WO2024201099A1 - Procédé de fabrication d'un composant creux en matériau composite à l'aide d'un mandrin pliable et réutilisable - Google Patents

Procédé de fabrication d'un composant creux en matériau composite à l'aide d'un mandrin pliable et réutilisable Download PDF

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Publication number
WO2024201099A1
WO2024201099A1 PCT/IB2023/053028 IB2023053028W WO2024201099A1 WO 2024201099 A1 WO2024201099 A1 WO 2024201099A1 IB 2023053028 W IB2023053028 W IB 2023053028W WO 2024201099 A1 WO2024201099 A1 WO 2024201099A1
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WIPO (PCT)
Prior art keywords
mandrel
curing
temperature
hollow
glass transition
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Ceased
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PCT/IB2023/053028
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English (en)
Inventor
Gianluca Cicala
Claudio TOSTO
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Universita degli Studi di Catania
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Universita degli Studi di Catania
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Priority to PCT/IB2023/053028 priority Critical patent/WO2024201099A1/fr
Publication of WO2024201099A1 publication Critical patent/WO2024201099A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • 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
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/50—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible
    • B29C33/505—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible cores or mandrels, e.g. inflatable
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/82—Cores or mandrels
    • B29C53/821—Mandrels especially adapted for winding and joining
    • B29C53/824—Mandrels especially adapted for winding and joining collapsible, e.g. elastic or inflatable; with removable parts, e.g. for regular shaped, straight tubular articles

Definitions

  • the present invention relates to a method of making a hollow component by means of a collapsible and reusable mandrel , the hollow component being of a polymeric matrix composite material which can be male mold laminated on the mandrel , e . g . with elongated reinforcing fibers such as a pre-preg .
  • the invention therefore is included in the technical field of the production of mandrels or also known to those skilled in the art as preformed cores for making hollow bodies . More speci fically, the invention can be included in the technical field of the production of mandrels by 3D printing or with additive manufacturing methods .
  • the bodies are hollow and have particularly complex shapes , as for example in the case of bodies with variable section or other undercuts , the use , and the consequent extraction, of mandrels or manufacturing aids is prevented, for example , by the limited accessibility internal to the piece or by the structural characteristics of the core or mandrel e.g. stiffness that hinders or prevents extraction.
  • the component to be made has hollow bodies in composite material that can be male mold laminated, these are usually made by stratification of dry layers, e.g. fabrics, in long or short fibers or pre-impregnated with resin.
  • the fibers are preferably long and of a high resistance material such as carbon, aramid, glass, natural fibers of a vegetable nature, basalt-based fibers.
  • the first approach is to use semi-molds. These halfmolds are hollow and the composite material is applied to form corresponding half-shells which are subsequently joined to compose the final product.
  • the composite layer (or often the multilayer) is initially applied to the two half-molds which are then joined together.
  • An expandable bag is inserted into the cavity formed by the joined half-molds, to then be pressurized during the curing of the resin and thus apply pressure to the layer against the half-molds.
  • the bag is fully collapsible and packable when deflated and the corresponding shape, when pressurized, tends to have large fillet radii so as to be unsuitable e.g. to obtain hollow bodies with polygonal cross section with few sides.
  • it does not allow the so-called 'male' lamination, i.e. through the deposition of material on the mandrel, since the bag does not have its own structure rigid enough to support the composite layers and the application pressure, e.g. by the latter's hand .
  • Pieces made with this approach effectively comprise two halves joined together to form a single piece.
  • the joint line often contained in a plane, requires a finishing post-processing after the extraction from the mold, and above all, it defines an area wherein the probability of fracture of the piece is high.
  • the second approach provides for the use of so-called 'break away' mandrels, i.e. rigid mandrels at the time of application of the composite layer/s which are destroyed in order to be extracted from the hollow body.
  • mandrels substantially replicate the geometry of the component to be made, and having sufficient stiffness, they allow male mold lamination as they resist undeformed to the applied pressure, e.g. manually during lamination.
  • the removal of the mandrel and mandrel material residues after curing the polymer matrix of the laminated product requires mostly manual removal.
