FR2664531A1 - Multi-material part and method for obtaining it - Google Patents

Multi-material part and method for obtaining it Download PDF

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Publication number
FR2664531A1
FR2664531A1 FR9009192A FR9009192A FR2664531A1 FR 2664531 A1 FR2664531 A1 FR 2664531A1 FR 9009192 A FR9009192 A FR 9009192A FR 9009192 A FR9009192 A FR 9009192A FR 2664531 A1 FR2664531 A1 FR 2664531A1
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Prior art keywords
plastic material
common
interface
part according
elements
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French (fr)
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Brun Pierre
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of 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
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • B29C66/73116—Melting point of different melting point, i.e. the melting point of one of the parts to be joined being different from the melting point of the other part
    • 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
    • B32B1/00—Layered products having a general shape other than plane
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/121—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives by heating
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0088—Blends of polymers
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Abstract

This part is formed by the joining of at least one first element made of a first plastic having a first melting point, and a second element made of a second plastic having a second melting point, the two elements being in contact with each other along a common junction interface. According to the invention, at least one of the plastics is a mixture or alloy of at least two, respectively different, polymers and the two plastics are chosen with respect to each other in order to have at least one common component, called the adhesion component, that is to say a component capable of diffusing from the plastic comprising it into the other plastic, through the common interface (4, 40), when hot, that is to say when the two elements (2, 3, 20, 30) are together raised to a temperature at least equal to the lower melting point, whereby the common interface (4, 40) consists of a direct adhesive bond which joins the two elements (2, 3, 20, 30).

Description

PIECE MULTI-MATIERE, ET SON
PROCEDE D'OBTENTION
La présente invention a trait au domaine du façonnage des matières plastiques, par injection, extrusion, moulage, etc..., pour obtenir des pièces dites multi-matière, en ce sens que ces dernières sont constituées par des éléments en des matières plastiques respectivement différentes, assemblés les uns aux autres, avec un interface commun de contact.MULTI-MATERIAL PIECE AND SOUND
PROCESS FOR OBTAINING
The present invention relates to the field of shaping plastics, by injection, extrusion, molding, etc., in order to obtain so-called multi-material parts, in the sense that the latter consist of elements made of plastic materials respectively. different, assembled to each other, with a common contact interface.

A titre d'exemple non limitatif, et dans le seul but d'illustrer l'invention, on sait construire des galets de roulement comprenant, d'une part une âme ou jante annulaire en une première matière plastique tech- nique, telle qu'un polyamide, avec de bonnes propriétés mécaniques, et d'autre part un bandage cylindrique de roulement recouvrant l'âme annulaire selon un interface commun, fait en une deuxième matière plastique élastomère, telle qu'un polyuréthanne. By way of nonlimiting example, and for the sole purpose of illustrating the invention, it is known to construct rollers comprising, on the one hand, an annular core or rim made of a first technical plastic material, such as a polyamide, with good mechanical properties, and on the other hand a cylindrical tread covering the annular core according to a common interface, made of a second elastomeric plastic material, such as a polyurethane.

Dans de nombreux cas, il est nécessaire de lier ou obtenir un accrochage effectif du premier élément sur le second, ou inversement, au niveau de l'interface commun de contact. Ainsi, en revenant aux galets de roulement envisagés précédemment, on recherche souvent une liaison adhérente du bandage sur la jante, par exemple pour éviter tout glissement en rotation entre la jante motrice et le bandage. In many cases, it is necessary to link or obtain an effective attachment of the first element to the second, or vice versa, at the level of the common contact interface. Thus, returning to the rollers envisaged previously, one often seeks an adherent connection of the tire on the rim, for example to avoid any sliding in rotation between the driving rim and the tire.

Jusqu'à présent, une telle liaison effective passe par la mise en oeuvre d'une autre matière plastique, telle qu'une colle, un adhésif, etc..., pour former un joint adhésif entre les deux éléments, donc une liaison adhérente indirecte entre ces derniers, selon la surface commune de contact. Up to now, such an effective connection requires the use of another plastic material, such as an adhesive, an adhesive, etc., to form an adhesive seal between the two elements, therefore an adhesive connection. indirect between them, according to the common contact surface.

