Rubber ring sectional mold vulcanization device and vulcanization process thereof

Abstract

The application discloses a segmented mold pressing vulcanization device for rubber rings and a vulcanization process thereof, and relates to the technical field of rubber products, in particular to a segmented mold pressing vulcanization device for rubber rings and a vulcanization process thereof. The segmented mold pressing vulcanization device comprises a temperature control mold pressing assembly and a mold with a forming cavity, the mold is arranged in the temperature control mold pressing assembly, and the forming cavity is open at both ends and exposed outside the mold; and more than three temperature control zones are arranged on the temperature control mold pressing assembly along the direction of the forming cavity, wherein at least one temperature control zone is a first vulcanization temperature zone, and at least one temperature control zone is arranged on each of the two sides adjacent to the vulcanization temperature zone. The mold of the vulcanization device is simple, the segmented temperature control of the mold is integrated on the temperature control mold pressing assembly, the processing requirement of the mold is reduced, and the operation is convenient; and the forming cavity is highly adaptable. The segmented mold pressing vulcanization process comprises three stages of first-stage vulcanization, intermediate-stage vulcanization and joint vulcanization; and the segmented mold pressing vulcanization process can realize segmented mold pressing vulcanization of rubber products, ensure uniform cross section of the products, and make the joint strength close to the performance of non-joint parts.

Description

Technical Field

[0001] This application relates to the field of rubber product manufacturing technology, and in particular to a segmented molding and vulcanizing device for rubber rings and its vulcanization process. Background Technology

[0002] Vulcanization, also known as crosslinking or curing, is the process of transforming linear macromolecules into a three-dimensional network structure by adding vulcanizing agents and crosslinking aids such as accelerators to rubber under specific temperature and pressure conditions. Vulcanization reduces the plasticity of rubber, increases its elasticity, greatly enhances its resistance to deformation under external forces, and improves other physical and chemical properties, making rubber a valuable engineering material.

[0003] In recent years, a plethora of new rubber seals for tunnel boring machines' main drives and gearbox seals for wind turbines have emerged. These products are characterized by large diameters, diverse series, small batch sizes, and varied structures, while also facing increasingly stringent requirements for quality and reliability. To achieve development and delivery goals, segmented compression molding vulcanization has become the primary choice for rubber products. Segmented compression molding vulcanization is one of the vulcanization molding methods for rubber products. Especially for products with larger dimensions and smaller batch sizes, using segmented vulcanization can avoid the use of large equipment and molds, significantly reducing production and development costs.

[0004] The existing segmented compression molding process involves processing cooling channels in the mold and using sensors and water cooling technology to control the temperature transition of the mold. This process requires cooling channels to be set up inside the mold, resulting in a complex mold structure. It is only suitable for specific product structures. If the product needs to be produced by three or more molds, the cooling channels cannot be arranged, which directly affects the product development and delivery.

[0005] In existing segmented vulcanization technology, the transition between the vulcanized and unvulcanized sections is uneven, with almost 100% of the transition sections having steps. The transition interface is prone to deformation and may even affect the interface strength. When some products are vulcanized from straight strips and then rolled into arcs, due to product structure issues, the product is very prone to developing a wavy edge warping effect. This deformation leads to incorrect cross-sectional dimensions, and product accuracy cannot be guaranteed. Summary of the Invention

[0006] To solve at least one of the above-mentioned technical problems, this application provides a segmented molding vulcanizing device for rubber rings and its vulcanizing process, which makes the dimensions, strength and appearance quality of the molded product stable. The technical solution adopted is as follows.

[0007] To achieve the above objectives, in a first aspect, this application discloses a segmented molding and vulcanizing apparatus for rubber rings, comprising: a temperature-controlled molding assembly and a mold having a molding cavity, wherein the mold is disposed within the temperature-controlled molding assembly, and the two ends of the molding cavity are exposed outside the mold; the temperature-controlled molding assembly is provided with three or more temperature-controlled zones along the direction of the molding cavity, wherein at least one of the temperature-controlled zones is a first vulcanization temperature zone, and at least one temperature-controlled zone is provided on each of the two sides adjacent to the first vulcanization temperature zone.

[0008] In some embodiments of this application, the temperature-controlled molding assembly includes a molding body for molding the mold and three or more heating modules. The molding body has a cavity inside, and the mold can be installed in the cavity. Three or more heating modules are sequentially arranged on the molding body along the direction of the molding cavity to form three or more temperature-controlled zones.

