Automatic trimming and grinding device for curing bladder

Abstract

The invention relates to an automatic trimming and grinding device for curing capsules, and belongs to the technical field of plastic material trimming, the automatic trimming and grinding device comprises a workbench and a lifting assembly, a bottom inner supporting assembly is rotatably arranged on the workbench, the bottom supporting assembly is rotatably connected with a middle inner supporting assembly, and the middle inner supporting assembly is fixed to the workbench through a fixing assembly; the lifting assembly is provided with a first motor, the first motor is connected with a rotating plate, the rotating plate is fixedly provided with a top inner supporting assembly, the rotating plate is provided with an inflation pipe, the bottom inner supporting assembly is further provided with a linkage assembly, the workbench is provided with an air cylinder, the air cylinder is connected with a cutter, and the cutter corresponds to the middle inner supporting assembly; a collecting box is arranged in the workbench, the lifting assembly is connected with an upper protective cover, the workbench is provided with a lower protective cover, the upper protective cover and the lower protective cover form a cutter inlet when closed, and liquid discharging pipes are arranged at the positions, close to the cutter inlet, of the upper protective cover and the lower protective cover. The device has the effects of improving the grinding quality of the vulcanizing capsule and recycling grinding powder.

Description

Technical Field

[0001] The present application relates to the technical field of plastic material trimming, and in particular to an automatic trimming and grinding device for a vulcanizing bladder. Background Art

[0002] The vulcanization bladder is a hollow thin-walled rubber product of the tire vulcanizer. It is used to load the inner cavity of the tire to be vulcanized and then pass the heating medium into it, and cooperate with the vulcanizer to perform shaping and vulcanization operations. During the production process of the vulcanization bladder, the vulcanization bladder usually forms mold parting lines, seams, protrusions or burrs in the closed area of ​​the vulcanization mold. Therefore, the vulcanization bladder usually needs to be polished to eliminate the parting lines, seams, protrusions or burrs of the vulcanization bladder before it is put into use.

[0003] When grinding the vulcanization bladder, generally both ends of the vulcanization bladder are clamped with independent inner support disks, and air is inflated into the vulcanization bladder to make it swell. Then, the inner support disks at both ends are driven by motors to rotate, thereby rotating the vulcanization bladder, and finally, the cutter is fed to grind the vulcanization bladder.

[0004] However, the design of the two motors usually has a speed difference, which leads to uneven torque at both ends and uneven surface grinding. In addition, in the existing tightening mechanism of the inner support disk, a motor or a cylinder is usually used to drive the tightening block for tightening. However, the self-locking force of the motor and the cylinder is poor, and the tightening block is easy to loosen. In addition, when the surface of the capsule is not completely flat or has local protrusions, the cutter will apply uneven pressure to the capsule, which will cause slight vibration or shaking, thereby affecting the stability of grinding. Especially in the case of high requirements for surface finish, vibration or shaking will bring unnecessary grinding marks or surface defects. At the same time, when the cutter is directly pressed on the grinding area of ​​the vulcanization capsule, since the vulcanization capsule is only supported by the internal high-pressure gas, the vulcanization capsule is easy to dent when it contacts the cutter, which also affects the grinding effect of the vulcanization capsule. At the same time, a large amount of rubber dust will be generated and discharged into the air during the grinding process, which not only affects the processing environment, but also makes it impossible to recycle and reuse the dust. Summary of the invention

[0005] In order to improve the grinding quality of a vulcanizing bladder and recycle the grinding powder at the same time, the present application provides an automatic trimming and grinding device for a vulcanizing bladder.

[0006] The present application provides an automatic trimming and grinding device for a vulcanizing bladder, which adopts the following technical solution: An automatic trimming and grinding device for a vulcanizing bladder comprises a workbench and a lifting assembly, wherein a bottom inner support assembly is rotatably arranged on the workbench, the bottom support assembly is rotatably connected to a middle inner support assembly, the middle inner support assembly is fixed to the workbench through a fixing assembly, the lifting assembly is equipped with a first motor, the first motor is connected to a rotating plate, the rotating plate is fixed with a top inner support assembly, an inflatable tube is arranged on the rotating plate, a linkage assembly is also arranged on the bottom inner support assembly, a cylinder is arranged on the workbench, the cylinder is connected to a cutter, and the cutter corresponds to the middle inner support assembly; The lifting assembly is used to control the descent of the rotating plate, the first motor and the top inner support assembly. The top inner support assembly is connected to the linkage assembly when descending, and the top inner support assembly controls the bottom inner support assembly to tighten the vulcanizing bladder through the linkage assembly. After the bottom inner support assembly tightens the vulcanization bladder, the rotating plate covers the end surface of the vulcanization bladder, and the top inner support assembly continues to descend to tighten the vulcanization bladder, while the top inner support assembly tightens the vulcanization bladder; A collecting box is arranged inside the workbench, an upper guard is connected to the lifting assembly, a lower guard is arranged on the workbench, a cutting inlet is formed by the upper guard and the lower guard when closed, a drain pipe is arranged on the upper guard and the lower guard near the cutting inlet, the drain pipe can discharge the cutting fluid, and the collecting box can collect the cutting fluid.

[0007] By adopting the above technical solution, after one end of the vulcanizing bladder is put on the bottom inner support assembly, the lifting assembly controls the first motor, the rotating plate and the top inner support assembly to descend; When the top inner support assembly gradually descends, the top inner support assembly is first connected to the linkage assembly and the linkage assembly drives the bottom inner support assembly to gradually expand. When the top inner support assembly covers the top of the vulcanizing bladder, the bottom inner support assembly tightens the inner wall of the bottom end of the vulcanizing bladder. Then the rotating plate and the top inner support assembly continue to descend to further compress and fix the vulcanizing bladder. During the compressing process, the linkage assembly reversely controls the top inner support assembly to tighten the inner wall of the top of the vulcanizing bladder, and the linkage assembly serves as a connecting component between the top inner support assembly and the bottom inner support assembly. Then, air is ventilated into the inflation tube to expand the vulcanizing bladder, and then the vulcanizing bladder can be rotated for grinding. When the first motor drives the rotating plate and the top inner support assembly to rotate, the bottom inner support assembly and the linkage assembly rotate simultaneously, so that the two ends of the vulcanizing bladder can keep rotating synchronously only by the drive of the first motor.

