MXPA00000331A - Tire bead core and filler construction - Google Patents

Abstract

The run-flat tire (10) of this invention includes spaced apart bead areas (30) having a unique design to include first (34) and second (36) bead fillers adjacent a bead core (32). The second bead filler (36) is bounded by the first bead filler (34) and bead core (32). The method for manufacturing the tire to eliminate voids at the bead core (32) of the cured tire is also provided. The bead fillers are made to be resilient so that the tire can be easily mounted on a rim, particularly improving the ability to mount a run-flat tire (10) on a rim (80). The bead core (32) and fillers (34, 36) are designed for helping to sustain the run-flat tire (10) on the rim (80) with a loss of inflation pressure and to improve the running performance of the tire.

Description

CONSTRUCTION OF THE NUCLEUS AND FILLING OF THE NEUM TICO REBORN BACKGROUND OF THE INVENTION FIELD OF THE INVENTION This invention is concerned with the radial tires used for vehicles and more particularly with the design of the lower side wall and area of the flange or molding of a flat tire to improve the manufacturing process of the tire, assembling the tire. tire on a standard tire and the progress performance of the tire on a vehicle.

DESCRIPTION OF THE TECHNIQUE Construction of a tire by conventional elements includes initially disposing uncured or green rubber components at one time around a cylindrical tire building drum and integrating the carcass and rim portions of the tire. Then, the green tire is removed from the cylindrical drum and expanded to a toroidal shape before the crown and rubber belt folds from the running surface are added to carry out the completion of the green tire ready to be cured in a mold of curing. The result is that the components that end in the side wall of the tire have been rotated approximately 90 degrees during the transition going from the cylindrical shape to the shape REF: 32492 toroidal during the manufacturing process. The rotation of the components of the side wall and the components of the flange area around the rim core is typical of one of the possible means of manufacturing a tire. The core of the flange is generally of high torsional rigidity and does not rotate during this process. This rotation process must be carefully controlled. The problems of rotation can be more difficult with the addition of reinforcing elements of the side wall when producing flat bearing tires. There is a need in the art to improve the ability to rotate the flange area of the green tire as it advances from the cylindrical shape to the toroidal shape during the integration process of the tire. Processes for making a green or uncured tire are described in U.S. Patent Nos. 4,007,069; 4,842,682; 5,215,612 and 5,380,384. These processes show variations in how the toroidal shape is obtained from the cylindrical shape and lateral wall components are later added to the toroidal shape by an additional tire integration step. These processes are used with the integration stage of the green tire. These processes are used with green tires that have a single padding or reinforcement of the flange.

The cured tire is mounted on a rim of a vehicle by mechanical means, such that the tire is sealed against the rim. The rim transfers the weight of the vehicle through the tire to a floor surface. The assembly of the tire can be difficult since the pressure of the interface between the tire and the rim should be appropriate to maintain inflation pressures in the tire and keep the tire seated in the tire. The interface pressure during assembly becomes very critical with the flat bearing tires as a result of the stiffer sidewalls and the requirement that the flat bearing tire remain on the rim with a loss of inflation pressure. The flange areas that include the rim cores and flange fillings together with the side walls of the tire provide strength for mounting the tire on the rim. Some tires also include additional reinforcement folds such as chamfers, flaps and the like that influence the mounting of the tire on the rim. Typical reinforcing plies are described in U.S. Patent Nos. 4,790,364 and 5,033,524. These folds further increase the radial stiffness of the tire when the tire is mounted on the rim. There is a need in the art to have better flexibility or resilience of the filling or reinforcement of the flange adjacent to the rim core., in a way that the tire can be easily assembled, especially when a flat tire is mounted on a rim. The shape, dimensions and material properties of the components in the lower side wall and rim of a tire have a direct effect on the ability to mount the tire on a rim. The tire can be designed in a way that it has a flexible shape, dimensions and material properties. The properties of the filler material can be made to be different near the rim core than radially outwardly on the side wall, to facilitate an efficient tire manufacturing process and make the tire easy to ride on a rim. The disclosures of US patents Nos. 4,046,183; 4,120,338; 4,508,153 and 5,164,029 and Japanese Patent No. 5-178037 illustrate the use of flange reinforcements or fillings having two parts; which consist of a part adjacent to a core or center of the flange and another part extends to the side wall area. These reinforcements or fillings of the flange of two parts use different properties of size, shape and material for each of the two parts. The flange areas of many of these references also include additional reinforcement folds positioned adjacent the flange fillings to improve the durability and strength of the tire flange region. U.S. Patent No. 3,682,223 discloses softer cushion strips added between a harder wedge-shaped apex strip and the radial wire casing to improve the durability of the tire in the flange area. There remains a need in the art to improve the use of two-part flange fillings in the flange area while maintaining its advantages. It is known that the design of the tire flange area has a direct effect on the comfort of travel and the handling performance of a vehicle. The lateral movements of a vehicle are directly influenced by the natural stiffness of the tire. The lateral stiffness of the tire is greatly influenced by the design of the flange area. The resilience of bending the area of the lower rim of the tire with respect to the rim is a major factor in the natural stiffness of the tire. The radial stiffness