• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for unclamping a cluster (30) of lost-model foundry metal parts (32), the part cluster being formed in a shell (1), in which at least one blade is displaced by means of a machine without contact with the bunch, so that the blade engages the shell, breaks it into a plurality of fragments, and detaches from the bunch at least a portion of the shell; machine for implementing the method.
    公开号:FR3031921A1
    申请号:FR1550595
    申请日:2015-01-27
    公开日:2016-07-29
    发明作者:Alain Grandin；Vincent Auffret；Re Jean-Claude Del；Arnaud Jean-Bart；Gabriel Saunier；Jean-Pierre Vincette
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The invention relates to the unhinging of clusters of lost-model foundry metal parts. BACKGROUND OF THE INVENTION The lost-model (or lost-wax) foundry process is a well-known foundry process used in particular for the manufacture of turbine blades, in particular of aeronautical turbines, in particular turbomachines. This process is described, for example, in WO2014 / 049223.
    [0002] During the implementation of this foundry process for the manufacture of a cluster of parts, we obtain a cluster of parts formed in a shell or shell. This shell is typically ceramic. It is here called indifferently carapace or shell mold.
    [0003] To finalize the manufacture of the parts it is therefore necessary to clear these: this operation is called the "shakeout". Traditionally, the stall is done by striking on the shell with a hammer so as to break it and detach from the bunch of pieces.
    [0004] However, this technique has two disadvantages: firstly, it is painful and tiring for the operators in charge of these operations; moreover, it can create mechanical stresses in foundry pieces. These mechanical stresses may, during the subsequent heat treatment, result in the appearance of metallurgical defects called 'recrystallized grains'. These recrystallized metal grains are areas of weakness that reduce the life of the parts obtained and may lead to the scrapping thereof. PRESENTATION OF THE INVENTION The object of the invention is to propose a process for unclamping clusters of lost-model foundry metal parts in which the two disadvantages indicated above are eliminated or at least reduced. This object is achieved according to the invention by means of a method of shaking off a cluster of lost-model foundry metal parts in which, the cluster of parts being formed in a carapace, at least one blade is moved at least once. using a machine, without contact with the cluster, so that the blade engages the shell, breaks it into a plurality of fragments, and detaches from the cluster at least a portion of the shell. By blade is meant a tooling surface provided for engaging an outer body, particularly in this case the shell of the cluster. In what follows, to simplify the explanations the description mentions 'a blade'; It should be understood, however, that these explanations also cover the case where the method is implemented with a plurality of stall blades. In the method according to the invention presented above, preferably the displacement of the blade or blades for the shakeout of the cluster of parts occurs at a reduced speed; for example, at a speed less than 0.2 m / s, or even less than 0.05 m / s. This therefore reduces the impact between the blade and the shell and the risk of damage to the parts. Optionally, the invention can also be implemented without impact with the shell; that is to say that during the first contact between the blade (s) and the shell, the speed of the blades is almost zero.
    [0005] Conversely, in another embodiment the movement of the stall blade (s) can be done without stopping. The speed of movement of the blade or blades may for example be substantially constant. Advantageously, in the absence of high velocity shock between the blade and the shell, stress primers are not formed, where recrystallized grains are likely to appear during heat treatments applied to the parts. The method is implemented by means of a machine to ensure that the blade (s) move under the conditions (including no contact with the bunch at the parts) indicated. The machine advantageously avoids the tiring operation of shaking the clusters with the hammer. The efficiency of the process results from the fact that the shell formed around foundry pieces is a fragile piece, having a relatively low adhesion on the foundry pieces constituting the cluster. Also advantageously, even if the blade (s) of the tooling do not come into contact with it, far from it, with all the parts of the shell, their engagement with certain protruding parts or 'protuberances' of the carapace suffices to fracture it almost completely, and consequently to uncheck the castings.
