EP2809502A2 - Device and method for producing a moulded part from a composite material - Google Patents

Device and method for producing a moulded part from a composite material

Info

Publication number
EP2809502A2
EP2809502A2 EP13706588.4A EP13706588A EP2809502A2 EP 2809502 A2 EP2809502 A2 EP 2809502A2 EP 13706588 A EP13706588 A EP 13706588A EP 2809502 A2 EP2809502 A2 EP 2809502A2
Authority
EP
European Patent Office
Prior art keywords
mold
cavity
resin
vacuum
counter
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Withdrawn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
EP13706588.4A
Other languages
German (de)
French (fr)
Inventor
Serge Luquain
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.)
Techni-Modul Engineering
Original Assignee
Techni-Modul Engineering
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 Techni-Modul Engineering filed Critical Techni-Modul Engineering
Publication of EP2809502A2 publication Critical patent/EP2809502A2/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Withdrawn legal-status Critical Current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
    • 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
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • 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
    • B29C33/0055—Moulds or cores; Details thereof or accessories therefor with incorporated overflow cavities
    • 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
    • B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
    • 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
    • B29C33/20—Opening, closing or clamping
    • B29C33/202—Clamping means operating on closed or nearly closed mould parts, the clamping means being independently movable of the opening or closing means
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • 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
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass

Definitions

  • the invention relates to a device, as well as a method for manufacturing a molded part made of a composite material.
  • composite material means a material comprising a resin (thermoplastic or thermosetting) and reinforcing fibers (for example glass fibers).
  • the resin constitutes the matrix of the composite material.
  • the matrix provides cohesion and orientation of the reinforcing fibers.
  • the matrix allows the transmission of the mechanical stresses to which the molded part is subjected.
  • the reinforcing fibers help to improve the strength and rigidity of the molded part.
  • the composite molded parts are shaped for a variety of applications, such as the manufacture of crankcases, boat hulls, bicycle frames, body parts, tanks, various sanitary articles, or more generally all industrial parts with very different shapes and more or less complex.
  • the RTM technique makes it possible to manufacture molded parts of small or large size. Injection molding is done with a rigid mold and counter mold. The reinforcing fibers are arranged in a cavity which is provided with the mold. The counter mold is fixed on the mold by a closing pressure obtained by means of a press or an autoclave. Then, the resin is injected by means of a low pressure pump (approximately 1 to 5 bar) through the reinforcing fibers until the cavity is completely filled. After curing the resin, the mold is opened and the part is demolded.
  • a low pressure pump approximately 1 to 5 bar
  • the moldings have forms of little or medium complexity
  • the infusion technique for the manufacture of a composite material molding consists of vacuuming, in a mold covered with a superposition of fabrics and consumables which constitute a drapery and whose last thickness is a vacuum cover, fibers dry reinforcement, then to impregnate through the injection and migration of a resin in these reinforcing fibers due to the maintenance of the vacuum.
  • the resin is then sucked by the vacuum created between the vacuum cover and the mold and thus penetrates the reinforcing fibers. Then, the vacuum is maintained during the polymerization of the resin, to ensure the pressurization of the reinforcing fibers. Vacuuming carried out before the injection of the resin makes it possible to compact the reinforcing fibers and to ensure that there is no air leakage.
  • the draping generally consists of the following elements: tearing fabric and demolding fabric, diffusion grid, diffusion tube, draining fabric, vacuum cover and putty, in order to ensure optimal impregnation of the resin within the fibers of the fabric. reinforcement.
  • the infusion is based in particular on the physical principle of the permeability of the reinforcing fibers
  • the permeability of the reinforcing fibers consists of:
  • the macroscopic permeability varies with the compression of the reinforcing fibers.
  • the microscopic permeability depends on the tension of surface of the impregnating resin. The higher the surface tension, the more the impregnation of the fibers by capillarity is reduced.
  • the viscosity of the impregnating resin is also an important parameter of the infusion: the lower the viscosity of the resin, the faster the infusion.
  • the vacuum pressurizing reinforcing fibers may be disturbed by the resin which has been infused. It is essential that the reinforcing fibers remain under pressure until the end of the polymerization so as not to affect the mechanical properties and geometry of the molded part that is desired. However, the resin can obstruct the draw point of the vacuum;
  • the face of the molded part which has been in contact with the draping does not have a smooth surface and free from defects, because the draping consists of flexible elements which do not make it possible to obtain a homogeneous surface.
  • the infusion technique provides a molded part having a single smooth outer surface and free of surface defects.
  • the present invention proposes to overcome the disadvantages inherent in the manufacture of a molded composite material from the known techniques that include the RTM and infusion and which were detailed above.
  • the present invention firstly relates to a device for manufacturing a molded part made of composite material, designed to overcome non-reusable materials and more expensive, such as fabrics or consumables, during the manufacture of the molded part, as is the case for the infusion technique, and while ensuring the mechanical properties of the molded part as good as those obtained with the infusion technique.
  • the device according to the invention is also designed to further have the advantage over the RTM technique of not requiring a means of closing the counter-mold on the mold of the press or autoclave type which are means which increase the cost of manufacturing a molded part made of composite material.
  • the present invention also relates to a method of manufacturing a molded part made of composite material implementing said device.
  • the device for manufacturing a molded part made of a composite material comprising a mixture of reinforcing fibers and a resin according to the invention comprises:
  • a mold in which is formed a cavity configured for the arrangement of the reinforcing fibers
  • a counter-mold which, intended to bear against the mold to close the cavity, is equi ped to the e ns a channel of introduction of the rés inedansla cav Institut, l ed it ca nal introducer being adapted to be connected to at least one source of resin supply;
  • the mold and the against-mold comprise respective bearing areas surrounding the cavity, these bearing zones comprising two peripheral sealing seals offset from one another, from the inside to the outside, delimiting a closing chamber which is connected to a vacuum source, said vacuum source putting the closure chamber in depression to ensure the plating of the mold against the mold.
  • the closure chamber is dimensioned according to the size of the molding, the pressure to be applied to the fibers and the injection pressure.
  • the pressure on the reinforcing fibers disposed in the cavity may be of the order of 0.25 MPa before the injection of the resin: this corresponds to the accumulation of the the force provided by the closure chamber which can be approximately 0.15 MPa and that of the cavity. And once the resin is injected into the cavity, only the effort of the closure chamber remains.
  • closure chamber makes it possible to dispense with a means for closing the mold against the mold of the press or autoclave type which are means which have the following drawbacks:
  • the resin may be a thermosetting resin or a thermoplastic resin. Preferably, it is a thermosetting resin.
  • depression of the cavity means adapted to introduce a residual vacuum of at least 200 mbar into the cavity of the mold, which corresponds to a vacuum of about 800 mbar.
  • the residual void in the cavity is at least 50 mbar, corresponding to a depression of about 950 mbar.
  • the resin from the supply source which may advantageously consist of a dosing pump system, is introduced into the cavity by the introduction channel.
  • the resin then impregnates the reinforcing fibers that have been placed in the cavity and is sucked by the extraction channel because of the depression of the cavity.
  • Resin is introduced into the cavity until an excess of resin exits through the extraction channel: at this stage, all the reinforcing fibers have been impregnated with the resin, because of the physical phenomena that are the macroscopic and microscopic permeability of these reinforcing fibers which have been detailed above for infusion.
  • the depression means of the cavity comprises a vacuum pump, a channel formed in the counter-mold or in the mold for the depression of the cavity and the extraction of the excess resin. out of the cavity, and a vacuum circuit having the shape of a pipe which connects the vacuum pump to the channel.
  • the tubing connecting the channel formed in the counter mold or in the mold to the vacuum pump is equipped with a buffer pot for collecting the resin extracted from the cavity.
  • the buffer pot thus prevents resin from drowning the empty pump.
