Vulcanizing machine for rubber inner tube

Abstract

The invention relates to the technical field of vulcanizing machines, and provides a vulcanizing machine for a rubber inner tube. The lower die is arranged on the rack in a relative lifting manner and is provided with a first material bearing part; the ejector block is arranged on the lower die in a lifting mode and provided with a second material bearing part, after the ejector block is lifted, the second material bearing part is connected with or higher than the first material bearing part, the second material bearing part and the first material bearing part are connected and then combined to form a lower die material bearing cavity, and the lower die material bearing cavity abuts against the inner tube. By means of the technical scheme, the problem that in the prior art, an inner tube adheres to the lower mold after being vulcanized, and consequently the inner tube is not easy to take out is solved.

Description

Technical Field

[0001] This invention relates to the field of vulcanizing machine technology, specifically to a vulcanizing machine for rubber inner tubes. Background Technology

[0002] In the manufacturing of rubber inner tubes, the vulcanization process is crucial. During vulcanization, the rubber reacts chemically with the surface of the lower mold under high temperature and pressure, causing the inner tube to adhere to the mold after vulcanization. This adhesion makes removing the inner tube extremely difficult, requiring operators to use external tools or apply external force to attempt to separate it from the mold. This process not only consumes a significant amount of valuable time, greatly slowing down the production pace, but also, due to the rough handling, easily causes irreparable damage to the inner tube, such as scratches, tears, or even deformation. As a result, the pass rate of inner tubes decreases significantly, raw material waste is severe, and production costs rise sharply. In large-scale mass production of inner tubes, the frequent occurrence of inner tube adhesion significantly extends the production cycle of each inner tube. The originally quick cycle of vulcanization, tire removal, and re-vulcanization is forced to stop due to the difficulty in tire removal, leaving equipment in a waiting state for extended periods and drastically reducing overall output. Meanwhile, damage to inner tubes during the tire removal process and uneven vulcanization and localized defects caused by unreasonable mold structures during vulcanization result in inconsistent product quality and a high defect rate. This not only increases the cost of product inspection and screening but also seriously affects the company's market reputation and economic benefits. Summary of the Invention

[0003] This invention proposes a vulcanizing machine for rubber inner tubes, which solves the problem in related technologies where the inner tube sticks to the lower mold after vulcanization, making it difficult to remove.

[0004] The technical solution of the present invention is as follows: A vulcanizing machine for rubber inner tubes, comprising: frame; The lower mold is relatively lifted and mounted on the frame, and the lower mold has a first material-bearing part; The top block is raised and lowered on the lower mold. The top block has a second material-bearing part. After the top block is raised and lowered, the second material-bearing part is connected to or higher than the first material-bearing part. The second material-bearing part and the first material-bearing part are connected to form the lower mold material-bearing cavity. The lower mold material-bearing cavity abuts against the inner tube.

[0005] Optionally, the top block has an overlapping portion, and the lower mold has an overlapping surface. After the lower mold rises, the top block overlaps with the overlapping surface through the overlapping portion, so that the top block and the lower mold rise synchronously. The method further includes: A heating frame is ellipsably mounted on the machine frame. The heating frame has a cavity. The lower mold is ellipsably mounted inside the cavity. The bottom of the cavity has several protrusions. After the lower mold descends, the top block abuts against the protrusions, causing the overlapping part to disengage from the overlapping surface, so that the second material-bearing part is higher than the first material-bearing part.

[0006] Optionally, the lower mold further includes several retaining grooves, and also includes: A number of stop bars are provided on the heating frame. After the lower mold rises, the stop groove abuts against the stop bar, causing the heating frame to rise synchronously. A telescopic component is provided on the frame. After the telescopic component extends, its extended end passes through the heating frame and abuts against the lower mold, pushing the lower mold to rise.

[0007] Optionally, the lower mold, the top block, and the heating frame together form a first vulcanizing section, and the number of first vulcanizing sections is plurality of them, which are vertically spaced apart, and further includes: The upper mold has a material-bearing cavity at one end. The upper mold is located at the lower end of the frame and / or the heating frame. After the first vulcanizing part rises, several first vulcanizing parts approach each other in sequence, so that the upper mold and the lower mold abut against each other. The material-bearing cavity of the upper mold and the material-bearing cavity of the lower mold form a vulcanizing space.

