A high-efficiency multi-layer vulcanizing machine and its mold closing method

Abstract

This application discloses a high-efficiency multi-layer vulcanizing machine and its mold-closing method, including a frame and a support. The support includes an upper mold base disposed at the top of the vulcanizing station, a lower mold base disposed at the bottom of the vulcanizing station, and at least two middle mold bases disposed between the upper and lower mold bases. The middle mold bases are movable relative to the frame. A moving component drives the middle mold bases to move sequentially. This application achieves a breakthrough in production capacity and efficient space reuse within a limited total equipment height. Through "time-sequential differential mold opening" technology, the vertical space of each vulcanizing layer is dynamically redistributed, so that when the number of layers is increased to four or more, the total operating height of the equipment is significantly controlled, only slightly higher than that of traditional three-layer equipment, rather than increasing linearly. This fundamentally solves the industry problem that multi-layer vulcanizing machines cannot break through the three-layer limitation due to excessive equipment height and insufficient operating space.

Description

Technical Field

[0001] This application relates to the technical field of tire vulcanizing machines, and in particular to a high-efficiency multi-layer shaping vulcanizing machine and its mold closing method. Background Technology

[0002] In tire manufacturing, vulcanization is a crucial process. It uses heat and pressure to induce a chemical reaction in the green tire (carcass), ultimately resulting in a finished tire with a stable shape and excellent performance. Due to its advantages such as stable vulcanization quality and high degree of automation, the bladder vulcanizing machine is widely used in the vulcanization production of various types of tires.

[0003] Currently, domestic tire manufacturers generally use traditional multi-layer bladder vulcanizing machines to produce electric motorcycle tires with a green tire height of ≤260mm. However, due to the overall structural design of existing vulcanizing machines, especially the operating height set to accommodate manual or robotic operation, the number of layers is usually limited to three. This means that within a standard vulcanizing cycle, a single machine can vulcanize a maximum of six tires simultaneously (two mold cavities per layer).

[0004] Existing three-layer bladder vulcanizing machines can no longer meet the market's demand for high-efficiency production in terms of capacity, and their structural design limitations hinder further increases in the number of layers. Therefore, there is an urgent need in the field for a new vulcanizing machine design that can overcome the three-layer limitation and achieve higher single-machine capacity while maintaining a suitable overall height and good operability, in order to solve the practical dilemma faced by tire manufacturers. Summary of the Invention

[0005] The purpose of this application is to provide a high-efficiency multi-layer vulcanizing machine and its mold closing method, which breaks through the three-layer limitation and achieves higher single-machine capacity while maintaining a suitable overall height and good operability.

[0006] In the first aspect, this application provides a high-efficiency multi-layer vulcanizing machine, which adopts the following technical solution:

[0007] A high-efficiency multi-layer vulcanizing machine includes a frame with at least one vulcanizing station; a support seat disposed within the vulcanizing station, the support seat including an upper mold seat disposed at the top of the vulcanizing station, a lower mold seat disposed at the bottom of the vulcanizing station, and at least two intermediate mold seats disposed between the upper and lower mold seats, the intermediate mold seats being movable relative to the frame; and a moving assembly that drives the intermediate mold seats to move sequentially, the moving assembly including a plurality of drive rods of different lengths fixedly connected to the intermediate mold seats and a first power source for driving the drive rods to move, the first power source having at least two strokes, each stroke being capable of driving a different number of drive rods;

[0008] Each stroke is configured to drive a specific number of push plates together with the fixed middle mold base to move synchronously, thereby realizing the time-sequential differential mold opening of each middle mold base.

[0009] By employing the above method and utilizing the combination of drive rods of different lengths and multi-stroke power sources, the time-sequential and selective driving of the middle mold base is achieved. This allows the equipment to "borrow" the vertical space of adjacent layers during mold opening, thereby arranging four or more vulcanizing mold cavities with a limited increase in the total height of the equipment. This fundamentally solves the contradiction between increasing the number of layers and excessive equipment height and insufficient operating space, significantly improving the single-machine production capacity.

