Grooved core tool for manufacturing pneumatic tires reinforced by a support passing through the pneumatic chamber

Abstract

The present invention relates to a tool (1) intended for use in manufacturing a toroidal tire carcass (2) comprising a crown (3), a first annular bead (4) and a second annular bead (5), and a first sidewall (6) and a second sidewall (7). The tool (1) comprises a core (10) having groove-type channels (15) intended to receive reinforcing elements referred to as “supports” (16), which are designed to be permanently integrated into the structure of the tire carcass (2), and each support (16) extending through a tire cavity (9) to connect a crown anchor point (17) in the crown (3) of the carcass to a lateral anchor point (18) in one of the sidewalls (6, 7) or the bead (5, 6) of the carcass.

Description

Technical Field

[0001] This invention relates to the general field of manufacturing toroidal tires, and more particularly to pneumatic tires intended for mounting on vehicle wheels. Background Technology

[0002] In order to improve the performance of pneumatic tires, especially cornering performance, the applicant conceived of using support reinforcements that extend within the annular inflation cavity defining the tire, and each support reinforcement connects an anchor point located in the tire sidewall or bead to an anchor point located on the tire crown.

[0003] Of course, because of the very special shape of this supported tire, the manufacturing tools used in industry are not suitable for producing such tires. Summary of the Invention

[0004] Therefore, the object of this invention is to overcome the above-mentioned disadvantages and to provide a tool and manufacturing method that enables the production of high-quality supported tires in a relatively simple and repeatable manner.

[0005] The object belonging to this invention is achieved by a tool suitable for manufacturing a toroidal tire, the toroidal tire including a crown, a first annular bead and a second annular bead, and a first sidewall and a second sidewall, the crown being adapted to form a tread, the first and second annular beads being designed to attach the tire to a mounting support such as a rim, the first and second sidewalls respectively connecting the crown to the first and second beads, the crown, the first and second sidewalls, and the first and second beads integrally forming a wall with a concave inner surface defining the cavity of the tire, the tool including a toroidal core having a convex outer surface called a "receiving surface" around its central axis, the shape of the receiving surface conforming to the inner surface of the tire wall, the receiving surface including a radially outer crown region and a first lateral region and a second lateral region on both axial sides of the crown region, the radially outer crown region being adapted to form a tread, the first and second annular beads being designed to attach the tire to a mounting support such as a rim, the first and second sidewalls being respectively connecting the crown to the first and second beads, the crown being adapted to form a tread, the first and second annular beads being adapted to form a tread, the first and second annular beads being adapted to form a tread, the first and second sidewall ... A tool is provided for receiving components forming a tire crown, wherein a first lateral region rotates toward a central axis and is adapted to receive components forming a first sidewall and a first bead, and a second lateral region rotates toward a central axis and is adapted to receive components forming a second sidewall and a second bead, such that a core includes a volume referred to as a “reserved volume” externally defined by a receiving surface and corresponding to the cavity of the tire. The tool is characterized in that the core has a plurality of channels extending within the reserved volume below the receiving surface and leading to the receiving surface, such that each channel connects a crown region of the receiving surface to one of the first and second lateral regions. The core is thus able to receive reinforcing elements referred to as “supports” within the channels, the supports being designed to be permanently integrated into the tire structure, and each support extending within the tire cavity, connecting a crown anchor located in the tire crown to a lateral anchor located in one of the tire sidewall or the bead.

[0006] Advantageously, using the core according to the invention allows the support to be positioned in a desired location within the volume reserved in the core, thereby allowing the support to be positioned in the space that subsequently becomes the tire cavity after the tire has been shaped and the core has been removed.

[0007] Advantageously, when the support is placed in the core, a portion of each support is located in the corresponding channel, and thus in the spatial region corresponding to the future tire cavity, while the end of the support extends out of the channel on the receiving surface.

[0008] When the various rubber-based components that form the tire wall are subsequently laid (e.g., by spiral winding of continuous strips) on the receiving surface of the core, the ends of each support are thus immediately and permanently integrated into the structure of the tire wall, while the middle portion of the relevant support in the channel is arranged backward from the receiving surface, thus remaining detached and at a certain distance from the tire wall during and after the laying of the components that form the tire wall, and thus preferably in the position from the beginning where the middle portion of the support will permanently occupy the tire cavity.

[0009] Furthermore, since the core has a toroidal shape corresponding to the desired final shape of the tire, the tire wall can be advantageously formed directly as needed in a manner known per se simply by laying the components that form the tire wall onto the core.

[0010] Next, the tire-bearing core is placed into a mold to cure the tire, which vulcanizes the rubber-based components of the tire's walls. After this curing process, the core is separated from the tire, thereby releasing the tire's cavity and permanently leaving the support in place within the cavity.

[0011] Advantageously, the tool according to the invention thus makes it possible to obtain properly shaped supported tires repeatably from the outset, without any risk of misalignment or damage to the supports during tire manufacturing. Attached Figure Description

[0012] Other objects, features, and advantages of the invention will become more apparent from the following description and with the aid of the accompanying drawings, which are provided by way of non-limiting illustration only, wherein:

[0013] Figure 1A and Figure 1B Examples of supported tires produced according to the invention are shown in cross-sectional views and perspective views along the radial plane, respectively, wherein the crown anchor point and lateral anchor point of each support are located at the same azimuth angle around the central axis of the tire, such that the support extends along a radial plane containing the central axis of the tire.

[0014] Figure 2A and Figure 2B Another example of a supported tire produced according to the invention is shown in a cross-sectional view of the radial plane and a sectional perspective view along the radial section, wherein the crown anchor point and lateral anchor point of each support are angularly offset relative to each other in azimuth about the central axis of the tire. In each hemisphere of the tire, the tire also includes two sets of supports, the first set of supports having angular offsets of the anchor points in one direction and the second set of supports having angular offsets in another direction, such that the supports in a single hemisphere are intersecting.

[0015] Figure 3A and Figure 3B An annular subassembly is shown in exploded and assembled perspective views, respectively, forming a central ring of a core according to the invention. The central ring forms a central portion of a crown region suitable for receiving components forming a tire crown. The central ring is subdivided angularly into sector regions that form alternating sector regions called arched segments and sector regions called locking portions, the locking portions being designed to lock the arched segments in place.

[0016] Figure 4A , Figure 4B and Figure 4C The tool according to the invention is shown in partially exploded perspective view, assembled perspective view, and detailed cross-sectional view in the radial plane, respectively. The tool comprises... Figure 3A and Figure 3B The central ring of the tire has two annular sub-assemblies called "lugs" mounted on it. Each annular sub-assembly is adapted to receive components forming the tire sidewall and includes channels for support, wherein the channels are in the form of grooves oriented radially in a plane to produce, as Figure 1A and Figure 1B The tire shown is an example. To facilitate removal and extraction of the core from the tire, each lug is subdivided into fan-shaped sections at an angle, which alternately form arched segments and locking sections. It should be noted that, for ease of description, Figure 4C The left and right halves of the core correspond to cross sections along two different radial planes, which are slightly offset from each other in azimuth around the central axis of the core, such that the half located to the left of the equatorial plane is a hollow portion passing through the groove, while the half located to the right of the equatorial plane is a solid sidewall passing through the groove.

[0017] Figure 5A , Figure 5B and Figure 5C The tool according to the invention is shown in partially exploded perspective view, assembled perspective view, and detailed cross-sectional view in the radial plane, respectively. The tool comprises... Figure 3A and Figure 3B The central ring of the tire has two annular sub-assemblies called "lugs" mounted on it. Each annular sub-assembly is adapted to receive components forming the tire sidewall and includes channels for support, which are in the form of intersecting grooves to create... Figure 2A and Figure 2B The tire shown in the image. Figures 4A to 4C In a variant form, each lug is subdivided into fan-shaped sections at an angle, which alternately form arched sections and locking parts to facilitate removal and extraction of the core from the tire.

[0018] Figure 6A , Figure 6B and Figure 6C The figures are shown in partially exploded perspective, assembled perspective, and detailed cross-sectional view in the radial plane. Figures 4A to 4C A variant of the tool with radial grooves is provided with a blocking device adapted to prevent the rubber base components of the tire from penetrating into the grooves. For this purpose, the blocking device includes a first set of shielding elements and a second set of shielding elements. The first set of shielding elements is formed by fan-shaped housings, each fan-shaped housing covering the fan-shaped area of ​​the lug according to the shoulder curve of the transition zone between the lateral area forming the lug and the crown area, thereby shielding the corresponding groove. The second set of shielding elements includes annular bands disposed in the transition zone between each lug and the center ring to cover the grooves in the crown area. It should be noted that, for ease of description, Figure 6C The left and right halves of the core correspond to cross sections along two different radial planes, which are slightly offset from each other in azimuth around the central axis of the core, such that the half located to the left of the equatorial plane is a hollow portion passing through the groove, while the half located to the right of the equatorial plane is a solid sidewall passing through the groove.

[0019] Figure 7A , Figure 7B and Figure 7C An exemplary embodiment of the lug locking part is shown in a perspective view, a front view projected onto a plane perpendicular to the central axis of the core, and a cross-sectional view in a sagittal meridian plane. The lug locking part is provided with a radial groove and its parting line is parallel to the sagittal meridian plane of the lug (i.e., a radial plane passing through the middle of the corresponding sector).

[0020] Figure 8A , Figure 8B and Figure 8C The diagrams show the relationship between the convex arch section, the front view projected onto a plane perpendicular to the core's central axis, and the cross-sectional view along the sagittal meridian plane (i.e., the radial plane passing through the middle of the corresponding sector). Figures 7A to 7C An example of a lug arched section that complements the lug locking part in a lug.

[0021] Figure 9A , Figure 9B and Figure 9C The diagrams are shown in three-dimensional form, a front view projected onto a plane perpendicular to the core's central axis, and a cross-sectional view in the sagittal meridian plane (corresponding to the radial plane passing through the center of the corresponding sector). Figures 7A to 7C A variant of the locking part is provided with a recess that is suitable for receiving and positioning the shielding housing covering the groove.

[0022] Figure 10 A partial front view is shown, projected onto a plane perpendicular to the center axis of the core. Figures 7A to 7C The lug locking part and Figures 8A to 8C The ring-shaped lug is assembled from the arched section of the lug.

[0023] Figure 11A , Figure 11B and Figure 11C The lug locking portion with cross grooves suitable for cross supports is shown in a perspective view, a front view projected onto a plane perpendicular to the central axis of the core, and a cross-sectional view in a sagittal meridian plane. The grooves are defined by sidewalls generated along an axial generating direction that is vectorically collinear with, or parallel to, the central axis.

[0024] Figure 12A , Figure 12B and Figure 12C The lug-shaped arch section with intersecting grooves is shown in a three-dimensional view, a front view projected onto a plane perpendicular to the core's central axis, and a cross-sectional view along the sagittal meridian plane. Figures 11A to 11C The locking parts are complementary.

[0025] Figure 13A , Figure 13B , Figure 13C and Figure 13D A lug locking portion with a cross groove suitable for a cross support is shown, wherein the sidewalls of the groove are formed along an oblique generating direction. The lug locking portion is shown in a perspective view, a front view projected onto a plane perpendicular to the central axis of the core, a cross-sectional view of the sagittal meridian plane of the relevant sector area, and a view projected from the outside of the core onto a plane perpendicular to the oblique generating direction.

[0026] Figure 14A , Figure 14B , Figure 14C and Figure 14D With Figures 13A to 13D The same view shows the same Figures 13A to 13D The locking portion of the middle part has a complementary lug arched section with cross grooves, the grooves being defined by walls generated along the oblique generation direction.

[0027] Figure 15A , Figure 15B and Figure 15C The diagrams are shown in three-dimensional view, cross-sectional view in the sagittal meridian plane, and radial projection view from the inside of the core. Figures 13A to 13D A variant of the lug locking part, in which the inner surface of the lug locking part is provided with grooves that extend between solid walls defining the grooves, in order to reduce the weight of the lug locking part and reduce its thermal inertia.

[0028] Figure 16A , Figure 16B , Figure 16C and Figure 16DThe schematic diagram illustrates the geometric principle for generating parting lines, applicable to lug locking portions with intersecting grooves, the walls of which are defined by an oblique generating direction, for example... Figures 13A to 13D and Figures 15A to 15C The lug locking part in the middle.

[0029] Figure 17 A partial perspective view, corresponding to the viewing angle and the oblique generation direction, shows a lug assembled from a lug locking part and a lug arched section, with its grooves and parting lines obtained in the oblique generation direction, as shown. Figures 13A to 13D and Figures 14A to 14D or Figures 15A to 15C The situation of the convex lug sector in the middle.

[0030] Figure 18A and Figure 18B A variant embodiment of the lug locking part with cross grooves is shown in a perspective view and a view projected in the generation direction of the sidewalls of the cross grooves. In this variant embodiment, the parting line is generated in the oblique generation direction along a serrated cutting line that starts from the base surface profile and corresponds to a dashed line on the receiving surface consisting of alternating sides of quadrilaterals that define the cross grooves on the receiving surface and continue from the crown region to the lateral region.