[0008] Optionally, the heating frame has an air intake channel that communicates with the cavity, and the first material receiving part has a plurality of vent holes that are respectively connected at both ends to the lower mold material receiving cavity and the cavity.

[0009] Optionally, the lower mold has a groove that communicates with the vent hole, and further includes: A lower pressure rod is movably mounted on the lower mold, with one end extending out of the lower mold and the other end having an abutment portion; A blocking rod is slidably disposed in the groove, the blocking rod has an abutting surface, and the abutting part slidably abuts against the abutting surface; After the lower mold rises, one end of the lower pressure rod abuts against the upper mold, causing the lower pressure rod to descend and drive the sealing rod to slide, so that one end of the sealing rod blocks the vent.

[0010] Optionally, it also includes: A first elastic element, with its two ends acting on the sealing rod and the lower mold respectively, is used to provide a force to the sealing rod away from the vent.

[0011] Optionally, it also includes: A top column is provided at one end on the lower mold. After the lower mold rises, the top column abuts against the first vulcanized part above, causing several of the first vulcanized parts to rise synchronously.

[0012] Optionally, the stop bar is rotatably and slidably mounted on the heating frame, one end of the stop bar is located inside the cavity and has a flat surface and an inclined surface, and the other end is located outside the heating frame. After the stop bar rotates, the lower mold rises and abuts against the flat surface or the inclined surface, further comprising: The second elastic element has two ends that act on the stop rod and the heating frame respectively, and is used to provide a force for one end of the stop rod to extend into the cavity.

[0013] Optionally, the stop bar has limiting grooves on both sides of the end away from the cavity, and the heating frame has a limiting rod on the outside. After the stop bar rotates, the limiting rod abuts against the side wall of any of the limiting grooves to limit the rotation range of the stop bar.

[0014] The working principle and beneficial effects of the present invention are: In this invention, to solve the problem in related technologies where the inner tube sticks to the lower mold after vulcanization, making it difficult to remove, a vulcanizing machine for rubber inner tubes is designed. First, a frame is constructed, serving as a stable support structure. The lower mold can be raised and lowered relative to the frame. The lower mold is circular and has a first material-bearing part. A top block is located on the first material-bearing part and can be raised and lowered. The top block has a second material-bearing part. During vulcanization, the second material-bearing part of the top block and the first material-bearing part of the lower mold connect to form the lower mold material-bearing cavity. The inner tube is placed in the lower mold material-bearing cavity for vulcanization, ensuring the inner tube's position remains stable during vulcanization. After vulcanization, the top block rises. At this time, the first material-bearing part of the lower mold and the second material-bearing part of the top block interlock, meaning the second material-bearing part of the top block lifts the vulcanized inner tube from inside the lower mold material-bearing cavity, breaking the adhesion between the inner tube and the lower mold material-bearing cavity caused by vulcanization, allowing the inner tube to be easily separated from the lower mold material-bearing cavity.

[0015] The advantage lies in the fact that this design cleverly solves the problem of the inner tube sticking to the lower mold after vulcanization, making it difficult to remove, through the lifting of the top block and the unique material-bearing structure. While ensuring the quality of inner tube vulcanization, it greatly improves production efficiency, reduces potential damage to the inner tube due to difficulty in removal, and lowers production costs. Moreover, the structure is relatively simple, easy to implement, and easy to maintain. Attached Figure Description

[0016] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0017] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the internal structure of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the present invention from another angle; Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the heating frame structure of the present invention; Figure 6 This is a schematic diagram of the mold structure of the present invention; Figure 7 This is a schematic cross-sectional view of the internal structure of the mold of the present invention; Figure 8 For the present invention Figure 7 Enlarged view at point C; Figure 9 For the present invention Figure 1 Enlarged view at point D; Figure 10 For the present invention Figure 2 Enlarged view of point A in the middle.

