A vulcanized liner structure

Abstract

The present invention provides a vulcanized liner structure, comprising: a liner, a movable support frame, a top plate and a base. The liner is a retractable cylindrical structure, with a top surface at the top and a bottom surface at the bottom, and a bottom through hole is provided on the bottom surface; the movable support member is installed in the hollow inner cavity, and comprises an upper support member and a lower support member, and the upper support member and the lower support member can move relative to each other in the axial direction for a certain distance; the top plate is installed on the top of the liner, and the top plate, the top surface and the upper support member are fixedly connected; the base is fixedly installed on the mold and has a connecting portion; the base is also provided with a bottom through hole connected to the inner cavity of the connecting portion; the connecting portion is fixedly connected to the lower support member after passing through the bottom through hole. The vulcanized liner structure of the present invention is directly fixed to the lower mold through the base, and the air needle fixedly installed on the lower mold is directly inserted into the interior of the vulcanized liner. During the later mold closing, there is no problem of the air needle frequently inserting into the interior of the vulcanized liner, thereby improving the yield rate of the rubber flexible joint product.

Description

Technical Field

[0001] The invention relates to the technical field of rubber vulcanization equipment, and in particular to a vulcanization liner structure. Background Art

[0002] Vulcanization is the final and most important step in the processing of rubber products. Through a series of complex chemical reactions, it transforms rubber into a highly elastic or hard cross-linked rubber, thereby imparting the corresponding mechanical and chemical properties. Unvulcanized rubber consists of large linear molecules. When subjected to external forces, these molecules shift, resulting in noticeable deformation. However, after vulcanization, the rubber's molecular structure forms a network, restricting the movement of the macromolecules. This results in vulcanized rubber having greater tensile and elastic strength than unvulcanized rubber.

[0003] The rubber flexible joint is a relatively special rubber product (the finished product structure can be referred to Chinese appearance patent CN305496695S). Its final molding and vulcanization are completed in this last process. The previous process is to put the already manufactured cylindrical rubber blank (with large inner diameters at the upper and lower ends and a small inner diameter in the middle, which is very different from the appearance of the finished rubber flexible joint) on the vulcanization liner, place them together inside the mold, and carry out subsequent molding and vulcanization inside the mold; because the shape of the rubber blank and the shape of the rubber flexible joint are very different, the molding process requires heating the rubber blank inside the mold. After heating the rubber blank to soften, the vulcanization liner is inflated, and the vulcanization liner expands the rubber blank and squeezes it into the mold to form.

[0004] The traditional production process is to set the mold into four pieces that can cooperate with each other. When the upper and lower pieces are connected, several inner cavities can be formed. Each inner cavity is used to load a vulcanized liner with a rubber blank; the left and right pieces are used for connection, pressure, and inflating the vulcanized liner. In order to improve production efficiency, the current production process has also been designed as a semi-automated equipment. During the actual production, the lower mold automatically extends, and the worker places the vulcanized liner with the rubber blank on the lower mold one by one horizontally. After placement, the lower mold retracts, and the upper mold presses down. The upper and lower molds are closed to form an inner cavity space. The left and right molds are squeezed toward the middle and closed until they are aligned with the ends of the upper and lower molds. When the left and right molds are squeezed toward the middle, the air needles set on the left and right molds need to be accurately inserted into the holes of the vulcanized liner. After completing this step, the vulcanizer starts working and heats the mold. After heating to a certain degree, the vulcanized liner is inflated. After the vulcanized liner expands, the rubber blank is squeezed onto the inner wall of the mold, forming the appearance of the rubber flexible joint.

[0005] However, the above-mentioned prior art suffers from a technical drawback: when the upper and lower molds are closed and the left and right molds are squeezed together to close them, the air needles provided on the left and right molds often fail to accurately insert into the holes of the vulcanization bladder, resulting in damage to the air needles, production failure, and increased scrap rates. Therefore, the applicant has designed a new vulcanization equipment that eliminates the need for needle insertion into the vulcanization bladder, and has also designed a vulcanization bladder structure for use with this new vulcanization equipment. Summary of the Invention

[0006] Therefore, the object of the present invention is to provide a novel vulcanized bladder structure.

