Vacuum vulcanizing machine

Abstract

The invention relates to the technical field of rubber vulcanization, in particular to a vacuum vulcanizing machine which comprises a machine body, a workbench and a vacuum mechanism, the workbench and the vacuum mechanism are both arranged in the machine body, and the vacuum mechanism is located above the workbench and used for vacuumizing a rubber workpiece on the workbench. The workbench is movably connected with the machine body through a guiding and conveying mechanism, and a demolding mechanism used for demolding a rubber workpiece on the workbench is arranged at the position, corresponding to the workbench, of one side of the machine body. According to the invention, the condition of cracking during demolding after rubber molding can be effectively reduced, and meanwhile, the demolding efficiency and quality after rubber vulcanization molding are improved.

Description

Technical Field

[0001] The present application relates to the technical field of rubber vulcanization, and in particular to a vacuum vulcanizing machine. Background Art

[0002] The process of adding sulfur, carbon black, etc. to raw rubber and heating it under high pressure to make it vulcanized rubber is called vulcanization. After vulcanization, the rubber has changed its inherent defects such as low strength, low elasticity, cold hardness and hot stickiness, and easy aging. Its wear resistance, swelling resistance, heat resistance, etc. have been significantly improved, which has expanded its application range.

[0003] At present, vacuum vulcanizer is an important equipment specially used for the production of rubber products. It improves the performance and quality of products by vulcanizing rubber workpieces in a vacuum environment. The existing vacuum vulcanizer mainly includes a vacuum system, a heating system and a control system. When in use, the prepared rubber material is placed on the molding mold of the vulcanizer workbench, and then the control system is used to control the vacuum system to evacuate the rubber material on the workbench, and then the control system is used to control the heating system to heat the rubber material in the vacuum environment. After the temperature reaches the preset temperature, the heating is stopped, and the rubber material is taken out from the molding mold after it is cooled and the molding is stable.

[0004] However, since the rubber material will have strong adhesion to the molding mold after vulcanization, it is easy to cause cracks due to uneven force at multiple points of the rubber when demolding, affecting the demolding efficiency and quality of the rubber. Summary of the invention

[0005] In order to effectively reduce the cracking that occurs during demolding after rubber molding, and at the same time improve the demolding efficiency and quality of rubber after vulcanization molding, the present application provides a vacuum vulcanizer.

[0006] A vacuum vulcanizer comprises a machine body, a workbench and a vacuum mechanism, wherein the workbench and the vacuum mechanism are both arranged in the machine body, and the vacuum mechanism is located above the workbench and is used to evacuate a rubber workpiece on the workbench. The workbench is movably connected to the machine body through a guiding mechanism, and a demoulding mechanism for demoulding the rubber workpiece on the workbench is arranged at one side of the machine body corresponding to the workbench.

[0007] By adopting the above technical scheme, the rubber material to be vulcanized is placed on the workbench, and after the rubber material is evacuated by a vacuum mechanism, it is vulcanized under the action of the machine body; in addition, the technical scheme of the present application can guide the vulcanized rubber workpiece from the machine body to the outside through the guiding mechanism, and then the rubber workpiece cooled and formed on the workbench is separated through the demolding mechanism, thereby facilitating the separation between the rubber workpiece and the workbench, effectively improving the material taking efficiency of the rubber workpiece, and achieving the purpose of improving the production quality of the rubber workpiece.

[0008] Optionally, an upper mold and a lower mold are arranged above the workbench, the lower mold is against the surface of the workbench, and the upper mold and the lower mold are distributed up and down and are used in conjunction with each other.

[0009] By adopting the above technical solution, the upper mold and the lower mold are used in combination, so that the rubber material can be vulcanized and formed in the upper mold under vacuum, and the shapes of the upper mold and the lower mold can be changed according to the production needs of the rubber workpiece, so as to facilitate vacuum vulcanization to form rubber workpieces of different shapes and sizes.