[0018] In the diagram: 1. Frame, 2. Lower mold, 201. First material receiving part, 3. Top block, 301. Second material receiving part, 302. Overlap part, 202. Overlap surface, 4. Heating frame, 401. Cavity, 402. Protrusion, 203. Baffle groove, 5. Baffle rod, 6. Telescopic component, 7. Upper mold, 403. Suction channel, 204. Vent hole, 205. Slide groove, 8. Lower pressure rod, 801. Abutment part, 9. Sealing rod, 901. Abutment surface, 10. First elastic component, 11. Top column, 501. Plane, 502. Inclined surface, 12. Second elastic component, 503. Limiting groove, 404. Limiting rod. Detailed Implementation To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] Reference Figures 1-10 The first embodiment of the present invention provides a vulcanizing machine for rubber inner tubes, including a frame 1; a lower mold 2 is relatively lifted and disposed on the frame 1, the lower mold 2 having a first material receiving part 201; a top block 3 is lifted and disposed on the lower mold 2, the top block 3 having a second material receiving part 301, after the top block 3 is lifted and disposed, the second material receiving part 301 is connected to or higher than the first material receiving part 201, and the second material receiving part 301 and the first material receiving part 201 are connected to form a lower mold material receiving cavity, the lower mold material receiving cavity abutting against the inner tube.

[0023] In this embodiment, to address the problem in related technologies where the inner tube adheres to the lower mold 2 after vulcanization, making it difficult to remove, a vulcanizing machine for rubber inner tubes is designed. First, a frame 1 is constructed, serving as a stable support structure. The lower mold 2 is raised and lowered relative to the frame 1. The lower mold 2 is circular and has a first material-bearing portion 201. A top block 3 is located on the first material-bearing portion 201 and can be raised and lowered. The top block 3 has a second material-bearing portion 301. During vulcanization, the second material-bearing portion 301 of the top block 3 connects with the first material-bearing portion 201 of the lower mold 2 to form a lower mold material-bearing cavity. The inner tube is placed within this cavity for vulcanization, ensuring its stable position during the vulcanization process. After vulcanization is complete, the top block 3 rises. At this time, the first material-bearing part 201 of the lower mold 2 and the second material-bearing part 301 of the top block 3 are intersected. That is, the second material-bearing part 301 of the top block 3 lifts the vulcanized inner tube from the inside of the lower mold material-bearing cavity, breaking the adhesion between the inner tube and the lower mold material-bearing cavity caused by vulcanization, so that the inner tube can be smoothly separated from the lower mold material-bearing cavity.

[0024] The advantage lies in the fact that this design cleverly solves the problem of the inner tube sticking to the lower mold 2 after vulcanization, making it difficult to remove, through the lifting and lowering of the top block 3 and the unique material-bearing structure. While ensuring the quality of inner tube vulcanization, it greatly improves production efficiency, reduces potential damage to the inner tube due to difficulty in removal, and lowers production costs. Moreover, the structure is relatively simple, easy to implement, and easy to maintain.

[0025] Furthermore, the top block 3 has an overlapping portion 302, and the lower mold 2 has an overlapping surface 202. After the lower mold 2 rises, the top block 3 overlaps with the overlapping surface 202 through the overlapping portion 302, so that the top block 3 and the lower mold 2 rise synchronously. It also includes a heating frame 4, which is elliptical and mounted on the frame 1. The heating frame 4 has a cavity 401 inside, and the lower mold 2 is elliptical and mounted inside the cavity 401. The bottom of the cavity 401 has several protrusions 402. After the lower mold 2 descends, the top block 3 abuts against the protrusions 402, so that the overlapping portion 302 and the overlapping surface 202 are disengaged, and the second material receiving portion 301 is higher than the first material receiving portion 201.

[0026] In this embodiment, the top block 3 has an outwardly protruding block-shaped overlapping portion 302 on its side, and the lower mold 2 has an overlapping surface 202 at the corresponding position. Before the vulcanization process begins, when the lower mold 2 rises, the top block 3 overlaps with the overlapping surface 202 of the lower mold 2 through the overlapping portion 302, thereby causing the top block 3 and the lower mold 2 to rise synchronously.

[0027] The heating frame 4 is capable of lifting and lowering on the frame 1. Inside the heating frame 4 is a cavity 401, within which the lower mold 2 is installed. Multiple protrusions 402 are evenly distributed at the bottom of the cavity 401. When vulcanization is complete and the inner tube needs to be separated, the lower mold 2 descends, and the top block 3 abuts against the protrusions 402, causing the overlapping portion 302 of the top block 3 to disengage from the overlapping surface 202 of the lower mold 2. At this point, the first material-bearing portion 201 is higher than the second material-bearing portion 301, facilitating subsequent material removal. This design aims to achieve different movement relationships between the top block 3 and the lower mold 2 at different stages of the vulcanization process, thereby better addressing the adhesion problem between the inner tube and the lower mold 2.