    [0006] The projecting parts or protuberances at which the mold-shell is fractured may for example be formed around a heat shield provided in the shell mold. Such a heat shield serves to improve the cooling of the cluster during and after casting (An example of a heat shield is described in FR2874340). In particular, it serves to maintain the solidification front (solid / liquid interface during the cooling of the foundry cluster in the mold) as horizontal as possible. Since the blade (s) engage protuberances of the shell mold and only these (excluding the cluster itself), it is not necessary for the blade to approach close to the pieces to be unchecked. . On the contrary, to reduce as much as possible the mechanical stresses applied to the surface of the parts, it is even preferable that the displacement of the blade and the contact with the shell is made at a certain distance from the parts.
    [0007] Due to these relatively low requirements, advantageously the method according to the invention can often be implemented with one or more blades and / or displacements of this or these extremely simple blade (s). Thus, as previously indicated, the speed of the blade may be constant. Advantageously, in one embodiment of the method, the displacement of the at least one blade for unhitching the part bundle consists solely of a translational movement. This movement can in particular be carried out in a direction parallel to an axis of the cluster (the axis of flow, or the axis of symmetry or axisymmetry of the cluster). This axis is generally oriented vertically during the casting of the cluster. However, in other embodiments of the method, this movement of said at least one blade may also include non-parallel movement to an axis of the cluster, for example a rotational movement. It can thus possibly be constituted solely by a rotational movement. More generally, the displacement can be any, depending on the possibilities (number of degrees of freedom or number of axes) 5 of the machine on which the blade is fixed, and the geometry of the cluster. In one embodiment, the movement of said at least one blade comprises a passage between any pair of adjacent pieces of said pieces. Indeed, in the case of a pair of adjacent pieces, the passage of a blade between the two pieces of the pair of adjacent pieces makes it possible to ensure that the part of shell possibly connecting these pieces is fractured, which facilitates the separation between the carapace and the cluster. In particular, when the pieces of the cluster are distributed around a casting axis, the pieces are distributed over a circle around the casting axis. They are then adjacent two by two along the circumference of said circle. In one embodiment, said at least one blade is constituted by a plurality of blades, and when moving said plurality of blades, all said blades contact the shell at substantially the same time. This makes it easier to detach the shell from the cluster. In addition, the invention also relates to a method for manufacturing castings comprising the following steps: making a batch of lost model casting parts, the part bundle being formed in a carapace, and then unhooking at least one part of the carapace by the method of shakeout of foundry bunch defined previously. In addition, the invention also relates to a machine for shake-out the lost model foundry pieces, the part cluster being formed in a shell, the machine comprising a frame with means for rigidly attaching the shell to the frame. ; at least one blade; at least one actuator adapted to move said at least one blade relative to the frame, in a space provided for fixing the cluster.
    [0008] Preferably, the actuator is provided for moving said at least one blade relative to the frame in the space provided for fixing the cluster at a speed of less than 0.2 m / s, or even less at 0.05 m / s. The machine can be a relatively simple press.
    [0009] The actuator (s) may include an actuator adapted to move at least one blade for unhitching the part bundle only by a translation movement or only by a rotational movement. The actuator (s) may include in particular a jack.
    [0010] This jack can ensure the displacement of said at least one blade, in particular in translation. Said at least one blade is preferably non-rotating (it is neither a drill nor a mill). In one embodiment, said at least one blade is constituted by a plurality of blades integrated in a tool. These blades can in particular be rigidly fixed to each other within the tooling. They may in particular be oriented (extend) in directions substantially perpendicular to the direction of movement of the tooling. They can in particular be arranged in the same plane. They may in particular be elongated and be formed on tooling portions, for example in the form of fingers, directed in radial directions relative to a center of the tooling.
