Pressing apparatus and vulcanizing machine

Abstract

A pressing apparatus, the pressing apparatus being used for providing a mold closing force to a mold. The pressing apparatus comprises a base (1), a movement groove (11), a support plate (2), a reset slot (12), a lower pull rod (3), a nitrogen supply assembly (9), an upper pull rod (4), and a cross beam (5). By means of applying pressure to the cross beam (5), the pressing apparatus provided in the present application can provide the mold closing force to the mold from an upper side of the mold. Compared with a method in the related art in which pressure is applied upwards to a lower side of the mold by means of a force-applying cylinder, the weight of the mold and related components does not need to be overcome, so that the performance requirements placed on the components providing pressure can be reduced, thereby reducing usage costs.

Description

Pressurization device and vulcanizing machine

[0001] This application claims priority to Chinese Patent Application No. 202411204680.9, filed with the Chinese Patent Office on August 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vulcanization equipment technology, such as a pressurizing device and a vulcanizing machine. Background Technology

[0003] Currently, vulcanizing of tires is generally carried out using vulcanizing machines. In order to ensure that sufficient clamping force is provided to the mold, a pressure device is usually required to apply pressure to the mold during the vulcanization stage to ensure the quality of vulcanization.

[0004] The pressurizing devices in related technologies generally include a hydraulic cylinder mounted on a base. This cylinder pushes the lower support plate upwards, applying a force to the lower mold and providing the clamping force required for tire vulcanization. However, when applying force, the hydraulic cylinder not only needs to provide the clamping force required for tire vulcanization but also needs to overcome the weight of the lower support plate, mold, and tire. This places high demands on the performance of the hydraulic cylinder and results in high operating costs. In other words, the hydraulic cylinders and hydraulic stations used in these pressurizing devices are expensive. Furthermore, there is a risk of hydraulic oil leakage, which can contaminate the equipment and the environment. Summary of the Invention

[0005] This application provides a pressurizing device and a vulcanizing machine to solve the problems of high cost of hydraulic cylinders and hydraulic stations used in related technologies, the risk of hydraulic oil leakage, and the pollution of equipment and environment caused by hydraulic oil leakage.

[0006] This application provides a pressurizing device for providing a clamping force to a mold, the pressurizing device comprising:

[0007] A base is configured to support the mold. The base includes a motion groove and a reset groove. The motion groove is vertically disposed on the base and its lower side is open. The reset groove is vertically through the base.

[0008] The pallet includes a sliding part that is slidably embedded in a moving groove, wherein the sliding part is sealed to the groove wall of the moving groove, and a moving cavity is formed between the sliding part and the groove wall of the moving groove;

[0009] A pull rod passes through the reset groove and slides in cooperation with the reset groove. The pull rod and the groove wall of the reset groove are sealed together. A reset cavity is formed between the pull rod and the groove wall of the reset groove. The support plate includes a connecting part connected to the pull rod.

[0010] The nitrogen supply assembly is configured to supply nitrogen gas into the motion chamber to push the pallet downward along the motion groove, and is also configured to supply nitrogen gas into the reset chamber to push the pull rod upward along the reset groove.

[0011] The upper pull rod is detachably connected to the upper end of the lower pull rod;

[0012] A crossbeam is mounted on the upper pull rod and is able to abut against the upper side of the mold.

[0013] In some embodiments, the motion groove is arranged in a ring shape, and the support plate is similar in shape to the motion groove;

[0014] Multiple pull rods are provided, and the multiple pull rods are evenly distributed on the support plate;

[0015] The number of the reset grooves and the number of the upper pull rods correspond to the number of the lower pull rods, and the multiple upper pull rods are respectively connected to multiple positions on the periphery of the crossbeam.

[0016] In some embodiments, the pressurizing device further includes:

[0017] A limiting element is detachably mounted on the pull-down rod, and the limiting element is configured to limit the maximum movement distance of the pull-down rod.