[0009] In some embodiments of this application, the molding body includes a first molding plate and a second molding plate, the upper surface of the mold is attached to or abuts against the lower surface of the first molding plate, and the lower surface of the mold is attached to or abuts against the upper surface of the second molding plate; three or more heating modules are sequentially arranged on the first molding plate along the direction of the molding cavity; three or more heating modules are sequentially arranged on the lower surface of the second molding plate along the direction of the molding cavity.

[0010] In some embodiments of this application, the mold has guide pins that can be used for guiding and positioning components within the mold.

[0011] In some embodiments of this application, the mold is provided with one or more of the molding cavities.

[0012] In some embodiments of this application, the molding cavity is linear or arc-shaped.

[0013] In some embodiments of this application, the rubber ring is a large-diameter rubber ring product.

[0014] Secondly, this application discloses a segmented molding vulcanization process for rubber rings, in which the vulcanization device is used for vulcanization;

[0015] Perform the first stage of vulcanization: Adjust the temperature of the first vulcanization temperature zone in the middle to the vulcanization temperature, and adjust the two adjacent temperature control zones to the low temperature zone. Open the mold, and then place the rubber strip or compound rubber in the molding cavity. When it is a rubber strip, one end of the rubber strip enters the mold cavity from one end of the mold cavity, passes through the other end of the mold cavity and extends out of the mold. After the mold is closed and vulcanized for a period of time, the rubber strip sequentially forms the first transition section, the first vulcanized section, the second transition section and the unvulcanized joint. When it is a compound rubber, after the mold is closed and vulcanized for a period of time, a strip-shaped rubber product similar to the rubber strip can also be formed. The subsequent operation steps are the same as those for the rubber strip.

[0016] Perform intermediate vulcanization: Adjust the temperature of the temperature control zone near the original unvulcanized joint to the vulcanization temperature to form a second vulcanization temperature zone. After trimming the edges of the rubber strip that has undergone the first vulcanization, move the rubber strip so that the first transition section is placed in the first vulcanization temperature zone in the middle, and the first vulcanized section is placed in the second vulcanization temperature zone. This allows the first transition section to continue vulcanizing, and the first vulcanized section to supplement vulcanization in the second vulcanization temperature zone. Repeat this operation until the tail end of the rubber strip appears at one end of the molding cavity opening.

[0017] Perform joint vulcanization: Adjust the temperature of all temperature control zones to the vulcanization temperature; place the first and last ends of the rubber strip in the molding cavity in the middle of the mold, and vulcanize it to obtain a rubber ring that has been fully vulcanized.

[0018] In some embodiments of this application, a pre-forming step of the rubber product may be added before the first stage of vulcanization. The pre-forming step of the rubber product includes: setting the temperature of all temperature control zones to a lower temperature so that the mold as a whole has a lower temperature; opening the mold; placing the compound rubber into the molding cavity; closing the mold and holding pressure to soften the compound rubber but not start vulcanization; continuing this operation to form the pre-formed rubber strip.

[0019] In some embodiments of this application, during the joint vulcanization stage, compounded rubber can be added into the intermediate molding cavity to prevent insufficient rubber at the joint.

[0020] Compared with the prior art, the beneficial effects of this application are as follows:

[0021] The segmented molding and vulcanizing apparatus for rubber rings provided in this application has a simpler structure because the mold is set inside the temperature-controlled molding assembly, and the temperature-controlled molding assembly is provided with multiple temperature control zones. There is no need to lay cooling water channels outside the mold. Therefore, the molding and vulcanizing apparatus of this application is not limited to a certain mold structure and can be applied to a variety of molds, thus producing rubber products with various structures. By setting multiple temperature control zones and controlling the temperature of different temperature control zones, the rubber material is controlled to undergo the same vulcanization process in the same molding cavity, forming a whole ring product with stable dimensions and reliable joint strength. This ensures that the product cross-section is uniform and the joint strength reaches more than 90% of the performance of the non-joint parts. Attached Figure Description

[0022] Figure 1 This is a top view of the overall structure of the segmented molding and vulcanizing apparatus for rubber rings according to some embodiments of this application;

[0023] Figure 2 A schematic diagram of a multi-cavity mold in a segmented compression molding vulcanization device for rubber rings;

[0024] Figure 3 This is a schematic diagram of the first molding plate structure in some embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the second molding plate structure in some embodiments of this application;