[0010] Preferably, the first power source output end is fixedly connected to a plurality of push plates, each drive rod sequentially passes through all the middle mold bases, and each drive rod is fixedly connected to one of the designated middle mold bases; the push plates are slidably connected to the drive rods, and limit blocks are fixedly connected to both ends of the drive rods, with the push plates and the middle mold bases both disposed between the limit blocks.

[0011] By employing the above method, the push plate serves as a unified power transmission element with a compact structure; the drive rod passes through all intermediate mold bases and is fixed to only one, forming an ingenious mechanical selection mechanism in conjunction with the limit block. The power source can achieve precise driving of different intermediate mold bases by having the push plate contact different limit blocks, ensuring reliable mechanical linkage and simple control logic.

[0012] Preferably, the first power source is a multi-stage hydraulic cylinder, and the piston end of each stage is fixedly connected to the push plate.

[0013] By adopting the above method, the multi-stage hydraulic cylinder, as an integrated power unit, can naturally provide multiple stable and precise output strokes, adapting to the power output requirements of "time-sequential differential mold opening", and simplifying the hydraulic circuit and control system.

[0014] Preferably, the first power source is a two-stage hydraulic cylinder including a first piston and a second piston, the push plate includes a first plate and a second plate, and the middle mold base includes a first mold base, a second mold base and a third mold base from top to bottom. The first piston is connected to the first plate, the first plate is connected to the first mold base through a drive rod, the second piston is connected to the second plate, and the second plate is connected to the second mold base and the third mold base through a drive rod.

[0015] By employing the above method, a specific and optimized four-layer structure implementation scheme is provided. The cooperation between the secondary hydraulic cylinder and the two sets of push plates and tie rods achieves a clear power distribution: the second piston is responsible for driving the two lower mold bases, achieving selective action through its two strokes; the first piston is responsible for driving the uppermost mold base.

[0016] Preferably, the frame is provided with a slide rail, the lower mold base and the middle mold base are slidably connected to the slide rail, and the bottom end of the frame is provided with a second power source, the output end of the second power source being connected to the lower mold base.

[0017] By employing the above method, the slide rail ensures the alignment and stability of all moving mold bases during movement, thus guaranteeing mold closing accuracy. Separating the power sources for driving the overall mold closing and differential mold opening (the second power source and the first power source) clarifies the force flow path. The second power source provides the main mold closing force from the bottom, resulting in good equipment rigidity and smooth operation.

[0018] Preferably, the vulcanizing station is provided with a stepped plate fixedly connected to the frame. The stepped plate has several stepped sections, and a support plate is fixedly connected to the support. When the mold is opened, the support plate can be placed in the stepped section.

[0019] By employing the above method, during differential mold opening, the upper mold base "borrows" space from the lower, already-operated floor. The cooperation between the step plate and the support plate provides stable mechanical support for each floor in the "borrowed" state (i.e., the floor compressed to the pre-closed mold position). This ensures that during the mold opening and operation of subsequent floors, the spacing of the compressed mold cavities in the lower layer can be rigidly maintained and will not change unexpectedly due to equipment vibration or stress variations, thus providing a constant, safe, and sufficient operating space for each floor being operated.

[0020] Preferably, vulcanizing mold cavities are provided between the upper mold base and the middle mold base, between two adjacent middle mold bases, and between the middle mold base and the lower mold base. Each vulcanizing mold cavity is formed by combining an upper half mold fixed to the lower mold base and a lower half mold fixed to the upper mold base.

[0021] By adopting the above method, the specific architecture of the multi-layer vulcanizing machine was clarified, with each vulcanizing mold cavity being an independent vulcanizing unit. This structure, where the upper and lower mold halves are located on different mold bases, forms the basis for realizing step-by-step mold opening and closing. The modular structure facilitates production organization and mold maintenance.

[0022] Preferably, a heating plate and a partition are provided between the upper mold and the support, and between the lower mold and the support, and the heating plate is provided with a heat flow channel.