[0028] The advantage lies in the fact that the overlapping and unoverlapping design allows the top block 3 and the lower mold 2 to change their movement as needed at different stages of the vulcanization process. Synchronous rising during the early stages of vulcanization ensures stable placement of the inner tube and stable vulcanization. After vulcanization, unoverlapping facilitates handling any potential adhesion between the inner tube and the lower mold 2. Simultaneously, the cavity 401 and protrusion 402 design of the heating frame 4 provide a reliable structural foundation for the entire operation, further improving the flexibility and reliability of the vulcanizing machine and contributing to improved vulcanization quality and production efficiency.

[0029] Furthermore, the lower mold 2 also has several retaining grooves 203 and a retaining rod 5. The retaining rod 5 is arranged on the heating frame 4. After the lower mold 2 rises, the retaining grooves 203 abut against the retaining rod 5, causing the heating frame 4 to rise synchronously. The telescopic component 6 is arranged on the frame 1. After the telescopic component 6 extends, the extended end passes through the heating frame 4 and abuts against the lower mold 2, pushing the lower mold 2 to rise.

[0030] In this embodiment, the lower mold 2 has multiple baffles 203 evenly arranged on its edge. The baffles 5 are mounted on the heating frame 4 through specific mounting positions, and the number of baffles 5 is the same as the number of baffles 203. The telescopic component 6 is a hydraulic telescopic rod, which is installed at the center of the bottom of the frame 1. The protruding end of the telescopic component 6 can pass through the pre-drilled hole at the bottom of the heating frame 4 and contact the lower surface of the lower mold 2.

[0031] When the vulcanization process begins, the telescopic component 6 extends, pushing the lower mold 2 upward. The retaining groove 203 of the lower mold 2 abuts against the retaining rod 5, causing the heating frame 4 to rise synchronously. This design creates an effective linkage between the lower mold 2, the retaining rod 5, and the heating frame 4, ensuring that all components work together during the vulcanization process.

[0032] The advantage lies in the fact that the cooperation between the stop bar 5 and the stop groove 203 allows the lower mold 2 to effectively drive the heating frame 4 during its ascent, achieving coordinated movement among multiple components. This design reduces the need for additional drive devices and lowers costs. Simultaneously, the design of the telescopic component 6 facilitates precise control of the lower mold 2's ascent, helping to ensure the stability and accuracy of the vulcanization process, further improving vulcanization quality and production efficiency.

[0033] Furthermore, the lower mold 2, the top block 3, and the heating frame 4 together form the first vulcanizing section. There are several first vulcanizing sections, which are arranged vertically at intervals. It also includes an upper mold 7, one end of which has an upper mold receiving cavity. The upper mold 7 is located at the lower end of the frame 1 and / or the heating frame 4. After the first vulcanizing section rises, several first vulcanizing sections approach each other in sequence, so that the upper mold 7 abuts against the lower mold 2, and the upper mold receiving cavity and the lower mold receiving cavity form a vulcanizing space.

[0034] In this embodiment, a first vulcanizing section consists of two lower molds 2, a top block 3, and a heating frame 4. These first vulcanizing sections are arranged vertically at intervals. The upper mold 7 is a flat plate structure with an upper mold material receiving cavity on its lower surface. The upper mold 7 is mounted on the bottom of the frame 1 by bolts and screws.

[0035] When the vulcanization operation begins, the telescopic component 6 pushes the lower mold 2 upward, and the lower mold 2 drives the heating frame 4 upward. The two first vulcanization sections approach each other in sequence, and the upper mold 7 accurately abuts against the lower mold 2. The material receiving cavity of the upper mold and the material receiving cavity of the lower mold together form a vulcanization space for the vulcanization of rubber inner tubes. This design, in which multiple sets of first vulcanization sections cooperate with the upper mold 7, can process multiple rubber inner tubes simultaneously.

[0036] The advantage lies in the fact that the vertically spaced arrangement of multiple first vulcanizing sections and their coordinated design with the upper mold 7 allow for the simultaneous vulcanization of multiple rubber inner tubes. This design significantly improves production efficiency and, through a rational structural design, ensures the accurate formation of the vulcanization space, thus enhancing vulcanization quality. Simultaneously, the connection and driving methods between the various components ensure the stability and reliability of the entire vulcanization process, reducing vulcanization problems caused by unreasonable structures.

