A rubber strip type tire molding turnup capsule

Abstract

The application discloses a rubber strip type tire forming reverse packing capsule, wherein the rubber strip and the supporting block are integrated, when the rubber strip locks the tire steel ring, the supporting block drives the capsule to move synchronously in the diameter direction, the material for preparing the tire is not stressed in the transverse direction, thus the left and right movement is not generated, the slippage of the reverse packing capsule in the lifting process of the supporting block is solved, the material slippage is further generated, the material positioning precision is influenced, the tire product manufacturing quality is improved, the capsule and the supporting block move synchronously, no friction is generated, thus the capsule cannot be abraded and the supporting block cannot be polluted, the abrasion hole of the capsule is avoided, the service life of the capsule is improved, the material used by the reverse packing capsule is reduced, and the manufacturing cost is saved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rubber tire production, and particularly relates to a rubber strip type tire forming reverse coating capsule. BACKGROUND

[0002] Tire forming reverse coating technology is divided into mechanical reverse coating and capsule reverse coating. Mechanical reverse coating is gradually abandoned by tire manufacturers because reverse coating wheels will produce indentation type bulges on tires. The capsule reverse coating technology effectively avoids the problem, and more and more tire manufacturers choose the forming capsule reverse coating technology. The tire forming capsule reverse coating technology is a process of stretching the tire side by using the inflation and expansion of the reverse coating capsule when the tire blank is formed, and the tire side is reverse coated on the tire body. The reverse coating capsule is uniform in the circumferential direction when inflated and expanded, so the stretching of the tire side is also uniform, and therefore the indentation type bulges caused by mechanical reverse coating will not occur.

[0003] The current forming capsule reverse coating technology has the following problems: 1. The capsule is located above the support block, and the two are completely independent. During the lifting process of the support block, the capsule will rub with the support block, and the capsule will also shift left and right to offset the difference in the radial direction of the support block during lifting. Since the tire material is attached to the surface of the capsule, the movement of the capsule will cause the material to slide left and right, reducing the positioning accuracy of the material; 2. The support block will also rub with the capsule during repeated lifting, causing the thickness of the capsule support block part to become thinner, eventually causing the material distribution of the toe port part of the tire to change, and the wear of the capsule will cause the capsule to be damaged; 3. The worn rubber powder will stick to the support block, which will affect the smoothness of the lifting of the support block, and needs to be improved. SUMMARY

[0004] The present application provides a rubber strip type tire forming reverse coating capsule, which can solve the above technical problems.

[0005] To solve the above problems, the technical scheme provided by the present application is as follows:

[0006] The present application provides a rubber strip type tire forming reverse coating capsule, which can solve the above technical problems.

[0007] The rubber strip (1) is embedded in the support block (5) below it so that the rubber strip (1) and the support block (5) are connected as a whole. When the rubber strip (1) moves up and down synchronously with the support block (5), the rubber strip (1) locks the steel wire ring of the tire. The rubber strip (1) only moves in the up and down direction and does not move laterally in the left and right direction, so as to avoid the material of tire preparation from slipping in the left and right direction, thereby improving the stability of the material positioning on the tire preparation.

[0008] The inner opening (3) and the outer opening (4) are fixed on the tire forming drum and play a sealing role to ensure that the inverted capsule does not leak air when it is inflated. The expansion of the inverted capsule stretches and inverts the tire sidewall.

[0009] The inner opening (3) includes a 45-degree nylon skeleton (302), which ensures that the inner opening (3) has a certain deformation when the support block (5) is raised, and can return to its original shape without deformation when the support block (5) falls back; the capsule body (2) includes right-direction 75-degree nylon cord fabric (202) and left-direction 75-degree nylon cord fabric (204) that are cross-distributed. The right-direction 75-degree nylon cord fabric (202) and left-direction 75-degree nylon cord fabric (204) also extend into the rubber strip (1), which serves to increase the strength of the rubber strip (1) on the one hand, and to enable the inverted capsule to be squeezed from the root of the tire bead when it is inflated, so as to ensure that the tire bead does not come off.

[0010] According to an optional embodiment of the present invention, the support block (5) is provided with a first groove structure facing the rubber strip (1), and the rubber strip (1) is fitted to the first groove structure; the surface of the rubber strip (1) is also provided with a second groove, the second groove is used to fix the tire wire ring, and a layer of silicone (102) is coated on the second groove so that the tire can be easily separated from the rubber strip (1) after molding; the rubber strip (1) is filled with rubber material (101).

