EP4463274A1 - Ensemble pour la réalisation d'un moulage en matériau éliminable d'une aube de turbomachine - Google Patents
Ensemble pour la réalisation d'un moulage en matériau éliminable d'une aube de turbomachineInfo
- Publication number
- EP4463274A1 EP4463274A1 EP23703834.4A EP23703834A EP4463274A1 EP 4463274 A1 EP4463274 A1 EP 4463274A1 EP 23703834 A EP23703834 A EP 23703834A EP 4463274 A1 EP4463274 A1 EP 4463274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core element
- holding member
- face
- core
- fulcrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/24—Accessories for locating and holding cores or inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
Definitions
- the present disclosure relates to the field of turbomachine blades, that in particular of blades obtained by casting a molten alloy in a mold according to the technique of foundry in removable material, such as for example lost wax.
- the lost-wax casting technique consists first of all in producing a model in wax, or in any other material that can be easily removed later, of the part to be produced; this model includes an internal part forming a ceramic core which represents the cavities that one wishes to see appear inside the blading.
- the wax model is then dipped several times in slips made of a suspension of ceramic particles to make, by operations called stuccoing and drying, a shell mould.
- the carapace mold is then waxed, which is an operation by which the wax or the material constituting the original model is removed from the carapace. After this elimination, a ceramic mold is obtained, the cavity of which reproduces all the shapes of the blade and which still contains the ceramic core intended to generate the internal cavities thereof. The mold then undergoes a high temperature heat treatment or “baking” which gives it the necessary mechanical properties.
- the shell mold is then ready for the manufacture of the metal part by casting.
- the next step consists in pouring a molten metal, which fills the voids between the inner wall of the shell mold and the core, then in solidifying it.
- solidification techniques there are currently several solidification techniques and several casting techniques, depending on the nature of the alloy and the expected properties of the part resulting from the casting. It can be directed solidification with columnar structure (DS), directed solidification with monocrystalline structure (SX) or equiaxed solidification (EX).
- a tool or wax injection mold is used, in which the core is placed and then the liquid wax is injected through a channel provided for this purpose.
- the solution adopted consists in producing the core in two parts, in particular because of the complexity of the cavities forming the cooling circuit and the difficulties encountered when unmolding the core of its injection mold. But due to the too small dimensions of the core parts, and their complex geometry, it is impossible to make a connection between these core parts, for example by gluing, so as to then position the core with its assembled parts in a tool. injection molding comprising a classic six-point isostatic positioning system.
- a difficulty encountered is twofold because it consists on the one hand of very precisely positioning the different parts of the core in the wax injection mold and on the other hand to position the different parts of the core relative to each other.
- the two parts cannot each include their own classic isostatic positioning system with six points of support in relation to the mould, because this would double the number of supports to be integrated into the wax injection mould, which terms of mold size is not an option.
- the two parts of the core being punctually entangled, certain points of isostatism cannot be placed in the wax injection mould. Consequently, the simple positioning of the cores relative to the mold cannot allow complete positioning of the cores relative to each other.
- the object of the invention is in particular to provide a simple, effective and economical solution to the problems of the prior art described above.
- the present disclosure proposes an assembly for producing a molding in removable material of a turbomachine blade comprising a mold for injection of said removable material in which a first core element and a second core element are capable of being mounted in a predetermined molding position, the first and second core elements extending in a first direction, the mold comprising:
- first holding member for holding the cores in position in the injection mold, at least one first holding member extending from the first face of the mold in the second direction and at least partially passing through the first and the second core elements, the first holding member comprising a first bearing point on the first core element and a second bearing point on the second core element.