  • the destruction of the mandrel carries with it the risk of damaging the component made of composite material, and in some cases it can be difficult or impossible to achieve, due to the difficulty of accessing the component internally .
  • using a rigid core requires molds with carefully si zing tolerances in order to precisely define the residual volume for compacting the composite material , so that the mold can operate suf ficient and necessary pressure on the composite to compact it . In such solutions it is also necessary that the mandrel maintains its shape at the curing temperatures .
  • Soluble cores such as break away cores , repl icate the geometry of the component to be manufactured and allow male mold lamination .
  • These cores also have the advantage that they can be removed by dissolving rather than by mechanical action .
  • a further scope of the present invention is to provide a mixture for making a collapsible and reusable mandrel capable of solving the drawbacks of the prior art , highlighted above .
  • a further scope of the present invention is to provide a collapsible and reusable mandrel which is at the same time rigid at room temperature , for example to allow male mold lamination of long and/or short dry woven and/or non-woven fibers , for example , of a carbon f iber, or a pre-preg of woven and/or non-woven fibers , and collapsible or flexible to be able to resist overpressures at the curing temperatures and under-pressures with respect to the ambient pressure , to allow, for example , the compaction of the fibers and removal of the mandrel at the end of the process , respectively .
  • a hollow mandrel of a thermosetting polymeric material having a glass transition temperature greater than or equal to 50 ° C, preferably between 50 ° and 110 ° C so as to be rigid at room temperature i . e . 20 ° C with an original shape , the mandrel further having a connector for pressuri zing/depressuri zing the mandrel through a fluid; - male mold laminating on the rigid mandrel one or more layers of composite material e.g. dry fibers and/or prepreg;
  • the curing temperature is preferably between 80° and 160° or even 180°C on the basis of the polymeric matrix and in any case higher than the glass transition temperature;
  • Depressurization at temperatures above the glass transition temperature i.e. 'hot' of the mandrel allows to obtain a dimensional contraction of the mandrel to simplify the extraction even in the presence of undercuts in the laminated product of cured composite material. It is also important, during the curing of the polymeric matrix of the laminated product, to pressurize the mandrel which is at a temperature higher than the glass transition temperature. In fact, in the absence of this pressurization, the mandrel would tend to deform during curing, in turn deforming the laminated product during curing . This action is particularly ef fective in the presence of a counter-mold, as will be better discussed below .
  • the mandrel is reusable since , being the mandrel of a thermosetting material , it regains its original shape after depressuri zation above the glass transition temperature . Furthermore , the curing of the mandrel is not signi ficantly af fected by the heat treatment for the matrix curing of the laminated product so as to avoid excessive sti f fness of the mandrel even above the glass transition temperature .
  • figure 1 schematically illustrates the steps of a method of making hollow components according to the present invention
  • FIG. 2 and 3 illustrate respectively the temperature and pressure cycle used in the method of figure 1 ;
  • figure 4 illustrates following steps of hot depressuri zation of a hollow mandrel used according to the invention.
  • FIG. 5-7 are corresponding views and sections of the hollow mandrel of figure 4 .
  • the method of the present invention is performed by means of a collapsible and reusable mandrel M, made through a mixture of polymeric materials .
  • thermosetting mixture for making a collapsible and reusable hollow mandrel M is based on polymeric materials to form a hollow mandrel M having rigid walls at room temperature to enable mandrel male mold lamination of a polymeric matrix composite material and short or elongated reinforcing fibers .
  • the thermosetting mixture for making the mandrel M is characteri zed by a glass transition temperature greater than or equal to 50 ° C, preferably between 50 ° C and 110 ° C, and selected to be lower than the curing temperature of the matrix of the composite material of the product laminated so that it is possible to depressuri ze the mandrel M when hot , the walls of which, being in such conditions more flexible than the ambient temperature , collapse or contract to reduce the transversal dimension of the mandrel M and favor the extraction of the cured compos ite material from the piece .
  • the depressuri zation temperature is higher than the glass transition temperature of the mandrel M, preferably equal to the glass transition temperature increased by 10 ° C .
  • thermosetting mixture for making the mandrel M comprises an oligomer and one or more reactive diluents .