[0018] In some embodiments, the limiting member includes:

[0019] A limiting ring has an opening, and a mounting ring groove is provided on the pull rod, and the limiting ring is embedded in the mounting ring groove;

[0020] The fastener is configured to lock the opening of the limiting ring.

[0021] In some embodiments, the pressurizing device further includes:

[0022] An adjustment component is disposed between the upper pull rod and the crossbeam, and the adjustment component is configured to adjust the position of the crossbeam on the upper pull rod.

[0023] In some embodiments, the adjustment component includes:

[0024] A clamp is detachably mounted on the upper end of the upper pull rod;

[0025] Multiple gaskets are stackable and fitted onto the upper pull rod, and located between the clamp and the crossbeam.

[0026] In some embodiments, the pressurizing device further includes:

[0027] A quick-release assembly is disposed between the pull-down rod and the pull-up rod to control the connection or disconnection of the pull-down rod and the pull-up rod.

[0028] In some embodiments, the quick-release assembly includes:

[0029] A plum blossom head is located at the lower end of the upper pull rod;

[0030] A plum blossom groove is provided at the upper end of the pull rod, and the plum blossom head and the plum blossom groove can be engaged and connected.

[0031] In some embodiments, the pull rod is rotatably mounted on the base, and the pull rod moves upward along the reset groove to the initial position. An adjustment gap is formed between the sprite head and the sprite groove to ensure that the pull rod can be rotated.

[0032] This application also provides a vulcanizing machine, including the above-described pressurizing device and mold, wherein the pressurizing device is used to provide a clamping force to the mold. Attached Figure Description

[0033] Figure 1 is a schematic diagram of the pressurizing device provided in this application;

[0034] Figure 2 is a structural schematic diagram of the pressurization device provided in this application, which removes the quick-release assembly and the crossbeam.

[0035] Figure 3 is an enlarged view of point A in Figure 1;

[0036] Figure 4 is a schematic diagram of the nitrogen supply component in the pressurization device provided in this application;

[0037] Figure 5 is a schematic diagram of the vulcanizing machine provided in this application.

[0038] In the diagram: 1. Base; 11. Motion groove; 12. Reset groove; 13. Motion cavity; 14. Reset cavity; 2. Support plate; 21. Sealing ring; 22. Sliding part; 23. Connecting part; 24. Vent hole; 3. Pull-down rod; 4. Pull-up rod; 5. Crossbeam; 6. Limiting component; 61. Limiting ring; 62. Fixing component; 7. Adjusting assembly; 71. Clamp; 72. Gasket; 8. Quick release assembly; 81. Plum blossom head; 82. Plum blossom groove; 9. Nitrogen supply assembly; 100. Vulcanizing machine; 200. Pressurizing device; 300. Mold. Detailed Implementation

[0039] Before explaining any implementation of this application, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0040] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0041] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, one centrifugal vortex magnetic pump and / or another centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of two different centrifugal vortex magnetic pumps, or the existence of only another centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0042] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0043] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0044] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0045] In this application, the directional terms "up," "down," "left," "right," "front," and "back," etc., are used to describe the orientation and positional relationships shown in the accompanying drawings. Furthermore, in the context, it should be understood that when one element is mentioned as being "up" or "down" of another element, it can be directly connected to the other element "up" or "down," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "back side" not only represent direct orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower back, etc.

[0046] Based on the foregoing, the pressurizing devices in related technologies generally include a hydraulic cylinder mounted on a base. This cylinder pushes the lower support plate upwards, applying a certain force to the lower mold and providing the clamping force required for tire vulcanization. However, when applying force, the hydraulic cylinder not only needs to provide the clamping force required for tire vulcanization but also needs to overcome the weight of the lower support plate, the mold, and the tire. This places high demands on the performance of the hydraulic cylinder and results in high operating costs. Furthermore, while the hydraulic cylinder pushes the lower support plate to close the mold, ensuring the closed mold remains on the lower support plate, subsequent mold replacements require the hydraulic cylinder to lower the lower support plate to provide operating space. However, the upper part of the mold is always obstructed by components securing the upper mold, resulting in a relatively small operating space and inconvenient operation.