[0031] Figure 19 A partial three-dimensional view, showing the lug assembled from the lug locking part and the lug arch section, is presented with its parting line corresponding to the viewing angle and the oblique generation direction. Figure 18A and Figure 18B The locking part of the lug in the middle also follows the serrated cutting line.

[0032] Figure 20A , Figure 20B , Figure 20C , Figure 20D , Figure 20E and Figure 20F The cross-sectional view in the radial plane illustrates the removal of the lug locking part from the tire by axial translation followed by tilting, as shown here. Figures 6A to 6C The tool shown has radial grooves and a shielding housing (with features such as...) Figures 9A to 9C The process is carried out within the convex lug shown.

[0033] Figure 21A , Figure 21B and Figure 21C A partial three-dimensional cross-sectional view in the radial plane is shown according to Figures 20A to 20F The removal movement shown is more specifically based on Figure 20C , Figure 20D and Figure 20E Remove the lug locking part at the stage shown.

[0034] Figure 22A , Figure 22B and Figure 22C The cross-sectional view of the radial plane illustrates the extraction of this part based on the oblique extraction movement. Figures 15A to 15C The lug locking part of the type shown is provided in which the oblique removal movement is generated according to the oblique generation direction, which is contained in the sagittal meridian plane of the lug locking part and is used to generate the sidewall of the groove of the lug locking part.

[0035] Figure 23 A partial perspective view shows a variant embodiment in which the blocking device uses a set of gaskets that are inserted into the groove to seal it after the support is placed in the groove, which is flush with the receiving surface.

[0036] Figure 24 With the meridian plane (which passes through according to Figures 4A to 4C A detailed cross-sectional view of the groove in the lug of the core shows the placement of the support in the core before the tire wall is prepared.

[0037] Figure 25 The schematic diagram illustrates the principle of fabricating a support using a single continuous filament joined in successive channels to form a serpentine pattern, wherein the loops forming the alternating ends of the serpentine pattern are adapted to form lateral anchor points for the support. Detailed Implementation

[0038] This invention relates to tools 1, particularly such as Figure 4A , Figure 4B , Figure 4C , Figure 5A , Figure 5B , Figure 5C , Figure 6A , Figure 6B and Figure 6C As shown, tool 1 is suitable for manufacturing such as Figure 1A , Figure 1B , Figure 2A and Figure 2B The toroidal tire 2 shown.

[0039] This tire 2 is preferably formed as a pneumatic tire, which is suitable for mounting on the wheels of a vehicle to provide contact between the vehicle and the ground.

[0040] The shape of tire 2 exhibits rotational symmetry about an axis referred to as the "central axis" Z2, which substantially corresponds to the axis of rotation of the wheel. This central axis Z2 defines three directions commonly used by those skilled in the art: axial, radial, and circumferential.

[0041] "Axial direction" refers to the direction that is collinear (i.e. parallel) with the tire's central axis Z2 in terms of vector, that is, the direction that is parallel to the tire's axis of rotation.

[0042] "Radial direction" refers to the direction extending along the tire radius, that is, any direction that intersects and is perpendicular to the central axis Z2.

[0043] "Circumferential direction" refers to the direction that is perpendicular to both the axial direction and the radius of the tire. Therefore, in a plane perpendicular to the central axis Z2, this direction corresponds to the tangent of the circle centered on the axis of rotation of the tire.

[0044] The "meridian plane" P_MER, or "radial plane," refers to a plane that is parallel to and contains the central axis Z2. Therefore, this meridian plane is perpendicular to the circumferential direction.

[0045] The “equatorial plane” P_EQ represents a plane perpendicular to the central axis Z2 and passing through the outermost radial point of the tire. This plane is preferably located axially between the outermost axial points of the tire. Thus, by analogy to a sphere, the equatorial plane divides the tire 2 axially into two toroidal halves called “hemispherical” (preferably substantially equal).

[0046] The tire 2 includes, in a manner known per se, a crown 3, a first annular bead 4 and a second annular bead 5, and a first sidewall 6 and a second sidewall 7. The crown 3 is adapted to form a tread. The first annular bead 4 and the second annular bead 5 are designed to attach the tire 2 to a mounting support (e.g., a rim). The first sidewall 6 and the second sidewall 7 respectively connect the crown 3 to the first bead 4 and the second bead 5.

[0047] By convention, in the radial plane P_MER, the boundary between the tire crown 3 and the associated sidewalls 6 and 7 can be regarded as the outermost point of the axial direction corresponding to the outer surface of the tire 2. For this outermost point, the angle between the tangent of the outer surface of the tire 2 and the straight line parallel to the central axis Z2 is equal to 30 degrees.

[0048] The crown 3, the first sidewall 6 and the second sidewall 7, and the first bead 4 and the second bead 5 together form a wall 8 with a concave inner surface 8_in, which defines the cavity 9 of the tire 2.

[0049] In fact, the cavity 9 of the tire is toroidal and advantageously forms the inflation cavity of the tire 2, which is adapted to receive pressurized fluid (such as air) to support the crown 3 of the pneumatic tire 2 relative to the rim.

[0050] Preferably, such as from Figure 1A and Figure 2AAs can be clearly seen, the bead 4 and 5 are positioned axially from the most protruding part of the corresponding sidewall 6 and 7, meaning that the bead 4 and 5 are closer to the equatorial plane P_EQ than the sidewall 6 and 7 that connect to the bead. Therefore, between the crown 3 and the bead 4 and 5, the sidewall 6 and 7 form a generally outwardly curved profile in the cross-section of the meridian plane P_MER, with the ends forming the bead 4 and 5 being axially concave, so that in the cross-section of the meridian plane, the cavity 9 is essentially Ω-shaped (uppercase omega).

[0051] According to the present invention, the tool 1 includes a toroidal core 10 having a convex outer surface 10_out, referred to as a "receiving surface" 10_out, about its central axis Z10. The shape of the convex outer surface 10_out mates with the inner surface 8_in of the tire wall 8. The convex outer surface 10_out includes a radial outer crown region 11 and a first lateral region 12 and a second lateral region 13 on both axial sides of the crown region. The radial outer crown region 11 is adapted to receive components forming the crown 3 of the tire 2. The first lateral region 12 rotates toward the central axis Z10 of the core and is adapted to receive components forming the first sidewall 6 and the first bead 4. The second lateral region 13 rotates toward the central axis Z10 and is adapted to receive components forming the second sidewall 7 and the second bead 5.

[0052] Therefore, the core 10 includes a volume referred to as a “reserved volume”, which is externally defined by the receiving surface 10_out and corresponds to the cavity 9 of the tire 2.

[0053] Therefore, during the tire manufacturing process, the core 10 can occupy and thus temporarily reserve a certain volume, the shape and size of which correspond to the shape and size of the cavity 9. When the core 10 is removed from the tire 2 during the demolding operation at the end of the tire 2 manufacturing cycle, this volume becomes the cavity 9 of the tire 2.

[0054] It should be noted that in practice, the central axis Z10 of the core 10 (around which the core 10 forms a ring) will coincide with the central axis Z2 of the tire 2 manufactured on the core 10. Therefore, for ease of description, either of them can be referred to as the "central axis".

[0055] According to the invention, the core 10 has a plurality of channels 15 extending within a reserved volume below the receiving surface 10_out and leading to the receiving surface 10_out, such that each channel 15 connects the crown region 11 of the receiving surface 10_out to one of a first lateral region 12 and a second lateral region 13, thereby allowing the core 10 to receive reinforcing elements 16 referred to as “supports” 16 within the channels 15, the supports 16 being designed to be permanently integrated into the structure of the tire 2, and each support 16 extending in the cavity 9 of the tire, connecting a crown anchor point 17 located in the crown 3 of the tire 2 to a lateral anchor point 18 located in one of the sidewalls 6, 7 or the beads 4, 5 of the tire 2.

[0056] Therefore, the channels 15 correspond to the empty spaces formed by the core 10 within the reserved volume, so that they can receive the supports 16, thereby allowing each support 16 to pass through the receiving surface 10_out, firstly to enter the reserved volume (here, through the lateral regions 12, 13), and secondly to exit the reserved volume (here, in the crown region 11), and vice versa.

[0057] Without departing from the scope of the invention, the support 16 may have different constructions, and in particular, various orientations.

[0058] According to the corresponding Figure 1A and Figure 1B In one possible implementation, the crown anchor point 17 and lateral anchor point 18 of each support member 16 are thus located at the same azimuth angle around the central axis Z2 of the tire, such that the support member 16 extends along a radial plane containing the central axis Z2 of the tire.

[0059] According to the corresponding Figure 2A and Figure 2B Another possible implementation is that the crown anchor point 17 and the lateral anchor point 18 of each support 16 are offset relative to each other in azimuth about the central axis Z2 of the tire, thereby creating inclined support 16. More preferably, the tire 2 may include two sets of support 16 in a single hemisphere (preferably in each of the two hemispheres of the tire), such that each support 16 in the first set has an angular offset between its crown anchor point 17 and its lateral anchor point 18 in a first direction (e.g., in a clockwise direction), while each support 16 in the second set has an angular offset between its crown anchor point 17 and its lateral anchor point 18 in the opposite second direction (e.g., in a counterclockwise direction), such that the support 16 of the first set and the support 16 of the second set intersect in a single hemisphere.

[0060] Preferably, all the lateral anchor points 18 of the support member 16 in the single hemisphere are located on the same abscissa along the central axis Z2, that is, the support member 16 in the single hemisphere preferably emerges from the wall 8 of the tire 2 along a single imaginary line, which corresponds to the intersection line of the inner surface 8_in of the wall 8 and the plane perpendicular to the central axis Z2.

[0061] With the necessary modifications, the same applies to the crown anchor points 17 of the support member 16 in a single hemisphere, all of which are preferably located on the same abscissa along the central axis Z2, preferably separate from the abscissa of the lateral anchor points 18.

[0062] Furthermore, for a given support 16, or even for all supports 16, the abscissa of the crown anchor point 17 is preferably closer to the equatorial plane P_EQ than the abscissa of the lateral anchor point 18.

[0063] In any case, that is, regardless of the existence of such Figure 1A In the case of the support member 16 contained in the radial plane, or in the case of the presence of such Figure 2A In the case of inclined and / or intersecting supports 16, each support 16 is preferably contained within a single hemisphere, and no support 16 crosses the equatorial plane P_EQ within the tire cavity 9. That is, the lateral anchor point 18 and the crown anchor point 17 are both located in the same hemisphere on the same side of the equatorial plane P_EQ, wherein the lateral anchor point 18 and the crown anchor point 17 form the two ends of a single segment of the support 16 extending continuously within the cavity 9, thus forming two consecutive points through which the support 16 emerges from the wall 8 and passes through the cavity 9, then exits the cavity 9 and re-enters the wall 8. This makes it particularly easy to simplify the structure of the tool 1 and the demolding operation.

[0064] Preferably, regardless of the presence of, Figure 1A In the case of the support member 16 contained in the radial plane, or in the case of the presence of such Figure 2A In the case of inclined and / or intersecting supports 16, each support 16 is adapted to operate under tension and is therefore adapted to connect the crown anchor 17 to the corresponding lateral anchor 18 along a straight segment, which is geometrically formed as a taut or nearly taut chord below an arc formed by the inner surface 8_in of the wall 8 between the crown anchor 17 and the lateral anchor 18 of the stationary tire 2, such that the support 16 resists the mutual separation of the anchors 17 and 18, thereby increasing the lateral stiffness of the tire.

[0065] Furthermore, the support members 16 in a single set of support members are preferably evenly distributed in the azimuth angle around the central axis Z2 with a constant repeating angular pitch P16.

[0066] The repeating angular pitch P16 is preferably between 0.5 degrees and 5 degrees, more preferably between 0.75 degrees and 3 degrees, and particularly between 1 degree and 3 degrees, for example, equal to 1.5 degrees. Therefore, each group of supports 16 may include between 72 and 480 (or even 720) supports, preferably between 120 and 360 supports, with 240 supports as a preferred example.

[0067] These values ​​of repeating angular pitch P16 are particularly applicable to tires 2 intended for use in passenger vehicles as defined by the European Tire and Rim Technology Organization (or ETRTO) standard of 2020, and especially to tires intended for mounting on rims with a mounting diameter of at least 12 inches, preferably at least 16 inches, and at most 24 inches, preferably at most 22 inches.

[0068] In practice, the aforementioned repeating angular pitch P16 allows for a satisfactory compromise between two aspects: on the one hand, the number of supports 16 is sufficient to effectively reinforce the tire 2 even if one or more supports 16 break; on the other hand, the number of supports 16 is moderate enough to allow for the arrangement of a corresponding number of channels 15 in the core 10 without excessively weakening the structure of the core 10 or complicating the demolding operation.

