Tire mold

Abstract

The utility model discloses a tire mould, relates to tire processing technical field, including lower mould and upper mould, the lower mould is fixed at the upper end of clapboard, the outside of lower mould clings to be equipped with a plurality of side mould, the bottom end in the installation box is equipped with the moving mechanism, the upper mould is fixed at the end of spring telescopic pole, the lower mould is equipped with the spring telescopic pole. The output ends of the spring telescopic rods are fixedly connected with the upper end of the filling mold, and a limiting mechanism is arranged at the upper end of the lower mold. The plurality of side molds are arranged on the outer side of the lower mold and are combined to form the annular mold, so that a patterned tire with any depth can be conveniently demolded, the tire is prevented from being adhered to the side molds by arranging the limiting mechanism, and meanwhile, the tire is prevented from being driven by the filling mold to ascend and move; and by arranging a fixed gear, the side edge molds are prevented from moving during machining, and a fixed inner gear ring can enable the multiple side edge molds to be automatically away from the tire.

Description

Technical Field

[0001] This utility model relates to the field of tire processing technology, specifically a tire mold. Background Technology

[0002] In tire manufacturing, vulcanization is a crucial process. High-temperature steam and high-pressure nitrogen are used to heat and pressurize the tire blank, causing it to solidify and form treads within a mold. To facilitate separation of the tire from the mold, tire molds are typically equipped with ejection devices to push the vulcanized tire out of the mold.

[0003] However, when the tire tread depth is deep or has inclined grooves, existing ejection devices are prone to problems during the separation of the sliding block and the tire: the deep concave structure or inclined surface of the tire tread can cause significant friction between it and the sliding block of the mold, and the tightness of the rubber's adhesion to the mold after vulcanization further exacerbates local adhesion. In this case, if the ejection force of the ejection device is unevenly distributed or unidirectional, the tire may be dragged by a certain sliding block, requiring workers to use tools to assist in demolding, making the process cumbersome.

[0004] Based on this, a tire mold is now provided that can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this utility model is to provide a tire mold to solve the problem of inconvenient demolding of tire molds in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A tire mold includes a lower mold and an upper mold. The two lower molds are symmetrically arranged above a rotating disk. A fixed shaft is fixedly provided at the bottom of the rotating disk, and the fixed shaft is rotatably disposed in a rotating hole at the upper end of the worktable. The lower molds are fixedly disposed at the upper end of a partition plate, and the partition plate is fixedly disposed inside a mounting box. The mounting box is fixedly disposed at the upper end of the rotating disk. Several side molds are closely attached to the outer side of each lower mold, and the several side molds are combined into a ring. The bottom of the mounting box is provided with a moving mechanism that drives the several side molds to open and close. The upper mold is disposed above the working position of one of the lower molds and is fixedly disposed at the end of a spring telescopic rod. The output end of the spring telescopic rod is fixedly connected to the upper end of a filling mold. The upper end of the lower mold is provided with a limiting mechanism for fixing the tire.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: both spring telescopic rods are fixedly mounted on the bottom end of the first fixed plate, both ends of the first fixed plate are fixedly connected to the output ends of two first electric cylinders, the first electric cylinders are fixedly mounted on the upper end of the fixed frame, and the fixed frame is fixedly mounted on the upper end of the workbench.

[0010] In one alternative: the filling mold has several air inlet channels in the middle, the filling mold has a connecting pipe at the upper end, the several air inlet channels are connected to the end of the connecting pipe, one end of the connecting pipe is sleeved with one end of the air pipe, one end of the air pipe is fixedly installed in the fixing hole at the upper end of the upper mold, and the other end of the air pipe is connected to an external gas delivery component.

[0011] In one alternative: one end of the fixed shaft is fixedly connected to the output end of the motor, the motor is fixedly mounted on the bottom of the worktable, and the bottom of the rotating disk is provided with a circular array of several support columns, one end of each support column is fitted with a ball bearing, and the ball bearing is in close contact with the upper end of the worktable.