[0047] To solve the above problems, please refer to Figures 1 to 4. This embodiment provides a pressurizing device for providing clamping force to the mold. The pressurizing device includes a base 1, a support plate 2, a pull rod 3, a nitrogen supply component 9, an upper pull rod 4, and a crossbeam 5.

[0048] The base 1 includes a motion groove 11 and a reset groove 12.

[0049] The base 1 is configured to support the mold. The base 1 can be referenced from related technologies and includes multiple components that cooperate with the mold, such as tooling for fixing the mold. A motion groove 11 is disposed on the base 1 along the vertical direction Y, with its lower side open. The support plate 2 includes a sliding portion 22 that is slidably embedded in the motion groove 11. The sliding portion 22 is sealed to the groove wall of the motion groove 11, and a motion cavity 13 is formed between the sliding portion 22 and the groove wall of the motion groove 11. A reset groove 12 is formed through the base 1 along the vertical direction Y. A pull rod 3 passes through the reset groove 12 and slides in cooperation with it. The pull rod 3 is sealed to the groove wall of the reset groove 12, and a reset cavity 14 is formed between the pull rod 3 and the groove wall of the reset groove 12. The support plate 2 includes a connecting portion 23 connected to the pull rod 3. In this embodiment, the sliding part 22 is locked to the connecting part 23 by bolts, and the support plate 2 is formed by combining the sliding part 22 and the connecting part 23.

[0050] The nitrogen supply assembly 9 is configured to supply nitrogen gas into the motion chamber 13 to push the support plate 2 downward along the motion groove 11, and is also configured to supply nitrogen gas into the reset chamber 14 to push the pull rod 3 upward along the reset groove 12. The upper pull rod 4 is detachably connected to the upper end of the pull rod 3. A crossbeam 5 is disposed on the upper pull rod 4 and can abut against the upper side of the mold. It should be noted that, in this embodiment, a vent hole 24 is provided on the sliding part 22 and the connecting part 23, and the nitrogen gas supplied by the nitrogen supply assembly 9 is input into the motion chamber 13 through the vent hole 24.

[0051] The process of applying the clamping force is as follows: First, nitrogen gas is supplied to the motion cavity 13 by the nitrogen supply component 9 to push the support plate 2 to move downward along the motion groove 11. Then, the support plate 2 drives the pull rod 3 to move downward. Subsequently, the pull rod 3 applies pressure to the crossbeam 5 through the upper pull rod 4. The crossbeam 5 then transmits the pressure to the upper side of the mold on the base 1, thereby providing clamping force to the mold. This completes the application of the clamping force.

[0052] Mold changing process: First, nitrogen gas is supplied to the reset chamber 14 by the nitrogen supply component 9 to push the pull rod 3 to move upward along the reset groove 12, so that the crossbeam 5 no longer applies pressure to the upper side of the mold. Then, the upper pull rod 4 is removed from the pull rod 3, so that the crossbeam 5 can be removed from the top of the mold. Then, the mold is removed from the base 1. Then, another mold is placed on the base 1. Finally, the upper pull rod 4 is assembled onto the pull rod 3. The mold changing is thus completed.

[0053] By applying pressure to the crossbeam 5, a clamping force can be provided from the upper side of the mold to the lower side. Compared to the method in related technologies where a hydraulic cylinder applies pressure upwards to the lower side of the mold, it is not necessary to overcome the weight of the mold and related components, thereby reducing the performance requirements of the pressure-providing components and thus lowering operating costs. Furthermore, during mold changing, the upper pull rod 4 can be detached from the lower pull rod 3, ensuring that the upper side of the mold is not obstructed, thus providing a larger operating space for mold changing and facilitating operation. In addition, the driving force is provided by the nitrogen supply assembly 9. Compared to the hydraulic cylinder-based pressurization devices in related technologies, nitrogen is a clean energy source, readily available, and environmentally friendly, resulting in lower operating costs. Moreover, the traditional hydraulic cylinder and hydraulic station can be eliminated, avoiding the risk of hydraulic oil leakage, making the equipment and environment cleaner. Furthermore, there is no relative movement between the central mechanism of the pressurization device and the base, ensuring the operational accuracy of the central mechanism.