[0011] According to an optional embodiment of the present invention, the bladder body (2) includes a first lining adhesive (201), a right-hand 75-degree nylon cord fabric (202), a release adhesive (203), a left-hand 75-degree nylon cord fabric (204), a first surface adhesive (205), and a high-elastic fabric (207); the right-hand 75-degree nylon cord fabric (202) and the left-hand 75-degree nylon cord fabric (204) increase the strength of the bladder body (2), and the high-elastic fabric (207) is used to isolate the tire sidewall and the bladder, so as to prevent the tire sidewall from sticking to the bladder and being unable to detach.

[0012] According to an optional embodiment of the present invention, one end of the left-facing 75-degree nylon curtain (204) extends to the outer toe opening (4) and forms an enclosure structure, wherein an outer toe opening core (206) is provided within the enclosure structure.

[0013] According to an optional embodiment of the present invention, the inner opening (3) includes a second lining adhesive (301), a 45-degree nylon skeleton (302), a second surface adhesive (303), and a toe opening adhesive core (304); the 45-degree nylon skeleton (302) is used to buffer the stroke difference generated during the lifting and lowering of the support block (5).

[0014] According to an optional embodiment of the invention, the 45-degree nylon skeleton (302) also extends into the adhesive strip (1).

[0015] According to an optional embodiment of the present invention, the bottom of the inner opening (3) is flush with the bottom of the outer opening (4).

[0016] Beneficial Effects: This invention provides a rubber strip-type tire molding reverse-wrapping capsule. In this capsule, the rubber strip and support block are integrated. When the rubber strip locks the tire's steel wire ring, the support block drives the capsule to move synchronously in the diametrical direction. The tire material is not subjected to lateral force, thus preventing lateral movement. This solves the problem of slippage during the support block's rise and fall, which in turn causes material slippage and affects material positioning accuracy, improving tire manufacturing quality. The capsule and support block move synchronously up and down without friction, preventing wear and powder from contaminating the support block and avoiding wear-through problems, thus extending capsule lifespan. Furthermore, the reverse-wrapping capsule uses less material, saving manufacturing costs. The key component of the capsule, the rubber strip, connects to the capsule body and inner opening, sealing them through the inner and outer openings to ensure the reverse-wrapping capsule is leak-proof during inflation and can expand and stretch the tire sidewall normally, effectively wrapping the tire sidewall. The capsule body consists of two layers of intersecting nylon skeletons and multiple layers of rubber sheets. The nylon skeleton extends into the rubber strip, increasing its strength. The rubber strip features a grooved curved surface design, the shape and size of which need to be designed according to the tire specifications and bead width. This design not only solves the problem of inaccurate material slippage and positioning, improving tire manufacturing quality, but also saves materials and reduces manufacturing costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the reverse-packing capsule locking state of a two-drum forming machine in the prior art.

[0019] Figure 2 This is a schematic diagram of a two-drum forming machine in the prior art, showing the capsule in an unlocked state.

[0020] Figure 3 This is a schematic diagram of the reverse-packing capsule locking state of a three-drum forming machine in the prior art.

[0021] Figure 4 This is a schematic diagram of an existing three-drum forming machine in the state of an unlocked capsule.

[0022] Figure 5 This is a schematic diagram of the structure of a rubber strip type tire molding reverse-encapsulated capsule provided in an embodiment of this application.

[0023] Figure 6 This is a schematic diagram of the structure of an adhesive strip provided in an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of the structure of a capsule body provided in an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the structure of an inner port provided in an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] like Figure 1 and Figure 2 As shown, in the prior art, the two ends of the reverse-packing capsule 11 in the two-drum forming machine are provided with an inner opening 12 and an outer opening 13. A support block 14 is provided on the inner side of the bottom left side of the reverse-packing capsule 11. When an upward force is applied to the support block 14, the reverse-packing capsule 11 is in a locked state. Figure 3 and Figure 4 As shown, in the prior art, the two ends of the reverse-packing capsule 21 of the three-drum forming machine are provided with an inner opening 22 and an outer opening 23. A support block 24 is provided on the outer side of the bottom left side of the reverse-packing capsule 21. When an upward force is applied to the support block 24, the reverse-packing capsule 21 is in a locked state.

[0028] Combination Figure 1 and Figure 3In existing two-drum or three-drum tire forming machines, the bladder is fixed to the tire forming drum via an inner and outer inlet. When the support block is locked, the bladder above the support block shifts as the support block's stroke increases to compensate for the change in stroke. This causes friction between the support block and the bladder, and the material adhering to the bladder moves with the bladder's displacement, ultimately leading to inaccurate material positioning and reduced accuracy. The support block also rubs against the bladder during repeated lifting and lowering, causing the thickness of the bladder-support area to decrease, ultimately altering the material distribution at the tire bead. Furthermore, bladder wear can lead to bladder damage; worn rubber powder adheres to the support block, affecting the smoothness of its lifting and lowering.