  • the mixture of the polymeric material of the mandrel M is made in such a way that its own curing, which has already occurred during the manufacturing step of the mandrel M, is not impacted or is only marginal ly impacted during the curing o f the matrix of the composite material , so as to allow re-use of mandrel M for subsequent male mold laminations e . g . to obtain new units of the cured product of composite material .
  • the polymeric mixture for making the mandrel M comprises :
  • the acrylate oligomer is selected from polypentamethylene glycol polyglycidyl ether, polyethylene glycol polyglycidyl ether blend epoxy methacrylate , polypropylene glycol polyglycidyl ether, polyether polyester urethane methacrylate, polytetramethylene glycol polyglycidyl ether, polytrimethylpropane polyglycidyl ether, polyglycerol polyglycidyl ether with composite hydroxy methacrylates such as hydroxymethyl methacrylate or hydroxyethyl methacrylate , and mixtures thereof ;
  • the reactive diluent is selected from triethylene dimethacrylate , trimethylpropane trimethacrylate , monofunctional aliphatic urethane acrylate , and relative mixtures ;
  • a co-initiator selected from composites of onium, iodonium, sul fonium, phosphonium, thiol and mercaptan such as 2- mercaptobenzothiazole , mercapto-benzimidazole , 2- mercaptoethanol , Pentaerythritol tetrakis ( 3- mercaptopropionate ) , and mixtures thereof ; - from 1% to 3% by weight, with respect to the sum of 100% of oligomer and diluent, of a photo-initiator selected from bis-trimethylbenzoyl phenylphosphine oxide, Titanocene bis (trifluoromethanesulfonate) , titanocene dichloride, (4S,5S) -Chlorocyclopentadieny
  • a photo-initiator selected from bis-trimethylbenzoyl phenylphosphine oxide, Titanocen
  • Such mixtures are cured with a photolithographic process to obtain a hollow mandrel M whose walls are rigid at room temperature i.e. the glass transition temperature of the mixture which forms the mandrel M is at least 50°C.
  • such a combination is particularly suitable for manufacturing the mandrel M by means of both stereolithographic and extrusion 3D printing, as better described below.
  • the acrylate comprises one or more urethane reactive groups. In this way it is possible to give flexibility to the mandrel M.
  • the acrylate with a reactive group comprising urethane has a molecular weight between 60 g/mol and 150 g/mol.
  • the acrylate is di (trimethylolpropane) tetraacrylate.
  • Di ( trimethylolpropane ) tetraacrylate has the advantage of allowing fast reaction times compatible with the photopolymerization process in 3D printing (i.e. 20-40 s)
  • the reactive diluents, used in the mixture, participating in the reaction with the oligomer, favor the curing of the mixture during the production of the mandrel M by 3D printing.
  • Their choice allows to obtain a hardness between 60-90 ShoreA and a stiffness lower than or equal to 1.5 GPa at the temperature at which the depressurization of the mandrel M is carried out, e.g. Tg +10°-20°C, but at the same time the necessary stiffness (i.e. greater than 1.5 GPa) of the mixture at room temperature to allow male mold lamination.
  • the reactive diluents are acrylates and/or epoxides.
  • the choice between the use of an acrylate and/or an epoxide being linked to the degree of reactivity of the resin.
  • the reactive diluents are used when it is necessary to reduce the reactivity of the system while the acrylate group is chosen when it is necessary to increase the reactivity of the system.
  • the value of the glass transition temperature of the photocured resin in 3D printing, Tg must be compatible with the curing temperatures e.g. 120-180°C of the matrix of the composite material of the laminated product, during the production of the product itself. In fact, this parameter controls the deformability of the 3D printed mandrel M and, therefore, allows, as better indicated below, to exert an internal pressure on the layer during curing by applying an internal pressure to the core and thus deforming the walls .
  • the glass transition temperature of the photo-cured mixture for the mandrel M is selected on the basis of the curing temperature of the matrix so that the latter does not exceed by maximum of 30 ° C the glass transition temperature of the matrix . Given the most commonly used matrices in composite materials with elongated reinforcing fibers , the glass transition temperature is at least 50 ° C .
