Tire manufacturing process and inner core

Abstract

The present invention discloses a forming core and forming process for tires. A tire inner core made of a fusible material is used to replace the vulcanization bladder, and is removed by melting and flowing out the inner core through heating after the tire is formed. By using this method, various different-shaped internal supports and spaces can be generated inside the tire. This process and inner core can be used to manufacture tires with raw materials being fluids or semi-fluids. It is suitable for heavy truck, trailer, light truck, off-road vehicle, ATV, bus, aircraft, agricultural, mining, bicycle, motorcycle and passenger car tires.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, and particularly to a tire forming process and a mold for tires. Background Art

[0002] As a component in contact with the ground of a vehicle, a tire requires high strength during the driving process of the vehicle, and at the same time needs to play a buffering role to ensure the comfort of the vehicle. In order to ensure the strength of the tire itself and meet its comfort, common tires are mostly pneumatic tires. At the same time, in order to meet some specific requirements, there are also some solid tires or non-pneumatic tires with a support structure.

[0003] The inflation methods of pneumatic tires are divided into two types: with an inner tube and tubeless. In either case, a cavity for storing gas needs to be formed inside the tire.

[0004] In the production process of traditional tires, in order to generate the cavity inside the tire, the capsule molding method is mostly used. The main principle of this method is that through high-pressure water or high-pressure gas entering the inside of the capsule, the capsule bulges, extruding the tire blank from the inside to the outside onto the tire mold, and forming the cavity inside the tire after vulcanization and shaping. After the vulcanization is completed, the capsule shrinks and is withdrawn. The shape of the capsule after bulging determines that the internal space of the tire is a connected annular space (as shown in Figure 1). The shape of the internal space of the tire has a great influence on the tire performance. For example, adding support ribs in the internal space of the tire can provide better support and stability for the tire, greatly improving the tire performance; adding a honeycomb structure in the internal space of the tire can be converted into a non-pneumatic tire to avoid the hazard of tire blowout, etc. However, due to the limitation of the capsule shape in the capsule process, it is extremely difficult to make a special-shaped internal space inside the pneumatic rubber tire.

[0005] If the initial state of the material in the production process of the tire is liquid (such as injection rubber, plastic polymers, etc.), if the traditional tire production process uses capsule molding, the material cannot provide a stable reverse pressure for the capsule, resulting in difficult control of the capsule expansion under the state of internal pressure. Affected by the expansion and self-weight, the capsule is very easy to come into contact with the outer mold, resulting in uneven thickness during product production and scrapping of the product. In addition, if it is necessary to improve the tire performance by adding a support structure in the tire, the capsule cannot provide positioning for the support structure. Therefore, the tires produced when the raw material is liquid are basically solid tires, which are higher in price cost and poorer in comfort compared with rubber tires. Moreover, when the required tires are large-sized engineering tires and giant tires, the weight of the solid tires is extremely large, the fuel consumption increases rapidly, and the production cost increases significantly. Summary of the Invention

[0006] The object of the present invention is to provide an inner core and a forming process for tire forming. This method uses a fusible material to make the tire inner core to replace the curing bladder, and after the tire is formed, the inner core can be melted and flowed out by heating. Using this method, various different-shaped internal supports and spaces can be generated inside the tire, and it is applicable to both inflated and non-inflated tires. The process of the present invention is suitable for various types of tires produced from liquid raw materials in the initial state.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] First, use a fusible material to make the inner core. Open the upper and lower molds of the inner core mold, inject part of the material to form a first material layer, then embed part of the heating wires and other inserts, and then inject part of the material to form a second material layer until the half mold is filled with a third material layer (as shown in Figure 2). After the upper and lower molds of the inner core mold are respectively filled, cool for a period of time until the material solidifies and shrinks, and then close the mold and inject the intermediate layer to form the overall product (as shown in Figure 3). By adopting this method, it can be ensured that the embedded heating wires are in the best position. After all the materials are injected into the mold, the mold is continuously placed in multiple low-temperature chambers with different temperatures for cooling according to a fixed time. During cooling, keep enough material in the feed bin to ensure shrinkage compensation after cooling. After cooling, take out the semi-finished product and enter the machining process to finely repair the outer shape of the semi-finished product and pre-groove or pre-drill the positions of the mechanical inserts (as shown in Figure 4). After machining, coat the surface with an isolation film, and the inner core is made. The sizes and uses of the mechanical inserts in the inner core can be various, and their types can be semi-penetrating type, penetrating type, clamping type, injection type, etc., and their installation positions are evenly distributed on the inner core according to the requirements of support. The mechanical inserts can also be embedded and cast into the inner core.