[0008] When the rotating plate is pressed down, the inner wall of the vulcanizing bladder is tightened at the same time. Since the top inner support assembly and the bottom inner support assembly are connected by a linkage assembly, it can ensure that the top inner support assembly and the bottom inner support assembly are subjected to force synchronously during the grinding process, and provide continuous inner support force to both ends of the vulcanizing bladder through the mechanical action of compression, without relying on additional motors or cylinders, so that the top inner support assembly and the bottom inner support assembly will not loosen in the tightened state. The improvement of self-locking ability and the compression force make the vulcanizing bladder remain stable during grinding, and will not cause position displacement or loosening due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding; At the same time, because the top inner support assembly and the bottom inner support assembly are connected by a linkage mechanism and driven by the same first motor, the two ends of the vulcanization bladder can achieve synchronous rotation. This synchronization avoids the speed difference and torque unevenness that may occur in the traditional two-end independent motor method, and eliminates the uneven grinding caused by inconsistent rotation at both ends. This not only improves the grinding accuracy, but also ensures that the entire surface of the vulcanization bladder is evenly treated, thereby improving the surface finish and appearance quality of the finished product; Furthermore, the middle inner support assembly supports the cutting position of the vulcanization bladder, so that the vulcanization bladder can maintain its shape during grinding and will not dent even under the pressure of the cutter. By preventing dents, it ensures that the cutter can grind the surface of the vulcanization bladder evenly, ensuring the surface smoothness and fineness of the final product.

[0009] In summary, the technical solution of the present application can significantly improve the polishing quality of the vulcanization bladder as a whole.

[0010] At the same time, the top and bottom internal support assemblies can be supported and fixed only by the descending action of the lifting assembly, which reduces additional control components, reduces equipment maintenance and the risk of failure. After grinding is completed, only the rotating plate needs to be raised, and the top and bottom internal support assemblies can be automatically released from the tightening state. Workers can easily take out the grinded vulcanization capsules, making the operation faster and more convenient.

[0011] Moreover, during the grinding process, the upper and lower shields are closed to form a relatively closed grinding environment, and the cutting fluid is sprayed through the drain pipe to effectively avoid the splashing of powder and cutting fluid, protect the processing environment, and reduce the threat to workers' health. While spraying, the cutting fluid carries the powder generated by grinding into the collection box, and the powder can be extracted through the recycling system for secondary use, achieving the effect of environmental protection and resource recycling.

[0012] Optionally, the bottom internal support assembly includes a chassis, which is rotatably connected to the workbench, an electromagnetic clutch is installed in the workbench, the rotor of the electromagnetic clutch is connected to the chassis, the chassis is rotatably connected to a first wheel plate, the first wheel plate is provided with a plurality of first arc-shaped grooves, the chassis is slidably connected to a plurality of bottom internal support blocks, the bottom internal support blocks are connected to a first guide column, the first guide column corresponds to the first arc groove one by one and is inserted into the corresponding first arc groove.

[0013] By adopting the above technical solution, the top inner support assembly descends to drive the linkage assembly to control the rotation of the first wheel disc. At this time, the electromagnetic clutch starts to limit the rotation of the chassis, and the first guide column is pushed to move under the thrust of the first arc groove so that the bottom inner support block tightens the inner wall of the vulcanization bladder. When the rotating plate presses the vulcanization bladder and the top inner support assembly tightens the vulcanization bladder, the linkage assembly, the top inner support assembly, the first wheel disc and the chassis form a whole. After releasing the electromagnetic clutch, the first motor can drive the linkage assembly, the top inner support assembly, the first wheel disc and the chassis to rotate together.

[0014] Optionally, the top internal support assembly includes a second wheel disc, which is rotatably connected to the rotating plate, and the second wheel disc is provided with a plurality of second arc grooves, and the curvature of the second arc grooves is smaller than the curvature of the first arc grooves, and the rotating plate is slidably connected to a plurality of top internal support blocks, and the top internal support blocks are connected to second guide columns, and the second guide columns correspond one-to-one to the second arc grooves and are inserted into the corresponding second arc grooves.

[0015] By adopting the above technical solution, in the process of the rotating plate pressing the vulcanization bladder, the linkage assembly reacts on the second wheel disc to rotate the second wheel disc, and the second guide column is pushed to move under the thrust of the second arc groove so that the top inner support block tightens the inner wall of the vulcanization bladder. When the rotating plate presses the vulcanization bladder, the linkage assembly, the second wheel disc, the first wheel disc and the chassis are integrated and can rotate simultaneously. Furthermore, since the displacement of the rotating plate when it descends to cover the top of the vulcanization bladder is greater than the displacement of the rotating plate when it presses the vulcanization bladder, the design of the second arc-shaped groove having a curvature smaller than that of the first arc-shaped groove can make the first wheel plate rotate one circle or more before tightening the vulcanization bladder, thereby providing the rotating plate with sufficient displacement to descend and cover the vulcanization bladder, and making the second wheel plate rotate 90 degrees or even less than 90 degrees to tighten the vulcanization bladder, so that the top inner support block can quickly move to tighten the vulcanization bladder under the small displacement provided by the rotating plate when pressing the vulcanization bladder, thereby ensuring that the top and bottom ends of the vulcanization bladder can be tightened smoothly.

[0016] Optionally, the linkage assembly includes a support plate, wherein the support plate is located between the first wheel disc and the second wheel disc, the support plate is connected to the chassis, the first wheel disc is coaxially connected to the first rotating shaft, the first rotating shaft passes through the support plate, and one end of the first rotating shaft passing through the support plate is provided with a first spiral guide groove, the second wheel disc is coaxially connected to the second rotating shaft, the second rotating shaft is coaxial with the first rotating shaft, and the second rotating shaft is provided with a second spiral guide groove, a plurality of adjusting springs are connected to the bottom of the rotating plate, and the plurality of adjusting springs are commonly connected to an adjusting sleeve, the adjusting sleeve is passed through a telescopic rod, the telescopic rod is connected to the rotating plate, a first guide ball and a second guide ball are arranged in the adjusting sleeve, the first guide ball corresponds to the first spiral guide groove, and the second guide ball corresponds to the second spiral guide groove, a pin sleeve is arranged on the support plate, and a latch is arranged on the adjusting sleeve.

