• 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:
    The tire mold lining element comprises a body 12 delimiting a molding surface 14 intended to mold at least partially a running surface of the tire, at least one injection nozzle 26 disposed on the body and provided with at least one outlet port 26a, at least one supply channel extending inside the body and the injection nozzle being in communication with said outlet port, and at least one movable closure member 30 relative to the injection nozzle between a closed position and an open position of said outlet port. The body 12, the injection nozzle 26 and the closure member 30 are manufactured by the selective deposition and melting of stacked powder layers.
    公开号:FR3031472A1
    申请号:FR1550134
    申请日:2015-01-08
    公开日:2016-07-15
    发明作者:Romain Calvel；Thibault Boncompagne
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a packing element obtained by additive manufacturing based on powder and comprising means for the injection of a fluid or a solid. The packing element is intended to be used in a baking mold or vulcanization for a vehicle tire, and in particular in a mold of the sector type. The present invention also relates to a process for obtaining such a packing element. A sector mold mainly comprises two lateral shells each ensuring the molding of one of the lateral sidewalls of the tire, and a plurality of sectors providing the molding of the tread of said tire and movable radially between an open position and a position of closing the mold. The shells and the sectors define an interior space intended to be brought into contact with the blank of the unvulcanized tire. To mold the tread of the tire, the sectors of the mold comprise lining elements. "Trim member" means a portion of the mold which has a molding surface for molding at least a portion of the tread surface of the tread. It is possible to make a packing element by a powder-based additive manufacturing process by sintering or by melting grains of said powder with the aid of an energy beam. "Energy beam" means an electromagnetic radiation (for example a laser beam) or a particle beam (for example an electron beam). The advantage of the selective melting of superimposed powder layers, more commonly known as sintering, lies mainly in the fact that the shape of these lining elements can be modeled by computer and that the lining elements can then be manufactured on the This modeling is based on 3031472 2 control of the energy beam by the computer. When the selective fusion is performed by a laser beam, it is called laser sintering. The laser sintering technique involves making the piece layer by layer, stacking the consolidated layers of powder and fused to one another by the laser beam in a stacking direction. Patent Application WO-A1-2012 / 156439 describes a particular packing element obtained in part by this laser sintering technique. The packing member is comprised of a sintered molding portion for molding the tread of the tire, and a non-sintered support base integral with the molding portion and forming an interface with the associated mold. The sintered molding portion includes beads and slats to form tread patterns of the tread of the tire.
    [0002] In a manner known per se, the sculptures of the tread of the tire play a fundamental role in the adhesion thereof, mainly in the case of driving on a wet and / or snowy ground. So as to maintain over time a tire 20 having good performance of adhesion and drainage of water, it is known to provide for the tire tread evolutionary sculptures according to its state of wear. For this purpose, cavities are formed under the tread surface of the tread when the tire is new and are intended, after partial wear, to form a new tread pattern, the characteristics of which are adapted to the reduced thickness of the tread. rolling. For more details on such evolutionary sculptures, one can for example refer to the patent application FR-A12 763 892.
    [0003] In this prior document, for molding the cavities under the tread surface of the tread, the associated baking mold comprises a plurality of pins attached to each side shell and protruding from the molding surface of said tread. shell.
    [0004] In order to be able to demold the tire, it is necessary to make each lateral shell in two parts and to provide between them connecting means allowing a rotation of the finger-supporting part with respect to the other part. This substantially increases the manufacturing cost of the mold. In addition, the attachment of the fingers on the side shells does not allow the molding of cavities in all desired areas of the tread of the tire. An alternative solution to obtain the molding of evolutionary sculptures 10 according to the state of wear of the tire is to fix on the sectors of the associated baking mold shaped slats to obtain water-like cutouts in the tread of the tire. pneumatic. FIG. 6 of document FR-A1-2 961 741 discloses such a lamella which is obtained by laser sintering. Indeed, this technique is well suited to the manufacture of small-sized elements and complex shapes, such as these lamellae, which are difficult to manufacture with other methods. However, to obtain water drop type cut-outs, such lamellae comprise a main body having a relatively small cross-section. Deformations and / or deterioration of the lamellae may occur during manufacture, which may lead to the appearance of stress concentrations and micro-cracks. It is thus clear that there is a need to provide a simple and robust solution for performing the molding of evolving sculptures in the tread of a tire. The invention relates to a tire mold lining element comprising a body defining a molding surface for molding at least part of a running surface of the tire. The packing element further comprises at least one injection nozzle disposed on the body and provided with at least one outlet orifice. The packing member also includes at least one feed channel extending within the body and the injection nozzle being in communication with said outlet port.