[0009] When the inner core is formed by 3D printing, machining and surface coating are required to ensure the accuracy and surface quality of the inner core.

[0010] After the inner core is made, install the fixing mechanical inserts at the designated positions (or directly make the inserts in the inner core when making the inner core). Then, connect the inner core and the support structure member through a certain mechanical connection (such as threading, quick plugging or clamping) to form a complete tire inner core (as shown in Figure 5). After the inner core is made, install this inner core into the tire mold for casting (as shown in Figure 6), and position and fix it through the support structure member. The support position of the inner core can be on the side of the tire (as shown in Figure 6), or at the inner pressure-bearing ring of the tire (as shown in Figure 7).

[0011] During pouring, the inner pressure-bearing ring, carcass, and tread of the tire are poured separately (CN110561979A). The pouring sequence is as follows: first pour the tread (the process is shown in CN110948764A) and the inner pressure-bearing ring (as shown in Figure 8). After the inner pressure-bearing ring is formed, an inner core and carcass components are installed in the mold, and then the carcass is poured (as shown in Figure 9). At the same time, when pouring the tread, a part of the space where the tread contacts the carcass is left unfilled with rubber. After the carcass is poured and formed, belt plies at different angles are wound around the carcass. After closing the mold again, the reserved part of the tread is poured, so that the entire tire is formed. When the inner core support structure needs to support from the inner pressure-bearing ring part, the pouring of the inner pressure-bearing ring can be carried out after the carcass is poured and formed.

[0012] After pouring is completed, the tire and the inner core are taken out of the mold together. The tire with the inner core is placed in the post-curing chamber, and at the same time, the inner core support structure is disassembled. During the post-curing process, the inner core is heated through the mechanical inserts on the inner core to connect the pre-buried heating wires in the inner core, so that it not only provides heat for the post-curing of the tire but also melts the inner core material into a liquid. When the post-curing is about to end, the channel (breathing hole) left when the support structure is disassembled is opened, and the melted liquid inner core is pumped out. Finally, the mechanical inserts and the pre-buried heating wires are taken out and cleaned. The filterable meltable material in the liquid state is filtered and then transported back to the tire inner core manufacturing process together with the cleaned mechanical inserts and heating wires to complete the cycle of the entire process.

[0013] Preferably, the meltable material is paraffin wax for machining.

[0014] Preferably, the meltable material is a low-melting-point metal, such as an alloy of elements such as bismuth, cadmium, tin, lead, dysprosium, indium, etc.

[0015] Preferably, the tire inner core material can be a mixture of multiple materials.

[0016] Preferably, materials such as fibers and powders can be added to the meltable material to improve the material properties.

[0017] Preferably, the melting point of the meltable material should be more than 20 °C lower than the post-curing temperature.

[0018] Preferably, when manufacturing the tire inner core, the meltable material is used for injection molding, casting molding, direct processing molding, 3D printing, or multiple methods are used simultaneously, such as reprocessing after casting.

[0019] Preferably, when manufacturing the tire inner core, the inner core can be manufactured by assembling multiple shapes.

[0020] Preferably, the heating device can be a heating wire, a hollow hose for passing hot air or hot oil, a channel for directly passing hot air, etc., which is convenient for accelerating the melting speed in the later stage.

[0021] Preferably, electromagnetic technology is used for melting the tire inner core.

[0022] Preferably, when the tire inner core is partially fusible, microwave heating can be adopted.

[0023] Preferably, the heating wire is soft, wrapped with heat-insulating and high-temperature-resistant materials on the outside and uses electric heating.

[0024] Preferably, when placing the heating wire, a tooling is used to arrange it to the specified position.

[0025] Preferably, a temperature measuring device is installed on the heating wire.

[0026] Preferably, the mechanical insert can be used as a discharge channel.