[0037] Furthermore, the heating frame 4 has an air intake channel 403, which is connected to the cavity 401. The first material receiving part 201 has several air vents 204, and the two ends of the air vents 204 are respectively connected to the lower mold material receiving cavity and the cavity 401.

[0038] In this embodiment, several hollow air intake channels 403 are provided inside the heating frame 4, and these air intake channels 403 communicate with the cavity 401 inside the heating frame 4. Multiple small ventilation holes 204 are evenly drilled on the first material receiving part 201 of the lower mold 2. One end of each ventilation hole 204 communicates with the material receiving cavity of the lower mold, and the other end communicates with the cavity 401. During the vulcanization operation, the air intake channels 403 are connected to an external air extraction device via pipes.

[0039] Once the vulcanization process is complete, the air extraction equipment is activated. Through the air intake channel 403 and the vent 204, the vulcanized inner tube is firmly adsorbed into the lower mold cavity, preventing the inner tube from sticking to the upper mold cavity after vulcanization.

[0040] Furthermore, the lower mold 2 has a sliding groove 205 that communicates with the vent 204, and also includes a lower pressure rod 8. The lower pressure rod 8 is slidably mounted on the lower mold 2, with one end extending out of the lower mold 2 and the other end having an abutment portion 801. A sealing rod 9 is slidably mounted in the sliding groove 205 and has an abutment surface 901. The abutment portion 801 slidably abuts against the abutment surface 901. After the lower mold 2 rises, one end of the lower pressure rod 8 abuts against the upper mold 7, causing the lower pressure rod 8 to descend and drive the sealing rod 9 to slide, so that one end of the sealing rod 9 blocks the vent 204.

[0041] Furthermore, it also includes a first elastic element 10, the two ends of which act on the sealing rod 9 and the lower mold 2 respectively, to provide a force for the sealing rod 9 to move away from the vent 204.

[0042] In this embodiment, several elongated grooves 205 are machined inside the lower mold 2, and each groove 205 is connected to a corresponding vent hole 204. The pressure rod 8 is installed on the lower mold 2 through a specific slot structure. One end of the pressure rod 8 extends out of the top of the lower mold 2, and the other end is designed as a pointed abutment part 801. The sealing rod 9 is a cuboid of suitable size, smoothly installed in the groove 205, and can slide freely. One end of the sealing rod 9 has a flat abutment surface 901.

[0043] During vulcanization, the lower mold 2 continuously rises. As it gradually approaches and comes into contact with the upper mold 7, the end of the lower pressure rod 8 extending from the lower mold 2 first contacts the upper mold 7. The upper mold 7 applies downward pressure to the lower pressure rod 8, causing it to descend. The pointed abutment portion 801 of the lower pressure rod 8 forcefully pushes the abutment surface 901 of the sealing rod 9, causing the sealing rod 9 to slide within the groove 205 towards the vent 204 until one end of the sealing rod 9 accurately seals the vent 204. This effectively prevents the vent 204 from adversely affecting the vulcanization molding effect during the critical vulcanization process, ensuring the smooth progress of the vulcanization process.

[0044] After the vulcanization process is complete, the vacuum equipment is activated to begin adsorbing the inner tube. At this time, the lower pressure rod 8 releases its contact with the upper mold 7. Under the elastic force of the first elastic element 10 (such as a spring, one end of which is connected to the sealing rod 9 and the other end is fixed in the corresponding position inside the lower mold 2), the sealing rod 9 slides in the opposite direction, opening the vent 204. This design allows the inner tube to be kept in an adsorbed state for subsequent operations, ensuring the continuity and efficiency of the operation.

[0045] The advantage lies in the fact that the ingenious design of the pressure rod 8 and the sealing rod 9 can accurately control the opening and closing state of the vent 204 according to different stages of the vulcanization process, achieving precise control of the air pressure inside the cavity. During vulcanization, sealing the vent 204 avoids abnormal vulcanization caused by the vent 204, ensuring the vulcanization molding effect. After vulcanization, the vent 204 can be opened in a timely manner, maintaining the inner tube's stable adsorption in the lower mold receiving cavity while greatly optimizing subsequent operation procedures. This effectively reduces vulcanization quality problems caused by accidental movement of the inner tube and significantly improves the stability and controllability of the entire vulcanization process.

