Pressurizing device and vulcanizer

Abstract

A pressurizing device and a vulcanizer. The pressurizing device (200) is configured to provide a mold clamping force for a mold (300), and the pressurizing device (200) comprises a base (1), a plurality of lower pull rods (2), a plurality of upper pull rods (3), a cross beam (4) and a nitrogen supply assembly (9). The pressurizing device (200) applies pressure to the upper side of the mold (300) by means of a moving member (42), so as to provide a mold clamping force for the mold (300). Compared with the method in the related art of using a booster cylinder to apply pressure upwards to the lower side of a mold, there is no requirement to overcome the gravity of the mold and related components, thereby reducing the performance requirement for a component providing pressure, and thus reducing usage costs.

Description

Pressurization device and vulcanizing machine

[0001] This application claims priority to Chinese Patent Application No. 202411204682.8, 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 configured to provide a clamping force to a mold, the pressurizing device comprising:

[0007] A base is configured to support the mold;

[0008] Multiple pull rods are distributed around the perimeter of the base;

[0009] Multiple upper pull rods are detachably connected to multiple lower pull rods in a one-to-one correspondence;

[0010] A crossbeam is mounted on one of the upper tie rods, and the crossbeam is located above the base;

[0011] The crossbeam includes a moving groove and a moving component. The moving groove is provided on the crossbeam along the vertical direction. The opening of the moving groove faces downward. The moving component slides and engages with the moving groove. The moving component and the groove wall of the moving groove are sealed together. A moving cavity is formed between the moving component and the groove wall of the moving groove.

[0012] A nitrogen supply assembly is configured to supply nitrogen gas into the motion chamber to propel the moving component downward along the motion groove.

[0013] In some embodiments, the pressurizing device further includes:

[0014] A hot plate is disposed between the moving part and the mold, through which the moving part transmits pressure to the upper side of the mold, and the hot plate is configured to isolate the heat generated by the mold.

[0015] In some embodiments, the pressurizing device further includes:

[0016] A limiting component is configured to limit the maximum movement distance of the moving part.

[0017] In some embodiments, the limiting component includes:

[0018] An movable hole is vertically provided through the crossbeam;

[0019] The limiting bolt can pass through the movable hole and is clearance-fitted with the movable hole. The head of the limiting bolt can abut against the upper side of the crossbeam. The maximum distance between the head of the limiting bolt and the upper side of the crossbeam is less than the maximum movement distance of the moving part. The tail of the limiting bolt is screwed to the hot plate.

[0020] In some embodiments, the limiting component further includes:

[0021] A connecting hole is provided vertically through the crossbeam;

[0022] An assembly hole is provided vertically through the hot plate; the assembly hole is a stepped hole.

[0023] The connecting bolt can pass through the connecting hole and the assembly hole in sequence. The connecting bolt, the connecting hole, and the assembly hole are all clearance fit. The connecting bolt includes an abutting surface. The tail of the connecting bolt is screwed to the upper side of the mold, so that the abutting surface abuts against the stepped surface of the assembly hole.

[0024] In some embodiments, the pressurizing device further includes:

[0025] 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.

[0026] In some embodiments, the quick-release assembly includes:

[0027] A plum blossom head is located at the lower end of the upper pull rod;

[0028] 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.

[0029] The pull rod is rotatably mounted on the base, and an adjustment gap is reserved between the plum blossom head and the plum blossom groove to ensure that the pull rod can be rotated.

[0030] In some embodiments, the pressurizing device further includes:

[0031] An adjustment assembly is disposed between the plurality of upper pull rods and the crossbeam, the adjustment assembly being configured to adjust the position of the crossbeam on the plurality of upper pull rods.

[0032] In some embodiments, the adjustment component includes:

[0033] Multiple adjusting nuts are threadedly engaged with multiple upper pull rods in a one-to-one correspondence, and the multiple adjusting nuts are respectively connected to multiple positions of the crossbeam;

[0034] A drive chain is sleeved on and meshes with multiple adjusting nuts;

[0035] A servo motor is mounted on the crossbeam and is configured to drive the transmission chain to move back and forth.