    [0005] The packing element further comprises at least one shutter movable relative to the injection nozzle between a closed position and an open position of said outlet port. The body, the injection nozzle and the closure member are made by depositing and selectively fusing stacked powder layers. The term "mold" means a set of separate elements which, by relative approximation, allow delimiting an interior molding space.
    [0006] "Running surface" of a tire means the surface of the tread intended to come into contact with the roadway when the tire is rolling. By "packing element" is meant a part of the mold intended to allow the molding of all or part of the rolling surface of the tire. The term "powder" means a powder or a mixture of powders. The powder may for example be metallic, plastic or mineral, for example ceramic. The packing element makes it possible to obtain a molding of 20 evolutive sculptures in the tread of the tire in a simple and robust manner. Indeed, the injection nozzle allows the injection of material (fluid or solid) during the molding step of the tire inside the associated mold, which allows the creation of a cavity formed under the running surface of the tire. The closure member avoids the penetration of the rubber of the tire blank inside the injection nozzle before injection. This prevents the creep of the rubber inside the supply channel. The body, the injection nozzle and the sealing member of the packing element are manufactured at the same time during the selective removal and melting of stacked powder layers. In a preferred embodiment, the injection nozzle is integral with the body and protrudes from the molding surface of said body. By an injection nozzle 3031472 5 "made of material" with the body is meant an injection nozzle made in one piece with the body. Alternatively, the injection nozzle may be movably mounted on the body between a retracted position within said body and an extended position in which it protrudes from the molding surface of said body. Preferably, the closure member is movable from the closed position to the open position under the effect of the pressure of a fluid or a solid introduced into the feed channel. There is thus provided a shutter member configured to allow the passage of the closed position to the open position only under the effect of the pressure of the injected material (fluid or solid). It is therefore not necessary to provide specific means for controlling the movement of the shutter member. In addition, the pressure of the tire blank introduced into the mold keeps the closure member in the closed position as long as the injection of material is not effective. The closure member is mounted freely movable relative to the injection nozzle. The outlet orifice may advantageously lead to a front surface of the injection nozzle substantially parallel to the molding surface of the body. Advantageously, the supply channel comprises means of connection to a power source which is external to the packing element.
    [0007] In one embodiment, the closure member is movable in translation relative to the injection nozzle. The closure member may comprise a piston provided with a rod mounted inside the supply channel and a closure head adapted to close said outlet orifice in the closed position.
    [0008] Alternatively, the closure member may be rotatable relative to the injection nozzle. The shutter member may comprise a flap bearing against the front surface of the injection nozzle in the closed position. The flap can be rotatably mounted via a hinge disposed on the nozzle. Preferably, the body comprises venting means extending from the molding surface and intended to allow air to be evacuated during molding of the tire. The venting means are in communication with the feed channel. Thus, the venting means provided to avoid trapping air between the molding surface and the tire blank during the tire vulcanization step are also used to effect injection of this air by the injection nozzle. These venting means thus fulfill a dual function. Preferably, the packing member also includes a plurality of protuberances projecting from the molding surface of the body and for molding cutouts in the tire tread. "Cutouts" in the tread means the space delimited by material walls extending from the running surface facing each other and spaced from one another by a non-zero distance . The injection-formed cavity (s) may be shifted inwardly of the tire relative to the cutouts. The protuberances may for example be cords and / or strips intended respectively to form grooves and / or incisions in the tread of the tire.
    [0009] In one embodiment, the injection nozzle protrudes from the molding surface of the body. Alternatively, the nozzle may protrude from a free frontal surface of one of the protuberances, for example of one of the cords. Preferably, the exit orifice of the injection nozzle is offset from the side opposite to the body with respect to the protuberances. The invention also relates to a tire mold of the type comprising a tread and two lateral flanks. The mold includes first and second shells for molding the sidewalls of the tire, and a plurality of circumferentially distributed sectors for molding the tread of said tire. Each sector comprises at least one packing element as defined above.