[0026] Figure 5 This is a cross-sectional view of the overall structure of a segmented molding and vulcanizing apparatus for rubber rings according to another embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the first stage of vulcanization in a segmented molding vulcanization process for a rubber ring according to this application;

[0028] Figure 7 This is a schematic diagram of the intermediate section before vulcanization in a segmented molding vulcanization process for a rubber ring according to this application;

[0029] Figure 8 This is a schematic diagram of the joint before vulcanization in a segmented molding vulcanization process for a rubber ring according to this application;

[0030] Figure label:

[0031] 1. Temperature-controlled molding assembly; 11. Molding body; 111. First molding plate; 112. Second molding plate; 12. Heating module; 2. Mold; 21. Molding cavity; 22. First module; 221. First groove; 23. Second module; 231. Second groove; 24. Third module; 3. Temperature control zone; 31. First vulcanization temperature zone; 32. Second vulcanization temperature zone; 4. Mold locking structure; 5. Guide positioning pin; 6. Mold locking T-slot; 7. Rubber strip; 71. First transition section; 72. First vulcanization section; 73. Second transition section; 74. Unvulcanized joint. Detailed Implementation

[0032] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0033] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0036] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0037] Please refer to the following: Figures 1 to 8In a first aspect, embodiments of this application provide a segmented molding and vulcanizing apparatus for rubber rings, including a temperature-controlled molding assembly 1 and a mold 2 having a molding cavity 21. The mold 2 is disposed inside the temperature-controlled molding assembly 1, and the two ends of the molding cavity 21 are exposed outside the mold 2. The temperature-controlled molding assembly 1 is provided with three or more temperature-controlled zones 3 along the direction of the molding cavity 21 of the mold 2, wherein at least one temperature-controlled zone 3 is a first vulcanization temperature zone 31, and at least one temperature-controlled zone 3 is provided on each of the two sides adjacent to the first vulcanization temperature zone 31.

[0038] The molding cavity 21 can be straight or arc-shaped. In addition, it can be designed into other shapes according to product needs.

[0039] As a preferred embodiment, the molding and vulcanizing apparatus of this embodiment can be used to produce large-diameter rubber rings, such as rubber seals for the main drive of tunnel boring machines and gearbox seals for wind turbines. It should be noted that the diameter of the rubber ring in this embodiment can be greater than or equal to one meter. Existing technology for producing large-diameter, full-circle rubber vulcanized products requires large equipment and large molds, resulting in high development costs and long development cycles. Using this apparatus to produce large-diameter, full-circle rubber rings offers significant economic benefits.

[0040] Furthermore, during vulcanization, the molding cavity 21 is used to hold the rubber, with both ends exposed outside the mold 2, to facilitate the manufacture of rubber rings with larger diameters. Furthermore, the mold 2 is installed within the temperature-controlled molding assembly 1, and the temperature-controlled molding assembly 1 has three or more temperature-controlled zones 3. Compared to existing technologies that require cooling water channels, this embodiment has a simpler structure, reduces the processing requirements of the mold 2, and is easier to operate. The segmented temperature control of the mold 2 is integrated within the molding temperature control assembly, resulting in strong cavity adaptability. For complex product structures, three or more mold pieces 2 can be used; for simple products, multiple cavities can be designed (see attached diagram). Figure 2 This allows multiple products to be molded together without being affected by the temperature control of mold 2.

[0041] As a preferred embodiment, such as Figure 1 As shown, the temperature control molding assembly 1 is provided with three temperature control zones 3. The first vulcanization temperature zone 31 is located in the middle position, one of the temperature control zones 3 is located to the left of the first vulcanization temperature zone 31, and the other temperature control zone 3 is located to the right of the first vulcanization temperature zone 31.

[0042] Specifically, the vulcanization process in this embodiment includes three stages: initial vulcanization, intermediate vulcanization, and joint vulcanization. In the initial vulcanization stage, the temperature of the first vulcanization temperature zone 31 in the middle is adjusted to the vulcanization temperature, while the other two temperature control zones 3 are set to low temperatures. In the intermediate vulcanization stage, the temperature of the first vulcanization temperature zone 31 and the temperature control zone 3 to the right of the first vulcanization temperature zone 31 are both set to the vulcanization temperature. In the joint vulcanization stage, the temperature of all temperature control zones 3 is set to the vulcanization temperature. It should be noted that the low temperature here can be 80-120°C, and the vulcanization temperature can be 140-180°C.

