• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a multilayer device (1) for mold (100) comprising a reinforcing structure (10) made of composite materials comprising at least one reinforcing layer (10a, 10b), and a layer of active surface of complex shape arranged on the reinforcing structure and for defining a functional face (2a) on an outer side of said device. The active surface layer consists of a metal skin (1), said complex shape being obtained directly by forming the metal skin. The invention also relates to a method for manufacturing a multilayer device of a mold, comprising the following steps: forming the metal skin (2) for the creation of a complex shape for defining a functional face (2a) on an outer side of said device; depositing at least one reinforcing layer on one side of the skin opposite said functional face, said metal skin (2) constituting a master model; baking the assembly for curing said at least one reinforcing layer.
    公开号:BE1024438B1
    申请号:E2017/5634
    申请日:2017-09-07
    公开日:2018-02-20
    发明作者:Gorp Adrien Van；Marc Legrand；Olivier Duthoit
    申请人:Amvalor Société Par Actions Simplifiée À Associé Unique；
    IPC主号:
    专利说明:

    (73) Holder (s):
    AMVALOR Simplified joint-stock company with single partner
    75013, PARIS
    France (72) Inventor (s):
    VAN GORP Adrien
    59330 BEAUFORT
    France
    LEGRAND Marc
    59230 SAINT-AMAND-LES-EAUX France
    DUTHOIT Olivier
    59155 FACHES-THUMESNIL France (54) MULTILAYER DEVICE WITH METALLIC MOLD SKIN, AND METHOD FOR MANUFACTURING SUCH A MULTILAYER DEVICE (57) The invention relates to a multilayer device (1) for a mold (100) comprising a reinforcement structure ( 10) made of composite materials comprising at least one reinforcing layer (10a, 10b), and an active surface layer of complex shape arranged on the reinforcing structure and making it possible to define a functional face (2a) on an external side of said device. The active surface layer consists of a metallic skin (1), said complex shape being obtained directly by forming the metallic skin. The invention also relates to a method for manufacturing a multilayer device for a mold, comprising the following steps: forming the metal skin (2) to create a complex shape enabling a functional face (2a) to be defined on an external side of said device; depositing at least one reinforcing layer on one side of the skin opposite said functional face, said metallic skin (2) constituting a master model; baking the assembly to harden said at least one reinforcing layer.
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    BELGIAN INVENTION PATENT
    FPS Economy, SMEs, Middle Classes & Energy
    Publication number: 1024438 Deposit number: BE2017 / 5634
    Intellectual Property Office International Classification: B29C 33/02 B21D 31/00 B29C 70/78 B29C 70/88 H05B 3/10 Date of issue: 20/02/2018
    The Minister of the Economy,
    Having regard to the Paris Convention of March 20, 1883 for the Protection of Industrial Property;
    Considering the law of March 28, 1984 on patents for invention, article 22, for patent applications introduced before September 22, 2014;
    Given Title 1 “Patents for invention” of Book XI of the Code of Economic Law, article XI.24, for patent applications introduced from September 22, 2014;
    Having regard to the Royal Decree of 2 December 1986 relating to the request, the issue and the maintenance in force of invention patents, article 28;
    Given the patent application received by the Intellectual Property Office on 07/09/2017.
    Whereas for patent applications falling within the scope of Title 1, Book XI of the Code of Economic Law (hereinafter CDE), in accordance with article XI. 19, §4, paragraph 2, of the CDE, if the patent application has been the subject of a search report mentioning a lack of unity of invention within the meaning of the §ler of article XI.19 cited above and in the event that the applicant does not limit or file a divisional application in accordance with the results of the search report, the granted patent will be limited to the claims for which the search report has been drawn up.
    Stopped :
    First article. - It is issued to
    AMVALOR Simplified joint-stock company with single partner, Boulevard de l'Hôpital 151, 75013 PARIS France;
    represented by
    VANDENBOSSCHE Simon, Place Marmottan 85 - BP 30247.62405, BETHUNE Cedex;
    a 20-year Belgian invention patent, subject to the payment of the annual fees referred to in article XI.48, §1 of the Code of Economic Law, for: MULTILAYER DEVICE WITH METALLIC MOLD SKIN, AND PROCESS METHOD FOR MANUFACTURING SUCH A MULTILAYER DEVICE.