[0010] Optionally, the demoulding mechanism includes an extension component and a lifting component, the extension component is arranged on one side of the machine body and supports the lifting component and the guiding mechanism, and the lifting component extends above the guiding mechanism to adjust the height of the upper mold above the workbench.

[0011] By adopting the above technical solution, the extension component can support the lifting component and the guiding mechanism as a whole, so that both can be used stably. At the same time, the upper mold above the workbench can be raised and lowered by the lifting component, so that different positions of the molded rubber workpiece can be more evenly stressed when separated from the lower mold by the upper mold, thereby helping to improve the efficiency and quality of demolding.

[0012] Optionally, the guiding mechanism includes an orientation component and a driving component, wherein the orientation component is arranged on the extension component to guide the movement of the workbench, and the driving component is arranged on one side of the machine body to drive the workbench to move between the machine body and the extension component.

[0013] By adopting the above technical solution, the driving component can drive the workbench, and the orienting component can guide the movement of the workbench, so that the workbench and the rubber workpiece formed on it can be stably guided out from the inside of the machine body, thereby helping to reduce cracking and damage of the rubber workpiece caused by movement.

[0014] Optionally, the demoulding mechanism further includes a lifting component, which is slidably disposed on the directional component and is transmission-connected to the lifting component to drive the lifting component to move between the upper mold and the lower mold.

[0015] By adopting the above technical solution, the lifting component can be moved between the upper mold and the lower mold under the drive of the lifting component, so as to eject the rubber workpiece formed on the inner side of the upper mold, which helps to reduce the damage and cracking of the rubber workpiece during demolding.

[0016] Optionally, the jacking assembly is connected to the lifting assembly via a linkage assembly, so that the jacking assembly can move between the upper mold and the lower mold after the upper mold is raised.

[0017] By adopting the above technical solution, the linkage component can serve as a bridge connecting the jacking component and the lifting component, so that the lifting component can control the lifting and lowering of the upper mold while also synchronously controlling the entry and exit of the jacking component between the upper mold and the lower mold.

[0018] Optionally, the lifting assembly includes a mounting part, an ejector part and a limiting part. The mounting part is slidably arranged on the orienting assembly and is transmission-connected to the lifting assembly. The ejector part is movably arranged on the inner side of the mounting part. The limiting part is arranged on the orienting assembly for positioning the ejector part so that the ejector part can be separated from the mounting part when it is located above the lower mold.

[0019] By adopting the above technical solution, the ejector can be moved between the upper mold and the lower mold under the drive of the mounting member, and the ejector can be positioned by the limit member, so that the ejector and the mounting member can be separated from each other, making it easier for the ejector to demold the molded rubber workpiece between the upper mold and the lower mold.

[0020] Optionally, the lifting assembly further comprises a reset member, which is movably arranged on a side of the mounting member close to the machine body, and the reset member can be pressed against the ejection member under the pressure of the limiting member.

[0021] By adopting the above technical scheme, the reset member can be pressed against the ejector member under the tight pressure of the limit member, so that the ejector member will not be taken out from between the upper mold and the lower mold by the mounting member under the action of the limit member. After the limit member is separated from the ejector member, the reset member will be reset to press against the side of the ejector member close to the machine body, and then the ejector member can be taken out from between the upper mold and the lower mold through the mounting member, which is convenient for the subsequent molding process of the rubber material after the upper mold and the lower mold are fitted together.

[0022] Optionally, the mounting member includes a pushing frame and a supporting rod, the pushing frame is covered and abuts against the outer side of the ejection member for pushing and driving the ejection member, and the supporting rod is slidably connected to the directional assembly and is transmission-connected to the lifting assembly.

[0023] Optionally, the ejector includes a receiving tray and a convex strip, the receiving tray is movably arranged on the inner side of the pushing frame, and a plurality of convex strips are provided and located on the receiving tray for ejecting the rubber workpiece after upper mold forming.