[0069] For example, for the aforementioned diameter of tire 2, a repeating pitch P16 of 1.5 degrees is provided at the maximum diameter of the inner surface 8_in of the wall 8 of tire 2, or in the same manner at the maximum diameter of the outer surface of the forming receiving surface 10_out of the core 10 in the crown region 11, with a support 16 provided every 5 mm to 10 mm (e.g., approximately every 8 mm) around the arc length measured around the central axes Z2, Z10, and thus a support channel 15 is provided.

[0070] Preferably, the support 16 is made of one or more filamentary elements, the maximum lateral dimension of which is at least 10 times, at least 20 times, or at least 50 times smaller than the visible length of the portion of the associated support 16 extending in the cavity 9 (i.e., the length of the support 16 between the crown anchor point 17 and the corresponding lateral anchor point 18).

[0071] Therefore, the support 16 can be formed from single-strand or multi-strand yarns made of woven materials, polymer materials (such as aramid), or even metallic materials. According to one possible embodiment, the support 16 is made from composite yarns using glass fiber and resin.

[0072] Advantageously, regardless of the construction of the support member 16, the core 10 according to the invention allows the support member 16 to be inserted into the reserved volume of the core 10 and thus into the space of the cavity 9 that will become the tire 2 before the tire 2 is formed, in a distribution and arrangement that substantially or even completely corresponds to the distribution and arrangement of the support member within the finished tire 2 to be mounted on the rim, such that when the core 10 is removed, the support member 16 is properly held in the desired position within the cavity 9 and remains rigidly connected to the tire 2. Therefore, the use of the core 10 according to the invention ensures that the tire 2 has a well-controlled construction that is repeatable from one tire 2 to another.

[0073] Furthermore, during the laying of the components that form the wall 8 of the tire, the support 16 is thus concealed in the channel 15 of the core 10, thereby eliminating the risk of accidental movement, pulling out or damage to the support 16 during the manufacture of the wall 8 of the tire 2.

[0074] In an absolute sense, it is conceivable that all or part of the core 10, particularly the portion of the core 10 that temporarily fills the cavity 9 of the tire and defines the channel 15, is made of a material that is soluble, fusible, evaporable (sublimable), or otherwise decomposable without damaging the tire 2, such that after the tire 2 is manufactured and cured, said portion of the core can be broken off according to instructions and discharged in the form of fluid or fine particles during demolding without damaging the tire 2 or, in particular, the support 16. Thus, a core 10 that can be used to form a partially or completely disappearing model by analogy to casting, and is replaced in each manufacturing cycle, is particularly convenient for demolding. Within such a core forming a partially or completely disappearing model, the channel 15 may optionally have a tubular shape, the transverse cross-section of which is closed around the support 16 at least over a portion of the free length of the support or even over the entire free length of the support 16 (i.e., from the lateral anchor point 18 to the crown anchor point 17).

[0075] However, particularly preferably, the channel 15 is arranged in a demoldable open shape, thereby enabling the production of a permanent, reusable core 10. After the tire 2 is made, the core 10 can be removed from the tire 2 without damaging the support 16, and then the core 10 can be reused to manufacture the next tire.

[0076] Therefore, the channel 15 for the support 16 is preferably formed by a groove 15, which is hollowed out from the receiving surface 10_out in the thickness of the reserved volume, such that the groove 15 has a continuous opening along the contour of the receiving surface 10_out from the crown region 11 to the associated lateral regions 12, 13.

[0077] Advantageously, since each groove 15 forms a slotted opening on the receiving surface 10_out, which extends along the entire length of the receiving surface 10_out from the lateral anchor point 18 of the associated support 16 to the crown anchor point 17 of the support 16, the support 16 can be easily added into the channel before the components forming the wall 8 of the tire 2 are laid out by sliding the support 16 into the groove 15 from the outside of the core 10, such that the support passes through the receiving surface 10_out toward the central axis Z10 of the core and sinks into the reserved volume.

[0078] Advantageously, after the components forming the wall 8 of the tire 2 are laid onto the receiving surface 10_out such that the wall 8 covers the groove 15, the core 10 can be removed from the inside of the tire 2, thereby gradually exposing the support 16 now fixed to the wall 8 and thus integrated into the tire 2 by disengaging the opening of the groove 15 of the core, thereby leaving the support 16 in its permanent position in the cavity 9 of the tire 2.

[0079] For ease of description and to avoid making the figures appear cluttered, the channels 15 for the support 16 and the grooves 15 forming the preferred specific shape of the channels 15 for the support 16 will be indicated by the same reference numeral 15.

[0080] Preferably, such as from Figure 4C , Figure 5C , Figure 6C , Figure 7C , Figure 8C , Figure 9C , Figure 11C , Figure 12C , Figure 13C , Figure 14C , Figure 15B , Figure 18A , Figure 20A , Figure 21A and Figure 24 As can be seen in particular, the groove 15 is a blind groove, that is, the groove 15 has a solid bottom 19 located below the receiving surface 10_out in the reserved volume. The solid bottom 19 extends from a first opening of the groove 15 to a second opening of the groove 15. The first opening leads to the lateral regions 12 and 13 of the receiving surface 10_out, and the second opening leads to the crown region 11 of the receiving surface 10_out.

[0081] Therefore, when the support 16 is properly positioned in the groove 15, the support 16 is radially located (more specifically, radially contained) between the bottom 19 and the opening of the groove 15 on the receiving surface 10_out relative to the central axis Z10 of the core. The support 16 may be separated "above" the bottom 19, i.e., located at a non-zero radial distance from the bottom 19, beyond the bottom 19 relative to the central axis Z10, or may rest against the bottom 19, which will advantageously guide and support the support 16 during the manufacturing process of the tire 2.

[0082] Preferably, the depth of the channel 15 (more particularly the depth of the groove 15 relative to the receiving surface 10_out, and therefore more particularly the distance between the bottom 19 of the groove 15 and the receiving surface 10_out) is sufficient such that each of the channels 15 allows the support 16 to follow a specific path within the channel 15, the path being a straight segment that directly connects the lateral anchor point 18 to the crown anchor point 17. Thus, the support 16 can employ its functional construction within the channel 15 (here, within the groove 15) without interfering with or being deformed or deviated from the channel 15. According to this functional construction, the support 16 forms a chord that connects the ends of the arc formed by the tire wall 8 between the lateral anchor point 18 and the crown anchor point 17 via the shortest path, such that once the tire 2 is released from the core 10, the support 16 can function effectively with tension between the lateral anchor point 18 and the crown anchor point 17 like a tie rod.

[0083] Of course, the channel 15 (here, the groove 15) will be distributed in the azimuth angle around the central axis Z10 with a repeating angular pitch P16 as required by the support 16 described above (e.g., with a constant repeating angular pitch P16 equal to 1.5 degrees), preferably evenly distributed.

[0084] The width W15 of the groove 15 is preferably selected based on a trade-off between the following two aspects: i) taking into account the width (diameter) of the support 16, a certain functional gap needs to be provided between the support 16 and the sidewall defining the groove 15, which is sufficient to allow the support 16 to be inserted into the groove 15, and then the core 10 can be removed from the tire 2, and thus the support 16 can be removed from the groove 15 without jamming or damaging the support 16; ii) maintaining a sufficiently narrow opening and groove width W15 to avoid weakening the core 10 and to provide high-quality support for the components of the tire 2 laid on the receiving surface 10_out, and to limit the material of the components forming the tire 2 from seeping into the groove 15 as much as possible, thereby limiting the deformation or creep of the material.

[0085] Therefore, the width W15 of the groove 15 (particularly the width of the opening of the groove 15 on the receiving surface 10_out) is preferably between 1.01 and 1.5 times the corresponding dimension of the transverse cross-section of the support 16, more preferably the maximum dimension of the transverse cross-section of the support. In practice, if the support is formed of a single-strand or multi-strand wire with a substantially circular cross-section, the dimension of the transverse cross-section of the support under consideration is the diameter of the circular cross-section of the wire.

[0086] Preferably, for the same reason, especially if it is assumed that the cross-section of the support 16 has a diameter between 0.25 mm and 2 mm, for example about 1 mm, the groove width W15 (especially the groove width W15 at the opening of the receiving surface 10_out) is selected to be between 0.1 mm and 3 mm, preferably between 0.3 mm and 2.2 mm, for example between 1 mm and 1.8 mm.

[0087] Preferably, all grooves 15 in a single hemisphere of the core 10 have the same width W15; more preferably, all grooves 15 in the core 10 have the same width W15.

[0088] According to one possible implementation, the groove 15 is formed along a radial plane containing the central axis Z10, as shown below. Figures 4A to 4C , Figures 6A to 6C , Figures 7A to 7C , Figures 8A to 8C , Figures 9A to 9C , Figure 10 , Figures 20A to 20F , Figures 21A to 21C and Figure 23 In this case, a support member 16 extending along the radial plane can be placed inside the tire 2, such as... Figure 1A and Figure 1B The condition of the tires.

[0089] Therefore, each groove 15 is contained within a radial plane that forms the sagittal meridian plane of the groove 15, intersecting the midpoint of the azimuth sector occupied by the groove. The sagittal meridian planes of two adjacent grooves 15 are angularly separated from the sagittal meridian plane of the associated groove 15 by a certain value equal to the repeating angular pitch P16 of the groove 15, and thus ultimately equal to the repeating angular pitch P16 of the support member.

[0090] If applicable, each groove 15 according to this arrangement can be generated by sawing centered on and parallel to the sagittal meridian plane of the groove, wherein the sawing has a constant width equal to the desired width W15 of the groove 15.

[0091] According to another possible implementation, the trenches 15 are intersecting, forming a grid on the receiving surface 10_out, as shown below. Figures 5A to 5C , Figures 11A to 11C , Figures 12A to 12C , Figures 13A to 13D , Figures 14A to 14D , Figures 15A to 15C , Figure 17 , Figure 18A and Figure 18B , Figure 19 as well as Figures 22A to 22C In this case, cross-shaped support members 16 can be installed inside the tire 2, such as... Figure 2A and Figure 2B The condition of the tires.

[0092] By analogy and for ease of description, although the receiving surface 10_out forms an undevelopable surface (oblique curved surface), and is therefore a non-flat surface, the grid cells (i.e., basic cells or "blocks", which are basically long oblique rectangles (i.e., basically rhomboids) formed on the receiving surface 10_out by the openings of the intersecting grooves 15) can be represented as "quadrilaterals", and the material pillars of the core 10 retained between the continuous intersecting grooves 15 can be represented as "prisms" 20, the bases of which correspond to the quadrilaterals described above, and their surfaces form the sidewalls defining the grooves 15.

[0093] According to the preferred feature that is applicable regardless of the nature and shape of the channel 15 used for the support (but this feature is particularly advantageous if the channel 15 used for the support is formed by a groove 15), the core 10 includes an assembly of a plurality of annular sub-assemblies 21, 22, 23 (as from... Figure 4A , Figure 4C , Figure 5A , Figure 5C , Figure 6A , Figure 6C and Figure 23 (As can be seen in the image), the components include:

[0094] i) A first annular sub-assembly 21, referred to as the “center ring” 21, forms the central portion of the crown region 11 of the receiving surface 10_out, said central portion of the crown region 11 being adapted to receive one or more components forming the crown 3 of the tire 2.

[0095] ii) A second annular subassembly 22, referred to as “left lug” 22, is axially adjacent to the central ring 21. The left lug 22 includes a first lateral region 12 receiving a surface 10_out and a portion of the crown region 11 extending axially from the central portion of the crown region 11 on the corresponding side of the central ring 21. The left lug 22 also includes a groove 15 forming a channel for a support 16 that connects the first sidewall 6 of the tire to the crown 3 of the tire.

[0096] iii) A third annular subassembly 23, referred to as “right lug” 23, is axially adjacent to the central ring 21. On the side of the central ring 21 opposite to the side receiving the left lug 22, the right lug 23 includes a second lateral region 13 receiving the surface 10_out and a portion of the crown region 11 extending axially from the center portion of the crown region 11 on the corresponding side of the central ring 21. The right lug 23 also includes a groove 15 forming a channel for a support 16 that connects the second sidewall 7 of the tire to the crown 3 of the tire.

[0097] The left lug 22, the central ring 21, and the right lug 23 are coaxial and centered on the central axis Z10.

[0098] The terms “left” and “right” are used for ease of description, with the sole purpose of distinguishing lugs 22 and 23 when necessary, and certainly not to predetermine the mounting orientation of tire 2 on the rim and / or vehicle in any way.

[0099] Preferably, the center ring 21 is not provided with channels 15 for the support member 16, so the center ring 21 can preferably have a gapless outer surface that forms an annular central island separating the corresponding grooves 15 of the left lug 22 and the right lug 23. Advantageously, such an arrangement facilitates demolding and also allows the support member 16, partially located outside the center ring 21 and thus radially outside the core 10, to be transferred on the receiving surface 10_out of the component receiving the tire wall 8. This facilitates the easy integration of the corresponding portion of the support member 16 into the wall 8 and thus ensures that the support member is anchored in the tire crown 3 of the tire 2.