- the assembly may include the following characteristics, taken alone or in combination:
- the first core element and the second core element are shaped in such a way that the first bearing point of the first holding member provides blocking of the first core element in a first direction of a third direction perpendicular to the first and second direction and the second fulcrum of the first holding member ensures locking of the second core element in a second direction of the third direction, opposite to the first direction;
- a second holding member extends from the first molding face in the second direction, the second holding member comprising a first point of support on the first core element and a second point of support on the second element of core, said first fulcrum and second fulcrum of the second holding member being distinct from the first fulcrum and second fulcrum of the first holding member;
- the first core element and the second core element are shaped so that the first fulcrum of the second holding member locks the first core element in the first direction of a third direction perpendicular to the first and in the second direction and the second fulcrum of the second holding member provides locking of the second core element in a second direction of the third direction, opposite to the first direction;
- the second holding member comprises a spacing means between the first fulcrum of the second holding member and the second fulcrum of the second holding member, the spacing means guaranteeing, during the production of the molding in removable material, a spacing of a constant distance between said support points in the third direction;
- the first holding member comprises a spacing means between the first fulcrum of the first holding member and the second fulcrum of the first holding member, the spacing means guaranteeing, during the production of the molding in removable material, a spacing of a constant distance between said support points according to at least one of the first direction, the second direction or the third direction;
- the first holding member and/or the second holding member is movable between a holding position for at least one core element and a retracted position, the holding member comprising a retraction mechanism for positioning the holding member in the holding position or in the retracted position;
- the first holding member and/or the second holding member comprises an axis of rotation and an eccentric head relative to the axis of rotation and cooperating with the first core element and the second core element.
- a process for producing a molding in removable material of a turbine engine blade comprising:
- the mold comprising:
- the method comprising the step: positioning the first element of the core and the second core element on the first molding face so that the first holding member at least partially passes through the first and the second core elements and comprises a first point of support on the first core element and a second fulcrum on the second core element.
- the method may further comprise: the step: positioning the first core element and the second core element on the first molding face so that the second holding member comprises a first point of support on the first core element and a second bearing point on the second core element, the mold further comprising a second holding member extending from the first molding face in the second direction.
- FIG. 1 shows a perspective view of a first and a second core element placed on a first face of an injection mold of a removable material.
- FIG. 2 shows the view of Figure 1, without the first and the second core element, the first face of the injection mold comprising holding members with support points for holding the leading edge cores and trailing edge.
- FIG. 3 shows a view of the leading edge core from its extrados face, on which the support points are schematized.
- FIG. 4 shows a view of the trailing edge core from its extrados face, on which the support points are schematized.
- FIG. 5 is a sectional view of Figure 1 along the axis A-A.
- FIG. 6 is a sectional view of Figure 1 along the B-B axis.
- FIG. 7 is a sectional view of Figure 1 along the B-B axis, illustrating a first embodiment of a holding member.
- FIG. 8 is a sectional view of Figure 1 along the B-B axis, illustrating a second embodiment of a holding member.
- FIG. 9 is a top view of the example shown in Figure 8.
- upstream and downstream are subsequently defined with respect to the direction of gas flow through a turbomachine, indicated by the arrow F in FIG.
- Figure 1 illustrates the arrangement of the core elements in an injection mold, only a first molding face 20 being illustrated.
- Figure 1 illustrates that the core has a first core element and a second core element, hereinafter referred to as the leading edge core 22 and the trailing edge core 21 .
- the cores 21, 22 extend in three perpendicular directions in pairs, a first direction Z, hereinafter referred to as the longitudinal direction Z corresponding on the final blade to the longitudinal direction connecting the root to the tip of the blade , a second direction Y, hereinafter referred to as the transverse direction Y, crossing the intrados and extrados faces of the blade, and a third direction X, hereinafter the axial direction X corresponding on the final blade to the direction upstream/downstream (arrow F).
- a first direction Z hereinafter referred to as the longitudinal direction Z corresponding on the final blade to the longitudinal direction connecting the root to the tip of the blade
- a second direction Y hereinafter referred to as the transverse direction Y, crossing the intrados and extrados faces of the blade
- a third direction X hereinafter the axial direction X corresponding on the final blade to the direction upstream/downstream (arrow F).
- FIG. 1 only the underside face of the leading edge core 23a and the underside face of
- the extrados face of the leading edge core 24a and the extrados face of the trailing edge core 24f, visible for each core in Figures 3 and 4, is arranged facing the first molding face 20.
- the leading edge 22 and trailing edge 21 cores each comprise a head respectively 25a, 25f and a foot 26a, 26f respectively, the head 25a, 25f being arranged at the opposite end of the foot 26a, 26f, in the longitudinal direction Z.
- each of the cores comprises a cutout 27a, 27f, i.e. that is to say a portion without material, which extends at least partly perpendicular to the longitudinal direction Z, in the axial direction X.
- cutouts also extend from the intrados faces 23a, 23f towards the extrados faces 24a, 24f. These cutouts are provided to form in the final blade a bottom wall of the blade tub.