of a tire also has a direct effect on the travel comfort of the vehicle. The design of the tire must satisfy a large number of design criteria, it is known that some of the criteria conflict with other criteria, such > So the design of a tire with due consideration to manufacturing issues and performance characteristics remains a challenge. This is especially true when designing a flat bearing tire that can also run with a loss of inflation pressure. There is a need in the art to integrate a green or uncured tire having a rim area that can be easily rotated around the rim core when the tire is manufactured and not only provides a cured tire that can be easily mounted on a rim to settle on the rim as discussed above, but also have radial and lateral stiffness properties for improved vehicle handling and ride comfort. Thus, an object of the invention is to provide a method for forming a green or uncured tire using an integrating drum or tire construction such that first and second beads of the flange can be laid in a flat configuration on an integration drum. of tire and then positioned radially outwardly of a center or core of the rim during a training stage. Another object of the invention is to provide a tire having an annular rim core in combination with rim fillings such that the cured tire can be easily mounted on a rim of a vehicle without excessive inflation pressures, in such a way that make an appropriate contact with the tire, as long as a vehicle with good travel comfort and driving performance is provided. Yet another object of the present invention is to provide a tire having annular flange cores and flange fillings, when designed as a flat rolling tire, having a lower side wall that is resilient and deformed to the shape of a flange of tire during the loss of inflation pressure. A further object of the present invention is to simplify the design of a flat tire to reduce the number of different rubber components used in the flange area when manufacturing the flat tire.

BRIEF DESCRIPTION OF THE INVENTION In one variation, the invention provides a flat rolling tire easily mounted on a rim of a vehicle for the normal operation of the vehicle. The tire is useful for many vehicles that include passenger cars, light trucks, trucks and the like. The tire has a rolling surface portion for contacting a floor surface and a web package with inner web folds to the running surface for supporting the running surface. A plurality of carcass plies positioned within the belt folds extend between spaced apart annular rims or flanges. The tire has a pair of sidewall portions each extending radially inward from ridges at the side edges of the belt pack or package to the annular ridges. The spaced apart flanges have a unique design that includes areas of the flange with first and second flange fillings above the flange cores that include the second flange filling with a different hardness and having a drop shape that is enclosed by the flange. flange core and first flange filling. The method of forming a green tire mounted during the tire building process is also unique to this invention. The radial tire of this invention is for mounting on a rim of a vehicle for holding loads of the vehicle by contact with a ground surface in a tire contact patch. The tire comprises internal side wall components that include an inner liner or liner and at least one carcass layer disposed within the tire to retain an inflation pressure within the tire when mounted on the rim and provide a radial carcass structure under tension when the tire is inflated. A pair of spaced apart annular flanges are interconnected by at least one carcass layer, wherein each of the annular flanges has a rim core, first and second rim fillings and interface components of the rim to hold the tire on a rim when mounted thereon. The core of the flange has an annular coil of wire filaments forming a polygonal cross section having a predetermined tensile strength. The annular flanges are spaced apart by an axial distance corresponding to the width of the rim on which the tire is to be mounted. The external side wall components have rubber portions of the side wall and at least one outer shell layer. The at least one outer shell layer has a lapping arrangement with at least one inner shell layer; as one or more carcass layers wrap around the rim core. The first flange fillers are each disposed radially from a respective rim core to extend radially to a side wall area of the tire and are limited on one side by at least one inner shell layer and at least one carcass layer. external The second flange filling is in the form of a rubber drop having an inner radial side adjacent the core of the flange and limited by the first filling of the flange on the other sides of the second flange filling. A crown portion of the tire has a belt pack or package radially outwardly of the internal side wall components and a running surface for contacting the ground surface in the contact patch to support the vehicle. The present invention includes a unique method for forming a tire in a tire building or integration process from a green or uncured tire using a cylindrical tire building drum. The method comprises the following steps. The first step includes providing internal sidewall components and interfacing components of the green or uncured tire rim including an inner liner or liner and at least one inner shell layer and placing the internal side wall components and components of the rim interface around an external surface of the construction drum or tire integration. The interface components of the rim include elastomeric rubber portions and portions bent upwardly of the at least one carcass layer. In a second step the method includes providing a pair of flange cores having an annular coil of wire filaments and placing the flange cores spaced apart axially in a radially outward position of respective interface components of the rim and providing a pair of first flange fillings having an axially tapered and tapered cross-sectional shape and placing each of the first flange fillings around the outer surface of the building drum with a short axial outer edge adjacent to axial internal edges of a respective core of the flange in a radially flat position to the outside of the internal side wall components. The third step of the method includes providing a pair of second flange fillings having a rubber drop shape and placing each of the second flange