[0100] Preferably, the crown portion of the central ring 21 is formed into a perfect cylinder with a circular base centered on the central axis Z10.

[0101] Furthermore, preferably, the equatorial plane P_EQ is contained within the axial range covered by the central portion of the crown region 11 of the central ring 21, and more particularly located in the middle of the axial range, thereby subdividing the central portion of the crown region 11 (more generally the central portion of the central ring 21) into two parts that are equivalent to or even symmetrical to each other with respect to the equatorial plane P_EQ.

[0102] Within the cross-section of the radial plane, lugs 22 and 23 have a convex outer contour that provides a curved transition between the crown region 11 of the receiving surface 10_out and the corresponding lateral regions 12 and 13. The curvature of this convex outer contour follows the curvature of the hollow cavity 9 of the tire 2, and more particularly follows the curvature of the inner surface 8_in of the tire wall 8 at the transition between the crown 3 and the sidewalls 6 and 7, and in the region where the wall 8 forms the outermost axial point of the sidewalls 6 and 7. Lugs 22 and 23 thus form lobes that, during the manufacture of the tire 2, can occupy the hollow cavity 9 of the tire 2, temporarily filling the hollow and thus shaping it.

[0103] In this respect, it will be noted that due to the concavity of the cavity 9 and the axial narrowing formed by the bead 4, 5 relative to the sidewall 6, 7, the bead 4, 5 and the lugs 22, 23 are radially aligned, such that the lugs 22, 23 form the part of the core 10 that cannot be demolded in strictly radial removal movement.

[0104] As described above, to simplify the demolding process, disposable left lug 22 and / or right lug 23 can be used. These lugs 22 and / or right lug 23 are made of materials with soluble, fusible, and sublimable properties, thereby allowing the disappearing portion forming the core 10 to be replaced in each new cycle of tire 2 manufacturing. Such disappearing portions can be mounted on a reusable center ring 21.

[0105] However, like the center ring 21, the lugs 22 and 23 are preferably reusable from one manufacturing cycle to another, and for this purpose are made of durable materials such as aluminum alloys.

[0106] To this end, a tool 1 is provided for removing the core 10 from the inside of the tire 2, and more particularly for removing the sub-assemblies 21, 22, 23.

[0107] Preferably, such as from Figure 3A , Figure 4A , Figure 5A , Figure 6A and Figure 10Specifically, it can be seen that the annular sub-assemblies 21, 22, and 23 (i.e., the central ring 21, the left lug 22, and the right lug 23) are each angularly divided into sector areas 24, 25, 26, 27, 28, and 29 around the central axis Z10 in an azimuth angle. The sector areas referred to as "locking parts" 24, 26, and 28 alternate with the sector areas referred to as "arched sections" 25, 27, and 29. The locking parts 24, 26, and 28 are designed to be radially accessible from the inside and are removed first when disassembling the relevant sub-assemblies 21, 22, and 23. The arched sections 25, 27, and 29 are supported and locked in place by the locking parts 24, 26, and 28 and are designed to become movable after being released by the removal of the locking parts 24, 26, and 28.

[0108] As from Figure 3A and Figure 3B As can be clearly seen, the central ring 21 is therefore subdivided into multiple annular locking parts 24 and annular arched sections 25.

[0109] The number of annular locking portions 24 (which is equal to the number of annular arched sections 25) is chosen to be sufficient to allow for easy disassembly and removal by radially removing the fan-shaped areas 24, 25 forming the central ring 21, and the number is also moderate enough to avoid an excessive number of fan-shaped areas 24, 25, thereby simplifying the assembly of the sub-assemblies 21 forming the central ring 21. Therefore, as Figure 3A and Figure 3B In this case, the number of annular locking portions 24 and therefore the number of annular arched sections 25 are preferably between 4 and 6, more preferably equal to 5.

[0110] For standardization and ease of assembly, all annular locking parts 24 are preferably identical and therefore interchangeable. Similarly, all annular arched sections 25 are preferably identical and therefore interchangeable.

[0111] Preferably, the side surfaces defining each annular locking portion 24 and forming the parting line of the annular locking portion 24 and the two annular arched segments 25 (which are adjacent to the annular locking portion 24) are parallel to each other and parallel to the sagittal meridian plane of the associated annular locking portion 24. In a preferred variant, each of the side surfaces forms a non-zero cone angle relative to the sagittal meridian plane, preferably between 1 and 2 degrees, for example, equal to 1.5 degrees, such that the tangential planes formed by the two side surfaces are trumpet-shaped as they radially approach the central axis Z10, i.e., obliquely away from each other and each away from the sagittal meridian plane, forming an opening angle between the tangential planes, which is equal to the sum of the cone angles of the respective side surfaces; here, for example, if the cone angle of each surface is 1.5 degrees, the opening angle is 3 degrees. Whether the side surfaces are parallel (equivalent to zero cone angle) or conical (non-zero cone angle), this arrangement advantageously allows the annular locking part 24 to be removed radially and centripetally relative to the annular arched sections 25 on both sides of the annular locking part 24. In the strict case of perfectly parallel side surfaces, the removal is performed by sliding the annular locking part 24 "plane to plane" relative to the annular arched sections 25 on both sides, while in the case of conical side surfaces, there is a slight misalignment.

[0112] Of course, the circum-arched section 25 forms a fan-shaped area complementary to the annular locking portion 24, and is locked in place within the annular sub-assembly 21 forming the central ring 21 by the annular locking portion 24. Similar to the construction field, the annular locking portion 24, positioned and secured by a common support (not shown), thus prevents the collapse of the circum-arched section 25, and more generally prevents the arc-shaped collapse formed by the successive locking portions 24 and the arched section 25. The larger the cone angle of the side surface of the annular locking portion 24, the stronger and more stable the support provided by the annular locking portion 24.

[0113] In order to remove the center ring 21 from the tire 2 during the demolding operation, the annular locking part 24 is first removed by a radial removal movement followed by an axial disengagement movement, which releases the annular arch section 25. Then, the annular arch section 25 is removed by a radial removal movement followed by an axial disengagement movement.

[0114] In order to allow the annular locking portion 24 and the subsequent annular arched section 25 to be radially removed relative to the lugs 22 and 23 while the lugs 22 and 23 remain in the cavity 9 of the tire 2, the center ring 21 preferably includes a first conical surface 32 supporting the left lug 22 and a second conical surface 33 supporting the right lug 23 on both sides of the central portion of the crown region 11.

[0115] As from Figure 4C , Figure 5C , Figure 6C and Figure 24 As can be seen, the first conical surface 32 and the second conical surface 33 preferably form a first inclined surface 32 and a second inclined surface 33, respectively. They are closer to the central axis Z10 in the radial direction than the channel 15 for the support member 16, and they together form a convex profile with the central portion of the crown region 11 in the cross section of the radial plane containing the central axis Z10.

[0116] Within the assembled core 10 for constructing the tire 2, a central ring 21 is contained in a space arranged radially back from the support 16 and from the lugs 22, 23. The fan-shaped areas 24, 25 of the central ring 21 can be radially removed after the tire 2 has cured and while the lugs 22, 23 are still confined within the tire 2, without disturbing the lugs 22, 23 which are still in place within the cavity of the tire 2.

[0117] To prevent excessive friction between the wall of the groove 15 and the support 16, or to prevent the support from being pulled out during the removal of the lug sector areas 26, 27, 28, 29 (more particularly during the removal of the lug locking parts 26, 28), each of the lug sector areas 26, 27, 28, 29 covers a angular sector area around the central axis Z10. This angular sector area is relatively small but large enough to limit the number of lug sector areas 26, 27, 28, 29 assembled to prepare each lug 22, 23.

[0118] Furthermore, for standardization and ease of assembly, it is preferable that each lug locking part 26, 28 of lugs 22, 23 occupies a angular sector area A26, the value of which is an integer divisor of 360 degrees, and the value of which is preferably equal to the value of the angular sector area occupied by the other locking parts 26, 28 of the same lug.

[0119] Similarly, each arched segment 27, 29 of lugs 22, 23 preferably occupies a angular sector A27, the value of which is an integer divisor of 360 degrees, and the value of which is preferably equal to the value of the angular sector occupied by the other arched segments 27, 29 of the same lug 22, 23.

[0120] Preferably, such as from Figure 10 It can be seen in particular that the angular sector A26 covered by each lug locking part 26, 28, which is considered relative to the central axis Z10 and at the radial outermost height of the receiving surface 10_out of the relevant lug locking parts 26, 28, is preferably equal to or greater than 9 degrees, and preferably less than or equal to 36 degrees, more preferably equal to or less than 24 degrees, and even more preferably equal to or less than 18 degrees.

[0121] In an absolute sense, the angular sector A26 can be set to 9 degrees, 15 degrees, 18 degrees or even 24 degrees, but considering the envisioned size of the tire 2, and more particularly the corresponding maximum diameter of the receiving surface 10_out, and considering the selected repeating angular pitch P16 (preferably 1.5 degrees), a value of 9 degrees is preferred.

[0122] Similarly, at the maximum diameter of the receiving surface 10_out, the angular sector A27 covered by each lug arched segment 27, 29 is preferably equal to or greater than 9 degrees, and preferably less than or equal to 36 degrees, more preferably equal to or less than 24 degrees, and even more preferably equal to or less than 18 degrees, for example selected from 24 degrees, 18 degrees, 15 degrees and more preferably 9 degrees.

[0123] Preferably, especially in order to simplify the fastening of the fan-shaped areas 26, 27, 28, 29 of the lugs to the central ring 21, the fan-shaped area division of the left lug 22 is the same as that of the right lug 23 and coincides in azimuth angle, such that each locking part 26 of the left lug 22 is arranged to face the locking part 28 of the right lug 23 and overlaps with it angularly in the projection of the equatorial plane P_EQ. Similarly, each arched section 27 of the left lug 22 is arranged to face the corresponding arched section 29 of the right lug 23 and overlaps with it angularly.

[0124] It should be noted that arbitrarily implementing angular sector regions A26 and A27, each at 36 degrees, will make the angular division of lugs 22 and 23 completely consistent with the angular division of the central ring 21.

[0125] Furthermore, independent of or in combination with the absolute values ​​of the aforementioned angular sector regions A26, A27, and especially taking into account the value of the repeating angular pitch P16 conceived for the support member 16 and therefore for the groove 15, the number of grooves 15 in each lug locking portion 26, 28 and lug arched sections 27, 29 is thus limited, in particular making it possible to simultaneously detach the lug locking portions 26, 28 from all the support members 16 they contain without damaging the support members, which, where appropriate, takes advantage of the certain flexibility and / or relatively relaxed state of the support members 16 after the curing operation.

[0126] For example, such as Figure 7B , Figure 9B and Figure 10 As shown, for the arrangement of the grooves 15 along the radial plane, each lug locking part 26, 28 preferably has 5 to 23 grooves 15, each lug locking part 24 preferably has 5 to 9 grooves, and each lug locking part 26, 28 more preferably has 7 grooves.

[0127] like Figure 8B and Figure 10As shown, the corresponding lug arched sections 27 and 29 can preferably have between 3 and 21 grooves 15, more preferably between 3 and 7 grooves 15, for example, 5 grooves 15.

[0128] exist Figure 10 In the example, 20 lug locking portions 26 and 20 cooperating lug arch sections 27 are used to form lugs 22 and 23. Each locking portion 26 occupies an angular sector A26 with a value of 9 degrees and each locking portion 26 is provided with seven grooves contained in the radial plane. Each arch section 27 occupies an angular sector A27 with a value of 9 degrees and each arch section 27 is provided with five grooves contained in the radial plane. The side wings 40 and 41 of the lug locking portions 26 are parallel to each other and parallel to the sagittal meridian plane P_MER_26 of each associated lug locking portion 26, while the side wings 42 and 43 of the lug arch sections 27 form an angle of 18 degrees, and the side wings 42 and 43 each form an angle of 9 degrees relative to the sagittal meridian plane P_MER_27 of the associated lug arch section 27.

[0129] If trench 15 is inclined and intersecting, such as Figure 11B , Figure 12B , Figure 13B and Figure 14B In the case described above, each lug sector 26, 27, 28, 29 (each lug locking portion 26, 28 and each lug arch section 27, 29) can be provided with four to eight groove 15 inlets (corresponding to the same number of lateral anchor points 18), more preferably six groove 15 inlets, as described above. Figure 11B , Figure 12B , Figure 13B and Figure 14B As shown, each sector includes three groove 15 inlets tilted to the left (i.e., counterclockwise) in projection onto a plane perpendicular to the central axis Z10, and three groove inlets tilted to the right (i.e., clockwise) in projection onto the same plane perpendicular to the central axis Z10.