    INVENTOR (S):
    VAN GORP Adrien, Rue d'Hautmont 1, 59330, BEAUFORT;
    LEGRAND Marc, 1095 Route de la Fontaine Bouillon, 59230, SAINT-AMAND-LES-EAUX;
    DUTHOIT Olivier, 29 Rue des Aubépines, 59155, FACHES-THUMESNIL;
    PRIORITY (S):
    09/09/2016 FR 1670497;
    DIVISION:
    divided from the basic application: filing date of the basic application:
    Article 2. - This patent is granted without prior examination of the patentability of the invention, without guarantee of the merit of the invention or of the accuracy of the description thereof and at the risk and peril of the applicant (s) ( s).
    Brussels, 20/02/2018, By special delegation:
    BE2017 / 5634
    MULTILAYER DEVICE WITH METAL MOLD SKIN, AND
    METHOD FOR MANUFACTURING SUCH A MULTI-LAYERED DEVICE
    The present invention relates to a multilayer mold device, said multilayer device consisting of a composite material structure associated with at least one thin metallic skin. The present invention also relates to a method of manufacturing said multilayer device with metallic skin.
    Advantageously and without limitation, the invention finds its application in the field of rigid molds with high surface durability incorporating endogenous heating for the production of polymer and composite parts in large series.
    State of the prior art
    The composite parts with thermosetting organic matrices are obtained by means of a mold. To date, there are several types of molds, in particular metallic or composite molds.
    Metal molds are obtained by mass machining or rough casting, or by assembling mechanically welded sheets. Metal molds are relatively heavy and expensive, which can weigh several tens of tonnes. In addition, the use of this type of mold results in a great consumption of energy to produce composite parts. In fact, metal molds tend to standardize the temperature of the molding surface but also have significant thermal inertia. Heating the skin of the mold is possible by induction but this constitutes an additional cost for its implementation.
    Composite molds are a solution to the various drawbacks encountered for metal molds. However, due to their lack of hardness, they are not suitable for large series. Indeed, this lack of hardness makes the useful surface of the mold fragile, the latter cracking or flaking, which affects its lifespan as well as the surface finish of the molded part.
    There are already hybrid molds with a composite material structure, the useful surface of which carries a nanocrystalline coating consisting of an iron / nickel alloy. These properties allow the composite molding tool to reach a service life comparable to that of traditional metal molds. However, the coating process is very long and very expensive.
    There are also hybrid molds which are produced by depositing metallic powders on the surface of the master model before the skin is made of composite materials from the mold, which gives it
    BE2017 / 5634 high surface hardness. However, this technique requires the manufacture of an expensive master model.
    Object of the invention
    The present invention relates to a multilayer device with metal skin of a mold which overcomes the aforementioned drawbacks. The invention constitutes an improvement in molds made of composite materials, due to the surface hardness obtained thanks to the presence of the metallic skin.
    In addition, in a preferred embodiment where the multilayer device with metallic skin is associated with an endogenous heating system present on the mold, in particular that implemented in patent FR2956555B1, the present invention offers a technology that competes with metallic heated molds, with a significantly lower investment and energy consumption costs, while having a comparable lifespan. Indeed, the low thermal inertia of this mold is favorable for the production of parts at high rate.
    Furthermore, the present invention also relates to a simplified method of manufacturing this multilayer device with metal skin, said method making it possible in particular to dispense with the manufacture of a master model, which makes it less expensive than the solutions of hybrid molds. metallo-composite according to the prior art.
    Summary of the invention
    To this end, the invention relates to a multilayer device of a mold, of the metallo-composite hybrid mold type, the multilayer device comprising at least one reinforcing structure made of composite materials which comprises at least one reinforcing layer. The multilayer device also comprises an active surface layer of complex shape which may or may not be developable, this active surface layer being arranged on the reinforcement structure and making it possible to define a functional face on an external side of said device.
    Remarkably, the active surface layer consists of a metallic skin, said complex shape being obtained directly by forming the metallic skin. The use of a metal skin on the multilayer device serving directly as the functional face, advantageously allows the manufacture of very large series of composite parts while eliminating the risks of degradation of said functional face due to mass production.