[0036] This application also provides a vulcanizing machine, including the above-described pressurizing device and mold, wherein the pressurizing device is configured to provide a clamping force to the mold. Attached Figure Description

[0037] Figure 1 is a rotated sectional view of the pressurizing device provided in this application;

[0038] Figure 2 is an enlarged view of point A in Figure 1;

[0039] Figure 3 is an enlarged view of point B in Figure 1;

[0040] Figure 4 is a schematic diagram of the nitrogen supply assembly provided in this application;

[0041] Figure 5 is a structural schematic diagram of the quick-release assembly provided in this application;

[0042] Figure 6 is a partial structural schematic diagram of the adjustment component provided in this application;

[0043] Figure 7 is a schematic diagram of the vulcanizing machine provided in this application.

[0044] In the diagram: 1. Base; 2. Lower pull rod; 3. Upper pull rod; 4. Crossbeam; 41. Motion groove; 42. Moving part; 43. Motion cavity; 44. Sealing ring; 5. Hot plate; 6. Limiting assembly; 61. Movable hole; 62. Limiting bolt; 63. Connecting hole; 64. Assembly hole; 65. Connecting bolt; 651. Abutment surface; 7. Quick release assembly; 71. Torx head; 72. Torx groove; 8. Adjusting assembly; 81. Adjusting nut; 82. Drive chain; 83. Servo motor; 9. Nitrogen supply assembly; 100. Vulcanizing machine; 200. Pressurizing device; 300. Mold. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Please refer to Figures 1 to 6. This embodiment provides a pressurizing device configured to provide a clamping force to a mold. The pressurizing device includes a base 1, multiple pull rods 2, multiple pull rods 3, a crossbeam 4, and a nitrogen supply assembly 9.

[0053] The base 1 is configured to support the mold. The base 1 can refer to the structure in related art, and the base 1 includes multiple parts that cooperate with the mold, such as tooling for fixing the mold.

[0054] For example, multiple pull rods 2 are distributed around the periphery of the base 1. Multiple pull rods 3 are detachably connected to the multiple pull rods 2 in a one-to-one correspondence. A crossbeam 4 is disposed on the multiple pull rods 3 and is located above the base 1. The crossbeam 4 includes a motion groove 41 and a moving member 42. The motion groove 41 is disposed on the crossbeam 4 along the vertical direction Y, with the groove opening facing downward. The moving member 42 slides into the motion groove 41, and there is a sealed connection between the moving member 42 and the groove wall of the motion groove 41. A motion cavity 43 is formed between the moving member 42 and the groove wall of the motion groove 41. The nitrogen supply assembly 9 is configured to supply nitrogen gas into the motion cavity 43 to push the moving member 42 downward along the motion groove 41.

[0055] The process of applying the clamping force is as follows: First, nitrogen gas is supplied to the moving cavity 43 by the nitrogen supply component 9 to push the moving part 42 to move downward along the moving groove 41. Then, the moving part 42 applies 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.

[0056] Mold changing process: First, remove the upper pull rod 3 from the lower pull rod 2, then remove the crossbeam 4 from above the mold, then remove the mold from the base 1, then place another mold on the base 1, and finally assemble the upper pull rod 3 onto the lower pull rod 2. This completes the mold changing process.

[0057] Pressure is applied to the upper side of the mold via the moving part 42 to provide a clamping force. Compared to the method in related technologies where a hydraulic cylinder applies pressure upwards to the lower side of the mold, this eliminates the need to overcome the weight of the mold and related components, thus reducing the performance requirements of the pressure-providing component and consequently lowering operating costs. Furthermore, during mold changing, the upper pull rod 3 can be detached from the lower pull rod 2, ensuring the upper side of the mold is not obstructed and providing more operating space for mold changes, facilitating operation. Additionally, 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 1, ensuring the operational accuracy of the central mechanism.

[0058] The structure and working principle of the nitrogen supply component 9 can be referenced from relevant technologies. It should also be noted that the mold can also refer to the structure in relevant technologies; the mold generally includes an upper mold and a lower mold. In this embodiment, the moving part 42 is configured to apply pressure to the upper side of the upper mold.