fillings around a respective flange core such that one radial inner edge of the second fill of the flange is adjacent a radial outer edge of the respective rim core. A fourth step includes folding the rim interface components at each lateral edge around a respective rim core and a second rim filling to interconnect with a radial external face of the first rim filler. A fifth step includes placing external side wall components having sidewall rubber components and at least one outer shell layer around the building drum between the flange cores radially outwardly of the internal side wall components and the first filling the flange and wrapping the at least one inner shell layer with the at least one outer shell layer. In a sixth step, the method includes forming the components assembled to a toroidal shape by forcing the pair of flange cores to approach each other as the first flange filling and the interface components of the rim are rotated about each one of the respective cores of the flange and second filling of the flange. Additional methods of providing a cured tire for use in a vehicle comprise the additional steps of: adding a belt portion and a tread surface rubber to a crown area of the assembled components to provide a green cured tire; curing the green tire mounted on a tire mold and providing a cured tire, wherein each second shoulder reinforcement or padding is positioned to have a side adjacent the respective core 'of the rim, to extend radially outwardly from the respective rim core and to be limited by the first filling of the flange on the other sides of the second filling of the flange and mounting the cured tire on a rim of a vehicle to transfer the loads of the vehicle to a surface of the ground by means of the rim and the cured tire for advance the vehicle. Other variations and combinations of stages can be provided, that is, according to the available manufacturing machines.

BRIEF DESCRIPTION OF THE DRAWINGS Additional features of the present invention will become apparent to those skilled in the art with which the present invention is concerned upon reading the following, with reference to the accompanying drawings in which: Figure 1 is a radial cross-sectional view of a tire that is symmetrical about a mid-circumferential plane according to the invention; Figure 2 is a cross-sectional view of portions of a flange area of a green or uncured tire of this invention, placed in a tire building drum during the manufacture of the tire; Figure 3 is a cross-sectional view of an area of the flange of the cured tire of this invention, showing the relative position of the rim core and the rim fillings; Figure 4 is a cross-sectional view of the cured tire of Figure 3 which is mounted on a rim and subjected to typical vehicle loads for a flat tire having lost its inflation pressure; Figures 5A-5C are cross-sectional views of three flat bearing tires showing portions of a flange area of green or uncured flat rolling tires of this invention, each placed on a tire building drum during manufacture of the flat bearing tire; Figure 6 is a cross-sectional view of portions of the flange area of a green tire of this invention having an alternative design for a core of the rim and a second filler flange is placed on a drum tire building during manufacture of the tire; Figure 7 is a cross-sectional view of an area of the rim of a cured tire of this invention showing the relative position of the rim core and the rim fillings of the alternative design of Figure 6; Figure 8 is a cross-sectional view of portions of a flange area of a green tire of this invention having another alternate design for a core of the rim and a second filler flange is placed on a drum tire building during the manufacture of the tire and Figure 9 is a cross-sectional view of an area of the rim of a cured tire of this invention, showing the relative position of the rim core and the rim fillings ** of the alternative design of Figure 8. .

DETAILED DESCRIPTION OF THE PREFERRED MODALITY A typical tire 10 made in accordance with the present invention is illustrated in Figure 1. The cross-sectional view of Figure 1 is a radial cut of the tire showing only half the cross section of the tire . The tire is symmetrical with respect to the circumferential mid plane P of the tire. The crown portion 14 of the tire includes a running surface 12 having a running surface for contacting a surface of the tire. floor to support a vehicle by transferring the vehicular loads of the rim through the tire to the ground surface. The running surface is supported by a plurality of reinforced web folds that form a belt pack or package 80 in a belt around the interior of the tire to the running surface. The belt pack extends laterally on the crown of the tire from shoulder to shoulder. The side walls of the typical tire 10 are formed by internal side wall components 51 and external side wall components 41 that include the carcass layers. The carcass plies 44 and 48 of the tire 10 have a conventional radially reinforced rubber matrix with parallel metallic reinforcing elements or synthetic cords extending at an angle of less than about 15 degrees from a plane radial containing the axis of rotation of the flat bearing tire. The internal side wall components 51 include a lining rubber 49 or inner liner which is provided on the inner surface to maintain air under pressure within the flat tire. The internal side wall components 51 of this tire include reinforcing or sidewall protective elements 50. The sidewall reinforcing elements are generally made of a hard rubber material having a high modulus and hardness conventional in the art. The core 32 of the flange of the flange area 30 is preferably made with a plurality of layers formed by an annular coil of wire or synthetic cord filaments spliced together, as illustrated in Figures 2-. The position of the rim core of a cured tire with respect to the rim 80 on which it is to be mounted is critical for mounting the flat tire and keeping the tire seated on the rim with a loss of inflation pressure within the tire. of flat bearing (figure 4). The typical tire of Figure 1 made in accordance with this invention has been mounted on a conventional tire 80. The diameter of the rim is generally greater than the diameter of the rim area for all tire sizes. As the tire is placed on the rim, the tire is overinflated as it is forced axially outward on a central portion 82 of the rim and on the seat 86 