EP3212376A1 - Mould for producing a part made from plastic materials, comprising an optimized sealing system - Google Patents

Mould for producing a part made from plastic materials, comprising an optimized sealing system

Info

Publication number
EP3212376A1
EP3212376A1 EP15798504.5A EP15798504A EP3212376A1 EP 3212376 A1 EP3212376 A1 EP 3212376A1 EP 15798504 A EP15798504 A EP 15798504A EP 3212376 A1 EP3212376 A1 EP 3212376A1
Authority
EP
European Patent Office
Prior art keywords
mold
deformable
insert
sealing system
wall
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Withdrawn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
EP15798504.5A
Other languages
German (de)
French (fr)
Inventor
Olivier TORRES
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.)
Plastic Omnium SE
Original Assignee
Plastic Omnium SE
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 Plastic Omnium SE filed Critical Plastic Omnium SE
Publication of EP3212376A1 publication Critical patent/EP3212376A1/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Withdrawn legal-status Critical Current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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/3607—Moulds for making articles of definite length, i.e. discrete articles with sealing means or the like
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • B29C33/0044—Moulds or cores; Details thereof or accessories therefor with sealing means or the like for sealing off parts of inserts projecting into the mould cavity
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C2043/3272—Component parts, details or accessories; Auxiliary operations driving means
    • B29C2043/3283—Component parts, details or accessories; Auxiliary operations driving means for moving moulds or mould parts
    • 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
    • B29K2871/00—Use of polyethers, e.g. PEEK, i.e. polyether-etherketone or PEK, i.e. polyetherketone or derivatives thereof, as mould 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0046—Elastic

