Injection molding tooling and processes using such tooling

Abstract

Injection molding tooling and process using such tooling An injection molding tooling (100) comprises: - a mold (110) having an internal surface (100a), - a membrane (130) opposite the internal surface (110a) of the mold (110) delimiting with the internal surface of the mold an impregnation chamber (160), - a mold closing element (120) delimiting with an external face (130b) of the membrane (130) a compaction chamber (170), - one or more injection ports (111) opening onto the internal surface (110a) of the mold (110), each injection port (111) forming an edge (1110) on said internal surface of the mold opposite the membrane (130).The tooling further includes a deflector (140) interposed between each injection orifice (111) and the membrane (130), and in that the deflector (140) has an internal cavity (141) in fluidic communication with the injection orifice and opening in a direction (D140) parallel to the membrane (130). Figure for the abbreviation: Fig. 3.

Description

Title of the invention: Injection molding tooling and a process using such tooling. Technical field

[0001] The present invention relates to the field of injection molding. It relates more particularly to the injection molding process using a flexible membrane. Previous technique

[0002] An injection molding process for manufacturing composite materials is known as "Polyflex". This process uses tooling such as the injection molding tooling 200 shown in [Fig. 1]. Tooling 200 comprises a mold 210 having an internal surface 210a on a portion of which a fibrous texture 10 is positioned. The fibrous texture 10 is covered by a flexible, impermeable membrane 230. The mold assembly 210 is closed by a cover 220, with the membrane 230 interposed between the cover 220 and the mold 210. An impregnation composition 20, such as a matrix precursor resin, is then injected into the volume delimited between the membrane 230 and the internal surface 210a of the mold 210, in which the fibrous texture 10 is present. The impregnation composition 20 is injected into this volume through an injection port (not shown in [Fig. 1]) connected to an injection orifice 211 present in the mold 210.

[0003] Once the impregnation composition has been injected into the volume defined between the membrane 230 and the internal surface 210a of the mold 210, an isostatic pressure Pi is exerted on the membrane 230 by a compaction fluid 30 in order to force the impregnation composition 20 to penetrate the fibrous texture 10 and mold the latter into a predetermined shape as illustrated in [Fig. 2]. The mold 210 further includes a discharge orifice 212 intended to be connected to a discharge port (not shown in [Fig. 2]) to allow the evacuation of air and excess impregnation composition. An example of injection molding tooling is described in particular in document FR3063674.

[0004] The injection port 211 and the discharge port 212 of the mold 210 are positioned opposite the membrane 230 and form sharp edges 2110 and 2120 on the internal surface 210a of the mold. When pressure is applied to the membrane 230 to press it against the fibrous texture 10 and the internal surface 210a of the mold 210, the membrane 230 comes into contact with the ports 211 and 212. There is then a risk of the membrane 230 being cut by the sharp edges 2110 and 2120 of the ports 211 and 212, respectively. Furthermore, the discharge port 212 is used to evacuate air and excess fluid. The impregnation composition can be obstructed by the membrane 230, which complicates, or even prevents, good control of the impregnation of the fibrous texture. Description of the invention

[0005] It is therefore desirable to be able to propose a solution for the injection molding of fibrous textures which does not present the aforementioned disadvantages.

[0006] To this end, the present invention proposes an injection molding tool comprising: - a mold having an internal surface on a part of which the fibrous texture is intended to be placed, - a membrane facing the internal surface of the mold, the space delimited between the internal surface of the mold and an internal face of the membrane corresponding to an impregnation chamber, - at least one mold closure element opposite an external face of the membrane, the space delimited between said at least one mold closure element and the external face of the membrane corresponding to a compaction chamber, - one or more injection ports opening onto the internal surface of the mold, each injection port forming an edge on said internal surface of the mold opposite the membrane, characterized in that it further comprises a deflector interposed between each injection port and the membrane and in that the deflector comprises an internal cavity in fluidic communication with the injection port and opening in at least one direction parallel to the membrane or perpendicular to a normal to the section of the injection port.