[0012] In one alternative embodiment: the moving mechanism includes a connecting rod; a connecting frame is fixedly provided on one side of each side mold; the connecting frame is L-shaped; a first hinge block is fixedly provided at one end of the connecting frame; a first guide slide rod is provided at the upper end of the partition plate and at the position of the first hinge block; a connecting rod is hinged to the bottom end of each first hinge block; a second hinge block is hinged to the other end of each connecting rod; the second hinge blocks are fixedly provided on the upper end of the rotating ring; a limiting ring groove is provided at the bottom end of the rotating ring; a limiting ring is rotatably provided in the limiting ring groove; the limiting ring is fixedly provided inside the bottom end of the mounting box; a first return spring is fixedly provided at the other end of each connecting frame; a fixing tube is fixedly provided at the other end of each first return spring; the fixing tube is fixedly provided inside the mounting box; and an unfolding assembly is provided on the upper end of the worktable to drive the rotating ring to rotate, thereby unfolding the side mold.

[0013] In one alternative embodiment: the unfolding assembly includes a transmission gear, an external gear ring is fixedly provided on the outer side of the rotating ring, a transmission gear is meshed on the external gear ring, a mounting shaft is fixedly provided at the bottom end of the transmission gear, the mounting shaft is rotatably disposed in the mounting hole at the bottom end of the mounting box, a torsion spring is provided between the bottom end of the transmission gear and the bottom end of the mounting box, a fixed internal gear ring is meshed on one of the transmission gears, the fixed internal gear ring is fixedly disposed on the upper end of the worktable, and the fixed internal gear ring is fixedly disposed on the other side of the upper end of the worktable.

[0014] In one alternative: a fixed gear is meshed on one of the transmission gears, the fixed gear and the fixed internal gear ring are symmetrically arranged in the installation position, the fixed gear is set at the fixed frame position, the bottom end of the fixed gear is fixedly provided with a fixed column, the fixed column is fixedly provided on the upper end of the support plate, the support plate is fixedly provided at the output end of the second electric cylinder, and the second electric cylinder is fixedly provided in the mounting hole at the upper end of the workbench.

[0015] In one optional embodiment: the limiting mechanism includes a plurality of second guide grooves arranged in a circular array on the upper end of the lower mold, each second guide groove having a guide rod fixedly installed in each second guide groove, and each guide rod having a pressing frame slidably installed on each guide rod. The pressing frame is L-shaped, with one end of the pressing frame on the same plane as the upper end of the lower mold, and the other end of the pressing frame having a second connecting rod hinged to it. The other end of the second connecting rod is hinged to a hinge seat, and the bottom end of the hinge seat has a fixed rod fixedly installed. One end of the fixed rod extends to below the rotating disk, and the upper end of the hinge seat has a second return spring fixedly installed. The other end of the second return spring is fixedly connected to the bottom end of the lower mold. The bottom end of the filling mold has a positioning groove corresponding to the position of the pressing frame. The upper end of the support plate has a top rod fixedly installed coaxially with the fixed rod. The upper end of the worktable has a push plate installed on one side of the fixed internal gear ring. The installation position of the push plate is aligned with the position of one end of the fixed rod. The push plate is fixedly installed at the output end of the third electric cylinder, and the third electric cylinder is fixedly installed in the mounting hole on the upper end of the worktable.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention features several side molds arranged on the outer side of the lower mold, which are combined into a ring mold. This facilitates demolding of tires with tread patterns of any depth. The filling mold is separated from the upper mold, making it easy to install and remove. It also facilitates the delivery of high-temperature, high-pressure gas into the tire. By setting a limiting mechanism, the clamping frame can fix the tire when the filling mold is removed from the tire or when the side molds are away from the tire, preventing the tire from sticking to the side molds and preventing the filling mold from causing the tire to rise. By setting a fixing gear and a fixing internal gear ring, the fixing gear can fix the position of several side molds during processing, preventing the side molds from moving during processing. The fixing internal gear ring can automatically move several side molds away from the tire, thereby increasing the practicality of the tire mold. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the installation of the second electric cylinder and the electric motor of this utility model.