[0017] By adopting the above technical solution, when the rotating plate descends, the adjusting sleeve is inserted into the first rotating shaft, and the first guide ball applies thrust to the first spiral guide groove, so that the first rotating shaft drives the first wheel to rotate. During this process, a plurality of springs jointly press against the adjusting sleeve, thereby limiting the upward movement of the adjusting sleeve, thereby ensuring that the first rotating shaft can rotate smoothly as the rotating plate descends; When the rotating plate is covered on the vulcanizing bladder, the latch has been inserted into the pin sleeve, the bottom inner support block has supported the inner wall of the vulcanizing bladder, and the adjusting sleeve has been supported on the supporting plate. At this time, the rotating plate continues to descend to press the vulcanizing bladder, the spring is gradually compressed, the rotating plate drives the second rotating shaft to insert the adjusting sleeve, the second guide ball applies thrust to the second spiral guide groove, so that the second rotating shaft drives the second wheel to rotate, and when the rotating plate presses the vulcanizing bladder, the second wheel has driven the top inner support block to support the inner wall of the vulcanizing bladder; At this time, the rotating plate, the second wheel disc, the adjusting sleeve, the supporting plate, the chassis and the first wheel disc are all an integral whole. When the first motor drives the rotating plate to rotate, the top inner supporting block and the bottom inner supporting block rotate at the same time, thereby eliminating the differential speed at both ends of the vulcanizing bladder.

[0018] Optionally, the middle inner support assembly includes a mounting plate, the mounting plate is connected to a support column, the support column is rotatably connected to the chassis, a second motor is mounted on the mounting plate, the second motor is mounted with a gear, a rack is slidably connected to the mounting plate, the gear is meshed with the rack, and the rack is rotatably connected to a clamping wheel; The fixing component comprises an electromagnet, the electromagnet is located in the workbench, the electromagnet faces the supporting column, and the bottom of the supporting column is made of magnetic material.

[0019] By adopting the above technical solution, during the grinding process, the electromagnet is started and the support column is sucked by the electromagnet, so that the support plate and the mounting plate will not rotate relative to the workbench, thereby achieving that the clamping wheel will not move when the vulcanization bladder rotates, ensuring that the clamping wheel is always in contact with the cutter, ensuring that the cutter can evenly grind the surface of the vulcanization bladder.

[0020] Optionally, the mounting plate is an annular plate, and the mounting plate is sleeved on the middle inner support assembly. A plurality of support columns are provided, and a plurality of electromagnets are provided. The support columns correspond to the electromagnets one by one. There are two second motors, two gears, and two racks. The two second motors are symmetrically arranged about the central axis of the mounting plate. One of the clamping wheels faces the cutting edge, and the other clamping wheel faces away from the cutting edge.

[0021] By adopting the above technical solution, the relatively arranged clamping wheels can ensure that the middle part of the vulcanizing bladder is also kept in a tightened state, further ensuring that the vulcanizing bladder as a whole will not be deformed during the grinding process, which is more conducive to improving the grinding quality.

[0022] Optionally, the lifting assembly includes a lifting frame, the lifting frame is slidably connected to a lifting plate, the lifting plate is driven to lift by a servo drive unit, the servo drive unit is arranged on the lifting frame, the motor is installed on the lifting plate, and the upper guard is installed on the lifting plate.

[0023] Optionally, a first groove is formed at the bottom of the upper guard cover, and a second groove is formed at the top of the lower guard cover, an upper sliding groove is formed at the bottom of the upper guard cover along its circumference, and the upper sliding groove is opened to both sides of the first groove, and a lower sliding groove is formed at the lower guard cover along its top circumference, and the lower sliding groove is opened to both sides of the second groove, a plurality of first return springs are connected to the top wall of the upper sliding groove, and an upper clamping plate is adapted to be inserted in the upper sliding groove, and a plurality of the first return springs are jointly connected to the upper clamping plate, a plurality of second return springs are connected to the bottom wall of the lower sliding groove, and a lower clamping plate is adapted to be inserted in the lower sliding groove, and a plurality of the second return springs are jointly connected to the lower clamping plate, and when the lower clamping plate and the upper clamping plate are in contact, the first groove and the second groove jointly surround the cutting edge.

[0024] By adopting the above technical solution, when the vulcanizing bladder is in a compressed and stretched state, the upper clamping plate and the lower clamping plate are in a mutually pressed state, and the first return spring and the second return spring are both in a compressed state, which further improves the sealing effect.

[0025] Optionally, a top abutment sleeve is provided on the rotating plate, a bottom abutment sleeve is rotatably connected to the workbench, a rotating sleeve is connected to the chassis, the rotating sleeve is rotatably connected to the workbench, the rotor of the electromagnetic clutch is connected to the rotating sleeve, and the rotating sleeve is connected to the bottom abutment sleeve.

[0026] By adopting the above technical solution, before the rotating plate descends, the bottom of the vulcanization bladder can be placed between the bottom abutment sleeve and the bottom inner support assembly to achieve pre-positioning of the vulcanization bladder. When the rotating plate descends until the two ends of the vulcanization bladder are tightened, the outer walls at the two ends of the vulcanization bladder abut against the top abutment sleeve and the bottom abutment sleeve respectively, thereby strengthening the fixation of the vulcanization bladder and reducing the shaking and displacement of the vulcanization bladder during rotation.

[0027] Optionally, the top surface of the bottom abutment sleeve is set as a drainage guide surface, the top surface of the workbench is provided with a drainage chute, the drainage chute is located between the lower protective cover and the bottom abutment sleeve, a liquid inlet is opened on the workbench, the liquid inlet is connected with the drainage chute, and the collection box is connected with the liquid inlet.