Definitions

  • the present invention relates to the technical field of manufacturing by molding plastic part, in particular by compression.
  • the invention relates to a mold adapted for the manufacture of composite parts requiring precise docking of the closure elements of the mold, such as parts comprising an insert or parts having a rough profile edge piece.
  • thermoplastic or thermosetting plastic material In order to produce a piece of thermoplastic or thermosetting plastic material, it is known to use a pressurized hot pressing molding process in a closed mold, generally by moving a movable member of the mold (set in motion by a press) relative to a fixed element of the mold, these elements being typically made of steel.
  • a loading plane consisting of sheets of plastic material, typically a composite material called "SMC", is placed in a compression mold.
  • SMC composite material
  • sheet molding compound sheet molding compound
  • sheet molding composite molding composite
  • This is for example a sheet consisting of thermosetting resin, generally polyester, vinylester or epoxy type, but possibly another type of thermosetting resin, which impregnates for example glass fibers or other reinforcement (for example with 20% to 30% reinforcing weight), often with fillers and / or catalyst (hardener).
  • the actuator of the press is actuated to close the mold and then transmit a molding pressure to the plastic material.
  • the molding of certain parts leads to docking defects of the mobile and fixed elements of the mold. These docking defects can lead to a resin infiltration causing burrs on the molded parts, not in a plane parallel to the closing direction of the mold, but in a perpendicular plane.
  • Such docking defects can occur for example with parts comprising an insert or parts having a rough profile on the workpiece (non-planar profile, embossed, with variable shapes).
  • the introduction of the insert in the mold, between two stacks of plastic sheets accentuates the infiltration of resin between the fixed and movable elements of the mold and around the insert during molding, which accentuates the presence of burrs on castings.
  • the insert is deformable, for example if the constituent material hardly withstands the closing pressure of the elements of the mold, and / or if the insert is hollow, then there is a problem of support of the steel constituting the fixed and movable elements of the mold. Indeed, we can not apply too much pressure with these parts at the risk of degrading the insert.
  • each insert produced in the chain does not exactly the same dimension, especially in the closing direction of the mold .
  • This overall shape defect to the piece of up to a few millimeters from one piece to another on large parts generates a not sufficiently tight docking of the fixed and movable elements of the mold.
  • a piece having a complicated profile on its edges or an insert leads to adjustment defects, generating burrs in a direction perpendicular to that of closing the mold.
  • the object of the invention is to overcome these disadvantages and to allow compression molding for molding a composite part comprising, for example, an insert, without docking defects.
  • the subject of the invention is in particular a mold for the manufacture of a plastic part, comprising a fixed element and a movable element forming, in the closed position of the mold, a cavity of the mold, in which at least one of the elements comprises at least one sealing system of the mold cavity.
  • This sealing system is provided with at least one deformable surface of elastic material for making a sealing contact with a closure surface (surface of an insert or surface of the mold elements) of the mold cavity.
  • the deformable surface is slidably mounted in a wall of the mold so as to adjust the sealing contact.
  • the deformable surface plays the role of sealing thanks, on the one hand to its elasticity that allows it to adapt to any shape of the closure surface, and thanks to its mobility, relative to the wall of the mold, which allows it to apply a pressure necessary for its elastic deformation and to reduce the clearance between the deformable surface and the closure surface.
  • This mobility of the sealing system relative to the wall of the mold is very advantageous for compression molds. Indeed, for this type of mold, it is necessary to seal before putting the plastic in compression, because during compression, the plastic flue, and could escape the cavity.
  • the mold according to the invention thus makes it possible to improve the sealing at the level of an insert for example, which avoids the recovery of burrs after molding.
  • the elastic material may comprise at least one polymer from the group consisting of a polyetheretherketone, called PEEK.
  • the deformable surface is movable in translation parallel to a closing direction of the mold.
  • the sealing system may comprise a means for moving the deformable surface in the wall, adapted to press the surface against the closure surface so as to constitute a force against reaction to a force exerted by the mobile element during a compression phase of the plastic material.
  • This moving means can be a hydraulic cylinder.
  • the deformable surface has a shape complementary to the surface of the closure surface in contact with said deformable surface.
  • the sealing system is provided with at least two deformable surfaces, one surface being slidably mounted in one wall of the fixed element and the other surface being slidably mounted in a wall of the movable element. both surfaces cooperating to prevent the plastic from flowing out of the mold cavity.
  • one of the surfaces can be fixedly mounted in the wall.
  • the invention also relates to a method of overmolding an insert with a plastic material by means of a mold according to the invention, in which at least one surface of the insert is used as a closure surface.
  • FIG. 1 schematically shows a mold according to a first embodiment of the invention, in the open position at the top and in the closed position at the bottom;
  • FIGS. 2A, 2B and 2C schematically show the mold according to the first embodiment of the invention, with placement of the insert (FIG. 2A), closure of the mold (FIG. 2B), and compression phase (FIG. Figure 2C).
  • Figure 3 shows schematically a mold according to a second embodiment of the invention, in the open position upwards, and with placing the insert at the bottom.
  • FIG. 4 illustrates an embodiment in which the support of the deformable surface on the closure surface is partial.
  • Figure 1 shows an example of mold (1) according to the invention, for the manufacture of plastic part (MP).
  • the mold (1) comprises a first element (2), preferably fixed, and a second element (3), preferably movable and movable in a closed direction of the mold.
  • the two elements (2, 3) abut one against the other, directly or via a member, in the closed position of the mold (1), and they form the cavity of the mold (4).
  • the two elements (2, 3) abut against an insert (9), defining the overmolding cavity of the insert (9).
  • FIG. 2A illustrates the mold (1) during the step of depositing an insert (9), metal or composite, and plastic sheets (MP) type SMC in the mold (1).
  • One of the elements (2, 3) of the mold (1) comprises at least one sealing system (5) of the mold cavity (4) so as to prevent the plastic material (MP) from flowing out of the cavity (4), between the first element (2) and the second element (3) (in the case of Figure 1).
  • This sealing system (5) comprises at least one block of elastic material provided with a deformable surface (6) for making a sealing contact with a closure surface of the mold cavity (4).
  • elastic material is meant a material capable of accepting a residual reversible deformation of 0.1 mm, at least at the usual molding pressures and temperatures (a pressure around 100 bar and a temperature around 150 ° C).
  • This deformable surface (6) of elastic material is slidably mounted in a wall (7) of the mold (1).
  • the deformable surface (6) is displaceable in translation parallel to the closing direction of the mold (1).
  • the deformable surface (6) plays the role of sealing thanks, on the one hand to its elasticity that allows it to adapt to any shape of the closure surface, and thanks to its mobility that allows to apply a pressure necessary for its elastic deformation and to reduce the clearance between the deformable surface (6) and the closure surface.
  • the closure surface may be the surface of one of the elements (2,3) of the mold or the surface of an insert (9) as illustrated in FIGS. 2A to 2C and 4.
  • the support of the deformable surface (6 ) on the closure surface may be partial as illustrated in Figure 4, that is to say that only a portion of the deformable surface (6) is in contact with the closure surface.
  • the other part can be in direct contact with the plastic material (MP).
  • the elastic material of the deformable surface (6) comprises at least one or more polymer (s) of the group formed by a polyetheretherketone, said PEEK.
  • this PEEK material there are different grades of this PEEK material. To avoid burrs in a direction perpendicular to that of closing the mold, and especially between the surface (6) and the closure surface, the skilled person will choose, depending on the materials used, pressures and temperatures set implemented, the grade of PEEK allowing deformations of the thickness of the surface (6), in the direction of closure of the mold, of the order of 0.1 mm, to allow an adjustment inducing a seal between the elements closing the cavity of the mold (4).
  • the elastic material may also comprise, alone or in combination, Teflon® PFA (PTFE), VITON® (synthetic rubber of the family of fluorinated elastomers.
  • Teflon® PFA PTFE
  • VITON® synthetic rubber of the family of fluorinated elastomers.
  • the elastic material may also include other components.
  • the elastic material may comprise at least 65% by weight, and preferably at least 90% by weight of one or more polymer (s) of the group consisting of a polyetheretherketone, called PEEK, a polyimide, called PI, a polyamide-imide, called PAI, and a polysulfide of phenylene, called PPS, and VITON®.
  • the deformable surface (6) can be in direct contact with the plastics material (MP).
  • the deformable surface (6) preferably has a shape complementary to the closure surface, such as the insert (9), in contact with the deformable surface (6). As illustrated in Figures 3 and 4, regardless of the shape of the insert (9), the surface (6) provides an optimal seal.
  • the sealing system (5) comprises blocks of elastic material provided with a deformable surface (6), each block being housed by interlocking in a support (6 ' ).
  • This support (6 ') thus carrying the deformable surface (6), ensures a frank contact with the closure surface, such as the outer surface of the insert (9).
  • One or more blocks of elastic material may be implanted in the mold (1). They are preferably placed in the upper and lower part of the mold, that is to say on the fixed element (2) and on the movable element (3).
  • the sealing system (5) is provided with at least two deformable surfaces (6).
  • a deformable surface is slidably mounted in the wall (7) of the fixed element (2) and the other deformable surface is slidably mounted in a wall (7) of the movable element (3).
  • the two deformable surfaces (6) in contact with the insert (9) cooperate to prevent the plastic (MP) from flowing out of the cavity of the mold (4). They are thus vis-à-vis, as shown in Figures 1 and 2A to 2C, to create an optimal seal before the start of compression.
  • the sealing system (5) comprises a means (8) for moving the deformable surface (6) in the wall (7).
  • This system makes it possible to press the deformable surface (6) against the closure surface, such as the insert (9), so as to constitute a force against the force exerted by the movable element (3) during the compression phase of the plastics material (MP).
  • Figure 2C illustrates the forces involved during the compression phase.
  • the deformable surfaces (6), via the supports (6 ') are servocontrolled by hydraulic cylinders (8) in order to create an optimal seal before the beginning of the compression .
  • the sealing system (5) is provided with at least two deformable surfaces (6), a deformable surface being slidably mounted in a wall (7) of one element (2, 3) and the other deformable surface being fixedly mounted in the wall (7) of the other element (3, 2).
  • the two deformable surfaces in contact with the closure surface, such as the insert (9), cooperate to prevent the plastic (MP) from flowing out of the cavity of the mold (4). They are thus vis-à-vis, as shown in Figures 3 and 4, to create an optimal seal before the start of compression.
  • the invention also relates to a method of overmolding an insert with a plastic material by means of a mold (1) according to the invention.
  • the method comprises at least the following steps according to the example of FIGS. 1 and 2A to 2C:
  • the insert (9) to be molded is positioned with the plastic material (MP) on the blocks of elastic material, provided with a deformable surface (6), the punch (2) in the up position (in the case of an overmoulding on two sides).
  • the press (3) is closed until the deformable surfaces (6) of the upper part are in contact with the insert (9).
  • the plastic (MP) is not yet compressed, but the end zone is sealed.
  • the press (3) continues to be lowered to the nominal side of the molding, and a pressure is applied to flow and polymerize the plastic (MP).
  • the deformable surfaces (6) are always in pressure on the insert
  • the press (3) opens and the transformed part is ejected.
  • deformable surfaces (6) in the upper and lower part can help the ejection of the part on its periphery.

Abstract

The application relates to a mould (1) for producing a part made from plastic material (MP), comprising a fixed element (2) and a moving element (3) forming a mould cavity (4) in the closed position of the mould (1), characterized in that at least one of the elements comprises a sealing system (5) of the mould cavity (4), said sealing system (5) being provided with at least one deformable surface (6) made from elastic material enabling realization of a sealing contact having a closure surface of the mould cavity (4), and said deformable surface (6) being mounted to slide in a wall (7) of the mould (1) in such a way as to adjust the sealing contact.