    [0010] The invention further relates to a method of manufacturing at least one packing member, the packing member comprising a body defining a molding surface for molding at least part of a running surface of the tire, the method comprising following steps: a) manufacture by selective deposition and melting of stacked powder layers of the body of the packing element, of at least one injection nozzle disposed on said body and provided with at least one outlet orifice , and a shutter member of said outlet orifice, the injection nozzle being made integral with the body and the closure member 15 being secured to at least said nozzle during the selective melting steps of the powder layers. b) at least partial formation of at least one feed channel extending inside the body and the injection nozzle in communication with the outlet orifice of said nozzle during the depot steps d) and selective melting of the powder layers, and - c) partial disengagement of the closure member and the injection nozzle after the steps of depositing and selective melting of the powder layers to allow mobility of the shutter member 25 between a closed position and an open position of the outlet port of the injection nozzle. In one embodiment, according to a modeled melting of the powder layers, a clearance is provided between a portion of the closure member and a portion facing the injection nozzle which is between 0.05 and and 0.5 mm, and preferably equal to 0.1 mm so that the deposited powder present between said facing parts is wholly or partially fused by heat diffusion locally making the shutter member and the nozzle injection.
    [0011] According to an embodiment in which the shutter member comprises a piston provided with a rod mounted inside the feed channel and a shutter head, the body of the element. The packing is manufactured so as to extend in an inclined manner with respect to a production tray on which a first layer of powder is deposited and fused. The invention also relates to a method of molding a tire using a mold comprising first and second shells for molding the side flanks of the tire, and a plurality of sectors distributed in the circumferential direction and for molding the tread of said tire, wherein the uncured tire blank is contacted with the mold shells and sectors, the blank is heated, and a fluid or solid is provided. is injected under the outer surface of the blank which is in contact with the mold and which is intended to form the running surface of the tire to create at least one cavity in the thickness of said blank and under said rolling surface. The present invention will be better understood on reading the detailed description of embodiments taken by way of non-limiting examples and illustrated by the appended drawings in which: FIG. 1 is a schematic perspective view of an element of 2 is a partial sectional view of the packing element of FIG. 1; FIG. 3 is a schematic sectional view partly illustrating a method of manufacturing the element; FIG. FIG. 1 of FIG. 1 by laser sintering according to a first example of implementation, FIGS. 4 and 5 are detailed views of FIG. 3, FIGS. 6a to 6e are partial sectional views illustrating a method of FIG. for molding a tire with the lining element of FIG. 1, and FIGS. 7 to 9 are partial sectional views of lining elements according to second, third and fourth ith examples of realization. In Figure 1 there is shown a packing element, referenced as a whole, used in a baking mold or vulcanization for a vehicle tire. As will be described in more detail below, the packing member 10 is made by depositing and selectively fusing stacked powder layers. The packing member 10 comprises a body 12 which is delimited by a first surface 14 and a second surface 16 opposite the first surface. The first surface 14 forms a molding surface for molding all or part of the running surface of the tire. The second surface 16 is intended to be in contact with another part of the baking mold to which the lining element 10 is attached. The second surface 16 forms an anchoring surface of the lining element 10 on the other part of the baking mold. In the case of a mold of the sector type, the lining element 10 is fixed on one of the sectors of the mold. The first and second surfaces 14, 16 delimit the thickness of the body 12.
    [0012] The body 12 also includes two opposing side surfaces 18, 20 delimiting the second surface 16. The liner member 10 also includes a plurality of protuberances 22, 24 projecting from the molding surface 14. The protuberances 22 constitute cords for molding grooves in the tread of the tire. By cords means a protuberance whose width is greater than or equal to 2 mm. The protuberances 24 constitute slats for molding incisions in the tread of the tire. Lamella means a protuberance whose width is less than 2 mm. In the exemplary embodiment illustrated, the protuberances 24 forming lamellae extend perpendicular to the protuberances 22 forming cords. The protuberances 22, 24 are integral with the body 12.
    [0013] The packing element 10 further comprises two injection nozzles 26, 28 extending protruding from the molding surface 14 of the body, and two closure members 30, 32 each associated with one of the nozzles. The nozzles 26, 28 are arranged laterally on either side of the protuberances 22, 24. The arrangement and the number of nozzles 22, 24 indicated here in the illustrated embodiment are in no way limiting. The nozzles 26, 28 and the closure members 30, 32 being here respectively identical, only one of them will be described.