Une telle solution présente divers inconvénients quant à sa mise en oeuvre:
- il faut tout d'abord trouver ou formuler un adhésif qui soit compatible avec les deux matières plastiques ; si ces dernières sont très différentes l'une de l'autre, au plan chimique ou physico-chimique, un tel adhésif peut ne pas exister
- toute technique de collage suppose une préparation soignée des surfaces à assembler, en termes de propreté, état de surface, etc..., donc des opérations et contrôles appropriés, en plus des étapes de fabrication proprement dites
- souvent une opération préalable au collage doit être faite, consistant à déposer sur l'une et éventuellement l'autre surface à assem bler, un primaire d'adhérence;
- la pièce finale ne peut de toute façon être obtenue directement, et passe par une opération d'assemblage.Such a solution has various drawbacks as to its implementation:
- first of all, an adhesive must be found or formulated which is compatible with the two plastics; if these are very different from each other, chemically or physico-chemically, such an adhesive may not exist
- any bonding technique requires careful preparation of the surfaces to be assembled, in terms of cleanliness, surface finish, etc., therefore appropriate operations and controls, in addition to the actual manufacturing steps
- often an operation prior to bonding must be made, consisting of depositing on one and possibly the other surface to be assembled, an adhesion primer;
- the final part cannot in any case be obtained directly, and goes through an assembly operation.

Bien entendu, des techniques telles que le surmoulage ou la bi-injection permettent d'obtenir directement deux éléments plastiques assemblés l'un sur l'autre, mais avec un interface commun sans liaison ou adhésion effective des matières plastiques en contact. Of course, techniques such as overmolding or bi-injection make it possible to directly obtain two plastic elements assembled one on the other, but with a common interface without bonding or effective adhesion of the plastics materials in contact.

Selon la présente invention, on a découvert un principe général d'obtention d'une liaison ou adhésion directe, selon une surface de contact commune d'assemblage, d'un premier élément en une première matière plastique, et d'un deuxième élément en une deuxième matière plastique. According to the present invention, a general principle has been discovered of obtaining a direct bond or adhesion, according to a common assembly contact surface, of a first element made of a first plastic material, and of a second element made of a second plastic material.

Ce principe consiste, en combinaison, à
- choisir au moins l'une de matières plastiques, parmi les mélanges ou alliages d'au moins deux polymères respectivement différents;
- choisir les deux matières plastiques l'une par rapport à l'autre, pour présenter au moins un composant commun, dit d'adhésion, c'est-àdire susceptible de diffuser à partir de la matière plastique le comprenant dans l'autre matière plastique, au travers de l'interface commun, à chaud, c'est-à-dire lorsque les deux éléments sont portés ensemble à une température au moins égale au plus bas point de fusion
- obtenir ainsi, par toute technique appropriée mettant les matières plastiques au contact l'une de l'autre, à chaud, une liaison adhérente directe d'assemblage des deux éléments.This principle consists, in combination, of
- choose at least one of plastics, from mixtures or alloys of at least two respectively different polymers;
- choose the two plastic materials relative to each other, to present at least one common component, called adhesion, that is to say capable of diffusing from the plastic material comprising it in the other material plastic, through the common interface, hot, that is to say when the two elements are brought together at a temperature at least equal to the lowest melting point
- Obtain thus, by any suitable technique bringing the plastics into contact with one another, when hot, a direct adhesive connection for assembling the two elements.

S'agissant de polymères, ou mélanges de polymères, par "point de fusion", on entend la zone de températures, limitée par une température inférieure et par une température supérieure, dans laquelle la matière plastique passe de sa zone élastique à sa zone d'écoulement, ces zones pouvant être matérialisées ou révélées, en suivant le module d'élasticité de ladite matière en fonction de la température. In the case of polymers, or mixtures of polymers, by "melting point" is meant the temperature zone, limited by a lower temperature and by a higher temperature, in which the plastic material passes from its elastic zone to its zone d flow, these areas can be materialized or revealed, following the modulus of elasticity of said material as a function of temperature.

Par "diffusion du composant commun d'adhésion; on entend une migration homogène de ce dernier, dans la masse de l'autre matière plastique en vis-à-vis, sans démixtion de cette dernière. By "diffusion of the common adhesion component, is meant a homogeneous migration of the latter, in the mass of the other plastic opposite, without demixing of the latter.

La propriété du composant commun d'adhésion, faisant partie de la présente invention, et consistant à diffuser de la matière plastique le comprenant, vers et dans l'autre matière plastique en vis-à-vis, peut être mise en évidence de manière simple, par des essais de routine.  The property of the common adhesion component, forming part of the present invention, and consisting in diffusing plastic material comprising it, towards and in the other plastic material opposite, can be demonstrated in a simple manner , through routine testing.