[0130] Preferably, the lug locking portions 26 and 28 are identical and interchangeable at least within a single lug 22, or even interchangeable between one lug 22 and another lug 23.

[0131] Similarly, the lug arch sections 27 and 29 are preferably identical and interchangeable at least within a single lug 22, or even interchangeable between one lug 22 and another lug 23.

[0132] Preferably, the lug arched sections 27 and 29, more preferably only the lug arched sections 27 and 29 (not the lug locking portions 26 and 28) are fastened to the central ring 21 by screws, and more particularly to the conical surfaces 32 and 33, from Figure 3A , Figure 3B , Figure 4A , Figure 4C , Figure 5A , Figure 5C , Figure 6A and Figure 6C As can be seen, these screws are inserted radially and centrifugally from the empty interior space of the central ring 21 to engage with the radial inner surfaces of the lug arched sections 27, 29 and the through holes 34 in the central ring 21.

[0133] As from Figure 7A , Figure 9A and Figure 11A As can be seen, the lug locking portions 26 and 28 can interact with the lug arched sections 27 and 29 and are thus positioned and held by pins, which engage in pin holes 35 provided in the locking portions 26 and 28, as shown. Figure 8A and Figure 21B As shown, the pin engages with the corresponding groove 36 provided in the lug arch sections 27, 29.

[0134] As from Figure 13A , Figure 13D , Figure 15A and Figure 15C As can be seen, as a variant, the lug locking portions 26 and 28 can be provided with a tenon 37, which is adapted to engage with a mortise 38 provided in the arched sections 27 and 29 of the lug (as shown in the image). Figure 14A The interaction can be seen in the image.

[0135] Preferably, the lug sector regions 26, 27, 28, and 29 (lug locking portions 26, 28 and lug arched sections 27, 29) are made of a metal alloy, more preferably of an aluminum alloy, thereby providing satisfactory rigidity and thermal conductivity, and relatively low thermal inertia. If intersecting grooves 15 are implemented, the lug sector regions 26, 27, 28, and 29 can preferably be made of a metal material stronger than aluminum (e.g., maraging steel) to improve the strength of the prism 20.

[0136] Preferably, the lug sector regions 26, 27, 28, and 29 are manufactured by additive manufacturing, which simplifies the manufacturing of relatively complex geometries.

[0137] According to one possible implementation, the flanks 40, 41 of at least one lug locking portion 26, 28 are parallel to an imaginary plane referred to as the "sagittal meridian plane" P_MER_26. The flanks 40, 41 define an angular sector A26 occupied by the lug locking portions 26, 28 in an azimuth angle around the central axis Z10 and thus form a parting line PJ. The lug locking portions 26, 28 interact along the parting line PJ within the annular subassemblies 22, 23 (i.e., within the corresponding lugs 22, 23 in the assembled state) with the lug arch sections 27, 29 adjacent to the lug locking portions 26, 28. The sagittal meridian plane P_MER_26 corresponds to a radial plane containing the central axis Z10 and intersects the midpoint of the angular sector A26 occupied by the respective lug locking portions 26, 28, as shown from... Figure 7B , Figure 9B , Figure 10 and Figure 11B As can be seen, the side wings 40, 41 allow the lug locking portions 26, 28 to be removed from the adjacent lug arched sections 27, 29 by sliding and / or tilting along the parting line PJ, as... Figures 20A to 20D , Figure 21A and Figure 21B As shown.

[0138] The sagittal meridian plane P_MER_26 subdivides the arc of the outermost radial boundary of the relevant lug locking parts 26, 28 into (and thus subdivides the arc of the outermost radial boundary of the portion of the receiving surface 10_out belonging to the lug locking parts 26, 28 in the projection on the plane perpendicular to the central axis Z10 into) two equal semi-arcs, which are contained by adjacent half-angle sectors with the same azimuth coverage and equal to A26 / 2.

[0139] The flanks 42 and 43 of the lug arched sections 27 and 29 are preferably formed by planes oriented in a direction that matches the direction of the flanks 40 and 41 of the lug locking parts 26 and 28 on both sides of the sagittal meridian plane P_MER_27 of the relevant arched sections 27 and 29.

[0140] Within lugs 22 and 23, lug locking portions 26 and 28 and lug arched sections 27 and 29 are thus flat against each other. This allows lug locking portions 26 and 28 to have three potential degrees of freedom relative to lug arched sections 27 and 29: two translational degrees of freedom in the two tangential directions defining the parting line PJ (typically the axial and radial directions), and one rotational degree of freedom about an axis perpendicular to the parting line PJ (therefore, about an axis corresponding to the direction vector in the circumferential direction). This rotational degree of freedom allows the locking portions to tilt, such as... Figure 20D , Figure 20E , Figure 21B and Figure 21C As shown.

[0141] It should be noted that this arrangement of lug locking portions 26, 28 with flat parallel side wings 40 and 41 can be achieved in the groove 15 arranged along the radial plane. Figure 7A , Figure 7B , Figure 7C , Figure 9A , Figure 9B , Figure 9C , Figure 10 and Figure 23 In the case of (in which case the sagittal meridian plane P_MER_26 of the lug locking portions 26, 28 preferably coincides with the sagittal meridian plane of the groove 15), it can also be implemented in the intersecting oblique groove 15 ( Figure 11A , Figure 11B , Figure 11C This can be implemented under the condition that the shape of the trench 15 is appropriate.

[0142] According to one possible implementation, the grooves 15 in the individual lug sector regions 26, 27, 28, and 29 are each defined by the following two sidewalls: these two sidewalls are generated in the axial generation direction DG_A, which is vectorarily collinear with the central axis Z10, i.e., parallel to the central axis Z10, as shown below. Figure 7A , Figure 8A , Figure 9A and Figure 10 Variant forms (including groove 15 contained in the radial plane), and Figure 11A and Figure 12A Variant forms (including intersecting inclined grooves 15).

[0143] Alternatively, according to a possible implementation similar to the aforementioned embodiment (equivalent to using a generation direction that is substantially parallel but not completely parallel to the central axis Z10), the grooves 15 in the individual lug fan regions 26, 27, 28, 29 are each defined by the following two sidewalls: these two sidewalls form a conical surface that flares out from the bottom 19 of the groove 15 toward the receiving surface 10_out, thereby opening a free space throughout the interior of the relevant groove 15. This free space contains an imaginary volume referred to as the "necessary gap volume," which is generated by virtually moving the relevant support 16 along a virtual departure track (here, from the position of the support 16 near the bottom 19 of the groove 15 to the receiving surface 10_out). This virtual departure track is contained in an axial generation direction DG_A, which is vectorarily collinear with, i.e., parallel to, the central axis Z10.

[0144] In both cases, i.e., whether the sidewalls of groove 15 are formed in a strictly axial generation direction DG_A or in a generally axial (conical) generation direction DG_A, this arrangement of the sidewalls means that groove 15 allows for axial removal of the relevant lug fan-shaped areas 26, 27, 28, 29 by an axial removal movement M_A parallel to the central axis Z10 and toward the equatorial plane P_EQ of the core 10, as shown. Figure 20B , Figure 20C and Figure 21A As shown, the sidewalls of the groove 15 will not interfere with the support 16 during the axial removal movement M_A.

[0145] If the support 16 installed in the individual lug sector 26, 27, 28, 29 is removed in a straight line, that is, if the support 16 is removed from the groove 15 by a linear translational movement along the axial generation direction DG_A on the relevant lug sector 26, 27, 28, 29, the support 16 is moved through a volume corresponding to the aforementioned necessary clearance volume. The lateral boundary of this volume defines a straight edge of the envelope surface parallel to the axial generation direction DG_A. Within this envelope surface, the material block defining the groove 15 must not penetrate to avoid obstructing removal. Therefore, if the sidewall of the trench 15 is not parallel to the axial generation direction DG_A, or if the sidewall is not flared relative to the generation direction DG_A to form a tapered surface that spreads out toward the receiving surface 10_out, the sidewall will interfere with the gap volume. As a result, the sidewall of the trench 15 will form an obstacle. During the removal process, the obstacle will collide with the support 16, thereby generating a lateral thrust through the ramp effect. This lateral thrust will cause the support 16 to deviate from the desired position and may damage or even break the support 16.

[0146] Of course, regardless of the arrangement chosen for the sidewalls of the trench, the width W15 of the trench (corresponding to the distance between the two sidewalls that define the relevant trench 15) has the aforementioned proportions and / or dimensions, and therefore can be particularly between 0.1 mm and 3 mm.

[0147] According to one possible implementation, when the lugs 22, 23 of the core 10 are subdivided into sector areas 26, 27, 28, 29 by angle, and the channel 15 for the support is formed by intersecting grooves 15, the intersecting grooves 15 in each lug sector area 26, 27, 28, 29 can each be defined by the following two sidewalls: these two sidewalls are generated in the oblique generation direction DG_O, such as... Figures 13A to 13D , Figures 14A to 14D , Figures 15A to 15C , Figure 17 , Figure 18A , Figure 19 and Figures 22A to 22CIn the case described above, the oblique generating direction DG_O is contained within a radial plane called the "sagittal meridian plane" P_MER_26, P_MER_27, which intersects the middle of the relevant lug sector regions 26, 27, 28, 29. In the sagittal meridian plane P_MER_26, P_MER_27, the oblique generating direction DG_O converges towards the central axis Z10 along a direction from the relevant lugs 22, 23 toward the opposite lugs 23, 22 and forms an angle A44 with the central axis Z10 (called the "co-latitude angle" A44). This angle A44 is not zero and is strictly less than 90 degrees, preferably between 30 degrees and 50 degrees, for example between 40 degrees and 47 degrees, for example equal to 45 degrees.

[0148] Advantageously, the oblique generation direction DG_O is therefore oriented toward the equatorial plane P_EQ and "tilted" toward the opposite lugs 23, 22, thus allowing the oblique removal movement M_O to remove the associated lug fan-shaped areas 26, 27, 28, 29, which are oriented toward the interior of the core 10 and simultaneously include an axial component and a radial component.

[0149] Therefore, it is important to note that the absolute value of the selected coaxial angle A44 should be equal to or less than the angle formed by the tangent T4 of the inner surface 8_in of the tire wall 8 at the bead 4 in the sagittal meridian planes P_MER_26 and P_MER_27 (considering the point where the bead 4 forms the most obvious undercut), so that the orientation of the tangent T4 relative to the central axis Z10 defines the "demolding threshold," i.e., the maximum coaxial angle that the oblique removal movement M_O can have, so that the relevant lug fan areas 26, 27 can be demolded by sliding along the inner surface of the bead 4 without being blocked by the bead 4. Therefore, it is not necessary to force the bead 4 and the corresponding sidewall 6 of the tire 2 to retract (open) during the demolding operation. Figure 22A , Figure 22B and Figure 22C As shown. Of course, the considerations applicable to the left lug 22 can be modified as necessary to apply to the right lug 23.

[0150] It should also be noted that, if it is possible Figure 13A and Figure 13C respectively with Figure 11A and Figure 11CIt is quite clear in comparison that, advantageously, the sidewalls of the intersecting groove 15 are generated in the oblique generating direction DG_O, which is closer to the bottom 19 of the groove 15 than the axial direction. This allows the height of the prism 20 (or strut) relative to the axial generating direction DG_A, which forms the wall of the intersecting groove 15 and extends between the bottom 19 of the groove and the opening of the groove 15 on the receiving surface 10_out. Therefore, the prism 20, and consequently the lug fan regions 26, 27, 28, 29, are more rigid and robust.

[0151] When an embodiment in which the sidewalls of the groove 15 are generated in the oblique generation direction DG_O are selected, the side wings 40, 41 of the relevant lug locking portions 26, 28 and thus the parting line PJ can preferably be generated in the oblique generation direction DG_O based on the basic profile 45, i) according to the first alternative, the basic profile 45 corresponds to the intersection line 46 of the receiving surface 10_out and the radial planes P1, P2, the radial planes P1, P2 being angularly offset relative to the sagittal meridian plane P_MER_26 of the lug locking portions 26, 28, such that the basic profile 45 passes through the relative vertices of the grid cells (i.e., the bottom surface of the aforementioned prism 20), and thus in this case through the relative vertices of the quadrilaterals defined on the receiving surface 10_out by intersecting grooves 15 that continue along the basic profile 45 from the crown region 11 to the lateral regions 12, 13, as shown in the example from Figure 13B , Figure 13D , Figure 14B , Figure 14D , Figure 15A , Figure 16B and Figure 17 As can be seen in; or, ii) according to the second alternative, the basic contour 45 corresponds to the serrated dashed line 47, which is formed on the receiving surface 10_out by alternating edges of grid cells (the bottom surface of the aforementioned prism 20), and thus here by alternating edges of quadrilaterals defined on the receiving surface by intersecting grooves 15 and continuing from the crown region 11 to the lateral regions 12, 13, as shown. Figure 18A , Figure 18B and Figure 19 As shown.