[0020] Figure 3 This is a schematic diagram of the side mold structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the mounting box of this utility model.

[0022] Figure 5 This is a schematic diagram of the meshing of the transmission gear and the fixed gear of this utility model.

[0023] Figure 6 This is a schematic diagram of the fixed internal toothed ring structure of this utility model.

[0024] Figure 7 This is a schematic diagram of the push plate structure of this utility model.

[0025] Figure reference numerals: 11 Lower mold, 12 Filling mold, 13 Upper mold, 14 Side mold, 15 Partition plate, 16 Mounting box, 17 Spring telescopic rod, 18 First electric cylinder, 19 Air pipe, 20 First return spring, 21 Connecting rod, 22 Rotating ring, 23 Transmission gear, 24 Pressing frame, 25 Second connecting rod, 26 Hinge seat, 27 Top rod, 28 Second electric cylinder, 29 Fixed gear, 30 Rotating disk, 31 Support column, 32 Motor, 33 Fixed internal gear ring, 34 Worktable, 35 Push plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In one embodiment, such as Figures 1-7 As shown, a tire mold includes a lower mold 11 and an upper mold 13. Two lower molds 11 are symmetrically arranged above a rotating disk 30. A fixed shaft is fixedly mounted at the bottom of the rotating disk 30, and the fixed shaft is rotatably mounted in a rotating hole at the upper end of a worktable 34. The lower molds 11 are fixedly mounted on the upper end of a partition plate 15, which is fixedly mounted inside a mounting box 16. The mounting box 16 is fixedly mounted on the upper end of the rotating disk 30. Several side molds 14 are closely attached to the outer sides of each lower mold 11, and the side molds 14 are combined to form a ring. A drive mechanism is provided at the bottom of the mounting box 16. A moving mechanism for opening and closing several side molds 14, wherein the upper mold 13 is positioned above the working position of a lower mold 11, the upper mold 13 is fixedly mounted on the end of a spring telescopic rod 17, and the output ends of the spring telescopic rod 17 are all fixedly connected to the upper end of the filling mold 12. The upper end of the lower mold 11 is provided with a limiting mechanism for fixing the tire. The moving mechanism facilitates the simultaneous movement of several side molds 14, making it easy for the side molds 14 to be quickly separated from the tire. The limiting mechanism makes it easy to fix the position of the tire and prevent the tire from sticking to the side molds 14 during demolding.

[0028] Both spring telescopic rods 17 are fixedly mounted on the bottom end of the first fixed plate. The two ends of the first fixed plate are respectively fixedly connected to the output ends of two first electric cylinders 18. The first electric cylinders 18 are fixedly mounted on the upper end of the fixed frame. The fixed frame is fixedly mounted on the upper end of the worktable 34. When it is necessary to process the tire, the tire blank is placed on the upper end of the lower mold 11, so that the tire blank is located below the filling mold 12. At the same time, several side molds 14 are combined to form a ring mold to position the tire blank. Then, the output end of the first electric cylinder 18 drives the spring telescopic rods 17 to move, so that the filling mold 12 first fits tightly against the upper end of the lower mold 11, and the filling mold 12 is located in the middle of the tire blank. Then, the output end of the spring telescopic rods 17 is compressed, so that the bottom end of the upper mold 13 fits tightly against the upper ends of several side molds 14 to fix the tire blank.

[0029] The filling mold 12 has several air intake channels in the middle and a connecting pipe at the upper end. The air intake channels are connected to the end of the connecting pipe. One end of the connecting pipe is sleeved with one end of the air pipe 19. One end of the air pipe 19 is fixed in the fixing hole at the upper end of the upper mold 13, and the other end of the air pipe 19 is connected to the external gas delivery component. When the tire is vulcanized, the external gas delivery component delivers high-temperature and high-pressure gas into the filling mold 12 through the air pipe 19. The inner side of the side mold 14 is provided with pattern forming grooves, so that the outer side of the tire blank forms a pattern.