Après avoir dressé deux faces droites dans deux échantillons des deux matières plastiques respectivement, il suffit de mettre au contact l'une de l'autre les deux faces, pour obtenir un assemblage des deux échantil
Ions, puis de porter cet assemblage à une température au moins égale au plus bas point de fusion des matières plastiques en vis-à-vis, et après refroidissement de procéder à des essais traditionnels d'arrachement, normalisés par exemple. Au-delà d'une certaine force d'arrachement, les matières plastiques présentent la propriété recherchée, grâce au composant commun d'adhésion.After having drawn two straight faces in two samples of the two plastics respectively, it suffices to bring the two faces into contact with one another, to obtain an assembly of the two samples
Ions, then to bring this assembly to a temperature at least equal to the lowest melting point of the plastics opposite, and after cooling to carry out traditional pull-out tests, standardized for example. Beyond a certain tearing force, plastics have the desired property, thanks to the common adhesion component.

Le composant d'adhésion peut être un polymère. The adhesion component can be a polymer.

Suivant une possibilité, la première matière plastique est un alliage de polymères dont l'un constitue le composant d'adhésion précité, la deuxième matière plastique étant constituée pour l'essentiel par ce même polymère. According to one possibility, the first plastic material is an alloy of polymers, one of which constitutes the abovementioned adhesion component, the second plastic material consisting essentially of this same polymer.

Suivant une autre possibilité, la première et la seconde matières plastiques sont chacune un alliage de polymères, ces deux alliages présentant un polymère constitutif commun constituant le composant commun d'adhésion. According to another possibility, the first and second plastic materials are each an alloy of polymers, these two alloys having a common constituent polymer constituting the common adhesion component.

Dans une forme de réalisation préférée de l'invention, la première matière plastique est un mélange ou alliage de polypropylène et de polyamide, notamment vendu sous la dénomination "ORGALLOY R" par la Société ATOCHEM, et la deuxième matière plastique est un thermoplastique élastomère notamment vendu sous la dénomination "TEFABLOC" par la Société CO USIN-TESSIER, comprenant du polypropylène à titre de composant commun d'adhésion. In a preferred embodiment of the invention, the first plastic material is a mixture or alloy of polypropylene and polyamide, in particular sold under the name "ORGALLOY R" by the company ATOCHEM, and the second plastic material is a thermoplastic elastomer in particular sold under the name "TEFABLOC" by the company CO USIN-TESSIER, comprising polypropylene as a common adhesion component.

Selon une application particulière de l'invention dans la pièce, du type moyen de roulement, le premier élément consiste en une âme ou jante annulaire définissant, du côté extérieur un interface de contact cylindrique et le deuxième élément consiste en un bandage annulaire adhérant directement à l'âme annulaire selon ledit interface. According to a particular application of the invention in the workpiece, of the average rolling type, the first element consists of an annular core or rim defining, on the outside, a cylindrical contact interface and the second element consists of an annular band adhering directly to the annular core according to said interface.

Ainsi appliquée, l'invention permet l'obtention de moyens de roulement, notamment pour boggie de véhicule destiné à la manutention de charges lourdes et/ou volumineuses, ayant une liaison adhérente du bandage sur la jante évitant tout glissement en rotation entre la jante motrice et le bandage, et ce sans qu'il soit besoin de mettre en oeuvre une colle, un adhésif ou autre matière similaire pour assurer cette liaison. Thus applied, the invention makes it possible to obtain rolling means, in particular for a vehicle bogie intended for the handling of heavy and / or bulky loads, having an adherent connection of the tire on the rim preventing any sliding in rotation between the driving rim and the bandage, and this without the need to use an adhesive, an adhesive or other similar material to ensure this connection.

L'invention se rapporte également à un procédé pour l'obtention de la pièce multi-matière dont elle est. l'objet. The invention also relates to a method for obtaining the multi-material part of which it is. the object.

Selon une possibilité, dans un même moule, on bi-injecte la première matière plastique selon la forme du premier élément et la deuxième matière plastique selon la forme du deuxième élément. According to one possibility, in the same mold, the first plastic material is bi-injected according to the shape of the first element and the second plastic material according to the shape of the second element.

Selon une autre possibilité, on moule le premier élément dans la première matière plastique et on surmoule le deuxième élément sur le premier, porté au voisinage de la température de fusion de la deuxième matière plastique. According to another possibility, the first element is molded in the first plastic material and the second element is molded on the first, brought in the vicinity of the melting temperature of the second plastic material.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme de réalisation préférée de la pièce selon l'invention. In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended diagrammatic drawing representing, by way of nonlimiting example, a preferred embodiment of the part according to the invention.