- the cutout 27a of the leading edge core 22 is delimited by an upper cutout wall 271a and by a lower cutout wall 272a.
- the cutout 27a of the leading edge core also extends over the entire width of the core, in the axial direction X.
- the cutout 27f of the trailing edge core 21 is delimited by an upper cutout wall 271f and by a lower cutout wall 272f.
- the cutout of the trailing edge core 27f extends for its part over only part of the width of the core, in the axial direction X.
- the cutout of the trailing edge core 27f extends from the edge upstream 28 of the trailing edge core and ends in a longitudinal cut-out portion 29 which extends longitudinally in the longitudinal direction Z in the material of the core, and therefore without passing through the core as far as its downstream edge 30.
- the feet 26a, 26f further comprise a free end 31a, 31f, corresponding to a non-functional area of the core.
- the free ends 31a, 31f can overlap, at least partially.
- the free end 31f of the trailing edge core may include a tab 33f.
- the free end 31a of the leading edge core may include an indentation 33a.
- the cavity 33a is provided to receive the tab 33f. There is thus a complementarity of form between the imprint 33a and the tab 33f. This overlap can make it possible to staple the two cores together in order to obtain a fixing of the cores between them, for example by piercing the overlapping portion of material then by inserting an aluminum rod therein.
- the trailing edge core 21 further comprises a notch 32 on its downstream edge 30.
- the notch 32 is arranged in the head zone 25f.
- the notch 32 is substantially U-shaped, oriented so that the opening of the concavity of the U is oriented in the axial direction X.
- FIG. 2 illustrates the first molding face 20, devoid of the cores 21, 22.
- the first molding face comprises holding members P1a, P1f, P2a, P2f, P3a, P3f, P4, P5, P6a , P6f for holding the cores in position in the injection mould.
- Each holding member holds in position, in one of the three directions X, Y or Z, the leading edge core 22 or the trailing edge core 21, or the two cores 21, 22.
- the leading edge core 22 is placed in the injection mold by a first positioning reference
- the trailing edge core 21 is placed in the mold injection by a second positioning reference.
- the first positioning frame of reference is formed by holding members P1a, P2a, P3a, P4, P5 and P6a.
- the second positioning reference frame is formed by holding members P1f, P2f, P3f, P4, P5 and P6f (or alternatively by a point P6f'). Consequently, the injection mold comprises two different repositories, each intended for a different core, the holding members P4 and P5 being holding members common to the two cores.
- the holding members P1a, P1f, P2a, P2f, P3a and P3f allow the holding in position along the transverse direction Y, of the leading edge core 22 or of the trailing edge core 21, or of the two cores 21,22.
- the holding members P1a, P2a, and P3a are provided for holding in position in the transverse direction Y of the leading edge core 22.
- the holding members P1f, P2f, and P3f are provided for holding in position along the transverse direction Y of the trailing edge core 21.
- Each of the holding members P1a, P1f, P2a, P2f, P3a and P3f extends from the first molding face 20, in the transverse direction Y. Each of these members is in bearing against one of the two cores, which prevents movement of the cores in the transverse direction Y.
- the holding members P1a, P2a, P2f and P1f are arranged in the foot zone 26a, 26f of the cores. These retaining members P1a, P2a, P2f and P1f are aligned in the axial direction X.
- the retaining members P1a, P2a, P2f and P1f are arranged close to the free end 31a, 31f of the cores. In other words, the holding members P1a, P2a, P2f and P1f are arranged outside the free end of the cores, but in the base area 26a, 26f of the cores.
- the holding members P1a, P2a, P2f and P1f end in a support surface for the respective core, each of these support surfaces being substantially planar.
- each of these bearing surfaces is substantially perpendicular to the transverse direction Y. These surfaces are also located outside the functional zone.
- the P3a and P3f holding members are arranged in the head zone 26a, 26f of the cores.
- the retaining member P3a and the retaining member P3f are offset in the longitudinal direction Z. In other words, the retaining members P3a and P3f are not aligned in the axial direction X.
- the retaining members P3a and P3f terminate in a bearing surface for the respective core, each of these bearing surfaces following the shape of the contact zone of the core. In other words, for optimal support, the bearing surfaces of the holding members P3a and P3f match the shape of the surface of the zone of the core with which they are in contact.
- the second molding face may comprise holding members similar to the holding members described above, so as to lock the cores in position in the transverse direction Y.