    [0014] The injection nozzle 26 extends from the molding surface 14 of the body. The injection nozzle 26 extends here transversely to the molding surface 14. The injection nozzle 26 is integral with the body 12. In the exemplary embodiment illustrated, the injection nozzle 26 has a generally tubular shape. In the exemplary embodiment illustrated, the nozzle 26 extends beyond the protuberances 22, 24. As illustrated more clearly in FIG. 2, the injection nozzle 26 comprises an outlet orifice 26a. Said orifice opens on an end end surface 26b of the nozzle which is situated opposite the molding surface 14 of the body. Said front surface 26b is parallel to the molding surface 14. The packing member 10 also includes a supply channel 34 extending within the body 12 and the injection nozzle 26. The channel 34 opens into the outlet orifice 26a of the nozzle. The channel 34 extends in the thickness of the body 12 and extends longitudinally inside the nozzle 26 of injection. In the exemplary embodiment illustrated, the channel 34 extends from the lateral surface 18 of the body. The channel 34 here comprises a large diameter cylindrical portion 34a extending from the side surface 18 in the thickness of the body 12 and which is extended by a small diameter cylindrical portion 34b extending along the nozzle 26 injection. The channel 34 allows the connection to an external power source (not shown) for the injection of a fluid or a solid. In this regard, the portion of the channel 34 opening on the side surface 18 of the body includes a thread for this connection. In the exemplary embodiment illustrated, a supply channel 34 is specific to each nozzle 26. Alternatively, it is possible to provide a common supply channel to all 5 nozzles. The closure member 30 is here in the form of a piston provided with a closure head 36 and a rod 38 for supporting the head. The head 36 is provided to close off the outlet orifice 26a of the nozzle. The head 36 is located outside said nozzle. The rod 38 extends inside the supply channel 34. As will be described in more detail later, the closure member 30 is movable in translation relative to the injection nozzle 26 and the body 12. The closure member 30 is movable between a closed position the outlet orifice 26a of the nozzle illustrated in Figure 2 and an opening position 15 of said orifice. In the closed position, the head 36 of the closure member covers the outlet orifice 26a. In the open position, the head 36 is located at a distance from the orifice 26a. Figure 3 illustrates a step of the method of manufacturing the packing member 10. This method comprises a plurality of successive steps of depositing powder layers and agglomeration by selective melting of the powder. The powder may for example be metallic, plastic or mineral, for example ceramic. The process begins with a step of depositing a first layer of powder on a work surface 40a of a workbench 40. The manufacturing plate 40 is movable in translation along a vertical axis 40b. After removal, the first layer extends substantially horizontally on the work surface 40a. Then, an energy source 42, for example of the laser type, emits an energy beam whose orientation is controlled by galvanometric mirrors (not shown). An optical lens (not shown) is used to focus the energy beam to heat the powder layer in a pattern corresponding to the desired section, and thereby selectively effect melting of the powder.
    [0015] After the melting step of the first layer deposited, the production plate 40 is lowered by the thickness of this layer and a second layer is deposited to cover the first layer of powder which is partially fused. As an indication, the thickness of a powder layer may vary from a few micrometers, for example 10 μm, to several hundred microns, for example 500 μm. Then, the selective melting of the second layer is carried out as before. These steps are repeated again to form by stacking of the fused layers the packing element 10.
    [0016] In the illustrated embodiment, the packing member 10 is made inclined with respect to the work surface 40a of the production tray. A support 44 is formed for this purpose on the work surface 40a during the steps of selective deposition and melting of the powder layers. This support 44 is used only for the manufacture of the packing element 10. The surface 16 of the packing element 10 extends from an inclined top surface 44a of the support 44. Thus, during the process, it is manufactured on the work plate 40 an intermediate element formed by the support 44 and the packing element 10.