[0024] By adopting the above technical solution, the support rod can move along the directional assembly under the drive of the lifting assembly, and drive the pushing frame and the supporting tray as a whole to move in and out between the upper mold and the lower mold. After the supporting tray moves between the upper mold and the lower mold and is tightened by the limiter, the rubber workpiece formed in the upper mold can be ejected through multiple convex strips, so that multiple positions of the rubber workpiece are evenly stressed, thereby effectively improving the demolding efficiency and quality of the rubber workpiece.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The rubber material to be vulcanized is placed on a workbench, and the rubber material is evacuated by a vacuum mechanism, and then vulcanized under the action of the machine body; in addition, the technical solution of the application can guide the vulcanized rubber workpiece from the machine body to the outside through the guide mechanism, and then the rubber workpiece that has been cooled and formed on the workbench is separated by the demoulding mechanism, thereby facilitating the separation between the rubber workpiece and the workbench, effectively improving the material removal efficiency of the rubber workpiece, and achieving the purpose of improving the production quality of the rubber workpiece; 2. The ejector can be moved between the upper die and the lower die by the drive of the mounting part, and the ejector can be positioned by the limiter, so that the ejector and the mounting part can be separated from each other, making it easier for the ejector to demould the molded rubber workpiece between the upper die and the lower die; 3. The reset part can be folded under the tight pressure of the limit part, so that the ejector will not be taken out from between the upper mold and the lower mold by the mounting part under the action of the limit part. After the limit part is separated from the ejector, the reset part will be reset to abut against the side of the ejector close to the machine body, and then the ejector can be taken out from between the upper mold and the lower mold through the mounting part, which is convenient for the subsequent molding of the rubber material after the upper mold and the lower mold are fitted together. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the vacuum vulcanizing machine in the embodiment of the present application; Figure 2 It is a structural schematic diagram of the guiding mechanism of the embodiment of the present application; Figure 3 yes Figure 1 A magnified view of middle; Figure 4 It is a front view of a partial structure of a vacuum vulcanizing machine according to an embodiment of the present application; Figure 5 It is a schematic diagram of the structure of the directional assembly, the lifting assembly and the jacking assembly of the embodiment of the present application; Figure 6 yes Figure 2 Enlarged view of middle B; Figure 7 It is a schematic diagram of the structure of the jacking assembly of the embodiment of the present application; Figure 8 yes Figure 7 Enlarged view of C in the middle.

[0027] Explanation of reference numerals: 1, machine body; 2, workbench; 21, upper mold; 211, give way groove; 212, forming through hole; 22, lower mold; 3, vacuum mechanism; 31, vacuum cover; 32, first cylinder; 4, guide mechanism; 41, orientation assembly; 411, guide rail; 42, drive assembly; 421, third cylinder; 422, push table; 5, demoulding mechanism; 51, extension assembly; 511, bottom bracket; 512, bearing plate; 52, lifting assembly; 521, second cylinder; 522, lifting frame; 523, lifting bar; 53, lifting assembly; 531, mounting member; 531a, push frame; 531b, support rod; 531c, top support strip; 531d, locking hole; 531e, locking block; 531f, strip hole; 532, ejector; 532a, tray; 532b, convex strip; 532c, matching groove; 533, limiter; 533a, fixing block; 533b, fourth cylinder; 533c, limiter; 534, reset member; 534a, slider; 534b, spring; 534c, tightening strip; 54, linkage assembly; 541, active rack; 542, first gear; 543, first sprocket; 544, second sprocket; 545, chain; 546, accommodating box; 547, second gear; 548, driven rack; 549, linkage rod; 6, control mechanism. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-8 This application is described in further detail.

[0029] The application discloses a vacuum vulcanizing machine.

[0030] Example: Reference Figure 1-2 The vacuum vulcanizing machine includes a machine body 1, a workbench 2 and a vacuum mechanism 3. The vacuum mechanism 3 and the workbench 2 are both movably installed on the inner side of the machine body 1, and the vacuum mechanism 3 and the workbench 2 are arranged in an upper and lower distribution, and the vacuum mechanism 3 can move up and down on the inner side of the machine body 1, so as to facilitate vacuuming after the workbench 2 is sealed.