[0023] By employing the above method, the heating plate provides the heat energy required for vulcanization. The baffle effectively blocks heat conduction to the frame, improving heat utilization efficiency, saving energy consumption, and preventing the frame from affecting accuracy due to thermal deformation. The heat flow channels within the heating plate allow the heat medium (such as steam or hot oil) to flow evenly, forming a stable and uniform temperature field, ensuring uniform heating of all parts of the tire and significantly improving the consistency of vulcanization quality.

[0024] Preferably, both the lower mold base and the middle mold base are provided with a central component. The central component includes a third power source fixedly connected to the support, a first fixing member fixedly connected to the lower half mold, and a second fixing member fixedly connected to the output end of the third power source. The first fixing member and the second fixing member are respectively connected to a deformation bladder. The first fixing connection is provided with a plurality of air pressure pipes that communicate with the deformation bladder.

[0025] By employing the above method, during the vulcanization process, a high-temperature and high-pressure medium (such as superheated water or high-pressure nitrogen) is introduced into the deformation bladder through a pneumatic pipeline, causing it to expand significantly under heat and pressure. The expanded deformation bladder tightly fills the internal space of the green tire (carcass), generating uniform and strong radial pressure on the tire carcass, thereby forcing the tread and sidewall parts of the green tire to fit tightly and fully against the mold pattern of the vulcanization mold cavity.

[0026] Secondly, this application provides a mold closing method for a high-efficiency multi-layer vulcanizing machine, which adopts the following technical solution: including the above-mentioned high-efficiency multi-layer vulcanizing machine and at least three intermediate mold bases, and the specific steps are as follows;

[0027] S1; Control the second power source to drive the lower mold base downward, so that at least one vulcanizing mold cavity at the bottom opens and the tire operation of that layer is performed;

[0028] S2: After completing the bottom layer operation, control the first power source to execute the first stroke, drive the first set of middle mold bases to move downward. This action simultaneously compresses the space of the bottom layer that has been operated, and opens at least one vulcanizing mold cavity in the middle, and performs tire operation on that layer.

[0029] S3: After completing the middle layer operation, control the first power source to execute the second stroke, drive the second set of middle mold bases to move downward. This action simultaneously compresses the space of the middle layer that has been operated, and opens the uppermost vulcanizing mold cavity to perform the tire operation of that layer.

[0030] S4: After all tire operations are completed, control the second power source to drive all mold bases upward to complete mold closing, and control the first power source to reset.

[0031] By employing the above method, a spatial reuse control logic of "bottom-up, time-sequential differential mold opening" is achieved. The core of this method lies in not opening all layer spacings simultaneously and equally, but rather redistributing the mold opening action in time and space through precise intervention of different strokes of the first power source. Its direct benefit is that, in the mold-opening state, the longitudinal space of the vulcanized layer that has already undergone loading and unloading operations is dynamically "borrowed" for subsequent vulcanized layers that need to be opened. This allows the total operating height of the equipment, when successfully increased to four or more layers, to be only slightly higher than that of a traditional three-layer equipment, rather than increasing linearly. Thus, within limited factory space and equipment manufacturing costs, a significant increase in single-machine capacity of approximately 33% or more is achieved, while ensuring sufficient and safe operating space for each layer.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. Achieved breakthroughs in production capacity and efficient space utilization within a limited total equipment height. Through "time-sequence differential mold opening" technology, the vertical space of each vulcanizing layer is dynamically redistributed. This significantly controls the total operating height of the equipment when increasing to four or more layers, keeping it only slightly higher than traditional three-layer equipment, rather than increasing linearly. This fundamentally solves the industry problem of multi-layer vulcanizing machines being unable to break through the three-layer limitation due to excessive equipment height and insufficient operating space, and achieves a significant increase in single-machine capacity of approximately 33% or more.