[0030] One end of the fixed shaft is fixedly connected to the output end of the motor 32. The motor 32 is fixedly mounted on the bottom end of the worktable 34. The bottom end of the rotating disk 30 is provided with a circular array of several support columns 31. Each support column 31 has a ball bearing at one end. The ball bearings are in close contact with the upper end of the worktable 34. In use, when it is necessary to switch between the two mounting boxes 16, the external control component controls the motor 32 to rotate 180 degrees, so as to complete the switching between the two mounting boxes 16. At the same time, the support columns 31 can support the rotating disk 30 during the switching process. It is worth noting that the motor 32 and the external control component in this application are both existing components, and their control methods and working principles are common knowledge, which will not be described in detail here.

[0031] The moving mechanism includes a connecting rod 21. A connecting frame is fixedly provided on one side of the side mold 14. The connecting frame is L-shaped. A first hinge block is fixedly provided at one end of the connecting frame. A first guide slide rod is provided at the upper end of the partition plate 15 and at the position of the first hinge block. A connecting rod 21 is hinged to the bottom end of the first hinge block. A second hinge block is hinged to the other end of the connecting rod 21. The second hinge block is fixedly provided on the upper end of the rotating ring 22. A limiting ring groove is provided at the bottom end of the rotating ring 22. A limiting ring is rotatably provided in the limiting ring groove. The limiting ring is fixedly provided at the bottom end of the mounting box 16. A first return spring 20 is fixedly provided at the other end of the connecting frame. A fixing tube is fixedly provided at the other end of the first return spring 20. The fixing tube is fixedly provided inside the mounting box 16. An unfolding assembly is provided on the upper end of the worktable 34 to drive the rotating ring 22 to rotate, so that the side mold 14 unfolds.

[0032] The unfolding assembly includes a transmission gear 23. An external gear ring is fixedly provided on the outer side of the rotating ring 22, and the transmission gear 23 is meshed on the external gear ring. A mounting shaft is fixedly provided at the bottom end of the transmission gear 23. The mounting shaft is rotatably disposed in the mounting hole at the bottom end of the mounting box 16. A torsion spring is provided between the bottom end of the transmission gear 23 and the bottom end of the mounting box 16. A fixed internal gear ring 33 is meshed on one of the transmission gears 23. The fixed internal gear ring 33 is fixedly provided on the upper end of the worktable 34. Fixedly installed on the other side of the upper end of the workbench 34, when in use, when the rotating disk 30 drives the two mounting boxes 16 to switch, the transmission gear 23 meshes with the fixed inner gear ring 33, and the transmission gear 23 meshes with the outer gear ring to drive the rotating ring 22 to rotate. The rotating ring 22 drives several second hinge blocks to rotate. The second hinge blocks drive the side mold 14 to move through the connecting rod 21 and the first hinge block, so that the side mold 14 moves towards the inner wall of the mounting box 16, thereby separating the side mold 14 from the formed tire.

[0033] A fixed gear 29 meshes with one of the transmission gears 23. The fixed gear 29 and the fixed internal gear ring 33 are symmetrically arranged in the installation position. The fixed gear 29 is located at the fixed frame position, and a fixed column is fixedly fixed at the bottom end of the fixed gear 29. The fixed column is fixedly fixed at the upper end of the support plate. The support plate is fixed at the output end of the second electric cylinder 28. The second electric cylinder 28 is fixedly installed in the mounting hole at the upper end of the worktable 34. In use, after the formed tire is removed, the tire blank is placed on the upper end of the lower mold 11, so that the rotating disk 30 drives the mounting box 16 to rotate. When the transmission gear 23 separates from the fixed internal gear ring 33, under the action of the first return spring 20, the... Several side molds 14 move to their initial positions and combine to form a ring. Simultaneously, under the action of the torsion spring, the transmission gear 23 drives the rotating ring 22 to rotate to its initial position. After the installation box 16 completes the switching, the transmission gear 23 moves to the position of the fixed gear 29. Before the filling mold 12 enters the installation box 16, the external control component controls the second electric cylinder 28 to start. The output end of the second electric cylinder 28 retracts a certain distance, causing the output end of the second electric cylinder 28 to drive the fixed gear 29 to rise, so that the fixed gear 29 meshes with the transmission gear 23, thereby fixing the position of the rotating ring 22, so that the side molds 14 slide during production.