[0007] The invention thus provides a tool in which the risk of damage to the membrane by contact with the edge of each orifice is avoided. Unlike an orifice that opens in a direction substantially perpendicular to the membrane and, consequently, opposite it, the deflector(s) of the tool of the invention do not open opposite the membrane but in a direction parallel to the membrane. Consequently, the membrane cannot be pressed directly against the outlet orifice of the deflector, unlike the injection orifice when it is not equipped with a deflector according to the invention.

[0008] According to another particular feature of the tooling of the invention, it further comprises one or more discharge ports located on the internal surface of the mold, each discharge port forming an edge on said internal surface of the mold opposite the membrane, the tooling further comprising a deflector interposed between each discharge port and the membrane, and in that the deflector has an internal cavity in fluidic communication with the discharge port and opening in at least one direction parallel to the membrane or perpendicular to a normal to the cross-section of the discharge orifice.

[0009] The risk of damage to the membrane by contact with the edge of each discharge orifice is avoided. Unlike an orifice that opens in a direction substantially perpendicular to the membrane and, consequently, opposite it, the deflector(s) of the tooling of the invention do not open opposite the membrane but in a direction parallel to it. Consequently, the membrane cannot be pressed directly against the outlet orifice of the deflector, unlike the injection orifice when it is not equipped with a deflector according to the invention. Furthermore, with a deflector interposed between each discharge orifice and the membrane, the membrane is prevented from obstructing the discharge orifice(s) when pressure is applied to it via the compaction chamber.

[0010] According to another particular feature of the tooling of the invention, each deflector comprises a shell having a rounded shape. This improves the protection of the membrane by avoiding the presence of sharp angles or edges on the surface of the deflector that could come into contact with the membrane.

[0011] According to another particular feature of the tooling of the invention, each deflector is removably mounted on the mold. The precision machining of very small dimensions required to produce the deflector is thus greatly facilitated compared to machining the deflector directly from the mold itself. Furthermore, thanks to its removability, the deflector can be easily cleaned after each injection.

[0012] The invention also relates to a method of injection molding of a fibrous texture using an impregnation composition, the method comprising the following steps: - positioning of a fibrous texture on a molding surface present on an internal surface of a mold of an injection molding tool, - placement of a membrane around the mold so as to delimit an impregnation chamber between the internal surface of the mold and an internal face of the membrane, the fibrous texture being present in said impregnation chamber, - closure of the mold by at least one mold closure element, the space delimited between said at least one mold closure element and an external face of the membrane forming a compaction chamber, - injection of an impregnation composition through at least one or more injection orifices opening onto the internal surface of the mold, each injection orifice forming an edge on the internal surface of the mold opposite the membrane, - introduction of a compaction fluid into the compaction chamber so as to apply pressure via the membrane to the fibrous texture, characterized in that a deflector is interposed between each injection orifice and the membrane and in that the deflector has an internal cavity in fluidic communication with the injection orifice and opening in at least one direction parallel to the membrane or perpendicular to a normal to the section of the injection orifice.

[0013] The presence of the deflector(s) protects the membrane from any contact with the edge of the injection orifice(s). Thus, even when exerting significant pressure on the outer face of the membrane during the introduction of the compaction fluid, there is no risk of damage to it, unlike prior art tooling where the orifices opening onto the internal surface of the mold are opposite the membrane.

[0014] According to a particular feature of the process of the invention, the tooling further comprises one or more discharge ports present on the internal surface of the mold, each discharge port forming an edge on said internal surface of the mold opposite the membrane, the tooling further comprising a deflector interposed between each discharge port and the membrane and in that the deflector has an internal cavity in fluidic communication with the discharge port and opening in at least one direction parallel to the membrane or perpendicular to a normal to the section of the discharge port.