[0054] In some embodiments, please refer to FIG4, which is a schematic diagram of the nitrogen supply assembly in the pressurization device provided in this application. The schematic diagram illustrates, in the form of an example, the connection relationship between the nitrogen supply assembly 9 and the motion chamber 13, that is, how the nitrogen supply assembly 9 supplies nitrogen gas into the motion chamber 13, thereby pushing the pallet 2 to move downward along the motion groove 11.

[0055] In some embodiments, the nitrogen supply component 9 can also be connected to the reset chamber 14, and nitrogen gas is input through the vent of the reset chamber 14 to push the pull rod 3 to move upward along the reset groove 12.

[0056] In some embodiments, the internal structure and working principle of the nitrogen supply component 9 can be referenced from related technologies.

[0057] In some embodiments, the motion groove 11 is arranged in a ring shape, and the support plate 2 is similar in shape to the motion groove 11. Multiple pull rods 3 are provided, and the multiple pull rods 3 are evenly distributed on the support plate 2. The number of reset grooves 12 corresponds to the number of pull rods 3, and the multiple pull rods 4 are respectively connected to multiple positions on the periphery of the crossbeam 5. This arrangement allows the support plate 2 to simultaneously drive the multiple pull rods 3 downwards, thereby driving the multiple pull rods 4 downwards. This enables the multiple pull rods 4 to simultaneously apply pressure to multiple positions on the crossbeam 5, that is, to simultaneously apply pressure to multiple positions on the upper side of the mold, resulting in a more uniform clamping force on the mold.

[0058] To prevent the pallet 2 from detaching from the movement groove 11 during use and causing inconvenience, the pressurizing device also includes a limiting member 6, which is detachably mounted on the pull rod 3 and is configured to limit the maximum movement distance of the pull rod 3.

[0059] In this embodiment, the tray 2 and the moving groove 11 are sealed with a sealing ring 21. The sealing ring 21 is a consumable part and needs to be replaced periodically. It is understood that the limiting member 6 is detachably mounted on the pull rod 3, so that the limiting member 6 can be removed when the sealing ring 21 needs to be replaced.

[0060] Exemplarily, the limiting member 6 includes a limiting ring 61 and a fixing member 62. The limiting ring 61 has an opening, and the pull rod 3 has a mounting ring groove in which the limiting ring 61 is fitted. The fixing member 62 is configured to lock the opening of the limiting ring 61. During the installation and removal of the limiting ring 61, pulling both ends of the limiting ring 61 outward causes it to deform, thereby widening the opening, which facilitates the insertion or removal of the limiting ring 61 from the mounting ring groove. It should be noted that the fixing member 62 can be any fastening structure in the related art, such as a bolt and nut.

[0061] In some embodiments, the movement distance of the upper pull rod 4 is limited by the movement distance of the support plate 2, that is, the movement distance of the upper pull rod 4 is limited by the depth of the movement groove 11. However, in order to ensure production efficiency, the movement groove 11 is set to be shallower in order to shorten the movement path and apply pressure to the mold more efficiently, thereby causing the pressurizing device to be unable to close multiple molds with large height differences.

[0062] To enable the pressurizing device to be applicable to molds of various heights, the pressurizing device also includes an adjusting component 7, which is disposed between the upper pull rod 4 and the crossbeam 5. The adjusting component 7 is configured to adjust the position of the crossbeam 5 on the upper pull rod 4. This configuration allows adjustment of the distance between the crossbeam 5 and the mold, thereby enabling pressure to be applied to molds of different heights through the crossbeam 5.