    [0011] The machine is provided for unhitching a cluster of pieces formed in a shell. As a result, the actuator or actuators are provided, depending on the configuration of the cluster, so as to move the blade or blades without shock with respect to the cluster and without contact with the blades so as to separate at least a portion of the shell of the bunch. As a result, the invention also relates to an assembly comprising a shake machine as defined above, and a cluster of lost model casting parts, the cluster of parts being formed in a carapace; the shakeout machine is adapted to allow the attachment 35 of said cluster on the frame; and said at least one actuator is adapted, when the cluster is fixed on the frame, to move said at least one blade 3031921 6 relative to the cluster and without contact with the cluster, so that said at least one blade engages the shell, breaks it into a plurality of fragments, and detaches from the cluster at least a portion of the shell.
    [0012] In one embodiment, in the vicinity of each part of the cluster, the carapace comprises at least one protuberance that said at least one blade engages during said displacement. This or these protuberance (s) are one or portions (s) of the shell containing no part of the cluster; thus, the blade (s) can engage the protuberance (s) without risk of striking the cluster. This or these protuberance (s) preferably extend to at least 6 mm, and preferably at least 8 mm, of the room in the vicinity of which it is located. In one embodiment, at least one of the protuberances 15 surrounds at least one of the parts of the cluster 360 ° in view along an axis of the cluster. This protuberance may in particular be a heat shield to improve the cooling of the cluster during the casting and cooling of the metal. In one embodiment, the protuberances are disposed substantially in one plane. In one embodiment, at least a portion of the protuberances are formed around or from a tray-shaped piece pierced with holes. This part is mostly designed to form a thermal screen. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood and its advantages will appear better on reading the detailed description which follows, of embodiments shown by way of non-limiting examples. The description refers to the accompanying drawings, in which: - Figure 1 shows schematically the steps of a method of manufacturing parts according to the invention by lost pattern foundry. FIG. 2 diagrammatically illustrates a wax core that can be used for carrying out the blade manufacturing process of FIG. 1; Figure 3 is a side view of a carapace mold and tooling used in the blade manufacturing process of Figure 1; FIG. 4 is a schematic perspective view of a shake machine according to a first embodiment of the invention, used for carrying out the method illustrated in FIGS. 1 to 3; - Figure 5A is a half-view in axial section of the shell mold and the tool shown in Figure 3; Figure 5B is a view of a detail of Figure 5A; FIG. 6 is a perspective view of the tooling used in the method illustrated in FIGS. 1 to 5B; FIG. 7A is a detail axial section of a shell mold containing a foundry cluster, and the tooling of a shake machine according to a second embodiment of the invention; Figure 7B is a cross-section of the tooling shown partially in Figure 7A; and FIG. 7C is a schematic axial section of the shake machine illustrated in FIGS. 7A and 7B.
    [0013] DETAILED DESCRIPTION OF THE INVENTION An example of a shakeout machine and method according to a first embodiment of the invention will now be presented in connection with FIGS. 1 to 5. This machine and this shake-out method will be presented in the context of a blade manufacturing process according to the invention. The blade manufacturing process presented is a lost model foundry process (Fig.1). The first step S1 of this method consists in manufacturing a model of cluster 21 in wax (FIG. 2), still called `non-permanent cluster '. A shell mold 1 is then produced around the wax cluster model in a manner known per se. The cluster model 21 has a plurality of blade patterns 22, connected by auxiliary portions 23. These auxiliary portions 23 have two additional disk-shaped pieces 14 made of wax. Each of these additional pieces 14 is in the form of a plate pierced with holes through which the blade patterns 22 pass.
    [0014] 303 1 9 2 1 8 The blade patterns 22 are all identical to each other. They are arranged in a circle axisymmetrically about an axis X, said casting axis. The X axis is disposed in the vertical direction during the foundry operation, when molten metal is poured into the shell mold 1 (operation discussed in more detail below). The blade models 22 are arranged parallel to the X axis. During the manufacture of the shell mold 1 (FIG. 2): the blade models 22 will serve to create molding cavities 7 for the molding of blades 32; The additional parts 14 will serve to build an upper heat shield 13 and a lower heat shield 13 '; - The other functional parts 23 will be used to develop including a casting cup 5, supply channels 8, stiffeners 20, and selectors 9.