[0034] The limiting mechanism includes a plurality of second guide grooves arranged in a circular array on the upper end of the lower mold 11. Each of the second guide grooves has a guide rod fixedly installed. Each guide rod has a slidable clamping frame 24, which is L-shaped. One end of each clamping frame 24 is on the same plane as the upper end of the lower mold 11, and the other end of each clamping frame 24 is hinged to a second connecting rod 25. The other end of each second connecting rod 25 is hinged to a hinge seat 26. A fixing rod is fixedly installed at the bottom of the hinge seat 26, with one end extending below the rotating disk 30. A second return spring is fixedly mounted on the upper end of the hinge seat 26, and the other end of the second return spring is fixedly connected to the bottom end of the lower mold 11. Positioning grooves are provided at the bottom end of the filling mold 12 and at the corresponding positions of the clamping frame 24. A top rod 27 is fixedly mounted on the upper end of the support plate at a position coaxial with the fixed rod. A push plate 35 is provided on the upper end of the worktable 34 at one side of the fixed internal gear ring 33. The installation position of the push plate 35 is aligned with one end of the fixed rod. The push plate 35 is fixedly mounted on the output end of the third electric cylinder, and the third electric cylinder is fixedly mounted on the upper end of the worktable 34 via a mounting hole. In use, when the second electric cylinder 28 moves the support plate, the support plate moves the push rod 27, causing the push rod 27 to push the hinge seat 26 to move via the fixed rod. The hinge seat 26 moves the clamping frame 24 via the second connecting rod 25, causing the end of the clamping frame 24 to fill the positioning groove at the bottom of the filling mold 12. When the filling mold 12 needs to be removed from the middle of the tire, the output end of the second electric cylinder 28 continues to retract a certain distance, causing one end of the clamping frame 24 to extend further, thus fixing the tire and preventing the filling mold 12 from pulling the tire when it rises. When the mounting box 16 is switched, the output end of the second electric cylinder 28 extends, causing the fixed gear 29 to separate from the transmission gear 23. Then, the hinge seat 26 returns to its initial position under the action of the second return spring. When the fixed rod moves above the push plate 35, the output end of the third electric cylinder drives the push plate 35 to move. The upper end of the push plate 35 is in close contact with one end of the fixed rod, causing the push fixed rod to push the clamping frame 24 to slide. The clamping frame 24 is in close contact with the inner side of the tire, thereby fixing the tire and preventing the tire from moving when the side mold 14 is separated from the tire.

[0035] The above embodiment discloses a tire mold. When processing a tire, the tire blank is placed on the upper end of the lower mold 11, so that the tire blank is located below the filling mold 12. At the same time, several side molds 14 are combined to form a ring mold to position the tire blank. When the transmission gear 23 moves to the position of the fixed gear 29, before the filling mold 12 enters the mounting box 16, the external control component controls the second electric cylinder 28 to start. The output end of the second electric cylinder 28 retracts a certain distance, so that the output end of the second electric cylinder 28 drives the fixed gear 29 to rise, so that the fixed gear 29 and the transmission gear 23 are aligned. The engagement of the rotating ring 22 and the fixation of its position are completed. Then, the output end of the first electric cylinder 18 drives the spring telescopic rod 17 to move, so that the filling mold 12 first fits tightly against the upper end of the lower mold 11. At the same time, the filling mold 12 is located in the middle of the tire blank. Then, the output end of the spring telescopic rod 17 is compressed, so that the bottom end of the upper mold 13 fits tightly against the upper ends of several side molds 14, thereby fixing the tire blank. When the tire is vulcanized, the external gas delivery component delivers high temperature and high pressure gas into the filling mold 12 through the air pipe 19. The inner side of the side molds 14 is provided with pattern forming grooves, so that the pattern is formed on the outer side of the tire blank.