of the rim. The interface components 31 with the tire rim are brought into contact with the rim seat and the tire is seated. The interface components are compressed against the seat 86 of the rim 80 to provide a seal for retaining air in the tire. A rim flange 84 generally does not contact the corner 31a of the heel of the mounted tire, but is used as a fulcrum for tools to assist in mounting the tire on the rim. The filling of the single flange of this invention is made in two parts to improve the manufacturing process in obtaining a good bond with the core 32 of the flange. A first filler 34 of the flange extends radially outwardly to the side wall area 40. A second padding of the flange 36 has a rubber droplet cross-sectional shape and is positioned radially outwardly of the rim core to provide a softer and more resilient material having a lower module adjacent the rim core. The second filling 36 of the soft flange improves the manufacturing process when the green tire is formed in a toroidal shape from the cylindrical shape on a construction drum and decreases the effort required to mount the tire on a rim. The tire of this invention is suitable for use as a flat tire with the addition of reinforcing elements 50 increasingly in the side walls of the tire. The flat tire of this invention has been simplified by using only a limited number of internal and external side wall components 51 and 41 respectively and components in the areas of the rim 30 of the flat tire. The size and shape of the flange area of the flat tire affects the ability of the flat tire to be mounted on the conventional rim and to remain on the rim with a loss of inflation pressure. The use of materials for the various components of the flange area of the flat tire of this invention further improves tire performance.

The flange areas 30 for the tire of this invention have also been designed to work with a flat bearing tire having sidewall reinforcing elements 50 and a plurality of carcass layers. The flat bearing tire is illustrated in Figure 1 and has a sidewall reinforcing element in each of the first most filled sidewalls 34 of the flange extending radially to each side wall area 40, to further provide another reinforcing element. on the side wall. The reinforcing elements extend from the flange area radially outwardly to the side wall to terminate below the side edges of the pack or packing 80 of the flange to support loads on the rim of a floor surface when the flat bearing tire is mounted. on the rim. There are also two illustrated shell layers that include an inner shell layer 48 and an outer shell layer 44. Additional carcass layers can be added adjacent to the two layers shown. The carcass plies are arranged together with the sidewall reinforcing element and the first ridge filler in the formation of the flat tire 10. The first padding 34 of the flange in each area 30 of the rim for the tires of this invention are preferably made in such a way that they have a Shore A hardness with a value in the range of about 70 to 90 and an Elasticity Module at a tension unit of ten percent with a value in the range of approximately 7 Megapascals (MPa) to approximately 15 MPa. The second filling 36 of the flange is made in such a way that it has a hardness and a modulus smaller than the modulus of the first filling of the flange. The second flange filling has a Shore A hardness value in the range of about 20 to about 40 and an Elasticity Module in tension at ten percent tension with a value in a range of about 3 MPa to about 10 MPa. The second padding 36 of the rim illustrated in FIG. 3 is smaller and softer than the first padding 34 of the rim to provide advantages in the formation of a green flat tire during the tire construction process. The use of a second filler 37 of the flange having a softer material with more flexibility than the first filling of the flange helps with the mounting of the flat tire on the rim and in the manufacturing process of the tire. In addition, the performance of the flat bearing tire can be improved during the advancement of the vehicle by the addition of the second flange filling. The second filling has a preferred rubber drop shape in the embodiment shown. The length and cross-sectional width of the second flange filling can be varied to improve the production of the flat-bearing tire and its use with a vehicle. The second filler of the flange is totally limited by the first filler of the flange and the kernel of the flange in the cured flat bearing tire of this embodiment. Another advantage of the addition of a second flange filler according to this invention is realized when a cured flat bearing tire is mounted on a rim. The flexibility of the second padding of the softer flange allows the bead core to be more flexible with the reinforced side walls of the flat bearing tire. The core of the flange deforms or flexes from its annular ring shape as the flat bearing tire is mounted. The ability to easily mount the flat tire on the rim and keep the rim area 30 seated on the rim. 80 rim with a loss of inflation pressure inside the flat tire is critical. This capability is partially controlled by the relative radial stiffness of the sidewalls of the tire as it is forced to flex laterally and radially when the tire is mounted on the rim. The core of the flange is restricted less by the softer and more resilient rubber material of the second flange filling during assembly, in such a way that the forces and overpressures used to mount the flat bearing tire are reduced as a result of the second filling of the rim. The flat tire of this invention is made in such a way that it has a predetermined initial inflation pressure to seat the tire on the rim when the flat tire is mounted. The initial inflation pressure for the flat tire 10 has an average value in a range of about 2.1 Kilograms force per square centimeter (30 pounds per square inch) to about 2.8 Kilograms force per square centimeter (40 pounds per square inch). The interfaces surfaces of the interface components 31 of the tire and the seat 86 of the rim are usually lubricated to reduce the stress in mounting the flat tire on the rim. The tip point 85 of the rim will be positioned on the rim in such a way that an uninterrupted contact is made between the flat rim tire and the rim when the flat rim tire is fully mounted on the rim. A second padding 36 of the resilient flange together with the first padding 34 of the flange provides