    [0015] In a second step S2, the shell mold 1 is manufactured from the wax cluster 21 (this step is described in more detail in the document WO2014 / 049223). When making the shell, two additional parts of shell are obtained directly from the additional pieces 14 added to the cluster model 21.
    [0016] The last operation of step S2 is to remove the wax from the bunch model from the mold. This removal of the wax is achieved by wearing the shell mold in an autoclave mold (or other) at a temperature above the melting temperature of the wax. Following the wax removal operation, the additional carapace portions define cavities, referred to herein as 'additional cavities'. Two modes of implementation can be envisaged: either these additional cavities are in communication with the main cavity comprising the supply shaft connected to the cavities formed by the blade models 22 (before the removal of the wax), or these additional cavities are without communication with the main cavity. In a third step S3, the blade cluster 32 is formed in the shell mold 1 by casting molten metal into the shell mold 1. The casting result differs depending on whether or not the additional cavities 35 are connected to the mold. main cavity: In a first embodiment, the additional cavities are not in communication with the main cavity; the communication between these cavities and the main cavity has for example been deliberately blocked. These cavities then remain empty during casting and do not fill with metal. In a second embodiment, the additional cavities are in communication with the main cavity. They fill up then during the casting. In a fourth step S4, after the cooling and solidification of the metal in the shell mold 1, the cluster 30 is unchecked from the shell mold 1. In both embodiments, the shakeout consists in breaking up the shell by acting on additional shell parts. During this step, contact with the solidified metal should be avoided. Finally, in a fifth step S5 each of the blades 32 is separated from the rest of the cluster 30 and finished by finishing processes, for example machining processes. The invention particularly relates to the shakeout method implemented in the fourth step S4 indicated above. This stalling process is implemented by means of a shaking machine 40 (FIG. 4). This machine 40 comprises a frame or structure 42, a tooling 50 and an actuator 46. The frame 42 comprises fixing lugs or pins 44 (of the valet type), which make it possible to rigidly fix the shell mold 1 containing the cluster of blades 30 on a perforated plate 41 of the frame 42. The perforated portions of this plate, which serve to evacuate the fragments of the shell mold during the shake-out operation, are not shown.
    [0017] The pins 44 make it possible to fix the shell mold 1 so that the axis of symmetry (X) of this mold is oriented in the vertical direction. The actuator 46 is a linear jack. It is arranged to move the tooling 50 vertically in the downward direction along the axis X of the shell mold 1.
    [0018] The tooling 50 (FIG. 6) has a cage shape, with an upper disc 54, and a lower disc 52 fixed to the disc 54 by four vertical metal bars 56. The tooling 50 is attached to the disc 54. the output shaft 48 of the cylinder 46 by a sleeve 58 fixed on the outer upper surface of the disk 54, and in which the end of the shaft 48 is fixed. The upper disk 54 is therefore the driven portion of the tooling 50. The lower disk 52 is the working part of the tooling 50, namely the part that includes the blade 64 which engages the shell mold 1 10 to allow the shaving of the blade cluster 30. The disk 52 comprises in its central part a wide opening 60 of generally circular shape (Fig.6). On the periphery of this opening 60 are provided shaking fingers 62. These fingers are disc portions which extend from the peripheral ring 61 15 of the disk 52 in a radial direction reentrant towards the axis X of the machine 40. The lower surface of the disk 52 (under the fingers 62 and under the peripheral ring 61) constitutes the blade 64. This blade 64 is provided to engage the shell mold 1, when the cylinder 46 20 moves the tool 50 to the bottom (arrows A, Fig.3). The jack 46 is provided to move the tool 50 - and therefore the blade 64 - in translation relative to the frame at a constant speed of less than 0.2 m / s. The choice of a rather low speed makes it possible to avoid creating too large stress accumulations on the casting cluster when the blades are unstuck, and thus to avoid creating mechanical stresses capable of generating recrystallized grains during the heat treatment. In addition, the shaking machine 40 is designed such that during the downward movement of the tooling 50, the jack 46 moves the blade 64 (and more generally, the tooling 50) without contact with the cluster 30, especially without contact with the blades. For this purpose, the disk 52 is arranged so that the blade cluster 30 can pass without contact in its opening 60. The shaking machine 40 is further designed so that during the downward movement of the tooling 50, the blade 64 engages various parts of the shell mold 1, said protuberances, and detaches from the cluster 30 the greater part of the carapace. In the example presented, these protuberances are constituted by the additional parts of shell forming the heat shields 13 and 13 '. It is therefore understood that the disc 52 is provided to come into contact with the shell mold 1 at the protuberances (the heat shields 13 and 13 '). However, the disk 52 (and thus the blade 64) must not come into contact with the (metallic) cluster 30.
