Tire vulcanization equipment
By designing the gap and sealing structure between the rotating drum and the central rod in the tire vulcanizing equipment, the problems of complexity of the central mechanism and media isolation were solved, thus achieving stable operation and easy maintenance of the equipment.
Patent Information
- Application Number
- CN202423303982.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The central mechanism of existing tire vulcanizing equipment has a complex structure, which makes installation, maintenance and upkeep difficult. In addition, the isolation between the medium and the drive components is complicated, which affects the stability of operation.
A tire vulcanizing device was designed. By forming a first gap between the rotating drum and the central rod, and setting sealing structures at both ends of the rotating drum, the medium and the rotating drive components are isolated, simplifying the structure and extending the bearing life.
It simplifies the channel for the medium to enter the vulcanizing medium chamber, avoids the influence of the medium on the rotating drive components and bearings, and improves the stability of equipment operation and the convenience of maintenance.
Smart Images

Figure CN223777881U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rubber vulcanization technology, specifically relating to a tire vulcanization device. Background Technology
[0002] As the tire industry places increasingly higher demands on tire vulcanization quality, energy efficiency, and overall performance, electrically heated vulcanization methods are gradually being developed and applied in the tire vulcanization industry. The internal heating temperature of the vulcanizing medium chamber is a crucial parameter in tire vulcanization, and the configuration of various components in the central mechanism, including the electric heating element, directly affects the stability of the internal heating operation. Currently, the central mechanism structure is quite complex, and in some cases, complex sealing systems are required to isolate the vulcanizing medium from the drive components, leading to a series of problems in installation, maintenance, and upkeep. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a tire vulcanization device.
[0004] This utility model provides a tire vulcanizing device, comprising:
[0005] Sulfated capsules;
[0006] A lower clamping assembly that clamps the lower edge of the vulcanized capsule;
[0007] An upper clamping assembly that clamps the upper edge of the vulcanized capsule; and,
[0008] A center rod, the upper end of which is fixedly connected to the upper clamping assembly, and the center rod is configured to move up and down relative to the lower clamping assembly in the vertical direction;
[0009] Heating element, said heating element for heating medium; and,
[0010] A stirring component for stirring the heated medium inside the vulcanizing capsule;
[0011] A rotary drive comprising a stator assembly and a rotor, the stator assembly including an inner annular bore, at least a portion of the rotor being located within the inner annular bore of the stator assembly and facing the inner side of the stator assembly; and,
[0012] The ring seat, wherein the lower clamping assembly is fixedly mounted on the outer periphery of the ring seat, and the ring seat includes an inner ring hole;
[0013] The vulcanizing capsule, the upper clamping assembly, the lower clamping assembly, and the upper surface of the ring seat together define a vulcanizing medium chamber for containing the medium.
[0014] It also includes a rotating drum, which is rotatably disposed through the inner annular hole of the annular seat. One end of the rotating drum extends from one side of the annular seat and is connected to the agitating component. The other end of the rotating drum extends from the other side of the annular seat and the rotor is fixed to its outer periphery. The central rod extends through the interior of the rotating drum.
[0015] It also includes a support cylinder, which is disposed below the stator assembly, and the central rod passes through the support cylinder;
[0016] The support cylinder has an inner hole on the side near the stator assembly, and the other end of the rotating cylinder extends into the inner hole;
[0017] There is a first gap between the rotating drum and the central rod. The upper end of the first gap is connected to the vulcanizing medium chamber, and the lower end of the first gap is connected to the medium inlet, forming a channel for the medium to enter the vulcanizing medium chamber.
[0018] In a preferred embodiment, the support cylinder is provided with a medium inlet annular groove, which is located below the inner hole of the stator assembly. The medium inlet annular groove is connected to the medium inlet and the first gap, respectively. After entering from the medium inlet, the medium enters through the medium inlet annular groove and then enters the first gap.