Figure 1 est une vue en coupe de l'interface commun de deux éléments en matière plastique qui la constituent, assemblés l'un à l'autre
Figure 2 en est une vue dans un exemple d'application.Figure 1 is a sectional view of the common interface of two plastic elements which constitute it, assembled together
Figure 2 is a view in an example of application.

La figure 1 représente un premier élément 2, qui est une matière plastique constituée par un mélange ou alliage d'au moins deux polymères différents, et un deuxième élément 3 constitué pour l'essentiel par l'un des polymères constituant la matière de l'élément 2. FIG. 1 represents a first element 2, which is a plastic material constituted by a mixture or alloy of at least two different polymers, and a second element 3 constituted essentially by one of the polymers constituting the material of the item 2.

Ce polymère constitue un composant commun, dit "d'adhésion", c'est-à-dire susceptible de diffuser, à partir de la matière plastique de l'élément 2 ou 3 le comprenant dans la matière plastique de l'autre élément, respectivement 3 ou 2, avec laquelle elle est en contact, au travers de l'interface commun 4, à chaud, c'est-à-dire lorsque les matières constitutives des deux éléments 2 ou 3 sont portées ensemble à une température au moins égale au plus bas point de fusion de l'une d'elles. This polymer constitutes a common component, called "adhesion", that is to say capable of diffusing, from the plastic material of element 2 or 3 comprising it in the plastic material of the other element, respectively 3 or 2, with which it is in contact, through the common interface 4, hot, that is to say when the materials of the two elements 2 or 3 are brought together to a temperature at least equal at the lowest melting point of one of them.

Il est ainsi obtenu une liaison directe d'assemblage des deux éléments 2 et 3. A direct connection is thus obtained for assembling the two elements 2 and 3.

La figure 2 représente un exemple d'application de l'invention. FIG. 2 represents an example of application of the invention.

Elle représente une roue 10 de boggie d'un véhicule destiné à la manutention de charges lourdes et/ou volumineuses.It represents a bogie wheel 10 of a vehicle intended for handling heavy and / or bulky loads.

La roue 10 comprend une âme ou jante annulaire 20 réalisée par injection du produit vendu par la Société ATOCHEM sous la dénomination "ORGALLOY R", qui est un mélange ou alliage de polypropylène et de polyamide. The wheel 10 comprises an annular core or rim 20 produced by injection of the product sold by the company ATOCHEM under the name "ORGALLOY R", which is a mixture or alloy of polypropylene and polyamide.

L'âme 20 peut comprendre, venus de moulage avec elle-même, des logements de forme cylindrique ménagés dans ses parois latérales coaxialement à son axe de rotation, destinés à contenir des roulements à billes. The core 20 may comprise, coming from molding with itself, cylindrical-shaped housings formed in its side walls coaxial with its axis of rotation, intended to contain ball bearings.

L'âme 20 définit, du côté extérieur, un interface cylindrique 40 de contact avec un bandage annulaire 30, réalisé par injection autour de l'âme 20 du produit vendu par la Société COUSIN-TESSIER sous le nom de TEFABLOC, qui est un thermoplastique élastomère comprenant du polypropylène. The core 20 defines, on the outside, a cylindrical interface 40 for contact with an annular bandage 30, produced by injection around the core 20 of the product sold by the company COUSIN-TESSIER under the name of TEFABLOC, which is a thermoplastic elastomer comprising polypropylene.

Le polypropylène constitue le composant commun d'adhésion précité et rend possible, par sa diffusion d'une matière à l'autre, l'adhérence directe du bandage 30 sur l'âme 20.  Polypropylene constitutes the common adhesion component mentioned above and makes it possible, by its diffusion from one material to another, the direct adhesion of the bandage 30 to the core 20.

Claims (9)

