furthermore, the decorative element 3 may have a decorative pattern or appearance towards its external face.
Le motif ou aspect décoratif de l'élément 3 est donné par le fait que l'élément 3 est découpé à cet effet pour ne couvrir que partiellement la pièce 1.The motif or decorative aspect of the element 3 is given by the fact that the element 3 is cut for this purpose to only partially cover the part 1.
Comme plus spécialement représenté sur la figure 4, l'élément inclut des fuseaux, branches ou équivalent 13 à partir d'une zone médiane 14. Non seulement cette structure permet de donner un motif ou aspect décoratif mais encore elle assure la possibilité de déformation de l'élément 3 originellement plat puis finalement incurvé. On entend par face externe de l'élément décoratif 3 sa face visible opposée à celle appliquée sur et incluse dans la pièce 1 proprement dite.As more particularly represented in FIG. 4, the element includes spindles, branches or the like 13 from a median zone 14. Not only does this structure make it possible to give a motif or decorative appearance but also it ensures the possibility of the element 3 originally flat then finally curved. The external face of the decorative element 3 is understood to mean its visible face opposite to that applied to and included in the part 1 proper.
Selon différentes variantes de réalisation envisageables, les moyens d'accrochage 11 sont à fonctionnement mécanique, magnétique, pneumatique.According to different possible embodiments, the attachment means 11 are mechanical, magnetic, pneumatic.
La fixation correspondante de l'élément décoratif 3 à la partie mâle d'injection 4 est réalisée alors, respectivement, par succion, accrochage mécanique, attraction magnétique.The corresponding fixing of the decorative element 3 to the male injection part 4 is then carried out, respectively, by suction, mechanical attachment, magnetic attraction.
Dans la réalisation plus spécialement considérée et représentée sur les figures, les moyens d'accrochage 11 sont à fonctionnement mécanique et comprennent au moins un ergot. Un tel ergot 11 peut coopérer avec un trou, une feuille, une déformation locale en creux 15 de l'élément décoratif 3. Par exemple, il s'agit de la découpe 15 entre la zone médiane 14 et les fuseaux ou branches 13.In the embodiment more particularly considered and shown in the figures, the attachment means 11 are mechanically operated and comprise at least one lug. Such a lug 11 can cooperate with a hole, a sheet, a local hollow deformation 15 of the decorative element 3. For example, it is the cutout 15 between the middle zone 14 and the spindles or branches 13.
Le cas échéant, il est prévu plusieurs ergots 11 et plusieurs trous, fentes, déformation découpes 15.Where appropriate, several lugs 11 and several holes, slots, cut-out deformation 15 are provided.
Dans la réalisation considérée, la fixation amovible partie - mâle 4 - élément décoratif est réalisée au voisinage immédiat d'une zone d'injection 10 et, au droit d'une telle zone 10, l'élément décoratif 3 a une partie substantiellement pleine sur laquelle le flux d'injection 12 peut interférer, ce qui permet de pousser et déplacer l'élément 3 par et à partir de cette partie pleine. Cette partie pleine est, en l'occurrence la zone médiane 14. L'élément décoratif 3 vient bien s'appliquer sur la face interne 5. L'élément