[0152] In both cases, this choice of basic profile 45 advantageously makes it possible to avoid or greatly limit the "deviation" that is, the offset at the parting line PJ between the groove 15 belonging to the lug locking portions 26, 28 and the groove 15 belonging to the lug arched sections 27, 29, wherein the groove 15 belonging to the lug locking portions 26, 28 is located on one side of the parting line PJ, and the groove 15 belonging to the lug arched sections 27, 29 is adjacent to the lug locking portions and located on the other side of the parting line PJ. The reason for these deviations is that the sidewalls of the grooves 15 are generated in the same oblique generation direction DG_O, and are therefore parallel to each other. This causes the grooves 15 in the individual first lug sector regions 26, 27, 28, 29 to not follow a strictly radial circular distribution. Therefore, their ends appearing on the parting line PJ on the receiving surface 10_out do not always coincide with the ends of the grooves 15 in the adjacent lug sector region. The grooves 15 in the first lug sector region must be connected to the grooves 15 in the adjacent lug sector region.

[0153] However, by making a reasonable choice of the basic profile 45, proper connection is ensured, thereby ensuring the continuity of the groove 15 at the intersection with the parting line PJ on the receiving surface 10_out. The groove in a lug sector is thus substantially continuous with the corresponding groove in the adjacent lug sector. This ensures that the support 16 can be easily inserted into the groove 15 substantially radially from the outside of the core 10 through the receiving surface 10_out.

[0154] The following solutions are generally satisfactory and enable the lug locking parts 26, 28 to be securely and precisely installed into the lug arched sections 27, 29: a basic profile 45 is selected along the wall defined by the continuous prism 20, following a dashed line 47 that alternately forms concave and convex angles (e.g., ...). Figure 18A , Figure 18B and Figure 19 (as shown by the dashed line in the diagram); however, a drawback of this solution is that the stripes generated along the parting line PJ can easily cause some grooves 15 on the receiving surface 10_out to widen locally, such as from... Figure 19 As you can see.

[0155] Therefore, the first solution is likely preferred. According to this first solution, the basic profile 45 is curve 46, which is formed on the receiving surface 10_out by the intersection of the radial planes P1, P2 and the receiving surface 10_out, and passes through the vertices of the quadrilaterals along the common diagonal of the continuous quadrilaterals, such as... Figure 13A , Figure 13B , Figure 13D , Figure 14D , Figure 15A and Figure 17 As shown.

[0156] This solution advantageously allows the nodes of the quadrilateral network defined by the intersecting grooves (i.e., nodes formed by the intersection of two grooves) belonging to the relevant lug locking portion 26, and more generally the nodes of the prism 20 network, to coincide with the nodes of the quadrilateral network belonging to the corresponding lug arch section 27 (located on the other side of the parting line PJ). This ensures the continuity of the groove 15 at the connection between consecutive lug sector areas without significantly affecting the width W15 of the groove 15.

[0157] Figures 16A to 16D The geometric principle for generating the basic profile 45 corresponding to the intersection line 46 of the receiving surface 10_out and the radial planes P1 and P2 is shown.

[0158] like Figure 16A As shown, the sagittal meridian plane P_MER_26 of the lug-shaped region (lug locking part 26 in this embodiment) to be defined on the flanks 40 and 41 is first identified. For this purpose, two virtual radial planes P1 and P2 are defined on both sides of the sagittal meridian plane P_MER_26, each radial plane being connected to the sagittal meridian plane P_MER_26.

[0159] The angular distances of the meridian plane P_MER_26 are the same, equal to half the value of the angular coverage area A26 required by the lug sector 26.

[0160] Advantageously, since the value of the angular coverage range A26 is an integer multiple of the repeating pitch P16 of the groove 15, each radial plane P1, P2 can be aligned with the node formed by the vertices of the quadrilaterals shown by the intersecting grooves 15.

[0161] Next, as Figure 16B As shown, consider the basic contour 45 corresponding to curve 46, which forms the intersection line between the toroidal receiving surface 10_out and the radial planes P1 and P2.

[0162] Then, starting from these curves 46, the flanks 40, 41 of the lug sector 26 are generated by translating the curves 46 along the straight oblique generation direction DG_O, which is contained in the sagittal meridian plane P_MER_26 and oriented along the selected colatitude angle A44 such that it is inclined toward the central axis Z10, which intersects the central axis Z10. Figure 16C ).

[0163] In fact, in an equivalent manner, this is equivalent to cutting out the flanks 40 and 41 of the lug sector 26 based on the projection of the basic contours 45 and 46 onto plane P3 perpendicular to the selected oblique generation direction DG_O, as shown below. Figure 16D As shown.

[0164] Furthermore, regardless of the variant embodiments conceived for the lug sector regions 26, 27, 28, and 29, especially when the lug sector region includes intersecting inclined grooves 15 generated along the oblique generation direction DG_O, as the channel 15 (here, the groove 15) for the support member 16 is defined by the sidewall, the core 10 can preferably have a groove 50 on the back side of the sidewall located below the receiving surface 10_out and extending through the channel 15, the groove 50 being different from the channel 15 and separated from it by the sidewall, such as... Figure 15B and Figure 15C As shown.

[0165] The grooves 50 formed in the lug sector areas 26, 27, 28, and 29 lead to the interior of the core 10, and more specifically to the support surfaces of the lug sector areas, which rest against the conical surfaces 32 and 33 of the ring.

[0166] The groove preferably reaches a depth less than the hollow depth of the channel 15 adjacent to the groove, i.e. less than the depth of the bottom 19 of the groove 15, so that the skin of the core 10 aligned with the groove 50 is thinner than the skin aligned with the sidewall of the channel 15.

[0167] This groove 50 allows the lugs 22 and 23 to have a lightweight structure, especially with low thermal inertia, thereby optimizing heat transfer in the central ring 21, which preferably includes a heating element, such as a heating resistor.

[0168] Therefore, according to the preferred features that constitute the present invention, particularly in combination with the fan-shaped angle division of the lugs 22, 23 and / or the center ring 21, a core 10 can be produced in which only the center ring 21, and more particularly the fan-shaped areas 24, 25 of the center ring 21, includes heating elements such as heating resistors, while the lugs 22, 23 are not provided with heating elements. Nevertheless, it is still possible to ensure that the receiving surface 10_out heats up quickly and uniformly during the operation of curing the tire 2.

[0169] Furthermore, according to preferred features that constitute the present invention and are applicable to any of the above variations, particularly when the channel 15 for the support 16 is formed by the groove 15, the tool 1 may include a blocking device 60 that interacts with the core 10 to prevent components forming the tire crown 3, sidewall 6, 7 or bead 4, 5 from penetrating into the channel 15 of the core 10 for engagement of the support 16.

[0170] More specifically, the blocking device 60 prevents materials (especially rubber-based compositions) present in the components of the tire 2 from creeping into the groove 15, thereby preventing the formation of rubber burrs. Rubber burrs would stick the support 16 to the wall of the groove 15 and thus create the risk of pulling the support 16 out when removing the corresponding lug fan-shaped areas 26, 27, 28, 29.

[0171] The blocking device 60 may include shielding elements 61 and 62, which are adapted to form a barrier on the receiving surface 10_out between the components of the tire wall 8 and the openings (here, the openings of the grooves 15) for the support. Of course, the shielding elements 61 should be selected such that they are compatible with the high temperatures (typically greater than 100°C) and high pressures (typically greater than 60 bar) to which the core 10 and tire 2 are exposed during the curing process.

[0172] Flexible strips, such as metal strips (e.g., made of steel), held in place by an adhesive (e.g., tape) can be used to shield the element. After the support 16 is placed in the groove 15, the flexible strip is applied to the receiving surface 10_out to cover the groove 15.

[0173] According to a possible preferred embodiment, the shielding element includes a reusable housing 61, which is made of, for example, a polymer or preferably metal.

[0174] As from Figure 6A , Figure 6B , Figure 6C , Figure 20A and Figure 21A As can be seen, the housing 61 is preferably curved in a C-shape, such that each housing 61 can (preferably integrally) continuously cover the opening of the groove 15 from the lateral regions 12, 13 to the crown region 11 according to the curve of the core 10 (here, the curve of the lugs 22, 23).

[0175] According to the preferred implementation scheme, such as from Figure 6C , Figure 9A , Figure 9B and Figure 9C As can be seen, the lug-shaped fan areas 26, 27, 28, and 29 may include recesses 62, in which the corresponding housing 61 can be mounted and advantageously positioned and held by one or more shoulders. The depth of the recesses 62 is preferably such that the radially outer surface of the housing 61 is flush with the adjacent receiving surface 10_out.

[0176] As from Figure 6AAs can be clearly seen, preferably, for ease of disassembly, an independent housing 61 is provided for each lug sector 26, 27, 28, 29, and the corner sector A26, A27 covered by each housing 61 is the same as the corner sector of the corresponding lug locking part 26, 28 or lug arch section 27, 29 covered by the housing 61.

[0177] Preferably, at least within a single lug 22, and more preferably between two lugs 22, 23, all the housings 61 are identical to each other and can therefore be interchanged.

[0178] Preferably, in addition to the housing 61, the shielding element may also include shielding strips 63 formed of strip material (preferably metal strip material), which can help shield the openings of grooves in the crown region 11 of the receiving surface 10_out, preferably by partially overlapping the housing 61, such as in particular Figure 6A , Figure 6B and Figure 6C As shown. The overlapping portion may extend several millimeters axially, for example, from 3mm to 15mm.

[0179] Dividing the shielding barrier into a housing 61 and shielding strips 63 facilitates demolding, and more particularly facilitates the removal of the housing 61 and shielding strips 63 from the interior of the tire between the supports 16. The overlap between the housing 61 and the strips 63 also advantageously prevents leakage gaps from forming between the two shielding elements.

[0180] As from Figure 6A , Figure 6B and Figure 6C As can be seen, tool 1 preferably includes two sets of housings 61 (located on both sides of the equatorial plane P_EQ) and two strips 63, each strip 63 forming a complete loop around the central axis Z10 and located on one side of the equatorial plane P_EQ.

[0181] Each strip 63 is interrupted axially and does not reach the equatorial plane P_EQ, so that the portion of the crown region 11 formed by the central ring 21 with the crown anchor point 17 is not covered.

[0182] As a variant, in addition to or preferably as a replacement for shielding elements 61 and 63, the blocking device 60 may also include a filling element 65, which is designed to fill any remaining empty gap space in the channel 15 after the support 16 has been placed in the channel 15, thereby substantially sealing the gap space.

[0183] More specifically, the filling element 65 may occupy the free space between the sidewall of the groove 15, the support 16 contained in the associated groove, and the opening of the groove on the receiving surface 10_out.

[0184] Any suitable material that can enter the channel 15 and is dense enough to prevent or significantly slow down the penetration of materials forming tire components (especially unvulcanized rubber-based mixtures) into the groove 15 can be used as filler element 65.

[0185] according to Figure 23 In one exemplary embodiment shown, the filling element may be formed of a rigid gasket 65, which is preferably made of metal and whose shape substantially matches the cavity of the groove 15. The gasket 65 is inserted into the groove 15 after the support 16 is first engaged in the groove.

[0186] Of course, the present invention also relates to a method for manufacturing a supported tire 2 on a core 10.

[0187] In practice, this method preferably means using the tool described above 1.

[0188] Therefore, the present invention also relates to a method of manufacturing a toroidal tire 2, the toroidal tire 2 comprising a crown 3, a first annular bead 4 and a second annular bead 5, and a first sidewall 6 and a second sidewall 7, the crown 3 being adapted to form a tread, the first annular bead 4 and the second annular bead 5 being designed to attach the tire to a mounting support such as a rim, the first sidewall 6 and the second sidewall 7 respectively connecting the crown 3 to the first bead 4 and the second bead 5, the crown 3, the first sidewall 6 and the second sidewall 7 and the first bead 4 and the second bead 5 integrally forming a wall 8 having a concave inner surface 8_in, the concave inner surface 8_in defining a cavity 9 of the tire 2, the tire 2 including reinforcing elements 16 referred to as “supports” 16, each support 16 extending in the cavity 9 of the tire, connecting a crown anchor point 17 located in the crown 3 of the tire to a lateral anchor point 18 located in one of the sidewalls 6, 7 or the beads 4, 5 of the tire.

[0189] The method includes a preparation step (S0) for preparing the tool 1 according to the invention.

[0190] More specifically, in the preparation step (S0), such as Figure 3A and Figure 3B As shown, the annular locking portion 24 and the annular arched section 25 are assembled to form a central ring 21. Then, a series of lug locking portions 26, 28 and lug arched sections 27, 29 are fastened to each conical surface 32, 33 of the central ring 21 to form lugs 22, 23, particularly as shown in the diagram. Figures 4A to 4C and Figures 5A to 5C As shown.

[0191] Next, the method includes the step (S2) of placing the support 16, in which at least one reinforcing wire 70 suitable for forming the support 16 is passed through each channel 15 of the core 10.