[0019] In a preferred embodiment, the stator assembly includes a stator housing and a stator, and the support cylinder is disposed below the stator housing;
[0020] And / or, it also includes an annular cylinder, wherein an annular cylinder is disposed between the stator housing and the annular seat, and the annular cylinder is disposed on the outer periphery of the rotating cylinder.
[0021] In a preferred embodiment, the medium inlet is disposed on the support cylinder;
[0022] And / or, the medium inlet is located on the outer wall of the support cylinder.
[0023] In a preferred embodiment, the rotating drum is sealed to the inner bore of the supporting drum;
[0024] And / or, the rotating cylinder extends into the inner hole of the support cylinder, the inner hole sidewall is provided with a first sealing element, and the outer periphery of the rotating cylinder cooperates with the first sealing element of the inner hole sidewall to form a seal.
[0025] In a preferred embodiment, the support cylinder is further provided with a bearing mounting hole on the side near the stator housing. The bearing mounting hole is located above the first sealing element, and a first bearing is provided in the bearing mounting hole. The outer ring of the first bearing is fixed to the support cylinder, and the inner ring of the first bearing is fixed to the rotating cylinder.
[0026] And / or, the inner hole and the bearing mounting hole are the same hole.
[0027] In a preferred embodiment, a pressure ring is provided on the side of the ring seat near the vulcanizing medium chamber, the pressure ring is located on the outer periphery of the rotating cylinder, and a second sealing element is provided between the pressure ring and the rotating cylinder.
[0028] In a preferred embodiment, a second bearing is provided inside the ring seat, the second bearing is located below the pressure ring, the outer ring of the second bearing is fixed to the ring seat, and the inner ring of the second bearing is fixed to the rotating cylinder;
[0029] And / or, a pressure plate is provided between the pressure ring and the second bearing.
[0030] In a preferred embodiment, a second gap is provided between the agitating component and the central rod, and the first gap and the second gap are in communication, so that the medium enters the vulcanizing medium chamber after passing through the first gap and the second gap;
[0031] And / or, the agitator is covered by a protective cover, and there is a third gap between the protective cover and the central rod. The first gap, the second gap, and the third gap are connected in sequence, and the medium enters the vulcanizing medium chamber after passing through the first gap, the second gap, and the third gap.
[0032] In a preferred embodiment, the agitator is covered by a protective cover, which has a flow hole. The medium entering the protective cover from the second gap enters the vulcanizing medium chamber through the flow hole.
[0033] The technical solution provided by this utility model has the following advantages compared with the prior art:
[0034] 1. In this design, the rotating cylinder extends into the support cylinder, and a first gap is formed between the rotating cylinder and the central rod. The upper end of the first gap is connected to the vulcanizing medium chamber, and the lower end of the first gap is connected to the medium inlet, forming a channel for the medium to enter the vulcanizing medium chamber. The structure is simpler and it is easier to isolate the rotating drive component from the medium.
[0035] 2. This solution sets sealing structures at both ends of the rotating drum to seal with the ring seat and the support cylinder respectively, thereby isolating the rotating drive component from the medium and avoiding the influence of the medium on the rotating drive component.
[0036] 3. This design places the bearings at both ends of the rotating drum and seals them with a sealing structure, avoiding the impact of the medium filling and discharging on the bearing components, especially preventing the medium from blowing onto the bearing grease, effectively extending the bearing life and thus ensuring operational stability. Attached Figure Description
[0037] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0038] Figure 1 This is an overall schematic diagram of one embodiment of the present utility model;
[0039] Figure 2 This is a first partial enlarged view of an embodiment of the present utility model;
[0040] Figure 3 This is a second partial enlarged view of one embodiment of the present invention;
[0041] Figure 4 This is a third enlarged view of one embodiment of the present invention;
[0042] Figure 5 This is an overall schematic diagram of another embodiment of the present invention;
[0043] Figure 6 This is a partial enlarged view of another embodiment of the present invention.
