• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    device for making a housing made of a composite material and method of manufacture using such a device. the present invention relates to a device for manufacturing a reactor housing of a turbomachinery made of composite material, in which the mold (16) comprises a cylindrical body (22) with a longitudinal axis and lateral flanges (24) , and in which the countermold (18) comprises a cylindrical body (30) and side counterflanges (32) where the counterflanges (32) are intended to be firmly attached to the flanges (24), where the body (22) of the mold (16 ) and the body (30) of the countermold (18) are concentric, where the preform (p) is destined to be positioned between the body (22) of the mold (16) and the body (30) of the countermold (18) , and in which the material of the mold body (22) (16) has an appreciably higher expansion coefficient than that of the countermold body (30) (18).
    公开号:BR112012026929B1
    申请号:R112012026929-1
    申请日:2011-04-20
    公开日:2020-07-14
    发明作者:Romain Plante；Jean-Pierre Cauchois；Louis Betega；Jean-Louis Robert Marcel Castanie
    申请人:Snecma；
    IPC主号:
    专利说明:

    DESCRIPTION TECHNICAL FIELD AND PREVIOUS TECHNIQUE
    [001] The present invention relates to a device for manufacturing objects made of a composite material, specifically objects that have high mechanical and sizing requirements, for example, turbomachinery housings, such as reactor housings. The present invention also relates to a method for making objects made of composite material using such a device.
    [002] Conventionally a turbojet comprises, moving from upstream to downstream, a low pressure compressor, or reactor, a high pressure compressor, a combustion chamber, a high pressure turbine and a low pressure turbine.
    [003] In addition, the turbojet comprises an external housing or reactor housing, an internal housing and an intermediate housing concentric with the first two housings and dividing the space bounded between the external and internal housings in a primary air path used for the compression and subsequently for the expansion of the propellant gases, and a secondary air path in which the dilution air flows.
    [004] The reactor housing has several functions. Specifically, this defines the air intake duct inside the engine. Another of its functions is to form a containment housing that forms a debris retainer that holds debris, such as aspirated objects or fragments of damaged blades designed by centrifugation, so that they do not reach other parts of the plane.
    [005] It is generally sought to reduce the mass of the turbojet, and for this purpose to reduce the mass of the various elements that comprise it. One of the solutions to achieve this result is to manufacture parts of lower density material.
    [006] The reactor housing is made of aluminum alloy; it is therefore lighter than a steel reactor housing.
    [007] However, it is sought to reduce this mass further. Composite materials are an interesting option. Actually, the parts that can be made of a composite material are those that are not exposed to excessively high temperatures, which is the case with the reactor housing, since the temperature to which it can be subjected is of the order of - 50 ° C to a maximum of 120 ° C. Reactor housings or containment housings made of composite material are known in the best modern technique, for example, from EP 1 961 923. The reactor housings are made of a fibrous preform by three-dimensional weaving around a mandrel. During manufacture, the preform is covered with a flexible housing with which the mandrel defines a sealed space. A vacuum pressure is established between this sealed space and a resin is introduced into the space; impregnation is then facilitated by vacuum pressure. A polymerization step of the resin then takes place.
    [008] A blank is then obtained directly allowing the housing to be obtained after machining.
    [009] This method is called the "infusion method". This has the advantage that it requires relatively light equipment. However, the time required to manufacture a part is relatively long. In addition, it is inefficient in eliminating preform flaws if the woven fibers swell, and cannot guarantee the part's geometry.
    [0010] There is another method by injection of liquid resin, called RTM (Resin Transfer Molding), which consists of placing the preform between a rigid mold and a rigid countermold, and securely holding them together. The space delimited in this way has the final dimensions of the object to be manufactured, and the resin is injected under pressure. The injection pressure can be as high as 1.5 MPa (15 bar).
    [0011] This method has the advantage that it has a relatively short cycle period. In addition, due to the use of a rigid countermold, swelling can be controlled. On the contrary, it requires the use of "heavy weight" equipment, which is difficult to handle, specifically in the case of large parts, since it must withstand the injection pressure. In addition, if the swelling is too great, difficulties arise when the mold is installed, and when the mold is closed.