  • the use of acrylates and/or epoxides as reactive diluents makes it possible to ensure that the curing of the mixture occurs only during the manufacturing process of the mandrel M, i . e . during the 3D printing of the mandrel M, and not also in the oven or in the autoclave .
  • such diluents allow photo-curing of the mandrel M material e . g . during 3D printing, but not thermal curing, the flexibility of the walls of the M mandrel being achieved by exceeding the glass transition temperature .
  • the properties of the mandrel M are kept intact during the production of a hollow body, for example in a composite material , both at room temperature and during the curing of the composite material
  • the mandrel M when the mandrel M is subj ected to the temperatures typical of the curing processes of polymeric matrix composite materials e . g . preimpregnated, whether in the oven or in the autoclave , the curing of the resin of the mandrel M is prevented or does not progress signi ficantly . In this way the mandrel M does not modify its thermo-mechanical properties in the various production cycles of hollow bodies. For example, the mandrel M does not harden in a stable manner after passing through an oven or autoclave, thus allowing it to be reused for several processing cycles.
  • the reactive diluents belong to the group comprising: difunctional aliphatic urethane acrylate, triethyleneglicoldimethacrylate, or tricyclodecane dimethanol diacrylate, or a combination thereof is used.
  • difunctional aliphatic urethane acrylate triethyleneglicoldimethacrylate, tricyclodecane dimethanol diacrylate, or a combination thereof, has the advantage of providing a reactivity of the mixture in times ranging from 20-40 s.
  • the mixture also comprises a co-initiator for regulating the reactivity of the mixture, i.e. for making the curing of the mixture more or less rapid. In this way the rate of the polymerization reaction of the mixture is regulated.
  • the mixture comprises 4- acetamidothiophenol as co-initiator, from 1% to 5% by weight with respect to the total.
  • 4-acetamidothiophenol has the advantage of favoring photo-curing in the visible range.
  • the photo-initiator activates the curing by absorbing light where the mixture is to be cured in LCd machines.
  • LED-type light sources it is sufficient to provide traditional photocatalysts.
  • polymerization source is meant the light, produced by suitable means for activating the curing of the photo-initiator.
  • the light can be in variable spectra between 300 and 460 nm according to the type of photoinitiators used.
  • the polymerization source is, for example, the light produced by a laser in SLA 3D printing (stereolithography) , digital light projector in DLP (i.e. digital light processing) 3D printing, or one or more light sources in the case of printing 3D LCDs.
  • the polymerization light source can vary from 300 to 460 nm according to the type of technology used (i.e. SLA, DLP or LCD) .
  • the mixture comprises 2-hydroxy-2- methyl-l-phenyl-propan-l-one as photo-initiator from 1% to 5% by weight.
  • 2-hydroxy-2-methyl-l-phenyl-propan-l-one has the advantage of activating the photo-curing of methacrylate .
  • the mixture has the composition shown in Table 1.
  • the Tg of the mixture of Table 1 is 70°C and can be used with matrixes of the pre-impregnated composite with curing temperatures in the oven and/or autoclave higher than 70°C.
  • a hollow mandrel M produced with the above material has mechanical characteristics that vary with the temperature, e.g. at room temperature it has a modulus of elasticity greater than 1.5 GPa and a tensile strength greater than 40 MPa.
  • the material is more yielding e.g. the modulus of elasticity is less than or equal to 1.5 GPa and the elongation is greater than or equal to 30%.
  • thermo-mechanical properties of the hollow mandrel M produced with the mixture described above are exploited to obtain a core which can be used for the production of hollow components in composite material with polymer matrix, e.g. in carbon fiber.
  • a method based on male mold lamination on the hollow core is used for the production of a hollow component of composite material using the mandrel M described above.
  • this method comprises the step of preparing a layer of reinforcing fibers, such as for example carbon fiber, and resin or matrix, wherein said resin comprises an epoxy polymer and can also be extended to other types of thermosetting matrices such as for example, unsaturated polyester, ester cyanates , benzoxazines as long as with curing temperatures consistent with the Tg of the resin used for the mandrel M .
  • such method provides for the step of preparing a hollow mandrel M having its own three-dimensional shape provided by the process of forming of the same using the mixture described above , e . g . a parallelepiped, a cube , a sphere , etc . or other complex shape .