the flexibility needed to mount the tire of this invention. The rim rail core 32 can generally be considered as a non-extensible annular ring when the flat rim tire is mounted on the rim. However, some stretching of the rim core occurs when the flat rim tire is mounted on the rim and a circumferential change in length results in a small but significant change in the internal diameter of the rim core. To control these small but important changes, the rim core is made in such a way that it has a tensile strength at one percent of the unitary tension of the rim core with a value in the range of approximately 1100 to 3000 Newtons per square millimeter. . A torsional rigidity of the rim core is also important to keep the flat bearing tire seated on the rim. Torsional rigidity is discussed and defined in a later section. Another advantage of the addition of the second flange filling radially outward of each flange core 32 is performed during the construction process of the tire described in this invention. The second filling helps in the formation of a green tire to a toroidal shape from a cylindrical shape during the tire building process. This intermediate step is included when advancing the green tire of Figure 2 to the cured tire of Figure 3. The first harder flange fillings are initially placed on a cylindrically shaped tire building drum, axially internal to the respective cores of the tire. flange as illustrated in Figure 2. The second softer flange fillings 36 are positioned radially outwardly from the respective kernels 32 of the flange. The green tire is removed from the tire construction drum, cylindrical and formed to a toroidal shape. During the formation of the toroidal shape, the first filling is rotated around the stationary rim core to become radially outwardly of the second filler and the rim core in each area 30 of the rim. The second filler is made to remain stationary around the rim core as the first filler rotates. This unique tire construction process has the advantage of allowing the first flange filling to easily rotate from an initial position to a rotated position. The problems associated with an elongated or uneven rim core are compensated by the second flange filling. Additional advantages of the second padding addition of the flange of this invention are associated with the performance of a vehicle having the tires of this invention. From here, the tire designer can use the design even if other machines and manufacturing methods are used. The presence of the second filling of the rim will have an influence on the comfort of travel and handling of the vehicle. The shape and extension of the second padding 36 of the rim into the interior of the first padding 34 of the rim in the inflated flat tire are optimized. With the loss of inflation pressure the flat bearing tire deforms or flexes to support the vehicle through the support side walls of the flat bearing tire, as illustrated in Fig. 4. The area of the shoulder along the The flange fillings are bent in such a way that the flat bearing tire conforms better to the shape of the rim without displacing the flange core or greatly reducing the settling pressures at the flat tire to rim tire interface, as illustrated in figure 4. The ability of the flanges to help fills. The flat bearing tire to conform to the rim is improved by the addition of the second flange filler. The bending of the flange area is more critical during lateral maneuvers of the vehicle and the turning maneuvers of the vehicle can be improved by the addition of a second fill 36 of the flange. The flat bearing tire of this invention which is loaded with zero inflation pressure is illustrated in Fig. 4. The flat bearing tire is mounted on the rim 80 which is loaded by the load L and the torque M as a result of Support the weight of a vehicle. The interface components 31 of the rim remain in contact with the seat 86 of the rim and the point 85 of the tip remains in the rim seat. The core 32 of the flange has the torsional and flexural strength to keep the rolling tire flat on the rim and the flange fillings 34 and 36 along with the other inner side wall components 51 and the external side wall components 41 have been deformed as a unit to be superimposed on the flat bearing tire. The side wall reinforcing elements and the shell layers included in the internal side wall components 51, together with the first flange filler 34 act as a deformed beam to transfer loads to the rim with a loss of inflation pressure. Again, the first and second fillings 34 and 36 of the flange provide improved resilience to allow the flat bearing tire to bend and conform to the rim edge 84. * The contact between the corner 31a of the bead of the components 31 of The interface with the rim and the edge of the rim allows the loads on the flat bearing tire to be transferred directly to the rim flange. An additional embodiment of the tire 10 of this invention is made by defining the size, strength and flexibility of the rim core 32 when the tire is designed to be a flat tire. As illustrated in Figures 2-4, the rim core is a fundamental structural component in the various steps to provide a flat tire, mount the tire and support the tire on a rim during inflated and deflated tire conditions. flat bearing The rim core is a stabilizing component for the method of tire construction. The tensile strength of the rim core is discussed above in relation to mounting and retaining the flat rim tire on a conventional rim. The ability of the flange core to resist torsion is quantified by its torsional rigidity. The torsional rigidity of the core 32 of the rim is very important, particularly when the rolling tire is kept flat on the rim with a loss of inflation pressure. The torsional rigidity of the core 32 of the flange made of an annular coil of filaments of wire is made by measuring the torque or torque required to rotate a test sample 100 millimeters long of the core of the flange through an angle of 2.5 degrees. The torsional rigidity of the core 32 of the rim for the flat tire of this invention should be at least 100 Newtons meters per radian and is preferably about 200 Newtons meters per radian. further, the moment of inertial torsion of the cross-sectional area of the rim core is made to have a value in a range of 150 millimeters at the fourth power to about 350 millimeters at the fourth power and preferably 200 millimeters at the fourth power. Other side wall configurations are