    [0012] It should be noted that such a carcass can have a very large diameter, for example, in the order of 2 m. Consequently, the mold and the countermold are of substantial size and mass; their handling is therefore laborious.
    [0013] It is, therefore, an objective of the present invention to provide a device for manufacturing parts made of composite material, specifically turbomachine housings, which allows the parts to be obtained with a very large dimensional accuracy, while being relatively "light" and easy to manipulate.
    [0014] Another objective of the present invention is to provide a method for manufacturing parts made of composite material which is relatively simple to implement, and which allows parts with the desired dimensions to be obtained. DESCRIPTION OF THE INVENTION
    [0015] The objectives presented above are obtained by means of a manufacturing device comprising a rigid mold and a rigid countermold, where the material forming the internal mold has a much higher expansion coefficient than the material which at least partially forms the countermold, and a means for injecting a resin between the mold and the countermold at a relatively low pressure of less than 0.4 MPa (4 bar).
    [0016] The difference in expansion between the mold and the countermold that results from this during the manufacture of the part, which is carried out at high temperature, causes the preform which was previously impregnated at low temperature to be compacted, guaranteeing the dimensional accuracy of the part. In addition, the device, specifically the countermold, can be of a lighter weight structure, since the injection pressure is low. Furthermore, the mold, when cold, has internal dimensions which are larger than the final dimensions sought for the object; installation of the counter mold on the mold is facilitated despite swelling.
    [0017] The countermold is made, for example, of a composite material. It thus expands very little at high temperature. In addition, it is relatively light and therefore more easily manipulated.
    [0018] Due to the invention the device can be relatively light due to the relatively low injection pressure. However, the device allows the resin to be injected under pressure. The vacuum pressure generated within the space between the mold and the countermold ensures that the preform is satisfactorily wet.
    [0019] If the countermold has flanges for fixing to the mold, these flanges are advantageously made of a material with an expansion coefficient close to or equal to that of the mold material.
    [0020] The subject of the present invention is therefore mainly a device for manufacturing parts made of a material composed of a preform made of woven fibers, which comprises a rigid mold and a countermould that delimits a space destined to receive a preform made of woven fibers, where the mold is made of a material with an appreciably higher expansion coefficient than that of the countermold, and where said device also comprises a pressurized injection means of a resin within said space.
    [0021] In a specifically advantageous manner, the countermold is made of a composite material, the mold is then preferably made of steel or an aluminum alloy.
    [0022] The device according to the invention can advantageously comprise a means capable of generating a vacuum pressure within the space bounded by the mold and the countermold. The device according to the present invention allows parts with a rotational shape to be manufactured, such as a reactor housing of a turbomachinery; for this purpose the mold comprises a cylindrical body with a lengthwise geometric axis and lateral flanges. The countermold comprises a cylindrical body and side counter flanges, where the counter flanges are intended to be firmly attached to the flanges, and where the mold body and the counter body are concentric. The preform is intended to be positioned between the mold body and the countermold body. The material of the mold body has an expansion coefficient which is appreciably higher than that of the countermold body.
    [0023] In a preferred mode, the difference between the expansion coefficients of the mold and the countermold is greater than or equal to 23.10 '6. In a very advantageous manner, the device according to the invention comprises a means for exerting a holding force along the lengthwise axis on the counter flanges towards the outside of the mold, and a means for exerting a retention force radial over the counterflanges aligned with the geometric axis in the length direction. The forces required to hold the countermold in the mold are therefore small, and the risks of deformation of the preform are also small.
    [0024] The countermold flanges and mold flanges preferably have similar or equal expansion coefficients.
    [0025] Advantageously, the sides of the countermold body in contact with the counter flanges are inclined in relation to the geometric axis in the direction of the length.
    [0026] Counterflanges can be made of several portions; the coincident surface between two portions of a counterflange is preferably inclined with respect to the geometric axis in the length direction, allowing data on the seals between the counterflange portions to be limited.