    In a preferred implementation of the multilayer mold device according to the invention, it incorporates at least one endogenous heating system. This at least one endogenous heating system makes it possible to greatly reduce the energy consumption used for cooking during the manufacture of a composite part, in comparison with exogenous heating systems of the autoclave or oven type. Of
    BE2017 / 5634 preferably, this endogenous heating system comprises at least one resistive heating network embedded in a resin, said resin being linked to the structure of composite materials and participating in the very structure of the composite. This design ensures remarkable adhesion of the heating network to the reinforcement structure. Preferably, the resistive heating network comprises an electrically insulated core of dry fiber, said core being able to be impregnated with resin, a resistive wire wound around the core and an electrical supply connected to the resistive wire. This resistive wire can be coated with a dry fiber sheath, in a variant.
    In a preferred embodiment of the multilayer device according to the invention, the structure made of composite materials comprises at least two reinforcing layers.
    In one embodiment of the multilayer device according to the invention, it comprises a structure of stiffeners, said structure being arranged on said device, on the side opposite to the functional face.
    This stiffener structure will be adapted according to the level of stresses applied to the mold during the operating phase.
    The invention does not exclude the use of a multilayer device comprising several reinforcing structures and / or several endogenous heating systems.
    The invention also relates to a method for manufacturing a multilayer device for a mold. The process includes the following steps:
    for forming the metal skin for the creation of a complex shape making it possible to define a functional face on an external side of said device;
    depositing at least one reinforcing layer, preferably at least two, on a side of the skin opposite to said functional face, said metal skin constituting a master model to said multilayer device;
    baking the assembly to harden said at least one reinforcing layer.
    According to the invention, the manufacturing process comprises a step of making arrangements in the metal skin, such as sealing grooves, voids, resin supplies and / or precise positioning markings.
    According to the invention, the manufacturing process comprises a step of integrating inserts on the metal skin, such as vents and / or vacuum or resin supply connections.
    This integration step is carried out by welding or by any other assembly means ensuring the seal between the insert and the metal skin.
    BE2017 / 5634
    According to the invention, the manufacturing process comprises a step of integrating guide inserts on the metal skin, to provide guide functionalities. This step is carried out by welding or any other means of assembly.
    According to the invention, the manufacturing process comprises a step of depositing a layer incorporating an endogenous heating system, on the at least one reinforcing layer. Preferably, in the presence of such an endogenous heating system, the step of cooking the entire multilayer device is carried out by means of said endogenous heating system. Preferably, the method comprises the deposition of several reinforcing layers between which the endogenous heating system is interposed.
    According to the invention, the manufacturing process comprises a step of fitting out a structure of stiffeners on a side opposite to said external side.
    In a preferred embodiment of the manufacturing process, the step of creating the metallic skin is implemented by incremental forming. This forming technique allows cost reduction by the absence of specific tools (no need for a master model) as well as a quantity of raw material used reduced to a minimum. However, any other forming process can be envisaged, depending on the types of metals used for the design of this metallic skin.
    The invention thus allows the implementation of a hybrid metallo-composite mold, preferably incorporating at least one endogenous heating system. The essential characteristics of the multilayer device integrating, moreover, at least one endogenous heating system and those of the method of manufacturing said multilayer device are found in patent FR2956555B1, the essential difference compared to said patent FR2956555B1 being to replace the surface layer of material. thermosetting, more commonly called “gelcoat”, by a metallic skin constituting said surface layer, in order to obtain a rigid heating mold of complex three-dimensional geometry endowed with a functional face of a high surface hardness, which makes it possible to ensure the durability of the mold throughout the operating phase. In addition, the presence of this metallic skin makes it possible to replace the master model necessary according to the prior art for manufacturing the multilayer device.
    Brief description of the figures
    The present invention will be better understood on reading a detailed example of embodiment with reference to the accompanying drawings, provided by way of non-limiting example, among which:
    Figure 1 shows a first embodiment of the metal skin of complex shape;
    BE2017 / 5634 FIG. 2 represents a detail of this skin corresponding to an integration of the sealing functions, of resin supply channels, of repositioning of two half-molds, by precise local marking;
    Figure 3 shows the integration of inserts allowing connections or vents; Figure 4 shows the integration of inserts for guidance functionality; FIG. 5 presents a sectional view of the different layers constituting the composite back incorporating a system of heating networks;
    Figure 6 shows the additional devices that can be installed on the back of the half-mold;
    Figure 7 shows the assembly of two half-molds made according to this technique; Figure 8 shows an embodiment of a heating cord of a resistive heating network.
