Tooling for local repair or remanufacturing of an edge of a part made of composite material
The tooling system addresses inefficiencies in composite material repair by enabling localized resin injection and heat treatment, facilitating fast and cost-effective repairs without disassembly, thus reducing energy costs and damage to undamaged areas.
Patent Information
- Application Number
- FR2024000958
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2044-01-31
AI Technical Summary
Existing methods for repairing composite material parts, such as blades, are inefficient, time-consuming, and costly, requiring disassembly, involve manual resin application with potential air bubble trapping, and heating the entire part, which can damage undamaged areas and increase energy costs.
A tooling system comprising movable blocks with heating elements and injection channels allows for localized repair of composite material edges without disassembly, using resin injection and heat treatment directly on the damaged area, reducing time and resource mobilization.
Enables quick, economical, and efficient repair of composite material edges directly under the wing or in a production plant, minimizing damage to undamaged areas and reducing energy consumption.
Smart Images
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Abstract
Description
Title of the invention: Tooling for local repair or rework of an edge of a part made of composite material. Technical field
[0001] The present invention relates to the field of repair with or without dismantling or remanufacturing of parts made of composite material and more particularly that of an edge of such parts such as blades or propeller blades made of composite material to be produced under wing, in a repair plant or in a production plant. Previous technique
[0002] During handling operations during manufacturing or during operation, the edges of composite material parts, such as the trailing edge of blades and / or the tips of composite material blades, can be damaged. Conventional methods for repairing composite material parts consist of depositing a resin in the damaged area, removing the excess resin, and curing the entire assembly in a vacuum oven. These methods are carried out manually and on a non-industrial scale.
[0003] The resin is generally applied by pouring, which makes it difficult to control the amount of resin applied to the damaged area. Other techniques involve applying the resin to the damaged area using a brush. While this method improves control over the amount of resin applied, it significantly lengthens the repair time. Furthermore, air bubbles can become trapped in the resin during application, creating porosity in the damaged area.
[0004] Regardless of the solution used, it is also necessary to remove the excess resin. Therefore, the repaired part is generally sanded or polished. This step can be delicate to perform as it risks damaging the underlying substrates of the part.
[0005] The polymerization of the part can be carried out under vacuum in an oven or autoclave. The vacuum is generally created using a vacuum bag, seals, and silicone. This polymerization technique has the disadvantage of requiring heating of the entire part, which can cause damage to undamaged areas. This is the case, for example, when the part is coated with paint. Furthermore, the need to heat the entire part increases the cost of the repair from an energy and economic standpoint.
[0006] Other methods propose an arrangement of pre-impregnated patches on the damaged parts of the part.
[0007] Prior art methods have the disadvantage of not being applicable under the wing, that is, when the part, such as a blade or propeller blade, is in service on the aircraft. Indeed, the part to be repaired is generally removed and sent to a repair factory.
[0008] Similarly, prior art processes cannot be implemented in a repair or production plant. In a production plant, they require the mobilization of all the resources needed for production, such as an oven, an impregnation chamber, etc. Their implementation in a production plant is problematic because it implies that certain equipment is no longer available for the production of parts during repairs. Their implementation is also not possible in a repair plant because the necessary equipment is generally not present in these facilities.
[0009] Thus, there is a real need to carry out a repair or remanufacturing of composite material parts under the wing, in a repair plant or in a production plant, without the disadvantages inherent in the aforementioned known processes. Description of the invention
[0010] To this end, the invention proposes a tool for local repair or remanufacturing of an edge of a part made of composite material, characterized in that it comprises a first block and a second block movable relative to each other between an open position and a closed position, each block having a central part and a peripheral part, the central parts of the blocks together defining a housing in the closed position, the housing being intended to accommodate a damaged part of an edge of a part to be repaired, the peripheral parts of each of the blocks being in contact with each other in the closed position, the tool further comprising at least one heating element configured to heat the housing, and at least one injection channel opening into said housing.
[0011] Such tooling makes it possible to repair the edge of an aircraft engine component, such as a blade or propeller blade edge, directly under the wing, in a repair shop, or in a production plant, simply and quickly. This is possible thanks to the tooling's design and compact size. Indeed, the tooling can be positioned on the area to be repaired without needing to disassemble the component, such as a blade or propeller blade, to perform the repair. Such tooling also allows for more economical and faster repairs than with prior art solutions. In fact, such tooling does not require This does not involve mobilizing the resources used for manufacturing the parts. Similarly, the resin injection and heat treatment take place locally on the damaged area. The process is less time-consuming because it avoids interventions on the part such as applying the resin with a brush to the damaged area, vacuum-sealing the entire part, or heating the entire part.