  • a counter-mold configured to house the hollow mandrel M and the at least one layer during the curing of the latter is also preferably provided .
  • this method provides for the step of applying, preferably at room temperature or lower but without the aid of cooling chambers or the like , the reinforcing layer and the resin on the mandrel M to perform the male mold lamination .
  • this operation is performed by applying a mechanical load on the reinforcing layer so as to make the latter adhere by compaction on the surface of the mandrel M e . g . to minimi ze the presence of air pockets interposed between the reinforcing layer and the surface of the mandrel M .
  • the latter maintains its three-dimensional shape defined as at the end of the forming process even under the application of a mechanical load of compaction of the reinforcing layer on a wall of the mandrel M .
  • the walls of the mandrel M are rigid enough that during lamination, e . g .
  • the pressure applied to the core is mainly supported by bending of the walls of the mandrel M, which, under the action of the load, do not deform or may present a minimal elastic deformation towards the cavity and, at the end of the lamination, such as to cause the mandrel M to maintain its three- dimensional shape unchanged with respect to that at the beginning of the lamination process .
  • the walls of the mandrel M can deform towards the cavity as a user pushes on the reinforcing layer but , thanks to the thermo-mechanical properties of the material of the mandrel M, when the lamination is finished, the three-dimensional shape of the mandrel M is substantially equal to that o f the mandrel M before applying the reinforcing layer thereon . Furthermore, any minimum deformation of the mandrel M caused by the application of pressure e . g . manual on the layer is recovered in an elastic way at the end of the male mold lamination . Sometimes , during lamination, a pressuri zation of the mandrel cavity M may be provided, e . g .
  • the method preferably includes the step of positioning the mandrel M with the layer in the counter-mold .
  • the counter-mold is configured to have a three-dimensional shape such as to reproduce the three-dimensional shape of the core , such that the walls of the counter-mold C with respect to the walls of the mandrel M are spaced apart by a predefined of fset and such as to generate a gap between the core and the counter-mold C .
  • this gap has a thickness , which will subsequently be the thickness of the product in composite material .
  • the hollow mandrel M can have shapes such as edges and/or flat faces and/or cusps and/or curvature discontinuities which are impossible to obtain using a pressuri zed bag .
  • the rigid hollow mandrel M according to the present invention it allows male mold lamination even in the absence of pres suri zation unlike a preformed bag or bladder whose walls are shaped but , being flexible at room temperature since they are made e . g . in rubber whose Tg is lower than 0 ° C, they would deform during application e . g . of a pre-preg during a male lamination in the absence of internal pressuri zation .
  • the thickness of the composite material product is considerably more homogeneous and/or it is possible to make edges or cusps with smaller radius than those achievable using a bladder .
  • the lamination of the layer is followed by thermal curing of the polymeric matrix of the layer, this curing having no impact on the curing of the hollow mandrel M .
  • curing of the hollow mandrel M takes place by exposure to a light , e . g . laser or ultraviolet light or at a curing temperature .
  • the hollow mandrel M is pressuri zed and, thanks to the achievement during the curing of the laminated product of a range of temperatures 10-20 ° C higher than the temperature of glass transition of the mandrel M, the action of this pressuri zation, being the walls of the hollow mandrel M more yielding or elastically deformable , is transmitted to the layer so as to compact it against the counter-mold C .
  • the hollow mandrel M is depressuri zed to obtain a collapse and/or contraction or the like and is thus extracted from the product . It is therefore possible , through this collapse or contraction, to also make a product of composite material with one or more undercuts .
  • the hollow mandrel M of the present invention is shaped by means of a 3D printing process , in particular a 3D tank printing with photopolymer and light source .
  • a 3D printing process in particular a 3D tank printing with photopolymer and light source .
  • each cured layer during printing of the hollow core is between 3 and 5 millimeters .
  • 3D printing for photopolymer is preferably LCD (masked stereolithography) because in this way surface roughness and surface finishes are obtainable such that , once trans ferred to the layer during curing, they do not require further processing of the cured product and the latter is separated from the collapsed or contracted core in a substantially ready-to-use condition, at least as regards finishing operations re ferring to the lateral surfaces of the composite material product .