[0192] Preferably, a plurality of support members 16 are formed using a single continuous single-strand or multi-strand reinforcing yarn 70, preferably more than 25%, more than 50%, or even all of the support members 16 in the tire 2.

[0193] For this purpose, the continuous reinforcing wires 70 are arranged in a serpentine manner through successive channels 15, which is achieved by inserting the reinforcing wires 70 into the grooves 15 below the receiving surface 10_out, and then bringing the reinforcing wires 70 out from above the receiving surface 10_out in the crown region 11 and the lateral regions 12, 13 at the desired anchor points 17, 18 (e.g., from...). Figure 24 As can be seen in the image, the continuous reinforcing yarn 70 is carried in an integral manner from one lateral region 12 of the core 10 through the crown region 11 to another lateral region 13 (as can be seen from the image). Figure 25 As can be seen in the image, this forms a wavy portion, which has a basically symmetrical amplitude relative to the equatorial plane P_EQ.

[0194] Next, the method includes a filling step (S4), in which components forming the tire crown 3, sidewalls 6, 7 and bead 4, 5 are placed on the receiving surface 10_out to construct the wall 8 of the tire 2.

[0195] The component preferably comprises a rubber-based strip or a rubber-based fabric layer, optionally reinforced with longitudinally reinforcing fibers of fabric, polymer, or metal. Other reinforcing components, such as composite glass fiber and resin strips, may be provided.

[0196] All or part of the components can preferably be laid onto the rotating core 10 by winding.

[0197] Next, the method includes a curing step (S5).

[0198] In this step, the core 10 and the tire 2 held by the core 10 are placed into a curing mold to vulcanize the rubber base component of the tire 2. For this purpose, the temperature of the mold, and more particularly the temperature of the tire, is preferably set to a value between 120°C and 200°C.

[0199] Next, the method includes a demolding step (S6), in which the core 10 is detached from the tire 2, leaving the support 16 in a suitable position within the cavity 9 of the tire 2, particularly as follows: Figures 20A to 20F , Figures 21A to 21C and Figures 22A to 22C The order is shown in the diagram.

[0200] If the components of the core 10 (e.g., lugs 22, 23) are for single use, they can be broken up by appropriate methods (melting, dissolving, crushing, impacting, sublimating, etc.) to release the cavity 9 and the support 16.

[0201] If the core 10 is reusable (preferably) and therefore consists of a modular assembly of removable parts, the parts are gradually disassembled and removed to release the tire 2.

[0202] Preferably, after the preparation step (S0) and before the step of placing the support 16 (S2), the method includes a pre-filling step (S1), in which, as... Figure 24 As shown, anchoring structures 71 and 72 are laid on the lateral regions 12 and 13 of the receiving surface 10_out of the core 10 and the crown region 11, facing the anchor points 18 and 17 provided for attaching the support member 16 to the tire wall 8. The anchoring structures 71 and 72 are designed to receive the ends of the support member 16 exposed from the channel 15 of the core 10 and to adhere to the components forming the sidewall 6, 7 or the bead 4, 5 or the crown 3, respectively. The support member 16 is secured to the provided anchor points 18 and 17 by clamping the ends of the support member 16 between the anchoring structures 71 and 72 and the components.

[0203] Preferably, anchoring structures 71 and 72 are formed of an unvulcanized rubber-based material, which is optionally reinforced by reinforcing filaments or fibers. For example, anchoring structures 71 and 72 may take the form of reinforcing strips or reinforcing rings wound around the core 10.

[0204] After the anchoring structures 71 and 72 are positioned at the desired anchor points 18 and 17 on the receiving surface 10_out outside the groove portion, the support 16 is placed in the channel such that the portion of the support 16 exposed from the channel 15 is located on top of the anchoring structures 71 and 72. Thus, when the components of the tire wall 8 are subsequently laid, the components will adhere to the anchoring structures already in the appropriate position on the core 10, and the anchoring structures 71 and 72 will thus be integrated into the tire wall 8, thereby locking the end of the support 16 into the wall 8 at the set anchor points 18 and 17.

[0205] Preferably, the loops at the extreme ends of the serpentine wavy portion of the continuous reinforcing filament 70 (which thus correspond to the transition region between two continuous supports belonging to a single hemisphere) form the portion of the support 16 that will be held in place by the lateral anchoring structures 71 placed on the lateral regions 12, 13, to form the lateral anchor points 18 of the support. The connection of the continuous reinforcing filament 70, with the middle portion of the two continuous supports 16 belonging to two different hemispheres exposed from the groove 15 of the first support, traverses the crown region 11 of the receiving surface 10_out and crosses the equatorial plane P_EQ, and then returns to the groove 15 of the second support 16, the middle portion of which will be held in place by the crown anchoring structure 72.

[0206] Preferably, after the step (S2) of placing the support member 16, the method includes a protection step (S3) in which a blocking device 60 is used, which interacts with the core 10 in the filling step (S4) and the curing step (S5) to prevent the components forming the tire crown 3, sidewall 6, 7 or bead 4, 5 of the tire 2 from penetrating into the channel 15 (here, the groove 15 where the support member 16 is engaged) of the core 10.

[0207] For example, after the step of installing the support member (S2) and before the filling step (S4), shielding elements as described above, such as housing 61 and / or shielding strips 63, can be applied to the receiving surface 10_out. These shielding elements cover the channel 15, thereby forming a barrier between the channel 15 and the components of the tire wall 8 (e.g., Figure 6A and Figure 6B (as shown), or a filler element 65, such as a spacer 65, can be used. Figure 23 The filling element 65 temporarily fills the empty volume of each channel 15 at least during the curing step (S5) or even during the filling step (S4), the empty volume being between the support 16 engaged with the channel 15 and the opening of the channel 15 on the receiving surface 10_out.

[0208] Preferably, when the core 10 includes a central ring 21, a left lug 22, and a right lug 23, wherein the left lug 22 and the right lug 23 include channels 15 for the support member 16, the channels 15 being in the form of grooves 15 and opening on the receiving surface 10_out, and as described above, each of the central ring 21 and lugs 22, 23 is divided into fan-shaped areas at an angle, these fan-shaped areas forming alternating locking portions 24, 26, 28 and arched segments 25, 27, 29, The demolding step (S6) first includes a sub-step of removing the center ring 21, then a second sub-step of removing the first lug 22, and a third sub-step of removing the other lug 23. In the sub-step of removing the center ring 21, the locking portion 24 of the center ring is removed radially, followed by the removal of the arched section 25 of the center ring to release the lugs 22 and 23, leaving a structure in which the fan-shaped areas 26, 27, 28, and 29 of the lugs 22 and 23 can be contacted from the inside of the tire 2 (as shown in the image). Figure 20A and Figure 22A (As shown); In the second sub-step, the locking portion 26 of one of the lugs 22 (left lug and right lug) is removed from the cavity 9 of the tire 2, and then the arched section 27 of the lug 22 is removed from the cavity 9 of the tire to release the corresponding portion of the cavity 9 and the support 16 located in the corresponding portion of the cavity 9, where the support 16 occupies the first hemisphere of the tire 2; In the third sub-step, the locking portion 28 of the other lug 23 is removed from the cavity 9 of the tire, and then the arched section 29 of the other lug 23 is removed from the cavity 9 of the tire to release the corresponding portion of the cavity 9 and the support 16 located in the corresponding portion of the cavity 9, where the support 16 is located in the second hemisphere of the tire 2.

[0209] It should be noted that the order in which the fan-shaped areas of lugs 22 and 23 are removed can be arbitrarily adjusted. The only requirement is that, within a given lug, the two lug locking parts 26 and 28 on both sides of the arched sections 27 and 29 of the lugs should be removed first, and then the arched sections 27 and 29 of the lugs can be removed in sequence. For example, the following setup could be implemented: first remove the locking part 26 of the first lug 22, then remove the arched section 27 of the first lug 22, then begin removing the locking part 28 of the second lug 23, and continue removing the arched section 29 of the second lug; or first remove the locking part 26 of the first lug 22, then remove the locking part 28 of the second lug 23, then remove the arched section 27 of the first lug 22, and finally remove the arched section 29 of the second lug 23; or even within a single lug, gradually remove the locking part 26 of the first lug around the central axis Z10 in the azimuth angle, then remove the lug locking part located on the other side of the corresponding lug arched section 27, then remove the lug arched section 27 released therefrom, then remove the adjacent lug locking part 26, then remove the second lug arched section 27 released therefrom, and so on.

[0210] The fan-shaped areas 26, 27, 28, and 29 of each lug 22 and 23 are removed by a removal movement, the removal movement depending on the arrangement of the trench sidewalls, i.e.:

[0211] i) If the sidewall of groove 15 is generated in the axial generation direction DG_A parallel to the central axis Z10, then the axial translation removal movement M_A is used, such as... Figure 20B , Figure 20C and Figure 21A As shown; preferably, after the axial translation to remove the moving M_A, the M_B can be tilted and moved around an axis perpendicular to the sagittal meridian planes P_MER_26 and P_MER_27 of the relevant sector regions 26, 27, 28, and 29, as shown. Figure 20D , Figure 20E , Figure 21B and Figure 21C As shown, in particular, if the axial distance separating the lugs 22 and 23 is smaller than the total axial length of the sector areas 26, 27, 28, and 29 to be removed due to the size of the manufactured tire 2; since the radially inner lower surface of the lug 23 opposite to the lug 22 to be removed forms an inclined surface that matches the inclined surface of the corresponding conical surface 32 of the central ring 21, this inclined surface M_B is advantageous, and this inclined surface M_B can therefore provide a corresponding clearance after the central ring 21 is removed;

[0212] ii) Alternatively, if the sidewall of the groove 15 is generated in an oblique generating direction DG_O that intersects the central axis Z10 at a non-zero acute coplanar angle A44, then it is an oblique centripetal translation M_O that simultaneously includes axial and radial components, such as... Figure 22A , Figure 22B and Figure 22C As shown. The oblique translational movement M_O is advantageously included in the oblique generation direction DG_O.

[0213] It should be noted that in the first case i) above, the axial translation to remove the moving M_A is particularly necessary. It allows the lobes of the lugs 22 and 23 to fully disengage from the hollow part of the cavity 9, especially from the inner edge of the bead 4 and 5, so that the tilting moving M_B can be performed subsequently without forcing the bead 4 and 5 to move away from the crown 3, and therefore without forcing the support 16 to move.

[0214] It should also be noted that the inventors observed that, without a doubt, due to the residual temperature of the core 10, especially the residual temperature of the tire 2, when the tire 2 is removed from the core 10 after curing (the residual temperature may be between 50°C and 70°C), the support 16 is still relatively loose, that is, not (not yet) fully tightened, which is beneficial for removing the support 16 without damage.

[0215] Regardless of the initial trajectory taken by the moving parts M_A and M_O, once the lug sector areas 26, 27, 28, and 29 have disengaged from the support member 16, the order in which the lug sector areas 26, 27, 28, and 29 are removed can be freely completed from inside the tire 2, for example, by the following methods: Figure 20F As shown, a radial movement is performed, which brings the relevant sector areas 26, 27, 28, and 29 toward the central axis Z10, radially passing through the boundary formed by the tire bead 4 and 5, and then an axial movement is performed, which completely brings the sector areas 26, 27, 28, and 29 out of the envelope defined by the tire 2 along the axial direction.

[0216] After the sector areas 26 and 27 of one lug 22 have been removed, or after each of lugs 22 and 23 has been dislodged from the cavity 9 of the tire 2, the respective housings 61 can be removed sequentially by rotation and tilting, which causes the housing 61 to slide from the edge between the two supports 16 (one arm of the housing immediately following the other). Similarly, the shielding strip 63 can also be removed by spiral sliding, which causes it to pass into the space between the two consecutive supports 16.

[0217] Of course, the present invention is by no means limited to the above-described variant embodiments. Those skilled in the art can separate or freely combine the above features, or replace them with equivalent forms.