  • the introduction channel and the extraction channel have a frustoconical shape. This provides the advantage of being able to easily remove from the mold by "demolding" the resin remained stored in these channels after the manufacture of the molded part and which will also polymerized. Thus, after the removal of this small amount of resin remaining in these channels in the counter-mold, the device is again ready for molding another piece of composite material.
  • the closure chamber is connected to the vacuum source by means of a vacuum circuit in the form of a tubing and a channel formed in the counterpart. -mold or in the mold.
  • the vacuum source is a vacuum pump.
  • This vacuum also called “closing vacuum”
  • the cavity vacuum circuit and the vacuum circuit of the closure chamber are arranged in parallel and converge upstream of the same vacuum pump.
  • the cavity depression circuit and the vacuum circuit of the closure chamber can be equipped with measuring means and means for regulating the pressure and the flow rate.
  • the closing gap is at least 300 mbar, which corresponds to a depression of about 700 mbar. Preferably, it is at least 200 mbar (corresponding to a depression of 800 mbar).
  • the mold and the counter mold can be made of a composite material, metal or any other suitable material for the manufacture of a mold that is within the reach of the skilled person.
  • the device further comprises at least one means for centering the mold against the mold.
  • the cavity may comprise an area in which the resin is introduced through the introduction channel. During the manufacturing process of the molded composite material, the reinforcing fibers are not arranged in this area, this ensures a homogeneous impregnation of the resin within the reinforcing fibers.
  • the present invention also relates to a method of manufacturing a molded part made of a composite material comprising a mixture of reinforcing fibers and a resin implementing a device as described above, which comprises:
  • the reinforcing fibers are arranged in the cavity of the device
  • a depression is instituted in the cavity with the depression means of the cavity and a closing vacuum is established in the closure chamber;
  • thermosetting the resin
  • step h) optionally, the molded part obtained in step h) is cut.
  • the closing gap is selected such that the mold and counter-mold remain in contact during steps d) to f) of the manufacturing process.
  • This setting of the closing gap will depend in particular on the nature of the joints of the device, the expansion of the reinforcing fibers, as well as the disengagement of the closure chamber. Of course, the parameterization of this closure vacuum is perfectly within the reach of the skilled person.
  • a vacuum of at least 300 mbar, preferably at least 200 mbar, is introduced into the closure chamber.
  • a depression in the cavity of at least 800 mbar, preferably at least 950 mbar, is instituted with the depression means of the cavity.
  • step c) is carried out by introducing a depression in the cavity with the means of depression of the cavity of at least at least 800 mbar and a closing vacuum in the closing chamber of at least 300 mbar.
  • the manufacturing method according to the invention does not require fabrics or consumables which are expensive materials and disposable.
  • the cost of manufacturing molded parts with the process according to the invention is therefore reduced by the franking of these materials and the labor costs inherent in their careful handling.
  • the manufacturing method according to the invention can be automated.
  • the resin may be a thermosetting resin. It is advantageously chosen from the group consisting of:
  • unsaturated polyester resins (optionally mixed with fillers such as calcium carbonate, so as to improve the appearance of the molded part and reduce its cost of manufacture);
  • vinylester resins are used with fillers, catalysts and setting accelerators;
  • epoxy resins Polymerized pieces obtained from epoxy resins have excellent fatigue resistance;
  • the resin is a thermoplastic resin. It is advantageously chosen from the group consisting of polyether ether ketone, polyamides, polyetherimides, polyethylenes, polypropenes and polyphenylene sulfides.
  • the resin used during the manufacturing process according to the invention is a thermosetting resin.
  • the resin may further comprise fillers and / or pigments.
  • fillers is understood to mean any inert, mineral or vegetable substance which, when added to the base resin, makes it possible to modify its mechanical, electrical or thermal properties, to improve the surface appearance, or even to reduce the cost of the molded part.
  • the choice of load depends on the desired mechanical properties of the molded part. It can be organic fillers such as cellulosic fillers, wood flours, fruit and stone bark flours, vegetable fibers, starches, or mineral fibers. such as carbonates, silicas, talcs, clays and alumino-silicates, or oxides (oxides of zinc, magnesium, titanium and antimony, beryllium), alumina, ceramics, glass powders, hollow glass beads, glass microspheres or even carbon black.
  • organic fillers such as cellulosic fillers, wood flours, fruit and stone bark flours, vegetable fibers, starches, or mineral fibers.
  • the reinforcing fibers are advantageously chosen from glass fibers which are obtained from sand (silica) and additives (alumina, carbonate of lime, magnesia, boron oxide). It can also be carbon fibers or aramid.
  • glass fibers are used as reinforcing fibers. They may be in the form of mats, preforms or possibly fabrics.
  • the volume ratio of reinforcement can reach up to about 65%.
  • the manufacturing process has the advantage of not implementing expensive mechanical means such as an autoclave or a press to maintain plated the counter-mold on the mold.
  • the vacuum of the closing chamber and the depression of the cavity are carried out by means of the same vacuum pump, the cavity depression and setting circuits.
  • vacuum chamber of the closure chamber being respectively equipped with measuring means (eg manometer) and pressure and flow control (eg valve).
  • the molded parts according to the manufacturing method of the invention have the following advantageous characteristics which are very similar to those obtained with the infusion technique. They can be:
  • the moldings obtained according to the manufacturing method of the present invention exhibit the advantage of having two smooth external faces and free of surface defects.
  • the manufacturing method according to the invention is particularly suitable for the manufacture of crankcases, boat hulls, bicycle frames, bodywork elements, tanks, various sanitary articles, or more generally any industrial parts. with very different forms and more or less complex.
  • FIG. 1 represents a schematic view of a device for manufacturing a molded part made of composite material according to the invention, in which the portion of the device representing the mold and the counter-mold is seen in section.
  • Figure 2a is a view from above and in section of the mold according to a first embodiment of the invention.
  • Figure 2b is a view from above and in section of the mold according to a second embodiment of the invention.
  • thermosetting resin 3 which is a thermosetting resin is stored in a reserve pot 13.
  • the thermosetting resin 3 is conveyed to the introduction channel 9 formed in the counter-mold 6 by a pipe 19.
  • a cavity 5 has been formed in the mold 4.
  • the reinforcing fibers 2 are arranged in the cavity 5.
  • the mold 4 and the counter-mold 6 comprise respective bearing zones which surround the cavity 5. These bearing zones comprise two peripheral seals 1 1, 12 which delimit a closing chamber 22.
  • the seal sealing 12 also has the function of preventing the thermosetting resin from spreading out of the cavity 5.
  • the closing chamber 22 is connected to the vacuum pump 7 by means of the pipe 21 and the channel 8 formed in the counter mold 6.
  • the tubing 21 is equipped with a manometer 16 measuring the closing vacuum and a valve 18 for regulating the pressure and the flow.
  • the counter-mold 6 is equipped with a channel 1 0 for extracting the thermosetting resin 3.
  • a tubing 20 connects the extraction channel 10 to a buffer pot 14 which makes it possible to avoid flooding the vacuum pump 7 with thermosetting resin 3, when the cavity 5 is depressurized and the thermosetting resin 3 is introduced into it.
  • the tubing 20 is equipped with a manometer 15 measuring the depression within the cavity 5 and a valve 17 ensuring the regulation of pressure and flow.
  • the tubing 20 connects the vacuum pump 7 to the channel 10.
  • the vacuum can be established in a controlled manner in the cavity 5 and in the closure chamber 22.
  • FIGS. 2a and 2b show two different embodiments of the zone 23 of which the cavity 5 is provided.
  • the reinforcing fibers 2 are disposed in the cavity 5 with the exception of the zone 23.
  • the thermosetting resin 3 is introduced into the zone 23 with the introduction channel 9. These two embodiments allow a homogeneous impregnation of all the reinforcing fibers 2 due to the control of the flow of the thermosetting resin 3 which migrates over the entire width of the cavity 5 (embodiment shown in Figure 2a) or all around the cavity 5 (embodiment shown in Figure 2b). There is no preferential path of the thermosetting resin 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention concerns a device (1) for producing a moulded part from a composite material comprising a mixture of reinforcement fibres (2) and a resin (3), said device (1) comprising: - a mould (4) wherein a recess (5) is provided, configured for the arrangement of the fibres (2); - a counter-mould (6) which is provided with at least one channel (9) for introducing the resin (3) into the recess (5), and which is intended to rest against the mould (4) in order to close the recess (5); - means for positioning and securing the counter-mould (6) on the mould (4); - at least one means (7) for depressurising the recess (5) - the mould (4) and the counter-mould (6) comprising respective support areas surrounding the recess (5), which comprise two seals delimiting a closing chamber (22). The invention also concerns a method for producing a moulded part from a composite material implementing the device (1).