    [0027] Another subject of the present invention is a method for making a turbomachine housing using the manufacturing device according to the present invention, which comprises the steps of:
    [0028] manufacture of a preform made of woven fibers,
    [0029] installation of the preform on the mold,
    [0030] installation of the counterform on the preform,
    [0031] application of the retention forces,
    [0032] injection of the resin under pressure and heating of the device,
    [0033] polymerization of said resin,
    [0034] removal of the countermold and mold.
    [0035] During step d) the applied forces are both axial forces on the counterflanges along the lengthwise axis towards the outside, and radial forces on the counterflanges towards the inside.
    [0036] After polymerization the retention forces are loosened and the countermold and mold are left in position. BRIEF DESCRIPTION OF THE ILLUSTRATIONS
    [0037] The present invention will be better understood using the description which follows and the accompanying illustrations, in which:
    [0038] Figure 1 is a general view of a turbojet the reactor housing which can be manufactured by means of the device and method according to the invention,
    [0039] Figure 2 is a sectional view of the reactor housing which can be manufactured using the device and the method according to the present invention,
    [0040] Figure 3 is a sectional view of an exemplary embodiment of a manufacturing device according to the present invention,
    [0041] Figure 4 is a perspective view of the mold of a manufacturing device according to the present invention,
    [0042] Figure 5 is a sectional view along the length of a modality variant of the device of Figure 3,
    [0043] Figure 6 is a sectional view of an example of an advantageous embodiment of the manufacturing device according to the present invention,
    [0044] Figure 7 is a top view of the device of Figure 6 showing the coinciding surfaces between the counterflanges of the countermold,
    [0045] Figure 8 is a diagrammatic representation of an example of a set of counter flanges that corresponds to Figure 7. DETAILED DESCRIPTION OF SPECIFIC MODALITIES
    [0046] The invention will be described below in the context of its application to the manufacture of a turbojet reactor housing. However, the present invention can be applied to the manufacture of any object made of a composite material that has a rotational geometric axis, and more generally to any object made of a composite material.
    [0047] In Figure 1, an X1 geometry axis turbojet can be seen equipped with a reactor housing according to the present invention. This housing comprises moving from upstream to downstream in the direction of gas flow, a reactor 2 positioned at the engine inlet, a compressor 4, a combustion chamber 6, a high pressure turbine 8 and a low pressure turbine 10.
    [0048] The turbojet is housed inside a housing that comprises several portions which are different elements of the turbojet. The reactor 2 is thus surrounded by a reactor housing 12.
    [0049] In Figure 2, a sectional view can be seen of the reactor housing 12 with geometrical axis X1 formed of a cylindrical body 12.1 and flanges positioned on the longitudinal ends 12.2 of the cylindrical body 12.1.
    [0050] In Figure 3, an example of an embodiment of a device 14 for manufacturing a housing made of a composite material can be seen in accordance with the present invention implemented using the injection method in accordance with the present invention. The carcass is made of a preform P produced by weaving fibers.
    [0051] The device 14 has a general rotational profile around a geometric axis X. The device comprises a mold 16 and a countermold 18.
    [0052] The mold 16, which is represented in perspective in Figure 4, is made of a material that has a certain stiffness, such as, for example, a metallic material, and that has an expansion coefficient d. The mold 16 is made, for example, from steel or an aluminum alloy.
    [0053] The mold defines the internal shape of the reactor housing 12. As can be seen in the example shown in Figure 4, the mold has the shape of a ring; it comprises an annular cavity 20 designed to accommodate the preform P made of woven fibers. The annular cavity 20 is delimited between a cylindrical body 22 of geometric axis X, which has a circular section, and flanges 24 at each of the longitudinal ends of the body 22. The cylindrical body 22 therefore comprises a radially external face 22.1 destined to enter contact with the interior of the housing when injection and polymerization are completed.
    [0054] The cylindrical body 22 can be produced as a single piece. Each flange 24 can also be produced as a single piece, or as several angular portions.