[0043] It should be noted that the temperature of the first vulcanization temperature zone 31 is not limited to the vulcanization temperature. It is named this because the zone is at the vulcanization temperature for a relatively long time. That is, except for the pre-forming stage of rubber products, this zone is at the vulcanization temperature.

[0044] In a preferred embodiment, the temperature-controlled molding assembly 1 includes a molding body 11 for a molding die 2 and three or more heating modules 12. The molding body 11 forms a cavity, and the die 2 can be installed inside the cavity. The three or more heating modules 12 are sequentially arranged on the molding body 11 along the direction of the molding cavity 21 to form three or more temperature-controlled zones 3. It should be noted that the molding body 11 in this embodiment can apply pressure to the die 2 to achieve the purpose of vulcanizing rubber products. Furthermore, this embodiment has three heating modules 12, with three heating modules 12 provided on both the upper and lower surfaces of the molding body 11, and the three heating modules 12 are arranged side by side along the molding cavity 21.

[0045] like Figure 5 As shown, in a preferred embodiment, the molding body 11 includes a first molding plate 111 and a second molding plate 112. The upper surface of the mold is attached to or abuts against the lower surface of the first molding plate, and the lower surface of the mold is attached to or abuts against the upper surface of the second molding plate. Three heating modules 12 are sequentially arranged on the upper surface of the first molding plate 111 along the direction of the molding cavity 21. Three heating modules 12 are sequentially arranged on the lower surface of the second molding plate 112 along the direction of the molding cavity 21. Further, the first molding plate 111 is fixedly mounted on a frame, and a slide rail is provided on the frame. The second molding plate 112 is mounted on the slide rail. When the second molding plate 112 is pushed upward by an external force, it achieves the purpose of mold closing and applies pressure to the mold 2.

[0046] like Figure 1 As shown, in a preferred embodiment, the segmented molding vulcanization device further includes a mold locking structure 4. Furthermore, in this embodiment, the lower surface of the first molding plate 111 and the upper surface of the second molding plate 112 are both provided with mold locking T-slots 6. The mold locking structure 4 is provided on the mold 2 and is fixed in the mold locking T-slots 6 of the first molding plate 111 and the second molding plate 112 by T-nuts.

[0047] like Figure 5 As shown, in a preferred embodiment, mold 2 includes three or more modules. Further, in this embodiment, mold 2 includes three modules: a first module 22, a second module 23, and a third module 24. The first module 22 is disposed on the lower surface of the first molding plate 111, the second module 23 is disposed on the upper surface of the second molding plate 112, and the third module 24 is disposed between the first module 22 and the second module 23 to form a molding cavity 21. It should be noted that mold 2 is typically configured with two modules; however, for some products with special structures, a two-module mold will prevent product demolding or production, thus requiring three or more modules.

[0048] Furthermore, mold 2 has guide pins 5, which can be used for guiding and positioning between components within mold 2. It is understood that the first module 22 and the second module 23 can be guided and positioned during mold closing using the guide pins 5.

[0049] Furthermore, the first module 22 of the mold 2 can be fixed to the lower surface of the first molding plate 111, and the second module 23 of the mold 2 can be placed or fixed to the upper surface of the second molding plate 112.

[0050] Specifically, the lower surface of the first module 22 is provided with a first groove 221, and the third module 24 is located within the first groove 221. The two sides of the first groove 221 are inclined surfaces, forming a cone-shaped positioning. Correspondingly, the two sides of the third module 24 are also inclined surfaces. The upper surface of the second module 23 is provided with a second groove 231. Under the combined restraint of the first groove 221 and the second groove 231, the third module 24 can be stably installed between the first module 22 and the second module 23. It should be noted that the third module 24 located between the first module 22 and the second module 23 can be referred to as a middle mold or insert structure. To produce other styles of rubber products, depending on the structure of the rubber product, a varying number of middle molds or other insert structures can be added. It is understood that the mold 2 structure in this embodiment is merely an example; the mold 2 in the segmented vulcanizing device can have other structures. This example should not be construed as a limitation of this technical solution.