[0028] By adopting the above technical solution, the cutting fluid can flow along the outer surface of the vulcanizing bladder to the drainage guide surface, then flow along the bottom abutment sleeve to the drainage chute, and finally flow into the collection box through the liquid inlet, ensuring that the cutting fluid can be smoothly recovered into the collection box.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the rotating plate is pressed down, the inner wall of the vulcanizing bladder is tightened at the same time. Since the top inner support assembly and the bottom inner support assembly are connected by a linkage assembly, it can ensure that the top inner support assembly and the bottom inner support assembly are subjected to force synchronously during the grinding process, and provide continuous inner support force to both ends of the vulcanizing bladder through the mechanical action of compression, without relying on additional motors or cylinders, so that the top inner support assembly and the bottom inner support assembly will not loosen in the tightened state. The improvement of self-locking ability and the compression force make the vulcanizing bladder remain stable during grinding, and will not cause position displacement or loosening due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding; 2. Since the top inner support assembly and the bottom inner support assembly are connected by a linkage mechanism and driven by the same first motor, the two ends of the vulcanization bladder can achieve synchronous rotation. This synchronization avoids the speed difference and torque unevenness that may occur in the traditional two-end independent motor method, and eliminates the uneven grinding caused by inconsistent rotation at both ends. This not only improves the grinding accuracy, but also ensures that the entire surface of the vulcanization bladder is evenly treated, thereby improving the surface finish and appearance quality of the finished product; 3. The middle inner support assembly supports the cutting position of the vulcanizing bladder, so that the vulcanizing bladder can maintain its shape during grinding, and will not dent even under the pressure of the cutter. By preventing the dent, it ensures that the cutter can grind the surface of the vulcanizing bladder evenly, ensuring the surface finish and fineness of the final product; 4. The top and bottom inner support assemblies can be supported and fixed only by the descending action of the lifting assembly, which reduces the number of additional control components, reduces equipment maintenance and the risk of failure. After the grinding is completed, the top and bottom inner support assemblies can be automatically released from the tightening state by only raising the rotating plate, and the workers can easily take out the polished vulcanizing bladder, which is faster and more convenient to operate. 5. During the grinding process, the upper and lower shields are closed to form a relatively closed grinding environment, and the cutting fluid is sprayed through the drain pipe to effectively avoid the splash of powder and cutting fluid, protect the processing environment, and reduce the threat to workers' health. While spraying, the cutting fluid carries the powder generated by grinding into the collection box, and the powder can be extracted through the recovery system for secondary use, achieving the effect of environmental protection and resource recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 It is a schematic structural diagram of an embodiment of the present application for reflecting a bottom inner support assembly, a middle inner support assembly and a top inner support assembly.

[0032] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0033] Figure 4 It is a schematic diagram of the structure of the first wheel disc and the first arc-shaped groove according to an embodiment of the present application.

[0034] Figure 5 It is a schematic diagram of the structure of the second wheel disc and the second arc groove used in an embodiment of the present application.

[0035] Figure 6 It is a schematic diagram of the structure of the second spiral guide groove and the second guide ball used in an embodiment of the present application.

[0036] Figure 7 It is a schematic diagram of the structure of the first spiral guide groove and the first guide ball according to an embodiment of the present application.

[0037] Explanation of the reference numerals: 1. workbench; 11. cylinder; 12. cutter; 13. drainage chute; 14. liquid inlet; 15. collection box; 16. liquid discharge pipe; 2. lifting assembly; 21. lifting frame; 22. lifting plate; 221. air inlet; 23. servo drive unit; 24. liquid storage tank; 25. air pump; 3. bottom inner support assembly; 31. bottom abutment sleeve; 311. drainage guide surface; 32. rotating sleeve; 33. electromagnetic clutch; 34. chassis; 35. mounting frame; 36. first wheel disc; 361. first arc groove; 37. first guide column; 38. bottom inner support block; 4. middle inner support assembly; 41. mounting plate; 42. support column; 43. second motor; 44. gear; 45. rack; 46. clamping wheel; 5. fixing assembly; 51. electromagnet; 61. first motor; 6 2. Rotating plate; 63. Inflatable tube; 7. Top inner support assembly; 71. Second wheel disc; 72. Second arc groove; 73. Second guide column; 74. Top inner support block; 8. Linkage assembly; 81. Support plate; 82. First rotating shaft; 821. First spiral guide groove; 83. Pin sleeve; 84. Second rotating shaft; 841. Second spiral guide groove; 85. Adjusting spring; 86. Adjusting sleeve; 861. First guide ball; 862. Second guide ball; 87. Telescopic rod; 88. Latch; 89. Top abutment sleeve; 91. Upper shield; 911. First groove; 912. Upper sliding groove; 913. First return spring; 914. Upper abutment plate; 92. Lower shield; 921. Second groove; 922. Lower sliding groove; 923. Second return spring; 924. Lower abutment plate; 93. Inlet. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The embodiment of the present application discloses an automatic edge trimming and grinding device for a vulcanizing bladder.

[0040] like Figure 1 and Figure 2The automatic trimming and grinding device for vulcanizing capsules includes a workbench 1 and a lifting assembly 2. A bottom inner support assembly 3 is rotatably arranged on the workbench 1. The bottom inner support assembly 3 is connected to a bottom abutting sleeve 31. The bottom inner support assembly 3 is sleeved in the bottom abutting sleeve 31. The bottom abutting sleeve 31 is rotatably connected to the workbench 1. The bottom inner support assembly 3 is rotatably connected to a middle inner support assembly 4. The middle inner support assembly 4 is fixed to the workbench 1 through a fixing assembly 5. The fixing assembly 5 is arranged in the workbench 1. The lifting assembly 2 is equipped with a first motor 61. The first motor 61 is connected to a rotating plate 62. A top inner support assembly 7 is arranged on the rotating plate 62. A top abutting sleeve 89 is arranged on the rotating plate 62. The top inner support assembly 7 is sleeved in the top abutting sleeve 89. An inflation tube 63 is arranged on the rotating plate 62. A linkage assembly 8 is also installed on the bottom inner support assembly 3. A cylinder 11 is installed on the workbench 1. The cylinder 11 is connected to a cutter 12. The cutter 12 corresponds to the middle inner support assembly 4. like Figure 1 ,like Figure 2 and Figure 3 , the rotating plate 62 is rotatably connected with an upper guard 91, the upper guard 91 is connected to the lifting assembly 2, the top abutment sleeve 89 is sleeved in the upper guard 91, and a lower guard 92 is fixed on the workbench 1. The upper guard 91 and the lower guard 92 are coaxially arranged, and the bottom abutment sleeve 31 is sleeved in the lower guard 92. A first groove 911 is provided at the bottom of the upper guard 91, and the first groove 911 penetrates the inner and outer side walls of the upper guard 91. An upper sliding groove 912 is provided on the bottom surface of the upper guard 91 along its circumference. The upper sliding groove 912 is opened to both sides adjacent to the first groove 911. A plurality of first return springs 913 are installed in the upper sliding groove 912, and the plurality of first return springs 913 are commonly connected to an upper clamping plate 914. The upper clamping plate 914 is an annular plate and one end of it is inserted into the upper sliding groove 912, and the other end extends out of the upper sliding groove 912; A second groove 921 is provided at the top of the lower guard 92, and the second groove 921 passes through the inner and outer side walls of the lower guard 92. A lower sliding groove 922 is provided on the top surface of the lower guard 92 along its circumference, and the lower sliding groove 922 is opened to both sides adjacent to the second groove 921. A plurality of second return springs 923 are installed in the lower sliding groove 922, and the plurality of second return springs 923 are commonly connected to a lower clamping plate 924, which is an annular plate and one end of which is inserted into the lower sliding groove 922, and the other end extends out of the lower sliding groove 922.