[0044] Explanation of reference numerals in the attached figures:
[0045] 1-Vulcanizing capsule, 2-Upper clamping assembly, 3-Lower clamping assembly, 4-Ring seat, 5-Center rod, 6-Rotating cylinder, 7-Rotating drive component, 71-Stator assembly, 711-Stator housing, 712-Stator, 72-Rotor, 8-Support cylinder, 9-Agitating component, 10-Protective cover, 101-Flow hole, 11-Heating component, 12-Ring cylinder, 13-First bearing, 14-First sealing element, 15-First gap, 16-Media inlet, 17-Pressure ring, 18-Second sealing element, 19-Second bearing, 20-Second gap, 21-Third gap, 22-Media inlet ring groove, 23-Third sealing element. Detailed Implementation
[0046] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0049] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0051] The tire vulcanizing equipment includes a vulcanizing bladder 1, an upper clamping assembly 2, and a lower clamping assembly 3. The lower clamping assembly 3 clamps the lower edge of the vulcanizing bladder 1, and the upper clamping assembly 2 clamps the upper edge of the vulcanizing bladder 1. It also includes a central rod 5, the upper end of which is fixedly connected to the upper clamping assembly 2 and is capable of vertical movement relative to the lower clamping assembly 3. Specifically, but not limited to, the upper clamping assembly 2 includes an upper clamping ring and an upper auxiliary steel ring. The upper clamping ring has an inner hole at its center, which is fixedly connected to the central rod. The upper auxiliary steel ring is detachably fixed to the upper clamping ring near its edge. The two components cooperate to clamp the upper edge of the vulcanizing bladder 1. The lower clamping assembly 3 includes a lower clamping ring and a lower auxiliary steel ring. The lower clamping ring has an inner hole at its center, which is fixedly connected to a ring seat. The lower auxiliary steel ring is detachably fixed to the lower clamping ring near its edge. The two components cooperate to clamp the lower edge of the vulcanizing bladder 1.
[0052] The tire vulcanizing equipment also includes a ring seat 4, and a lower clamping assembly 3 is fixedly installed on the outer periphery of the ring seat 4. Specifically, but not limited to, the lower clamping ring of the lower clamping assembly 3 is fixed to the ring seat 4. The ring seat 4 includes an inner ring hole, and the central rod 5 passes through the inner ring hole of the ring seat 4, thereby realizing the lifting and lowering action relative to the ring seat 4 in the vertical direction.
[0053] The vulcanizing capsule 1, the upper clamping assembly 2, the lower clamping assembly 3, and the upper surface of the ring seat 4 together define the vulcanizing medium chamber that contains the medium.
[0054] The tire vulcanizing equipment also includes a heating element 11, which is used to heat the medium. Specifically, but not limited to, the heating element 11 can be an electromagnetic heating element, a resistance heating element, a PTC heating element, etc.; and an agitating element 9, which is used to agitate the medium inside the vulcanizing capsule 1.
[0055] The tire vulcanizing equipment also includes a rotary drive 7, which includes a stator assembly 71 and a rotor 72. The stator assembly 71 includes an inner annular hole, and at least a portion of the rotor 72 is located in the inner annular hole of the stator assembly 71 and faces the inner side of the stator assembly 71. The stator assembly 71 drives the rotor 72 to rotate.
[0056] The tire vulcanizing equipment also includes a rotating drum 6, which is rotatably set through the inner ring hole of the ring seat 4. One end of the rotating drum 6 extends from one side of the ring seat 4 and is connected to the agitating component 9. The other end of the rotating drum 6 extends from the other side of the ring seat 4 and a rotor 72 is fixed on its outer periphery. The central rod 5 extends through the interior of the rotating drum 6. The rotating drum 6 transmits the rotational motion of the rotor 72 to the agitating component 9, causing the agitating component 9 to rotate.