[0031] Specifically, in this embodiment, the machine body 1 includes a heating mechanism and a control mechanism 6. The heating mechanism is installed inside the vacuum mechanism 3, while the control mechanism 6 is arranged outside the machine body 1 and is electrically connected to the vacuum mechanism 3 and the heating mechanism.

[0032] Reference Figure 1In this embodiment, the vacuum mechanism 3 includes a vacuum pump and a vacuum cover 31. A first cylinder 32 is provided above the machine body 1, the vacuum cover 31 is slidably connected to the inner side of the machine body 1 and connected to the output end of the first cylinder 32, and the vacuum pump is installed above the machine body 1 and connected to the inner side of the vacuum cover 31.

[0033] Specifically, in this embodiment, the heating mechanism includes a heating plate and an electric regulating valve. The heating plate is evenly arranged on the inner side of the vacuum cover 31. The electric regulating valve is installed on the pipeline of the steam source and is connected to the heating plate.

[0034] In addition, refer to Figure 1-2 , the control mechanism 6 includes a PLC controller and a touch panel. The PLC controller is installed on the outside of the machine body 1, and the touch panel is arranged on the front of the PLC controller and is used to control the PLC controller. At the same time, the PLC controller is electrically connected to the vacuum pump, the first cylinder 32 and the electric regulating valve. In addition, in this embodiment, the workbench 2 includes an upper mold 21 and a lower mold 22. Among them, the lower mold 22 is against the upper surface of the workbench 2, and the upper mold 21 is movably installed above the lower mold 22 and can be used in conjunction with each other.

[0035] During operation, the rubber material to be vulcanized is first placed above the upper mold 21 on the workbench 2, and the PLC controller is controlled by the touch panel to electrically control the vacuum pump, the first cylinder 32 and the electric regulating valve, so that the first cylinder 32 drives the vacuum cover 31 to move downward and cover the surrounding side of the workbench 2, so that the rubber material is in a closed space, and then the vacuum cover 31 is evacuated by the vacuum pump, and the rubber material is gradually heated up under the action of the heating plate and then formed in the upper mold 21.

[0036] Reference Figure 1-4 In order to facilitate demoulding of the molded rubber workpiece, a guide mechanism 4 and a demoulding mechanism 5 are provided on one side of the machine body 1. The demoulding mechanism 5 is installed on the side wall of the machine body 1 and can abut against the upper mold 21, while the guide mechanism 4 is installed on the demoulding mechanism 5 and is slidably connected to the workbench 2.

[0037] Specifically, in this embodiment, the demoulding mechanism 5 includes an extension component 51 and a lifting component 52. The extension component 51 is fixedly mounted on the front side of the machine body 1, and the lifting component 52 is fixedly mounted above the extension component 51 and can abut against the upper mold 21 through the output end, thereby realizing the lifting control of the upper mold 21.

[0038] In addition, refer to Figure 1-24, in this embodiment, the guide mechanism 4 includes an orientation component 41 and a drive component 42. The orientation component 41 is fixed above the extension component 51 and is slidably connected to the workbench 2, while the drive component 42 is installed on one side of the machine body 1 and the output end is connected to the side wall of the workbench 2. In addition, in order to eject the rubber workpiece formed in the upper mold 21, a lifting component 53 is provided on the inner side of the orientation component 41, and the lifting component 53 is transmission-connected to the lifting component 52 through the linkage component 54.

[0039] Specifically, in this embodiment, the extension assembly 51 includes a bottom bracket 511 and a bearing plate 512. The bottom bracket 511 is extended and arranged at the front bottom of the body 1 and slidably cooperates with the front side wall of the body 1, and the bearing plate 512 is provided with two pieces and is respectively fixed on both sides of the bottom bracket 511.