Description

Dispositif et procédé de fabrication d'une pièce moulée en un matériau composite  Device and method for manufacturing a molded part made of a composite material
L'invention concerne un dispositif, ainsi qu'un procédé de fabrication d'une pièce moulée en un matériau composite. The invention relates to a device, as well as a method for manufacturing a molded part made of a composite material.
Dans le cadre de la présente invention, on entend par matériau composite, un matériau comprenant une résine (thermoplastique ou thermodurcissable) et des fibres de renfort (par exemple des fibres de verre). La résine constitue la matrice du matériau composite. La matrice assure la cohésion et l'orientation des fibres de renfort. De plus, la matrice permet la transmission des sollicitations mécaniques auxquelles est soumise la pièce moulée. Les fibres de renfort contribuent à améliorer la résistance mécanique et la rigidité de la pièce moulée.  In the context of the present invention, the term "composite material" means a material comprising a resin (thermoplastic or thermosetting) and reinforcing fibers (for example glass fibers). The resin constitutes the matrix of the composite material. The matrix provides cohesion and orientation of the reinforcing fibers. In addition, the matrix allows the transmission of the mechanical stresses to which the molded part is subjected. The reinforcing fibers help to improve the strength and rigidity of the molded part.
Les pièces moulées en matériau composite sont façonnées pour des applications très variées, telles que la fabrication de carters, de coques de bateau, de cadres de vélo, d'éléments de carrosserie, de cuves, de divers articles sanitaires, ou encore plus généralement de toutes pièces industrielles aux formes très diverses et plus ou moins complexes.  The composite molded parts are shaped for a variety of applications, such as the manufacture of crankcases, boat hulls, bicycle frames, body parts, tanks, various sanitary articles, or more generally all industrial parts with very different shapes and more or less complex.
Plusieurs technologies sont connues pour fabriquer des pièces moulées en matériau composite, parmi lesquelles on peut citer :  Several technologies are known to manufacture composite molded parts, among which may be mentioned:
le moulage par injection (plus communément dénommé injection molding (more commonly referred to as
« RTM » : Resin transfer Molding), et "RTM": Resin transfer Molding), and
l'infusion.  infusion.
La technique du RTM permet de fabriquer des pièces moulées de petite ou de grande taille. Le moulage par injection s'effectue avec un moule et un contre-moule rigides. Les fibres de renfort sont disposées dans une cavité dont est pourvu le moule. Le contre-moule est fixé sur le moule grâce à une pression de fermeture obtenue au moyen d'une presse ou d'un autoclave. Ensuite, la résine est injectée au moyen d'une pompe basse pression (1 à 5 bars environ) à travers les fibres de renfort jusqu'au remplissage complet de la cavité. Après le durcissement de la résine, le moule est ouvert et la pièce est démoulée.  The RTM technique makes it possible to manufacture molded parts of small or large size. Injection molding is done with a rigid mold and counter mold. The reinforcing fibers are arranged in a cavity which is provided with the mold. The counter mold is fixed on the mold by a closing pressure obtained by means of a press or an autoclave. Then, the resin is injected by means of a low pressure pump (approximately 1 to 5 bar) through the reinforcing fibers until the cavity is completely filled. After curing the resin, the mold is opened and the part is demolded.
Les avantages de la technique du RTM sont les suivants : une qualité constante des pièces moulées ;  The advantages of the RTM technique are: consistent quality of molded parts;
- une cadence de production élevée ; des pièces moulées de grande dimension (jusqu'à environ 7 m2) ; - a high production rate; large molded parts (up to about 7 m 2 );
une automatisation du procédé de fabrication.  an automation of the manufacturing process.
Cependant, la technique du RTM présente les inconvénients suivants :  However, the RTM technique has the following drawbacks:
les pièces moulées ont des formes peu ou moyennement complexes ;  the moldings have forms of little or medium complexity;
il est nécessaire d'effectuer des finitions après le démoulage ;  it is necessary to finish after demolding;
- une bonne reproductibilité de la fabrication de la pièce moulée ;  - good reproducibility of the manufacture of the molded part;
La technique d'infusion pour la fabrication de pièce moulée en matériau composite consiste à mettre sous vide, dans un moule recouvert d'une superposition de tissus et de consommables qui constituent un drapage et dont la dernière épaisseur est une bâche à vide, des fibres de renfort sèches, puis à les imprégner grâce à l'injection et à la migration d'une résine au sein de ces fibres de renfort du fait du maintien du vide. La résine est alors aspirée par la dépression créée entre la bâche à vide et le moule et pénètre ainsi dans les fibres de renfort. Ensuite, le vide est maintenu pendant la polymérisation de la résine, afin de garantir la mise en pression des fibres de renfort. La mise sous vide réalisée avant l'injection de la résine permet de compacter les fibres de renfort et de s'assurer qu'il n'y a pas de fuite d'air. Une fois le thermo-durcissement de la résine achevé, le drapage est retiré et la pièce moulée est ensuite retirée du moule.  The infusion technique for the manufacture of a composite material molding consists of vacuuming, in a mold covered with a superposition of fabrics and consumables which constitute a drapery and whose last thickness is a vacuum cover, fibers dry reinforcement, then to impregnate through the injection and migration of a resin in these reinforcing fibers due to the maintenance of the vacuum. The resin is then sucked by the vacuum created between the vacuum cover and the mold and thus penetrates the reinforcing fibers. Then, the vacuum is maintained during the polymerization of the resin, to ensure the pressurization of the reinforcing fibers. Vacuuming carried out before the injection of the resin makes it possible to compact the reinforcing fibers and to ensure that there is no air leakage. Once the thermosetting of the resin is complete, the draping is removed and the molded part is then removed from the mold.
Le drapage est généralement constitué des éléments suivants : tissu d'arrachage et tissu de démoulage, grille de diffusion, tube de diffusion, tissu drainant, bâche à vide et mastic, afin d'assurer une imprégnation optimale de la résine au sein des fibres de renfort.  The draping generally consists of the following elements: tearing fabric and demolding fabric, diffusion grid, diffusion tube, draining fabric, vacuum cover and putty, in order to ensure optimal impregnation of the resin within the fibers of the fabric. reinforcement.
L'infusion est notamment basée sur le principe physique de la perméabilité des fibres de renfort ;  The infusion is based in particular on the physical principle of the permeability of the reinforcing fibers;
La perméabilité des fibres de renfort consiste en :  The permeability of the reinforcing fibers consists of:
la perméabilité macroscopique (espace entre les fibres) ; la perméabilité microscopique (ou capillarité).  macroscopic permeability (space between fibers); microscopic permeability (or capillarity).
La perméabilité macroscopique varie avec la compression des fibres de renfort. La perméabilité microscopique dépend de la tension de surface de la résine d'imprégnation. Plus la tension de surface est forte, plus l'imprégnation des fibres par capillarité est réduite. The macroscopic permeability varies with the compression of the reinforcing fibers. The microscopic permeability depends on the tension of surface of the impregnating resin. The higher the surface tension, the more the impregnation of the fibers by capillarity is reduced.
La viscosité de la résine d'imprégnation est aussi un paramètre important de l'infusion : plus la viscosité de la résine est faible, plus l'infusion est rapide.  The viscosity of the impregnating resin is also an important parameter of the infusion: the lower the viscosity of the resin, the faster the infusion.
Les avantages de la technique d'infusion sont les suivants :  The advantages of the infusion technique are:
une bonne reproductibilité de la fabrication de la pièce moulée ;  a good reproducibility of the manufacture of the molded part;
une réalisation de pièces de grande taille et de forme complexe en une seule étape ;  an embodiment of large parts and complex shape in a single step;
un taux volumique de renforcement optimal et maîtrisé, de l'ordre de 50 à 60% en volume, ainsi les pièces obtenues par infusion exhibent de très bonnes propriétés mécaniques ;  a volume ratio of optimal and controlled reinforcement, of the order of 50 to 60% by volume, and the parts obtained by infusion exhibit very good mechanical properties;
Cependant, les difficultés et inconvénients de la technique d'infusion sont les suivants :  However, the difficulties and disadvantages of the infusion technique are as follows:
l a n écessité de matériaux non réutilisables qui sont constitués par les tissus et consommables du drapage, ainsi que leur pose minutieuse et non automatisée. Cela implique des coûts de matériaux et de main-d'œuvre conséquents et qui dépendent des dimensions des pièces moulées ;  the need for non-reusable materials consisting of drapery fabrics and consumables, as well as their meticulous and non-automated laying. This implies material and labor costs that are substantial and that depend on the dimensions of the castings;
une faible cadence de production, du fait des opérations minutieuses de la pose du drapage ;  a low rate of production, due to the minute operations of laying the drapery;
une épaisseur de la pièce moulée limitée, car l'épaisseur doit être suffisamment faible pour que la résine pénètre correctement dans tout le volume occupé par les fibres de renfort uniquement par une aspiration par le vide ;  a limited thickness of the molded part, since the thickness must be sufficiently small so that the resin penetrates correctly into the entire volume occupied by the reinforcing fibers solely by vacuum suction;
le contrôle du vide. En effet, le vide de mise en pression des fibres de renfort peut être perturbé par de la résine qui a été infusée. Il est primordial que les fibres de renfort demeurent sous pression jusqu'à la fin de la polymérisation pour ne pas porter atteinte aux propriétés mécaniques et à la géométrie de la pièce moulée que l'on souhaite obtenir. Or, la résine peut obstruer le point de tirage du vide ;  vacuum control. Indeed, the vacuum pressurizing reinforcing fibers may be disturbed by the resin which has been infused. It is essential that the reinforcing fibers remain under pressure until the end of the polymerization so as not to affect the mechanical properties and geometry of the molded part that is desired. However, the resin can obstruct the draw point of the vacuum;
la nécessité de l 'homogénéité de la température de la polymérisation sur toute la pièce moulée ; objectif d'autant plus difficile à atteindre que la face de la pièce moulée en contact avec le drapage est soumise à la température de l'air environnant ; the need for the homogeneity of the temperature of the polymerization on the whole molded part; goal all the more more difficult to achieve than the face of the molded part in contact with the draping is subjected to the temperature of the surrounding air;
la face de la pièce moulée qui a été en contact avec le drapage n'a pas une surface lisse et exempte de défauts, car le drapage est constitué d'éléments souples qui ne permettent pas d'obtenir une surface homogène.  the face of the molded part which has been in contact with the draping does not have a smooth surface and free from defects, because the draping consists of flexible elements which do not make it possible to obtain a homogeneous surface.