    [0055] The flanges 24 are attached to the cylindrical body 22, for example, by means of screws 26, symbolically represented by their geometric axes, in order to produce a rigid set. These screws are distributed angularly over the entire periphery of the flanges.
    [0056] Flanges 24 and body 22 can be made of the same material, or of materials that have expansion coefficients of similar values.
    [0057] Counter mold 18 has an annularly shaped matching cavity 22 of the mold so that when counter mold 18 is positioned inside the mold 16, a space 28 is delimited for the manufacture of the housing. Space 28 is designed to accommodate the woven fiber preform and resin.
    [0058] Counterform 18 is intended to define the external shape of the housing. The latter is also in the shape of a ring, with an annular body 30 with geometric X axis and counterflanges 32 at each of the longitudinal ends of the body 30. The body 30 will be called the "outer body", and the body 22 will be called the "internal body".
    [0059] The outer body 30 consists of at least two portions, and preferably 3, in the form of an arc of a circle, to allow it to be installed around the preform. The closing sequence will be executed in the order described in Figure 8 (I, II, III, IV). Counterflanges 32 are also made in several portions, at least two.
    [0060] The outer body 30 therefore comprises a radially inner face 30.1 intended to come into contact with the radially outer surface of the substrate when injection and polymerization are complete.
    [0061] In a preferred mode, in the case of the reactor housing, the flange ridges 32.1, 32.2 positioned longitudinally from the outside define the radii between the tubular body 12.1 and the flanges 12.2 of the housing. This configuration facilitates the manufacture of the equipment, as well as the mold release of the part. For example, the different portions of the outer body are held in place by mooring.
    [0062] According to the present invention, the outer body 30 is made of a material that has an expansion coefficient c2 which is appreciably lower than d, of the inner body 22.
    [0063] The difference between the expansion coefficients d and c2 is preferably on the order of 23.10'6 K'1.
    [0064] The expansion coefficient of the material that constitutes the mold is, for example, between 23.10'6 K1 and 12.10'6 K'1, and the expansion coefficient of at least a portion of the countermold is, for example, between 0 and 23.10'6 K'1.
    [0065] The outer body 30 is advantageously made of a composite material, which has a much lower expansion coefficient than that of steel or aluminum. Furthermore, composite materials expand only slightly; consequently their shapes and dimensions vary only slightly, or very slightly, when heated. The countermold made of composite material thus has the desired final dimensions of the object.
    [0066] Conversely, mold 16, which expands substantially, has, when cold, that is, at room temperature, internal dimensions which are smaller than the final external dimensions of the object and, when hot, that is, in injection temperature, internal dimensions equal to those expected for the object.
    [0067] In the case of an inner body 22 made of aluminum, the outer body 30 can be made of steel.
    [0068] Counterflanges 32 are advantageously made of a material with an expansion coefficient close to or equal to that of flanges 24. For example, counterflanges 32 and flanges 24 are made of the same material. Indeed, as the counterflanges 32 are intended to be attached to the flanges 24, it is therefore preferable that both of these portions have similar expansion properties.
    [0069] The manufacturing device according to the invention also comprises a means for injecting resin under pressure into space 28. The mold is traversed by at least one channel 36 that forms an injector that emerges within space 28 and connected to a supply of pressurized resin. The injection channel 36 is made on one of the flanges 24. Advantageously, several injection channels 36 are distributed angularly across the entire flange 24. The injection pressure is preferably less than 0.4 MPa (4 bar), for example example, from 0.2 MPa to 0.3 MPa (2 to 3 bar).
    [0070] The other flange 24 is crossed by at least one ventilation channel 38, to allow the air contained within the space 28 to be evacuated during the injection. Furthermore, it is possible with this ventilation channel to allow it to be detected when a sufficient amount of resin has been injected, when the resin escapes through this channel 38. Advantageously, several ventilation channels 38 are distributed angularly on the other flange 24.
    [0071] As a variant, the injection and ventilation channels can be made in the countermold.
    [0072] The counterflanges 32 of the countermold 18 are attached to the mold flanges, for example, by screws 42 symbolically represented by their geometric axes parallel to the geometric axis X, where each screw passes through an entire flange and the counterflange opposite this flange . The screws 42 are advantageously in the form of hinge screws installed articulated on the flanges. The installation of the countermold is then simplified.