[0034] 2. By utilizing a hardware combination of drive rods of varying lengths and multi-stroke power sources (such as multi-stage hydraulic cylinders), along with a push plate and limit blocks, a sophisticated mechanical program control logic is constructed. This mechanism eliminates the need for independent power sources and complex electrical controls for each mold base, enabling selective and sequential driving of the mold base. The system features direct mechanical linkage, high reliability, and simplifies the hydraulic circuit and electrical control system, reducing manufacturing costs and maintenance complexity. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0036] Figure 2 This application Figure 1 The front view;

[0037] Figure 3 This is a schematic diagram of the overall structure of the stepped plate in Embodiment 1 of this application;

[0038] Figure 4 This is a schematic diagram of the overall structure of the receiving plate in Embodiment 1 of this application;

[0039] Figure 5 This is a schematic diagram of the overall structure of the central component in Embodiment 1 of this application;

[0040] Figure 6 This application Figure 5 A sectional view;

[0041] Figure 7 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0042] Figure 8 This application Figure 7 The front view;

[0043] Figure 9 This application Figure 7 Rear view;

[0044] Figure 10 It is the moving component of Embodiment 2 of this application;

[0045] Figure 11 This application Figure 10 The front view.

[0046] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Vulcanizing station; 111. First zone; 112. Second zone; 113. Third zone; 114. Fourth zone; 12. Step plate; 121. Step section; 1211. First part; 1212. Second part; 1213. Third part; 2. Moving component; 21. First power source; 211. First piston; 212. Second piston; 22. First plate; 23. Second plate; 24. Delay component; 241. First connecting plate; 242. Second connecting plate; 243. Smooth rod; 3. Support; 31. Upper mold base; 32. Middle mold base; 321. First mold base; 322. ... 323. Second mold base; 33. Third mold base; 34. Lower mold base; 35. Heating plate; 36. Partition plate; 37. Connecting block; 48. Support plate; 49. Drive rod; 40. First rod; 41. Second rod; 42. Group a rod; 43. First pull rod; 43. Rod sleeve; 44. Group b rod; 44. Second pull rod; 45. Group c rod; 45. Third pull rod; 46. Limiting block; 5. Second power source; 67. Central assembly; 61. Third power source; 62. First fixing component; 63. Second fixing component; 64. Deformation bladder; 65. Pressure plate; 78. Vulcanizing mold cavity; 79. Upper mold half; 70. Lower mold half; 80. Slide rail. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1 - Appendix Figure 11 This application will be described in further detail.

[0048] This application discloses a high-efficiency multi-layer vulcanizing machine and its mold closing method.

[0049] Example 1, referring to Figure 1 and Figure 2A high-efficiency multi-layer vulcanizing machine includes a frame 1, a support 3, a moving component 2, and a second power source 5. In this embodiment 1, the frame 1 is provided with two vulcanizing positions 11. The support 3 includes an upper mold base 31 fixedly connected to the frame 1 at the top of the vulcanizing position 11, a lower mold base 33 located at the bottom of the vulcanizing position 11 and connected to the output end of the second power source 5, and three intermediate mold bases 32 located between the upper mold base 31 and the lower mold base 33.

[0050] The frame 1 is fixedly connected to the slide rail 8, and the middle mold base 32 can move vertically along the slide rail 8.

[0051] refer to Figure 1 and Figure 2 The support 3 divides the vulcanizing position 11 into four zones from high to low: the first zone 111, the second zone 112, the third zone 113, and the fourth zone 114. Each zone is equipped with an upper mold 71 and a lower mold 72 connected to the support 3. The upper mold base 31 is fixedly connected to the upper mold 71, the lower mold base 33 is fixedly connected to the lower mold 72, the top of the middle mold base 32 is fixedly connected to the lower mold 72, and the bottom of the middle mold base 32 is fixedly connected to the upper mold 71. The upper mold 71 and the lower mold 72 form a vulcanizing cavity 7. The output end of the moving component 2 is connected to the middle mold base 32 by setting rods of different lengths. With the cooperation of the drive rods 4 of different lengths and the multi-stroke power source, the time-sequential and selective driving of the middle mold base 32 is realized. This allows the equipment to "borrow" the vertical space of adjacent layers when opening the mold, thus arranging four or more vulcanizing mold cavities 7 under the premise of limited increase in the total height of the equipment. This fundamentally solves the contradiction between increasing the number of layers and excessive equipment height and insufficient operating space, and significantly improves the single machine capacity.