[0063] Exemplarily, the adjusting assembly 7 includes a clamp 71 and multiple washers 72. The clamp 71 is detachably mounted on the upper end of the upper pull rod 4. The multiple washers 72 can be stacked and fitted onto the upper pull rod 4, located between the clamp 71 and the crossbeam 5. It is understood that the position of the crossbeam 5 is adjusted by the number of stacked washers 72, resulting in a simple structure and low operating cost. It should be noted that the clamp 71 can refer to the structure in related technologies. It should also be noted that the type of washers 72 can be selected according to the actual application scenario.

[0064] In some embodiments, the pressurizing device further includes a quick-release assembly 8, which is disposed between the pull-down rod 3 and the pull-up rod 4 to control the connection or disconnection of the pull-down rod 3 and the pull-up rod 4. This arrangement helps to improve the efficiency of mold changing. In this embodiment, the quick-release assembly 8 includes a spline head 81 and a spline groove 82. The spline head 81 is disposed at the lower end of the pull-up rod 4. The spline groove 82 is disposed at the upper end of the pull-down rod 3, and the spline head 81 and the spline groove 82 can be engaged and connected. It should be noted that the quick-release structure composed of the spline head 81 and the spline groove 82 can refer to relevant technologies. For example, after inserting the spline head 81 into the spline groove 82, rotating the spline head 81 or the spline groove 82 at a preset angle will make the spline head 81 engage with the spline groove 82, thus achieving the connection between the two. Conversely, rotating the spline head 81 or the spline groove 82 will disengage the spline head 81 from the spline groove 82, thus achieving the separation between the two.

[0065] In some embodiments, the pull-down rod 3 is rotatably mounted on the base 1. The pull-down rod 3 moves upward along the reset groove 12 to the initial position, and an adjustment gap is formed between the sprite head 81 and the sprite groove 82 to ensure that the pull-down rod 3 can be rotated. This arrangement makes it easier to rotate the pull-down rod 3, that is, it makes it easier to rotate the sprite groove 82, making the operation convenient. It should be noted that the setting of the adjustment gap is well known to those skilled in the art.

[0066] Referring to Figure 5, this embodiment also provides a vulcanizing machine 100, which includes the aforementioned pressurizing device 200 and mold 300. The pressurizing device 200 is used to provide a clamping force to the mold 300. It is understood that the vulcanizing machine 100 including the aforementioned pressurizing device 200 has low operating costs and is convenient for mold changing.

[0067] This application includes at least the following features:

[0068] 1. The pressurization device provided in this application provides driving force through a nitrogen supply component. Compared with the pressurization devices of related technologies that provide driving force through hydraulic cylinders, nitrogen is a clean energy source that is easy to obtain and does not pollute the environment, and has a lower cost of use.

[0069] 2. The pressurization device provided in this application provides driving force through a nitrogen supply component, which can eliminate the traditional oil cylinder and hydraulic station, avoid the risk of hydraulic oil leakage, and make the equipment and environment cleaner.

[0070] 3. The pressurizing device provided in this application can provide a clamping force from the upper side of the mold to the mold by applying pressure to the crossbeam. Compared with the method of applying pressure to the lower side of the mold by using a hydraulic cylinder in related technologies, it is not necessary to overcome the gravity of the mold and related components, thereby reducing the performance requirements of the pressure-providing components and thus reducing the cost of use.

[0071] 4. The pressurizing device provided in this application can be detached from the lower pull rod during the mold changing process, so that the upper side of the mold is not blocked, thereby providing a larger operating space for mold changing and facilitating operation.

[0072] 5. There is no relative movement between the central mechanism and the base of the pressurizing device provided in this application, which can ensure the operating accuracy of the central mechanism.