[0057] Please refer to Figures 1-4 In one embodiment of this utility model, the tire vulcanizing equipment further includes a support cylinder 8, which is disposed below the stator assembly 71. The central rod 5 passes through the support cylinder 8, and an inner hole 81 is provided on the side of the support cylinder 8 near the stator assembly 71. The other end of the rotating cylinder 6 extends into the inner hole 81, and a first gap 15 is formed between the rotating cylinder 6 and the central rod 5. The upper end of the first gap 15 communicates with the vulcanizing medium chamber, and the lower end of the first gap 15 communicates with the medium inlet 16, forming a channel for the medium to enter the vulcanizing medium chamber. One end of the rotating cylinder 6 extends into the vulcanizing medium chamber, and the other end of the rotating cylinder 6 extends from the ring seat 4 into the support cylinder 8, forming the first gap 15 with the central rod 5. After entering from the medium inlet 16, the medium passes directly into the vulcanizing medium chamber through the first gap 15. This arrangement greatly simplifies the structure, and the rotating cylinder 6 itself can play a good role in isolating the medium and facilitates the setting of a sealing structure to isolate the medium from the rotating drive component 7, bearings, etc.
[0058] Furthermore, the support cylinder 8 is provided with a medium inlet annular groove 22, which is located below the inner hole 81 of the stator assembly 71. The medium inlet annular groove 22 is connected to the medium inlet 16 and the first gap 15 respectively. After the medium enters from the medium inlet 16, it enters the first gap 15 through the medium inlet annular groove 22.
[0059] Furthermore, the stator assembly 71 includes a stator housing 711 and a stator 712, with a support cylinder 8 disposed below the stator housing 711; it may also include an annular cylinder 12, which is disposed between the stator housing 711 and the annular seat 4, and is located on the outer periphery of the rotating cylinder 6. The stator housing 711 can provide support, and the annular cylinder 12 can also provide support; the annular cylinder 12 can be selected as needed; alternatively, the stator housing 711 and the annular cylinder 12 can be integrally formed and considered as a single component.
[0060] Furthermore, the medium inlet 16 is provided on the support cylinder 8; preferably, the medium inlet 16 is provided on the outer wall of the support cylinder 8, which facilitates connection and makes the overall structure easier to seal when it cooperates with the first gap 15.
[0061] Furthermore, the rotating cylinder 6 and the inner hole 81 of the support cylinder 8 are sealed together; preferably, the rotating cylinder 6 extends into the inner hole 81 of the support cylinder, and a first sealing element 14 is provided on the side wall of the inner hole 81. The outer periphery of the rotating cylinder 6 and the first sealing element 14 on the side wall of the inner hole 81 cooperate to form a seal. The first sealing element 14 is not specifically limited and can be an O-ring, a lip ring, etc., and can be a double seal or a multi-seal. Through this sealing structure, the rotating cylinder 6 and the support cylinder 8 are sealed, and the medium entering from the medium inlet 16 cannot enter the chamber where the rotating drive component 7 is located through the gap between the rotating cylinder 6 and the support cylinder 8.
[0062] Furthermore, a bearing mounting hole is provided on the side of the support cylinder 8 near the stator housing 711. The bearing mounting hole is located above the first sealing element 14, and a first bearing 13 is installed in the bearing mounting hole. The outer ring of the first bearing 13 is fixed to the support cylinder 8, and the inner ring of the first bearing 13 is fixed to the rotating cylinder 6. Optionally, the bearing mounting hole and the inner hole 81 are the same hole. The first bearing 13 is located above the first sealing element 14 to prevent the medium from blowing onto the first bearing 13, thus preventing the grease from being drawn away and ensuring the stability and service life of the bearing. It should be noted that the first bearing 13 can be a bearing group arranged at intervals.