[0007] To this end, the present invention provides a vulcanized bladder structure, comprising:

[0008] The liner is cylindrical, made of elastic and retractable material, and has a hollow inner cavity; the top has a top surface, the bottom has a bottom surface, and the bottom surface is provided with a bottom through hole communicating with the hollow inner cavity;

[0009] A movable support member is installed inside the hollow inner cavity, comprising an upper support member and a lower support member, wherein the upper support member and the lower support member can move relative to each other along the axial direction by a certain distance;

[0010] A top plate is mounted on the top of the inner container, wherein the top plate, the top surface and the upper support member are fixedly connected;

[0011] The base is suitable for being fixedly installed on the mold and has a connecting portion, which is hollow cylindrical; a second through hole is also provided on the base, which is connected to the inner cavity of the connecting portion; the connecting portion is fixedly connected to the lower support member after passing through the bottom through hole, and the bottom surface is fixed between the base and the lower support member.

[0012] As a preferred embodiment, when the upper support member and the lower support member are extended to their longest length, they are 0.8-1.2 times the axial length of the hollow inner cavity; when the upper support member and the lower support member are shortened to their shortest length, they are at least 3 mm shorter than the axial length of the hollow inner cavity.

[0013] As a preferred solution, a first through hole is provided on the top plate, a top through hole is provided on the top surface, and an upper threaded hole is provided on the upper support member. The first through hole, the top through hole and the upper threaded hole are arranged relatively to each other in the upper and lower directions; after a bolt is passed through the first through hole and the top through hole, it is screwed and fixed to the upper threaded hole.

[0014] As a preferred solution, the upper support member includes an upper end portion and a lower tube, one end of the lower tube is fixedly connected to the upper end portion, and the other end extends in a direction away from the upper end portion;

[0015] The lower support member includes a lower end portion and an upper tube; one end of the upper tube is fixedly connected to the lower end portion, and the other end extends in a direction away from the lower end portion;

[0016] The lower cylinder and the upper cylinder are relatively movably arranged in a sleeve manner;

[0017] The lower tube is provided with a long through hole, and the upper tube is provided with a limiting post; or the lower tube is provided with a limiting post, and the upper tube is provided with a long through hole;

[0018] The limiting column is arranged through the long through hole.

[0019] As a preferred solution, the side of the top plate is integrally formed with a top plate side wall, the top plate and the top plate side wall form a top cover, and the top of the liner is installed into the inside of the top cover.

[0020] As a preferred solution, the connecting portion has an external thread, the lower support member is provided with a lower threaded hole, and the connecting portion is fixedly connected to the lower threaded hole.

[0021] As a preferred solution, the base has a bottom plate, the connecting portion is provided on the bottom plate, and when the connecting portion is fixedly connected to the lower support member, the bottom surface is squeezed and fixed between the lower support member and the bottom plate.

[0022] As a preferred solution, a second through hole is formed on the bottom plate, and the second through hole is directly opposite to the cavity of the connecting portion.

[0023] As a preferred solution, the sides of the bottom plate are integrally formed with bottom plate side walls, the bottom plate and the bottom plate side walls form a bottom cover, and the bottom of the liner is installed into the bottom cover.

[0024] As a preferred solution, a connecting sleeve is fixedly provided at one end of the base plate away from the connecting portion, and the connecting sleeve has an external thread suitable for being screwed and fixed with an internal thread provided on the mold.