within the scope of this invention, which include flat bearing tires with two sidewall reinforcing elements and two inner shell layers. Various cross-sectional configurations are formed on the construction drum 20 when the green tire is made to provide sidewall reinforcing elements, as illustrated in Figures 5A-5C. The first padding 34 of the flange is also extended in length and / or becomes thicker to increase the stiffness of the side walls. A first filler 34a of the flange, tapering, shorter, is illustrated in Figure 5A. The first padding 34 of the rim, illustrated in FIG. 5B, represents the first padding of the rim of the uncured tire to become the cured tire as illustrated in FIG. 1 with a single stiffener 50. The first padding 34b of the rim, illustrated in Figure 5C it is somewhat smaller than that illustrated in Figure 5B for use with larger and more complex internal side wall components 50b. The second padding 36 of the rim and the core of the rim 32 are preferably made in such a way that they are similar for each variation of the flat-bearing tires shown in Figs. 5A-5C. The inner side wall components 51a, 51 and 51b shown in Figures 5A-5C respectively are made to illustrate a variable number of side wall reinforcing elements and inner shell layers 50a, 50 and 50b in the side wall area 40. The internal side wall components may include one to three side wall reinforcing elements and one, two or three shell layers radially outwardly of a liner rubber layer 49 or inner lining. Typical sidewall areas of flat rolling tires having internal side wall components with multiple reinforcing elements and carcass plies are shown in U.S. Patent Nos. 5,427,166 and 5,511,599. Some of the shell layers continue from inner side wall component 50a, 50 and 50b to wrap around the rim core 32 and have a wrapping arrangement with the outer shell layers in respective outer side wall components 41a, 40 and 40b . A typical wrapping arrangement is illustrated in Figure 1. The carcass layers extending around the rim core become part of the interface components 31 of the rim when they are adjacent the rim core 32. The interface components of the rim include portions of elastomeric rubber to make contact with the rim 80; in which the edge 84 of the rim is included in the cured tire when it is advanced with the loss of inflation pressure (figure 4). The foregoing discussion illustrates that the core 32 of the flange together with the first and second fillings 34 and 36 of the flange of this invention are designed to be used with various flat bearing tire configurations. The shape and size of the flange core and the second flange filling can also be altered within the scope of this invention. A core of the rim is generally formed as a polygonal shape having a cross-sectional area defined by imaginary sides that contact the outer surfaces of the wire strands or synthetic cords that make up the core of the annular rim. The core 136 of the rim of the embodiment illustrated in Figure 6 has an irregular polygonal shape. Other shapes and sizes of the rim core are within the scope of this invention. The internal side wall components 151 including the reinforcing element 150 for providing a flat bearing tire have been placed around the outer surface of the tire building drum 20. The interface components 131 of the rim have also been placed around the construction drum. The core 134 of the rim is positioned radially outwardly from the interface components of the rim before the interface components of the rim are wrapped around the rim core. A second padding 136 of the rim that also has an irregular polygonal shape is positioned radially outwardly of the rim core with the radial inner surface 136a of the second rim pad in contact with an outer radial side of the rim core. The first filler 134 of the flange is placed around the reinforcing elements 150 in an internal axial position with respect to the core of the flange, as shown by the arrow indicating the axial direction. The axial external surface 134a of the first flange filling comes into contact with the second core 136 of the flange and the core 132 of the flange. The wrapping of the rim interface components around the rim core and the second flange filling complete the construction drum similar to that shown in Fig. 6. The same method as previously described, although not required, can be used for obtaining a cured tire from the green tire on the tire building drum in this embodiment. The green tire of Figure 6 is removed from the cylindrical tire building drum and is formed into a toroidal shape for the addition of the belt pack and the running surface. The tire is cured in a mold to provide the tire of this invention. An area 130 of the rim of the cured tire is illustrated in Figure 7. The core 132 of the rim has not been rotated and the remaining tire components have been rotated about the rim core and to some extent the second rim fill 136. The rubber drop shape of the second flange filling has been lengthened to extend radially outwardly a greater distance than the tire of the previous embodiment of Figure 3. The second flange filling is again glued by the first filling of the flange and the core of the flange according to this invention. The second filling of the rim of this modality will similarly have a greater influence on the comfort of travel and the handling of the vehicle. This influence can vary depending on the relative rigidity of the second flange filling to the stiffness of the first flange filling. The ability of the area 130 of the rim of the tire of Figure 7 to bend around a rim with the loss of inflation pressure in the flat tire is improved by the elongated shape of the second fill. 136 of the flange and furthermore by using a second flange filling which is of a softer and more resilient material than the first flange filling for a flat bearing tire. The addition of the second filling of the inner flange to the first filling of the flange according to this invention has additional benefits during the operation of a tire. These benefits are again associated with the performance of a vehicle having the tires of this invention. The rubber drop shape of the preferred embodiment as previously illustrated in Figure 2 can be replaced by a second filling 236 of the elongated rim, as illustrated in Figure 8. The material of the second padding of the flange may be of a harder or softer rubber compound. In the case of a second filling of the