    [0019] Particular care must be taken in the contact between disk 52 and the protuberances. The protuberances are constituted by the additional parts of the shell, that is to say the heat shields 13 and 13 '. According to the embodiment, these additional parts are empty, or filled or partially filled with metal: In the first embodiment of the process mentioned above, the protuberances are empty. In this case, so that the disk 52 can descend without coming into contact with the cluster 30, it is sufficient that the disk 52 engages or interferes with the additional part of the shell, while maintaining a sufficient safety distance with respect to FIG. The disk 52 may in this case come into extensive contact with the additional parts of the shell (heat shields 13 and 13 '). In the second embodiment of the process mentioned above, illustrated by FIG. 5B, the protuberances or heat shields 13, 13 'are partially or completely filled with metal.
    [0020] In this embodiment, the zone of radial interference between the disk 52 and the heat shield 13 can extend only over a short distance d1 between the disk 52 and the shell mold 1. The trajectory of the disk 52 is provided to allow in no case a contact between the disk and the cluster 30; for this purpose, it is provided that a safety distance d2 at all times separates the disc 52 from the cluster 30. Furthermore, the shape of the disc 52 is provided so that the contact between the latter and the mold This implies in particular that the disk 52 is arranged inversely so as not to come into contact with the parts of the mold 1 situated above the screen 13, as shown in FIG. in particular the upper projections 38 of the shell mold 1 (FIG. 5B).
    [0021] 303 1 9 2 1 12 The screen 13 constitutes a 'protrusion' that the blade 64 engages during the movement of the tooling 50 according to the invention; 38. Advantageously, since the heat shield 13 is located at a certain distance from the vanes, the mechanical stresses applied to the blades during the contact between the blades 64 and the shell mold are relatively small. and do not create areas that can create recrystallized grains.
    [0022] When the tooling 50 descends under the action of the jack 46, the disc 52 comes into contact with the shell mold 1. The blade 64 then applies to the surface of the screen 13 (as protuberance) a force which tends to split the ceramic of the carapace into fragments; the rupture lines propagate and extend from the protuberance to the rest of the shell. Also, when the descent of the tool 50 continues, it hits the mold-shell 1 (moderate speed) and continues its descent movement by exerting a force on the mold-shell. The shell mold 1, which is fragile, breaks into a large number of fragments; under the effect of gravity, most of these fragments are detached from the cluster 30 and fall. The bulk of the shake-out of the cluster is thus achieved in a single simple and fast operation. After striking the heat shield 13 constituting an upper protrusion, continuing its descent the blade 64 strikes the heat shield 13 ', which constitutes a lower protuberance. It then breaks the remaining parts of the carapace mold and thus completes the stall of it (except for some remaining parts eventually). The tooling 50 presented above has the advantage of being implemented by a simple translational movement. This is made possible by the fact that the shape of the shell mold 1 allows the passage of the tool when it descends in the vertical direction (X axis). However, a more complex shakeout machine, including in particular a different shake tooling, may be necessary when the shape of the shell mold does not allow the shakeout of the cluster by moving a tool by a simple translational movement.