[0036] When the filling mold 12 needs to detach from the center of the tire, the output end of the second electric cylinder 28 continues to retract a certain distance, causing one end of the clamping frame 24 to extend further, thus fixing the tire and preventing the tire from being pulled away when the filling mold 12 rises. Subsequently, when the mounting box 16 is switched, the output end of the second electric cylinder 28 extends, causing the fixed gear 29 to separate from the transmission gear 23. Then, the hinge seat 26 returns to its initial position under the action of the second return spring. The transmission gear 23 meshes with the fixed internal gear ring 33, and the transmission gear 23 meshes with the external gear ring, driving the rotating ring 22 to rotate. The rotating ring 22 drives several second hinge blocks to rotate. The second hinge blocks are connected to the connecting rod 21 and the first A hinge block moves the side mold 14, causing it to move closer to the inner wall of the mounting box 16, thus separating the side mold 14 from the formed tire. Simultaneously, the output end of the third electric cylinder moves the push plate 35, with the upper end of the push plate 35 in close contact with one end of the fixing rod, causing the fixing rod to push the clamping frame 24 to slide. The clamping frame 24 is in close contact with the inner side of the tire, thus fixing the tire and preventing it from moving when the side mold 14 is separated from the tire. When the tire needs to be removed, the output end of the third electric cylinder moves the push plate 35, causing the push plate 35 to separate from one end of the fixing rod, allowing the clamping frame 24 to detach from the tire, and thus the tire can be removed.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tire mold, comprising a lower mold (11) and an upper mold (13), wherein two lower molds (11) are symmetrically arranged above a rotating disk (30), a fixed shaft is fixedly provided at the bottom end of the rotating disk (30), the fixed shaft is rotatably disposed in a rotating hole at the upper end of a worktable (34), the lower molds (11) are fixedly disposed at the upper end of a partition plate (15), the partition plate (15) is fixedly disposed inside a mounting box (16), the mounting box (16) is fixedly disposed at the upper end of the rotating disk (30), and a plurality of side molds (14) are closely attached to the outer side of each lower mold (11), the plurality of side molds (14) being combined to form a ring, characterized in that, The bottom of the mounting box (16) is provided with a moving mechanism that drives several side molds (14) to open and close. The upper mold (13) is set above the working position of a lower mold (11). The upper mold (13) is fixedly set at the end of the spring telescopic rod (17). The output end of the spring telescopic rod (17) is fixedly connected to the upper end of the filling mold (12). The upper end of the lower mold (11) is provided with a limiting mechanism for fixing the tire.

2. The tire mold according to claim 1, characterized in that, Both of the spring telescopic rods (17) are fixedly installed at the bottom of the first fixed plate. The two ends of the first fixed plate are respectively fixedly connected to the output ends of the two first electric cylinders (18). The first electric cylinders (18) are fixedly installed on the upper end of the fixed frame. The fixed frame is fixedly installed on the upper end of the worktable (34).

3. A tire mold according to claim 2, characterized in that, The filling mold (12) has several air inlet channels in the middle and a connecting pipe at the upper end of the filling mold (12). The several air inlet channels are connected to the end of the connecting pipe. One end of the connecting pipe is sleeved with one end of the air pipe (19). One end of the air pipe (19) is fixed in the fixing hole at the upper end of the upper mold (13), and the other end of the air pipe (19) is connected to an external gas delivery component.