[0027] Preferably, the discharge channel is blocked by a connector during heating.

[0028] Preferably, the parts in the inner core support structure are made of Teflon or sprayed with Teflon on the surface.

[0029] Preferably, numerical control equipment is used for machining and precision finishing.

[0030] Preferably, the mechanical insert is a hollow threaded pipe with a plug-in structure.

[0031] Preferably, there are reed pieces for heating and side position connection inside the mechanical insert.

[0032] Preferably, the inner core support structure is installed on the lower side plate or on the inner pressure-bearing ring component.

[0033] Preferably, the mechanical connection is a threaded connection.

[0034] Preferably, the inner core isolation film is coated by spraying, and its material is a polymer material or a metal material.

[0035] Preferably, the melting point of the inner core isolation film is higher than that of the body material.

[0036] Preferably, when the liquid inner core is drawn out, it is discharged by gravity.

[0037] Preferably, when the liquid inner core is drawn out, a high-temperature pump is used for the drawing operation.

[0038] Preferably, after the liquid inner core is drawn out and processed, it directly enters the inner core re-forming process.

[0039] Preferably, when the mechanical insert and the heating wire are drawn out, a mechanical coiling tooling is used to prevent thermal injury to the operator.

[0040] Preferably, when the carcass is cast, the inner pressure ring needs to have a certain strength.

[0041] Preferably, the casting time of the carcass is parallel to the casting time of the tread.

[0042] Preferably, after the product is cured, a special mold opening and closing tooling is used for mold opening.

[0043] The tire forming process and the inner core for forming provided by the present invention have the following technical effects:

[0044] 1. Solve the problem of forming the internal space of the liquid-cast tire.

[0045] 2. Make the shape of the internal space of the tire diverse. The internal diverse structure improves various performances of the tire.

[0046] 3. This process greatly shortens the time for structural improvement, can quickly carry out structural adjustment in the shortest time, and improves the R & D speed of new products.

[0047] 4. The fusible material can be recycled directly into the production cycle, saving production costs.

[0048] 5. The embedded heating device provides heat for the post-vulcanization of the tire material by heating the inner core, accelerating the post-vulcanization speed and improving production efficiency.

[0049] 6. Most of the fusible materials have the characteristic of adjustable melting point, expanding the types of liquid polymers that can be used.

[0050] 7. The application of the fusible material inner core makes it possible to diversify the internal cavity structure of the tire, can manufacture more complex internal structures of the tire and enable the tire to have more functions, such as explosion-proof, etc. Brief Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0052] Figure 1 Tire capsule Figure;

[0053] Figure 2 Core filling Figure;

[0054] Figure 3 Core mold closing and filling Figure;

[0055] Figure 4 Core mechanical insert structure Figure

[0056] Figure 5 Schematic of core support structure Figure;

[0057] Figure 6 Tire mold for casting Figure;

[0058] Figure 7 Inner pressure ring support structure Figure;

[0059] Figure 8 Inner pressure ring casting step-by-step mold Figure;

[0060] Figure 9 Carcass casting step-by-step mold Figure;

[0061] Figure 10 Cross-section of the non-pneumatic tire 650 - 10;

[0062] Figure 11 Cross-section of the enclosed tire 23.5R25;

[0063] Figure 12 Simplified structure diagram of the tire 650R10;

[0064] Figure 13 Simplified structure diagram of the inner core of the tire 650R10;

[0065] Explanation of reference numerals in the drawings:

[0066] 1. Inner core; 2. Mechanical insert; 3. Structural support; 4. Upper side plate; 5. Pattern block; 6. Outer mold sleeve; 7. Lower side plate; 8. Steel rim; 9. Inner pressure ring forming part. Detailed implementation manners

[0067] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0068] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, the elements defined by the statement "comprising..." or "including..." do not exclude the presence of additional elements in the process, method, article or terminal device including the said elements. In addition, in this article, "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number.