[0029] This invention provides a rubber strip-type tire forming reverse-wrapping capsule, which solves the aforementioned technical problems. The rubber strip-type tire forming reverse-wrapping capsule of this invention integrates the rubber strip and the support block. When the rubber strip locks the tire's steel wire ring, the support block drives the capsule to move synchronously in the diametrical direction. The tire material is not subjected to lateral force, thus preventing lateral movement. This solves the problem of slippage during the lifting and lowering of the support block in current reverse-wrapping capsules, which causes material slippage and affects material positioning accuracy, thereby improving tire manufacturing quality. The capsule and support block move synchronously up and down without friction, preventing wear and powdering that could contaminate the support block. Capsule perforation is also avoided, extending capsule lifespan. Furthermore, the capsule uses less material, saving manufacturing costs.

[0030] Specifically, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the rubber strip type tire forming reverse capsule includes a rubber strip 1, a capsule body 2, an inner opening 3, an outer opening 4, and a support block 5. The outer opening 4 is provided at the bottom right side of the capsule body 2, and the rubber strip 1 is connected to the left end of the capsule body 2 and the inner opening 3.

[0031] The rubber strip 1 is embedded in the support block 5 below it, so that the rubber strip 1 and the support block 5 are connected as a whole. When the rubber strip 1 moves up and down synchronously with the support block 5, the rubber strip 1 locks the steel wire ring of the tire. The rubber strip 1 only moves in the up and down direction and does not move laterally in the left and right direction, so as to avoid the material of tire making from slipping in the left and right direction, thereby improving the stability of the material positioning on the tire.

[0032] The inner bezel 3 and outer bezel 4 are fixed to the tire forming drum, serving a sealing function to ensure that the inverted capsule does not leak air during inflation. The expansion of the inverted capsule stretches and inverts the tire sidewall. The inner bezel 3 includes a 45-degree nylon skeleton 302, which ensures that the inner bezel 3 has a certain deformation when the support block 5 is raised, and can return to its original shape without deformation when the support block 5 falls back. The capsule body 2 includes cross-distributed right-hand 75-degree nylon cord fabric 202 and left-hand 75-degree nylon cord fabric 204, which also extend into the rubber strip 1. On the one hand, they increase the strength of the rubber strip 1, and on the other hand, they allow the inverted capsule to squeeze from the root of the tire bead during inflation, ensuring that the tire bead does not come off.

[0033] like Figure 6 As shown, the support block 5 has a first groove structure facing the rubber strip 1, and the rubber strip 1 is fitted into the first groove structure. The surface of the rubber strip 1 also has a second groove, which is used to fix the tire wire ring. A layer of silicone 102 is coated on the second groove, allowing the tire to easily detach from the rubber strip 1 after molding. The rubber strip 1 is filled with rubber material 101. In this embodiment, the capsule portion covering the support block 5 is designed as a rubber strip 1 of a certain shape, embedded inside the support block 5. The rubber strip 1 moves up and down synchronously with the rise and fall of the support block 5, locking the tire wire ring. This solves the problem of the reverse-encased capsule moving left and right, causing the material to move left and right, ensuring accurate and non-offset positioning of the material.

[0034] like Figure 7 As shown, the bladder body 2, from the inside out, includes a first lining adhesive 201, a right-facing 75-degree nylon cord fabric 202, a separating adhesive 203, a left-facing 75-degree nylon cord fabric 204, a first surface adhesive 205, and a high-elastic fabric 207. One end of the left-facing 75-degree nylon cord fabric 204 extends to the outer toe opening 4 and forms an enclosing structure. An outer toe opening adhesive core 206 is provided inside this enclosing structure. The right-facing 75-degree nylon cord fabric 202 and the left-facing 75-degree nylon cord fabric 204 are cross-bonded to increase the strength of the bladder body 2. The high-elastic fabric 207 is used to isolate the tire sidewall and the bladder, preventing the tire sidewall from sticking to the bladder and becoming unable to detach. Figure 7 Combination Figure 6 The nylon curtain 202 at a 75-degree angle to the right and the nylon curtain 204 at a 75-degree angle to the left extend into the rubber strip 1.

[0035] like Figure 8 As shown, the inner opening 3 includes a second lining adhesive 301, a 45-degree nylon skeleton 302, a second surface adhesive 303, and a toe opening adhesive core 304. The 45-degree nylon skeleton 302 serves to cushion the stroke difference generated during the lifting and lowering of the support block 5. The 45-degree nylon skeleton 302 also extends into the adhesive strip 1, see reference. Figure 6The bottom of the inner aperture 3 is flush with the bottom of the outer aperture 4, making it easy to fix to the tire forming drum.