Description

Moule pour la fabrication de pièce en matière plastique comportant un système d'étanchéité optimisé  Mold for the manufacture of plastic parts having an optimized sealing system
La présente invention concerne le domaine technique de la fabrication par moulage de pièce en matière plastique, notamment par compression. The present invention relates to the technical field of manufacturing by molding plastic part, in particular by compression.
En particulier, l'invention concerne un moule adapté pour la fabrication de pièces composites nécessitant un accostage précis des éléments de fermeture du moule, telles que des pièces comportant un insert ou des pièces ayant un profil accidenté en bord pièce.  In particular, the invention relates to a mold adapted for the manufacture of composite parts requiring precise docking of the closure elements of the mold, such as parts comprising an insert or parts having a rough profile edge piece.
Pour réaliser une pièce en matière plastique, thermoplastique ou thermodurcissable, il est connu d'utiliser un procédé de moulage par compression à chaud sous pression dans un moule fermé, en général par déplacement d'un élément mobile du moule (mis en mouvement par une presse) par rapport à un élément fixe du moule, ces éléments étant typiquement en acier.  In order to produce a piece of thermoplastic or thermosetting plastic material, it is known to use a pressurized hot pressing molding process in a closed mold, generally by moving a movable member of the mold (set in motion by a press) relative to a fixed element of the mold, these elements being typically made of steel.
Généralement, on pose dans un moule de compression un plan de chargement constitué de feuilles de matière plastique, typiquement un matériau composite dit «SMC». Ce sigle provient de l'appellation en langue anglaise «sheet moulding compound» (moulage d'un composé en feuille) ou «sheet moulding composite» (moulage d'un composite en feuille). Il s'agit par exemple d'une feuille constituée de résine thermodurcissable, généralement de type polyester, vinylester, ou époxy, mais éventuellement d'un autre type de résine thermodurcissable, qui imprègne par exemple des fibres de verre ou d'un autre renfort (par exemple avec 20% à 30% poids de renfort), avec souvent des charges et/ou un catalyseur (durcisseur).  Generally, a loading plane consisting of sheets of plastic material, typically a composite material called "SMC", is placed in a compression mold. This acronym comes from the English name sheet molding compound (sheet molding compound) or sheet molding composite (molding a composite sheet). This is for example a sheet consisting of thermosetting resin, generally polyester, vinylester or epoxy type, but possibly another type of thermosetting resin, which impregnates for example glass fibers or other reinforcement (for example with 20% to 30% reinforcing weight), often with fillers and / or catalyst (hardener).
Puis on actionne le vérin de la presse pour fermer le moule puis transmettre une pression de moulage à la matière plastique.  Then the actuator of the press is actuated to close the mold and then transmit a molding pressure to the plastic material.
Du fait du déplacement relatif à chaud des différents éléments du moule, il n'est guère possible de laisser un jeu fonctionnel suffisamment faible entre l'élément mobile et l'élément fixe du moule pour assurer l'étanchéité entre ces deux éléments, du fait notamment des contraintes de montage du moule, qui imposent, dans l'état de la technique, d'assurer un jeu de montage non nul à la température ambiante, permettant d'assurer également le mouvement relatif des éléments du moule, sans blocage. Ce jeu de montage reste sensiblement identique lorsque le moule est porté à la température de moulage, proche typiquement de 150°C. La maîtrise du jeu est d'autant plus important que les pièces à mouler sont de grandes dimensions.  Due to the relative hot displacement of the various elements of the mold, it is hardly possible to leave a sufficiently weak functional gap between the movable element and the fixed element of the mold to ensure the seal between these two elements, because in particular, the assembly constraints of the mold, which require, in the state of the art, to ensure a non-zero mounting clearance at room temperature, also ensuring the relative movement of the mold elements, without blocking. This mounting clearance remains substantially identical when the mold is brought to the molding temperature, typically close to 150 ° C. The control of the game is all the more important as the pieces to be molded are large.
Il en résulte une infiltration de résine, devenue fluide sous l'effet des conditions thermodynamiques dans la cavité de moulage, dans les éléments fixe et mobile du moule lors du moulage, ce qui conduit à la présence de bavures sur les pièces moulées, typiquement dans un plan parallèle à la direction de fermeture du moule, très généralement verticale. Ces bavures, outre la perte de matière correspondante, génèrent des coûts élevés lors de l'opération ultérieure d'ébavurage, qui requiert un temps notable pour l'opérateur en charge de cette opération. This results in an infiltration of resin, which has become fluid under the effect of thermodynamic conditions in the molding cavity, in the fixed and movable elements of the mold during molding, which leads to the presence of burrs on the parts. molded, typically in a plane parallel to the direction of closure of the mold, very generally vertical. These burrs, in addition to the corresponding loss of material, generate high costs during the subsequent deburring operation, which requires a significant time for the operator in charge of this operation.
II a également déjà été proposé, dans la demande WO2014091175, de réaliser des moules de compression comprenant des pièces d'étanchéité mobiles, ou cales mobiles, différentes de l'élément mobile principal du moule, disposées dans un ou plusieurs logements ménagé(s) dans un élément fixe du moule. Ces pièces d'étanchéité sont conçues pour se dilater et plaquer des pièces en acier les unes contre les autres de façon à assurer l'étanchéité. Cette option technique ne résout cependant pas le problème de façon satisfaisante, ces cales devant également être montées avec un jeu de montage et de fonctionnement générant des bavures.  It has also already been proposed, in the application WO2014091175, to produce compression molds comprising movable sealing pieces, or movable wedges, different from the main movable element of the mold, arranged in one or more housings (s) in a fixed element of the mold. These sealing pieces are designed to expand and press steel parts against each other to seal. This technical option, however, does not solve the problem satisfactorily, these shims must also be mounted with a set of mounting and operating generating burrs.
De plus, le moulage de certaines pièces conduit à des défauts d'accostage des éléments mobile et fixe du moule. Ces défauts d'accostage peuvent conduire à une infiltration de résine provoquant des bavures sur les pièces moulées, non dans un plan parallèle à la direction de fermeture du moule, mais dans un plan perpendiculaire.  In addition, the molding of certain parts leads to docking defects of the mobile and fixed elements of the mold. These docking defects can lead to a resin infiltration causing burrs on the molded parts, not in a plane parallel to the closing direction of the mold, but in a perpendicular plane.
De tels défauts d'accostage peuvent se produire par exemple avec des pièces comportant un insert ou des pièces ayant un profil accidenté en bord pièce (profil non plan, bosselé, comportant des formes variables).  Such docking defects can occur for example with parts comprising an insert or parts having a rough profile on the workpiece (non-planar profile, embossed, with variable shapes).
En effet, la mise en place de l'insert dans le moule, entre deux empilements de feuilles de matière plastique, accentue l'infiltration de résine entre les éléments fixe et mobile du moule et autour de l'insert lors du moulage, ce qui accentue la présence de bavures sur les pièces moulées. Par ailleurs, si l'insert est déformable, par exemple si la matière le constituant résiste peu à la pression de fermeture des éléments du moule, et/ou si l'insert est creux, alors on rencontre un problème d'appui de l'acier constituant les éléments fixe et mobile du moule. En effet, on ne peut appliquer une trop forte pression avec ces pièces au risque de dégrader l'insert.  Indeed, the introduction of the insert in the mold, between two stacks of plastic sheets, accentuates the infiltration of resin between the fixed and movable elements of the mold and around the insert during molding, which accentuates the presence of burrs on castings. Moreover, if the insert is deformable, for example if the constituent material hardly withstands the closing pressure of the elements of the mold, and / or if the insert is hollow, then there is a problem of support of the steel constituting the fixed and movable elements of the mold. Indeed, we can not apply too much pressure with these parts at the risk of degrading the insert.