Ainsi, la technique de l'infusion permet d'obtenir une pièce moulée présentant une seule face externe lisse et exempte de défauts de surface.  Thus, the infusion technique provides a molded part having a single smooth outer surface and free of surface defects.
La présente invention se propose de pallier les inconvénients inhérents à la fabrication d'une pièce moulée en matériau composite à partir des techniques connues que sont notamment le RTM et l'infusion et qui ont été détaillés ci-dessus.  The present invention proposes to overcome the disadvantages inherent in the manufacture of a molded composite material from the known techniques that include the RTM and infusion and which were detailed above.
En effet, la présente invention a pour premier objet un dispositif de fabrication d'une pièce moulée en matériau composite, conçu de manière à s'affranchir de matériaux non réutilisables et de surcroît onéreux, tels que des tissus ou des consommables, au cours de la fabrication de la pièce moulée, comme cela est le cas pour la technique de l'infusion, et ce tout en garantissant des propriétés mécaniques de la pièce moulée aussi bonnes que celles obtenues avec la technique d'infusion.  Indeed, the present invention firstly relates to a device for manufacturing a molded part made of composite material, designed to overcome non-reusable materials and more expensive, such as fabrics or consumables, during the manufacture of the molded part, as is the case for the infusion technique, and while ensuring the mechanical properties of the molded part as good as those obtained with the infusion technique.
Le dispositif selon l'invention est aussi conçu pour présenter en outre l'avantage par rapport à la technique du RTM de ne pas nécessiter de moyen de fermeture du contre-moule sur le moule du type presse ou autoclave qui sont des moyens qui augmentent le coût de fabrication d'une pièce moulée en matériau composite.  The device according to the invention is also designed to further have the advantage over the RTM technique of not requiring a means of closing the counter-mold on the mold of the press or autoclave type which are means which increase the cost of manufacturing a molded part made of composite material.
La présente invention a aussi pour objet un procédé de fabrication d'une pièce moulée en matériau composite mettant en œuvre ledit dispositif.  The present invention also relates to a method of manufacturing a molded part made of composite material implementing said device.
Le dispositif de fabrication d'une pièce moulée en un matériau composite comprenant un mélange de fibres de renfort et d'une résine selon l'invention comprend :  The device for manufacturing a molded part made of a composite material comprising a mixture of reinforcing fibers and a resin according to the invention comprises:
un moule dans lequel est ménagée une cavité configurée pour la disposition des fibres de renfort ;  a mold in which is formed a cavity configured for the arrangement of the reinforcing fibers;
un contre-moule qui, destiné à venir en appui sur le moule pou r fermer la cavité, est équ i pé d'au moi ns un canal d'introduction d e l a rés i n e d a n s l a cav ité, l ed it ca n a l d'introduction étant adapté pour être relié à au moins une source d'approvisionnement en résine ; a counter-mold which, intended to bear against the mold to close the cavity, is equi ped to the e ns a channel of introduction of the rés inedansla cav ité, l ed it ca nal introducer being adapted to be connected to at least one source of resin supply;
des moyens de positionnement et de fixation du contre- moule sur le moule ;  means for positioning and fixing the mold against the mold;
- au moins un moyen de mise en dépression de la cavité pour assurer l'introduction de la résine dans celle-ci et au moins un canal d'extraction de la résine en excès hors de la cavité, et se caractérise en ce que le moule et le contre-moule comportent des zones d'appui respectives entourant la cavité, ces zones d'appui comprenant deux joints d'étanchéité périphériques décalés l'un par rapport à l'autre, de l'intérieur vers l'extérieur, délimitant une chambre de fermeture qui est reliée à une source de vide, ladite source de vide mettant en dépression la chambre de fermeture pour assurer le plaquage du contre-moule sur le moule.  at least one means for depression of the cavity to ensure the introduction of the resin therein and at least one channel for extracting the excess resin out of the cavity, and is characterized in that the mold and the against-mold comprise respective bearing areas surrounding the cavity, these bearing zones comprising two peripheral sealing seals offset from one another, from the inside to the outside, delimiting a closing chamber which is connected to a vacuum source, said vacuum source putting the closure chamber in depression to ensure the plating of the mold against the mold.
De m a n ière ava ntag eu se , la chambre de fermeture est dimensionnée en fonction de la taille de la pièce à mouler, de la pression que l'on souhaite mettre sur les fibres et de la pression d'injection.  As a result, the closure chamber is dimensioned according to the size of the molding, the pressure to be applied to the fibers and the injection pressure.
Avec la chambre de fermeture que comprend le dispositif selon l'invention, la pression sur les fibres de renfort disposées dans la cavité peut être de l'ordre de 0,25MPa avant l'injection de la résine : cela correspond au cumul de l'effort apporté par la chambre de fermeture qui peut s'élever à environ 0,15 MPa et par celle de la cavité. Et une fois la résine injectée dans la cavité, seul subsiste l'effort de la chambre de fermeture.  With the closure chamber that comprises the device according to the invention, the pressure on the reinforcing fibers disposed in the cavity may be of the order of 0.25 MPa before the injection of the resin: this corresponds to the accumulation of the the force provided by the closure chamber which can be approximately 0.15 MPa and that of the cavity. And once the resin is injected into the cavity, only the effort of the closure chamber remains.
Ainsi, la chambre de fermeture permet de s'affranchir d'un moyen de fermeture du contre-moule sur le moule du type presse ou autoclave qui sont des moyens qui présentent les inconvénients suivants :  Thus, the closure chamber makes it possible to dispense with a means for closing the mold against the mold of the press or autoclave type which are means which have the following drawbacks:
ils augmentent le coût de fabrication d'une pièce moulée en matériau composite, du fait de leur coût élevé ;  they increase the cost of manufacturing a molded part made of composite material, because of their high cost;
i ls n e sont pas aisément manipulables et nécessitent beaucoup d'étapes de manutention;  they are not easily manipulated and require many handling steps;
- ils risquent d'abîmer le moule et le contre-moule lors de leur utilisation pour fabriquer la pièce moulée, et de surcroît lorsqu'ils ne sont pas correctement paramétrés ;  - They may damage the mold and counter mold during their use to manufacture the molded part, and moreover when they are not correctly set;
ils sont encombrants ;  they are bulky;
ils nécessitent un investissement important.  they require a significant investment.
Avec une chambre de fermeture que comprend le dispositif selon l'invention, une fois le contre-moule mis en place sur le moule, il suffit seulement de mettre sous vide la chambre de fermeture : ce qui est simple et rapide de mise en œuvre, et ce sans le risque d'abîmer le moule et le contre- moule. With a closing chamber that comprises the device according to the invention, once the counter-mold set up on the mold, it is sufficient only to put the closure chamber under vacuum: this is quick and easy to implement, without the risk of damaging the mold and the counter-mold.
On comprend ainsi aisément tous les avantages que présente le dispositif selon l'invention qui comprend de manière innovante une chambre de fermeture en substitution d'un moyen de fermeture du contre-moule sur le moule de type presse ou autoclave.  Thus, it is easy to understand all the advantages of the device according to the invention which comprises, in an innovative manner, a closure chamber in substitution for a closing means of the counter-mold on the mold of the press or autoclave type.
La résine peut être une résine thermodurcissable ou une résine thermoplastique. De manière préférée, il s'agit d'une résine thermodurcissable.  The resin may be a thermosetting resin or a thermoplastic resin. Preferably, it is a thermosetting resin.
Dans le cadre de la présente invention, on entend par moyen de mise en dépression de la cavité, un moyen adapté pour instaurer au sein de la cavité du moule un vide résiduel d'au moins 200 mbar, ce qui correspond à une dépression d'environ 800 mbar. De préférence, le vide résiduel régnant dans la cavité est d'au moins 50 mbar, correspondant à une mise en dépression d'environ 950 mbar.  In the context of the present invention, by means of depression of the cavity is meant means adapted to introduce a residual vacuum of at least 200 mbar into the cavity of the mold, which corresponds to a vacuum of about 800 mbar. Preferably, the residual void in the cavity is at least 50 mbar, corresponding to a depression of about 950 mbar.
Lorsque la cavité est mise en dépression, la résine provenant de la source d'approvisionnement qui peut consister avantageusement en un système à pompes doseuses, est introduite dans la cavité par le canal d'introduction. La résine imprègne alors les fibres de renfort qui ont été disposées dans la cavité et est aspirée par le canal d'extraction du fait de la mise en dépression de la cavité. On introduit de la résine dans la cavité jusqu'à ce qu'un excès de résine ressorte par le canal d'extraction : à ce stade, toutes les fibres de renfort ont été imprégnées de la résine, du fait des phénomènes physiques que sont la perméabilité macroscopique et microscopique de ces fibres de renfort qui ont été détaillés ci-dessus pour l'infusion.  When the cavity is depressurized, the resin from the supply source which may advantageously consist of a dosing pump system, is introduced into the cavity by the introduction channel. The resin then impregnates the reinforcing fibers that have been placed in the cavity and is sucked by the extraction channel because of the depression of the cavity. Resin is introduced into the cavity until an excess of resin exits through the extraction channel: at this stage, all the reinforcing fibers have been impregnated with the resin, because of the physical phenomena that are the macroscopic and microscopic permeability of these reinforcing fibers which have been detailed above for infusion.
De manière préférée, le moyen de mise en dépression de la cavité comprend une pompe à vide, un canal ménagé dans le contre-moule ou dans le moule servant à la mise en dépression de la cavité et à l'extraction de la résine en excès hors de la cavité, et un circuit de mise en dépression présentant la forme d'une tubulure qui relie la pompe à vide au canal.  Preferably, the depression means of the cavity comprises a vacuum pump, a channel formed in the counter-mold or in the mold for the depression of the cavity and the extraction of the excess resin. out of the cavity, and a vacuum circuit having the shape of a pipe which connects the vacuum pump to the channel.
Avantageusement, la tubulure reliant le canal ménagé dans le contre-moule ou dans le moule à la pompe à vide est équipée d'un pot tampon destiné à recueillir la résine extraite de la cavité. Le pot tampon permet ainsi d'éviter que de la résine ne noie la pompe vide.  Advantageously, the tubing connecting the channel formed in the counter mold or in the mold to the vacuum pump is equipped with a buffer pot for collecting the resin extracted from the cavity. The buffer pot thus prevents resin from drowning the empty pump.