[0051] See attached document Figure 6-8 The process flow of a segmented molding and vulcanization process for rubber rings is as follows:

[0052] Step 1: Pre-forming of rubber products: Set the temperature of all temperature control zones 3 to a lower temperature, so that the mold 2 as a whole has a lower temperature. Open the mold 2, put the rubber compound into the molding cavity 21, close the mold and hold pressure to soften the rubber compound but not start vulcanization. Continue this operation to form a pre-formed rubber strip 7. The purpose of this step is to prevent air venting, poor mold closure, or excessive height during vulcanization; to ensure uniform rubber distribution throughout the rubber strip 7 and control dimensional accuracy. It should be noted that the rubber strip 7 obtained in this embodiment is strip-shaped, not ring-shaped. In addition, this step is only an preferred option. In the actual production process, this step can be omitted, and the rubber compound can be directly used for the first stage of vulcanization.

[0053] Step 2: Perform the first stage of vulcanization: Adjust the temperature of the first vulcanization temperature zone 31 in the middle to the vulcanization temperature, and adjust the two adjacent temperature control zones 3 to the low temperature zone. Open all molds 2, and then place the rubber strip 7 or compound rubber into the molding cavity 21. When it is rubber strip 7, one end of the rubber strip 7 enters the mold cavity 21 through the opening at one end, passes through the opening at the other end of the mold cavity 21, and extends out of the mold 2. After the mold is closed and vulcanized for a period of time, the rubber strip 7 sequentially forms the first transition section 71, the first vulcanized section 72, the second transition section 73, and the unvulcanized joint 74. The purpose of this step is to form the unvulcanized joint 74 and the second transition section 73, so as to ensure the joint size, appearance, and strength during the final joint vulcanization. When the compound rubber is placed in the molding cavity 21, after the mold is closed and vulcanized for a period of time, a strip-shaped rubber product similar to the rubber strip 7 can also be formed. The subsequent operation steps are the same as those for rubber strip 7.

[0054] Step 3: Perform intermediate section vulcanization: Adjust the temperature of the temperature control zone 3 near the original unvulcanized joint 74 to the vulcanization temperature to form the second vulcanization temperature zone 32. After trimming the edges of the rubber strip 7 that has undergone the first section vulcanization, move the rubber strip 7 so that the first transition section 71 is placed in the middle of the first vulcanization temperature zone 31, and the first vulcanized section 72 is placed in the second vulcanization temperature zone 32. This allows the first transition section 71 to continue vulcanizing, and the first vulcanized section 72 to supplement vulcanization in the second vulcanization temperature zone 32. Repeat this operation until the tail end of the rubber strip 7 appears at one end of the molding cavity 21.

[0055] The reason for supplementing the vulcanization of the first vulcanization section 72 in this step is that there is a temperature transition zone in the first vulcanization section 72, and some areas may not be completely vulcanized. Supplementing the vulcanization can make the product size and quality more stable and reliable.

[0056] In this embodiment, the last vulcanization step in the vulcanization temperature zone at the middle position is called the final mold. The final mold of the product should be measured and calculated to ensure that the diameter of the final product meets the size requirements.

[0057] Explanation of the number of repetitions: If the outer diameter of the rubber ring is D2600, then the outer circumference of the rubber ring is approximately 8170. The total arc length or total length of the forming cavity 21 of mold 2 is 1200mm, and each of the 3 sections is approximately 400mm. Therefore, the longest vulcanization section length each time is 400mm, and a total of 21 molds need to be vulcanized. Based on the circumference, each mold needs to be moved by approximately 390mm. Excluding the first mold and the joint mold, the vulcanization of the middle section needs to be repeated 19 times. The position of each transfer should be as uniform as possible.

[0058] The purpose of this step is to vulcanize the main body of the rubber strip 7, leaving only the unvulcanized joint transition area at the beginning and end, and to ensure that the main vulcanized area is fully vulcanized within a fixed time, resulting in stable dimensions and quality.

[0059] Step 4: Joint vulcanization: Adjust the temperature of all temperature control zones 3 to the vulcanization temperature; place the first and last ends of the rubber strip 7 in the cavity in the middle of the mold 2, and vulcanize it to obtain a rubber ring that has been fully vulcanized. In this step, before jointing, based on the shrinkage rate and after measurement, place the first and last ends of the rubber strip 7 in the molding cavity.

[0060] In the preforming stage of rubber products, after the preformed rubber strip 7 is generated, the excess rubber that overflows needs to be removed.

[0061] During the joint vulcanization stage, compounded rubber can be added to the middle molding cavity to prevent insufficient rubber at the joint.

[0062] In summary, the vulcanization device and process described in this embodiment produce rubber rings with stable and reliable quality. The entire rubber ring passes through the same cavity and vulcanization temperature, resulting in stable dimensions across different sections of the product. The joints are formed by a transition from the unvulcanized area to the vulcanized area, preventing obvious steps or dimensional transitions and ensuring reliable joint quality.