4. A tire mold according to claim 3, characterized in that, One end of the fixed shaft is fixedly connected to the output end of the motor (32). The motor (32) is fixedly mounted on the bottom end of the worktable (34). The bottom end of the rotating disk (30) is provided with a circular array of several support columns (31). One end of each support column (31) is fitted with a ball bearing. The ball bearings are all in close contact with the upper end of the worktable (34).

5. A tire mold according to claim 4, characterized in that, The moving mechanism includes a connecting rod (21). A connecting frame is fixedly provided on one side of the side mold (14). The connecting frame is L-shaped. A first hinge block is fixedly provided at one end of the connecting frame. A first guide slide rod is provided at the upper end of the partition plate (15) and at the position of the first hinge block. A connecting rod (21) is hinged at the bottom end of the first hinge block. A second hinge block is hinged at the other end of the connecting rod (21). The second hinge block is fixedly provided at the upper end of the rotating ring (22). A limiting ring groove is provided at the bottom end of the rotating ring (22). A limiting ring is rotatably provided in the limiting ring groove. The limiting ring is fixedly provided at the bottom end of the mounting box (16). A first return spring (20) is fixedly provided at the other end of the connecting frame. A fixing tube is fixedly provided at the other end of the first return spring (20). The fixing tube is fixedly provided inside the mounting box (16). An unfolding component is provided at the upper end of the worktable (34) to drive the rotating ring (22) to rotate, so that the side mold (14) unfolds.

6. A tire mold according to claim 5, characterized in that, The unfolding assembly includes a transmission gear (23), an external gear ring is fixedly provided on the outer side of the rotating ring (22), the transmission gear (23) is meshed on the external gear ring, an installation shaft is fixedly provided at the bottom end of the transmission gear (23), the installation shaft is rotatably provided in the installation hole at the bottom end of the installation box (16), a torsion spring is provided between the bottom end of the transmission gear (23) and the bottom end of the installation box (16), a fixed internal gear ring (33) is meshed on one of the transmission gears (23), the fixed internal gear ring (33) is fixedly provided on the upper end of the worktable (34), and the fixed internal gear ring (33) is fixedly provided on the other side of the upper end of the worktable (34).

7. A tire mold according to claim 6, characterized in that, A fixed gear (29) meshes with one of the transmission gears (23). The fixed gear (29) and the fixed internal gear ring (33) are symmetrically arranged in the installation position. The fixed gear (29) is set at the fixed frame position. A fixed column is fixedly provided at the bottom end of the fixed gear (29). The fixed column is fixedly provided at the upper end of the support plate. The support plate is fixedly provided at the output end of the second electric cylinder (28). The second electric cylinder (28) is fixedly provided in the mounting hole at the upper end of the worktable (34).

8. A tire mold according to claim 7, characterized in that, The limiting mechanism includes a lower mold (11) with a circular array of several second guide grooves on its upper end. Each second guide groove has a fixed guide rod, and each guide rod has a sliding clamping frame (24) slidably mounted on it. The clamping frame (24) is L-shaped, with one end of the clamping frame (24) on the same plane as the upper end of the lower mold (11). The other end of each clamping frame (24) is hinged to a second connecting rod (25), which is hinged to a hinge seat (26). A fixing rod is fixed to the bottom of the hinge seat (26), with one end extending below the rotating disk (30). A second return spring is fixedly provided at the upper end of the hinge seat (26), and the other end of the second return spring is fixedly connected to the bottom end of the lower mold (11). The bottom end of the filling mold (12) and the position corresponding to the position of the pressing frame (24) are provided with positioning grooves. A top rod (27) is fixedly provided at the upper end of the support plate and the fixed rod coaxially. A push plate (35) is provided at the upper end of the worktable (34) and one side of the fixed internal gear ring (33). The installation position of the push plate (35) is aligned with the position of one end of the fixed rod. The push plate (35) is fixedly provided at the output end of the third electric cylinder. The third electric cylinder is fixedly provided in the mounting hole at the upper end of the worktable (34).

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