[0063] Furthermore, a pressure ring 17 is provided on the side of the ring seat 4 near the vulcanizing medium chamber. The pressure ring 17 is located on the outer periphery of the rotating cylinder 6, and a second sealing element 18 is provided between the pressure ring 17 and the rotating cylinder 6. Specifically, the side wall of the pressure ring 17 is provided with the second sealing element 18 to prevent the medium in the vulcanizing medium chamber from entering the chamber where the rotating drive component 7 is located through the gap between the pressure ring 17 and the rotating cylinder 16. It works together with the first sealing element 14 to seal the chamber where the rotating drive component 7 is located. The chamber where the rotating drive component 7 is located is composed of components including the rotating cylinder 6, the support cylinder 8, the stator housing 711, and the ring seat 4.
[0064] Furthermore, a second bearing 19 is provided inside the ring seat 4. The second bearing 19 is located below the pressure ring 17. The outer ring of the second bearing 19 is fixed to the ring seat 4, and the inner ring of the second bearing 19 is fixed to the rotating cylinder 6. Preferably, a pressure plate is provided between the pressure ring 17 and the second bearing 19. The second bearing 19 works together with the first bearing 13 to achieve better fixation and rotation of the rotating cylinder 6. The pressure plate can better fix the bearing, and the pressure plate can be made of wave springs, washers, etc.
[0065] Furthermore, there is a second gap 20 between the stirring component 9 and the central rod 5, and the first gap 15 is connected to the second gap 20. The medium enters the vulcanizing medium chamber after passing through the first gap 15 and the second gap 20.
[0066] It is acceptable. The stirring component 9 is covered by a protective cover 10. There is a third gap 21 between the protective cover 10 and the central rod 5. The first gap 15, the second gap 20, and the third gap 21 are connected in sequence. The medium enters the vulcanizing medium chamber after passing through the first gap 15, the second gap 20, and the third gap 21.
[0067] Please refer to Figures 5-6 In another embodiment, the agitator 9 is covered by a protective cover 10, which has a flow hole 101. The medium entering the protective cover 10 from the second gap 20 enters the vulcanizing medium chamber through the flow hole 101. The configuration of the flow hole 101 is not specifically limited. Any of the aforementioned embodiments that do not conflict with this embodiment can be applied to this embodiment.
[0068] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A tire vulcanizing apparatus, the tire vulcanizing apparatus comprising: Sulfated capsules (1); The lower clamping assembly (3) clamps the lower edge of the vulcanized capsule (1); Upper clamping assembly (2), said upper clamping assembly (2) clamping the upper edge of the vulcanized capsule (1); and, The center rod (5) is fixedly connected to the upper clamping assembly (2) at its upper end, and the center rod (5) is configured to move up and down relative to the lower clamping assembly (3) in the vertical direction. A heating element (11) for heating a medium; and, A stirring component (9) is used to stir the heated medium inside the vulcanizing capsule (1); A rotary drive (7) comprising a stator assembly (71) and a rotor (72), the stator assembly (71) including an inner annular bore, at least a portion of the rotor (72) being located in the inner annular bore of the stator assembly (71) and facing the inner side of the stator assembly (71); and, The ring seat (4) is fixedly installed on the outer periphery of the ring seat (4), and the ring seat (4) includes an inner ring hole; The upper surfaces of the vulcanizing capsule (1), the upper clamping assembly (2), the lower clamping assembly (3), and the ring seat (4) together define a vulcanizing medium chamber for containing the medium. It also includes a rotating drum (6), which is rotatably disposed through the inner annular hole of the ring seat (4). One end of the rotating drum (6) extends out from one side of the ring seat (4) and is connected to the stirring component (9). The other end of the rotating drum (6) extends out from the other side of the ring seat (4) and the rotor (72) is fixed on its outer periphery. The central rod (5) extends through the interior of the rotating drum (6). The feature is that it further includes a support cylinder (8), which is disposed below the stator assembly (71), and the central rod (5) passes through the support cylinder (8); The support cylinder (8) has an inner hole (81) on the side near the stator assembly (71), and the other end of the rotating cylinder (6) extends into the inner hole (81); There is a first gap (15) between the rotating drum (6) and the central rod (5). The upper end of the first gap (15) is connected to the vulcanizing medium chamber, and the lower end of the first gap (15) is connected to the medium inlet (16), forming a channel for the medium to enter the vulcanizing medium chamber.