harder and less resilient flange, the method of forming the pneumatic is also modified to allow the first and second fillers of the flange 234 and 236 to be complexed together before placing them on the construction drum 20 , as illustrated in FIG. 8. The core 232 of the preferred flange of this embodiment has a circular or regular polygon (ie, hexagonal) cross-sectional area and the interface components 231 of the flange conform to this flange core. rounded shape. The filling of the flange complexed with the first and second fillings of the flange together with the interface components of the rim are rotated around the core 232 of the flange during the formation of the tire from the cylindrical shape to the toroidal shape. The crown portions are added and the tire is cured to give the configuration of the flange area illustrated in Figure 9. The internal sidewall components 251 and the external sidewall components 241 are included to be similar to the tire of the tire. preferred modality. The tire of this embodiment mounted on a rim of a vehicle has an area of the rim that improves the lateral and radial forces on the tire during the advance. The embodiments of this invention can be used in combination or individually to form tires made by improved manufacturing processes and / or having improved performance characteristics. The combinations depend on the proposed use of the tire and include uses of conventional tires and flat tires. Generally speaking, the overall design of the first and second flange fillings together with the core of the flange of the invention described herein results in a combination consisting of an improved process for the manufacture, ie, but not exclusively, of tires of flat bearing to improve the mounting of the tire on a rim and improve the driving performance of the vehicle, especially with the tires of flat bearing design, when inflated and with a loss of inflation pressure.

EXAMPLES A sufficient rim holding capacity of the flat tire of this invention has been demonstrated when used in standard vehicles. Both flanges remain seated in a type J rim with zero inflation pressure in the tire during all moderate and many severe maneuvers; which include the braking and turning maneuver of 72 Kilometers per hour (45 miles per hour) used in the industry as a standard for the development of the flat bearing tire. Many industrial standard maneuvers involve values of natural acceleration of more than 0.5 times the acceleration of gravity (0.5 G). The flat tire of this invention exceeded all the requirements of these tests when mounted on the J-type rim. In very severe maneuvers, with standard vehicles that go beyond the standard test maneuvers, the flat tire with pressure of zero inflation remained on the J-type rim with only the internal rim seated on the rim seat. The retention of the flat bearing tire seated on at least one side of the rim allowed the vehicle to recover from a very severe maneuver and still provide the vehicle with continuous mobility. From the above description of preferred embodiments of the invention, those skilled in the art will perceive improvements, changes and modifications. Such improvements, changes and modifications within the skill of the art are proposed to be covered by the appended claims. It is noted that, in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (12)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. A method for forming a tire in a tire construction process from an uncured (or green) tire using a construction drum of the cylindrical tire, characterized in that it comprises the steps of: (a) providing internal sidewall components and interface components of the green tire rim that include an inner liner or liner and at least one inner shell layer and the components of inner side wall and the inner race components of the rim around an outer surface of the tire building drum, the interface components of the rim include elastomeric rubber portions and portions rotated upwardly of the at least one carcass layer; (b) providing a pair of flange cores having an annular coil of wire filaments and placing the flange cores axially spaced in a radially outward position of the respective interface components of the rim; (c) providing a pair of first flange fillings having an axially tapered elongated cross-sectional shape and placing each of the first flange fillings around the outer surface of the building drum with a short axial outer edge adjacent to a internal axial edge of a respective flange core in a radially flat position to the exterior of the internal side wall components; (d) providing a second pair of flange fillings having a rubber drop shape and placing each of the second beads of the flange around a respective flange core such that a radial inner edge of the second flange fill is adjacent a radial outer edge of the respective rim core; (e) folding the interface components of the rim on each lateral edge around a respective rim core and second rim filling to interconnect with an external radial face of the first rim padding; (f) placing the external side wall components having sidewall rubber components and at least one outer shell layer around the building drum between the rim cores radially outwardly of the inner side wall components and the first filling the flange and wrapping the at least one inner shell layer with the at least one outer shell layer; (g) removing the above components as assembled components of the uncured tire (green) from the cylindrical tire building drum and forming the components assembled in a toroidal shape by forcing the pair of rim cores to approach each other as long as it is made rotating the first flange filling and interface components of the rim around each respective flange core and second flange filling; (h) adding a belt portion and a tread surface rubber to a crown area of the assembled components to provide a mounted green tire; (i) curing the green tire mounted on a tire mold and providing a cured tire, wherein each second filling of the rim is positioned such that it has a side adjacent to the respective rim core, to extend radially outwardly from the respective core of the flange and to be limited by the first filling of the flange on the other sides of the second filling of the flange; and (j) mounting the cured tire on a rim of a vehicle to transfer the loads of the vehicle to a surface of the ground by means of the rim and cured tire to advance the vehicle.