    Detailed description of the figures
    Figures 5 and 6 illustrate a multilayer device 1 of a mold 100 as a whole. The basic idea of the invention is to first produce the metallic skin 2, illustrated in FIGS. 1 to 4, corresponding to the active surface of the multilayer device L The shape of this metallic skin 2 will be obtained preferably by incremental forming of a sheet, without master model, that is to say without counterform. This technique makes it possible to obtain metallic parts of the thin shell type with complex geometries. The incremental forming of the metal skin 2 allows the production of a functional face 2a of complex geometry constituting the negative of the composite parts to be manufactured using said mold 100.
    As illustrated in FIG. 2, the incremental forming of the metal skin also makes it possible to directly integrate shapes allowing complementary functions such as sealing grooves 3, the resin injection channels 4 or markings 5 for repositioning of parts of molds between them.
    As illustrated in FIG. 3, it is also possible to integrate inserts 6 by welding or any other sealed connection method, to provide functionalities such as vents or connections 7 for evacuating or supplying resin.
    As illustrated in FIG. 4, it is also possible to integrate guide inserts 8 by welding, to provide guide functionalities 9, in particular during the cooperation of two multilayer devices 1,1 ′ constituting two parts assembled together for the formation of a mold variant 100.
    Once the metal skin 2 is produced, it will serve as a functional surface, giving the shape to the composite part produced. As illustrated in FIG. 5, the multilayer device 1 is
    BE2017 / 5634 consisting of the assembly of this metallic skin 2 and a reinforcing structure 10 comprising two reinforcing layers 10a, 10b made of composite materials between which, preferably, is integrated a heating network 11 of resistive type manufactured in accordance with Patent FR2956555B1.
    As illustrated with reference to FIGS. 5, 6 and 8, this heating network 11 comprises a cord 200 which includes a resistive wire 201 surrounding an electrically insulated core 202, this core 202 consisting of dry fibers formed like a wick. The resistive wire 201 is electrically connected by means of a connection cable (not shown). The core 202 constitutes a support for an impregnation resin 203 which makes it possible to ensure the adhesion of the bead 200 with the reinforcing layers 10a, 10b themselves pre-impregnated with resin. The cord 200 may optionally include, in addition, a sheath 204 of dry fiber surrounding said resistive wire 201 and able to be impregnated with resin 203. The choice of whether or not to integrate this sheath 204 will depend in particular on the electrical conductivity of the layers of reinforcements 10a, 10b, depending on the composite material used for them. The cord 200 is secured to a dry fabric 205 by stitching 206. This dry fabric 205 is advantageously made of a fibrous composite material identical to that used for the reinforcing layers 10a, 10b. For example, the fabric will be made of glass fibers, carbon fibers or even thermoplastic fibers. Alternative embodiments of the multilayer device can be envisaged with more than two layers of reinforcements and two heating networks separated from one another by at least one layer of reinforcements, such an implementation appearing in patent FR2956555B1.
    In this configuration, the metal skin 2 advantageously makes it possible to eliminate the static charges, which makes it possible to dispense with the use of a metal mesh like that provided for in patent FR2956555B1.
    The multilayer device 1, comprising the reinforcing layers 10a, 10b made of composite fibers, the heating network 11 and the metal skin 2, will then be placed under a vacuum cover with the entire device necessary for impregnation by infusion, for example , or even by any other equivalent process. Following this infusion, the polymerization of the resin at very low temperature keeps the geometry of the metallic skin constant during this phase. The post-baking is then carried out using the heating network 11, using a temperature ramp which is sufficiently low for the composite materials to retain their structuring character, so as not to lose the geometric quality of the mold.
    As illustrated in FIG. 6, a stiffener structure 13 consisting of a reinforcement of the sandwich structure type 13a, 13b, can be added to the reinforcement structure 10 on the internal side of the multilayer device 1 thus produced, that is to say - say on the opposite side to the metallic skin 2.
    The multilayer device 1 can be used for making parts of composite materials by infusion or any other process. It can also be combined with a second device
    2017/5634
    BE2017 / 5634 multilayer 1 ’with a similar design to that described above, all producing a closed mold 100 for injection operations of plastic parts or polymer matrix composites, as illustrated in FIG. 7.
    The foregoing description of a preferred embodiment is in no way limiting.
    Many variants can be envisaged by modifying the number of reinforcing layers and the number of resistive heating networks. Variants of heating networks are also possible without departing from the scope of the invention.
    One can also consider the implementation of a multilayer device according to the invention in the absence of a heating network, without modifying the beneficial effects of the presence of a metallic skin on said multilayer device. In which case an exogenous heating system should be provided.