décoratif est substantiellement insensible aux températures d'injection.In the embodiment under consideration, the removable attachment part - male 4 - decorative element is produced in the immediate vicinity of an injection zone 10 and, in line with such an zone 10, the decorative element 3 has a substantially full part on which the injection flow 12 can interfere, which makes it possible to push and move the element 3 by and from this solid part. This solid part is, in this case the middle zone 14. The decorative element 3 is applied to the internal face 5. The decorative element is substantially insensitive to injection temperatures.
Selon une première variante (cas de la figure 7) , l'élément décoratif 3 est originellement substantiellement plat ou plan. Selon une seconde variante (non représentée) il est originellement pré-formé à la fin de l'injection.According to a first variant (case of Figure 7), the decorative element 3 is originally substantially flat or planar. According to a second variant (not shown) it is originally pre-formed at the end of the injection.
Dans la réalisation considérée, l'axe d'ouverture - fermeture 7 est substantiellement horizontal et l'élément décoratif 3 s'étend originellement substantiellement verticalement.In the embodiment considered, the opening-closing axis 7 is substantially horizontal and the decorative element 3 originally extends substantially vertically.
Non seulement c'est la zone médiane 14 de l'élément décoratif 3 qui est fixé à la partie mâle 4 mais il est fixé à la zone médiane 16 de cette partie mâle 4 laquelle est saillante et distale. Les moyens d'accrochage 11 sont situés au voisinage immédiat (notamment autour) de la zone d'injection et dans la zone médiane saillante 16.Not only is it the middle zone 14 of the decorative element 3 which is fixed to the male part 4 but it is fixed to the middle zone 16 of this male part 4 which is protruding and distal. The attachment means 11 are located in the immediate vicinity (in particular around) of the injection zone and in the protruding middle zone 16.
Lorsque les deux parties mâle et femelle 4 et 6 sont amenées à l'état fermé, l'élément décoratif 3 est tout entier situé dans la cavité 9 et il est déformé par la face interne 5, bien qu'encore accroché ou associé à la partie mâle 4 par les moyens 11.When the two male and female parts 4 and 6 are brought to the closed state, the decorative element 3 is entirely located in the cavity 9 and it is deformed by the internal face 5, although still hooked or associated with the male part 4 by means 11.
On se réfère à la réalisation considérée dans laquelle les moyens 11 comprennent un ou plusieurs ergots.Reference is made to the embodiment considered in which the means 11 comprise one or more lugs.
Un tel ergot a une longueur axiale sensiblement égale à l'épaisseur de l'élément décoratif 3 mis en oeuvre. A l'état fermé du moule 2, l'ergot 11 est écarté de la face interne 5 de la partie femelle 6. L'ergot 11 s'étend dans une direction sensiblement parallèle à la direction du flux d'injection 12. Such a lug has an axial length substantially equal to the thickness of the decorative element 3 used. In the closed state of the mold 2, the lug 11 is spaced from the internal face 5 of the female part 6. The lug 11 extends in a direction substantially parallel to the direction of the injection flow 12.