[0015] The presence of the deflector(s) protects the membrane from any contact with the edge of the discharge orifice(s). Thus, even when significant pressure is applied to the outer face of the membrane during the introduction of the compaction fluid, there is no risk of damage to it, unlike prior art tooling where the orifices opening onto the inner surface of the mold are directly opposite the membrane. Furthermore, with a deflector interposed between each discharge orifice and the membrane, the membrane is prevented from obstructing the discharge orifice(s) when pressure is applied to it via the compaction chamber.

[0016] According to another particular feature of the method of the invention, each deflector comprises a shell having a rounded shape. This improves the protection of the membrane by avoiding the presence of sharp angles or edges on the surface of the deflector that could come into contact with the membrane.

[0017] According to another particular feature of the process of the invention, each deflector is removably mounted on the mold. The precision machining of very small dimensions required to produce the deflector is thus greatly facilitated compared to machining a deflector directly from the mold itself. Furthermore, thanks to its removability, the deflector can be easily cleaned after each injection. Brief description of the drawings

[0018] [Fig. 1] Fig. 1 is a schematic cross-sectional view of a prior art impregnation tooling showing the injection of an impregnation composition,

[0019] [Fig.2] Fig.2 is a schematic cross-sectional view of the tooling of Fig.1 during the application of compaction pressure on a membrane of the tooling,

[0020] [Fig.3] Fig.3 is a schematic cross-sectional view of an injection molding tool according to an embodiment of the invention during the injection of an impregnation composition into an impregnation chamber of the tool,

[0021] [Fig.4] Fig.4 is a schematic detail view of Fig.3 showing the injection of an impregnation composition into an impregnation chamber of the tool,

[0022] [Fig.5] Fig.5 is a schematic perspective view of a deflector of the tooling of Figures 3 and 4,

[0023] [Fig.6] Fig.6 is another schematic perspective view of a deflector of the tooling of Figures 3 and 4,

[0024] [Fig.7] The [Fig.7] is a schematic cross-sectional view of the injection molding tooling of the [Fig.3] when an isostatic pressure is exerted on the tooling membrane,

[0025] [Fig. 8] [Fig. 8] is a schematic detail view of [Fig. 7] showing the application of isostatic pressure to the tooling diaphragm. Description of embodiments

[0026] The invention applies generally to the injection molding of fibrous textures intended to form the fibrous reinforcement of a composite material part. The shapes obtained after molding can be varied. They are determined by the geometry of the molding surface of the mold used. The fibrous texture can be produced using one of the following techniques: - three-dimensional (3D) weaving or multi-layered weaving, - two-dimensional (2D) fabric - braid, - knitting, - felt, - unidirectional (UD) ribbon of wires or cables or multidirectional (nD) ribbon obtained by superimposing several UD ribbons in different directions.

[0027] The fibrous texture can also be achieved by a combination of several of the textures mentioned above.

[0028] A fibrous texture formed of several superimposed layers of UD or 2D fabric, braid, knit, felt, sheets, cables or other materials can also be used, which layers are linked together for example by sewing, by implantation of threads or rigid elements or by needle punching.

[0029] Where the fibrous texture is achieved in whole or in part by three-dimensional weaving, or multilayer weaving, the weave may be of the interlock type, but other three-dimensional or multilayer weaves may be used, such as multi-plain or multi-satin weaves. Reference may be made to document WO 2006 / 136755.

[0030] Figure 3 schematically illustrates an injection molding tool 100 according to an embodiment of the invention. In the example described here, the tool 100 is intended for manufacturing a part of revolution made of composite material, such as a gas turbine housing. The tool 100 therefore has a shape of revolution about an axis XX. The invention remains within the scope of the invention if the injection molding tool has a shape other than a shape of revolution, such as a substantially flat shape, as for example in the manufacture of gas turbine blades made of composite material.