    [0017] The injection nozzle 26 is made integral with the body 12 and the closure member 30 is made integral with said body and the injection nozzle 26 during the selective melting steps of the powder layers. During manufacture, the body 12, the injection nozzle 26 and the closure member 30 are made in one piece. The supply channel 34 is formed during these steps of selective deposition and melting of the powder layers. In order to make the layers forming the shut-off member 30 and the injection nozzle 26 locally integral, a theoretical clearance is provided by modeling between the head 36 of said closure member 30 and the front surface. 26b of said facing nozzle which is between 0.05 and 0.5 mm, and preferably equal to 0.1 mm. With such a theoretical game, the deposited powder present locally between the head 36 and the front surface 26b is wholly or partially fused by heat diffusion. This wholly or partially fused powder by heat diffusion is illustrated schematically in FIG. 4 and referenced 46. In a similar way, a theoretical game modeled and included in the same range of values is provided between the foot of the rod 38 of FIG. support of the shutter member and the cylindrical portion 34a of large diameter of the feed channel so that the deposited powder locally present between the foot and this portion is wholly or partially fused by heat diffusion. This makes it possible to locally secure the shutter member 30 and the body 12. This powder is illustrated schematically in FIG. 5 and referenced 48. These two zones in which powder is wholly or partially fused by heat diffusion, and not by direct sintering under the effect of the energy beam, allows to support the closure member 30 during the manufacture of the lining element 10.
    [0018] After manufacture, the intermediate element formed by the support 44 and the lining element 10 is separated from the production plate 40, for example by cutting by wire electro erosion. The lining element 10 can then be detached from the support 44 also by cutting by wire electro erosion. Subsequently, the closure member 30 is partially disengaged from the injection nozzle 26 and the body 12 by pulling, which may for example be manual, so as to be movable between the closed position and the open position. the outlet orifice 26a of said nozzle. Figs. 6a to 6e partially illustrate steps of molding a tire P with the lining member 10 which is secured within the associated mold (not shown). The blank of the unvulcanized tire P is brought into contact against the molding surface 14 of the packing element as shown in FIGS. 6a and 6b. The displacement of the unvulcanized blank towards the molding surface 14 is illustrated by the arrow 50. In this unvulcanized contacting step with the molding surface 14, the closure member 30 is maintained in the closed position of the outlet orifice 26a of the nozzle by the pressure exerted by the blank. This prevents a creep of the gum of the blank inside the supply channel 34. The surface S of the tire blank coming into contact with the molding surface 14 of the lining element forms part of the running surface of said tire. The injection nozzle 26 extends in the thickness of the tread of the unvulcanized tire blank P. The nozzle 26 sinks in a substantially radial direction by considering the axis of the blank. A recess 52 of corresponding shape to the injection nozzle 26 is formed in the thickness of the tread. This recess 52 extends from the rolling surface S. Then, after the blank has risen in temperature within the mold and just before vulcanization begins, a fluid is injected into the feed channel 34 of the packing member. This fluid injection is schematically illustrated by the arrow referenced 54 in FIG. 6c. Under the effect of the pressure of the injected fluid, the closure member 30 moves from the closed position to the open position of the outlet orifice 26a of the injection nozzle. Upon opening of said opening, a cavity 56 begins to form in the thickness of the tire blank P in the immediate vicinity of the outlet port 26a. The cavity 56 extends the recess 52 inwardly of the blank. The fluid injection then continues as shown in FIG. 6d until the desired size of the cavity 56 is obtained, and is then stopped. Once the injection of fluid stopped, the closure member 30 remains in the open position. The blank of the tire P is held inside the mold until it is completely vulcanized. Then, in a final step, the tire P is pulled out of the mold as schematically illustrated by the arrow 58 referenced in Figure 6e. In the exemplary embodiment of the tire molding method described, the creation of the cavity 56 is obtained by injecting a fluid into the tread of the tire. The fluid may for example be a gaseous material such as air or a liquid material such as water. Alternatively, it is possible to provide an injection of solid material such as a plastic or rubber different from that of the tire. In the case of such an injection, the cavity created by the injection of solid material is filled simultaneously by said material. The exemplary embodiment of the packing element 10 illustrated in FIG. 7, in which the identical elements bear the same references, differs from the first example described in that venting pipes 60 extend from the surface. The ducts 60 join in the thickness of the body 12 and communicate with the cylindrical portion 34b of the supply channel. The conduits 60 are formed during the operations of depositing and selective melting of the powder layers. In the exemplary embodiment illustrated, the ducts 60 are two in number. The venting ducts 60 make it possible to avoid trapping air between the molding surface 14 of the packing element 10 and the tire blank during the vulcanization step of the tire, and to reinject this air in the thickness of the band through the injection nozzle.