    [0073] The different parts of the device delimit a space 28 which is appreciably sealed against the resin.
    [0074] For this purpose, seals (not shown) are included among the different elements of the manufacturing device.
    [0075] There are seals, for example, O-rings, between the inner body 22 and the flanges 24. There are seals, for example, O-rings, between the outer body 30 and the counterflanges 32. There are also seals between the different portions flanges 24, between the different portions of the counter flanges 32, and between the different portions of the outer body 30. There are seals, for example, O-rings, between the counter flanges 32 and the flanges 24.
    [0076] In a preferential way, the seals between the inner body 22 and the flanges 24, and between the outer body 30 and the counterflanges 32 are positioned as close as possible to the space 28, preventing the resin from penetrating excessively between the parts of the device.
    [0077] The seals are made, for example, of silicone.
    [0078] The manufacturing device according to the invention also advantageously comprises a means for creating a vacuum pressure within space 28. Ventilation channels 38 can then be used to produce vacuum pressure within space 28. For this purpose Finally, space 28 is also designed so that it is air tight.
    [0079] For example, it may be decided to cover the inside of the countermold with a balloon in order to produce the seal between the counterflanges and the internal body.
    [0080] The production of a vacuum pressure within the space 28 before the injection improves the impregnation of the preform.
    [0081] The vacuum pressure level produced within space 28 is, for example, in the order of 0.1 MPa (1 bar).
    [0082] In Figure 5, an advantageous variant of the assembly between the outer body 30 and the counterflanges 32 of the countermold 18 can be seen. In this variant, each flange 24 comprises on its radially internal face a groove 32.1 formed in the internal crest and accommodating a crest 30.2 of the outer body 30. This assembly facilitates the production of the seal between the flanges 24 and the outer body 30.
    [0083] In Figure 6 another specifically advantageous embodiment of a manufacturing device 114 according to the present invention can be seen, allowing the forces required to install the countermold on the mold to be reduced.
    [0084] The references used to designate the elements of the device in Figure 3 will be used to designate the elements of the device in Figure 6.
    [0085] The manufacturing device 114 of Figure 6 differs from the device 14 of Figure 3 in which a radial retention means has been added. The device of Figure 6 comprises a mold 16 of geometric axis X and a countermold 18 concentric with the mold 16.
    [0086] The mold 16 comprises an internal body 22 and flanges 24 at its longitudinal ends. Counter-mold 18 comprises an outer body 30 and counter-flanges 32.
    [0087] In addition, the device 114 according to Figure 6 comprises means for applying a longitudinal holding force in the direction of the exterior of the device between each counter flange 32 and associated flange 24. These means are, for example, screws 42 that traverse the counter flanges 32 and the flanges 24. The screws are advantageously of the type of articulated screw installed articulated on the counter flanges. The flanges 24 comprise notches within which the screws are positioned when the retention is applied. A nut is screwed onto each screw opposite the counter flange relative to the flange, and exerts a holding force on the counter flange in the outward direction, as symbolized by the arrows designated FS1.
    [0088] These retaining means are installed angled over the entire periphery of the device.
    [0089] The manufacturing device according to this advantageous example also comprises a means for exerting a radial holding force on the counterflanges in the direction of the geometric axis X. In the example shown, this radial force represented symbolically by the arrows FS2 is exerted through stop blocks 43 added to the flanges 24 upstream of the counterflanges 32 in the direction of the arrows FS2. Locking screws 44, symbolically represented by their geometric axes, are installed on the stop blocks 42 and press against the counterflanges 32 radially in the direction of the geometric axis X.
    [0090] Mechanical stops are advantageously installed to limit the radial and axial holding forces.