[0040] At the same time, refer to Figure 3-5 In this embodiment, the lifting assembly 52 includes a second cylinder 521, a lifting frame 522 and a lifting bar 523. The second cylinder 521 is fixedly mounted on the top of the bottom bracket 511, and the lifting frame 522 is assembled at the output end of the second cylinder 521 and connected and fixed to the side wall of the directional assembly 41. In addition, two lifting bars 523 are provided in each lifting assembly 52, and the two lifting bars 523 are fixedly mounted on the side of the lifting frame 522 close to the workbench 2. Among them, two clearance grooves 211 are provided on both sides of the bottom of the upper mold 21, and the lifting bars 523 can realize the lifting and lowering adjustment of the upper mold 21 by fitting with the clearance grooves 211.

[0041] Specifically, refer to Figure 1-2 4-5, in this embodiment, the orientation assembly 41 includes a guide rail 411 and a connecting strip. Among them, two guide rails 411 are installed, and the two guide rails 411 are symmetrically installed and fixed on the inner side of the body 1 and extend to the top of the bottom bracket 511, and both sides of the workbench 2 are slidably matched with the inner side of the guide rail 411 through the connecting strip. At the same time, in this embodiment, the driving assembly 42 includes a third cylinder 421 and a pushing platform 422. The third cylinder 421 is installed and fixed on one side of the inner surface of the body 1, and the output end of the third cylinder 421 is connected to the workbench 2 through the pushing platform 422.

[0042] When in use, start the third cylinder 421, so that the push table drives the workbench 2 to move along the guide rail 411 under the drive of the third cylinder 421, and stably moves from the inside of the body 1 to the top of the bottom bracket 511 under the action of the connecting bar, and then the lifting frame 522 and the lifting bar 523 are lifted as a whole by starting the second cylinder 521, so that the lifting bar 523 is embedded in the makeshift grooves 211 on both sides of the bottom of the upper mold 21, thereby driving the separation of the upper mold 21 and the lower mold 22, so as to achieve the purpose of improving the demolding stability of the rubber workpiece after molding.

[0043] Reference Figure 2 and 4 -5, in this embodiment, the lifting assembly 53 includes a mounting member 531, an ejector member 532 and a stopper member 533. The mounting member 531 is slidably connected to the upper side of the guide rail 411 close to the bottom bracket 511, the ejector member 532 is detachably mounted on the inner side of the mounting member 531, and the stopper member 533 is arranged above the guide rail 411 and between the two lifting frames 522.

[0044] Specifically, in this embodiment, the mounting member 531 includes a push frame 531a and a support rod 531b. The push frame 531a has a U-shaped cross section, and both sides of the bottom of the push frame 531a are slidably mounted on the top of the two guide rails 411 through support rods 531b, and the side wall of one of the support rods 531b is connected to the linkage assembly 54 on the outside of the guide rail 411.

[0045] Reference Figure 2 and 4 -5, in this embodiment, the ejector 532 includes a support plate 532a and a convex strip 532b. Among them, the inner walls on both sides of the push frame 531a are extended with a top support strip 531c, and the support plate 532a is placed on the inner side of the push frame 531a and the two sides of the bottom are respectively against the two top support strips 531c. At the same time, there are multiple convex strips 532b evenly arranged, and the multiple convex strips 532b respectively correspond to the multiple molding through holes 212 opened inside the upper mold 21, so that the molding through holes 212 at multiple positions can be penetrated by the multiple convex strips 532b, so as to achieve the purpose of evenly demolding the rubber workpiece after vacuum vulcanization molding in the molding through hole 212.

[0046] In addition, refer to Figure 1-26-7, in this embodiment, the limiting member 533 includes a fixed block 533a and a fourth cylinder 533b. The fixed block 533a is installed and fixed above the guide rail 411, and the fourth cylinder 533b is installed and fixed on the side of the fixed block 533a close to the workbench 2, and a limiting block 533c is assembled at the output end of the fourth cylinder 533b. When in use, the limiting block 533c can be driven by the fourth cylinder 533b to penetrate the side wall of the push frame 531a, thereby realizing the limiting of the supporting tray 532a between the upper mold 21 and the lower mold 22.