2. 2. The method in accordance with the claim 1, characterized in that the step of providing the internal side wall components further includes providing side wall reinforcing elements radially external to the inner lining or lining, the reinforcing elements being arranged with the at least one inner shell layer, wherein the tire Curing becomes a flat bearing tire capable of supporting vehicle loads with a loss of inflation pressure within the flat bearing tire.
3. 3. The method of compliance with the claim 2, characterized in that the additional step of providing sidewall reinforcing elements includes providing a reinforcing element of increasing shape and a pair of inner shell layers with an inner shell layer disposed on each side of the reinforcing element in increasing manner. .
4. The method according to claim 2, characterized in that the additional step of providing the side wall reinforcing elements includes providing a pair of reinforcing elements of increasing shape and a pair of inner shell layers with an inner shell layer disposed between the two reinforcing elements of increasing shape and the other inner shell layer disposed between the reinforcing elements of increasing shape and the first filling of the flange. - -
5. 5. A radial tire for mounting on a rim of a vehicle for supporting the loads of the vehicle upon contact with a ground surface in a tire contact patch, the tire is characterized in that it comprises: internal side wall components that include a lining or inner liner and at least one shell layer disposed within the tire to retain an inflation pressure within the tire when mounted on the rim and provide a radial carcass structure under tension when the tire is inflated; a pair of spaced apart annular flanges spaced interconnected by the at least one shell layer, wherein each of the annular flanges has a rim core, first and second rim fillings and interface components of the rim to hold the tire on a tire when it is mounted on it; the core of the flange has an annular coil of wire filaments forming a polygonal cross section having a predetermined tensile strength, the annular flanges are spaced apart by a corresponding axial distance with a width of the flange on which the tire goes to be mounted; external side wall components having sidewall rubber portions and at least one outer shell layer, the at least one outer shell layer has a wrapping arrangement with the at least one inner shell layer as one or more of the carcass layers are wrapped around the rim core; the first flange fillers are each disposed radially from a respective flange core to extend radially to a side wall area of the tire and is mounted on one side by the at least one inner shell layer and the at least one layer of external shell; the second filler of the flange is in the form of a rubber drop having an internal radial side adjacent the kernel of the flange and limited by the first filler of the flange on the other sides of the second filler of the flange; and a crown portion of the tire having a belt package or pack radially outwardly of the inner side wall components and a running surface for contacting the ground surface in the contact patch to support the vehicle.
6. The tire according to claim 5, characterized in that the inner side wall components further include at least one reinforcing element of increasing shape disposed together with the at least one inner shell layer in such a way that the tire forms a Flat bearing tire to support the vehicle with a loss of inflation pressure.
7. The tire according to claim 5, characterized in that the rim core has a torsional rigidity of at least 50 Newtons meters per radian.
8. The tire according to claim 5, characterized in that the first filling of the rim has a Shore A hardness that is greater than the Shore A hardness of the second rim filling, wherein the tire is easily mounted on the rim and becomes Flexible with the rim when the tire is flexed.
9. 9. The tire according to claim 8, characterized in that the first filler of the flange has a Shore A hardness value in a range of about 70 to about 90 and the second filler of the flange has a Shore A hardness value in a range of about 20 to about 40.
10. 10. The A pneumatic tire according to claim 9, characterized in that the first filling of the flange has an Elasticity Module in tension at a unit tension of ten percent with a value in the range of approximately 7 MegaPascals (Mpa) to approximately 15 MPa (MegaPascals). , the second filling of the flange has an Elasticity Module in tension at ten percent of unit tension with a value in the range of approximately 3 MPa to approximately 10 MPa. The tire according to claim 5, characterized in that the first flange filling has a Shore A hardness value that is smaller than the Shore A hardness value of the second flange filling, wherein the tire has radial stiffness values and laterally higher than the stiffness values of a similar tire that is the same except without a second shoulder padding. The tire according to claim 11, characterized in that the first filler of the flange has a Shore A hardness value in a range of about 50 to about 80 and the second filling of the flange has a Shore A hardness value in the range from about 70 to about 90.