Claims

1. A tool (1) suitable for manufacturing a toroidal tire (2), the toroidal tire (2) comprising a crown (3), a first annular bead (4) and a second annular bead (5), and a first sidewall (6) and a second sidewall (7), the crown (3) being adapted to form a tread, the first annular bead (4) and the second annular bead (5) being designed to attach the toroidal tire (2) to a mounting support, the first sidewall (6) and the second sidewall (7) respectively connecting the crown (3) to the first annular bead (4) and the second annular bead (5), the crown (3), the first sidewall and the second sidewall, and the first annular bead and the second annular bead forming integrally a wall having a concave inner surface (8-in). 8), the concave inner surface (8_in) defines the cavity (9) of the toroidal tire (2), the tool (1) includes a toroidal core (10) having a convex outer surface called a "receiving surface" (10_out) around its central axis (Z10), the shape of which matches the concave inner surface (8_in) of the tire wall (8), and the receiving surface (10_out) includes a radially outer crown region (11) and a first lateral region (12) and a second lateral region (13) on both axial sides of the crown region (11), the radially outer crown region (11) being adapted to receive the toroidal tire. The tool (1) is a component of the crown (3) in the tire (2), wherein the first lateral region (12) rotates toward the central axis (Z10) and is adapted to receive components forming the first sidewall (6) and the first annular bead (4), and the second lateral region (13) rotates toward the central axis (Z10) and is adapted to receive components forming the second sidewall (7) and the second annular bead (5), such that the toroidal core (10) includes a volume referred to as a "reserved volume", which is externally defined by a receiving surface (10_out) and corresponds to the cavity (9) of the tire, wherein the toroidal core (10) is characterized in that the toroidal core (10) has a plurality of channels (15) which are located on the receiving surface (10_out). The channel (15) extends into the reserved volume below the _out and leads to the receiving surface (10_out), such that each of the channels (15) connects the crown region (11) of the receiving surface to one of the first lateral region and the second lateral region (12, 13), thereby enabling the toroidal core (10) to receive a reinforcing element called a "support" (16) within the channel (15), the support (16) being designed to be permanently integrated into the structure of the toroidal tire (2), and each support (16) extending in the cavity (9) of the tire connects a crown anchor point (17) located in the crown (3) of the tire to a lateral anchor point (18) located in either the sidewall or the bead of the tire. in, The channel (15) for the support (16) is formed by a groove, which is hollowed out from the receiving surface (10_out) within the thickness of the reserved volume, such that the groove has a continuous opening along the contour of the receiving surface (10_out) from the crown region (11) to the associated lateral regions (12, 13). The toroidal core (10) comprises a plurality of annular sub-assemblies (21, 22, 23), the plurality of annular sub-assemblies (21, 22, 23) comprising: i) A first annular sub-assembly (21) referred to as the "center ring", which forms the central portion of the crown region (11) of the receiving surface (10_out), is adapted to receive one or more components of the crown (3) forming the annular curved tire (2). ii) A second annular subassembly (22) referred to as the "left lug," which is axially adjacent to the central ring, the left lug including a first lateral region (12) of a receiving surface (10_out) and a portion of the crown region (11) extending axially from the central portion of the crown region (11) on the corresponding side of the central ring, and the left lug including a groove forming a channel for a support (16) that connects the first sidewall (6) of the tire to the crown (3) of the tire, and iii) A third annular subassembly (23) referred to as the "right lug" is axially adjacent to the central ring. On the side of the central ring opposite to the side that accommodates the left lug, the right lug includes a second lateral region (13) of a receiving surface (10_out) and a portion of the crown region (11) extending axially from the center portion of the crown region (11) on the corresponding side of the central ring. The right lug also includes a groove forming a channel for a support (16) that connects the second sidewall (7) of the tire to the crown (3) of the tire. The annular subassemblies (21, 22, 23), namely the central ring, left lug, and right lug, are each angularly divided into sector areas (24, 25, 26, 27, 28, 29) around the central axis (Z10). The sector areas referred to as "locking parts" (24, 26, 28) alternate with the sector areas referred to as "arched sections" (25, 27, 29). The locking parts (24, 26, 28) are designed to be radially accessible from the inside and are removed first when disassembling the relevant subassemblies (21, 22, 23). The arched sections (25, 27, 29) are supported and locked in place by the locking parts (24, 26, 28) and are designed to become movable after being released by removing the locking parts (24, 26, 28).

2. The tool according to claim 1, characterized in that, At least one lug locking portion (26, 28) has flanks (40, 41) parallel to an imaginary plane called the "sagittal meridian plane" (P_MER_26), which defines an angular sector (A26) occupied by the lug locking portion in azimuth about the central axis (Z10) and thus forms a parting line (PJ). The lug locking portion (26, 28) extends along the parting line (PJ) within the annular subassembly (22) and is adjacent to the lug locking portion ( The lug arch sections (27, 29) of 26, 28) interact with each other, the sagittal meridian plane (P_MER_26) corresponding to the radial plane containing the central axis (Z10) and intersecting the middle of the angular sector (A26) occupied by the associated lug locking part (26, 28), such that the flanks (40, 41) allow the lug locking part (26, 28) to be removed from the adjacent lug arch section (27, 29) by sliding and / or tilting along the parting line (PJ).

3. The tool according to any one of claims 1 and 2, characterized in that, Each groove in a single lug sector (26, 27, 28, 29) is defined by two sidewalls, which are generated in an axial direction (DG_A) parallel to the central axis (Z10), or form a conical surface that flares out from the bottom (19) of the groove toward the receiving surface (10_out), thereby opening a free space throughout the interior of the relevant groove. This free space contains an imaginary volume called the "necessary clearance volume," which is achieved by causing the relevant support (16) to move along the virtual clearance. The track is generated by virtual movement, the virtual departure from the track being contained in an axial generation direction (DG_A) parallel to the central axis (Z10), such that the groove allows for axial removal of the associated lug sector (26, 27, 28, 29) by axial removal movement (M_A), and the sidewalls of the groove do not interfere with the support (16) during the axial removal movement (M_A), wherein the axial removal movement (M_A) is parallel to the central axis (Z10) and toward the equatorial plane (P_EQ) of the toroidal core (10).

4. The tool according to claim 1, characterized in that, The groove is generated along a radial plane containing the central axis (Z10), so that a support (16) extending along the radial plane can be placed within the toroidal tire (2).

5. The tool according to claim 1, characterized in that, The grooves are intersecting, thus forming a grid on the receiving surface (10_out) so that intersecting supports (16) can be placed within the toroidal tire (2).

6. The tool according to claim 5, characterized in that, Each of the intersecting grooves in a single lug sector (26, 27, 28, 29) is defined by two sidewalls that are generated in an oblique generating direction (DG_O). The oblique generating direction (DG_O) is contained in a radial plane called the "sagittal meridian plane" (P_MER_26, P_MER_27) that intersects the middle of the relevant lug sector. In the sagittal meridian plane, the oblique generating direction (DG_O) converges toward the central axis (Z10) in a direction from the relevant lug toward the opposite lug, and forms an angle called the "co-latitude angle" (A44) with the central axis (Z10). The co-latitude angle (A44) is not zero and is strictly less than 90 degrees.

7. The tool according to claim 6, characterized in that, The flanks (40, 41) of the relevant lug locking portions (26, 28) and the resulting parting line PJ are generated based on the basic profile (45) in the oblique generation direction (DG_O), i) according to the first alternative, the basic profile (45) corresponds to the intersection line (46) of the receiving surface (10_out) and the radial plane (P1, P2), the radial plane (P1, P2) being angularly offset relative to the sagittal meridian plane (P_MER_26) of the lug locking portions (26, 28) by a certain value in the azimuth angle so that the basic profile (45) ) passing through the relative vertices of the grid cells, which are defined on the receiving surface by intersecting grooves that continue from the crown region (11) to the lateral regions (12, 13) along the basic contour (45), or ii) according to the second alternative, the basic contour (45) corresponds to a zigzag dashed line (47) formed on the receiving surface (10_out) by alternating edges of grid cells that are defined on the receiving surface by intersecting grooves and continue from the crown region (11) to the lateral regions (12, 13).

8. The tool according to claim 1, characterized in that, The channel (15) for the support (16) is defined by a sidewall, and the annular core (10) has a groove (50) on the back side of the sidewall located below the receiving surface (10_out) and extending through the channel (15), the groove (50) being different from the channel (15) and separated from the channel (15) by the sidewall.

9. The tool according to claim 1, characterized in that, The tool includes a blocking device (60) that interacts with the toroidal core (10) to prevent components forming the tire crown (3), sidewall, or bead from penetrating into the channel (15) of the engagement support (16) of the toroidal core (10).

10. A method for manufacturing a toroidal tire (2), said toroidal tire (2) comprising a crown (3), a first annular bead (4) and a second annular bead (5), and a first sidewall (6) and a second sidewall (7), said crown (3) being adapted to form a tread, the first annular bead (4) and the second annular bead (5) being designed to attach the toroidal tire (2) to a mounting support, the first sidewall (6) and the second sidewall (7) respectively connecting the crown (3) to the first annular bead (5). 4) The first and second annular bead (5), the crown (3), the first and second sidewalls, and the first and second annular bead as a whole form a wall (8) having a concave inner surface (8_in), which defines a cavity (9) of a toroidal tire (2), the toroidal tire (2) including reinforcing elements (16) referred to as "supports" (16), each support (16) extending in the cavity (9) of the tire, and located in the crown (3) of the tire. The crown anchor point (17) is connected to a lateral anchor point (18) located in one of the tire sidewall or the bead. The method includes a preparation step (S0), a step of placing the support (16) (S2), a filling step (S4), a curing step (S5), and a demolding step (S6). In the preparation step (S0), a tool (1) according to any one of claims 1 to 9 is prepared. In the step of placing the support (16) (S2), reinforcing filaments (70) suitable for forming the support (16) are passed through each channel (15) of the toroidal core (10). In the filling step (S4), the components forming the tire crown (3), sidewall, and bead are placed on the receiving surface (10_out) to construct the wall (8) of the toroidal tire (2). In the demolding step (S6), the toroidal core (10) is detached from the toroidal tire (2), leaving the support (16) in a suitable position in the cavity (9) of the toroidal tire (2).

11. The method according to claim 10, characterized in that, The step (S2) of placing the support member (16) uses a continuous reinforcing wire (70) which is arranged in a serpentine manner through successive channels (15) by moving the continuous reinforcing wire (70) in an integral manner from one lateral region (12) of the toroidal core (10) through the crown region (11) to another lateral region (13).

12. The method according to claim 10, characterized in that, In the filling step (S4), the component is wound around the rotating toroidal core (10).

13. The method according to claim 10, characterized in that, After the preparation step (S0) and before the step (S2) of placing the support (16), the method includes a prefilling step (S1) in which anchoring structures (71, 72) are laid on the lateral regions (12, 13) and crown region (11) of the receiving surface (10_out) of the core, facing the anchor points (18, 17) set for attaching the support (16) to the tire wall (8), the anchoring structures (71, 72) being designed to receive the ends of the support (16) exposed from the channel (15) of the core and to adhere to the components forming the sidewall, bead or crown (3), respectively, by clamping the ends of the support (16) between the anchoring structures (71, 72) and the components, thereby securing the support (16) to the set anchor points (18, 17).

14. The method according to claim 10 or 13, characterized in that, The annular core (10) includes a central ring, a left lug, and a right lug, the left lug and the right lug including channels (15) for the support (16), the channels (15) being in the form of grooves and opening on the receiving surface (10_out), each of the central ring and lug being divided into fan-shaped areas at an angle, these fan-shaped areas forming alternating locking portions (24, 26, 28) and arched sections (25, 27, 29), the demolding step (S6) first includes removing the central ring. The sub-steps are: first, removing the first lug; second, removing the first lug; and third, removing the other lug. In the sub-step of removing the center ring, the locking portion (24) of the center ring is removed radially, and then the arched section (25) of the center ring is removed to release the lug. In the second sub-step of removing the first lug, the locking portion (26) of one of the left and right lugs is removed from the tire cavity (9), and then the arched section (27) of the lug is removed from the tire cavity (9) to release the corresponding portion of the cavity and the support (16) located in the corresponding portion of the cavity. In the third sub-step of removing the other lug, the locking portion (28) of the other lug is removed from the tire cavity (9), and then the arched section (29) of the other lug is removed from the tire cavity (9) to release the corresponding portion of the cavity and the support (16) located in the corresponding portion of the cavity. The sector (26, 27, 28) of each lug is removed by removal movement. 8, 29), the extraction movement depends on the arrangement of the trench sidewalls, i) if the trench sidewalls are generated in an axial generation direction (DG_A) parallel to the central axis (Z10), then it is an axial translational extraction movement (M_A), or ii) if the trench sidewalls are generated in an oblique generation direction (DG_O) intersecting the central axis (Z10) with a non-zero acute coplanar angle (A44), then it is an oblique centripetal translational movement (M_O) that includes both axial and radial components.

15. The method according to claim 10, characterized in that, After step (S2) of placing the support member (16), the method includes a protection step (S3) in which a blocking device (60) is implemented, which interacts with the toroidal core (10) in the filling step (S4) and the curing step (S5) to prevent components of the crown (3), sidewall or bead of the toroidal tire (2) from penetrating into the channel (15) of the toroidal core (10), which is engaged with the support member (16).

16. The method according to claim 15, characterized in that, The blocking device (60) is implemented by applying shielding elements (61, 63) to the receiving surface prior to the filling step (S4), the shielding elements (61, 63) covering the channel (15) and thus forming a barrier between the channel (15) and the components of the tire wall (8), or by using a filling element (65) that temporarily fills the empty volume of each channel (15) at least during the curing step (S5), the empty volume being between the support (16) engaged with the channel (15) and the opening of the channel (15) on the receiving surface (10_out).

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