    [0019] In the exemplary embodiment illustrated, the supply channel 34 is devoid of the cylindrical portion 34a of large diameter for connection to an external source for the injection of air. Only the reintroduction of the air initially present between the molding surface 14 of the packing element and the tire blank is used to form a cavity under the running surface of the tire. Alternatively, however, it might be possible to retain the design of the supply channel 34 of the first embodiment and provide venting conduits extending from the molding surface 14 of the trim member and opening into the cylindrical portion 34b of said channel. The exemplary embodiment illustrated in FIG. 8, in which the identical elements bear the same references, differs from the first example described only in that the packing element 10 comprises two lugs 62 for supporting the head 36 of the body. 3031472 16 shutter. The ears 62 extend from the front surface 26b of the nozzle being integral with the head 36. The lugs 62 are integral with the injection nozzle 26 and the head 36 of the closure member. The ears 62 are formed during the removal and selective melting of the powder layers. The manufacture of this lining element 10 can be carried out identically to the manufacturing method previously described, namely in an inclined manner with respect to the working surface of the associated manufacturing plate via an intermediate support. After manufacture, the closure member 30 is partially disengaged from the injection nozzle 26 and the body 12 by pulling, which may for example be manual, so as to be movable between the closed position and the open position of the outlet port 26a of said nozzle. The lugs 62 serve only during the manufacture of the lining element 10 for the support of the closure member 30. The embodiment illustrated in FIG. 9, in which the identical elements bear the same references, differs of the first example described only in that the lining element 10 comprises a closure member 64 rotatable relative to the injection nozzle 26 and the body 12. The closure member is in the form of a hinged flap 66 pivoted through a hinge 68 formed on the injection nozzle 26. The flap 66 and the hinge 68 are formed during the operations of depositing and selective melting of the powder layers. The flap 66 and the hinge 68 are integrally formed with the injection nozzle 26. After manufacture, the flap 66 is partially disengaged from the nozzle 26 so as to be movable between the closed position and the open position. In the illustrated exemplary embodiments, each injection nozzle projects from the molding surface of the seal member body. Alternatively, it may be possible to provide alternately or in combination at least one nozzle projecting from a free frontal surface of one of the protuberances provided for molding cutouts in the tread of the tire. In the exemplary embodiments illustrated, each injection nozzle is made in one piece with the body of the packing element. Alternatively, it could be possible to provide an injection nozzle which is manufactured simultaneously with the body and the closure member during removal operations and selective melting of stacked powder layers but which is made mobile after manufacture between a retracted position within the body and an extended position in which it protrudes from the molding surface of said body.
    权利要求:
    Claims (18)
    [0001]
    REVENDICATIONS1. A tire mold lining element comprising a body (12) defining a molding surface (14) for at least partially molding a tread surface of the tire, characterized in that the lining element further comprises at least one injection nozzle (26) disposed on the body and provided with at least one outlet port (26a), at least one supply channel (34) extending inside the body and the nozzle injection being in communication with said outlet port, and at least one closure member (30; 64) movable with respect to the injection nozzle between a closed position and an open position of said outlet port; body (12), the injection nozzle (26) and the closure member (30; 64) being manufactured by selectively depositing and fusing stacked powder layers.
    [0002]
    2. Packing element according to claim 1, wherein the injection nozzle (26) is integral with the body (12) and protrudes from the molding surface (14) of said body.
    [0003]
    3. packing element according to claim 1 or 2, wherein the closure member (30; 64) is movable from the closed position to the open position under the effect of the pressure of a fluid or a solid introduced into the feed channel (34).
    [0004]
    4. packing element according to any one of the preceding claims, wherein the outlet orifice (26a) opens on a front surface (26b) of the injection nozzle substantially parallel to the molding surface (14) of the body .
    [0005]
    5. Packing element according to any one of the preceding claims, wherein the supply channel (34) comprises means for connection to a power source external to said element.