[0059] In some embodiments, the pressurizing device further includes a hot plate 5 disposed between the moving member 42 and the mold. The moving member 42 transmits pressure to the upper side of the mold through the hot plate 5, and the hot plate 5 is configured to isolate the heat generated by the mold. This arrangement can reduce the impact of the heat generated by the mold on the pressurizing device. It should be noted that the structure and working principle of the hot plate 5 can be found in related technologies. The hot plate 5 typically includes a first plate and a second plate stacked together.

[0060] To prevent the moving part 42 from detaching from the moving groove 41 during use and causing inconvenience, the pressurizing device also includes a limiting component 6, which is configured to limit the maximum movement distance of the moving part 42.

[0061] In this embodiment, both the crossbeam 4 and the hot plate 5 are circular. Four motion grooves 41 are provided, evenly distributed around the axis of the crossbeam 4. Four moving parts 42 are provided corresponding to the number of motion grooves 41. Four limiting components 6 are provided, evenly distributed around the axis of the crossbeam 4. The multiple motion grooves 41 and multiple limiting components 6 are spaced apart. This arrangement allows for more uniform force distribution on the upper side of the mold by applying pressure to multiple positions on the hot plate 5 through the four moving parts 42.

[0062] For example, the cutting line in Figure 1 is a broken line, with one half used to cut the motion groove 41 and the motion member 42, and the other half used to cut the limiting component 6, so that the cooperation relationship between the limiting component 6 and the motion member 42 can be more clearly shown.

[0063] In this embodiment, the moving part 42 and the moving groove 41 are sealed with a sealing ring 44. The sealing ring 44 is a consumable part and needs to be replaced periodically. To improve the ease of replacing the sealing ring 44, in this embodiment, the limiting component 6 includes a movable hole 61 and a limiting bolt 62. The movable hole 61 is vertically Y-shaped and extends through the crossbeam 4. The limiting bolt 62 passes through the movable hole 61 and is clearance-fitted with it. The head of the limiting bolt 62 abuts against the upper side of the crossbeam 4. The maximum distance between the head of the limiting bolt 62 and the upper side of the crossbeam 4 is less than the maximum movement distance of the moving part 42. The tail of the limiting bolt 62 is screwed to the hot plate 5. As shown in Figure 3, the distance between the head of the limiting bolt 62 and the upper side of the crossbeam 4 is 'a'.

[0064] When the sealing ring 44 needs to be replaced, first remove the tail of the limiting bolt 62 from the hot plate 5, then remove the limiting bolt 62 from the movable hole 61. This allows the moving part 42 to be removed from the moving groove 41, thus enabling the replacement of the sealing ring 44, which seals the gap between the moving part 42 and the moving groove 41. It is understandable that the limiting bolt 62 has a simple structure and is easy to operate. It should be noted that the model of the limiting bolt 62 can be selected according to the actual application scenario.

[0065] To ensure a tighter fit between the hot plate 5 and the upper side of the mold, resulting in more even pressure applied to the upper side of the mold, the limiting assembly 6 also includes a connecting hole 63, an assembly hole 64, and a connecting bolt 65. The connecting hole 63 is vertically Y-shaped and extends through the crossbeam 4. The assembly hole 64 is vertically Y-shaped and extends through the hot plate 5; the assembly hole 64 is a stepped hole. The connecting bolt 65 passes through the connecting hole 63 and the assembly hole 64 sequentially. The connecting bolt 65, the connecting hole 63, and the assembly hole 64 are all clearance fits. The connecting bolt 65 includes an abutment surface 651, and its tail is screwed to the upper side of the mold, causing the abutment surface 651 to abut against the stepped surface of the assembly hole 64. With this configuration, after the abutment surface 651 of the connecting bolt 65 abuts against the stepped surface of the assembly hole 64, gradually tightening the connecting bolt 65 presses the hot plate 5 firmly against the upper side of the mold.