De plus, lors de la fabrication d'un insert, il existe une dispersion dimensionnelle des pièces, c'est-à-dire que chaque insert produit à la chaîne ne fait pas exactement la même dimension, notamment dans la direction de fermeture du moule. Ce défaut de forme global à la pièce pouvant aller jusqu'à quelques millimètres d'une pièce à une autre sur des pièces de grandes dimensions, engendre un accostage pas suffisamment étanche des éléments fixe et mobile du moule.  In addition, during the manufacture of an insert, there is a dimensional dispersion of the parts, that is to say that each insert produced in the chain does not exactly the same dimension, especially in the closing direction of the mold . This overall shape defect to the piece of up to a few millimeters from one piece to another on large parts, generates a not sufficiently tight docking of the fixed and movable elements of the mold.
De tels défauts d'accostage peuvent se produire également avec des pièces comportant un profil accidenté en bord pièce, c'est-à-dire que le contour de la pièce n'est pas plan, mais comporte des formes en relief dans la direction de fermeture du moule. Dans ce cas, les deux pièces du moule (fixe et mobile) doivent parfaitement s'emboiter lors de la fermeture du moule. Si un tel moule peut être fabriqué, il est en revanche extrêmement difficile d'assurer un emboîtement parfait des formes des éléments fixes et mobiles du moule. En effet, l'ajustement de ces éléments, généralement en acier, demande une précision trop importante par rapport à celle de l'outil. Such docking defects can also occur with parts having a rough profile at the workpiece edge, that is, the outline of the workpiece is not planar but has raised shapes in the direction of the workpiece. closing the mold. In this case, both mold parts (fixed and mobile) must be perfectly nest when closing the mold. If such a mold can be manufactured, on the other hand, it is extremely difficult to ensure a perfect interlocking of the shapes of the fixed and moving elements of the mold. Indeed, the adjustment of these elements, usually made of steel, requires too much precision compared to that of the tool.
Ainsi, une pièce comportant un profil compliqué sur ses bords ou un insert, conduit à des défauts d'ajustement, engendrant des bavures dans une direction perpendiculaire à celle de fermeture du moule.  Thus, a piece having a complicated profile on its edges or an insert, leads to adjustment defects, generating burrs in a direction perpendicular to that of closing the mold.
Ces bavures sont aujourd'hui difficiles à enlever et pénalisent la production de ce type de pièce (avec insert, à profil accidenté) car elles nécessitent une opération d'ébavurage après moulage.  These burrs are today difficult to remove and penalize the production of this type of part (with insert, accidental profile) because they require deburring operation after molding.
Les solutions d'étanchéité existantes actuellement ne prennent pas en compte ce type de bavure, et notamment le surmoulage d'un insert dans le moule, et ne permettent donc pas d'éviter les bavures autour d'un insert. L'invention a pour but de remédier à ces inconvénients et de permettre un moulage par compression permettant de mouler une pièce composite comprenant par exemple un insert, sans défaut d'accostage.  Current sealing solutions do not take into account this type of burr, and in particular the overmoulding of an insert in the mold, and therefore do not prevent burrs around an insert. The object of the invention is to overcome these disadvantages and to allow compression molding for molding a composite part comprising, for example, an insert, without docking defects.
A cet effet, l'invention a notamment pour objet un moule pour la fabrication de pièce en matière plastique, comportant un élément fixe et un élément mobile formant, en position fermée du moule, une cavité du moule, dans lequel au moins un des éléments comporte au moins un système de fermeture étanche de la cavité du moule. Ce système de fermeture étanche est muni d'au moins une surface déformable en matériau élastique permettant de réaliser un contact étanche avec une surface de fermeture (surface d'un insert ou surface des éléments du moule) de la cavité du moule. De plus, la surface déformable est montée coulissante dans une paroi du moule de façon à ajuster le contact étanche.  For this purpose, the subject of the invention is in particular a mold for the manufacture of a plastic part, comprising a fixed element and a movable element forming, in the closed position of the mold, a cavity of the mold, in which at least one of the elements comprises at least one sealing system of the mold cavity. This sealing system is provided with at least one deformable surface of elastic material for making a sealing contact with a closure surface (surface of an insert or surface of the mold elements) of the mold cavity. In addition, the deformable surface is slidably mounted in a wall of the mold so as to adjust the sealing contact.
Ainsi, la surface déformable joue le rôle d'étanchéité grâce, d'une part à son élasticité qui lui permet de s'adapter à toute forme de la surface de fermeture, et grâce à sa mobilité, par rapport à la paroi du moule, qui lui permet d'appliquer une pression nécessaire à sa déformation élastique et à réduire le jeu entre la surface déformable et la surface de fermeture. Cette mobilité du système d'étanchéité par rapport à la paroi du moule est très avantageuse pour des moules de compression. En effet, pour ce type de moule, il est nécessaire d'assurer l'étanchéité avant de mettre la matière plastique en compression, car lors de la compression, la matière plastique flue, et pourrait donc s'échapper de la cavité.  Thus, the deformable surface plays the role of sealing thanks, on the one hand to its elasticity that allows it to adapt to any shape of the closure surface, and thanks to its mobility, relative to the wall of the mold, which allows it to apply a pressure necessary for its elastic deformation and to reduce the clearance between the deformable surface and the closure surface. This mobility of the sealing system relative to the wall of the mold is very advantageous for compression molds. Indeed, for this type of mold, it is necessary to seal before putting the plastic in compression, because during compression, the plastic flue, and could escape the cavity.
Le moule selon l'invention permet ainsi d'améliorer l'étanchéité au niveau d'un insert par exemple, ce qui évite les reprises de bavures après moulage. Selon l'invention, le matériau élastique peut comprendre au moins un polymère du groupe formé par une polyétheréthercétone, dit PEEK. The mold according to the invention thus makes it possible to improve the sealing at the level of an insert for example, which avoids the recovery of burrs after molding. According to the invention, the elastic material may comprise at least one polymer from the group consisting of a polyetheretherketone, called PEEK.
De préférence, la surface déformable est déplaçable en translation parallèlement à une direction de fermeture du moule.  Preferably, the deformable surface is movable in translation parallel to a closing direction of the mold.
Selon l'invention, le système d'étanchéité peut comporter un moyen de déplacement de la surface déformable dans la paroi, adapté à plaquer la surface contre la surface de fermeture de façon à constituer une force de contre réaction à un effort exercé par l'élément mobile lors d'une phase de compression de la matière plastique. Ce moyen de déplacement peut être un vérin hydraulique.  According to the invention, the sealing system may comprise a means for moving the deformable surface in the wall, adapted to press the surface against the closure surface so as to constitute a force against reaction to a force exerted by the mobile element during a compression phase of the plastic material. This moving means can be a hydraulic cylinder.
Selon un mode de réalisation, la surface déformable a une forme complémentaire de la surface de la surface de fermeture en contact avec ladite surface déformable.  According to one embodiment, the deformable surface has a shape complementary to the surface of the closure surface in contact with said deformable surface.
Selon un mode de réalisation, le système d'étanchéité est muni d'au moins deux surfaces déformables, une surface étant montée coulissante dans une paroi de l'élément fixe et l'autre surface étant montée coulissante dans une paroi de l'élément mobile, les deux surfaces coopérant afin d'éviter que la matière plastique ne flue en dehors de la cavité du moule.  According to one embodiment, the sealing system is provided with at least two deformable surfaces, one surface being slidably mounted in one wall of the fixed element and the other surface being slidably mounted in a wall of the movable element. both surfaces cooperating to prevent the plastic from flowing out of the mold cavity.
Selon ce mode de réalisation, l'une des surfaces peut être montée fixe dans la paroi. According to this embodiment, one of the surfaces can be fixedly mounted in the wall.