2. The tire vulcanizing equipment according to claim 1, characterized in that, The support cylinder (8) is provided with a medium inlet annular groove (22), which is located below the inner hole (81) of the stator assembly (71). The medium inlet annular groove (22) is connected to the medium inlet (16) and the first gap (15) respectively. After the medium enters from the medium inlet (16), it enters the first gap (15) through the medium inlet annular groove (22).
3. A tire vulcanizing equipment according to claim 1 or 2, characterized in that, The stator assembly (71) includes a stator housing (711) and a stator (712), and the support cylinder (8) is disposed below the stator housing (711); And / or, it also includes an annular cylinder (12), which is disposed between the stator housing (711) and the annular seat (4), and the annular cylinder (12) is disposed on the outer periphery of the rotating cylinder (6).
4. A tire vulcanizing equipment according to claim 1 or 2, characterized in that, The medium inlet (16) is provided on the support cylinder (8); And / or, the medium inlet (16) is located on the outer wall of the support cylinder (8).
5. The tire vulcanizing equipment according to claim 1, characterized in that, The rotating cylinder (6) is sealed to the inner hole (81) of the supporting cylinder (8); And / or, the rotating cylinder (6) extends into the inner hole (81) of the support cylinder, the inner hole (81) is provided with a first sealing element (14) on its sidewall, and the outer periphery of the rotating cylinder (6) cooperates with the first sealing element (14) on the sidewall of the inner hole (81) to form a seal.
6. The tire vulcanizing equipment according to claim 5, characterized in that, The support cylinder (8) is also provided with a bearing mounting hole on the side near the stator housing (711). The bearing mounting hole is located above the first sealing element (14). A first bearing (13) is provided in the bearing mounting hole. The outer ring of the first bearing (13) is fixed to the support cylinder (8), and the inner ring of the first bearing (13) is fixed to the rotating cylinder (6). And / or, the inner hole (81) is the same hole as the bearing mounting hole.
7. The tire vulcanizing equipment according to claim 1, characterized in that, A pressure ring (17) is provided on the side of the ring seat (4) near the vulcanizing medium chamber. The pressure ring (17) is located on the outer periphery of the rotating cylinder (6). A second sealing element (18) is provided between the pressure ring (17) and the rotating cylinder (6).
8. The tire vulcanizing equipment according to claim 7, characterized in that, A second bearing (19) is provided inside the ring seat (4). The second bearing (19) is located below the pressure ring (17). The outer ring of the second bearing (19) is fixed to the ring seat (4), and the inner ring of the second bearing (19) is fixed to the rotating cylinder (6). And / or, a pressure plate is provided between the pressure ring (17) and the second bearing (19).
9. A tire vulcanizing equipment according to claim 1, characterized in that, There is a second gap (20) between the stirring component (9) and the center rod (5), and the first gap (15) communicates with the second gap (20). The medium enters the vulcanizing medium chamber after passing through the first gap (15) and the second gap (20). And / or, the stirring component (9) is covered by a protective cover (10), and there is a third gap (21) between the protective cover (10) and the central rod (5). The first gap (15), the second gap (20), and the third gap (21) are connected in sequence, and the medium enters the vulcanizing medium chamber after passing through the first gap (15), the second gap (20), and the third gap (21).
10. A tire vulcanizing equipment according to claim 9, characterized in that, The stirring component (9) is covered by a protective cover (10), and the protective cover (10) is provided with a flow hole (101). The medium that enters the protective cover (10) from the second gap (20) enters the vulcanizing medium chamber through the flow hole (101).