[0031] The tooling 100 comprises a mold 110, here consisting of a mandrel or drum having an internal surface 110a on a portion of which a fibrous texture 40 is positioned. The portion of the internal surface 110a of the mold 110 on which the fibrous texture is placed corresponds to the molding surface of the mold and has a geometry corresponding to that of the part to be manufactured.

[0032] Still in the example described here, the fibrous texture 40 is a textile strip obtained by 3D weaving which has been wound several times around the mold 110.

[0033] The tooling 100 further comprises a waterproof and deformable membrane 130 having a shape of revolution corresponding to the shape of the molding surface. The membrane 130 is pre-formed but must have sufficient flexibility to be placed in the injection molding tooling. The membrane 130 can be made, for example, of silicone. The space defined between the inner surface 110a of the mold 110 and an inner face 130a of the membrane 130 corresponds to an impregnation chamber 160 in which the fibrous texture 40 is present.

[0034] The tooling 100 further includes a mold closing element formed here by a ferrule 120. Optionally, sectors may be present between the ferrule 120 and the membrane 130, notably to reduce the volume to be filled in the compaction chamber. The space delimited between the ferrule 120 and an external face 130b of the membrane corresponds to a compaction chamber 170. The membrane 130 is maintained in airtight contact at a first end 131 between a first free end 113 of the mold 110 and the ferrule 120 and at a second end 132 between a second free end 114 of the mold 110 and the ferrule 120. More precisely, when a compaction fluid is introduced into the chamber of compaction as described in detail below, the membrane 130 deforms under the effect of the pressure exerted on it while remaining fixed at its ends between the mold and the shell, the membrane thus ensuring a seal between the impregnation chamber and the compaction chamber.

[0035] The mold includes an injection port 111 which opens onto the internal surface 110a of the mold 110 and an evacuation port 114 which also opens onto the internal surface 110a of the mold. The injection port 111 forms a sharp edge 1110 on the inner surface 110a of the mold 110. Similarly, the discharge port 112 forms a sharp edge 1120 on the inner surface 110a of the mold 110. As explained below, the injection port 111 is used to inject an impregnation composition into the impregnation chamber 160. The discharge port 112 facilitates the injection of the impregnation composition and its diffusion into the porosity of the fibrous texture by expelling air and any excess impregnation composition present in the impregnation chamber 160.

[0036] The invention remains within the scope of the invention when the mold comprises only one or more injection ports (i.e., no discharge port) or when the mold comprises several injection ports and several discharge ports. The injection port(s) and / or the discharge port(s) may be located at different points in the mold.

[0037] In the example described here, the ferrule 120 includes an injection port 121 opening into the compaction chamber 170. The injection port 121 is used to inject a compaction fluid into the compaction chamber 170 as described in detail below. The number and location(s) of the injection port(s) in the ferrule may vary. The ferrule 120 may further include exhaust ports (not shown in [Fig. 3]) to facilitate the introduction of the compaction fluid into the compaction chamber 170 by expelling the air present in said chamber.

[0038] According to the invention, a deflector is present in front of each orifice opening onto the internal surface of the mold, the deflector being interposed between the orifice and the membrane. In the example described here, the injection orifice 111 is covered by a first deflector 140 while the discharge orifice 112 is covered by a second deflector 150.

[0039] As illustrated in Figures 4 and 5, the deflector 140 comprises a shell 142 having a first edge 144 intended to be in contact with the internal surface 110a of the mold 110 and a second edge 143 through which the deflector opens into the impregnation chamber 160. The shell 142 surrounds the injection orifice 111 and, consequently, its sharp edge 1110, thus preventing contact between the membrane 130 and the sharp edge 1110 of the injection orifice 111 when pressure is applied. isostatically compacted by a fluid on the membrane as described below. The deflector 140 has an internal cavity 141 in fluidic communication with the injection orifice 111. The internal cavity 141 opens at an outlet orifice 145 surrounded by an edge 143 of the deflector 140. Unlike the injection orifice 111, which opens in a direction Dm substantially perpendicular to the membrane 130 and, consequently, opposite it, the deflector 140 does not open opposite the membrane 130 but in a direction Duo parallel to the membrane 130. Consequently, the membrane 130 cannot be pressed directly against the outlet orifice 145 of the deflector, unlike the injection orifice 111 when it is not equipped with a deflector according to the invention. By "direction parallel to the membrane", we mean here a direction tangential to the part of the inner face 130a of the membrane present at the injection orifice.