[0041] When the lower clamping plate 924 and the upper clamping plate 914 are pressed against each other, the first groove 911 and the second groove 921 jointly surround the knife inlet 93, the knife inlet 93 is directly opposite to the cutter 12, the top surface of the bottom abutting sleeve 31 is set as the drainage guide surface 311, the top surface of the workbench 1 is provided with a drainage chute 13, the drainage chute 13 is an annular groove, and the bottom surface of the drainage chute 13 is inclined toward the direction close to the knife inlet 93, the workbench 1 is provided with a liquid inlet 14, and the liquid inlet 14 is located between the knife inlet 93 and the bottom abutting sleeve 31, the liquid inlet 14 is connected to the lowest elevation of the bottom surface of the drainage chute 13, and the workbench 1 is provided with a collection box 15, and the collection box 15 is connected to the liquid inlet 14. The lifting assembly 2 and the workbench 1 are both equipped with a drainage pipe 16, and the drainage pipe 16 extends into the knife inlet 93.

[0042] After one end of the vulcanizing bladder is placed on the bottom inner support assembly 3, the lifting assembly 2 controls the first motor 61, the rotating plate 62 and the top inner support assembly 7 to descend; Before the rotating plate 62 descends, the bottom of the vulcanization bladder is first placed between the bottom abutting sleeve 31 and the bottom inner support assembly 3 to achieve pre-positioning of the vulcanization bladder, and then the lifting assembly 2 drives the top inner support assembly 7 to gradually descend, the top inner support assembly 7 is first connected to the linkage assembly 8, and the linkage assembly 8 drives the bottom inner support assembly 3 to gradually open, when the top inner support assembly 7 covers the top of the vulcanization bladder, the bottom inner support assembly 3 tightens the inner wall of the bottom end of the vulcanization bladder; Then the rotating plate 62 and the top inner support assembly 7 continue to descend to further compress and fix the vulcanization bladder. During the compressing process, the linkage assembly 8 reversely controls the top inner support assembly 7 to tighten the inner wall of the top of the vulcanization bladder, and the linkage assembly 8 serves as a connecting component between the top inner support assembly 7 and the bottom inner support assembly 3. Then, air is ventilated into the inflation tube 63 to expand the vulcanization bladder. The outer walls at both ends of the vulcanization bladder are respectively abutted against the top abutment sleeve 89 and the bottom abutment sleeve 31, and the bottom inner support assembly 3 and the top inner support assembly 7 are cooperated to strengthen the fixation of the vulcanization bladder. Then, the vulcanization bladder can be rotated for grinding. When the first motor 61 drives the rotating plate 62 and the top inner support assembly 7 to rotate, the bottom inner support assembly 3 and the linkage assembly 8 rotate at the same time, so that the rotating plate 62, the bottom inner support assembly 3, the linkage assembly 8, the top inner support assembly 7, the top abutment sleeve 89 and the bottom abutment sleeve 31 can be rotated by the drive of only the first motor 61, so that the two ends of the vulcanization bladder can keep rotating synchronously.

[0043] When the rotating plate 62 is pressed down, the inner wall of the vulcanizing bladder is tightened at the same time. Since the top inner support assembly 7 and the bottom inner support assembly 3 are connected by the linkage assembly 8, it can ensure that the top inner support assembly 7 and the bottom inner support assembly 3 are subjected to force synchronously during the grinding process, and provide continuous inner support force to both ends of the vulcanizing bladder through the mechanical action of compression, without relying on additional motors or cylinders, so that the top inner support assembly 7 and the bottom inner support assembly 3 will not loosen in the tightened state. The improvement of self-locking ability and the compression force make the vulcanizing bladder remain stable during grinding, and will not cause position displacement or loosening due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding; At the same time, since the top inner support assembly 7 and the bottom inner support assembly 3 are connected by a linkage mechanism and driven by the same first motor 61, the two ends of the vulcanization bladder can achieve synchronous rotation. This synchronization avoids the speed difference and torque unevenness that may occur in the traditional two-end independent motor method, and eliminates the uneven grinding phenomenon caused by inconsistent rotation at both ends. This not only improves the grinding accuracy, but also ensures that the entire surface of the vulcanization bladder is evenly processed, thereby improving the surface finish and appearance quality of the finished product; Furthermore, the middle inner support assembly 4 supports the cutting position of the vulcanization bladder, so that the vulcanization bladder can maintain its shape during grinding and will not dent even if it is subjected to the pressure of the cutter 12. By preventing the dent, it is ensured that the cutter 12 can grind the surface of the vulcanization bladder evenly, ensuring the surface smoothness and fineness of the final product.

[0044] In summary, the technical solution of the present application can significantly improve the polishing quality of the vulcanization bladder as a whole.

[0045] At the same time, the top internal support assembly 7 and the bottom internal support assembly 3 can be supported and fixed only by the descending action of the lifting assembly 2, which reduces additional control components, reduces equipment maintenance and the risk of failure, and after the grinding is completed, only the rotating plate 62 needs to be raised, and the top and bottom internal support assemblies 3 can automatically release the tightening state, so that workers can easily take out the grinded vulcanization capsules, and the operation is faster and more convenient.

[0046] Moreover, during the grinding process, the upper shield 91 and the lower shield 92 are closed to form a relatively closed grinding environment, and the cutting fluid is sprayed through the drain pipe 16 to effectively avoid the splashing of powder and cutting fluid, protect the processing environment, and reduce the threat to the health of workers. While spraying, the cutting fluid carries the powder generated by grinding along the outer surface of the vulcanizing capsule to the drainage guide surface 311, and then flows along the bottom abutment sleeve 31 to the drainage chute 13, and finally flows into the collection box 15 through the liquid inlet 14. Finally, the collection box 15 can be taken out and the cutting fluid inside can be extracted from the powder through the recovery system to achieve secondary utilization, thereby achieving the effect of environmental protection and resource recycling.