    [0006]
    6. Packing element according to any one of the preceding claims, wherein the closure member (30) is movable in translation relative to the injection nozzle (26). 3031472 19
    [0007]
    Packing element according to claim 6, wherein the closure member (30) comprises a piston provided with a rod (38) mounted inside the feed channel (34) and a head (36) shutter capable of closing said outlet port in the closed position.
    [0008]
    8. Packing element according to any one of claims 1 to 5, wherein the closure member (64) is rotatable relative to the injection nozzle (26).
    [0009]
    9. Packing element according to claim 8, wherein the shutter member (64) comprises a flap (66) bearing against a front surface (26b) of the injection nozzle substantially parallel to the surface of the nozzle. molding (14) the body in the closed position of the body.
    [0010]
    Packing element according to any one of the preceding claims, wherein the body (12) comprises venting means (60) extending from the molding surface (14) and intended to permit evacuation. air during the molding of the tire, said venting means being in communication with the supply channel (34). 20
    [0011]
    A packing member according to any one of the preceding claims, comprising a plurality of protuberances (22, 24) projecting from the molding surface (14) of the body and intended to mold cutouts in the strip. of the tire. 25
    [0012]
    12. Packing element according to claim 11, wherein the injection nozzle protrudes from a free front surface of one of said protuberances.
    [0013]
    A packing member according to any one of claims 1 to 11, wherein the injection nozzle (26) protrudes from the molding surface (14) of said body.
    [0014]
    14. A tire mold of the type comprising a tread and two lateral flanks, the mold comprising first and second shells for molding the side flanks of the tire, and a plurality of sectors distributed in the circumferential direction and intended to to ensure the molding of the tread of said tire, each sector comprising at least one lining element according to any one of the preceding claims. 5
    [0015]
    A method of manufacturing at least one packing element, the packing element comprising a body defining a molding surface for molding at least part of a running surface of the tire, characterized in that it comprises the steps following: 10 - a) manufacture by selective removal and melting of stacked powder layers of the body of the packing element, of at least one injection nozzle disposed on said body and provided with at least one outlet orifice, and a closure member of said outlet orifice, the injection nozzle being made integral with the body and the closure member being secured to at least said nozzle during the selective melting steps of the powder layers, b) at least partial formation of at least one feed channel extending inside the body and the injection nozzle in communication with the outlet orifice of said nozzle during the steps removal and melting elective of the powder layers, and - c) partial disengagement of the closure member and the injection nozzle after the steps of depositing and selective melting of the powder layers to allow mobility of the member 25 of shutter between a closed position and an open position of the outlet orifice of the injection nozzle.
    [0016]
    16. The method of claim 15, wherein according to a modeled melting of the powder layers, a clearance is provided between a portion of the closure member and a portion facing the injection nozzle which is between 0. , 05 and 0.5 mm, and preferably equal to 0.1 mm so that the deposited powder present between said parts opposite is all or part fused by heat diffusion locally rendering the shutter member and the nozzle injection. 3031472 21
    [0017]
    17. The method of claim 15 or 16, wherein the closure member comprises a piston provided with a rod mounted within the feed channel and a closure head, and wherein the body The packing member is manufactured so as to extend inclined with respect to a production tray on which a first layer of powder is deposited and fused.
    [0018]
    18. A method of molding a tire using a mold comprising first and second shells for molding the lateral flanks of the tire, and a plurality of sectors distributed in the circumferential direction and intended to provide the molding the tread of said tire, wherein the blank of the unvulcanized tire to be molded is brought into contact with the shells and sectors of the mold, the blank is heated, and a fluid or a solid is injected under the surface outer surface of the blank which is in contact with the mold and which is intended to form the running surface of the tire to create at least one cavity in the thickness of said blank and under said rolling surface.