[0046] Furthermore, it also includes a top post 11, one end of which is set on the lower mold 2. After the lower mold 2 rises, the top post 11 abuts against the upper first vulcanizing part, causing several first vulcanizing parts to rise synchronously.

[0047] In this embodiment, a top post 11 is installed at a suitable position (such as the center) in each lower mold 2. One end of the top post 11 is firmly fixed to the lower mold 2, and the other end extends upward. When the vulcanization operation begins, as the lower mold 2 rises under the push of the telescopic member 6, the top post 11 on the lower mold 2 will gradually move closer to the bottom of the upper mold 2 as the lower mold 2 rises.

[0048] When the lower mold 2 rises to a certain height, the top column 11 contacts the bottom of the upper mold 2. Due to the support and pushing effect of the top column 11, the upper mold 2 also begins to rise, thereby driving several first vulcanizing parts to rise synchronously. This ensures the coordination and consistency of the rising action among multiple first vulcanizing parts, so that the upper mold 7 can accurately contact each lower mold 2 to form a stable vulcanizing space.

[0049] The advantage lies in the ingenious design of the top column 11, which solves the problem of simultaneous upward movement of multiple vulcanizing sections. Through the transmission action of the top column 11 between adjacent lower molds 2, coordinated movement of multiple vulcanizing sections during the upward process is achieved, eliminating the need for a separate, complex synchronization drive device for each section. This not only simplifies the structure of the vulcanizing machine and reduces costs but also improves the stability and reliability of its operation, ensuring the accuracy of the vulcanization space formation. This contributes to improved vulcanization quality and production efficiency, guaranteeing that each rubber inner tube can be processed under suitable vulcanization conditions.

[0050] Furthermore, the stop rod 5 is rotatably and slidably mounted on the heating frame 4. One end of the stop rod 5 is located inside the cavity 401, having a plane 501 and an inclined surface 502, while the other end is located outside the heating frame 4. After the stop rod 5 rotates, the lower mold 2 rises and abuts against the plane 501 or the inclined surface 502. It also includes a second elastic member 12, with both ends of the second elastic member 12 acting on the stop rod 5 and the heating frame 4 respectively, to provide a force for one end of the stop rod 5 to extend into the cavity 401.

[0051] In this embodiment, the stop rod 5 is installed through a shaft hole and a sliding groove provided on the heating frame 4, allowing it to rotate around the shaft hole and slide within a certain range along the sliding groove. One end of the stop rod 5 is located inside the cavity 401, and this end is designed with a special shape having a plane 501 and an inclined plane 502; the other end is located outside the heating frame 4. A second elastic element 12 is installed on the portion of the stop rod 5 located inside the sliding groove of the heating frame 4. The second elastic element 12 can be a tension spring, with one end connected to the stop rod 5 and the other end fixed at a corresponding position inside the sliding groove of the heating frame 4.

[0052] When it is necessary to change to a different model of lower mold 2, the operator manually rotates several stop rods 5 in sequence, so that the inclined surface 502 of one end of the stop rod 5 inside the cavity 401 faces downward. Then, the equipment is started to raise the lower mold 2, and the retaining groove 203 on the edge of the lower mold 2 contacts the inclined surface 502 of the stop rod 5. As the lower mold 2 continues to rise, the retaining groove 203 compresses the inclined surface 502. Due to the guiding effect of the inclined surface 502, the stop rod 5 slides along the guide rail on the heating frame 4 in a direction away from the lower mold 2. In this way, the lower mold 2 can pass through the stop rod 5 smoothly without obstruction, thereby disengaging from the heating frame 4 and realizing the operation of quickly changing the lower mold 2.

[0053] When the vulcanization process is to begin, the operator rotates the stop lever 5 to the position where the plane 501 faces downwards. When the vulcanization process is initiated and the lower mold 2 rises, the groove 203 of the lower mold 2 contacts the plane 501 of the stop lever 5. Because the plane 501 cannot allow the stop lever 5 to slide like the inclined plane 502, the groove 203 abuts against the plane 501 of the stop lever 5 during the rising process of the lower mold 2. This allows the lower mold 2 to synchronously raise the heating frame 4, ensuring that all components work collaboratively as designed during the vulcanization process.