[0052] refer to Figure 1 and Figure 2 The moving component 2 includes a first power source 21 fixedly connected to the top of the frame 1, two push plates disposed at the output end of the first power source 21, and a drive rod 4 slidably connected to the push plates. In this embodiment 1, the first power source 21 adopts a two-stage hydraulic cylinder as an example, with a structure of a large cylinder liner and a small cylinder. When hydraulic oil enters from the bottom oil port, it acts on the bottom of the first piston 211 and the second piston 212 at the same time. According to F (force) = P (pressure) × S (area), under the same oil pressure, the first piston 211 with a larger cylinder diameter will extend first, and the second piston 212 will extend after it reaches its position; conversely, when retracting, the second piston 212 retracts first, and then the first piston 211 retracts.

[0053] refer to Figure 1 and Figure 2Both the first piston 211 and the second piston 212 are fixedly connected to the push plate. In this embodiment, there are two drive rods 4, which are fixedly connected to the push plate. For clarity, the three middle mold bases 32 are named from top to bottom as the first mold base 321, the second mold base 322, and the third mold base 323. The drive rods 4 are named as the first rod 41 and the second rod 42, respectively. The length of the first rod 41 is less than that of the second rod 42. Each middle mold base 32 is fixedly connected to a connecting block 36. The first rod 41 is fixedly connected to the connecting block 36 of the first mold base 321, and the second rod 42 is fixedly connected to the connecting block 36 of the second mold base 322. The second rod 42 passes through the connecting block 36 of the third mold base 323. Limiting blocks 46 are provided at both ends of the second rod 42 and at the top of the first rod 41. The limiting blocks 46 can abut against the push plate and the connecting block 36 of the third mold base 323 respectively. The third mold base 323 is located between the limiting block 46 at the bottom of the second rod 42 and the limiting block 46 below the second rod 42. The limiting blocks 46 are fixed to the drive rod 4 by nuts.

[0054] During mold closing, the second power source 5 drives the lower mold base 33 to rise, causing all the supports 3 to abut against each other. When a vulcanization cycle ends, the first piston 211 and the second piston 212 are fully extended. The mold opening process is as follows: First, when the second power source 5 drives the lower mold base 33 to move downward, both the first piston 211 and the second piston 212 are in the extended state. The third mold base 323 moves under the action to abut against the limiting block 46 of the second rod 42. At this time, the third zone 113 is in the mold opening state. When the third mold base 323 abuts against the limiting block 46 of the second rod 42... When the limit block 46 abuts, the second power source 5 drives the lower mold base 33 to continuously descend, realizing the opening of the fourth zone 114; then the second piston 212 retracts, and under the action of gravity, the second mold base 322 will move downward, realizing the opening of the second zone 112. During the opening of the second zone 112, the height of the fourth zone 114 will be compressed to compensate for the opening height of the second zone 112; finally, the first piston 211 retracts, realizing the opening of the first zone 111. At this time, the heights of the third zone 113 and the fourth zone 114 are further compressed.

[0055] This allows the equipment to "borrow" the vertical space of adjacent layers when opening the mold, thus arranging four or more vulcanizing mold cavities 7 under the premise of limited increase in the total height of the equipment. This fundamentally solves the contradiction between increasing the number of layers and excessive equipment height and insufficient operating space, and significantly improves the single machine capacity.

[0056] refer to Figure 3 and Figure 4Each vulcanizing station 11 is provided with symmetrically arranged stepped plates 12 fixedly installed on the frame 1. In this embodiment 1, the stepped plate 12 is an integral casting or welded part, and its inner working surface is machined with several stepped sections 121. The stepped sections 121 are distributed equidistantly or unequally along the vertical direction, and their number corresponds to the number of lower mold bases 33 and middle mold bases 32, or is more than the number of lower mold bases 33 and middle mold bases 32 to provide more positioning options. The upper surface of each stepped section 121 is a finished horizontal bearing surface.

[0057] Each support 3 has a horizontally extending receiving plate 37 fixedly connected to its side. The receiving plate 37 is usually a heavy steel plate, and its position is precisely calculated so that when the support 3 moves to its preset specific mold opening height, the lower surface of the receiving plate 37 can make full contact with the upper surface of the corresponding step.