[0073] 6. The vulcanizing machine provided in this application includes the above-mentioned pressurizing device, thereby making the vulcanizing machine low in operating cost and easy to change molds.

Claims

1. A pressurizing device for providing a clamping force to a mold, the pressurizing device comprising: The base (1) is configured to support the mold. The base includes a motion groove (11) and a reset groove (12). The motion groove (11) is arranged vertically on the base (1). The lower side of the motion groove (11) is open. The reset groove (12) is opened vertically through the base (1). The pallet (2) includes a sliding part (22) that is slidably embedded in the motion groove (11), the sliding part (22) and the groove wall of the motion groove (11) are sealed together, and a motion cavity (13) is formed between the sliding part (22) and the groove wall of the motion groove (11); A pull rod (3) passes through the reset groove (12) and slides with the reset groove (12). The pull rod (3) and the groove wall of the reset groove (12) are sealed together. A reset cavity (14) is formed between the pull rod (3) and the groove wall of the reset groove (12). The support plate (2) includes a connecting part (23) connected to the pull rod (3). The nitrogen supply assembly (9) is configured to supply nitrogen gas into the motion chamber (13) to push the pallet (2) downward along the motion groove (11), and is configured to supply nitrogen gas into the reset chamber (14) to push the pull rod (3) upward along the reset groove (12); The upper pull rod (4) is detachably connected to the upper end of the lower pull rod (3); A crossbeam (5) is mounted on the upper pull rod (4) and the crossbeam (5) can abut against the upper side of the mold.

2. The pressurizing device according to claim 1, wherein, The motion groove (11) is arranged in a ring shape, and the support plate (2) is similar in shape to the motion groove (11); Multiple pull rods (3) are provided, and the multiple pull rods (3) are evenly distributed on the support plate (2); The number of the reset groove (12) and the number of the upper pull rod (4) correspond to the number of the lower pull rod (3), and the multiple upper pull rods (4) are respectively connected to multiple positions on the periphery of the crossbeam (5).

3. The pressurizing device according to claim 1 further includes: A limiting member (6) is detachably disposed on the pull rod (3), and the limiting member (6) is configured to limit the maximum movement distance of the pull rod (3).

4. The pressurizing device according to claim 3, wherein, The limiting member (6) includes: The limiting ring (61) has an opening, and the pull rod (3) has an installation ring groove, and the limiting ring (61) is embedded in the installation ring groove; The fastener (62) is configured to lock the opening of the limiting ring (61).

5. The pressurizing device according to claim 1, further comprising: An adjustment component (7) is disposed between the upper pull rod (4) and the crossbeam (5), and the adjustment component (7) is configured to adjust the position of the crossbeam (5) on the upper pull rod (4).

6. A pressurizing device according to claim 5, wherein, The adjustment component (7) includes: A clamp (71) is detachably mounted on the upper end of the upper pull rod (4); Multiple gaskets (72) are stackable and fitted onto the upper pull rod (4) and located between the clamp (71) and the crossbeam (5).

7. The pressurizing device according to claim 1, further comprising: A quick-release assembly (8) is disposed between the pull rod (3) and the upper pull rod (4) to control the connection or disconnection of the pull rod (3) and the upper pull rod (4).

8. A pressurizing device according to claim 7, wherein, The quick-release assembly (8) includes: A plum blossom head (81) is located at the lower end of the upper pull rod (4); A plum blossom groove (82) is provided at the upper end of the pull rod (3), and the plum blossom head (81) and the plum blossom groove (82) can be engaged and connected.

9. A pressurizing device according to claim 8, wherein, The pull rod (3) is rotatably mounted on the base (1). The pull rod (3) moves upward along the reset groove (12) to the initial position. An adjustment gap is formed between the plum blossom head (81) and the plum blossom groove (82) to ensure that the pull rod (3) can be rotated.

10. A vulcanizing machine comprising a pressurizing device and a mold as described in any one of claims 1-9, the pressurizing device being used to provide a clamping force to the mold.

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