[0047] Reference Figure 6-8 In order to facilitate the lifting assembly 53 in this embodiment, the lifting assembly 53 further includes a reset member 534. The reset member 534 is movably connected to the inner walls of the two ends of the push frame 531a close to the machine body 1. At the same time, the outer walls of both sides of the push frame 531a are provided with strip holes 531f along the length direction, and the strip holes 531f can be penetrated by the limit block 533c.

[0048] Specifically, in this embodiment, the reset member 534 includes a slider 534a, a spring 534b and a tight strip 534c. Among them, a locking hole 531d is provided on the side wall of the push frame 531a, and a locking block 531e is provided through the locking hole 531d. At the same time, the slider 534a is connected to the side wall of the locking block 531e located in the push frame 531a, the slider 534a is slidably connected to the inner wall of the push frame 531a, and a matching groove 532c that slidably matches the slider 534a is provided on the side wall of the tray 532a. The spring 534b is sleeved on the outside of the locking block 531e, and one end of the spring 534b is against the side wall of the slider 534a. In addition, the entirety of the pressing strip 534c is located inside the matching groove 532c, one end of the pressing strip 534c is connected to the locking strip and abuts against the end of the spring 534b away from the slider 534a, and the other end extends along the opening direction of the matching groove 532c.

[0049] When in use, the fourth cylinder 533b can be started to make the limit block 533c pass through the strip hole 531f to abut against the side wall of the tightening strip 534c, so that the inner side wall of the tightening strip 534c is pressed against the side wall of the supporting tray 532a. At this time, the locking block 531e will be driven by the tightening strip 534c to move towards the direction close to the supporting tray 532a, and the locking block 531e will be separated from the locking hole 531d. Then the second cylinder 521 is started again to drive the pushing frame 531a to move out from between the upper mold 21 and the lower mold 22 through the linkage assembly 54. At this time, the tightening strip 534c will slide and cooperate with the inner wall of the pushing frame 531a under the action of the slider 534a, thereby realizing the separation between the pushing frame 531a and the supporting tray 532a, so as to facilitate the subsequent descent of the upper mold 21 to abut against the multiple convex strips 532b on the supporting tray 532a, so as to achieve the purpose of stable demoulding of the rubber workpiece formed in the upper mold 21.

[0050] Reference Figure 1 and 4 -5, in this embodiment, the linkage assembly 54 includes an active rack 541, a first gear 542, a first sprocket 543, a second sprocket 544 and a chain 545. Among them, a receiving box 546 is fixedly installed on one side of the supporting plate, and the active rack 541 is fixed to the side of the piston rod of the second cylinder 521 through a linkage rod 549, and the active rack 541 extends to the inside of the receiving box 546 and is slidably connected to the side wall of the receiving box 546, and the first gear 542 is rotatably connected to the inner side of the receiving box 546 and meshes with the active rack 541. At the same time, the first sprocket 543 is coaxially rotatably connected with the first gear 542 in the receiving box 546, and the second sprocket 544 is rotatably connected to the inner top of the receiving box 546 and is transmission-coordinated with the first sprocket 543 through the chain 545.

[0051] Specifically, in this embodiment, the linkage assembly 54 further includes a second gear 547 and a driven rack 548. The second gear 547 is coaxially connected to the second sprocket 544 and is integrally located outside the receiving box 546 and extends to the bottom of the guide rail 411, while the driven rack 548 is slidably connected to the inner side of the guide rail 411 and meshes with the second gear 547. At the same time, the top of the driven rack 548 is connected to the bottom of the push frame 531a. In addition, in order to facilitate the stable sliding of the push frame 531a, a roller is fixedly installed at the bottom of the push frame 531a away from the driven rack 548, and the roller is rollingly matched with the inner wall of the guide rail 411.