    [0023] An example of such a situation is illustrated by FIGS. 7A, 7B and 7C. In the case shown, the vanes of a cluster 130 which must be unchecked from a shell mold 101 have protrusions 138 very prominent. These projections 138 are incompatible with tooling down vertically without hitting the shell mold 101 at the right of these protrusions, but by engaging the heat shield 113 (Fig.7A). It is therefore necessary in this case that the tool moves in a more complex motion than a simple vertical translation. This movement can be performed by means of the machine 140 shown in FIGS. 7B and 7C, which constitutes another embodiment of the invention. The parts of the machine 140 or mold 101 which have a structure and / or a function identical or similar to that (s) of the corresponding part of the machine 40 or the mold 1 bear the reference of this corresponding part, increased by 100. The stripping machine 140 comprises a frame 142 with a perforated plate 141 on which the shell mold 101 can be fixed, a tool 150, and actuators 146. The tool 150 is not constituted in a single rigid part as The tooling 50, but in four parts can of course be made in any number of parts, other than four). Each of these four parts comprises a plate 152 in the general shape of disk quarter, these four plates being identical. In order to displace the trays 152 and hence, to uncheck the blade cluster, the shake machine 140 has four rotary actuators 146 which are identical to each other. Each actuator 146 is a rotary jack adapted to rotate one of the trays 152 about a horizontal axis. For this purpose, each of the trays 152 comprises a flange portion 158 provided to allow the attachment of the plate 152 to one of the actuators 146. During the shaking operation of the blade cluster 130 relative to the shell mold 101, the actuators 146 drive the four trays 152 in rotation simultaneously. During this movement, the trays 152 engage the shell mold 101 at the upper heat shield 113 thereof, fragment the mold 101 into a large number of pieces, and thus separate a large number of pieces. part of the mold 101 of the blade cluster. In another embodiment, the different parts of the tooling can naturally be moved not simultaneously, but in any conceivable sequence, for example one after the other, or successively in diametrically opposed pairs, etc. The movement of the trays 152 is a rotational movement, carried out in such a way that they do not come into contact with the cluster 130. This rotational movement makes it possible to bring the ends of the fingers 162 of the tool 150 closer together. X axis of the carapace mold 101 (arrows in Figure 7B). With this, the fingers 162 pass between each pair of adjacent blades, and thus ensure that the shell mold 101 is fractured between all pairs of adjacent blades. By thus fragmenting the shell mold 101 in at least as many portions as there are blades 132, the tooling 150 thus ensures the unhinging of a very large portion of the shell mold 101. Each cylinder 146 is controlled by such so that it moves the end of the plate 152 that it drives, that is to say the end of the finger 162, at a substantially constant speed, less than 0.2 m / s.
    [0024] Naturally, a machine or stall method according to the invention can be made according to many other embodiments than those presented above. Numerous possibilities exist as regards the arrangement of the stall blades and the tooling that supports them as well as the kinetics or the path of movement of the slat or slats.
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. A method of disengaging a cluster (30,130) of lost-model foundry metal parts (32,132), the part array 5 being formed in a shell (1,101), wherein at least one blade (64) is moved to using a machine (40,140) without contact with the cluster, so that the blade engages the shell, breaks it into a plurality of fragments, and detaches from the cluster at least a portion of the shell. 10
    [0002]
    The stalling method of claim 1, wherein said moving of said at least one blade (64) for unhitching of the part bundle occurs at a speed of less than 0.2 m / s. 15
    [0003]
    3. Unclamping method according to claim 1 or 2, wherein the displacement of said at least one blade (64) for the shakeout of the part array consists solely of a translational movement or only by a rotational movement. 20
    [0004]
    The stall method of any one of claims 1 to 3, wherein the movement of said at least one blade (64) comprises a passage between any pair of adjacent pieces of said pieces (32,132). 25
    [0005]
    5. A method of stalling according to any one of claims 1 to 4, wherein said at least one blade is constituted by a plurality of blades, and when moving said plurality of blades, all said blades come into contact with the carapace substantially at the same time. 30
    [0006]
    6. A method of manufacturing castings comprising the steps of: producing a cluster (30,130) of lost pattern foundry pieces (32,132), the part array being formed in a shell (1,101), and then unblocking a portion of the shell by the method of any one of claims 1 to 5. 303 1 9 2 1 16
    [0007]
    A machine (40,140) for clipping (30,130) a lost pattern casting, wherein the cluster of parts is formed in a shell (1,101), the machine comprising: a frame (42,142) with means (44) for rigid attachment of the shell to the frame; at least one blade (64); at least one actuator (46, 146) adapted to move said at least one blade relative to the frame, in a space provided for fixing the cluster.