    BE2017 / 5634
    权利要求:
    Claims (13)
    [1]
    1. Multilayer device (1, Γ) of a mold (100) comprising a reinforcing structure (10) made of composite materials comprising at least one reinforcing layer (10a, 10b), and an active surface layer of complex shape arranged on the reinforcement structure and making it possible to define a functional face (2a) on an external side of said device, characterized in that the active surface layer consists of a metallic skin (2) created by incremental forming, without master model, said complex shape being obtained directly during the incremental forming of the metallic skin.
    [2]
    2. Multilayer device (1, Γ) according to claim 1, which incorporates an endogenous heating system (11).
    [3]
    3. Multilayer device (1, Γ) according to claim 2, wherein the endogenous heating system comprises a resistive heating network (11) embedded in a resin (203), said resin being linked to the reinforcement structure (10) made of materials composites.
    [4]
    4. Multilayer device (1, Γ) according to claim 3, in which the resistive heating network (11) comprises a core (202) electrically insulated in dry fiber, said core being able to be impregnated with resin (203), a resistive wire (201) wound around the core and an electrical power supply connected to the resistive wire.
    [5]
    5. Multilayer device (1, Γ) of the mold according to one of the preceding claims, in which the reinforcing structure (10) made of composite materials comprises at least two reinforcing layers (10a, 10b).
    [6]
    6. Multilayer device (1, Γ) according to one of the preceding claims, which comprises a structure of stiffeners (13) arranged on said device, on the side opposite to the functional face (2a).
    [7]
    7. Method of manufacturing a multilayer device (1, 1 ’) of a mold (100), characterized in that it comprises the following steps:
    creating a metallic skin (2) by incremental forming, without a master model, for obtaining a complex shape making it possible to define a functional face (2a) on an external side of said device;
    - depositing at least one reinforcing layer (10a, 10b) on one side of the metal skin (2) opposite to said functional face (2a), said metal skin constituting a master model;
    - baking the whole to harden said at least one reinforcing layer (10a, 10b).
    [8]
    8. The manufacturing method according to claim 7, which comprises a step of making arrangements in the metal skin, such as sealing grooves (3), voids, resin supplies (4) and / or precise positioning markings (5).
    [9]
    9. The manufacturing method according to claim 7, which comprises a step of integrating inserts (6) on the metal skin (2), such as vents and / or vacuum connections or resin feed.
    2017/5634
    BE2017 / 5634
    [10]
    10. The manufacturing method according to one of claims 7 to 9, which comprises a step of integrating guide inserts (8) on the metal skin (2).
    [11]
    11. The manufacturing method according to one of claims 7 to 10, which comprises a step of depositing a layer incorporating an endogenous heating system (11), on at least one
    5 reinforcement layer (10a).
    [12]
    12. The manufacturing method according to claim 11, in which the cooking step of the entire multilayer device (1, 1 ’) is carried out by means of said endogenous heating system (11).
    [13]
    13. The manufacturing method according to one of claims 7 to 12, which comprises a step of fitting a stiffener structure (13) on a side opposite to said external side.
    BE2017 / 5634
    1/4
    7.
    2/4
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    同族专利:
    公开号 | 公开日
    FR3055570A1|2018-03-09|
    FR3055570B1|2019-11-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FI82412C|1988-07-14|1991-03-11|Neste Oy|PLASTIC MED METALYTA OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA.|
    US6279425B1|1999-11-12|2001-08-28|Edmond Burton Cicotte|Method of producing tools and dies|
    JP2001239334A|1999-12-20|2001-09-04|Honda Motor Co Ltd|Manufacturing method for stamping die and stamping punch, and stamping die|
    US8316687B2|2009-08-12|2012-11-27|The Boeing Company|Method for making a tool used to manufacture composite parts|
    FR2956555B1|2010-02-15|2012-04-13|Arts|MULTILAYER DEVICE FOR ENDOGENEOUS HEATING MOLD AND METHOD OF MANUFACTURING SAME|
    法律状态:
    2018-03-14| FG| Patent granted|Effective date: 20180220 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1670497A|FR3055570B1|2016-09-07|2016-09-07|MULTILAYER DEVICE WITH METAL MOLD SKIN AND METHOD OF MANUFACTURING SUCH MULTILAYER DEVICE|
    FR1670497|2016-09-07|
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