- the first mold face 20 may further comprise the holding members P6a and P6f.
- the holding members P6a and P6f allow the holding in position along the longitudinal direction Z, for example of the leading edge core 22 or of the trailing edge core 21 . Each of these members bears respectively against the leading edge core 22 and the trailing edge core 21, which prevents movement of the cores in the longitudinal direction Z.
- the holding member P6a is provided for example for holding in position along the longitudinal direction Z of the leading edge core 22.
- the holding member P6a extends from the first molding face, in the transverse direction Y.
- the holding member P6a bears against the lower wall of the cutout 272a of the leading edge core 22.
- the holding member P6f is provided for example for holding in position in the longitudinal direction Z of the trailing edge core 21 .
- the retaining member P6f extends from the first molding face, in the axial direction X, in the direction from downstream to upstream.
- the P6f holding member bears in the notch 32 of the downstream edge 30 of the trailing edge core 21 .
- the holding member P6'f is provided for holding in position along the longitudinal direction Z of the trailing edge core 21.
- the holding member P6'f extends from the first molding face 20, in the direction transverse Y.
- the retaining member P6'f rests against the lower cutting wall 272f of the trailing edge core 21 .
- the holding members P6a and P6'f are arranged so that the cutouts of the two cores are substantially aligned in the axial direction X.
- the retaining member P6 makes it possible to distribute the expansion of the trailing edge core 21 in the longitudinal direction Z, towards the head 25f and towards the foot 26f, avoiding to have too great a difference in length with the leading edge core 22, in particular in the event of very different expansions between the two cores.
- the retaining member P6'f is advantageously used so as to control the dimensions of a so-called bath bottom wall present in the final blade.
- the tub bottom wall is materialized by the cutouts 27a, 27f of the cores, which form a portion filled with material in the final blade.
- the tub bottom is substantially flat, and extends in the transverse direction Y and the axial direction X.
- the bottom wall of the bath separates the bottom of the bath into two parts, arranged at different levels in the longitudinal direction Z.
- the wall 26 extends in the longitudinal direction Z, from the bottom of the tub 24.
- the height of the low wall, in the longitudinal direction Z is a characteristic that must be controlled in order to meet the aerodynamic performance of the blade. It is in fact desirable that the height of the low wall be as small as possible, so as to avoid as far as possible too great a difference in level between the parts of the bottom of the bathtub.
- the retaining member P6'f associated with the retaining member P6a, places the cutouts 27a and 27f of the cores in the same plane, which makes it possible to obtain two bottom parts of the tub substantially in the same plane perpendicular to the longitudinal direction Z.
- the first molding face further comprises the holding members P4 and P5.
- the holding members P4 and P5 allow the holding in position along the axial direction X of the leading edge core 22 or of the trailing edge core 21, or of the two cores 21,22.
- the holding members P4 and P5 are holding members common to the two leading edge 22 and trailing edge 21 cores.
- the holding members P4 and P5 for this purpose each comprise a first bearing point on the leading edge core and a second bearing point on the trailing edge core.
- the holding members P4 and P5 together block the rotation of the cores around the transverse axis Y.
- Each of the holding members P4 and P5 extends from the first molding face, in the transverse direction Y.
- Figures 7, 8 illustrate embodiments of a holding member, in a sectional view along the axial direction X.
- Figure 9 is a top view of the example of Figure 8.
- the holding member comprises a base 30 and a head 31 .
- the base 30 is cylindrical.
- the base 30 is also arranged in the mold, and can pivot around its axis of rotation R, coinciding with its axis of revolution.
- the head 31 is a rod which extends in the transverse direction Y, from the base 30. In the example illustrated in Figure 7, the head 31 is aligned with the axis of rotation R.
- the rotation of the base 30 the holding member around the axis of rotation R does not lead to an offset of the head 31, c that is to say translational movement in the plane defined by the transverse Y and longitudinal Z directions.
- the head 31 is not aligned with the axis of rotation R of the base 30. Consequently, the head 31 has, in this example, an eccentric function: the head 31 moves in a plane defined by the transverse Y and longitudinal Z directions.
- This example advantageously makes it possible to move the leading edge core 22 and the trailing edge core 21, to adjust their position in the mold, the leading edge cores trailing edge 21 cooperating with the holding member, as detailed later in the presentation.