Selon un mode de réalisation de l'invention, le canal d'introduction et le canal d'extraction présentent une forme tronconique. Cela procure l'avantage de pouvoir retirer aisément du contre-moule par « démoulage » la résine demeurée stockée dans ces canaux à l'issue de la fabrication de la pièce moulée et qui aura aussi polymérisé. Ainsi, après le retrait de cette faible quantité de résine restante dans ces canaux ménagés dans le contre-moule, le dispositif est à nouveau prêt pour le moulage d'une autre pièce en matériau composite. According to one embodiment of the invention, the introduction channel and the extraction channel have a frustoconical shape. This provides the advantage of being able to easily remove from the mold by "demolding" the resin remained stored in these channels after the manufacture of the molded part and which will also polymerized. Thus, after the removal of this small amount of resin remaining in these channels in the counter-mold, the device is again ready for molding another piece of composite material.
Sel on u n mode de réal isation avantageux de l'invention , la chambre de fermeture est reliée à la source de vide au moyen d'un circuit de mise sous vide présentant la forme d'une tubulure et d'un canal ménagé dans le contre-moule ou dans le moule.  In an advantageous embodiment of the invention, the closure chamber is connected to the vacuum source by means of a vacuum circuit in the form of a tubing and a channel formed in the counterpart. -mold or in the mold.
De préférence, la source de vide est une pompe à vide. Ce vide, aussi appelé « vide de fermeture », peut être obtenu avec la même pompe à vide que celle utilisée pour la mise en dépression de la cavité. C'est pourquoi, de manière avantageuse, le circuit de mise en dépression de la cavité et le circuit de la mise sous vide de la chambre de fermeture sont disposés en parallèle et convergent en amont de la même pompe à vide.  Preferably, the vacuum source is a vacuum pump. This vacuum, also called "closing vacuum", can be obtained with the same vacuum pump that used for the depression of the cavity. This is why, advantageously, the cavity vacuum circuit and the vacuum circuit of the closure chamber are arranged in parallel and converge upstream of the same vacuum pump.
En outre, le circuit de mise en dépression de la cavité et le circuit de la mise sous vide de la chambre de fermeture peuvent être équipés de moyens de mesure et de moyens de régulation de la pression et du débit.  In addition, the cavity depression circuit and the vacuum circuit of the closure chamber can be equipped with measuring means and means for regulating the pressure and the flow rate.
Avantageusement, le vide de fermeture est d'au moins 300 mbar, ce qui correspond à une dépression d'environ 700 mbar. De manière préférée, il est d'au moins 200 mbar (correspondant à une dépression de 800 mbar).  Advantageously, the closing gap is at least 300 mbar, which corresponds to a depression of about 700 mbar. Preferably, it is at least 200 mbar (corresponding to a depression of 800 mbar).
Le moule et le contre-moule peuvent être réalisés en un matériau composite, métallique ou tout autre matériau adéquat pour la fabrication d'un moule qui est à la portée de l'homme du métier.  The mold and the counter mold can be made of a composite material, metal or any other suitable material for the manufacture of a mold that is within the reach of the skilled person.
Selon un mode de réalisation très avantageux du dispositif selon l'invention, il comprend en outre au moins un moyen de centrage du contre- moule sur le moule.  According to a very advantageous embodiment of the device according to the invention, it further comprises at least one means for centering the mold against the mold.
La cavité peut comprendre une zone dans laquelle est introduite la résine par le canal d'introduction . Au cours du procédé de fabrication de la pièce moulée en matériau composite, les fibres de renfort ne sont pas disposées dans cette zone, cela assure une imprégnation homogène de la résine au sein des fibres de renfort.  The cavity may comprise an area in which the resin is introduced through the introduction channel. During the manufacturing process of the molded composite material, the reinforcing fibers are not arranged in this area, this ensures a homogeneous impregnation of the resin within the reinforcing fibers.
La présente invention concerne aussi un procédé de fabrication d'une pièce moulée en un matériau composite comprenant un mélange de fibres de renfort et d'une résine mettant en œuvre un dispositif tel que décrit ci- dessus, qui comprend : The present invention also relates to a method of manufacturing a molded part made of a composite material comprising a mixture of reinforcing fibers and a resin implementing a device as described above, which comprises:
a) on dispose des fibres de renfort dans la cavité du dispositif ;  a) the reinforcing fibers are arranged in the cavity of the device;
b) on dépose le contre-moule sur le moule ;  b) depositing the counter-mold on the mold;
c) on instaure une dépression dans la cavité avec le moyen de mise en dépression de la cavité et on instaure un vide de fermeture dans la chambre de fermeture ;  c) a depression is instituted in the cavity with the depression means of the cavity and a closing vacuum is established in the closure chamber;
d) on introduit de la résine dans la cavité tout en maintenant la dépression dans la cavité et le vide de fermeture dans la chambre de fermeture ; e) on arrête la mise en dépression de la cavité lorsqu'un excès de résine sort de la cavité par le canal ;  d) introducing resin into the cavity while maintaining the depression in the cavity and the closing vacuum in the closure chamber; e) the depression of the cavity is stopped when an excess of resin leaves the cavity through the channel;
f) on thermo-durcit la résine ;  f) thermosetting the resin;
g) on désolidarise le contre-moule du moule ;  g) the counter mold is detached from the mold;
h) on démoule la pièce moulée ;  h) the molded part is demolded;
i) optionnellement, on découpe la pièce moulée obtenue à l'étape h).  i) optionally, the molded part obtained in step h) is cut.
Le vide de fermeture est choisi de telle manière que le moule et le contre-moule demeurent en contact pendant les étapes d) à f) du procédé de fabrication. Ce paramétrage du vide de fermeture va dépendre notamment de la nature des joints du dispositif, du foisonnement des fibres de renfort, ainsi que du d imensionnement de la chambre de fermeture. Bien entendu, le paramétrage de ce vide de fermeture est parfaitement à la portée de l'homme du métier.  The closing gap is selected such that the mold and counter-mold remain in contact during steps d) to f) of the manufacturing process. This setting of the closing gap will depend in particular on the nature of the joints of the device, the expansion of the reinforcing fibers, as well as the disengagement of the closure chamber. Of course, the parameterization of this closure vacuum is perfectly within the reach of the skilled person.
De préférence, on instaure dans la chambre de fermeture un vide d'au moins 300 mbar, de préférence d'au moins 200 mbar.  Preferably, a vacuum of at least 300 mbar, preferably at least 200 mbar, is introduced into the closure chamber.
De préférence, on instaure une dépression dans la cavité d'au moins 800 mbar, de préférence d'au moins 950 mbar, avec le moyen de mise en dépression de la cavité.  Preferably, a depression in the cavity of at least 800 mbar, preferably at least 950 mbar, is instituted with the depression means of the cavity.
Selon un mode de réalisation du procédé de fabrication selon l'invention, l'étape c) est réalisée en instaurant une dépression dans la cavité avec le moyen de mise en dépression de la cavité d'au moins d'au moins 800 mbar et un vide de fermeture dans la chambre de fermeture d'au moins 300 mbar.  According to one embodiment of the manufacturing method according to the invention, step c) is carried out by introducing a depression in the cavity with the means of depression of the cavity of at least at least 800 mbar and a closing vacuum in the closing chamber of at least 300 mbar.
A la différence de la technique d'infusion, le procédé de fabrication selon l'invention ne nécessite pas de tissus ou de consommables qui sont des matériaux onéreux et à usage unique. Le coût de fabrication de pièces moulées avec le procédé selon l'invention est donc réduit de par l'affranchi issement de ces matériaux et des coûts de main-d'œuvre inhérents à leur manipulation minutieuse. Le procédé de fabrication selon l'invention peut être automatisé. Unlike the infusion technique, the manufacturing method according to the invention does not require fabrics or consumables which are expensive materials and disposable. The cost of manufacturing molded parts with the process according to the invention is therefore reduced by the franking of these materials and the labor costs inherent in their careful handling. The manufacturing method according to the invention can be automated.
Selon le procédé de fabrication selon l'invention, la résine peut être une résine thermodurcissable. Elle est avantageusement choisie dans le groupe constitué par :  According to the manufacturing method according to the invention, the resin may be a thermosetting resin. It is advantageously chosen from the group consisting of:
les résines de polyesters insaturés (éventuellement mélangées avec des charges telles que le carbonate de calcium, de manière à améliorer l'aspect de la pièce moulée et à réduire son coût de fabrication) ;  unsaturated polyester resins (optionally mixed with fillers such as calcium carbonate, so as to improve the appearance of the molded part and reduce its cost of manufacture);
les résines vinylesters. Avantageusement, ces résines vinylesters sont mises en œuvre avec des charges, des catalyseurs et des accélérateurs de prise ;  vinylester resins. Advantageously, these vinylester resins are used with fillers, catalysts and setting accelerators;
les résines époxydes. Les pièces polymérisées obtenues à partir de résines époxydes ont une excellente résistance à la fatigue ;  epoxy resins. Polymerized pieces obtained from epoxy resins have excellent fatigue resistance;
les résines phénoliques ;  phenolic resins;
les polyuréthanes et polyurées ;  polyurethanes and polyureas;
les polyimides ;  polyimides;
Selon un autre mode de réalisation du procédé de fabrication , la résine est une résine thermoplastique. Elle est avantageusement choisie dans le groupe constitué par les polyéther éther cétone, les polyamides, les polyétherimides, les polyéthylènes, les polypropènes, les poly(sulfure de phénylène).  According to another embodiment of the manufacturing method, the resin is a thermoplastic resin. It is advantageously chosen from the group consisting of polyether ether ketone, polyamides, polyetherimides, polyethylenes, polypropenes and polyphenylene sulfides.
De manière tout à fait préférée, la résine utilisée au cours du procédé de fabrication selon l'invention est une résine thermodurcissable.  Most preferably, the resin used during the manufacturing process according to the invention is a thermosetting resin.
Dans des modes de réalisation du procédé de fabrication, la résine peut en outre comprendre des charges et/ou des pigments. Dans le cadre de la présente invention, on entend par charge, toute substance inerte, minérale ou végétale qui, à ajoutée à la résine de base, permet de modifier ses propriétés mécaniques, électriques ou thermiques, d'améliorer l'aspect de surface, voire aussi de réduire le coût de revient de la pièce moulée.  In embodiments of the manufacturing method, the resin may further comprise fillers and / or pigments. In the context of the present invention, the term "filler" is understood to mean any inert, mineral or vegetable substance which, when added to the base resin, makes it possible to modify its mechanical, electrical or thermal properties, to improve the surface appearance, or even to reduce the cost of the molded part.