[0025] The technical solution provided by the present invention has the following advantages:

[0026] The vulcanized liner structure of the present invention comprises: an liner, a movable support member, a top plate, and a base. The liner is cylindrical, made of an elastic and retractable material, and has a hollow inner cavity. The top portion comprises a top surface, the bottom portion comprises a bottom surface, and the bottom surface comprises a bottom through-hole communicating with the hollow inner cavity. The movable support member is mounted within the hollow inner cavity and comprises an upper support member and a lower support member, which are capable of relative axial movement a certain distance. The top plate is mounted on the top of the liner, and the top plate, the top surface, and the upper support member are fixedly connected. The base is adapted to be fixedly mounted on a mold and comprises a hollow cylindrical connecting portion. The base is further provided with a second through-hole communicating with the inner cavity of the connecting portion for passage of an air needle fixedly mounted on the mold. The connecting portion passes through the bottom through-hole and is fixedly connected to the lower support member, thereby securing the bottom surface between the base and the lower support member.

[0027] The vulcanization liner structure of the present invention is directly fixed on the lower mold through a base. During production, workers directly put the rubber blank to be vulcanized on the vulcanization liner. After starting the vulcanizer, the lower mold is moved to the bottom of the upper mold. The upper and lower molds are first pressed down to close the mold. The left and right molds are first moved downward to a position opposite to the upper and lower molds after closing the mold, and then squeezed toward the middle, so that the rubber blank is sealed in the complete mold cavity formed by the upper and lower molds and the left and right molds after closing the mold. Then, the rubber blank can be subjected to the next step of molding and vulcanization.

[0028] Unlike the traditional method of first sleeve a rubber blank on the vulcanized liner and then placing the vulcanized liner with the rubber blank horizontally on the lower mold, the vulcanized liner of the present invention is directly fixed vertically on the lower mold, and the air needle fixed on the lower mold is directly inserted into the inside of the vulcanized liner. During the later mold closing, there is no problem of inserting the air needle into the vulcanized liner, thereby avoiding the traditional vulcanized liner structure. When the left and right molds are closed, the air needle is set on the left and right molds, and the air needle often cannot be accurately inserted into the hole on the vulcanized liner, thereby improving the molding rate and productivity of the vulcanized rubber flexible joint; in addition, a maximum stretching distance is provided between the upper support member and the lower support member, which can avoid excessive stretching of the liner by the upper mold during the demolding process after vulcanization is completed, and can protect the liner and extend the service life of the liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the prior art or the specific embodiments of the present invention, the following briefly introduces the drawings used in the description of the prior art or the specific embodiments.

[0030] Figure 1 It is a schematic diagram of the overall structure of the vulcanized liner of the present invention.

[0031] Figure 2 yes Figure 1 Another angle view.

[0032] Figure 3 yes Figure 1 sectional view of .

[0033] Figure 4 yes Figure 1 Cross-sectional view after rotation 90°.

[0034] Figure 5 yes Figure 4 Schematic diagram of the matching structure of the upper support member and the lower support member.

[0035] Figure markings: 1. Inner liner; 10. Hollow inner cavity; 11. Top surface; 12. Bottom surface; 13. Bottom through hole; 14. Top through hole; 2. Upper support member; 20. Upper threaded hole; 21. Upper end portion; 22. Lower tube; 23. Long through hole; 3. Lower support member; 30. Lower threaded hole; 31. Lower end portion; 32. Upper tube; 33. Limiting column; 4. Top plate; 41. First through hole; 42. Side wall of top plate; 5. Base; 50. Bottom plate; 51. Connecting part; 52. Second through hole; 54. Side wall of bottom plate; 55. Connecting sleeve. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand this solution, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first," "second," and the like in the claims and description of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more than two. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other unless there is a conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Example

[0040] This embodiment provides a vulcanized liner structure, such as Figure 1-5 As shown, it includes: an inner liner 1, a movable support, a top plate 4 and a base 5.

[0041] Among them, the inner liner 1 is cylindrical, made of elastic and retractable material, and has a hollow inner cavity 10; the top has a top surface 11, the bottom has a bottom surface 12, and the bottom surface 12 is provided with a bottom through hole 13 connected to the hollow inner cavity 10; the movable support member is installed inside the hollow inner cavity 10, including an upper support member 2 and a lower support member 3, and the upper support member 2 and the lower support member 3 can move relative to each other in the axial direction for a certain distance; the top plate 4 is installed on the top of the inner liner 1, and the top plate 4, the top surface 11 and the upper support member 2 are fixedly connected; the base 5 is suitable for fixed installation on the mold, and has a connecting part 51, and the connecting part 51 is hollow cylindrical; a second through hole 52 is also provided on the base 5, and the second through hole 52 is connected to the inner cavity of the connecting part 51; the connecting part 51 passes through the bottom through hole 13 and is fixedly connected to the lower support member 3, and fixes the bottom surface 12 between the base 5 and the lower support member 3.