[0047] like Figure 2 and Figure 4 The bottom inner support assembly 3 includes a rotating sleeve 32, which is rotatably connected to the workbench 1. An electromagnetic clutch 33 is installed in the workbench 1. The stator of the electromagnetic clutch 33 is fixed in the workbench 1. The rotor of the electromagnetic clutch 33 is connected to the rotating sleeve 32. The bottom abutment sleeve 31 is sleeved on the rotating sleeve 32 and coaxially fixed. The rotating sleeve 32 is coaxially fixedly connected to the chassis 34. A mounting frame 35 is provided on the chassis 34. The mounting frame 35 is connected to the linkage assembly 8. The chassis 34 is rotatably connected There is a first wheel disc 36, the first wheel disc 36 is provided with four first arc grooves 361, the extension lines of the four first arc grooves 361 all pass through the center of the first wheel disc 36, the chassis 34 is slidably connected with four first guide posts 37, the first guide posts 37 are located at the bottom of the chassis 34 and can move along the radial direction of the chassis 34, the first guide posts 37 correspond to the first arc grooves 361 one by one and the first guide posts 37 are inserted into the corresponding first arc grooves 361, and the first guide posts 37 are connected with the bottom inner support block 38. The middle inner support assembly 4 is rotatably arranged on the chassis 34.

[0048] like Figure 5 The top inner support assembly 7 includes a second wheel disc 71, which is rotatably connected to the rotating plate 62. Five second arc grooves 72 are opened on the second wheel disc 71. The curvature of the second arc groove 72 is smaller than the curvature of the first arc groove 361. The extension lines of the five second arc grooves 72 all pass through the center of the second wheel disc 71. The rotating plate 62 is slidably connected with five second guide columns 73. The second guide columns 73 are located at the bottom of the rotating plate 62 and can move radially along the rotating plate 62. The second guide columns 73 correspond to the second arc grooves 72 one by one and the second guide columns 73 are inserted into the corresponding second arc grooves 72. The second guide columns 73 are connected to the top inner support block 74, and the linkage assembly 8 is connected to the rotating plate 62.

[0049] like Figure 4 , Figure 5 and Figure 6 The linkage assembly 8 includes a support plate 81, which is located between the first wheel disc 36 and the second wheel disc 71. The support plate 81 is connected to the mounting frame 35. The first wheel disc 36 is coaxially connected with a first rotating shaft 82. One end of the first rotating shaft 82 passes through the support plate 81, and the other end of the first rotating shaft 82 passes through the workbench 1 and is inserted into the rotating sleeve 32. One end of the first rotating shaft 82 passing through the support plate 81 is provided with a first spiral guide groove 821, and two pin sleeves 83 are fixed on the top of the support plate 81; like Figure 5 , Figure 6 and Figure 7The second wheel 71 is coaxially connected to a second rotating shaft 84, the second rotating shaft 84 is coaxial with the first rotating shaft 82, the second rotating shaft 84 is provided with a second spiral guide groove 841, a plurality of adjusting springs 85 are connected to the bottom of the rotating plate 62, the plurality of adjusting springs 85 are commonly connected to an adjusting sleeve 86, the adjusting sleeve 86 is penetrated with a plurality of telescopic rods 87, the telescopic rods 87 correspond to the adjusting springs 85 one by one, and the telescopic rods 87 are connected to the rotating plate 62 after passing through the corresponding adjusting springs 85, and a plurality of first guide balls 861 and a plurality of second guide balls are fixed in the adjusting sleeve 86 862, the first guide ball 861 is located at the bottom of the adjusting sleeve 86, the second guide ball 862 is located at the top of the adjusting sleeve 86, the first guide ball 861 corresponds to the first spiral guide groove 821 and the first guide ball 861 can extend into the first spiral guide groove 821, the second guide ball 862 corresponds to the second spiral guide groove 841 and the second guide ball 862 can extend into the second spiral guide groove 841, the adjusting sleeve 86 is fixed with two pins 88, the pins 88 correspond to the pin sleeves 83 one by one and the pins 88 can be inserted into the pin sleeves 83.

[0050] When the rotating plate 62 descends, the electromagnetic clutch 33 starts to attract the rotating sleeve 32 to limit the rotation of the chassis 34, and then the adjusting sleeve 86 is inserted into the first rotating shaft 82, and the first guide ball 861 applies a thrust to the first spiral guide groove 821, so that the first rotating shaft 82 drives the first wheel 36 to rotate. In this process, a plurality of adjusting springs 85 press against the adjusting sleeve 86 together, thereby limiting the upward movement of the adjusting sleeve 86, thereby ensuring that the first rotating shaft 82 can rotate smoothly as the rotating plate 62 descends; The first rotating shaft 82 drives the first wheel 36 to rotate, and the first guide column 37 is pushed to move under the thrust of the first arc groove 361, so that the bottom inner support block 38 supports the inner wall of the vulcanizing bladder tightly. At this time, the rotating plate 62 covers the vulcanizing bladder, the latch 88 has been inserted into the pin sleeve 83, and the adjusting sleeve 86 has been supported on the supporting plate 81; Then the rotating plate 62 continues to descend to press the vulcanizing bladder, the adjusting spring 85 is gradually compressed, the rotating plate 62 drives the second rotating shaft 84 to insert into the adjusting sleeve 86, and the second guide ball 862 applies a thrust to the second spiral guide groove 841, so that the second rotating shaft 84 drives the second wheel 71 to rotate, and the second guide column 73 is pushed to move under the thrust of the second arc groove 72, so that the top inner support block 74 supports the inner wall of the vulcanizing bladder; At this time, the rotating plate 62, the second disc 71, the adjusting sleeve 86, the supporting plate 81, the chassis 34, the first disc 36, the bottom abutting sleeve 31 and the top abutting sleeve 89 are all a whole. When the electromagnetic clutch 33 is released and the first motor 61 drives the rotating plate 62 to rotate, the rotating plate 62, the second disc 71, the adjusting sleeve 86, the supporting plate 81, the chassis 34, the first disc 36, the bottom abutting sleeve 31 and the top abutting sleeve 89 and the vulcanizing bladder rotate at the same time, thereby eliminating the differential speed at both ends of the vulcanizing bladder.

[0051] Furthermore, since the displacement of the rotating plate 62 when it descends to cover the top of the vulcanization bladder is greater than the displacement of the rotating plate 62 when it presses the vulcanization bladder, the design in which the curvature of the second arc groove 72 is smaller than that of the first arc groove 361 can make the first wheel 36 rotate one circle or more before tightening the vulcanization bladder, thereby providing the rotating plate 62 with sufficient displacement to descend and cover the vulcanization bladder, and making the second wheel 71 rotate 90 degrees or less than 90 degrees to tighten the vulcanization bladder, so that the top inner support block 74 can quickly move to tighten the vulcanization bladder under the small displacement provided by the rotating plate 62 to press the vulcanization bladder, thereby ensuring that the top and bottom ends of the vulcanization bladder can be tightened smoothly.