[0012] According to another particular feature, the tooling may further include at least one clamp holding the peripheral part of the first block in contact with the peripheral part of the second block in the closed position.
[0013] Such a clamp makes it possible to apply pressure to the two blocks of the tooling, thus facilitating holding in the closed position.
[0014] According to another particular feature, the tooling may include at least one heating element present inside the first block and / or the second block.
[0015] Thus, it is possible to further reduce the size and weight of the tooling and to optimize the heating of the housing containing the damaged edge portion. Indeed, such a configuration makes it possible to reduce the thickness of the material of the block to be heated before it reaches the housing. Similarly, the fact that the heating element is placed inside the block makes it possible to reduce the mass of at least one of the blocks and consequently the mass of the tooling.
[0016] According to a particular feature of the tooling, at least one heating element may be present inside the first block and the second block.
[0017] Thus, it is possible to have homogeneous heating on both sides of the edge of the part when the edge needs to be repaired on each side or over the entire thickness.
[0018] According to a particular feature of the tooling, the first block may include a first groove extending between an external edge and an internal edge of the peripheral part of said first block while the second block may include a second groove extending between an external edge and an internal edge of the peripheral part of said second block, the first groove and the second groove cooperating, in the closed position, to form an evacuation channel opening into the housing.
[0019] Thus, it is possible to facilitate the removal of any excess resin injected into the housing.
[0020] According to a particular feature, the tooling may further comprise at least one first damping plate disposed inside the housing. Such a plate facilitates the absorption of the pressure applied when closing the tooling and thus provides additional protection to the edge of the part being repaired.
[0021] According to a particular feature, the tooling may further comprise at least one first removable part disposed inside the central part of the first block and at least one second removable part disposed inside the central part of the second block, the first and second removable parts together defining in the closed position a determined shape of a part of an edge of a part to be repaired.
[0022] Such removable parts allow the shape of the housing cavity to be adapted to different edge shapes. Each removable part has a specific shape representing a portion of one side of a part's edge. Similarly, the first and second removable parts, when the tool is closed, define a specific thickness of a portion of a part's edge. These removable parts are interchangeable depending on the dimensions and shape of the part to be repaired. Thus, a single tool can be used to repair the edges of different part designs.
[0023] According to a particular feature, the tooling may further include a first damping plate disposed inside the housing on the first removable part, and a second damping plate inside the housing on the second removable part.
[0024] According to another aspect of it, the invention proposes a method for locally repairing or reworking an edge of a part made of composite material, characterized in that it comprises the use of a local repair tool according to the invention and in that it comprises the following steps: - a step of holding a damaged part of an edge of a part inside the housing defined by the central parts of the first block and the second block, - the injection of a resin into the housing through at least one injection channel, - the heat treatment of polymerization of the resin by said at least one heating element of the housing.
[0025] According to a particular feature of the method, the method may further include a clamping step using a clamp of the peripheral part of the first block against the peripheral part of the second block in the closed position.
[0026] Such a step makes it easier to keep the tooling in the closed position. Brief description of the drawings
[0027] Other features and advantages of the present invention will become apparent from the description given below, with reference to the attached drawings which illustrate an example of an embodiment without any limiting character.
[0028] [Fig-1] Fig. 1 schematically represents a tool in the open position in accordance with one embodiment,
[0029] [Fig.2] Fig.2 schematically represents the tooling of Fig.1 in the position of closing,
[0030] [Fig.3] [Fig.3] schematically represents blocks of the tooling of [Fig.1],
[0031] [Fig.4] [Fig.4] is a partial cross-sectional view of the tooling of [Fig.1] along direction IV-IV of [Fig.2],
[0032] [Fig.5] Figure [Fig.5] schematically represents a tool according to another embodiment,
[0033] [Fig.6a] Fig.6a schematically represents the first block of the tooling of Fig.5 when it is without a removable part,
[0034] [Fig.6b] Fig.6b schematically represents the first block of the tooling of Fig.5 when it includes a removable part,
[0035] [Fig.6c] Fig.6c schematically represents the first block of the tooling of Fig.5 when it includes a damping plate.