Claims

REVENDICATIONS
1. Procédé de décoration d'une pièce (1) à base de matière plastique réalisée par injection dans un moule (2) selon lequel1. A method of decorating a part (1) based on plastic material produced by injection into a mold (2) according to which
a) avec le moule (2) à l'état ouvert, on fixe localement et de façon amovible à une partie mâle d'injection (4) de celui-ci, un élément décoratif (3) mince, en forme de feuille, auto portant, deformable perpendiculairement à son plan, découpé de manière à pouvoir être déformé et appliqué à plat, sans plis sur la face interne (5) d'une partie femelle (6) du moule (2) ;a) with the mold (2) in the open state, locally and removably fixed to a male injection part (4) thereof, a thin decorative element (3), in sheet form, self bearing, deformable perpendicular to its plane, cut so as to be able to be deformed and applied flat, without folds on the internal face (5) of a female part (6) of the mold (2);
b) puis on fait coopérer les parties ' mâle (4) et femelle (6) pour amener le moule (2) à l'état fermé ;b) then made to cooperate parties male (4) and female (6) to move the mold (2) in the closed state;
c) puis, le moule (2) étant à l'état fermé, progressivement, on injecte dans le moule (2) la matière constitutive de la pièce (1) , on remplit le moule (2) , on déplace et on déforme l'élément décoratif (3) avec le flux (12) de matière injectée pour le détacher de la partie mâlec) then, the mold (2) being in the closed state, gradually, the constituent material of the part (1) is injected into the mold (2), the mold (2) is filled, it is displaced and the shape is deformed. decorative element (3) with the flow (12) of injected material to detach it from the male part
(4) et l'appliquer à plat en général sur la face interne(4) and apply it generally on the inside
(5) de la partie femelle (6) ;(5) of the female part (6);
d) puis, une fois la pièce (1) réalisée, on amène le moule (2) à l'état, ouvert et on éjecte la pièce (1) du moule (2) ;d) then, once the part (1) has been produced, the mold (2) is brought to the open state and the part (1) is ejected from the mold (2);
caractérisé en ce que l'élément décoratif (3) est découpé pour ne couvrir que partiellement la pièce et qu'il est incrusté dans la pièce (1) , la jonction entre eux étant lisse. characterized in that the decorative element (3) is cut to only partially cover the part and that it is embedded in the part (1), the junction between them being smooth.
2. Procédé selon la revendication 1, caractérisé par le fait que l'on met en oeuvre comme élément décoratif (3) une feuille comportant au moins une couche à base de papier.2. Method according to claim 1, characterized in that one uses as decorative element (3) a sheet comprising at least one layer based on paper.
3. Procédé selon la revendication 1, caractérisé par le fait que l'on met en oeuvre comme élément décoratif (3) une feuille comportant au moins une métallisation vers sa face externe.3. Method according to claim 1, characterized in that one uses as a decorative element (3) a sheet comprising at least one metallization towards its outer face.
4. Procédé selon la revendication 1, caractérisé par le fait que l'on met en oeuvre comme élément décoratif (3) une feuille comportant essentiellement du papier formant substrat support.4. Method according to claim 1, characterized in that one uses as decorative element (3) a sheet essentially comprising paper forming a support substrate.
5. Procédé selon la revendication 1, caractérisé par le fait que l'on met en oeuvre un élément décoratif (3) ayant une épaisseur de l'ordre de 1/10 à 5/10 de millimètre, la pièce (1) ayant une épaisseur de l'ordre de 1 à 5 millimètres.5. Method according to claim 1, characterized in that one uses a decorative element (3) having a thickness of the order of 1/10 to 5/10 of a millimeter, the part (1) having a thickness of the order of 1 to 5 millimeters.
6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que l'on met en oeuvre un élément décoratif (3) ayant une partie substantiellement pleine au droit d'une zone d'injection (10). 6. Method according to any one of claims 1 to 5, characterized in that one uses a decorative element (3) having a substantially full part in line with an injection zone (10).
EP19920908206 1991-03-15 1992-03-13 Method for decorating a part fabricated by injection and decorated part thus obtained Withdrawn EP0533883A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103213A FR2673886B1 (en) 1991-03-15 1991-03-15 METHOD AND DEVICE FOR DECORATING A PIECE MADE BY INJECTION AND DECORATED PIECE THUS PRODUCED.
FR9103213 1991-03-15

Publications (1)

Publication Number Publication Date
EP0533883A1 true EP0533883A1 (en) 1993-03-31

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EP (1) EP0533883A1 (en)
FR (1) FR2673886B1 (en)
WO (1) WO1992016349A1 (en)

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FR2710006B1 (en) * 1993-09-17 1995-12-08 Ams Europ Method of decorating a plastic part.
US6004498A (en) * 1994-04-04 1999-12-21 Toyoda Gosei Co. Ltd. Method for molding resin to skin members
DE69521545T2 (en) * 1994-04-04 2002-04-04 Toyoda Gosei Co., Ltd. Process for molding synthetic resin
JP4576024B2 (en) 2000-05-31 2010-11-04 トヨタ紡織株式会社 Manufacturing method and apparatus for integrally molded skin
DE10135816A1 (en) * 2001-07-23 2003-02-06 Bayer Ag Injection of thermoplastic resin onto rear side printed films during which a leading film end is pressed progressively against a tool cavity wall by melt as it enters a tool cavity
ES2190363B1 (en) * 2001-10-09 2004-11-01 Protecnos, S.A. PROCEDURE FOR DECORATION OF MOLDED PARTS IN PLASTIC MATERIAL.
FR3017322B1 (en) * 2014-02-07 2016-07-22 Visteon Global Tech Inc INJECTION INSERT COATING ON THE BACK OF A SKIN

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US3668034A (en) * 1970-08-05 1972-06-06 Us Industries Inc Method for making a decorative plastic laminate
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FR2673886A1 (en) 1992-09-18
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