Le choix de la charge dépend des propriétés mécaniques souhaitées de la pièce moulée. Il peut s'agir de charges organiques telles que les charges cellulosiques, les farines de bois, les farines d'écorce de fruits et de noyaux, les fibres végétales, les amidons, ou bien de fibres minérales telles que les carbonates, les silices, les talcs, les argiles et alumino-silicates, ou encore d'oxydes (oxydes de zinc, de magnésium, de titane et d'antimoine, de béryllium), d'alumines, de céramiques, de poudres de verre, de billes de verre creuses, de microsphères de verre ou bien encore de noir de carbone. The choice of load depends on the desired mechanical properties of the molded part. It can be organic fillers such as cellulosic fillers, wood flours, fruit and stone bark flours, vegetable fibers, starches, or mineral fibers. such as carbonates, silicas, talcs, clays and alumino-silicates, or oxides (oxides of zinc, magnesium, titanium and antimony, beryllium), alumina, ceramics, glass powders, hollow glass beads, glass microspheres or even carbon black.
Les fibres de renfort sont avantageusement choisies parmi les fibres de verre qui sont obtenues à partir de sable (silice) et d'additifs (alumine, carbonate de chaux, magnésie, oxyde de bore). Il peut aussi s'agir de fibres de carbone ou d'aramide.  The reinforcing fibers are advantageously chosen from glass fibers which are obtained from sand (silica) and additives (alumina, carbonate of lime, magnesia, boron oxide). It can also be carbon fibers or aramid.
De manière préférée, on utilise comme fibres de renfort des fibres de verre. Elles peuvent être sous formes de mats, de préformes ou éventuellement de tissus.  Preferably, glass fibers are used as reinforcing fibers. They may be in the form of mats, preforms or possibly fabrics.
Selon l'invention, le taux volumique de renforcement peut atteindre jusqu'à environ 65%.  According to the invention, the volume ratio of reinforcement can reach up to about 65%.
Ainsi, selon ce mode de réalisation de l'invention et à la différence de la technique du RTM, le procédé de fabrication présente l'avantage de ne pas mettre en œuvre de moyens mécaniques onéreux tels qu'un autoclave ou une presse pour maintenir plaqué le contre-moule sur le moule.  Thus, according to this embodiment of the invention and unlike the RTM technique, the manufacturing process has the advantage of not implementing expensive mechanical means such as an autoclave or a press to maintain plated the counter-mold on the mold.
Selon un mode avantageux du procédé de fabrication, la mise sous vide de la chambre de fermeture et la mise en dépression de la cavité sont réalisées au moyen d'une même pompe à vide, les circuits de mise en dépression de la cavité et de mise sous vide de la chambre de fermeture étant respectivement équipés de moyens de mesure (par exemple manomètre) et de régulation de la pression et du débit (par exemple vanne). Cela présente l'avantage de pouvoir gérer séparément et de manière appropriée, en fonction de révolution du procédé de fabrication, le vide dit « vide de fermeture » et le vide résiduel régnant dans la cavité.  According to an advantageous mode of the manufacturing process, the vacuum of the closing chamber and the depression of the cavity are carried out by means of the same vacuum pump, the cavity depression and setting circuits. vacuum chamber of the closure chamber being respectively equipped with measuring means (eg manometer) and pressure and flow control (eg valve). This has the advantage of being able to separately and appropriately manage, according to the revolution of the manufacturing process, the so-called vacuum "closing vacuum" and the residual vacuum prevailing in the cavity.
Les pièces moulées selon le procédé de fabrication de l'invention présentent les caractéristiques avantageuses suivantes qui sont très similaires à celles obtenues avec la technique d'infusion. Elles peuvent être :  The molded parts according to the manufacturing method of the invention have the following advantageous characteristics which are very similar to those obtained with the infusion technique. They can be:
- de grande dimension, jusqu'à environ 10 m ;  - large, up to about 10 m;
de formes complexes ;  complex shapes;
de faibles épaisseurs, de quelques dixièmes de millimètres à plusieurs millimètres ;  low thicknesses, from a few tenths of a millimeter to several millimeters;
En outre, par rapport à la technique d'infusion, les pièces moulées obtenues selon le procédé de fabrication de la présente invention présentent l'avantage d'avoir deux faces externes lisses et exemptes de défauts de surface. In addition, compared to the infusion technique, the moldings obtained according to the manufacturing method of the present invention exhibit the advantage of having two smooth external faces and free of surface defects.
Le procédé de fabrication selon l'invention est tout particulièrement adapté pour la fabrication de carters, de coques de bateau, de cadres de vélo, d'éléments de carrosserie, de cuves, de divers articles sanitaires, ou encore plus généralement de toutes pièces industrielles aux formes très diverses et plus ou moins complexes.  The manufacturing method according to the invention is particularly suitable for the manufacture of crankcases, boat hulls, bicycle frames, bodywork elements, tanks, various sanitary articles, or more generally any industrial parts. with very different forms and more or less complex.
L'invention sera mieux comprise à l'aide de la description détaillée qui est exposée ci-dessous en référence au dessin annexé représentant, à titre d'exemple non limitatif, une forme de réalisation du dispositif de fabrication d'une pièce moulée en matériau composite selon l'invention.  The invention will be better understood using the detailed description which is described below with reference to the accompanying drawing showing, by way of non-limiting example, an embodiment of the device for manufacturing a molded piece of material composite according to the invention.
La figure 1 représente une vue schématique d'un dispositif de fabrication d'une pièce moulée en matériau composite selon l'invention, dans laquelle la partie du dispositif représentant le moule et le contre-moule est vue en coupe.  FIG. 1 represents a schematic view of a device for manufacturing a molded part made of composite material according to the invention, in which the portion of the device representing the mold and the counter-mold is seen in section.
La figure 2a est une vue du dessus et en coupe du moule selon un premier mode de réalisation de l'invention.  Figure 2a is a view from above and in section of the mold according to a first embodiment of the invention.
La figure 2b est une vue du dessus et en coupe du moule selon un deuxième mode de réalisation de l'invention.  Figure 2b is a view from above and in section of the mold according to a second embodiment of the invention.
Sur la figure 1 , la résine 3 qui est une résine thermodurcissable est stockée dans un pot de réserve 13. La résine thermodurcissable 3 est acheminée jusqu'au canal 9 d'introduction ménagé dans le contre-moule 6 par une tubulure 19.  In FIG. 1, the resin 3 which is a thermosetting resin is stored in a reserve pot 13. The thermosetting resin 3 is conveyed to the introduction channel 9 formed in the counter-mold 6 by a pipe 19.
Une cavité 5 a été ménagée dans le moule 4. Les fibres de renfort 2 sont disposées dans la cavité 5.  A cavity 5 has been formed in the mold 4. The reinforcing fibers 2 are arranged in the cavity 5.
Le moule 4 et le contre-moule 6 comportent des zones d'appui respectives qui entourent la cavité 5. Ces zones d'appui comportent deux joints d'étanchéité périphériques 1 1 ,12 qui délimitent une chambre de fermeture 22. Le joint d'étanchéité 12 a aussi pour fonction d'éviter que la résine thermodurcissable ne se répande en dehors de la cavité 5.  The mold 4 and the counter-mold 6 comprise respective bearing zones which surround the cavity 5. These bearing zones comprise two peripheral seals 1 1, 12 which delimit a closing chamber 22. The seal sealing 12 also has the function of preventing the thermosetting resin from spreading out of the cavity 5.
La chambre de fermeture 22 est reliée à la pompe à vide 7 au moyen de la tubulure 21 et du canal 8 ménagé dans le contre-moule 6.  The closing chamber 22 is connected to the vacuum pump 7 by means of the pipe 21 and the channel 8 formed in the counter mold 6.
La tubulure 21 est équipée d'un manomètre 16 mesurant le vide de fermeture et d'une vanne 18 permettant de réguler la pression et le débit.  The tubing 21 is equipped with a manometer 16 measuring the closing vacuum and a valve 18 for regulating the pressure and the flow.
Le contre-moule 6 est équ ipé d'un canal 1 0 d'extraction de la résine thermodurcissable 3. Une tubulure 20 relie le canal 10 d'extraction à un pot tampon 14 qui permet d'éviter de noyer la pompe à vide 7 avec de la résine thermodurcissable 3, lorsque la cavité 5 est mise en dépression et que la résine thermodurcissable 3 est introduite dans celle-ci. The counter-mold 6 is equipped with a channel 1 0 for extracting the thermosetting resin 3. A tubing 20 connects the extraction channel 10 to a buffer pot 14 which makes it possible to avoid flooding the vacuum pump 7 with thermosetting resin 3, when the cavity 5 is depressurized and the thermosetting resin 3 is introduced into it.
La tubulure 20 est équipée d'un manomètre 15 mesurant la dépression au sein de la cavité 5 et d'une vanne 17 assurant la régulation de la pression et du débit. La tubulure 20 relie la pompe à vide 7 au canal 10.  The tubing 20 is equipped with a manometer 15 measuring the depression within the cavity 5 and a valve 17 ensuring the regulation of pressure and flow. The tubing 20 connects the vacuum pump 7 to the channel 10.
Ainsi, en manipulant de manière appropriée les vannes 18,17 au cours de la fabrication de la pièce moulée en matériau composite, le vide peut être établi de manière contrôlée dans la cavité 5 et dans la chambre de fermeture 22.  Thus, by suitably manipulating the valves 18, 17 during the manufacture of the molded composite material, the vacuum can be established in a controlled manner in the cavity 5 and in the closure chamber 22.
Les figures 2a et 2b montrent deux formes de réalisation différentes de la zone 23 dont est pourvue la cavité 5. Les fibres de renfort 2 sont disposées dans la cavité 5 à l'exception de la zone 23. La résine thermodurcissable 3 est introduite dans la zone 23 avec le canal 9 d'introduction. Ces deux modes de réalisation permettent une imprégnation homogène de l'ensemble des fibres de renfort 2 du fait de la maîtrise du flux de la résine thermodurcissable 3 qui migre sur toute la largeur de la cavité 5 (mode de réalisation représenté à la figure 2a) ou sur tout le pourtour de la cavité 5 (mode de réalisation représenté à la figure 2b). Il n'y a pas de chemin préférentiel de la résine thermodurcissable 3.  FIGS. 2a and 2b show two different embodiments of the zone 23 of which the cavity 5 is provided. The reinforcing fibers 2 are disposed in the cavity 5 with the exception of the zone 23. The thermosetting resin 3 is introduced into the zone 23 with the introduction channel 9. These two embodiments allow a homogeneous impregnation of all the reinforcing fibers 2 due to the control of the flow of the thermosetting resin 3 which migrates over the entire width of the cavity 5 (embodiment shown in Figure 2a) or all around the cavity 5 (embodiment shown in Figure 2b). There is no preferential path of the thermosetting resin 3.