[0069] The inner core is manufactured using a special forming mold. The characteristics are that both the upper and lower molds of the mold are opened, a part of the material is injected to form the first material layer, then some heating wires and other inserts are embedded, and then some more material is injected to form the second material layer until the half mold is filled with the third material layer (as shown in Figure 2). After both the upper and lower molds of the inner core mold are respectively filled, it is cooled for a period of time until the material solidifies and shrinks, and then the molds are closed. The material of the intermediate layer is injected through the reserved injection channels, so that the embedded components can be reasonably distributed at the designated positions. The upper mold is also provided with a mold-closing injection hole for injecting the material of the intermediate layer after mold closing. When injecting the intermediate layer, it should be noted that the injection material temperature should be 50 - 60 °C higher than the melting point of the material to ensure the fluidity of the material. When injecting the material, a feeding bin is installed at the injection port, and there should be enough material in the feeding bin and it is heated to keep it in a molten state to ensure that there are no cavities on the inner core due to material shrinkage.

[0070] During layered pouring, corresponding outlet holes should be left for the joints of the embedded heating wires or mechanical inserts should be directly installed.

[0071] For materials with a large shrinkage rate, it should be noted that the mold cannot be opened after it is completely cooled to prevent defects such as product cracking and stress concentration caused by shrinkage.

[0072] After the inner core semi-finished product is taken out of the mold, it needs to be placed in a special cooling chamber and gradually cooled to room temperature. After obtaining a semi-finished product that can be finely processed, a CNC lathe is used for fine machining of the outer contour, and a CNC machine tool (electrical discharge machining is also used for metal materials) is used to machine the required shape. After machining is completed, an isolation film is sprayed on the surface. The production of the inner core is completed.

[0073] As shown in Figure 6, the tire casting mold provided in this embodiment is divided into three sections, which are respectively used for the forming of the tread, carcass, and inner pressure ring. According to the different structures of the tire, the mold may also have a part for sidewall forming. According to the pouring sequence of the tire mold, first the tread is poured. When the inner core is fixed on the side plate, the inner pressure ring is poured while pouring the tread. When the inner core is fixed on the inner pressure ring component, the outer mold of the inner pressure ring is assembled as shown in Figure 7. First, the carcass is poured, and then the inner pressure ring is poured after the carcass is formed. When pouring the tread, a part of the space where the tread contacts the carcass is left without injecting glue. After the carcass is poured and formed, belt plies at different angles are wound around the carcass, and then the mold is closed again to pour the reserved tread part, so that the whole tire is formed.

[0074] After pouring is completed, after the tire solidifies, the tire and the inner core are taken out of the mold together. The tire with the inner core is placed in the post-curing chamber, and at the same time, the inner core support structure is removed from the tire and the channels left when the support structure is removed are blocked to prevent the previously melted material from flowing out through the channels when the inner core melts.

[0075] During the post-vulcanization process, the inner core is heated by connecting the pre-buried heating wire in the inner core through the mechanical insert on the inner core, so that it not only provides heat for the post-vulcanization of the tire but also melts the inner core material into a liquid. When the post-vulcanization is about to end, the channel left when the support structure is removed is opened to extract the melted liquid inner core. Finally, the mechanical insert and the pre-buried heating wire are taken out and cleaned. The meltable material in the liquid state is filtered and then re-transported back to the tire inner core manufacturing process together with the cleaned mechanical insert and heating wire to complete the cycle of the entire process.

[0076] The actual production process of the inner core and the production process is illustrated by the following examples:

[0077] Example 1, taking the production process of an inner-supported tire with a specification of 650-10 (the structure is shown in Figure 10) and using multiple split inner cores as an example.

[0078] When producing a tire with a specification of 650-10, the inner core uses paraffin with a melting point of 100 °C as the production material, and its production process is as follows:

[0079] First, control the temperature of the inner core forming wax mold (hereinafter referred to as the wax mold) at 60 °C, open the upper and lower molds, heat the wax raw material to 120 °C, and inject 10% of the material into the upper and lower molds respectively to ensure that the metal surfaces of the upper and lower molds are completely covered by the wax material.

[0080] After the injected wax material cools down to 80 °C, use the wiring tooling to lay the heating wire into the upper and lower molds, and continue to inject wax material until it is full. Ensure that the material completely covers the heating wire during injection. The mechanical insert is installed at the joint of the heating wire and buried in the wax material together with the heating wire.