    [0091] Furthermore, the sides 46 of the outer body 30 that come into contact with the counterflanges 32 are advantageously inclined in relation to the radial direction in the direction of the interior, advantageously at 45 °. The sides 48 of the counter flanges in contact with the sides 46 are also inclined in a similar manner. When differential expansion occurs, the sloping sides allow the clearances to be controlled, in order to preserve the seal. Counterform 18 is then subjected to axial holding forces FS1 and radial holding forces FS2. The resulting holding force FSR is then tilted towards the outside of the mold. FSR forces are not represented at scale. The effect of this combination of axial and radial holding forces is to effectively compact the flanges of the preform, and therefore limit the forces required to install the countermold on the mold, specifically if there is substantial swelling of the preform.
    [0092] Furthermore, as can be seen in Figure 7, which represents a top view of a countermold according to the invention, the matching surfaces 50 between two successive portions of the countermold flanges are preferably inclined in relation to the direction axial retention. The angle of inclination a is at least 45 °,
    [0093] In Figure 8 an example of portions I, II, III, IV that form the counterflanges 32 of the countermold of a manufacturing device according to the invention can be seen represented diagrammatically.
    [0094] The surfaces coinciding between the portions that form the outer body 30 made of a composite material are, for example, straight.
    [0095] This device is specifically useful in the case of preforms that have a swelling greater than or equal to 20%.
    [0096] A manufacturing method according to the present invention will now be described for a reactor housing made of a composite material using the manufacturing device of Figure 6.
    [0097] In an initial stage a preform P made of woven fibers is produced.
    [0098] The preform P can be produced on a weaving loom, brought to the injection installation and positioned around the mold 16. The preform P is, for example, made by three-dimensional weaving.
    [0099] The fibers are, for example, carbon, glass or Kevlar® fibers, and the resin is, for example, an epoxy resin.
    [00100] When the preform is installed on the mold 16, the counter mold 18 is installed on the mold 16 against the preform. To do this, the different portions of the counter flanges 32 and the outer body 30 are installed. A holding force FS2 radially aligned towards the inside of the mold 16 is exerted on the counterflanges 32 by means of screws 44, and an axial holding force FS1 towards the outside is also exerted on the counterflanges 32 by means of hinge screws. 42. It should be noted that there are no mechanical connections between the counterflanges and the outer body of the countermold 30, to tolerate the differences in expansion between the counterflanges and the outer body of the countermold 30.
    [00101] As previously mentioned, the mold when cold has internal dimensions which are smaller than the final dimensions of the housing. Installing the preform P within the mold, and closing the mold with the countermold, is then made easier, even if there is substantial swelling of the preform.
    [00102] By means of the device of Figure 6, and the combined application of axial and radial holding forces, the installation of the countermold on the mold requires a small force, which reduces the risk of damaging the preform and the seals.
    [00103] A vacuum pressure of the order of 0.1 MPa (1 bar) is then advantageously produced within space 28.
    [00104] In a subsequent step, under a maximum pressure of 0.4 MPa (4 bar), the resin is injected into space 28 through the injection channels, and the air escapes simultaneously through the ventilation channels.
    [00105] The resin then impregnates the preform. Impregnation is facilitated by combining vacuum pressure and injection pressure.
    [00106] The injection is performed at a temperature in the range of 160 ° C- 180 ° C.
    [00107] At this temperature the materials of the inner body 22 and the outer body 30 expand. And it is mainly the mold body that expands, causing the face 22.1 of the inner body 22 to move radially towards the outside. The face 30.1 of the body of the countermold 18 has a radial position practically unchanged.
    [00108] As it expands, the mold approximately takes on the internal dimensions of the housing.
    [00109] The differential expansion causes a compaction of the preform impregnated with the non-polymerized resin, that is, of any folds that may have appeared when the preform was produced and installed inside the mold.
    [00110] Due to this compaction the dimensional accuracy of the parts is increased.
    [00111] Due to the invention an automatic compaction of the preform can therefore be seen, before the polymerization of the resin. So it is no longer necessary to perform any compression before installing the countermold.
    [00112] Due to the invention the parts can be produced with a very high precision, with a swelling which can be as high as 20%.
    [00113] A polymerization step then occurs when the preform and the resin satisfy the expected dimensional conditions.