[0052] like Figure 5 The middle inner support assembly 4 includes a mounting plate 41, which is an annular plate. The mounting plate 41 is sleeved on the support plate 81. The mounting plate 41 is connected to two support columns 42. The support columns 42 are rotatably connected to the chassis 34. Two second motors 43 are installed on the mounting plate 41. The second motor 43 is installed with a gear 44. A rack 45 is slidably connected to the mounting plate 41. The gear 44 meshes with the rack 45. The rack 45 is rotatably connected with a clamping wheel 46. The two clamping wheels 46 are symmetrically arranged about the central axis of the mounting plate 41, one clamping wheel 46 faces the inlet 93, and the other clamping wheel 46 faces away from the inlet 93. The fixing assembly 5 includes two electromagnets 51, which are located inside the workbench 1. The electromagnets 51 correspond one-to-one to the support columns 42, and the electromagnets 51 are directly opposite to the bottom of the support columns 42. The bottom of the support columns 42 is made of magnetic material. The rotating groove in which the chassis 34 and the support columns 42 are rotatably connected needs to be coated with lubricating oil. The chassis 34, the bottom abutment sleeve 31, the bottom inner support block 38, the rotating sleeve 32, the first wheel disc 36 and the first rotating shaft 82 are all made of non-magnetic materials.

[0053] During the grinding process, the electromagnet 51 is started, and the electromagnet 51 attracts the support column 42, so that the support plate 81 and the mounting plate 41 will not rotate relative to the workbench 1, thereby achieving that when the vulcanization bladder rotates, the clamping wheel 46 will not move, ensuring that the clamping wheel 46 is always in contact with the cutter 12, ensuring that the cutter 12 can evenly grind the surface of the vulcanization bladder; The relatively arranged clamping wheel 46 can ensure that the middle part of the vulcanizing bladder is also kept in a tightened state, further ensuring that the vulcanizing bladder as a whole will not be deformed during the grinding process, thereby being more conducive to improving the grinding quality.

[0054] like Figure 1 and Figure 2 The lifting assembly 2 includes a lifting frame 21, the lifting frame 21 is slidably connected to a lifting plate 22, the lifting plate 22 is driven to rise and fall by a servo drive unit 23, the servo drive unit 23 is mounted on the lifting frame 21, the servo drive unit 23 is a drive system formed by a lead screw, a motor and a nut seat, and the nut seat is fixed to the lifting plate 22. The first motor 61 is mounted in the lifting plate 22, the upper shield 91 is mounted at the bottom of the lifting plate 22, and the rotating plate 62 is rotatably connected to the lifting plate 22.

[0055] The lifting plate 22 and the workbench 1 are both equipped with a liquid storage tank 24, which is used to store cutting fluid, and is connected to the drain pipe 16. A water pump is provided in the liquid storage tank 24 to supply fluid to the drain pipe 16. An air pump 25 is also rotatably installed in the lifting plate 22, and is connected to the rotating plate 62. The air pump 25 is connected to the inflation pipe 63. An air inlet 221 is provided on the lifting plate 22, and the air inlet 221 is connected to the annular groove that forms a rotatable connection between the lifting plate 22 and the air pump 25. Thus, the cutting fluid can be supplied and the vulcanizing bladder can be smoothly inflated.

[0056] The implementation principle of the embodiment of the present application is as follows: after one end of the vulcanizing bladder is put on the bottom inner support assembly 3, the lifting assembly 2 controls the first motor 61, the rotating plate 62 and the top inner support assembly 7 to descend; During the gradual descent of the top inner support assembly 7, the top inner support assembly 7 is first connected to the linkage assembly 8 and the linkage assembly 8 drives the bottom inner support assembly 3 to gradually expand. When the top inner support assembly 7 covers the top of the vulcanizing bladder, the bottom inner support assembly 3 tightens the inner wall of the bottom end of the vulcanizing bladder. Then the rotating plate 62 and the top inner support assembly 7 continue to descend to further compress and fix the vulcanization bladder. During the compressing process, the linkage assembly 8 reversely controls the top inner support assembly 7 to tighten the inner wall of the top of the vulcanization bladder, and the linkage assembly 8 serves as a connecting component between the top inner support assembly 7 and the bottom inner support assembly 3. Then, air is ventilated into the inflation tube 63 to expand the vulcanization bladder, and then the vulcanization bladder can be rotated for grinding. When the first motor 61 drives the rotating plate 62 and the top inner support assembly 7 to rotate, the bottom inner support assembly 3 and the linkage assembly 8 rotate simultaneously, so that the two ends of the vulcanization bladder can keep rotating synchronously only by the drive of the first motor 61.

[0057] When the rotating plate 62 is pressed down, the inner wall of the vulcanizing bladder is tightened at the same time. Since the top inner support assembly 7 and the bottom inner support assembly 3 are connected by the linkage assembly 8, it can ensure that the top inner support assembly 7 and the bottom inner support assembly 3 are subjected to force synchronously during the grinding process, and provide continuous inner support force to both ends of the vulcanizing bladder through the mechanical action of compression, without relying on additional motors or cylinders, so that the top inner support assembly 7 and the bottom inner support assembly 3 will not loosen in the tightened state. The improvement of self-locking ability and the compression force make the vulcanizing bladder remain stable during grinding, and will not cause position displacement or loosening due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding; At the same time, since the top inner support assembly 7 and the bottom inner support assembly 3 are connected by a linkage mechanism and driven by the same first motor 61, the two ends of the vulcanization bladder can achieve synchronous rotation. This synchronization avoids the speed difference and torque unevenness that may occur in the traditional two-end independent motor mode, and eliminates the uneven grinding phenomenon caused by inconsistent rotation at both ends. This not only improves the grinding accuracy, but also ensures that the entire surface of the vulcanization bladder is evenly processed, thereby improving the surface finish and appearance quality of the finished product.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic trimming and grinding device for a vulcanizing bladder, characterized in that: The invention comprises a workbench (1) and a lifting assembly (2), wherein a bottom inner support assembly (3) is rotatably arranged on the workbench (1), wherein the bottom inner support assembly (3) is rotatably connected to a middle inner support assembly (4), wherein the middle inner support assembly (4) is fixed to the workbench (1) via a fixing assembly (5), wherein the lifting assembly (2) is provided with a first motor (61), wherein the first motor (61) is connected to a rotating plate (62), wherein a top inner support assembly (7) is fixed to the rotating plate (62), wherein an air inflating tube (63) is arranged on the rotating plate (62), wherein the bottom inner support assembly (3) is also provided with a linkage assembly (8), wherein a cylinder (11) is installed on the workbench (1), wherein the cylinder (11) is connected to a cutter (12), wherein the cutter (12) corresponds to the middle inner support assembly (4); The lifting assembly (2) is used to control the descent of the rotating plate (62), the first motor (61) and the top inner support assembly (7); the top inner support assembly (7) is connected to the linkage assembly (8) when descending, and the top inner support assembly (7) controls the bottom inner support assembly (3) to tighten the vulcanizing bladder through the linkage assembly (8); After the bottom inner support assembly (3) tightens the vulcanization bladder, the rotating plate (62) covers the end surface of the vulcanization bladder, and the top inner support assembly (7) continues to descend to tighten the vulcanization bladder, while the top inner support assembly (7) tightens the vulcanization bladder; The workbench (1) is provided with a collecting box (15), the lifting assembly (2) is connected with an upper shield (91), the workbench (1) is provided with a lower shield (92), the upper shield (91) and the lower shield (92) form a cutting inlet (93) when closed, the upper shield (91) and the lower shield (92) are both provided with drain pipes (16) near the cutting inlet (93), the drain pipes (16) can discharge cutting fluid, and the collecting box (15) can collect cutting fluid.