REVENDICATIONS 1 - Pièce multi-matière constituée par l'assemblage d'au moins un premier élément en une première matière plastique présentant un premier point de fusion, et un deuxième élément en une deuxième matière plastique présentant un deuxième point de fusion, les deux éléments étant au contact l'un de l'autre selon un interface commun d'assemblage, caractérisée en ce qu'au moins l'une des matières plastiques est un mélange ou alliage d'au moins deux polymères respectivement différents, et les deux matières plastiques sont choisies l'une par rapport à l'autre pour présenter au moins un composant commun, dit d'adhésion, c'est-àdire susceptible de diffuser à partir de la matière plastique le comprenant dans l'autre matière plastique, au travers de l'interface (4,40) commun, à chaud, c'est-à-dire lorsque les deux éléments (2,3,20,30) sont portés ensemble à une température au moins égale au plus bas point de fusion, moyennant quoi l'interface commun (4,40) consiste en une liaison adhérente directe d'assemblage des deux éléments (2,3,20,30). 1 - Multi-material part constituted by the assembly of at least a first element in a first plastic material having a first melting point, and a second element in a second plastic material having a second melting point, the two elements being in contact with each other according to a common assembly interface, characterized in that at least one of the plastics is a mixture or alloy of at least two polymers respectively different, and the two plastics are chosen one with respect to the other to present at least one common component, called an adhesion component, that is to say capable of diffusing from the plastic material comprising it in the other plastic material, through the common interface (4.40), hot, that is to say when the two elements (2,3,20,30) are brought together to a temperature at least equal to the lowest melting point, whereby the common interface (4.40) co nsiste in a direct bonding connection of assembly of the two elements (2,3,20,30). 2 - Pièce selon la revendication 1, caractérisée en ce que le composant d'adhésion est un polymère. 2 - Piece according to claim 1, characterized in that the adhesion component is a polymer. 3 - Pièce selon la revendication 2, caractérisée en ce que la première matière plastique est un alliage de polymères dont l'un constitue le composant d'adhésion précité, la deuxième matière plastique étant constituée pour l'essentiel par ce même polymère. 3 - Part according to claim 2, characterized in that the first plastic material is an alloy of polymers, one of which constitutes the abovementioned adhesion component, the second plastic material consisting essentially of this same polymer. 4 - Pièce selon la revendication 2, caractérisée en ce que la première matière plastique et la seconde matière plastique sont chacune un alliage de polymère, ces deux alliages présentant un polymère constitutif commun constituant le composant commun d'adhésion. 4 - Part according to claim 2, characterized in that the first plastic material and the second plastic material are each a polymer alloy, these two alloys having a common constituent polymer constituting the common adhesion component. 5 - Pièce selon la revendication 4, caractérisée en ce que la première matière plastique est un mélange ou alliage de polypropylène et de polyamide, notamment celui vendu sous la dénomination "ORGAL 5 - Part according to claim 4, characterized in that the first plastic material is a mixture or alloy of polypropylene and polyamide, in particular that sold under the name "ORGAL LOY R" par la Société ATOCHEM, et la deuxième matière plastique est un thermoplastique élastomère, notamment celui vendu sous la dénomination "TEFABLOC", par la Société COUSIN-TESSIER comprenant du polypropylène à titre de composant commun d'adhésion.LOY R "by the company ATOCHEM, and the second plastic material is an elastomeric thermoplastic, in particular that sold under the name" TEFABLOC ", by the company COUSIN-TESSIER comprising polypropylene as a common adhesion component. 6 - Pièce selon l'une des revendications 1 à 5, du type moyen de roulement, caractérisée en ce que le premier élément (20) consiste en une âme ou jante annulaire, définissant du côté extérieur un interface (40) de contact cylindrique, et le deuxième élément (30) consiste en un bandage annulaire, adhérant directement à l'âme annulaire (20) selon ledit interface. 6 - Part according to one of claims 1 to 5, of the average rolling type, characterized in that the first element (20) consists of an annular core or rim, defining on the outside side an interface (40) of cylindrical contact, and the second element (30) consists of an annular bandage, adhering directly to the annular core (20) according to said interface. 7 - Pièce selon l'une des revendications 1 à 6, caractérisée en ce que l'âme (20) comprend, venus de moulage avec elle-même, des logements de forme cylindrique ménagés dans ses parois latérales coaxialement à son axe de rotation, destinés à contenir des roulements à billes. 7 - Part according to one of claims 1 to 6, characterized in that the core (20) comprises, coming from molding with itself, cylindrical housings formed in its side walls coaxially with its axis of rotation, intended to contain ball bearings. 8 - Procédé pour l'obtention d'une pièce selon l'une des revendications 1 à 7, caractérisé en ce que dans un même moule, on bi-injecte la première matière plastique, selon la forme du premier élément (2,20), et la deuxième matière plastique, selon la forme du deuxième élément (3,30). 8 - Method for obtaining a part according to one of claims 1 to 7, characterized in that in the same mold, the first plastic material is bi-injected, according to the shape of the first element (2,20) , and the second plastic material, according to the shape of the second element (3.30). 9 - Procédé pour l'obtention d'une pièce selon l'une des revendications 1 à 7, caractérisé en ce que l'on moule le premier élément (2,20) dans la première matière plastique, et on surmoule le deuxième élément (3,30) sur le premier (2,20), porté au voisinage de la température de fusion de la deuxième matière plastique.  9 - Process for obtaining a part according to one of claims 1 to 7, characterized in that the first element (2.20) is molded in the first plastic material, and the second element is molded ( 3.30) on the first (2.20), brought in the vicinity of the melting temperature of the second plastic material.
FR9009192A 1990-07-11 1990-07-11 Multi-material part and method for obtaining it Withdrawn FR2664531A1 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994006612A1 (en) * 1992-09-24 1994-03-31 H.B. Fuller Company Thermoplastic coated substrates
EP0595706A1 (en) * 1992-10-30 1994-05-04 Elf Atochem S.A. Laminates of a compatibilised polyamide/polyolefin blend and a tie layer, and articles therefrom
EP0673755A1 (en) * 1994-03-22 1995-09-27 Diehl Remscheid GmbH & Co. Connection of a thermoplastic elastomer with a hard plastic article
US5464585A (en) * 1994-01-03 1995-11-07 Metton America, Inc. Method of injection molding articles with selective concentrations or gradients of materials
US5562979A (en) * 1992-03-05 1996-10-08 Rover Group Limited Method of forming a moulding by dual injection and a moulding so formed
EP0693652A3 (en) * 1994-07-21 1996-10-23 Hitachi Metals Ltd Electric welding pipe joint
GB2300587A (en) * 1992-09-24 1996-11-13 Fuller H B Co Thermoplastic coated substrates
US5916468A (en) * 1996-07-08 1999-06-29 Hitachi Metals Ltd. Electrically weldable pipe joint and production method thereof
EP1333878A1 (en) * 2000-11-02 2003-08-13 Nike, Inc. Process for improving interfacial adhesion in a laminate