Claims

REVENDICATIONS
1 . Dispositif (1 ) de fabrication d'une pièce moulée en un matériau composite comprenant un mélange de fibres de renfort (2) et d'une résine (3), ledit dispositif (1 ) comprenant : 1. Device (1) for manufacturing a molded part made of a composite material comprising a mixture of reinforcing fibers (2) and a resin (3), said device (1) comprising:
un moule (4) dans lequel est ménagée u ne cavité (5) configurée pour la disposition des fibres de renfort (2) ;  a mold (4) in which is formed a cavity (5) configured for the arrangement of the reinforcing fibers (2);
un contre-moule (6) qui, destiné à ven ir en appu i sur le moule (4) pour fermer la cavité (5), est équipé d'au moins un canal (9) d'introduction de la résine (3) dans la cavité (5), le canal (9) d'introduction étant adapté pour être relié à au moins une source d'approvisionnement (13) en résine (3) ; des moyens de positionnement et de fixation du contre- moule (6) sur le moule (4) ;  a counter-mold (6) which, intended to rest on the mold (4) to close the cavity (5), is equipped with at least one channel (9) for introducing the resin (3) in the cavity (5), the insertion channel (9) being adapted to be connected to at least one resin supply source (13) (3); means for positioning and fixing the counter-mold (6) on the mold (4);
- au moins u n moyen (7) de m ise en dépression de la cavité (5) pour assurer l'introduction de la résine (3) dans celle-ci et au moins un canal (10) d'extraction de la résine (3) en excès hors de la cavité (5),  at least one means (7) for depressing the cavity (5) to ensure the introduction of the resin (3) into the cavity and at least one channel (10) for extracting the resin (3); ) in excess out of the cavity (5),
caractérisé en ce que le moule (4) et le contre-moule (6) comportent des zones d'appui respectives entourant la cavité (5), ces zones d'appui comprenant deux joints d'étanchéité périphériques (1 1 ,12) décalés l'un par rapport à l'autre, de l'intérieur vers l'extérieur, délimitant une chambre de fermeture (22) qui est reliée à une source de vide (7), ladite source de vide (7) mettant en dépression la chambre de fermeture (22) pour assurer le plaquage du contre-moule (6) sur le moule (4). characterized in that the mold (4) and the counter-mold (6) have respective bearing areas surrounding the cavity (5), these bearing areas comprising two peripheral seals (1 1, 12) offset relative to each other, from the inside to the outside, delimiting a closing chamber (22) which is connected to a vacuum source (7), said vacuum source (7) depressing the closing chamber (22) for plating against the mold (6) on the mold (4).
2. Dispositif (1 ) selon la revendication 1 , caractérisé en ce que le moyen de mise en dépression de la cavité (5) comprend une pompe à vide (7), un canal (10) ménagé dans le contre-moule (6) ou dans le moule (4) servant à la mise en dépression de la cavité (5) et à l'extraction de la résine (3) en excès hors de la cavité (5), et un circuit de mise en dépression (20) présentant la forme d'une tubulure qui relie la pompe à vide (7) au canal (10). 2. Device (1) according to claim 1, characterized in that the means for depression of the cavity (5) comprises a vacuum pump (7), a channel (10) formed in the counter-mold (6) or in the mold (4) for the depression of the cavity (5) and the extraction of excess resin (3) out of the cavity (5), and a vacuum circuit (20) having the shape of a pipe which connects the vacuum pump (7) to the channel (10).
3. Dispositif (1 ) selon la revendication 2, caractérisé en ce que la tubulure (20) reliant le canal (10) ménagé dans le contre-moule (6) ou dans le moule (4) à la pompe à vide (7) est équipée d'un pot tampon (14) destiné à recueillir la résine (3) extraite de la cavité (5). 3. Device (1) according to claim 2, characterized in that the tubing (20) connecting the channel (10) formed in the counter-mold (6) or in the mold (4) at the vacuum pump (7) is equipped with a buffer pot (14) for collecting the resin (3) extracted from the cavity (5).
4. Dispositif (1 ) selon l 'une q uelconque des revend ications précédentes, caractérisé en ce que le canal (9) d'introduction et le canal (10) d'extraction présentent une forme tronconique. 4. Device (1) according to one or more of the preceding revendications ications, characterized in that the channel (9) of introduction and the channel (10) of extraction have a frustoconical shape.
5. Dispositif (1 ) selon l'une quelconque des revendications précédentes, caractérisé en ce que la chambre de fermeture (22) est reliée à la source de vide au moyen d'un circuit de mise sous vide (21 ) présentant la forme d'une tubulure et d'un canal (8) ménagé dans le contre-moule (6) ou dans le moule (4), 5. Device (1) according to any one of the preceding claims, characterized in that the closing chamber (22) is connected to the vacuum source by means of a vacuum circuit (21) having the form of a tubing and a channel (8) formed in the counter-mold (6) or in the mold (4),
6. Dispositif (1 ) selon la revendication 5, caractérisé en ce que le circuit de mise en dépression (20) de la cavité (5) et le circuit de la mise sous vide (21 ) de la chambre de fermeture (22) sont d isposés en parallèle et convergent en amont de la même pompe à vide (7). 6. Device (1) according to claim 5, characterized in that the vacuum circuit (20) of the cavity (5) and the circuit of the evacuation (21) of the closure chamber (22) are are connected in parallel and converge upstream of the same vacuum pump (7).
7. Dispositif (1 ) selon la revendication 6, caractérisé en ce que le circuit de mise en dépression (20) de la cavité (5) et le circuit de la mise sous vide (21 ) de la chambre de fermeture (22) sont équipés de moyens de mesure (15,16) et de moyens de régulation (17,18) de la pression et du débit. 7. Device (1) according to claim 6, characterized in that the vacuum circuit (20) of the cavity (5) and the circuit of the evacuation (21) of the closure chamber (22) are equipped with measuring means (15, 16) and regulation means (17, 18) for the pressure and the flow rate.
8. Dispositif (1 ) selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend en outre au moins un moyen de centrage du contre-moule (6) sur le moule (4). 8. Device (1) according to any one of claims 1 to 7, characterized in that it further comprises at least one centering means against the mold (6) on the mold (4).
9. Procédé de fabrication d'une pièce moulée en un matériau composite comprenant un mélange de fibres de renfort (2) et d'une résine (3) mettant en œuvre le dispositif (1 ) selon l'une quelconque des revendications 1 à 8 qui comprend les étapes suivantes : 9. A method of manufacturing a molded part of a composite material comprising a mixture of reinforcing fibers (2) and a resin (3) implementing the device (1) according to any one of claims 1 to 8 which includes the following steps:
a) on dispose des fibres de renfort (2) dans la cavité (5) du dispositif (1 ) ;  a) the reinforcement fibers (2) are arranged in the cavity (5) of the device (1);
b) on dépose le contre-moule (6) sur le moule (4) ; c) on instaure une dépression dans la cavité (5) avec le moyen de mise en dépression (7) de la cavité (5) et on instaure un vide de fermeture dans la chambre de fermeture (22) ; b) depositing the counter-mold (6) on the mold (4); c) a depression is introduced in the cavity (5) with the means of depression (7) of the cavity (5) and a closing vacuum is established in the closing chamber (22);
d) on introduit de la résine dans la cavité (5) tout en maintenant la dépression dans la cavité (5) et le vide de fermeture dans la chambre de fermeture (22) ;  d) introducing resin into the cavity (5) while maintaining the depression in the cavity (5) and the closing vacuum in the closure chamber (22);
e) on arrête la mise en dépression de la cavité (5) lorsqu'un excès de résine (3) sort de la cavité (5) par le canal (10) ;  e) the depression of the cavity (5) is stopped when an excess of resin (3) leaves the cavity (5) via the channel (10);
f) on thermo-durcit la résine (3) ;  f) heat-curing the resin (3);
g) on désolidarise le contre-moule (6) du moule (4) ;  g) the counter-mold (6) is detached from the mold (4);
h) on démoule la pièce moulée ;  h) the molded part is demolded;
i) optionnellement, on découpe la pièce moulée obtenue à l'étape h).  i) optionally, the molded part obtained in step h) is cut.
10. Procédé de fabrication selon la revendication 9, caractérisé en ce que l'étape c) est réalisée en instaurant une dépression dans la cavité (5) avec le moyen de mise en dépression (7) de la cavité (5) d'au moins 800 mbar et un vide de fermeture dans la chambre de fermeture (22) d'au moins 300 mbar. 10. The manufacturing method according to claim 9, characterized in that step c) is carried out by introducing a depression in the cavity (5) with the means of depression (7) of the cavity (5) of minus 800 mbar and a closing gap in the closing chamber (22) of at least 300 mbar.
EP13706588.4A 2012-01-31 2013-01-30 Device and method for producing a moulded part from a composite material Withdrawn EP2809502A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1250874A FR2986179B1 (en) 2012-01-31 2012-01-31 DEVICE AND METHOD FOR MANUFACTURING A MOLDED PIECE OF A COMPOSITE MATERIAL
PCT/FR2013/050183 WO2013114037A2 (en) 2012-01-31 2013-01-30 Device and method for producing a moulded part from a composite material