[0058] In this embodiment 1, the number of stepped portions 121 is 3, which are, from top to bottom, the first portion 1211, the second portion 1212, and the third portion 1213. The first portion 1211 is used to receive the first mold base 321, the second portion 1212 is used to receive the second mold base 322, and the third portion 1213 is used to receive the third mold base 323. When the first area 111 needs to be molded, the first mold base 321, the second mold base 322, and the third mold base 323 simultaneously descend onto the stepped portions 121, so that the space of the second area 112, the third area 113, and the fourth area 114 is compressed at equal intervals, providing mold opening space for the first area 111.

[0059] refer to Figure 5 Heating plates 34 and partitions 35 are provided between the upper mold 71 and the support 3, and between the lower mold 72 and the support 3. The heating plates 34 are provided with heat flow channels, and during the vulcanization process, the heating plates 34 can transfer heat to the upper mold 71 and the lower mold 72.

[0060] refer to Figure 6 Both the lower mold base 33 and the middle mold base 32 are provided with a central assembly 6. The central assembly 6 includes a third power source 61 fixedly connected to the support 3, a first fixing member 62 fixedly connected to the lower half mold 72, and a second fixing member 63 fixedly connected to the output end of the third power source 61. The first fixing member 62 and the second fixing member 63 are respectively connected to a deformation bladder 64. The first fixing connection is provided with a plurality of air pressure pipes communicating with the deformation bladder 64. In this embodiment 1, the third power source 61 is a hydraulic cylinder as an example.

[0061] Through holes are provided on the upper mold 71, lower mold 72, partition plate 35, heating plate 34, middle mold base 32 and lower mold base 33. The axes of the through holes are collinear. The first fixing member 62 is fixedly connected to the through hole of the lower mold 72. The end of the third power source 61 is fixedly connected to the first fixing member 62. The output end of the third power source 61 is fixedly connected to the second fixing member 63 and can pass through the first fixing member 62. The first fixing member 62 and the second fixing member 63 adopt a combined structure, including two pressure plates 65 connected by bolts. The two sides of the deformation bladder 64 are respectively located between the two pressure plates 65. The deformation bladder 64, the first fixing member 62 and the second fixing member 63 form a deformable bladder cavity. When vulcanizing, the bladder cavity expands so that the tire is tightly attached to the upper mold 71 and the lower mold 72.

[0062] Example 2, Reference Figure 7 , Figure 8 and Figure 9 Unlike the more ingeniously designed moving component 2 in Embodiment 1, for ease of description, the push plates are named the first plate 22 and the second plate 23. The first plate 22 is fixedly connected to the first piston 211, and the second plate 23 is connected to the second piston 212. The drive rods 4 are named rod group a, rod group b, and rod group c, and the three rod groups are respectively connected to the first mold base 321, the second mold base 322, and the third mold base 323. Rod group a passes through the first plate 22 and the second plate 23, while rod groups b and c both pass through the second plate 23. The second plate 23 is slidably connected to a delay element 24, which includes two light rods 243 passing through the second plate 23, a first connecting plate 241 and a second connecting plate 242 fixedly connected to the ends of the light rods 243, the second connecting plate 242 being located between the first plate 22 and the second plate 23, and rod group b passing through the first connecting plate 241.

[0063] refer to Figure 10 and Figure 11 The a-bar assembly includes a rod sleeve 432 fixedly connected to the first mold base 321 and a first pull rod 431. The rod sleeve 432 is fixedly connected to the connecting block 36 of the first mold base 321. A limiting block 46 is provided at the top of the rod sleeve 432. The limiting block 46 of the rod is located between the first plate 22 and the second plate 23. The rod sleeve 432 is mounted on the first pull rod 431. Both ends of the first pull rod 431 are provided with limiting blocks 46. There is a gap between the bottom end of the rod and the connecting block 36 of the first mold base 321. The first plate 22 When the first plate 22 is extended, it will drive the first mold base 321 to move upward. When the first piston 211 is fully extended, there is a gap between the first mold base 321 and the top of the vulcanizing position 11. When the second piston 212 is extended, the first pull rod 431 moves upward with the second plate 23. When the second mold base 322 and the first mold base 321 are about to come into contact, the bottom limiting block 46 of the first pull rod 431 abuts against the connecting block 36 of the first mold base 321, so that the first pull rod 431 bears the load of the first mold base 321.