[0042] like Figure 3-4 As shown, the vulcanization liner structure of this embodiment is directly fixed on the lower mold through the base 5. During production, the worker directly puts the rubber blank to be vulcanized on the vulcanization liner, and then starts the vulcanizer. The lower mold moves to the bottom of the upper mold, and the upper and lower molds are first pressed down to close the mold. The left and right molds first move downward to a position opposite to the upper and lower molds after closing the mold, and then squeeze toward the middle, so as to seal the rubber blank in the complete mold cavity formed by the upper and lower molds and the left and right molds after closing the mold. Then the rubber blank can be subjected to the next step of molding and vulcanization.

[0043] Unlike the traditional method of first sleeve the rubber blank on the vulcanization liner and then place the vulcanization liner with the rubber blank horizontally on the lower mold, the vulcanization liner of this embodiment is directly fixed vertically on the lower mold, and the air needle fixed on the lower mold is directly inserted into the vulcanization liner. When the mold is closed in the later stage, there is no problem of inserting the air needle into the vulcanization liner, thereby avoiding the traditional vulcanization liner structure. When the left and right molds are closed, the air needle is set on the left and right molds, and the problem of the air needle not being able to be accurately inserted into the hole on the vulcanization liner often occurs, thereby improving the molding rate and productivity of the vulcanized rubber flexible joint.

[0044] refer to Figure 3-5 As shown, the vulcanized liner structure of this embodiment, when the upper support member 2 and the lower support member 3 are extended to the longest length, is 0.9 times the axial length of the hollow inner cavity 10; when the upper support member 2 and the lower support member 3 are shortened to the shortest length, they are 3mm shorter than the axial length of the hollow inner cavity 10. The advantage of such a setting is that a support member with a hard supporting function is provided inside the vulcanized liner. When workers put the rubber blank on the vulcanized liner, the vulcanized liner is not easy to bend, and the putting is more convenient; when the upper support member 2 and the lower support member 3 are shortened to the shortest length, they are 3mm shorter than the axial length of the hollow inner cavity 10. When the upper mold is pressed down and contacts the top of the vulcanized liner, it may continue to press down for a certain distance. Since the upper and lower support members are at the shortest length at this time, they will not offset the upper mold and will not hinder the normal downward pressure of the upper mold; and the upper and lower molds can The vulcanization liner is properly limited so that the top of the vulcanization liner can basically remain aligned with the mold cavity of the upper mold without deviation; when vulcanization is completed and demoulding is required, the top of the vulcanization liner may adhere to the upper mold, and when the upper mold moves upward, the vulcanization liner will be stretched. After the upper support member 2 and the lower support member 3 are set, when the vulcanization liner is stretched to the maximum length of the upper and lower support members, the upper and lower support members will help the vulcanization liner to resist the pulling force of the upper mold, thereby pulling the top of the vulcanization liner away from the upper mold, successfully realizing demoulding, and protecting the liner from damage due to excessive stretching.

[0045] As a modified design, the lengths of the upper and lower support members 2 and 3 when extended to their maximum lengths can be 0.8-1.2 times the axial length of the hollow inner cavity 10; and when shortened to their minimum lengths, the lengths of the upper and lower support members 2 and 3 can be at least 3 mm shorter than the axial length of the hollow inner cavity 10. The specific values can be determined by those skilled in the art based on actual conditions.