    [0008]
    8. machine (40,140) clutch (30,130) pieces according to claim 7, wherein said at least one actuator is adapted to move said at least one blade relative to the frame at a speed less than 0.2 m / s .
    [0009]
    The machine (40,140) of a cluster (30,130) of parts according to claim 7 or 8, wherein said at least one actuator includes an actuator adapted to move at least one blade for unhooking the part array only by a translation movement or only by a rotational movement
    [0010]
    An assembly comprising a stall machine (40, 140) according to any one of claims 7 to 9, and a cluster (30) of lost model castings, the part array being formed in a shell (1, 101); the shakeout machine is adapted to allow the attachment of said cluster on the frame (42,142); and said at least one actuator is adapted, when the cluster is attached to the frame (42,142), to move said at least one blade (64) relative to the cluster and without contact with the cluster (30,130) so that the The blade engages the shell, breaks it into a plurality of fragments, and detaches at least a portion of the shell from the cluster.
    [0011]
    11. The assembly of claim 10, wherein in the vicinity of each piece (32) of the cluster (30,130), the shell (1,101) comprises at least one protrusion (13,113) that said at least one blade engages during said movement. 303 192 1 17
    [0012]
    12. The assembly of claim 11, wherein said protuberances (13,113) are disposed substantially in a plane. 5
    [0013]
    An assembly according to claim 11 or 12, wherein at least a portion of said protuberances (13,113) are formed around or from a plate-shaped piece (14) pierced with holes.
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    同族专利:
    公开号 | 公开日
    US10632531B2|2020-04-28|
    FR3031921B1|2017-02-10|
    CN107427910A|2017-12-01|
    EP3250336B1|2019-03-06|
    EP3250336A1|2017-12-06|
    CN107427910B|2019-12-06|
    WO2016120538A1|2016-08-04|
    US20180178280A1|2018-06-28|
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    法律状态:
    2016-01-11| PLFP| Fee payment|Year of fee payment: 2 |
    2016-07-29| PLSC| Publication of the preliminary search report|Effective date: 20160729 |
    2017-01-03| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-10| CD| Change of name or company name|Owner name: SNECMA, FR Effective date: 20170713 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 4 |
    2019-12-19| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-17| PLFP| Fee payment|Year of fee payment: 7 |
    2021-12-15| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550595A|FR3031921B1|2015-01-27|2015-01-27|METHOD AND DISCHARGE MACHINE FOR CLUSTERING LONG-MODEL FOUNDRY PARTS|FR1550595A| FR3031921B1|2015-01-27|2015-01-27|METHOD AND DISCHARGE MACHINE FOR CLUSTERING LONG-MODEL FOUNDRY PARTS|
    US15/546,545| US10632531B2|2015-01-27|2016-01-11|Knockout method and machine for a cluster of lost-pattern castings|
    PCT/FR2016/050039| WO2016120538A1|2015-01-27|2016-01-11|Shake-out method and machine for a sprue of lost-pattern castings|
    EP16703566.6A| EP3250336B1|2015-01-27|2016-01-11|Shake-out method and machine for a sprue of lost-pattern castings|
    CN201680012704.8A| CN107427910B|2015-01-27|2016-01-11|Demolding method and machine for cluster of lost foam castings|
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