L'invention concerne également un procédé de surmoulage d'un insert par une matière plastique au moyen d'un moule selon l'invention, dans lequel on utilise au moins une surface de l'insert comme surface de fermeture. The invention also relates to a method of overmolding an insert with a plastic material by means of a mold according to the invention, in which at least one surface of the insert is used as a closure surface.
L'invention sera mieux comprise à la lecture des figures annexées, qui sont fournies à titre d'exemples et ne présentent aucun caractère limitatif, dans lesquelles:  The invention will be better understood on reading the appended figures, which are provided by way of examples and are in no way limiting, in which:
La figure 1 montre schématiquement un moule selon un premier mode de réalisation de l'invention, en position ouverte en haut et en position fermée en bas ;  FIG. 1 schematically shows a mold according to a first embodiment of the invention, in the open position at the top and in the closed position at the bottom;
Les figures 2A, 2B et 2C montrent schématiquement le moule selon le premier mode de réalisation de l'invention, avec mise en place de l'insert (figure 2A), la fermeture du moule (figure 2B), et en phase de compression (figure 2C).  FIGS. 2A, 2B and 2C schematically show the mold according to the first embodiment of the invention, with placement of the insert (FIG. 2A), closure of the mold (FIG. 2B), and compression phase (FIG. Figure 2C).
La figure 3 montre schématiquement un moule selon un second mode de réalisation de l'invention, en position ouverte en haut en haut, et avec mise ne place de l'insert en en bas.  Figure 3 shows schematically a mold according to a second embodiment of the invention, in the open position upwards, and with placing the insert at the bottom.
La figure 4 illustre un mode de réalisation dans lequel l'appui de la surface déformable sur la surface de fermeture est partiel.  FIG. 4 illustrates an embodiment in which the support of the deformable surface on the closure surface is partial.
On se réfère maintenant à la figure 1 , qui montre un exemple de moule (1 ) selon l'invention, pour la fabrication de pièce en matière plastique (MP).  Referring now to Figure 1, which shows an example of mold (1) according to the invention, for the manufacture of plastic part (MP).
Le moule (1 ) comprend un premier élément (2), de préférence fixe, et un second élément (3), de préférence mobile et déplaçable selon une direction de fermeture du moule. Les deux éléments (2, 3) viennent en butée l'un contre l'autre, directement ou par l'intermédiaire d'un organe, en position fermée du moule (1 ), et ils forment la cavité du moule (4). Selon l'exemple des figures 2A à 2C, les deux éléments (2, 3) viennent en butée contre un insert (9), définissant la cavité de surmoulage de l'insert (9). La figure 2A illustre le moule (1 ) lors de l'étape de dépose d'un insert (9), métallique ou composite, et de feuilles de matière plastique (MP) type SMC dans le moule (1 ). The mold (1) comprises a first element (2), preferably fixed, and a second element (3), preferably movable and movable in a closed direction of the mold. The two elements (2, 3) abut one against the other, directly or via a member, in the closed position of the mold (1), and they form the cavity of the mold (4). According to the example of FIGS. 2A to 2C, the two elements (2, 3) abut against an insert (9), defining the overmolding cavity of the insert (9). FIG. 2A illustrates the mold (1) during the step of depositing an insert (9), metal or composite, and plastic sheets (MP) type SMC in the mold (1).
Un des éléments (2, 3) du moule (1 ) comporte au moins un système d'étanchéité (5) de la cavité du moule (4) de façon à éviter que la matière plastique (MP) ne flue en dehors de la cavité (4), entre le premier élément (2) et le second élément (3) (dans le cas de la figure 1 ). Ce système d'étanchéité (5) comporte au moins un bloc en matériau élastique muni d'une surface déformable (6) permettant de réaliser un contact étanche avec une surface de fermeture de la cavité du moule (4). On entend par matériau élastique un matériau capable d'accepter une déformation réversible résiduelle de 0,1 mm, au moins aux pressions et températures habituelles de moulage (une pression autours de 100 bars et une température autours de 150°C). Cette surface déformable (6) en matériau élastique est montée coulissante dans une paroi (7) du moule (1 ). De préférence, la surface déformable (6) est déplaçable en translation parallèlement à la direction de fermeture du moule (1 ).  One of the elements (2, 3) of the mold (1) comprises at least one sealing system (5) of the mold cavity (4) so as to prevent the plastic material (MP) from flowing out of the cavity (4), between the first element (2) and the second element (3) (in the case of Figure 1). This sealing system (5) comprises at least one block of elastic material provided with a deformable surface (6) for making a sealing contact with a closure surface of the mold cavity (4). By elastic material is meant a material capable of accepting a residual reversible deformation of 0.1 mm, at least at the usual molding pressures and temperatures (a pressure around 100 bar and a temperature around 150 ° C). This deformable surface (6) of elastic material is slidably mounted in a wall (7) of the mold (1). Preferably, the deformable surface (6) is displaceable in translation parallel to the closing direction of the mold (1).
Ainsi, la surface déformable (6) joue le rôle d'étanchéité grâce, d'une part à son élasticité qui lui permet de s'adapter à toute forme de la surface de fermeture, et grâce à sa mobilité qui permet de lui appliquer une pression nécessaire à sa déformation élastique et à réduire le jeu entre la surface déformable (6) et la surface de fermeture.  Thus, the deformable surface (6) plays the role of sealing thanks, on the one hand to its elasticity that allows it to adapt to any shape of the closure surface, and thanks to its mobility that allows to apply a pressure necessary for its elastic deformation and to reduce the clearance between the deformable surface (6) and the closure surface.
La surface de fermeture peut être la surface d'un des éléments (2,3) du moule ou la surface d'un insert (9) comme illustrées sur les figures 2A à 2C et 4. L'appui de la surface déformable (6) sur la surface de fermeture peut être partiel comme l'illustre la figure 4, c'est-à-dire qu'une partie seulement de la surface déformable (6) est en contact avec la surface de fermeture. L'autre partie pouvant être en contact direct avec la matière plastique (MP).  The closure surface may be the surface of one of the elements (2,3) of the mold or the surface of an insert (9) as illustrated in FIGS. 2A to 2C and 4. The support of the deformable surface (6 ) on the closure surface may be partial as illustrated in Figure 4, that is to say that only a portion of the deformable surface (6) is in contact with the closure surface. The other part can be in direct contact with the plastic material (MP).
Selon un exemple de réalisation, le matériau élastique de la surface déformable (6) comprend au moins un ou plusieurs polymère(s) du groupe formé par une polyétheréthercétone, dit PEEK.  According to an exemplary embodiment, the elastic material of the deformable surface (6) comprises at least one or more polymer (s) of the group formed by a polyetheretherketone, said PEEK.
Il existe différents grades de ce matériau PEEK. Pour éviter des bavures dans une direction perpendiculaire à celle de fermeture du moule, et notamment entre la surface (6) et la surface de fermeture, l'homme du métier choisira, en fonction des matériaux mis en œuvre, des pressions et des températures mises en œuvre, le grade de PEEK permettant des déformations de l'épaisseur de la surface (6), dans le sens de fermeture du moule, de l'ordre de 0,1 mm, pour permettre un ajustement induisant une étanchéité entre les éléments fermant la cavité du moule (4). There are different grades of this PEEK material. To avoid burrs in a direction perpendicular to that of closing the mold, and especially between the surface (6) and the closure surface, the skilled person will choose, depending on the materials used, pressures and temperatures set implemented, the grade of PEEK allowing deformations of the thickness of the surface (6), in the direction of closure of the mold, of the order of 0.1 mm, to allow an adjustment inducing a seal between the elements closing the cavity of the mold (4).
Le matériau élastique peut également comprendre seul, ou en combinaison, du Téflon® PFA (PTFE), du VITON ® (caoutchouc synthétique de la famille des élastomères fluorés.  The elastic material may also comprise, alone or in combination, Teflon® PFA (PTFE), VITON® (synthetic rubber of the family of fluorinated elastomers.