[0046] A first through-hole 41 is formed in the top plate 4, a top through-hole 14 is formed in the top surface 11, and an upper threaded hole 20 is formed in the upper support member 2. The first through-hole 41, the top through-hole 14, and the upper threaded hole 20 are arranged vertically opposite each other; a bolt is passed through the first through-hole 41 and the top through-hole 14, and then screwed into the upper threaded hole 20 to secure the connection. This is one method proposed by the applicant for securing the top plate 4, the top surface 11, and the upper support member 2. Those skilled in the art may also use other existing securing methods that can achieve the same purpose.

[0047] The vulcanized liner structure of this embodiment is as follows: the upper support member 2 includes an upper end portion 21 and a lower tube 22, one end of the lower tube 22 is fixedly connected to the upper end portion 21, and the other end extends in a direction away from the upper end portion 21; the lower support member 3 includes a lower end portion 31 and an upper tube 32; one end of the upper tube 32 is fixedly connected to the lower end portion 31, and the other end extends in a direction away from the lower end portion 31; the lower tube 22 and the upper tube 32 are relatively movably arranged in a sleeve; a long through hole 23 is provided on the lower tube 22, and a limiting column 33 is provided on the upper tube 32; or a limiting column 33 is provided on the lower tube 22, and a long through hole 23 is provided on the upper tube 32; the limiting column 33 is provided through the long through hole 23. This structural design can realize the relative movement of the upper support member 2 and the lower support member 3 within a certain distance range.

[0048] In the vulcanized liner structure of this embodiment, the diameters of the upper end portion 21 and the lower end portion 31 are substantially the same as the inner diameter of the hollow cavity 10 , providing auxiliary support for the liner 1 .

[0049] In this embodiment of the vulcanized liner structure, top panel 4 has integrally formed side panels 42. Top panel 4 and top panel side panels 42 form a top cover, into which the top portion of liner 1 is mounted. This arrangement protects the top exterior of liner 1, extending its service life and further improving the connection between top panel 4 and top surface 11.

[0050] In the vulcanized liner structure of this embodiment, the connecting portion 51 has an external thread, a lower threaded hole 30 is provided in the middle of the lower support member 3, and the connecting portion 51 and the lower threaded hole 30 are fixedly connected by threads.

[0051] In the vulcanization liner structure of this embodiment, the base 5 has a bottom plate 50, and the connecting portion 51 is arranged on the bottom plate 50. When the connecting portion 51 is fixedly connected to the lower support member 3, the bottom surface 12 is squeezed and fixed between the lower support member 3 and the bottom plate 50, and the liner 1 is indirectly fixed to the lower mold through the base 5, preventing the liner 1 from moving or falling off from the mold due to force, which affects the vulcanization work.

[0052] In the vulcanized liner structure of this embodiment, a second through hole 52 is opened on the bottom plate 50 , and the second through hole 52 is opposite to the cavity of the connecting part 51 , so that the air needle can directly pass through the second through hole 52 and be inserted into the cavity of the connecting part 51 .

[0053] In this embodiment of the vulcanized liner structure, the bottom plate 50 is integrally formed with a bottom plate sidewall 54. The bottom plate 50 and the bottom plate sidewall 54 form a bottom cover, into which the bottom of the liner 1 is installed. This arrangement cooperates with the connecting portion 51 and the lower support member 3 to further limit and secure the bottom of the liner 1.

[0054] In this embodiment of the vulcanization liner structure, a connecting sleeve 55 is fixedly mounted on the end of the base plate 50, away from the connecting portion 51. This connecting sleeve 55 has external threads adapted to be threadedly secured to the internal threads of the mold. The base plate 50 is mounted on the lower mold via the connecting sleeve 55, and the liner 1 is further secured to the lower mold via the connecting portion 51 and the lower support member 3. During vulcanization, the rubber blank is simply placed around the outer periphery of the liner 1 to begin the vulcanization process.

[0055] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this innovative technical solution.