[0036] The key features of this invention are the rubber strip 1 and the inner bead 3. The surface of the rubber strip 1 is designed with a grooved curved surface to fix the material in the tire bead area. Its shape and size need to be designed according to the tire specifications and the width of the bead. This design not only solves the problem of inaccurate positioning due to material slippage and improves tire manufacturing quality, but also saves materials and reduces manufacturing costs. Since the rubber strip 1 only moves vertically and not laterally, it will not cause material slippage in the left-right direction, thus improving the stability of material positioning.

[0037] The key component of the inverted capsule of this invention, the rubber strip 1, is connected to the capsule body 2 and the inner opening 3. It is sealed by the inner opening 3 and the outer opening 4, ensuring that the inverted capsule is airtight during inflation and can expand and stretch the tire sidewall normally to invert it. The inner opening 3 includes a layer of large-angle nylon skeleton, ensuring that the inner opening 3 has a certain deformation when the support block 5 is raised, and can return to its original shape without deformation when the support block falls back. The capsule body 2 includes two cross-distributed layers of nylon cord fabric, which extend into the rubber strip 1 inside the support block 5. This increases the strength of the rubber strip 1 and allows the inverted capsule to squeeze from the root of the tire bead during inflation, ensuring that the bead does not detach.

[0038] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A rubber strip type tire molding reverse-wrapping capsule, characterized in that, It includes a rubber strip (1), a bag body (2), an inner opening (3), an outer opening (4), and a support block (5); the outer opening (4) is provided at the bottom right side of the bag body (2), and the rubber strip (1) is connected to the left end of the bag body (2) and the inner opening (3); The rubber strip (1) is embedded in the support block (5) below it so that the rubber strip (1) and the support block (5) are connected as a whole. When the rubber strip (1) moves up and down synchronously with the support block (5), the rubber strip (1) locks the steel wire ring of the tire. The rubber strip (1) only moves in the up and down direction and does not move laterally in the left and right direction, so as to avoid the material of tire preparation from slipping in the left and right direction, thereby improving the stability of the material positioning on the tire preparation. The inner opening (3) and the outer opening (4) are fixed on the tire forming drum and play a sealing role to ensure that the inverted capsule does not leak air when it is inflated. The expansion of the inverted capsule stretches and inverts the tire sidewall. The inner opening (3) includes a 45-degree nylon skeleton (302), which ensures that the inner opening (3) has a certain deformation when the support block (5) is raised, and can return to its original shape without deformation when the support block (5) falls back; the capsule body (2) includes right-direction 75-degree nylon cord fabric (202) and left-direction 75-degree nylon cord fabric (204) which are cross-distributed. The right-direction 75-degree nylon cord fabric (202) and left-direction 75-degree nylon cord fabric (204) also extend into the rubber strip (1), which serves to increase the strength of the rubber strip (1) on the one hand, and to enable the inverted capsule to be squeezed from the root of the tire bead when it is inflated, so as to ensure that the tire bead does not come off. The support block (5) is provided with a first groove structure facing the rubber strip (1), and the rubber strip (1) is attached to the first groove structure; the surface of the rubber strip (1) is also provided with a second groove, which is used to fix the tire wire ring, and a layer of silicone (102) is coated on the second groove so that the tire can be easily separated from the rubber strip (1) after molding; the rubber strip (1) is filled with rubber material (101).

2. The rubber strip type tire forming reverse-wrapped capsule according to claim 1, characterized in that, The bladder body (2) includes a first lining adhesive (201), a right-facing 75-degree nylon cord fabric (202), a release adhesive (203), a left-facing 75-degree nylon cord fabric (204), a first surface adhesive (205), and a high-elastic fabric (207). The right-facing 75-degree nylon cord fabric (202) and the left-facing 75-degree nylon cord fabric (204) increase the strength of the bladder body (2). The high-elastic fabric (207) is used to isolate the tire sidewall from the bladder, preventing the tire sidewall from sticking to the bladder and becoming unable to detach.

3. The rubber strip type tire molding reverse-wrapped capsule according to claim 2, characterized in that, One end of the left-facing 75-degree nylon curtain (204) extends to the outer toe opening (4) and forms an enclosure structure, within which an outer toe opening core (206) is provided.

4. The rubber strip type tire molding reverse-wrapped capsule according to claim 1, characterized in that, The inner opening (3) includes a second lining adhesive (301), a 45-degree nylon skeleton (302), a second surface adhesive (303), and a toe opening adhesive core (304); the 45-degree nylon skeleton (302) is used to buffer the stroke difference generated during the lifting and lowering of the support block (5).

5. The rubber strip type tire molding reverse-wrapped capsule according to claim 4, characterized in that, The 45-degree nylon skeleton (302) also extends into the adhesive strip (1).

6. The rubber strip type tire molding reverse-wrapped capsule according to claim 1, characterized in that, The bottom of the inner opening (3) is flush with the bottom of the outer opening (4).

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