[0066] The hot plate 5 is secured to the upper side of the mold by connecting bolts 65, ensuring a tighter fit between the hot plate 5 and the upper side of the mold. Alternatively, by passing the connecting bolts 65 sequentially through the connecting holes 63 and 64 before connecting to the upper side of the mold, assembly and disassembly are facilitated. It should be noted that the type of connecting bolt 65 can be selected based on the specific application scenario.

[0067] In some embodiments, the pressurizing device includes a quick-release assembly 7, which is disposed between the pull-down rod 2 and the pull-up rod 3 to control the connection or disconnection of the pull-down rod 2 and the pull-up rod 3. This arrangement helps to improve the efficiency of mold changing. In this embodiment, the quick-release assembly 7 includes a spline head 71 and a spline groove 72. The spline head 71 is disposed at the lower end of the pull-up rod 3. The spline groove 72 is disposed at the upper end of the pull-down rod 2, and the spline head 71 and the spline groove 72 can be engaged and connected. It should be noted that the quick-release structure composed of the spline head 71 and the spline groove 72 can refer to relevant technologies. For example, after inserting the spline head 71 into the spline groove 72, rotating the spline head 71 or the spline groove 72 at a preset angle will make the spline head 71 engage with the spline groove 72, thus achieving the connection between the two. Conversely, rotating the spline head 71 or the spline groove 72 will disengage the spline head 71 from the spline groove 72, thus achieving the separation between the two.

[0068] In some embodiments, the pull-down rod 2 is rotatably mounted on the base 1, and an adjustment gap is reserved between the sprite head 71 and the sprite groove 72 to ensure that the pull-down rod 2 can be rotated. This arrangement makes it easier to rotate the pull-down rod 2, that is, it makes it easier to rotate the sprite groove 72, making operation convenient. It should be noted that the setting of the adjustment gap is well known to those skilled in the art.

[0069] The movement distance of the moving part 42 is limited by the depth of the moving groove 41. However, in order to ensure production efficiency, the moving groove 41 is set to be shallower to shorten the movement path and apply pressure to the mold more efficiently. This results in the pressurizing device being unable to close multiple molds with large height differences.

[0070] To enable the pressurizing device to be applicable to molds of various heights, the pressurizing device also includes an adjusting component 8, which is disposed between multiple upper pull rods 3 and a crossbeam 4. The adjusting component 8 is configured to adjust the position of the crossbeam 4 on the multiple upper pull rods 3. This configuration allows for the adaptation to molds of different heights, adjusting the height of the crossbeam 4 so that the moving part 42 can apply pressure to molds of different heights.

[0071] Exemplarily, the adjusting assembly 8 includes multiple adjusting nuts 81, a transmission chain 82, and a servo motor 83. The multiple adjusting nuts 81 are threadedly engaged with multiple upper pull rods 3 in a one-to-one correspondence, and are respectively connected to multiple positions on the crossbeam 4. The transmission chain 82 is sleeved on the multiple adjusting nuts 81 and meshes with them. The servo motor 83 is mounted on the crossbeam 4 and is configured to drive the transmission chain to move back and forth. It can be understood that by driving the transmission chain 82 with the servo motor 83, and the transmission chain 82 meshing with the multiple adjusting nuts 81, the multiple adjusting nuts 81 can be driven to rotate simultaneously, thereby achieving synchronous driving of the crossbeam 4 to rise and fall at multiple positions, resulting in higher efficiency. It should be noted that the connection method between the servo motor 83 and the transmission chain 82 can refer to relevant technologies.

[0072] Referring to Figure 7, this embodiment also provides a vulcanizing machine 100, which includes the aforementioned pressurizing device 200 and mold 300. The pressurizing device 200 is configured 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 facilitates mold changes.

[0073] This application includes at least the following features:

[0074] 1. The pressurization device provided in this application provides driving force through the nitrogen supply component 9. 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.

[0075] 2. The pressurization device provided in this application provides driving force through the nitrogen supply component 9, which can eliminate the traditional oil cylinder and hydraulic station, avoid the risk of hydraulic oil leakage, and make the equipment and environment cleaner.

[0076] 3. The pressurizing device provided in this application applies pressure to the upper side of the mold through moving parts to provide mold closing force to the mold. Compared with the method of applying pressure to the lower side of the mold by using a force-applying cylinder in related technologies, it does not need 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.