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GB942505A (en) * 1961-07-20 1963-11-20 Norddeutsche Kabelwerke Ag Welding an elastomer to a thermoplast
DE2236903A1 (en) * 1972-07-27 1974-03-28 Basf Ag LAMINATES

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GB942505A (en) * 1961-07-20 1963-11-20 Norddeutsche Kabelwerke Ag Welding an elastomer to a thermoplast
DE2236903A1 (en) * 1972-07-27 1974-03-28 Basf Ag LAMINATES

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5562979A (en) * 1992-03-05 1996-10-08 Rover Group Limited Method of forming a moulding by dual injection and a moulding so formed
GB2286795A (en) * 1992-09-24 1995-08-30 Fuller H B Co Thermoplastic coated substrates
GB2286795B (en) * 1992-09-24 1997-04-30 Fuller H B Co Coated Substrates
WO1994006612A1 (en) * 1992-09-24 1994-03-31 H.B. Fuller Company Thermoplastic coated substrates
GB2300587B (en) * 1992-09-24 1997-04-30 Fuller H B Co Coated Substrates
GB2300587A (en) * 1992-09-24 1996-11-13 Fuller H B Co Thermoplastic coated substrates
EP0595706A1 (en) * 1992-10-30 1994-05-04 Elf Atochem S.A. Laminates of a compatibilised polyamide/polyolefin blend and a tie layer, and articles therefrom
FR2697465A1 (en) * 1992-10-30 1994-05-06 Atochem Elf Sa Laminates based on polyamide / polyolefin alloys and coextrusion binders, objects obtained therefrom, coating methods therewith.
US5464585A (en) * 1994-01-03 1995-11-07 Metton America, Inc. Method of injection molding articles with selective concentrations or gradients of materials
EP0673755A1 (en) * 1994-03-22 1995-09-27 Diehl Remscheid GmbH & Co. Connection of a thermoplastic elastomer with a hard plastic article
EP0693652A3 (en) * 1994-07-21 1996-10-23 Hitachi Metals Ltd Electric welding pipe joint
US5618065A (en) * 1994-07-21 1997-04-08 Hitachi Metals, Ltd. Electric welding pipe joint having a two layer outer member
US5916468A (en) * 1996-07-08 1999-06-29 Hitachi Metals Ltd. Electrically weldable pipe joint and production method thereof
EP1333878A1 (en) * 2000-11-02 2003-08-13 Nike, Inc. Process for improving interfacial adhesion in a laminate
EP1333878A4 (en) * 2000-11-02 2008-03-19 Nike Inc Process for improving interfacial adhesion in a laminate

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