[0052] When in use, the second cylinder 521 is started, so that the active rack 541 can be moved up and down under the drive of the second cylinder 521, so as to drive the first gear 542 and the first sprocket 543 to rotate synchronously. The first sprocket 543 then drives the second sprocket 544 and the second gear 547 above to rotate synchronously through the transmission of the chain 545, thereby achieving the purpose of driving the driven rack 548 and the pushing frame 531a to move as a whole along the guide rail 411, realizing the linkage operation between the second cylinder 521 and the pushing frame 531a, and further effectively improving the efficiency of demolding the rubber workpiece.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vacuum vulcanizing machine, comprising a machine body (1), a workbench (2) and a vacuum mechanism (3), wherein the workbench (2) and the vacuum mechanism (3) are both arranged in the machine body (1), and the vacuum mechanism (3) is located above the workbench (2) and is used to evacuate a rubber workpiece on the workbench (2), characterized in that: The workbench (2) is movably connected to the machine body (1) via a guide mechanism (4); a demoulding mechanism (5) for demoulding a rubber workpiece on the workbench (2) is provided at a side of the machine body (1) corresponding to the workbench (2).

2. A vacuum vulcanizing machine according to claim 1, characterized in that: An upper die (21) and a lower die (22) are arranged above the workbench (2); the lower die (22) abuts against the surface of the workbench (2); the upper die (21) and the lower die (22) are distributed up and down and are used in coordination with each other.

3. A vacuum vulcanizing machine according to claim 2, characterized in that: The demoulding mechanism (5) comprises an extension component (51) and a lifting component (52); the extension component (51) is arranged on one side of the machine body (1) and supports the lifting component (52) and the guiding mechanism (4); the lifting component (52) extends above the guiding mechanism (4) and is used to adjust the height of the upper mold (21) above the workbench (2).

4. A vacuum vulcanizing machine according to claim 3, characterized in that: The guiding mechanism (4) comprises an orientation component (41) and a driving component (42); the orientation component (41) is arranged on the extension component (51) and is used to guide the movement of the workbench (2); and the driving component (42) is arranged on one side of the machine body (1) and is used to drive the workbench (2) to move between the machine body (1) and the extension component (51).

5. A vacuum vulcanizing machine according to claim 4, characterized in that: The demoulding mechanism (5) further comprises a lifting assembly (53), wherein the lifting assembly (53) is slidably disposed on the orientation assembly (41) and is transmission-connected to the lifting assembly (52) so as to drive the lifting assembly (53) to move between the upper mold (21) and the lower mold (22).

6. A vacuum vulcanizing machine according to claim 5, characterized in that: The lifting assembly (53) is connected to the lifting assembly (52) via a linkage assembly (54), so that the lifting assembly (53) can move between the upper mold (21) and the lower mold (22) after the upper mold (21) is lifted.

7. A vacuum vulcanizing machine according to claim 5, characterized in that: The lifting component (53) comprises a mounting component (531), an ejection component (532) and a limiting component (533); the mounting component (531) is slidably arranged on the directional component (41) and is transmission-connected to the lifting component (52); the ejection component (532) is movably arranged on the inner side of the mounting component (531); and the limiting component (533) is arranged on the directional component (41) and is used to position the ejection component (532) so that the ejection component (532) can be separated from the mounting component (531) when it is located above the lower mold (22).

8. A vacuum vulcanizing machine according to claim 7, characterized in that: The lifting assembly (53) further comprises a reset member (534), wherein the reset member (534) is movably arranged on a side of the mounting member (531) close to the machine body (1), and the reset member (534) can be pressed against the ejection member (532) under the tight contact of the limiting member (533).

9. A vacuum vulcanizing machine according to claim 7, characterized in that: The mounting member (531) comprises a pushing frame (531a) and a supporting rod (531b); the pushing frame (531a) is covered and abuts against the outer side of the ejecting member (532) for pushing and driving the ejecting member (532); the supporting rod (531b) is slidably connected to the directional assembly (41) and is transmission-connected to the lifting assembly (52).

10. A vacuum vulcanizing machine according to claim 9, characterized in that: The ejector (532) comprises a receiving tray (532a) and a convex strip (532b); the receiving tray (532a) is movably arranged on the inner side of the push frame (531a); a plurality of convex strips (532b) are provided and located on the receiving tray (532a) for ejecting a rubber workpiece formed by the upper mold (21).

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