[0064] refer to Figure 10 and Figure 11 The b-bar assembly includes a second pull rod 441, which is fixedly connected to the connecting part of the second mold base 322. The top of the second pull rod 441 is provided with a limiting block 46, which abuts against the first connecting plate 241. When the first piston 211 extends, it will first drive the delay member 24 to move upward, at which time the second mold base 322 moves upward. When the second piston 212 extends outward, the second mold base 322 remains stationary. When the first connecting plate 241 abuts against the second plate 23, the second mold base 322 abuts against the third mold base 323. When the second piston 212 continues to extend outward, the second mold base 322 and the third mold base 323 move upward together.

[0065] refer to Figure 10 and Figure 11 The C-bar assembly includes a third pull rod 451, with limiting blocks 46 at both ends. The limiting block 46 at the top of the third pull rod 451 abuts against the second plate 23. When the first piston 211 is in the retracted state, the limiting block 46 at the bottom of the third pull rod 451 is separated from the connecting block 36 of the third mold base 323. When the first piston 211 is fully extended, the limiting block 46 at the bottom of the third pull rod 451 abuts against the connecting block 36 of the third mold base 323. When the second piston 212 is extended, the third pull rod 451 drives the third mold base 323 to rise.

[0066] During mold closing, the second power source 5 drives the lower mold base 33 to rise, causing all the supports 3 to abut against each other. When a vulcanization cycle ends, the first piston 211 and the second piston 212 are fully extended. The mold opening process of Example 2 is as follows: First, the second power source 5 drives the lower mold base 33 to descend, and the first mold base 321, the second mold base 322, and the third mold base 323 are in the closed mold state. The fourth zone 114 first achieves mold opening, and the fourth zone 114 performs tire removal and spare tire handling. The second piston 212 retracts, so that when the second connecting plate 242 abuts against the first plate 22, the second mold base 322 and the third mold base 323 descend, and the second zone 112 and the third zone 113 are both in the semi-open mold state. In the first state, the second piston 212 continues to retract to its full position, the second mold base 322 stops moving downwards, and the third mold base 323 continues to move downwards until the third zone 113 is fully open. At this time, the fourth zone 114 and the second zone 112 are both in a semi-open mold state, and the third zone 113 is used for tire removal and spare tire preparation. When the first piston 211 retracts to half its position, the third zone 113 and the fourth zone 114 are in a closed mold state, the second zone 112 is fully open, the first zone 111 is in a semi-open mold state, and the second zone 112 is used for tire removal and spare tire preparation. When the first piston 211 retracts completely, the first zone 111 is fully open, the second zone 112 is in a semi-open mold state, and the third zone 113 and the fourth zone 114 are in a closed mold state.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency multi-layer vulcanizing machine, characterized in that: include The frame (1) is provided with at least one sulfurizing station (11). Support (3), the support (3) is disposed in the vulcanizing station (11), the support (3) includes an upper mold seat (31) disposed at the top of the vulcanizing station (11), a lower mold seat (33) disposed at the bottom of the vulcanizing station (11) and at least two middle mold seats (32) disposed between the upper mold seat (31) and the lower mold seat (33), the middle mold seats (32) being movable relative to the frame (1); The moving component (2) drives the middle mold base (32) to move sequentially. The moving component (2) includes several driving rods (4) of different lengths that are fixedly connected to the middle mold base (32) and a first power source (21) that drives the driving rods (4) to move. The first power source (21) has at least two strokes, and each stroke can drive a different number of driving rods (4). In this process, each stroke is set to drive a certain number of the drive rods (4) together with the middle mold base (32) fixed thereto to move synchronously, thereby realizing the time-sequential differential mold opening of each middle mold base (32); The first power source (21) has several push plates fixedly connected to its output end. Each drive rod (4) passes through all the middle mold bases (32) in sequence, and each drive rod (4) is fixedly connected to one of the designated middle mold bases (32). The push plate is slidably connected to the drive rod (4), and the two ends of the drive rod (4) are fixedly connected to limit blocks (46). The push plate and the middle mold base (32) are both set between the limit blocks (46). The first power source (21) is a two-stage cylinder including a first piston (211) and a second piston (212). The push plate includes a first plate (22) and a second plate (23). The middle mold base (32) includes a first mold base (321), a second mold base (322) and a third mold base (323) from top to bottom. The first piston (211) is connected to the first plate (22). The first plate (22) is connected to the first mold base (321) through a drive rod (4). The second piston (212) is connected to the second plate. The second plate (23) is connected to the second mold base (322) and the third mold base (323) through a drive rod (4).