    [00114] While still hot the counter mold is then released from the mold in order to prevent stresses on the part.
    [00115] After cooling the counter mold and then the mold are removed. During cooling, the mold returns to its initial dimensions; it then no longer applies any tension to the molded part. Mold release is then facilitated.
    [00116] The part obtained from this mold forms a blank which will then be generally machined.
    [00117] As an example, if the mold is made of aluminum alloy and the outer body 30 of the countermold is made of steel, for a piece of diameter 2 m, for a temperature of 160 ° C, the expansion will be: - approximately 7.5 mm for the aluminum alloy mold, and - approximately 3.75 mm for the steel countermold.
    [00118] Due to the invention an additional compaction of approximately 3.75 mm is obtained.
    [00119] The injection conditions related to the manufacturing device according to the present invention allow a faster impregnation of the preform. The cycle period is therefore short. This is particularly useful, as resin impregnation should occur relatively quickly, over approximately 20 minutes.
    [00120] The manufacturing device is easier to handle. Indeed, the different portions of the countermold can easily be installed and removed, specifically when a portion of the countermold is made of a composite material, and as a consequence of the separation between the counterflanges and the outer body. The installation and removal times are therefore short, further reducing the cycle time.
    [00121] The manufacturing device according to the present invention applies to the manufacture of all parts made of composite material, whether or not they have a rotational geometric axis.
    [00122] Furthermore, this is specifically suitable for the production of large asymmetric parts.
    [00123] The described means of retention and fixation is not restrictive, and all other means available to the one skilled in the art are applicable.
    [00124] Furthermore, the structure of the manufacturing device of Figures 3, 5 and 6 is suitable for the manufacture of a reactor housing equipped with flanges; however, this housing can be modified to manufacture, for example, a housing without flanges.
    [00125] The device according to the invention is also suitable for the manufacture of parts, the type of body elements, and also covers. In this case, the base of the mold is formed to match the shape of the part to be manufactured, and the countermold is applied on top of the preform.
    权利要求:
    Claims (14)
    [0001]
    1. Device for manufacturing parts made of material composed of a preform (P) made of woven fibers, characterized by the fact that it comprises a rigid mold (16) configured to contain the preform (P), the mold (16 ) comprising a cylindrical body (22) with a geometric axis in the length direction (X) and lateral flanges (24); a countermold (18) comprising a cylindrical body (30) and side counter flanges (32), the counter flanges (32) being configured to be firmly attached to the side flanges (24) of the mold (16), the cylindrical body (22) of the mold (16) and the cylindrical body (30) of the countermold (18) being concentric, the preform (P) being intended to be positioned in a space bounded by the cylindrical body (22) of the mold (16) and the cylindrical body ( 30) of the countermold (18), a material of the mold body (22) having a higher expansion coefficient than that of the cylindrical body (30) of the countermold (18); an injection medium (36) under pressure of a resin within said space (28), and said injection pressure being less than 0.4 MPa (4 bar), and a medium capable of producing a vacuum pressure within the space (28) delimited by the mold (16) and the countermold (18), where the counterflanges (32) and flanges (24) have equal coefficients of thermal expansion.
    [0002]
    2. Manufacturing device according to claim 1, characterized by the fact that the difference between the expansion coefficients of the mold and the countermold is less than or equal (MB) to 23.10'6K'1.
    [0003]
    Manufacturing device according to claim 1, characterized by the fact that the countermold (18) is made of a composite material.
    [0004]
    4. Manufacturing device according to claim 1, characterized by the fact that the mold (16) is made of steel or an aluminum alloy.
    [0005]
    Manufacturing device according to claim 1, characterized by the fact that it comprises a first retaining means (42) to exert a holding force along the geometric axis in the length direction (X) on the counterflanges (32) towards the exterior of the device, and a second retention means (44) to exert a radial retention force on the counter flanges (32) aligned with the geometric axis in the length direction (X).
    [0006]
    Manufacturing device according to claim 5, characterized in that the first retaining means (42) includes screws (26) which pass through the side flanges (24) and counter flanges (32).