Claims

1. A vulcanized liner structure, characterized in that: include: The inner container (1) is cylindrical, made of elastic and retractable material, and has a hollow inner cavity (10); the top has a top surface (11), the bottom has a bottom surface (12), and the bottom surface (12) is provided with a bottom through hole (13) communicating with the hollow inner cavity (10); A movable support member is installed inside the hollow inner cavity (10), comprising an upper support member (2) and a lower support member (3), wherein the upper support member (2) and the lower support member (3) are capable of relative movement along the axial direction by a certain distance; A top plate (4) is mounted on the top of the inner container (1), wherein the top plate (4), the top surface (11) and the upper support member (2) are fixedly connected; The base (5) is suitable for being fixedly mounted on the mold and has a connecting portion (51) which is hollow and cylindrical. The base (5) is also provided with a second through hole (52) which is in communication with the inner cavity of the connecting portion (51). The connecting portion (51) passes through the bottom through hole (13) and is fixedly connected to the lower support member (3), and the bottom surface (12) is fixed between the base (5) and the lower support member (3).

2. The vulcanized bladder structure according to claim 1, characterized in that: When the upper support member (2) and the lower support member (3) are extended to their longest length, they are 0.8-1.2 times the axial length of the hollow inner cavity (10); when the upper support member (2) and the lower support member (3) are shortened to their shortest length, they are at least 3 mm shorter than the axial length of the hollow inner cavity (10).

3. The vulcanized bladder structure according to claim 1, wherein: A first through hole (41) is provided on the top plate (4), a top through hole (14) is provided on the top surface (11), and an upper threaded hole (20) is provided on the upper support member (2). The first through hole (41), the top through hole (14) and the upper threaded hole (20) are arranged relative to each other in the upper and lower directions; a bolt is passed through the first through hole (41) and the top through hole (14), and then is screwed and fixedly connected to the upper threaded hole (20).

4. The vulcanized bladder structure according to any one of claims 1 to 3, characterized in that: The upper support member (2) comprises an upper end portion (21) and a lower tube (22), one end of the lower tube (22) is fixedly connected to the upper end portion (21), and the other end extends in a direction away from the upper end portion (21); The lower support member (3) includes a lower end portion (31) and an upper tube (32); one end of the upper tube (32) is fixedly connected to the lower end portion (31), and the other end extends in a direction away from the lower end portion (31); The lower cylinder (22) and the upper cylinder (32) are relatively movably arranged in a sleeve manner; The lower tube (22) is provided with a long through hole (23), and the upper tube (32) is provided with a limiting column (33); or, the lower tube (22) is provided with a limiting column (33), and the upper tube (32) is provided with a long through hole (23); The limiting column (33) is arranged through the long through hole (23).

5. The vulcanized bladder structure according to claim 3, characterized in that: The side of the top plate (4) is integrally formed with a top plate side wall (42), the top plate (4) and the top plate side wall (42) form a top cover, and the top of the inner container (1) is installed into the inside of the top cover.

6. The vulcanized bladder structure according to claim 1, characterized in that: The connecting portion (51) has an external thread, a lower threaded hole (30) is provided on the lower support member (3), and the connecting portion (51) is fixedly connected to the lower threaded hole (30).

7. The vulcanized bladder structure according to claim 1, characterized in that: The base (5) has a bottom plate (50), the connecting portion (51) is arranged on the bottom plate (50), and when the connecting portion (51) is fixedly connected to the lower support member (3), the bottom surface (12) is squeezed and fixed between the lower support member (3) and the bottom plate (50).

8. The vulcanized bladder structure according to claim 7, characterized in that: A second through hole (52) is provided on the bottom plate (50), and the second through hole (52) is directly opposite to the cavity of the connecting portion (51).

9. The vulcanized bladder structure according to claim 7, characterized in that: The side of the bottom plate (50) is integrally formed with a bottom plate side wall (54), the bottom plate (50) and the bottom plate side wall (54) form a bottom cover, and the bottom of the liner (1) is installed into the inside of the bottom cover.

10. The vulcanized bladder structure according to claim 7 or 8, characterized in that: A connecting sleeve (55) is fixedly provided at one end of the bottom plate (50) away from the connecting portion (51), and the connecting sleeve (55) has an external thread suitable for being screwed and fixed with an internal thread provided on the mold.

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