[0054] The advantages are that the rotatable stop bar 5, combined with the design of the plane 501 and the inclined plane 502, along with the second elastic element 12, greatly enhances the operational convenience and functional versatility of the vulcanizing machine. When changing the lower mold 2, the simple rotation of the stop bar 5 and the design of the inclined plane 502 allow the lower mold 2 to easily detach from the heating frame 4, significantly shortening mold change time and improving the maintainability of the equipment and its adaptability to different mold models. During normal vulcanization, the design of the plane 501 ensures reliable linkage between the lower mold 2 and the heating frame 4, ensuring stable vulcanization operation. The entire design optimizes the equipment's operating process, improves production efficiency, reduces potential problems caused by difficult mold changes or unstable component linkage during vulcanization, and guarantees vulcanization quality.

[0055] Furthermore, the stop bar 5 has limiting grooves 503 on both sides of the end away from the cavity 401, and the heating frame 4 has a limiting rod 404 on the outside. After the stop bar 5 rotates, the limiting rod 404 abuts against the side wall of any limiting groove 503 to limit the rotation range of the stop bar 5.

[0056] In this embodiment, two limiting grooves 503 are respectively provided on both sides of the end of the stop bar 5 away from the cavity 401 by machining. At the same time, a limiting rod 404 is installed at a corresponding position on the outside of the heating frame 4. The dimensions of the limiting rod 404 and the limiting groove 503 are matched to each other, so as to accurately realize the limiting function.

[0057] During the rotation of the stop rod 5, whether in normal vulcanization operation or when changing the lower mold 2, the limiting rod 404 will abut against the side wall of the corresponding limiting groove 503. For example, when the stop rod 5 rotates to the working position where the lower mold 2 rising stop groove 203 abuts against the plane 501, the limiting rod 404 will contact the side wall of one of the limiting grooves 503, restricting the stop rod 5 from continuing to rotate. This ensures that the plane 501 can stably cooperate with the lower mold 2 stop groove 203, realizing the function of the lower mold 2 rising and driving the heating frame 4 to rise synchronously. When rotating the stop rod 5 to change the lower mold 2, the stop rod 5 rotates to a specific angle, and the limiting rod 404 abuts against the side wall of the other limiting groove 503, preventing the stop rod 5 from rotating excessively and ensuring the stability of the stop rod 5 when interacting with the lower mold 2 stop groove 203 on the inclined plane 502.

[0058] The advantage lies in the fact that the design of the limiting rod 404 and the limiting groove 503 provides precise restriction on the rotation of the stop rod 5. This not only ensures that the stop rod 5 is accurately positioned in the predetermined position under different working modes (normal vulcanization operation and changing the lower mold 2), ensuring the correct linkage between the lower mold 2 and the heating frame 4, but also avoids equipment failure that may be caused by excessive rotation of the stop rod 5. This precise limiting function improves the accuracy and stability of equipment operation, further ensuring the smooth progress of the vulcanization process, while also extending the service life of the equipment, reducing maintenance needs caused by improper positioning of the stop rod 5, and improving production efficiency and product quality.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A vulcanizing machine for a rubber inner tube, characterized in that: include: Rack(1); A lower mold (2), the lower mold (2) being relatively raised and lowered on the frame (1), the lower mold (2) comprising a first material receiving portion (201); A top block (3), the top block (3) is arranged on the lower mold (2) in a lifting manner, the top block (3) has a second material receiving portion (301), after the top block (3) is lifted, the second material receiving portion (301) is in contact with or higher than the first material receiving portion (201), the second material receiving portion (301) and the first material receiving portion (201) are connected and combined to form a lower mold material receiving cavity, the lower mold material receiving cavity is used to abut against the inner tube.

2. A vulcanizing machine for a rubber inner tube according to claim 1, characterized in that: The top block (3) has an overlapping portion (302), and the lower mold (2) has an overlapping surface (202). After the lower mold (2) rises, the top block (3) overlaps the overlapping surface (202) via the overlapping portion (302), so that the top block (3) and the lower mold (2) rise synchronously, and further comprising: A heating rack (4), the heating rack (4) being arranged on the frame (1) in a lifting manner, the heating rack (4) having a cavity (401) therein, the lower mold (2) being arranged in the cavity (401) in a lifting manner, the bottom of the cavity (401) having a plurality of protrusions (402), after the lower mold (2) is lowered, the top block (3) abuts against the protrusions (402), so that the overlapping portion (302) and the overlapping surface (202) are released from overlapping, so that the second material receiving portion (301) is higher than the first material receiving portion (201).