- the P4 holding member (or first holding member) can be arranged in the head zone 25a, 25f.
- the holding member P5 (or second holding member) can be arranged in the foot zone 26a, 26f, at the junction with the free end 31a, 31f.
- the holding members P4 and P5 can also be aligned in the longitudinal direction Z.
- the holding members P4 and P5 are moreover arranged in a non-functional zone, that is to say outside the room.
- the P4 holding member is visible in Figure 5, corresponding to a sectional view along the axis A-A of Figure 1. It can be seen that the P4 holding member comprises a first point of support on the leading edge core P4a, and a second support point on the trailing edge core P4f.
- the first fulcrum P4a ensures blocking of the leading edge core 22 in a direction F1 going from upstream to downstream.
- the second support point P4f ensures blocking of the trailing edge core in a direction F2 going from downstream to upstream, that is to say a direction opposite to the direction of blocking of the edge core. of attack.
- the P4 holding member can also be through.
- the retaining member P4 extends from the first molding face 20 to the lower face of the trailing edge core 23f, respectively crossing the upper face of the edge core 24a, the intrados face of the leading edge core 23a and the extrados face of the trailing edge core 24f.
- the P5 holding member is visible in Figure 6, corresponding to a sectional view along the axis BB of Figure 1. It can be seen that the P5 holding member comprises a first point of support on the P5a leading edge core, and a second fulcrum on the P5f trailing edge core.
- the first fulcrum of the holding member P5a ensures blocking of the leading edge core 22 in a direction F1 going from upstream to downstream.
- the second fulcrum of the retaining member P5f ensures blocking of the trailing edge core 21 in a direction F2 going from downstream to upstream, that is to say a direction opposite to the direction of blocking F1 of the leading edge core.
- the P5 holding member can also be through.
- the retaining member P5 extends from the first molding face 20 in the direction of the intrados face 23a, 23f of the trailing edge and leading edge cores, and beyond. , in the transverse direction Y, of the extrados face 24a, 24f of the cores.
- the retaining member P5 crosses, in the transverse direction Y, only an alignment defined by the extrados faces 24a, 24f of the two cores, without crossing the cores.
- the retaining member P5 is arranged between the two cores, and extends beyond their extrados face 24a, 24f, without however extending beyond their intrados face. 23a, 23f.
- the retaining member P5 can extend beyond their intrados face 23a, 23f.
- the P4 holding member and / or the P5 holding member can be movable between a holding position, and a retracted position.
- the holding position visible in Figures 4 and 5, which can also be called the extended position
- the holding member is in contact with at least one of the cores.
- the retracted position the holding member is set back relative to the cores, its length being less than its length in the holding position.
- the mobility of the holding member(s) makes it easy to unmold the part obtained. Indeed, when the holding member, in its deployed position, is arranged along an axis different from the stripping axis, its retracted position allows the holding member not to oppose the stripping.
- the holding member further comprises a retraction mechanism, providing mobility between the retracted position and the holding position.
- the P4 holding member and / or the P5 holding member may further comprise a spacing means D4, D5 between their first and second support points.
- the spacing means guaranteed spacing (or spacing) of a constant spacing distance between the first and second support points, the spacing distance being measured for example along the axial direction X. More specifically, the means spacing D4, D5 keeps the two cores apart from each other, without them being in contact, that is to say without the cores touching. Since the cores extend along the three directions of space, the spacing distance can be measured along the longitudinal direction Z or the transverse direction Y.
- a spacing means is for example materialized by the diameter of the holding member.
- the holding member may for example have a constant diameter over its entire length.
- the holding member may have a smaller diameter towards its free end, and a larger diameter towards its base (that is to say on the side of the first molding face).
- the P4 holding member and / or the P5 holding member may further comprise a means for adjusting the position of the cores in the first molding face.
- the adjustment means is an eccentric, which can be pivoted around the transverse direction Y to shift the two cores in the plane formed by the transverse and axial directions.
- the first molding face 20 may further comprise counter-supports, as illustrated in Figure 2. It can thus be seen that the first molding face 20 comprises for the edge core of attack 22, a first counter-support 41a, and a second counter-support 42a. For the trailing edge core 21, the first molding face 20 also comprises a first counter-support 41f, and a second counter-support 42f.