[0040] The invention remains within the scope of the invention when the deflector opens in a direction perpendicular to a normal to the cross-section of the injection orifice in question, which also prevents the deflector from opening directly opposite the membrane. The invention also remains within the scope of the invention when the internal cavity of the deflector opens at several outlet orifices in directions parallel to the membrane, in directions perpendicular to a normal to the cross-section of the injection orifice in question, or in one or more directions parallel to the membrane and in one or more directions perpendicular to a normal to the cross-section of the injection orifice in question.

[0041] In the example described here, and according to a particular feature, the shell 142 of the deflector 140 has a rounded shape. This improves the protection of the membrane 130 by avoiding the presence of sharp angles or edges on the surface of the deflector that could come into contact with the membrane.

[0042] Furthermore, in the example described here and according to another particular feature, the outlet orifice 145 of the deflector 140 is in contact or almost in contact with an edge 41 of the fibrous texture 40. In this case, any access of the membrane to the outlet orifice 145 of the deflector 140 is masked by the edge 41 of the fibrous texture.

[0043] According to another particular feature, the deflector 140 is removably mounted on the mold 110. The precision machining of very small dimensions required to produce the deflector is thus greatly facilitated compared to machining the deflector directly from the mold itself. Furthermore, thanks to its removability, the deflector can be easily cleaned after each injection.

[0044] The second deflector 150 covering the discharge opening 112 has the same characteristics as those already described for the first deflector 140, namely: - a shell that prevents contact between the membrane 130 and the sharp edge 1120 of the discharge orifice 112, - an internal cavity in fluidic communication with the discharge orifice 112 which opens at an outlet orifice surrounded by an edge of the deflector so that the deflector 150 does not open opposite the membrane 130 but in a direction parallel to it, - the deflector 150 shell may have a rounded shape, - the outlet orifice of deflector 150 may be in contact or almost in contact with an edge of the fibrous texture, - the deflector 150 can be removably mounted on the mold 110.

[0045] By "direction parallel to the membrane", we mean here a direction tangential to the part of the inner face 130a of the membrane present at the level of the discharge orifice.

[0046] The invention remains within the scope of the invention when the deflector opens in a direction perpendicular to a normal to the cross-section of the discharge orifice in question, which also prevents the deflector from opening directly opposite the membrane. The invention also remains within the scope of the invention when the internal cavity of the deflector opens at several outlets in directions parallel to the membrane, in directions perpendicular to a normal to the cross-section of the discharge orifice in question, or in one or more directions parallel to the membrane and in one or more directions perpendicular to a normal to the cross-section of the discharge orifice in question.

[0047] The deflector(s) according to the invention may have geometries different from that of the deflector 140 described above. Generally, a deflector according to the invention corresponds to a part that covers an orifice and, consequently, its edge, opening onto the internal surface of the mold and which itself opens into the impregnation chamber in a direction substantially parallel to the membrane.

[0048] An injection molding process for a fibrous texture is now described according to an embodiment of the invention. The process begins by winding the fibrous texture 40 onto the portion of the internal surface 110a of the mold 110 corresponding to the molding surface of the injection molding tool 100. The impermeable and deformable membrane 130 is then placed around the mold 110 opposite the fibrous texture 40, the space defined between the internal surface 110a of the mold 110 and an internal face 130a of the membrane 130 defining the impregnation chamber 160.