[0081] When the temperature of the wax material for the second injection drops to 70 °C, remove the injection port component of the upper mold, close and lock the upper and lower molds. Install the feeding bin on the four injection ports and inject the material. Keep the temperature of the feeding bin above 100 °C and continuously cool the wax mold to 40 °C. Remove the feeding bin.

[0082] After taking out the semi-finished inner core formed in the mold, place it flat on the storage rack and cool it to room temperature.

[0083] The outer contour of the cooled inner core is machined on a CNC lathe. Before machining, measure the roundness on the lathe. Inner cores with a roundness and surface runout exceeding 3 mm are directly scrapped and returned to the inner core forming process for re-molding.

[0084] After machining, use a heating tool to remove the wax above the mechanical insert and install the hollow threaded rod for support.

[0085] Using the above method, multiple inner cores are processed respectively, and then the multiple inner cores are assembled into one body through the inserts and then assembled onto the lower side plate of the mold.

[0086] Pour the tread and the inner pressure ring in sequence according to the pouring order, install the inner pressure ring and the inner pressure ring components on the lower side plate, then install the upper side plate and the outer tread mold, and pour the tread with polyurethane material.

[0087] After the tread is cast and formed, open the outer tread mold, wind the belt layers at different angles around the tread, install the completed tread and the tread mold, and then pour the reserved contact space between the tread and the tread again after closing the mold, so that the whole tire is formed.

[0088] After the casting and forming is completed, take out the tire and the inner core from the mold together. Put the tire with the inner core into the post-curing chamber, at the same time remove the inner core support screw rod from the tire and pull out the heating wire from the tire, and block the threaded hole on the lower side of the tire with a rubber plug. Electrify and heat the inner core, control the temperature of the heating wire at 80 - 90 °C, and continuously heat for 2 - 3 hours. During this period, observe the melting condition of the material in the mold through an endoscope. After all the inner cores are melted, open the bottom rubber plug and drain all the wax materials.

[0089] After the wax material is drained, filter it through a filter screen and then re-inject it into the previously emptied wax mold. Put the tire into the post-curing chamber and continue to cure for 10 hours to complete the curing.

[0090] Example 2 takes the production process of a 23.5R25 closed tire cross-section diagram (as shown in Figure 11) using a single integral inner core as an example.

[0091] When producing a tire with a specification of 23.5R25, the inner core uses paraffin with a melting point of 90 °C and an alloy with a melting point of 120 °C as the production materials, and its production process is as follows:

[0092] First, control the temperature of the inner core forming wax mold (hereinafter referred to as the wax mold) at 60 °C, open the upper and lower molds, heat the wax raw material to 120 °C, and inject 10% of the material into the upper and lower molds respectively to ensure that the metal surfaces of the upper and lower molds are completely covered by the wax material.

[0093] After the temperature of the injected wax material drops to 70 °C, use a wiring tooling to lay the heating wire into the upper and lower molds, and continue to inject the wax material to the parting surface. Ensure that the material completely covers the heating wire during injection. Install a mechanical insert at the joint of the heating wire and bury it in the wax material together with the heating wire.

[0094] When the temperature of the wax material for the second injection drops to 60 °C, remove the injection port component installation support structure on the upper mold, connect the mechanical inserts installed in the upper and lower molds into one body, close and lock the upper and lower molds. Install a feed bin on the four injection ports and inject the material. Keep the temperature of the feed bin above 90 °C and continuously cool the wax mold to 60 °C. Remove the feed bin. Block the injection ports, and then install the whole wax mold on a flipping device to make the wax mold flip continuously during the remaining cooling process to ensure that the shrinkage cavity inside the inner core is uniform.

[0095] After cooling to 40°C, open the mold. After taking out the semi-finished product inner core formed in the mold, place it flat on the storage rack and cool it to room temperature.

[0096] On the cooled inner core, machine the outer contour on a CNC lathe. Before machining, measure the roundness on the lathe. For inner cores with roundness and surface runout exceeding 3 mm, directly scrap them and return them to the inner core forming process for re-modeling.

[0097] After machining, use a heating tool to remove the wax above the mechanical insert and install a hollow threaded rod for support. After installation, spray the alloy, and control the coating thickness within 0.1 mm - 0.15 mm. After completion, transfer to the winding process and wind the steel cord. After winding, assemble it onto the mold.