  • Figures 5 to 7 illustrate a non-limiting embodiment of the single-body hollow mandrel M having a shape e . g . parallelepiped .
  • An internal volume of the mandrel M is fluidically connected to a pressure source via a connector G of the mandrel itsel f , for example via a fluid-tight connection e . g . spiked or similar .
  • the connector G is a narrower section with respect to the remaining portion of the mandrel M, as illustrated in the figures : in use , the mandrel M remains empty, e.g. without the possibility of housing stiffening components inside since the latter are incompatible with the dimensions of the G connector.
  • the mandrel is pressurized/depressurized.
  • the mandrel M is heated again above its Tg, preferably but not exclusively at the same temperature as the previous depressurization and/or pressurization in the presence of the hollow product of composite material. This heating is performed in the absence of the hollow product of composite material and, after the consequent cooling, the mandrel M is ready for a new lamination.

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

L'invention concerne un procédé de fabrication d'un produit creux par durcissement d'un matériau composite à matrice polymère et de fibres de renforcement qui comprend les étapes de : - fourniture d'un mandrin creux (M) en matériau polymère thermodurcissable ayant une température de transition vitreuse (Tg) supérieure ou égale à 50 °C, de préférence entre 50° et 110°C, de manière à être rigide à température ambiante avec une forme d'origine, le mandrin (M) comportant en outre un raccord pour mettre sous pression/dépressuriser le mandrin (M) au moyen d'un fluide ; - la stratification sur le moule mâle d'une ou plusieurs couches du matériau composite sur le mandrin rigide ; - le chauffage du mandrin avec la couche stratifiée à une température de durcissement de la matrice composite, la température de durcissement étant supérieure à ladite température de transition vitreuse (Tg) ; - la mise sous pression du mandrin de façon à maintenir ladite forme d'origine pendant l'étape de chauffage ; - la dépressurisation du mandrin à une température supérieure à ladite température de transition vitreuse (Tg).
PCT/IB2023/053028 2023-03-27 2023-03-27 Procédé de fabrication d'un composant creux en matériau composite à l'aide d'un mandrin pliable et réutilisable Ceased WO2024201099A1 (fr)

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PCT/IB2023/053028 WO2024201099A1 (fr) 2023-03-27 2023-03-27 Procédé de fabrication d'un composant creux en matériau composite à l'aide d'un mandrin pliable et réutilisable

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PCT/IB2023/053028 WO2024201099A1 (fr) 2023-03-27 2023-03-27 Procédé de fabrication d'un composant creux en matériau composite à l'aide d'un mandrin pliable et réutilisable

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7422714B1 (en) * 2001-01-24 2008-09-09 Cornerstone Research Group, Inc. Method of using a shape memory material as a mandrel for composite part manufacturing
WO2012064440A2 (fr) * 2010-11-11 2012-05-18 Spirit Aerosystems, Inc. Procédés et systèmes pour la co-liaison ou le co-durcissement de pièces composites à l'aide d'un appareil à polymère à mémoire de forme rigide/malléable
US20220314528A1 (en) * 2021-04-01 2022-10-06 Northrop Grumman Systems Corporation Methods of forming a mandrel for forming composite structures, methods of forming composite structures, and and related tools
US20220411560A1 (en) * 2021-06-28 2022-12-29 Covestro Llc Novel urethane acrylate composition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7422714B1 (en) * 2001-01-24 2008-09-09 Cornerstone Research Group, Inc. Method of using a shape memory material as a mandrel for composite part manufacturing
WO2012064440A2 (fr) * 2010-11-11 2012-05-18 Spirit Aerosystems, Inc. Procédés et systèmes pour la co-liaison ou le co-durcissement de pièces composites à l'aide d'un appareil à polymère à mémoire de forme rigide/malléable
US20220314528A1 (en) * 2021-04-01 2022-10-06 Northrop Grumman Systems Corporation Methods of forming a mandrel for forming composite structures, methods of forming composite structures, and and related tools
US20220411560A1 (en) * 2021-06-28 2022-12-29 Covestro Llc Novel urethane acrylate composition

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