[0036] [Fig.6d] Fig.6d schematically represents the second block of the tooling of Fig.5 when it is without a removable part,
[0037] [Fig.6e] Fig.6e schematically represents the second block of the tooling of Fig.5 when it includes a removable part,
[0038] [Fig.6f] Fig.6f schematically represents the second block of the tooling of Fig.5 when it includes a damping plate.
[0039] [Fig.7] The [Fig.7] is a partial cross-sectional view of the tooling of the [Fig.5] along the VILVII direction of the [Fig.5]. Description of the implementation methods
[0040] The invention applies generally to the repair or remanufacturing of an edge of a part made of composite material, in particular but not exclusively an edge of a blade or propeller blade made of composite material. It employs a specific tool 300 which will be described here in relation to the repair of a blade made of composite material.
[0041] Figure 1 illustrates a tool 300 in the open position and Figure 2 illustrates the same tool 300 in the closed position. The tool 300 is intended to repair a blade 400 including a damaged part 401.
[0042] The tool 300 comprises a first block 100a and a second block 100b. Each block is movable relative to the other, between an open position illustrated in [Fig. 1] and a closed position illustrated in [Fig. 2]. In other words, the first block 100a and the second block 100b move from an open position in which they are separated from each other to a closed position in which they are in contact with each other.
[0043] Figure 3 illustrates the blocks of the tooling 300. As illustrated in Figure 3, the first block 100a has a central portion 102a and a peripheral portion 103a. Similarly, the second block 100b has a central portion 102b and a peripheral portion 103b. The central portion 102a of the first block 100a includes a first cavity 104a which has the shape of an intrados side of an edge 400 of a blade, as illustrated in the cross-sectional view of the tooling 300 in Figure 4. The central portion 102b of the second block 100b includes a second cavity 104b which has the shape of an extrados side of an edge 400 of a blade (Figure 4).
[0044] Figure 4 illustrates a cross-sectional view of the tool 300 along the IV-IV direction. As illustrated in Figure 4, when the tool 300 is in the closed position, the central parts 102a and 102b together define a recess 105. The recess 105 extends, along a thickness direction Z of the tool 300, between the first cavity 104a of the first block 100a and the second cavity 104b of the second block 100b.
[0045] The peripheral portion 103a of the first block 100a comprises a first face 106a, and the peripheral portion 103b of the second block 100b comprises a second face 106b. When the tooling 300 is in the closed position, the first face 106a of the peripheral portion 103a of the first block 100a is in contact with the second face 106b of the peripheral portion 103b of the second block 100b. The height of the housing 105, measured along the thickness direction Z, corresponds to the sum of a first height, along the thickness direction Z, separating the first cavity 104a from the first face 106a, with a second height, along the thickness direction Z, separating the second cavity 104b from the second face 106b.
[0046] The housing 105 is intended to accommodate a damaged portion of the edge of a blade 400 to be repaired. The height of the housing 105 may be greater than or equal to the thickness of the portion of the blade edge 400 to be repaired. In the example illustrated in [Fig. 4], the housing 105 has a height greater than the thickness of the portion 401 of the blade edge 400 to be repaired. Part of the height of the housing 105 is filled by two damping plates 1050a and 1050b, respectively in contact with the first indentation 104a of the central portion 102a of the first block 100a and with the second indentation 104b of the central portion 102b of the second block 100b. The damping plates 1050a and 1050b may contain silicone.
[0047] The arrangement of damping plates 1050a and 1050b inside the housing 105 is optional. For example, in an embodiment other than the one illustrated, the housing 105 may be without a damping plate. In this case, the height of the housing 105 may be equal to the thickness of the portion of the blade edge 400 to be repaired. According to another embodiment other than the one illustrated, only one damping plate may be present inside the housing 105. In the case of the with one or more damping plates in housing 105, the height of housing 105 corresponds to the cumulative thickness of the damping plate(s) and the part of the edge of the blade 400 to be repaired.
[0048] When the tooling 300 is in the closed position, as illustrated in [Fig.2], the peripheral part 103a of the first block 100a is in contact with the peripheral part 103b of the second block 100b, which makes it possible to form a seal between the face 106a of the peripheral part 103a of the first block 100a and the face 106b of the peripheral part 103b of the second block 100b.
[0049] The first block 100a and the second block 100b can be made of a material having a melting temperature above 150°C and inert with respect to a resin.