[0077] 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.

[0078] 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.

[0079] 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 configured to provide a clamping force to a mold, the pressurizing device comprising: The base (1) is configured to support the mold; Multiple pull rods (2) are distributed around the base (1); Multiple upper pull rods (3) are detachably connected to multiple lower pull rods (2) in a one-to-one correspondence; A crossbeam (4) is mounted on a plurality of upper pull rods (3), and the crossbeam (4) is located above the base (1); The crossbeam (4) includes a moving groove (41) and a moving component (42). The moving groove (41) is provided on the crossbeam (4) along the vertical direction. The opening of the moving groove (41) faces downward. The moving component (42) slides and engages with the moving groove (41). The moving component (42) and the groove wall of the moving groove (41) are sealed together. A moving cavity (43) is formed between the moving component (42) and the groove wall of the moving groove (41). The nitrogen supply assembly (9) is configured to supply nitrogen gas into the motion chamber (43) to push the motion member (42) downward along the motion groove (41).

2. The pressurizing device according to claim 1 further includes: A hot plate (5) is disposed between the moving part (42) and the mold. The moving part (42) transmits pressure to the upper side of the mold through the hot plate (5). The hot plate (5) is configured to isolate the heat generated by the mold.

3. The pressurizing device according to claim 2 further includes: The limiting component (6) is configured to limit the maximum movement distance of the moving part (42).

4. The pressurizing device according to claim 3, wherein, The limiting component (6) includes: An active hole (61) is vertically disposed on the crossbeam (4); The limiting bolt (62) can pass through the movable hole (61) and is clearance-fitted with the movable hole (61). The head of the limiting bolt (62) can abut against the upper side of the crossbeam (4). The maximum distance between the head of the limiting bolt (62) and the upper side of the crossbeam (4) is less than the maximum movement distance of the moving part (42). The tail of the limiting bolt (62) is screwed to the hot plate (5).

5. A pressurizing device according to claim 4, wherein, The limiting component (6) also includes: A connecting hole (63) is provided vertically through the crossbeam (4); An assembly hole (64) is provided vertically through the hot plate (5), and the assembly hole (64) is a stepped hole; A connecting bolt (65) can pass through the connecting hole (63) and the assembly hole (64) in sequence. The connecting bolt (65) is clearance-fitted with the connecting hole (63) and the assembly hole (64). The connecting bolt (65) includes an abutment surface (651). The tail of the connecting bolt (65) is screwed to the upper side of the mold, so that the abutment surface (651) abuts against the stepped surface of the assembly hole (64).

6. The pressurizing device according to claim 1, further comprising: A quick-release assembly (7) is disposed between the pull rod (2) and the upper pull rod (3) to control the connection or disconnection of the pull rod (2) and the upper pull rod (3).

7. A pressurizing device according to claim 6, wherein, The quick-release assembly (7) includes: A plum blossom head (71) is provided at the lower end of the upper pull rod (3); A plum blossom groove (72) is provided at the upper end of the pull rod (2), and the plum blossom head (71) and the plum blossom groove (72) can be engaged and connected. The pull rod (2) is rotatably mounted on the base (1), and an adjustment gap is reserved between the plum blossom head (71) and the plum blossom groove (72) to ensure that the pull rod (2) can be rotated.

8. The pressurizing device according to claim 1, further comprising: An adjustment component (8) is disposed between the plurality of upper pull rods (3) and the crossbeam (4), the adjustment component (8) being configured to adjust the position of the crossbeam (4) on the plurality of upper pull rods (3).

9. A pressurizing device according to claim 8, wherein, The adjustment component (8) includes: Multiple adjusting nuts (81) are threadedly engaged with multiple upper pull rods (3) in a one-to-one correspondence, and the multiple adjusting nuts (81) are respectively connected to multiple positions of the crossbeam (4); The transmission chain (82) is sleeved on the plurality of adjusting nuts (81) and meshes with the plurality of adjusting nuts (81); A servo motor (83) is mounted on the crossbeam (4) and is configured to drive the transmission chain (82) to move back and forth.

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

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