2. The high-efficiency multi-layer vulcanizing machine according to claim 1, characterized in that: The first power source (21) is a multi-stage hydraulic cylinder, and the piston end of each stage is fixedly connected to the push plate.

3. The high-efficiency multi-layer vulcanizing machine according to any one of claims 1-2, characterized in that: The frame (1) is provided with a slide rail (8), and the lower mold base (33) and the middle mold base (32) are slidably connected to the slide rail (8) respectively. The bottom end of the frame (1) is provided with a second power source (5), and the output end of the second power source (5) is connected to the lower mold base (33).

4. The high-efficiency multi-layer vulcanizing machine according to claim 1, characterized in that: The sulfurizing station (11) is provided with a stepped plate (12) fixedly connected to the frame (1). The stepped plate (12) is provided with several stepped sections (121). The support (3) is fixedly connected with a receiving plate (37). When the mold is opened, the receiving plate (37) can be placed in the stepped section (121).

5. The high-efficiency multi-layer vulcanizing machine according to any one of claims 1-2, characterized in that: Vulcanizing mold cavities (7) are respectively provided between the upper mold base (31) and the middle mold base (32), between two adjacent middle mold bases (32), and between the middle mold base (32) and the lower mold base (33). Each vulcanizing mold cavity (7) is formed by the combination of an upper half mold (71) fixed to the bottom of the support (3) and a lower half mold (72) fixed to the top of the support (3).

6. The high-efficiency multi-layer vulcanizing machine according to any one of claims 5, characterized in that: A heating plate (34) and a partition plate (35) are provided between the upper half mold (71) and the support (3) and between the lower half mold (72) and the support (3). A heat flow channel is provided in the heating plate (34).

7. The high-efficiency multi-layer vulcanizing machine according to claim 6, characterized in that: Both the lower mold base (33) and the middle mold base (32) are provided with a central component (6). The central component (6) includes a third power source (61) fixedly connected to the support (3), a first fixing member (62) fixedly connected to the lower half mold (72), and a second fixing member (63) fixedly connected to the output end of the third power source (61). The first fixing member (62) and the second fixing member (63) are respectively connected to a deformation bladder (64). The first fixed connection is provided with several air pressure pipes that communicate with the deformation bladder (64).

8. A mold-closing method for a high-efficiency multi-layer vulcanizing machine, characterized in that: The high-efficiency multi-layer shaping vulcanizing machine of claim 7, and at least three intermediate mold bases (32), are described in the following steps; S1; Control the second power source (5) to drive the lower mold base (33) downward, so that at least one vulcanizing mold cavity (7) at the bottommost part opens and the tire operation of this layer is performed; S2: After completing the bottom layer operation, control the first power source (21) to execute the first stroke, drive the first group of middle mold bases (32) to move downward. This action simultaneously compresses the space of the bottom layer that has been operated, and opens at least one vulcanizing mold cavity (7) in the middle, and performs tire operation on that layer. S3: After completing the middle layer operation, control the first power source (21) to execute the second stroke, drive the second set of middle mold bases (32) to move downward. This action compresses the space of the middle layer that has been operated, and opens the uppermost vulcanizing mold cavity (7) to perform the tire operation of that layer. S4: After all the tire layers have been operated, control the second power source (5) to drive all the mold bases to move upward to complete the mold closing, and control the first power source (21) to reset.

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