[0050] According to a particular feature of the tooling 300, the first block 100a and the second block 100b can be made of an epoxy resin having a melting temperature greater than or equal to 150 °C.
[0051] According to another particular feature of the tooling 300, the first block 100a and the second block 100b may be made of a metallic material having a melting point above 180°C. According to a particular feature of the tooling 300, the material of the first block 100a and the second block 100b may be selected from aluminum, steel, and titanium.
[0052] The tooling 300 further includes at least one heating element configured to heat the housing 105.
[0053] In the example illustrated in Figures 1 to 3, the tooling 300 comprises several heating elements, namely two first heating elements 110a and two second heating elements 110b. The first heating elements 110a are located inside the first block 100a and the second heating elements 110b are located inside the second block 100b.
[0054] The presence of a plurality of heating elements 110a and 110b respectively inside the first block 100a and the second block 100b makes it possible to accelerate the heating of the dwelling and to homogenize the heat within the dwelling 105. However, in an embodiment other than the one illustrated, the first block 100a may include a single heating element 110a and the second block 100b may include a single heating element 110b.
[0055] The number of heating elements 110a, 110b is not limited. Indeed, when only one intrados or extrados side of the blade edge is damaged, only block 100a or 100b located on the side to be repaired contains one or more heating elements. Thus, it is possible to locally heat the side of the blade edge to be repaired without unnecessarily heating the opposite side of the blade edge.
[0056] According to a particular feature of the tooling 300, each heating element 110a, 110b comprises a cylindrical shape as illustrated in [Fig. 4]. Such shape facilitates machining of tooling blocks 300 for accommodating heating element 110a or 110b.
[0057] The heating element 110a or 110b further comprises a gripping rod 111a, 111b as illustrated in [Fig. 2]. This facilitates positioning the heating element inside the tooling blocks 100a and 100b. The gripping rod 111a, 111b is made of a thermally insulating material. This feature facilitates handling the heating element when it is hot.
[0058] The tooling 300 further comprises at least one injection channel 150 opening into the housing 105. Such an injection channel 150 allows the injection of resin into the housing 105. The injection channel 150 includes a piston 151 that injects the resin into the injection channel 150. Such a piston facilitates the introduction of the resin through the injection channel 150. This configuration notably offers the possibility of injecting resin into the damaged side of the blade while the other side is undamaged. In an embodiment other than the one illustrated, the tooling may include a syringe instead of the piston 151 or any other resin injection device.
[0059] In the example illustrated in Figures 1 and 3, the tooling 300 includes an injection channel 150 extending through the second block 100b. The injection channel 150 passes, along a thickness direction Z, through the second block 100b and one of its ends opens into the housing 105.
[0060] The number of injection channels is not limited. Thus, in one embodiment, the first block 100a and the second block 100b may each be provided with one resin injection channel. In another embodiment, the first block 100a may comprise a plurality of injection channels and the second block 100b may comprise a plurality of injection channels. In yet another embodiment, either the first block 100a or the second block 100b may comprise a plurality of injection channels.
[0061] In the example illustrated in Figures 1 and 4, the tooling 300 further comprises a clamp 600. The clamp 600 holds the peripheral part 103a of the first block 100a in contact with the peripheral part 103b of the second block 100b. The clamp 600 applies a specific pressure to the first block 100a and the second block 100b to maintain the peripheral part 103a of the first block 100a in contact with the peripheral part 103b of the second block 100b. This makes it easier to hold the tooling in a closed position.
[0062] The tooling 300 further comprises a discharge channel 160 formed by a first groove 161a and a second groove 161b (Figures 3 and 4). The first groove 161a is formed on the face 106a of the first block 100a, which is in contact with the face 106b of the second block 100b when the tooling 300 is in the closed position. The second groove 161b is formed on the face 106b of the second block 100b, which is at The first groove 161a is in contact with the first block 100a when the tooling 300 is in the closed position. The first groove 161a extends between an inner edge 113a and an outer edge 123a of the first block 100a, the inner edge 113a of the first block 100a defining a first part of the housing 105, and the outer edge 123a of the first block 100a defining the outer contour of the first block 100a. The second groove 161b extends between an inner edge 113b and an outer edge 123b of the second block 100b, the inner edge 113b of the second block 100b defining a second part of the housing 105, and the outer edge 123b of the second block 100b defining the outer contour of the second block 100b. When the tooling 300 is in the closed position, the first groove 161a cooperates with the second groove 161b to form the cylindrical discharge channel 160. The discharge channel 160 opens into the housing 105. Such a channel facilitates the removal of any excess resin injected into the housing.