[0063] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A segmented molding and vulcanization process for rubber rings, characterized in that, The rubber ring is vulcanized using a segmented molding vulcanizing device. The segmented molding vulcanizing device includes a temperature-controlled molding assembly (1) and a mold (2) with a molding cavity (21). The mold (2) is located inside the temperature-controlled molding assembly (1), and the two ends of the molding cavity (21) are exposed outside the mold (2). The temperature-controlled molding assembly (1) is provided with three or more temperature-controlled zones (3) along the direction of the molding cavity (21). At least one of the temperature-controlled zones (3) is a first vulcanization temperature zone (31), and at least one temperature-controlled zone (3) is provided on each side adjacent to the first vulcanization temperature zone (31). The temperature-controlled molding assembly (1) includes a molding body (11) for molding the mold (2) and three or more heating modules (12). The molding body (11) has a cavity inside, and the mold (2) is installed in the cavity. Three or more heating modules (12) are arranged sequentially on the molding body (11) along the direction of the molding cavity (21) to form three or more temperature-controlled zones (3). The vulcanization process includes: Perform the first stage of vulcanization: Adjust the temperature of the first vulcanization temperature zone (31) set in the middle to the vulcanization temperature, and adjust the two adjacent temperature control zones (3) to the low temperature zone. Open the mold (2), and then place the rubber strip (7) or compound rubber in the molding cavity (21). When it is the rubber strip (7), one end of the rubber strip (7) enters the rubber from the opening at one end of the molding cavity (21), passes through the opening at the other end of the molding cavity (21) and extends out of the mold (2). After the mold is closed and vulcanized for a period of time, the rubber strip (7) sequentially forms the first transition section (71), the first vulcanization section (72), the second transition section (73) and the unvulcanized joint (74). When it is the compound rubber, after the mold is closed and vulcanized for a period of time, it can also form a strip rubber product. The subsequent operation steps are the same as those of the rubber strip (7). Perform intermediate vulcanization: Adjust the temperature of the temperature control zone (3) near the original unvulcanized joint (74) to the vulcanization temperature to form a second vulcanization temperature zone (32). After trimming the rubber strip (7) that has undergone the first vulcanization, move the rubber strip (7) so that the first transition section (71) is placed in the first vulcanization temperature zone (31) in the middle, and the first vulcanized section (72) is placed in the second vulcanization temperature zone (32). This allows the first transition section (71) to continue vulcanizing, and the first vulcanized section (72) to supplement vulcanization in the second vulcanization temperature zone (32). Repeat this operation until the tail end of the rubber strip (7) appears at one end of the molding cavity (21). Perform joint vulcanization: Adjust the temperature of all temperature control zones (3) to the vulcanization temperature; place the first and last ends of the rubber strip (7) in the molding cavity in the middle of the mold (2), vulcanize it, and obtain the rubber ring that has been officially vulcanized.

2. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, Before the first stage of vulcanization, a rubber product pre-forming step is added. The rubber product pre-forming step includes: setting the temperature of all temperature control zones (3) to the pre-forming temperature, opening the mold (2), putting the compound rubber into the molding cavity (21), closing the mold and holding pressure to soften the compound rubber but not start vulcanization, continuing this operation to form the pre-formed rubber strip (7).

3. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, During the joint vulcanization stage, compounded rubber is added to the middle molding cavity.

4. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, The molding body (11) includes a first molding plate (111) and a second molding plate (112). The upper surface of the mold (2) is attached to or abuts against the lower surface of the first molding plate (111), and the lower surface of the mold is attached to or abuts against the upper surface of the second molding plate (112). Three or more heating modules (12) are arranged sequentially on the first molding plate (111) along the direction of the molding cavity (21). Three or more heating modules (12) are arranged sequentially on the lower surface of the second molding plate (112) along the direction of the molding cavity (21).

5. The segmented molding and vulcanization process for rubber rings according to claim 4, characterized in that, The mold (2) has guide positioning pins (5) for guiding and positioning the components inside the mold (2).

6. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, The mold (2) is provided with one or more of the forming cavities (21).

7. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, The forming cavity (21) is either straight or arc-shaped.

8. The segmented molding and vulcanization process for rubber rings according to claim 1, characterized in that, The diameter of the rubber ring is greater than or equal to one meter.

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