[0098] Install the mold tread and carcass into the rotating equipment and pour the tread and carcass respectively using polyurethane material. After the carcass is cast and formed, open the outer mold of the carcass, wind the belt layers at different angles on the carcass, install the completed tread and the tread mold, close the mold again, and pour the reserved contact space between the tread and the carcass, and at the same time pour the inner pressure ring to make the whole tire formed.

[0099] After the casting and forming is completed, take out the tire and the inner core together from the mold. Put the tire with the inner core into the post-cure chamber, and at the same time remove the inner core support threaded rod from the tire and pull out the heating wire from the tire. Power on to heat the inner core, control the heating wire temperature at 80 - 90°C, and continuously heat for 2 - 3 hours. During this period, observe the melting situation of the material in the mold through an endoscope. After all the inner cores are melted, use a pumping device to pump out all the wax materials.

[0100] After the wax is discharged, filter it through a filter screen and re-inject it into the previously emptied wax mold. Put the tire into the post-cure chamber and continue to cure for 10 hours to complete the curing.

[0101] Example 3, taking the production process of a radial tire with a specification of 650R10 (as shown in Figure 12, see Patent CN110561979A) as an example, using a partially fusible inner core.

[0102] When producing a tire with a specification of 650R10, the inner core (structure shown in Figure 13) uses an aluminum material with a Teflon coating on the surface and paraffin with a melting point of 100°C as the production materials, and its structure is a multi-piece splicing structure. Its production process is as follows:

[0103] Design aluminum inner core blocks that can be removed using a mechanical structure according to the inner core shape and wax blocks designed for the removal of the aluminum inner core blocks. The parting lines are as shown in Figure 13. Assemble the completed aluminum inner core blocks and wax blocks into one body and spray a layer of polymer material on the outside. Complete the production of the inner core.

[0104] Manufacture according to the tire manufacturing process in Patent CN110561979A. After completion, take out the tire with the inner core, use a heat source to melt and extract the wax block in the inner core. Then use a gripping manipulator to take out the aluminum inner core block to obtain the completed tire. Place the tire in the vulcanization chamber and continue vulcanization for 10 hours to complete vulcanization.

[0105] The above tire forming process and the inner core for forming have the following technical effects:

[0106] 1. Solve the problem of forming the internal space of liquid-poured tires.

[0107] 2. Make the shape of the internal space of the tire diverse. The internal diverse structure improves various performances of the tire.

[0108] 3. This process greatly shortens the time for structural improvement, can quickly adjust the structure in the shortest time, and improves the R & D speed of new products.

[0109] 4. The recyclable molten material can directly enter the production cycle, saving production costs.

[0110] 5. The embedded heating device provides heat for the post-vulcanization of the tire material by heating the inner core, accelerating the post-vulcanization speed and improving production efficiency.

[0111] 6. Most of the fusible materials have the characteristic of adjustable melting point, expanding the types of liquid polymers that can be used.

[0112] 7. The application of the fusible material inner core makes it possible to diversify the inner cavity structure of the tire, can manufacture more complex tire internal structures and enable the tire to have more functions, such as explosion-proof, etc.