[0063] The number of drainage channels 160 is not limiting to the invention. Several drainage channels 160 can be arranged between the first block 100a and the second block 100b.
[0064] The discharge channel 160 has a closing plug 162 partially housed in the discharge channel 160 when the discharge channel 160 is in the closed position as illustrated in Figures 2 and 4. When the resin is injected into the housing 105, the plug 162 can be removed from the discharge channel 160 to allow the exit of any excess resin.
[0065] Figures 5, 6 and 7 illustrate a second embodiment of the tooling. This embodiment differs from that described in Figures 1 to 4 in that the tooling 200 is adaptable to different blade sizes and shapes.
[0066] In this embodiment, the first block 200a has a central portion 232a and a peripheral portion 233a. Similarly, the second block 200b has a central portion 232b and a peripheral portion 233b. The central portion 232a of the first block 200a includes a first cavity 237a shaped to receive a first removable part 234a as illustrated in [Fig. 6b]. The central portion 232b of the second block 200b includes a second cavity 237b shaped to receive a second removable part 234b as illustrated in [Fig. 6d].
[0067] As illustrated in [Fig. 6b], a first removable part 234a is disposed in the first cavity 237a of the central part 232a of the first block 200a. A second removable part 234b is disposed in the second cavity 237b of the central part 232b of the second block 200b as illustrated in [Fig. 6e]. When the tooling 200 is in the closed position, the first removable part 234a and the second removable part 234b together define a housing 230 having a specific shape for a portion of the blade, as illustrated in [Fig. 7].
[0068] Such a configuration of tooling 200 allows the same tooling to be used for repairing different blade shapes and sizes. Indeed, it is only necessary to change the removable parts 234a and 234b for tooling 200 to be adapted to repairing a different blade shape or size.
[0069] The height of the housing 230 may be greater than or equal to the thickness of the portion of the blade edge 400 to be repaired. In the example shown in [Fig. 7], the housing 230 has a height greater than the thickness of the portion of the blade edge 400 to be repaired. In the example shown, the height of the housing 230 is partially filled by two damping plates 2350a and 2350b. A first damping plate 2350a is arranged on the first removable part 234a and a second damping plate 2350b is arranged on the second removable part 234b as shown in Figures 6c and 6f respectively. The first damping plate 2350a is in contact with a first face 2341a of the first removable part 234a, and the second damping plate 2350b is in contact with a second face 2341b of the second removable part 234b. The damping plates 2350a and 2350b may contain silicone.
[0070] The arrangement of damping plates inside the housing 230 is optional. For example, in an embodiment other than the one illustrated, the housing 230 may not have a damping plate. In this case, the height of the housing 230 may be equal to the thickness of the portion of the blade edge 400 to be repaired. According to another embodiment other than the one illustrated, only one damping plate is present inside the housing 230. In this case, the height of the housing 230 may correspond to the sum of the thicknesses of the damping plate and the portion of the blade edge 400 to be repaired.
[0071] The tooling 200 illustrated in Figures 5, 6, and 7 further comprises at least one injection channel 270 opening into the housing 230. Such an injection channel 270 allows the injection of resin into the housing 230. The injection channel 270 includes a piston 271 that injects the resin into the injection channel 270. The piston 271 is adapted to push the resin through the injection channel 270. Such a piston 271 facilitates the introduction of the resin through the injection channel 270 and consequently the distribution of the resin into the housing 230. In an embodiment other than the one illustrated, the tooling may comprise a syringe instead of the piston 271.
[0072] In [Fig. 7], the tooling 300 includes an injection channel 270 formed inside the second block 200b. The injection channel 270 passes through the second block 200b, along a thickness direction Z, and one of its ends opens into the housing 230. The injection channel 270 is positioned at the center of the second block 200b in a plane perpendicular to the thickness direction Z of the tooling 200. This arrangement facilitates a homogeneous distribution of the resin in the housing 230.
[0073] An example of the local repair process for a blade edge made of composite material is now described. The process is carried out using the tooling described previously. In a first step, the part of the blade edge to be repaired is held inside the housing 105 or 230 (Figures 2 and 5).