Le matériau élastique peut également comprendre d'autres composants. Par exemple, le matériau élastique peut comprendre au moins 65% en poids, et de préférence au moins 90% en poids d'un ou plusieurs polymère(s) du groupe formé par une polyétheréthercétone, dit PEEK, un polyimide, dit PI, un polyamide-imide, dit PAI, et un polysulfure de phénylène, dit PPS, et du VITON ®.  The elastic material may also include other components. For example, the elastic material may comprise at least 65% by weight, and preferably at least 90% by weight of one or more polymer (s) of the group consisting of a polyetheretherketone, called PEEK, a polyimide, called PI, a polyamide-imide, called PAI, and a polysulfide of phenylene, called PPS, and VITON®.
Selon l'invention, la surface déformable (6) peut être en contact direct avec la matière plastique (MP).  According to the invention, the deformable surface (6) can be in direct contact with the plastics material (MP).
La surface déformable (6) a de préférence une forme complémentaire de la surface de fermeture, telle que l'insert (9), en contact avec la surface déformable (6). Comme l'illustrent les figures 3 et 4, quelle que soit la forme de l'insert (9), la surface (6) permet une étanchéité optimale.  The deformable surface (6) preferably has a shape complementary to the closure surface, such as the insert (9), in contact with the deformable surface (6). As illustrated in Figures 3 and 4, regardless of the shape of the insert (9), the surface (6) provides an optimal seal.
Selon l'exemple de réalisation des figures 1 et 2A à 2C, le système d'étanchéité (5) comporte des blocs en matériau élastique munis d'une surface déformable (6), chaque bloc étant logé par emboîtement dans un support (6'). Ce support (6'), portant ainsi la surface déformable (6), assure un contact franc avec la surface de fermeture, telle que la surface extérieure de l'insert (9).  According to the embodiment of Figures 1 and 2A to 2C, the sealing system (5) comprises blocks of elastic material provided with a deformable surface (6), each block being housed by interlocking in a support (6 ' ). This support (6 '), thus carrying the deformable surface (6), ensures a frank contact with the closure surface, such as the outer surface of the insert (9).
Un ou plusieurs blocs en matériau élastique peuvent être implantés dans le moule (1 ). Ils sont de préférence placés en partie supérieure et inférieure du moule, c'est-à- dire sur l'élément fixe (2) et sur l'élément mobile (3).  One or more blocks of elastic material may be implanted in the mold (1). They are preferably placed in the upper and lower part of the mold, that is to say on the fixed element (2) and on the movable element (3).
Selon l'exemple des figures 1 et 2A à 2C, le système d'étanchéité (5) est muni d'au moins deux surfaces déformables (6). Une surface déformable est montée coulissante dans la paroi (7) de l'élément fixe (2) et l'autre surface déformable est montée coulissante dans une paroi (7) de l'élément mobile (3). Les deux surfaces déformables (6) en contact avec l'insert (9) coopèrent afin d'éviter que la matière plastique (MP) ne flue en dehors de la cavité du moule (4). Elles sont ainsi en vis-à-vis, comme illustré sur les figures 1 et 2A à 2C, afin de créer une étanchéité optimale avant le début de la compression.  According to the example of Figures 1 and 2A to 2C, the sealing system (5) is provided with at least two deformable surfaces (6). A deformable surface is slidably mounted in the wall (7) of the fixed element (2) and the other deformable surface is slidably mounted in a wall (7) of the movable element (3). The two deformable surfaces (6) in contact with the insert (9) cooperate to prevent the plastic (MP) from flowing out of the cavity of the mold (4). They are thus vis-à-vis, as shown in Figures 1 and 2A to 2C, to create an optimal seal before the start of compression.
Avantageusement, le système d'étanchéité (5) comporte un moyen de déplacement (8) de la surface déformable (6) dans la paroi (7). Ce système permet de plaquer la surface déformable (6) contre la surface de fermeture, telle que l'insert (9), de façon à constituer une force de contre réaction à l'effort exercé par l'élément mobile (3) lors de la phase de compression de la matière plastique (MP). La figure 2C illustre les forces en jeu lors de la phase de compression. Sur l'exemple des figures 1 et 2A à 2C, les surfaces déformables (6), par l'intermédiaire des supports (6'), sont asservies par vérins hydrauliques (8) afin de créer une étanchéité optimale avant le début de la compression. Advantageously, the sealing system (5) comprises a means (8) for moving the deformable surface (6) in the wall (7). This system makes it possible to press the deformable surface (6) against the closure surface, such as the insert (9), so as to constitute a force against the force exerted by the movable element (3) during the compression phase of the plastics material (MP). Figure 2C illustrates the forces involved during the compression phase. In the example of FIGS. 1 and 2A to 2C, the deformable surfaces (6), via the supports (6 '), are servocontrolled by hydraulic cylinders (8) in order to create an optimal seal before the beginning of the compression .
Selon un autre mode de réalisation, illustré sur les figures 3 et 4, le système d'étanchéité (5) est muni d'au moins deux surfaces déformables (6), une surface déformable étant montée coulissante dans une paroi (7) d'un élément (2, 3) et l'autre surface déformable étant montée fixe dans la paroi (7) de l'autre élément (3, 2). Les deux surfaces déformables en contact avec la surface de fermeture, telle que l'insert (9), coopèrent afin d'éviter que la matière plastique (MP) ne flue en dehors de la cavité du moule (4). Elles sont ainsi en vis-à-vis, comme illustré sur les figures 3 et 4, afin de créer une étanchéité optimale avant le début de la compression.  According to another embodiment, illustrated in Figures 3 and 4, the sealing system (5) is provided with at least two deformable surfaces (6), a deformable surface being slidably mounted in a wall (7) of one element (2, 3) and the other deformable surface being fixedly mounted in the wall (7) of the other element (3, 2). The two deformable surfaces in contact with the closure surface, such as the insert (9), cooperate to prevent the plastic (MP) from flowing out of the cavity of the mold (4). They are thus vis-à-vis, as shown in Figures 3 and 4, to create an optimal seal before the start of compression.
L'invention concerne également un procédé de surmoulage d'un insert par une matière plastique au moyen d'un moule (1 ) selon l'invention. The invention also relates to a method of overmolding an insert with a plastic material by means of a mold (1) according to the invention.
Le procédé comporte au moins les étapes suivantes selon l'exemple des figures 1 et 2A à 2C :  The method comprises at least the following steps according to the example of FIGS. 1 and 2A to 2C:
l'insert (9) à mouler est positionné avec la matière plastique (MP) sur les blocs en matériau élastique, munis d'une surface déformable (6), du poinçon (2) en position haute (dans le cas d'un surmoulage sur deux faces).  the insert (9) to be molded is positioned with the plastic material (MP) on the blocks of elastic material, provided with a deformable surface (6), the punch (2) in the up position (in the case of an overmoulding on two sides).
- la presse (3) est fermée jusqu'à ce que les surfaces déformables (6) de la partie supérieure soit en contact avec l'insert (9). La matière plastique (MP) n'est pas encore compressée, mais la zone de fin pièce est étanche. the press (3) is closed until the deformable surfaces (6) of the upper part are in contact with the insert (9). The plastic (MP) is not yet compressed, but the end zone is sealed.
la presse (3) continue d'être descendue jusqu'à la côté nominale de la pièce à mouler, et l'on applique une pression pour faire fluer et polymériser la matière plastique (MP). Les surfaces déformables (6) sont toujours en pression sur l'insert the press (3) continues to be lowered to the nominal side of the molding, and a pressure is applied to flow and polymerize the plastic (MP). The deformable surfaces (6) are always in pressure on the insert
(9) pour assurer l'étanchéité : on applique une contrepression sur le système d'étanchéité (5) au moyen des vérins hydrauliques. Les surfaces déformables (6) reculeront (à l'intérieur de la paroi du moule dans laquelle elles sont positionnées) pendant la descente en pression de la presse (3). (9) to ensure tightness: it is applied against pressure on the sealing system (5) by means of hydraulic cylinders. The deformable surfaces (6) will recede (inside the wall of the mold in which they are positioned) during the pressure drop of the press (3).
- une fois le processus de transformation terminé (fluage, cuisson), la presse (3) s'ouvre et la pièce transformée est éjectée. - Once the process of transformation completed (creep, cooking), the press (3) opens and the transformed part is ejected.
Dans le cas de surfaces déformables (6) en partie supérieure et inférieure, ces derniers peuvent aider à l'éjection de la pièce sur sa périphérie. In the case of deformable surfaces (6) in the upper and lower part, the latter can help the ejection of the part on its periphery.