Publications (1)

Publication Number Publication Date
EP2809502A2 true EP2809502A2 (en) 2014-12-10

Family

ID=47754779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13706588.4A Withdrawn EP2809502A2 (en) 2012-01-31 2013-01-30 Device and method for producing a moulded part from a composite material

Country Status (7)

Country Link
US (1) US20150014898A1 (en)
EP (1) EP2809502A2 (en)
CN (1) CN104159725A (en)
CA (1) CA2863155A1 (en)
FR (1) FR2986179B1 (en)
RU (1) RU2014131007A (en)
WO (1) WO2013114037A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107225775A (en) * 2016-03-25 2017-10-03 上海艾郎风电科技发展（集团）有限公司 Hand pastes technique and the device for it
EP3489001A1 (en) * 2017-11-22 2019-05-29 Afros S.P.A. Apparatus for fine and controlled adjustment of an injection molding process and related industrial process
CN108515712A (en) * 2018-06-01 2018-09-11 常州市新创智能科技有限公司 A kind of composite material shaping mould
CN113386374B (en) * 2021-05-14 2022-08-23 中国航发北京航空材料研究院 Mold for improving internal quality of liquid molding composite material and control method

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2233157A1 (en) * 1973-06-15 1975-01-10 Desplat Raymond Reinforced mouldings made by flooding a closed mould - using vacuum filling to avoid void formations
SE465414B (en) * 1990-06-08 1991-09-09 Dag Thulin PROCEDURES FOR VACUUM CASTING OF LARGE PLASTIC GOODS
JPH07256767A (en) * 1994-03-22 1995-10-09 Nippo Sangyo Kk Molding tool and molding method for thermosetting resin
FR2828131A1 (en) * 2001-08-06 2003-02-07 Pole De Plasturgie De L Est Manufacture of large components from resin-impregnated composition materials by Resin Transfer Molding (RTM) and frontal injection
ES2596505T3 (en) * 2001-08-07 2017-01-10 Toray Industries, Inc. Procedure for manufacturing a large PRF element
US20030214081A1 (en) * 2002-05-15 2003-11-20 Visteon Global Technologies, Inc. Method and apparatus for molding structural composites
EP1378338A1 (en) * 2002-07-03 2004-01-07 Ke-Burgmann A/S A method and a moulding device for the manufacture of composite products in a closed mould process wherein the mould comprises an inner liner and an inner liner for said method and device
WO2005077632A1 (en) * 2004-02-17 2005-08-25 Toray Industries, Inc. Rtm molding method and device
DE102005053691A1 (en) * 2005-11-10 2007-05-16 Airbus Gmbh Tool for resin transfer molding process
GB0523581D0 (en) * 2005-11-19 2005-12-28 Harper Alan R Production of composite mouldings
CN101903161A (en) * 2007-12-20 2010-12-01 维斯塔斯风力***集团公司 A method of manufacturing a composite part from resin-preimpregnated fibres
DK2106900T3 (en) * 2008-04-03 2012-07-09 Siemens Ag Form and Method of Vacuum Supported Resino Transfer Molding
FR2934808B1 (en) * 2008-08-08 2013-03-08 Airbus France METHOD FOR MANUFACTURING A COMPOSITE MATERIAL PART AND ASSOCIATED DEVICE
CN101728646B (en) * 2010-01-06 2012-11-07 东华大学 Molding method for three-dimensional woven fabric conformal bearer microstrip antenna without covering by resin

Also Published As

Publication number Publication date
WO2013114037A2 (en) 2013-08-08
FR2986179B1 (en) 2014-10-10
RU2014131007A (en) 2016-03-27
FR2986179A1 (en) 2013-08-02
CA2863155A1 (en) 2013-08-08
US20150014898A1 (en) 2015-01-15
CN104159725A (en) 2014-11-19
WO2013114037A3 (en) 2013-12-12

Similar Documents

Publication Publication Date Title
CA2930813C (en) Method for impregnation of a fibrous preform and device for implementation of the said method
EP2004390B1 (en) Method of producing stiffened panels made of a composite
EP1996390B1 (en) Method for producing structures of complex shapes of composite materials
US20090008836A1 (en) Method for producing fiber-reinforced plastic components
WO2006064167A1 (en) Densification of fibrous structures by resin transfer moulding for making thick parts of composite material
EP0862978A1 (en) Method of manufacturing hollow articles from a composite material
EP2809502A2 (en) Device and method for producing a moulded part from a composite material
EP0865892B1 (en) Process for manufacturing precision hollow articles made of composite material
CA2969375A1 (en) Moulding device for the manufacture of composite components from liquid polymer resin by high-pressure injection
EP2569143A1 (en) Process for manufacturing a part made of a composite having a hollow core
EP3024639B1 (en) Method for injection molding a part made of a composite material having advance pre-consolidation of the fibrous preform
FR2933892A1 (en) MANUFACTURE OF FIBER-REINFORCED COMPONENTS WITH MOLD CORES
JP2003025347A (en) Vacuum rtm molding method
EP1136237A2 (en) Fibre reinforced plastic article and method of manufacture
JP4752147B2 (en) RTM molding method
FR3081761A1 (en) PROCESS FOR MANUFACTURING A COMPOSITE MATERIAL
CA2969071C (en) Moulding device for the manufacture of composite components using liquid polymer resin
WO2023041559A1 (en) Method for producing a composite material part
FR2922150A1 (en) Boat or tank's composite material hull manufacturing method, involves applying gelcoat on mold, applying draining reinforcing fiber on gelcoat, closing translucent counter-mold on mold, and injecting resin between counter-mold and mold
FR2914219A1 (en) Hollow monolithic composite piece e.g. kayak hull, manufacturing method, involves emptying space between bladder and inner wall of mold to place bladder against frames, and infusing resin in frames between mold wall and bladder wall
FR2999469A1 (en) Manufacturing composite material parts with open cell core, comprises placing mold in core provided on face of sealing layer, preforming sealing layer; bonding layer with core, and introducing structural resin between mold and layer
FR2763879A1 (en) Production of mould with internal detachable skin protecting against deterioration in mass production
FR2707548A1 (en) Method of manufacturing, by injection moulding, moulded parts made of synthetic material and mould for implementing this method
FR2683731A1 (en) Method for manufacturing a complex moulded structure and, in particular, a ski

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140627

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20161116

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170527