[0049] The mold 110 is then closed by the ferrule 120, which is fixed to the mold 110. Fixing the ferrule 120 to the free ends 113 and 114 of the mold 110 allows the ends 131 and 132 of the membrane 130 to remain in contact, respectively. sealed with both the ferrule 120 and the mold 110. The space delimited between the ferrule 120 and an external face 130b of the membrane 130 defining the compaction chamber 170.

[0050] As illustrated in Figures 3 and 4, once the mold 110 is closed by the ferrule 120, an impregnation composition 50 is injected into the impregnation chamber 160. For this purpose, the injection orifice 111 is connected to an injection port 101, which is itself connected to an injection device (not shown in Figures 3 and 4) containing the impregnation composition. The discharge orifice 112 is connected to a discharge port 103, which can be connected to a pumping device (not shown in Figures 3 and 4) to create a pressure gradient between the injection orifice 111 and the discharge orifice 112, thus facilitating the distribution of the impregnation composition throughout the impregnation chamber 160.

[0051] Upon entering the impregnation chamber 160, the impregnation composition is deflected by the deflector 140 to be injected into it in the direction D140.

[0052] In the example described here and as indicated above, the outlet orifice 145 of the deflector 140 is in contact or almost in contact with an edge 41 of the fibrous texture 40. In this case, the impregnation composition first flows through a portion of the texture present in the vicinity of the edge 41 and then spreads throughout the entire impregnation chamber 160.

[0053] The amount of impregnation composition 50 introduced into the impregnation chamber 160 is determined according to the volume of the fibrous texture 40 to be impregnated. When the determined amount of impregnation composition 50 has been injected into the impregnation chamber 160, the injection port 101 and the discharge port 103 are closed.

[0054] As illustrated in Figures 7 and 8, an incompressible compaction fluid 60 is then introduced into the compaction chamber 170 via an injection port 102 connected to the injection orifice 121. The evacuation port 103 is opened initially to allow the air and possibly the excess impregnation composition 50 repelled by the compaction fluid 60 to be expelled, and then is closed in a second step to allow the compaction fluid to be pressurized.

[0055] The injection of the compaction fluid 60 into the compaction chamber 170 has the effect of pushing the membrane 130 towards the fibrous texture 40 and the internal surface 110a of the mold 110. As the compaction fluid is injected into the compaction chamber 170, the membrane 130 pushes both the impregnation composition 50 into the free space of the impregnation chamber 160 and into the fibrous texture.

[0056] At the end of the injection process, the incompressible compaction fluid 60 applies an isostatic pressure Pi to the membrane 130 and to the entire fibrous texture 40 via the membrane in order to force the impregnation composition 50 to penetrate the fibrous texture 40 and mold the latter into a predetermined shape. The consolidation pressure of the incompressible compaction fluid applied to the impermeable and deformable membrane is adjusted to a predetermined value, which can be between 1 and 20 bar.

[0057] According to the invention, the presence of the deflectors 140 and 150 protects the membrane from any contact with the edges 1110 and 1120 respectively of the injection orifices 111 and evacuation orifices 112. Thus, even when exerting significant pressure on the external face 130b of the membrane 130, there is no risk of damage to it, unlike prior art tooling where the orifices opening onto the internal surface of the mold are opposite the membrane.

[0058] A fibrous preform impregnated with a matrix precursor is then obtained. The transformation of the precursor into an organic matrix, namely its polymerization, is carried out by heat treatment, generally by heating the mold, after removal of any solvent and crosslinking of the polymer, the preform remaining in the mold, which has a shape corresponding to that of the part to be produced. The organic matrix can be obtained, in particular, from epoxy resins, such as, for example, high-performance epoxy resin, or from liquid precursors of carbon or ceramic matrices.

[0059] In the case of the formation of a carbon or ceramic matrix, the heat treatment consists of pyrolyzing the organic precursor to transform the organic matrix into a carbon or ceramic matrix, depending on the precursor used and the pyrolysis conditions. For example, liquid carbon precursors can be resins with a relatively high coke content, such as phenolic resins, while liquid ceramic precursors, particularly SiC, can be polycarbosilane (PCS), polytitanocarbosilane (PTCS), or polysilazane (PSZ) type resins.