[0113] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A process method for tire forming during tire production. In this process, a meltable material is used to make the tire inner core (1), which is placed inside the tire mold through mechanical inserts (2) and structural supports (3). Liquid raw materials are used, and the tire carcass, tread, and inner pressure-bearing ring are formed through the upper side plate (4), lower side plate (7), tread blocks (5), outer mold sleeve (6), and the inner pressure-bearing ring forming part (9) installed with a steel ring (8). During the tire forming process, the material of this inner core (1) can maintain good strength. During the post-vulcanization process, this inner core (1) is melted into a liquid and discharged through the discharge channels reserved on the tire, thus realizing the forming of the tire. Among them, The mechanical insert (2) is a hollow threaded tube with a plug-in structure; According to the pouring sequence of the tire mold, the tread is poured first. When the inner core (1) is fixed on the side plate, the inner pressure ring is poured while pouring the tread. When the inner core (1) is fixed on the inner pressure ring component, the outer mold of the inner pressure ring is assembled. The carcass is poured first, and then the inner pressure ring is poured after the carcass is formed; When pouring the tread, a part of the tread contact space with the carcass is left unfilled with glue. After the carcass is poured and formed, belt plies at different angles are wound around the carcass. After closing the mold again, the reserved tread part is poured, so that the whole tire is formed; The inner core (1) has a discharge channel that partially or completely overlaps with the mechanical insert (2) and the support structure member (3) in the inner core (1); the mechanical insert (2) and the support structure member (3) have clear positioning in the inner core (1), providing improvements in performance such as support, positioning, and enhanced part strength for the inner core (1); Among them, the layered pouring process of the inner core (1) includes the following steps: First, a fusible material is used to make the inner core (1). First, both the upper and lower molds of the inner core (1) mold are opened, and part of the material is injected to form layer one of the material. Then, part of the heating wire and other inserts are embedded, and then part of the material is injected to form layer two of the material until the half mold is filled with layer three of the material; After both the upper and lower molds of the inner core (1) mold are filled respectively, they are cooled for a period of time until the material solidifies and shrinks, and then the mold is closed and the intermediate layer is injected to form the whole product; After all the material is injected into the mold, the mold is continuously placed in multiple low-temperature chambers at different temperatures for cooling according to a fixed time; During cooling, there is enough material in the feed bin to ensure shrinkage compensation after cooling. After cooling, the semi-finished product is taken out and enters the machining process. The outer shape of the semi-finished product is finely repaired and pre-grooved or pre-drilled at the position of the mechanical insert (2); After machining is completed, an isolation film is coated on the surface, and the inner core (1) is made; When the inner core (1) is formed by 3D printing, machining and surface coating are required to ensure the accuracy and surface quality of the inner core (1); After the inner core (1) is made, the fixing mechanical insert (2) is installed at the specified position or the insert is directly made into the inner core (1) when making the inner core (1); Then, the inner core (1) is connected to the support structure member through mechanical connection, so that the inner core (1) and the support structure member form a complete tire inner core (1); After the inner core (1) is made, this inner core (1) is installed in the tire mold for pouring, and it is positioned and fixed through the support structure member. The support position of the inner core (1) is at the tire side or the tire inner pressure ring; 2. The tire inner core (1) in the process according to claim 1, characterized in that, The melting point of the fusible material is above the pouring temperature of the liquid material and below the vulcanization temperature; various polymer, metal, and non-metal materials can be selected as the material; a variety of materials can be mixed and used according to actual production needs; 3. The tire inner core (1) in the process according to claim 1, characterized in that, The shape of the inner core (1) is any machinable shape, and its forming process is injection molding, casting molding, machining, 3D printing, or a combination of the above multiple forming processes; 4. The tire inner core (1) in the process according to claim 1, characterized in that, Various heating devices can be added during the production process of the inner core (1).

5. The tire inner core (1) in the process according to claim 1, characterized in that, During the production process of the inner core (1), a layer of isolation material such as polymer materials like polyethylene or various sprayed metal materials can be sprayed on the surface to prevent the product from being miscible with or infiltrating into the inner core (1).

6. The tire inner core (1) in the process according to claim 1, characterized in that, During the production process of the inner core (1), various fillers can be added to enhance its strength.

7. The tire inner core (1) in the process according to claim 1, characterized in that, The inner core (1) can adopt a method where some parts can be melted.

8. The process according to claim 1, characterized in that, Install the steel ring (8) and the inner pressure-bearing ring component in the mold, inject liquid polymer material to complete the manufacture of the inner pressure-bearing ring; after closing the upper side plate (4), the lower side plate (7) and the carcass component, start pouring the carcass; after partial curing, open the carcass component, install the tread block (5) with a partially poured tread and the outer mold sleeve (6), and start pouring the joint part of the tread and the carcass; after the pouring is completed, the pouring of the whole tire is completed.

9. The tire and manufacturing process according to claim 8, characterized in that, After the overall molding step, it further includes: After all the pouring is completed, adjust to the specified temperature; remove the mold and the product as a whole from the equipment and place them in a constant temperature chamber for curing; After the product curing is completed, open the mold, take out the product, and place it in a constant temperature chamber for post-curing. During or after the post-curing process, remove the inner core (1). The inner core (1) can be removed from the inside of the tire by melting or partial melting method; after removal, the whole product is obtained.

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