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    同族专利:
    公开号 | 公开日
    US20180297305A1|2018-10-18|
    EP3242792B1|2021-12-15|
    US10618237B2|2020-04-14|
    FR3031472B1|2017-02-17|
    EP3242792A1|2017-11-15|
    WO2016110562A1|2016-07-14|
    CN107107400A|2017-08-29|
    CN107107400B|2019-04-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5059380A|1990-02-22|1991-10-22|The Uniroyal Goodrich Tire Company|Tire mold vent plug and method|
    WO2000023238A1|1998-10-19|2000-04-27|Pirelli Pneumatici S.P.A.|Removable hollow plug for air vent in a mold|
    KR20020003020A|2000-06-30|2002-01-10|조충환|Vulcanizing mold for Vehicle Tire|
    FR2881680A1|2005-02-04|2006-08-11|Michelin Soc Tech|Tire manufacture comprises preparing a tire tread with raw basic mixture, injecting the mixture into the tread through air funnel using volumetric extrusion machine, molding the tire tread and positioning a core which carries the raw tire|
    JP2011031452A|2009-07-31|2011-02-17|Bridgestone Corp|Method for manufacturing retreaded tire, mold for manufacturing retreaded tire and vulcanizer|
    EP2689920A1|2012-07-26|2014-01-29|Continental Reifen Deutschland GmbH|Method and device for supporting the demoulding of a vulcanised pneumatic tyre for a vehicle|
    FR2996798A1|2012-10-17|2014-04-18|Michelin & Cie|PNEUMATIC MOLD MOLDING ELEMENT COMPRISING A PLURALITY OF HOLES|
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    US3961657A|1974-05-03|1976-06-08|The Goodyear Tire & Rubber Company|High speed radial ply tire|
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    GB9708584D0|1997-04-29|1997-06-18|Sp Tyres Uk Ltd|Mould vents|
    FR2763892A1|1997-05-30|1998-12-04|Michelin & Cie|SCULPTURE AND MOLD FOR TIRE TREAD|
    CN100566969C|2007-04-05|2009-12-09|鸣庆企业股份有限公司|Templet assembly device for mould|
    FR2925394B1|2007-12-21|2011-06-10|Michelin Soc Tech|TIRE, MOLD FOR VULCANIZING THE TIRE, METHOD OF MANUFACTURING THE MOLD, AND MOLD MATRIX|
    DE102010000242A1|2010-01-28|2011-08-18|Continental Reifen Deutschland GmbH, 30165|Device for assembling tire module on tire of vehicle for identification of tire, has elastic element top surface completely enclosing module such that even contact pressure is transferred on edge and middle areas of tire module|
    FR2961741B1|2010-06-25|2012-08-03|Michelin Soc Tech|LAMELLE FOR A TRIM OF A MOLD FOR THE VULCANIZATION OF A TIRE TREAD OF A TIRE|
    FR2975319B1|2011-05-17|2014-04-11|Michelin Soc Tech|METHOD FOR MANUFACTURING LASER SINTER MOLDING ELEMENT|
    JP2013103478A|2011-11-16|2013-05-30|Sumitomo Rubber Ind Ltd|Raw cover|JP6754683B2|2016-11-29|2020-09-16|株式会社ブリヂストン|Tire mold and tire mold manufacturing method|
    WO2019106540A1|2017-11-30|2019-06-06|Compagnie Générale Des Établissements Michelin|Moulding element with a plurality of enlargements|
    DE102018202603A1|2018-02-21|2019-08-22|Continental Reifen Deutschland Gmbh|Method for producing molded segments of a segmented vulcanization mold for vehicle tires|
    WO2019163213A1|2018-02-22|2019-08-29|株式会社ブリヂストン|Tire molding mold, method for manufacturing tire molding mold, and tire|
    法律状态:
    2016-01-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-07-15| PLSC| Publication of the preliminary search report|Effective date: 20160715 |
    2017-01-20| PLFP| Fee payment|Year of fee payment: 3 |
    2018-01-19| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-27| ST| Notification of lapse|Effective date: 20190906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550134A|FR3031472B1|2015-01-08|2015-01-08|PNEUMATIC MOLD TRIM MEMBER AND METHOD OF MANUFACTURING THE SAME|FR1550134A| FR3031472B1|2015-01-08|2015-01-08|PNEUMATIC MOLD TRIM MEMBER AND METHOD OF MANUFACTURING THE SAME|
    CN201680005284.0A| CN107107400B|2015-01-08|2016-01-08|Mould element and relative manufacturing process for tire-mold|
    EP16700186.6A| EP3242792B1|2015-01-08|2016-01-08|Matrix element for tyre mould and associated manufacturing method|
    US15/542,283| US10618237B2|2015-01-08|2016-01-08|Matrix element for tire mould and associated manufacturing method|
    PCT/EP2016/050263| WO2016110562A1|2015-01-08|2016-01-08|Matrix element for tyre mould and associated manufacturing method|
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