Claims

REVENDICATIONS
1 . Moule (1 ) pour la fabrication de pièce en matière plastique (MP), comportant un élément fixe (2) et un élément mobile (3) formant, en position fermée du moule (1 ) une cavité du moule (4), caractérisé en ce qu'au moins un des éléments comporte au moins un système de fermeture étanche (5) de la cavité (4), ledit système de fermeture étanche (5) étant muni d'au moins une surface déformable (6) en matériau élastique permettant de réaliser un contact étanche avec une surface de fermeture de la cavité du moule (4), et ladite surface déformable (6) étant montée coulissante dans une paroi (7) du moule (1 ) de façon à ajuster le contact étanche.1. Mold (1) for the manufacture of a plastic part (MP), comprising a fixed element (2) and a movable element (3) forming, in the closed position of the mold (1), a cavity of the mold (4), characterized in at least one of the elements comprises at least one sealing system (5) of the cavity (4), said sealing system (5) being provided with at least one deformable surface (6) of elastic material allowing making a sealing contact with a closing surface of the mold cavity (4), and said deformable surface (6) being slidably mounted in a wall (7) of the mold (1) so as to adjust the sealing contact.
2. Moule (1 ) selon la revendication 1 , dans lequel ledit matériau élastique comprend au moins un polymère du groupe formé par une polyétheréthercétone, dit PEEK.2. Mold (1) according to claim 1, wherein said elastic material comprises at least one polymer of the group formed by a polyetheretherketone, said PEEK.
3. Moule (1 ) selon l'une des revendications précédentes, dans lequel la surface déformable (6) est déplaçable en translation parallèlement à une direction de fermeture du moule (1 ). 3. Mold (1) according to one of the preceding claims, wherein the deformable surface (6) is movable in translation parallel to a closing direction of the mold (1).
4. Moule (1 ) selon l'une des revendications précédentes, dans lequel le système d'étanchéité (5) comporte un moyen de déplacement (8) de ladite surface déformable (6) dans ladite paroi (7), adapté à plaquer ladite surface (6) contre la surface de fermeture de façon à constituer une force de contre réaction à un effort exercé par l'élément mobile (3) lors d'une phase de compression de la matière plastique (MP).  4. Mold (1) according to one of the preceding claims, wherein the sealing system (5) comprises a displacement means (8) of said deformable surface (6) in said wall (7), adapted to press said surface (6) against the closure surface so as to constitute a force against reaction to a force exerted by the movable element (3) during a compression phase of the plastic material (MP).
5. Moule (1 ) selon la revendication 4, dans lequel le moyen de déplacement (8) est un vérin hydraulique.  5. Mold (1) according to claim 4, wherein the moving means (8) is a hydraulic cylinder.
6. Moule (1 ) selon l'une des revendications précédentes, dans lequel la surface déformable (6) a une forme complémentaire de la surface de la surface de fermeture en contact avec ladite surface déformable (6).  6. Mold (1) according to one of the preceding claims, wherein the deformable surface (6) has a shape complementary to the surface of the closure surface in contact with said deformable surface (6).
7. Moule (1 ) selon l'une des revendications précédentes, dans lequel ledit système d'étanchéité (5) est muni d'au moins deux surfaces déformables (6), une surface étant montée coulissante dans une paroi (7) de l'élément fixe (2) et l'autre surface étant montée coulissante dans une paroi (7) de l'élément mobile (3), les deux surfaces coopérant afin d'éviter que la matière plastique (MP) ne flue en dehors de la cavité de surmoulage (4).  7. Mold (1) according to one of the preceding claims, wherein said sealing system (5) is provided with at least two deformable surfaces (6), a surface being slidably mounted in a wall (7) of the fixed element (2) and the other surface being slidably mounted in a wall (7) of the movable element (3), the two surfaces cooperating to prevent the plastic material (MP) from flowing out of the overmolding cavity (4).
8. Moule (1 ) selon la revendication 7, dans lequel une des surfaces est montée fixe dans la paroi (7).  8. Mold (1) according to claim 7, wherein one of the surfaces is fixedly mounted in the wall (7).
9 Procédé de surmoulage d'un insert par une matière plastique au moyen d'un moule (1 ) selon l'une des revendications 1 à 9, dans lequel on utilise au moins une surface de l'insert (9) comme surface de fermeture. Method for overmolding an insert with a plastic material by means of a mold (1) according to one of Claims 1 to 9, in which at least one surface of the insert (9) is used as a closure surface. .
EP15798504.5A 2014-10-31 2015-10-26 Mould for producing a part made from plastic materials, comprising an optimized sealing system Withdrawn EP3212376A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460530A FR3027835B1 (en) 2014-10-31 2014-10-31 MOLD FOR THE MANUFACTURE OF A PLASTIC PART WITH AN OPTIMIZED SEALING SYSTEM
PCT/FR2015/052872 WO2016066940A1 (en) 2014-10-31 2015-10-26 Mould for producing a part made from plastic materials, comprising an optimized sealing system