Claims

Demands

1. Injection molding tooling (100) comprising: - a mold (110) having an internal surface (100a) on a portion of which the fibrous texture (40) is intended to be placed, - a membrane (130) opposite the internal surface (110a) of the mold (110), the space between the internal surface of the mold and an internal face (130a) of the membrane corresponding to an impregnation chamber (160), - at least one mold closure element (120) opposite an external face (130b) of the membrane (130), the space between said at least one mold closure element and the external face of the membrane corresponding to a compaction chamber (170), - one or more injection ports (111) opening onto the internal surface (110a) of the mold (110), each injection port (111) forming an edge (1110) on said internal surface of the mold opposite the membrane (130),characterized in that it further comprises a deflector (140) interposed between each injection orifice (111) and the membrane (130) and in that the deflector (140) has an internal cavity (141) in fluidic communication with the injection orifice and opening in at least one direction (Di40) parallel to the membrane (130) or perpendicular to a normal to the cross-section of the injection orifice.

2. Tooling according to claim 1, the tooling further comprising one or more discharge ports (112) present on the internal surface (110a) of the mold (110), each discharge port (112) forming an edge (1120) on said internal surface of the mold opposite the membrane (130), the tooling further comprising a deflector (150) interposed between each discharge port (112) and the membrane (130) and in that the deflector (150) has an internal cavity in fluidic communication with the discharge port (112) and opening in a direction parallel to the membrane (130) or perpendicular to a normal to the section of the discharge port.

3. Tooling according to claim 1 or 2, wherein each deflector (140, 150) comprises a shell (142) having a rounded shape.

4. Tooling according to any one of claims 1 to 3, wherein each deflector (140, 150) is removably mounted on the mold (110).

5. A method for injection molding a fibrous texture using an impregnation composition, the method comprising the following steps: - positioning a fibrous texture (40) on a molding surface present on an internal surface (110a) of a mold (110) of an injection molding tool (100), - placing a membrane (130) around the mold (110) so as to delimit an impregnation chamber (160) between the internal surface (100a) of the mold and an internal face (130a) of the membrane (130), the fibrous texture (40) being present in said impregnation chamber, - closing the mold (110) by at least one mold closing element (120), the space delimited between said at least one mold closing element and an external face (130b) of the membrane (130) forming a compaction chamber (170),- injection of an impregnation composition (50) through at least one or more injection orifices (111) opening onto the inner surface (110a) of the mold (110), each injection orifice (111) forming an edge (1110) on the inner surface (110a) of the mold (110) opposite the membrane (130), - introduction of a compaction fluid (60) into the compaction chamber (170) so as to apply, via the membrane (130), a pressure (Pi) on the fibrous texture (40), characterized in that a deflector (140) is interposed between each injection orifice (111) and the membrane (130) and in that the deflector (140) has an internal cavity (141) in fluidic communication with the injection orifice (111) and opening in at least one direction (Di40) parallel to the membrane (130) or perpendicular to a normal to the cross-section of the injection orifice.

6. A method according to claim 5, wherein the tooling further comprises one or more discharge ports (112) present on the internal surface (110a) of the mold (110), each discharge port (112) forming an edge (1120) on said internal surface of the mold opposite the membrane (130), the tooling further comprising a deflector (150) interposed between each discharge port (112) and the membrane (130) and in that the deflector (150) has an internal cavity in fluidic communication with the discharge orifice (112) and opening in at least one direction parallel to the membrane (130) or perpendicular to a normal to the discharge orifice.

7. Method according to claim 5 or 6, wherein each deflector (140, 150) comprises a shell (142) having a rounded shape.

8. A method according to any one of claims 5 to 7, wherein each deflector (140, 150) is removably mounted on the mold (110).

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