- the counter-supports participate in maintaining the cores in the mould, as well as in the contact of the cores with the support points. For example, as can be seen in FIG. 4, the first counter-support 41a of the leading edge core 22 presses the leading edge core against the retaining member P4.
- first counter-support 41 f of the trailing edge core 21 presses the trailing edge core 21 against the retaining member P4.
- the second counter-support 42a of the leading edge core 22 presses the leading edge core against the retaining member P5.
- first counter-support 41 f of the trailing edge core 21 presses the trailing edge core 21 against the retaining member P5.
- the first counter-supports 41a, 41f and respectively the second counter-supports 42a, 42f extend in the axial direction X.
- the first counter-supports 41a, 41 f and respectively the second counter-supports 42a, 42f can be aligned in the axial direction X with the respective holding members P4 and P5.
- the elements described above for the P4 holding member can be applied to the P5 holding member, and conversely the elements described above for the holding member P5 can be applied to the retaining member P4.
- the first holding member may be the holding member P5 and the second holding member may be the holding member P4.
- the first fulcrum and the second fulcrum of the first holding member P5 can be the points P5a and P5f respectively
- the first fulcrum and the second fulcrum of the second holding member P4 can be the points P4a and P4f respectively.
- a method for producing a molding in removable material of a turbine engine blade comprising:
- the first holding member has a first bearing point on a first bearing surface of a core element, the first bearing surface extending against the core, for the maintaining said core element in position in the second direction.
- the retaining member(s) P4, P5 at least partially passes through the leading edge cores
- the method may include: closing the mold by positioning the second molding face on the core elements, with at least one additional holding member.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2200251A FR3131701B1 (fr) | 2022-01-13 | 2022-01-13 | Ensemble pour la réalisation d’un moulage en matériau éliminable d’une aube de turbomachine |
| PCT/FR2023/050048 WO2023135395A1 (fr) | 2022-01-13 | 2023-01-13 | Ensemble pour la réalisation d'un moulage en matériau éliminable d'une aube de turbomachine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4463274A1 true EP4463274A1 (fr) | 2024-11-20 |
| EP4463274B1 EP4463274B1 (fr) | 2026-03-04 |
Family
ID=81648519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23703834.4A Active EP4463274B1 (fr) | 2022-01-13 | 2023-01-13 | Ensemble pour la réalisation d'un moulage en matériau éliminable d'une aube de turbomachine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12343790B2 (fr) |
| EP (1) | EP4463274B1 (fr) |
| CN (1) | CN118660773A (fr) |
| FR (1) | FR3131701B1 (fr) |
| WO (1) | WO2023135395A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4283835A (en) * | 1980-04-02 | 1981-08-18 | United Technologies Corporation | Cambered core positioning for injection molding |
| US4289191A (en) * | 1980-04-02 | 1981-09-15 | United Technologies Corporation | Injection molding thermoplastic patterns having ceramic cores |
| FR2874186B1 (fr) | 2004-08-12 | 2008-01-25 | Snecma Moteurs Sa | Procede de fabrication par moulage a cire perdue de pieces comportant au moins une cavite. |
| FR2875425B1 (fr) | 2004-09-21 | 2007-03-30 | Snecma Moteurs Sa | Procede de fabrication d'une aube de turbomachine, assemblage de noyaux pour la mise en oeuvre du procede. |
| CN212822530U (zh) * | 2020-08-19 | 2021-03-30 | 四川省简阳川田机械阀业有限公司 | 一种用于阀体铸造的型芯以及阀体蜡型成型模 |
-
2022
- 2022-01-13 FR FR2200251A patent/FR3131701B1/fr active Active
-
2023
- 2023-01-13 US US18/728,789 patent/US12343790B2/en active Active
- 2023-01-13 WO PCT/FR2023/050048 patent/WO2023135395A1/fr not_active Ceased
- 2023-01-13 CN CN202380020968.8A patent/CN118660773A/zh active Pending
- 2023-01-13 EP EP23703834.4A patent/EP4463274B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US12343790B2 (en) | 2025-07-01 |
| FR3131701B1 (fr) | 2024-05-17 |
| FR3131701A1 (fr) | 2023-07-14 |
| US20250083221A1 (en) | 2025-03-13 |
| WO2023135395A1 (fr) | 2023-07-20 |
| EP4463274B1 (fr) | 2026-03-04 |
| CN118660773A (zh) | 2024-09-17 |
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