Publications (1)

Publication Number Publication Date
EP3212376A1 true EP3212376A1 (en) 2017-09-06

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EP15798504.5A Withdrawn EP3212376A1 (en) 2014-10-31 2015-10-26 Mould for producing a part made from plastic materials, comprising an optimized sealing system

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US (1) US20180272575A1 (en)
EP (1) EP3212376A1 (en)
CN (1) CN107107405A (en)
FR (1) FR3027835B1 (en)
WO (1) WO2016066940A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3072604B1 (en) * 2017-10-23 2020-11-20 Paradox STRUCTURAL BONDING PROCESS OF STRUCTURAL PARTS AND BONDING INSERT FOR THE IMPLEMENTATION OF THE SAID PROCESS
DE102017219325A1 (en) * 2017-10-27 2019-05-02 Zf Friedrichshafen Ag Injection tool and method for sealing inserts
DE102021126738B3 (en) 2021-10-15 2022-12-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Tool system for plastic casting of a stator encapsulation, method for plastic casting by means of such a tool system and a traction machine provided with a stator encapsulation by means of such a tool system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958141A (en) * 1931-09-23 1934-05-08 Goodrich Co B F Method of making alpha flexible connection
EP0230709A2 (en) * 1986-01-21 1987-08-05 Group Lotus Plc Mould for moulding an article
EP0299611A1 (en) * 1987-06-05 1989-01-18 Takeda Chemical Industries, Ltd. Compression molding apparatus and method
JPH02141227A (en) * 1988-11-22 1990-05-30 Mitsubishi Rayon Eng Co Ltd Continuous pressure device
US20090291532A1 (en) * 2006-05-17 2009-11-26 Shinji Takase Method of resin encapsulation molding for electronic part

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB605978A (en) * 1946-01-07 1948-08-04 Fairey Aviat Co Ltd Improvements in or relating to insert moulding
US2772012A (en) * 1951-05-10 1956-11-27 Anchor Hocking Glass Corp Method and device for manufacturing closure caps and closure cap produced thereby
NL7710555A (en) * 1977-09-28 1979-03-30 Philips Nv METHOD AND DEVICE FOR MANUFACTURING INFORMATION CONTAINING PLATES.
GB2155395A (en) * 1984-03-06 1985-09-25 Asm Fico Tooling Apparatus for flash-free insert molding
FR2572987B1 (en) * 1984-09-21 1987-01-02 Pont A Mousson METHOD AND DEVICE FOR OVER-MOLDING A SURROUNDING OF PRECISE DIMENSIONS ON THE SURROUNDING OF A FLAT OR GALBED PART WITH DIMENSIONAL TOLERANCES
US4794855A (en) * 1986-08-05 1989-01-03 Mitsubishi Rayon Engineering Co., Ltd. Continuous press machine
JP3219407B2 (en) * 1990-11-26 2001-10-15 エクセル株式会社 Multilayer plastic tube and method of manufacturing the same
JPH0732424A (en) * 1993-07-15 1995-02-03 Mitsubishi Heavy Ind Ltd Injection compression molding die
US5597523A (en) * 1994-02-22 1997-01-28 Mitsubishi Denki Kabushiki Kaisha Molding apparatus and method in which a mold cavity gasket is deformed by separately applied pressure
JP2804451B2 (en) * 1995-03-23 1998-09-24 日本碍子株式会社 Compression molding dies for composite insulator production
JPH09123210A (en) * 1995-10-31 1997-05-13 Ykk Corp Mold apparatus for mounting string stopper
JP4114926B2 (en) * 2003-06-20 2008-07-09 河西工業株式会社 Molding method and molding die for foamed resin molded body
JP4160927B2 (en) * 2004-04-27 2008-10-08 豊田鉄工株式会社 Mold for synthetic resin compression molding
EP2273952B1 (en) * 2008-04-02 2018-02-21 Pioneer Surgical Technology, Inc. Intervertebral implant devices for supporting vertebrae and devices for insertion thereof
CN101767396A (en) * 2009-01-07 2010-07-07 丰泰企业股份有限公司 Method and die for manufacturing outsoles for shoes
JP5378117B2 (en) * 2009-08-31 2013-12-25 河西工業株式会社 Molding method and molding apparatus for foamed resin molded product
FR2999468B1 (en) * 2012-12-14 2015-05-29 Plastic Omnium Cie COMPRESSION MOLDING BODY WITH IMPROVED SEALING

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958141A (en) * 1931-09-23 1934-05-08 Goodrich Co B F Method of making alpha flexible connection
EP0230709A2 (en) * 1986-01-21 1987-08-05 Group Lotus Plc Mould for moulding an article
EP0299611A1 (en) * 1987-06-05 1989-01-18 Takeda Chemical Industries, Ltd. Compression molding apparatus and method
JPH02141227A (en) * 1988-11-22 1990-05-30 Mitsubishi Rayon Eng Co Ltd Continuous pressure device
US20090291532A1 (en) * 2006-05-17 2009-11-26 Shinji Takase Method of resin encapsulation molding for electronic part

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2016066940A1 *

Also Published As

Publication number Publication date
FR3027835A1 (en) 2016-05-06
FR3027835B1 (en) 2017-09-01
WO2016066940A1 (en) 2016-05-06
US20180272575A1 (en) 2018-09-27
CN107107405A (en) 2017-08-29

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