[0074] Next the process is followed by a step of injecting a resin into the housing 105 or 230.
[0075] According to a particular feature of the process, the injection of the resin is carried out by a piston 151, respectively 271, through the injection channel 150, respectively 270. However, other injection methods may be used.
[0076] Examples of resins that can be used are polyester resins, epoxy resins and phenolic resins.
[0077] The process is then followed by a heat treatment step to polymerize the resin, implemented, for example, using the heating element(s) described above. The polymerization process is carried out at a temperature between 25°C and 200°C.
[0078] The process is followed by a demolding step during which the repaired part of the blade edge is removed from the tooling.
[0079] The first step, namely the step of holding the damaged portion of the edge in the housing, may be preceded by a step of positioning one or more cushioning plates inside the housing. This step facilitates the absorption of the pressure applied when closing the tooling and thus provides further protection for the portion of the blade edge to be repaired.
[0080] The positioning step of one or more damping plates may be preceded by a positioning step of a first removable part inside the central part of the first block and of a second removable part inside the central part of the second block.
[0081] The method further includes a step of clamping the peripheral part of the first block against the peripheral part of the second block. Clamping can be carried out with a clamping device such as the 600 clamp illustrated in Figures 1 and 5. Other clamping devices can also be considered.
Claims
Demands
1. Tooling (200, 300) for local repair or rework of an edge of a part (400) made of composite material, characterized in that it comprises a first block (100a, 200a) and a second block (100b, 200b) movable relative to each other between an open position and a closed position, each block having a central portion (102a, 102b, 232a, 232b) and a peripheral portion (103a, 103b, 233a, 233b), the central portions of the blocks together defining a housing (105, 230) in the closed position, the housing being intended to accommodate a damaged portion of an edge of a part to be repaired, the peripheral portions of each of the blocks being in contact with each other in the closed position, the tooling further comprising at least one heating element (110a, 110b) configured to heat the dwelling, and at least one injection channel opening into said dwelling.
2. Tooling according to claim 1, further comprising at least one clamp (600) holding the peripheral part (103a, 233a) of the first block (100a, 200a) in contact with the peripheral part (103b, 233b) of the second block (100b, 200b) in the closed position.
3. Tooling according to claim 1 or 2, wherein said at least one heating element (110a, 110b) is present inside the first block (100a, 200a) or the second block (100b, 200b).
4. Tooling according to any one of claims 1 to 3, wherein at least one heating element (110a, 110b) is present inside the first block (100a, 200a) and the second block (100b, 200b).
5. Tooling according to any one of claims 1 to 4, wherein the first block (100a) comprises a first groove (161a) extending between an outer edge and an inner edge of the peripheral part of said first block (100a) and wherein the second block (100b) comprises a second groove (161b) extending between an outer edge and an inner edge of the peripheral part of said second block (100b), the first groove (161a) and the second groove (161b) cooperating in the closed position to form a drainage channel opening into the housing.
6. Tooling according to any one of claims 1 to 5, further comprising at least a first damping plate (1050a, 1050b, 2350a, 2350b) disposed inside the housing (105, 230).
7. Tooling according to any one of claims 1 to 6, further comprising at least one first removable part (234a) disposed inside the central part of the first block (200a) and at least one second removable part (234b) disposed inside the central part of the second block (200b), the first and second removable parts together defining in the closed position a determined shape of a portion of an edge of a part (400) to be repaired.
8. Tooling according to claim 7, further comprising a first damping plate (2350a) disposed inside the housing on the first removable part (134a), and a second damping plate (2350b) inside the housing (230) on the second removable part (134b).
9. A method for locally repairing or reworking an edge of a part (400) made of composite material, characterized in that it comprises the use of a local repair tool according to any one of claims 1 to 8 and in that it comprises the following steps: - a step of holding a damaged part of a part edge (400) inside the housing (105, 230) defined by the central parts of the first block (100a, 200a) and the second block (100b, 200b), - the injection of a resin into the housing (105, 230) through at least one injection channel (150, 270), - the heat treatment of polymerizing the resin by said at least one heating element (110a, 110b) of the housing (105, 230).
10. Method according to claim 9, further comprising a clamping step by a clamp (600) of the peripheral part (103a, 233a) of the first block (100a, 200a) against the peripheral part (103b, 233b) of the second block (100b, 200b) in the closed position.