3. A vulcanizing machine for a rubber inner tube according to claim 2, characterized in that: The lower mold (2) further comprises a plurality of retaining grooves (203), and further comprises: Baffle rods (5), the number of the baffle rods (5) being several, the baffle rods (5) being arranged on the heating rack (4), and after the lower mold (2) rises, the baffle grooves (203) abut against the baffle rods (5), thereby driving the heating rack (4) to rise synchronously; A telescopic member (6), wherein the telescopic member (6) is arranged on the frame (1); after the telescopic member (6) is extended, the extended end passes through the heating frame (4) and abuts against the lower mold (2), thereby pushing the lower mold (2) to rise.

4. A vulcanizing machine for a rubber inner tube according to claim 2, characterized in that: The lower mold (2), the top block (3) and the heating frame (4) together form a first vulcanization section, the first vulcanization sections are in a plurality, and the plurality of first vulcanization sections are arranged vertically at intervals, and further include: An upper mold (7), one end of which is provided with an upper mold receiving cavity, the upper mold (7) being arranged at the lower end of the frame (1) and / or the heating frame (4), and after the first vulcanization part rises, a plurality of the first vulcanization parts are sequentially approached, so that the upper mold (7) is in contact with the lower mold (2), and the upper mold receiving cavity and the lower mold receiving cavity form a vulcanization space.

5. A vulcanizing machine for a rubber inner tube according to claim 4, characterized in that: The heating rack (4) has an air suction channel (403), the air suction channel (403) is connected to the cavity (401), the first material receiving portion (201) has a plurality of air vents (204), and the two ends of the air vents (204) are respectively connected to the lower mold material receiving cavity and the cavity (401).

6. A vulcanizing machine for a rubber inner tube according to claim 5, characterized in that: The lower mold (2) has a slide groove (205) therein, the slide groove (205) is communicated with the vent hole (204), and further comprises: A lower pressing rod (8), the lower pressing rod (8) being arranged on the lower mold (2) in a lifting manner, one end of the lower pressing rod (8) extending out of the lower mold (2), and the other end of the lower pressing rod (8) having an abutting portion (801); A blocking rod (9), the blocking rod (9) being slidably disposed in the sliding groove (205), the blocking rod (9) having an abutment surface (901), the abutment portion (801) being in slidable abutment with the abutment surface (901); After the lower mold (2) rises, one end of the lower pressure rod (8) abuts against the upper mold (7), causing the lower pressure rod (8) to descend, driving the blocking rod (9) to slide, so that one end of the blocking rod (9) blocks the vent hole (204).

7. A vulcanizing machine for a rubber inner tube according to claim 6, characterized in that: Also includes: A first elastic member (10), wherein two ends of the first elastic member (10) act on the blocking rod (9) and the lower mould (2) respectively, and are used to provide a force to move the blocking rod (9) away from the vent hole (204).

8. A vulcanizing machine for a rubber inner tube according to claim 4, characterized in that: Also includes: A top column (11), one end of which is arranged on the lower mold (2); after the lower mold (2) rises, the top column (11) abuts against the first vulcanization part above, driving a plurality of the first vulcanization parts to rise synchronously.

9. A vulcanizing machine for a rubber inner tube according to claim 3, characterized in that: The blocking rod (5) is rotatably and slidably arranged on the heating frame (4); one end of the blocking rod (5) is located in the cavity (401) and has a plane (501) and an inclined surface (502); the other end is located outside the heating frame (4); after the blocking rod (5) rotates, the lower mold (2) rises and abuts against the plane (501) or the inclined surface (502); and further comprises: A second elastic member (12), two ends of the second elastic member (12) acting on the blocking rod (5) and the heating frame (4) respectively, for providing a force for one end of the blocking rod (5) to extend into the cavity (401).

10. A vulcanizing machine for a rubber inner tube according to claim 3, characterized in that: The blocking rod (5) has limiting grooves (503) on both sides of one end away from the cavity (401), and the heating frame (4) has a limiting rod (404) on the outside. After the blocking rod (5) is rotated, the limiting rod (404) abuts against any side wall of the limiting groove (503) to limit the rotation range of the blocking rod (5).

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