    [0007]
    7. Manufacturing device according to claim 5, characterized in that the second retaining means (44) includes stop blocks (43) provided on the stop flanges and locking screws which are installed on the stop blocks (43) and pressed against the side counter flanges (32) radially in the direction of the geometric axis in the direction of the length (X).
    [0008]
    8. Manufacturing device according to claim 1, characterized by the fact that the sides of the body (30) of the countermold (18) in contact with the counterflanges (32) are inclined in relation to the geometric axis in the direction of the length (X ).
    [0009]
    9. Manufacturing device according to claim 1, characterized by the fact that the counterflanges (32) are in several portions, the coincident surface (50) between two portions of a counterflange being inclined in relation to the geometric axis in the direction of the length (X).
    [0010]
    10. Method for manufacturing a turbomachine housing using the device as defined in claim 1, the device including a rigid mold (16) configured to contain the preform (P) made of woven fibers, the mold (16) comprising a cylindrical body (22) with a longitudinal axis (X) and side flanges (24), a countermold (18) comprising a cylindrical body (30) and side flanges (32), the counterflanges (32) being configured to be firmly attached to the side flanges (24) of the mold (16), the cylindrical body (22) of the mold (16) and the cylindrical body (30) of the countermold (18) being concentric, the preform (P) being intended to be positioned in a space bounded by the cylindrical body (22) of the mold (16) and the cylindrical body (30) of the countermold (18), a material of the body (22) of the mold (16) having a higher expansion coefficient than that of the cylindrical body (30) of the countermold (18), a means for injection o (36) under pressure of a resin within the space (28), the injection pressure being less than 0.4 MPa (4 bar), and a medium capable of producing a vacuum pressure within the space (28) by the mold (16) and the countermold (18), the method characterized by the fact that it comprises the steps of: a) manufacturing a preform made of woven fibers, b) installing the preform on the mold, c) installing the countermold over the preform, d) producing a vacuum pressure within the space between the mold and the countermold, e) injecting the resin under a pressure less than 0.4 MPa (4 bar), f) heating the device , g) polymerizing said resin, h) removing the countermold and the mold.
    [0011]
    11. Manufacturing method according to claim 10, characterized by the fact that step a) and step b) are simultaneous, the preform being produced directly on the mold.
    [0012]
    12. Manufacturing method according to claim 10, characterized by the fact that it comprises still after step c) installing the countermold on the preform, applying retention forces between the mold and the countermold.
    [0013]
    13. Manufacturing method according to claim 12, characterized by the fact that the holding forces comprise axial forces on the counterflanges along the lengthwise outwardly geometric axis, and radial forces on the counterflanges in the direction of the interior.
    [0014]
    14. Method of manufacture according to claim 12, characterized by the fact that, after polymerization, the retention forces are loosened, and where the countermold and the mold are left in position.
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    同族专利:
    公开号 | 公开日
    CA2796807C|2017-10-24|
    US20130087955A1|2013-04-11|
    JP2013527815A|2013-07-04|
    FR2958875A1|2011-10-21|
    CN102858520A|2013-01-02|
    FR2958875B1|2017-07-07|
    BR112012026929A2|2016-07-12|
    WO2011131908A1|2011-10-27|
    US9399315B2|2016-07-26|
    JP5901611B2|2016-04-13|
    EP2560808A1|2013-02-27|
    RU2564340C2|2015-09-27|
    CA2796807A1|2011-10-27|
    RU2012149241A|2014-05-27|
    CN102858520B|2016-01-27|
    EP2560808B1|2016-11-30|
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    法律状态:
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-01-28| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-04-28| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-07-14| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/04/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1052999|2010-04-20|
    FR1052999A|FR2958875B1|2010-04-20|2010-04-20|DEVICE FOR MANUFACTURING A CASE OF COMPOSITE MATERIAL AND MANUFACTURING METHOD USING SUCH A DEVICE|
    PCT/FR2011/050908|WO2011131908A1|2010-04-20|2011-04-20|Device for manufacturing a casing made of a composite material and manufacturing method employing such a device|
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