2. The automatic edge trimming and grinding device for a vulcanizing bladder according to claim 1, characterized in that: The bottom inner support assembly (3) comprises a chassis (34), the chassis (34) is rotatably connected to the workbench (1), an electromagnetic clutch (33) is installed in the workbench (1), the rotor of the electromagnetic clutch (33) is connected to the chassis (34), the chassis (34) is rotatably connected to a first wheel disc (36), the first wheel disc (36) is provided with a plurality of first arc-shaped grooves (361), the chassis (34) is slidably connected to a plurality of bottom inner support blocks (38), the bottom inner support blocks (38) are connected to a first guide column (37), the first guide column (37) corresponds to the first arc-shaped groove (361) one by one and is inserted into the corresponding first arc-shaped groove (361).

3. The automatic edge trimming and grinding device for a curing bladder according to claim 2, characterized in that: The top inner support assembly (7) comprises a second wheel disc (71), the second wheel disc (71) is rotatably connected in the rotating plate (62), a plurality of second arc grooves (72) are provided on the second wheel disc (71), the curvature of the second arc grooves (72) is smaller than the curvature of the first arc grooves (361), the rotating plate (62) is slidably connected with a plurality of top inner support blocks (74), the top inner support blocks (74) are connected with second guide columns (73), the second guide columns (73) correspond to the second arc grooves (72) one by one and are inserted into the corresponding second arc grooves (72).

4. The automatic edge trimming and grinding device for a curing bladder according to claim 3, characterized in that: The linkage assembly (8) comprises a support plate (81), wherein the support plate (81) is located between the first wheel disc (36) and the second wheel disc (71), and the support plate (81) is connected to the chassis (34); the first wheel disc (36) is coaxially connected to a first rotating shaft (82), the first rotating shaft (82) passes through the support plate (81), and one end of the first rotating shaft (82) passing through the support plate (81) is provided with a first spiral guide groove (821); the second wheel disc (71) is coaxially connected to a second rotating shaft (84), the second rotating shaft (84) is coaxial with the first rotating shaft (82), and the second rotating shaft (84) is provided with a second spiral guide groove (841). The bottom of the rotating plate (62) is connected to a plurality of adjusting springs (85), and the plurality of adjusting springs (85) are commonly connected to an adjusting sleeve (86). The adjusting sleeve (86) is provided with a telescopic rod (87), and the telescopic rod (87) is connected to the rotating plate (62). A first guide ball (861) and a second guide ball (862) are arranged in the adjusting sleeve (86), and the first guide ball (861) corresponds to the first spiral guide groove (821), and the second guide ball (862) corresponds to the second spiral guide groove (841). A pin sleeve (83) is arranged on the support plate (81), and a latch (88) is arranged on the adjusting sleeve (86).

5. The automatic edge trimming and grinding device for a curing bladder according to claim 2, characterized in that: The middle inner support assembly (4) comprises a mounting plate (41), the mounting plate (41) is connected with a support column (42), the support column (42) is rotatably connected with the chassis (34), a second motor (43) is mounted on the mounting plate (41), the second motor (43) is mounted with a gear (44), a rack (45) is slidably connected to the mounting plate (41), the gear (44) is meshed with the rack (45), and the rack (45) is rotatably connected with a clamping wheel (46); The fixing assembly (5) comprises an electromagnet (51), the electromagnet (51) is located inside the workbench (1), the electromagnet (51) is directly opposite to the support column (42), and the bottom of the support column (42) is made of magnetic material.

6. The automatic edge trimming and grinding device for a curing bladder according to claim 5, characterized in that: The mounting plate (41) is an annular plate, and the mounting plate (41) is sleeved on the middle inner support assembly (4). A plurality of support columns (42) are provided, and a plurality of electromagnets (51) are provided. The support columns (42) correspond to the electromagnets (51) one by one. The number of the second motor (43), the gear (44) and the rack (45) are two each. The two second motors (43) are symmetrically arranged about the central axis of the mounting plate (41). One of the retaining wheels (46) faces the knife inlet (93), and the other retaining wheel (46) faces away from the knife inlet (93).

7. The automatic edge trimming and grinding device for a curing bladder according to claim 1, characterized in that: The lifting assembly (2) comprises a lifting frame (21), the lifting frame (21) is slidably connected to a lifting plate (22), the lifting plate (22) is driven to lift by a servo drive unit (23), the servo drive unit (23) is arranged on the lifting frame (21), the first motor (61) is mounted on the lifting plate (22), and the upper shield (91) is mounted on the lifting plate (22).

8. The automatic edge trimming and grinding device for a curing bladder according to claim 3, characterized in that: The bottom of the upper shield (91) is provided with a first groove (911), the top of the lower shield (92) is provided with a second groove (921), the bottom of the upper shield (91) is provided with an upper sliding groove (912) along its circumference, the upper sliding groove (912) is provided to both sides of the first groove (911), the lower shield (92) is provided with a lower sliding groove (922) along its top circumference, the lower sliding groove (922) is provided to both sides of the second groove (921), the top wall of the upper sliding groove (912) is connected to a plurality of first return springs (913), and the upper sliding groove (91 2) An upper clamping plate (914) is adapted and inserted, and a plurality of the first return springs (913) are connected to the upper clamping plate (914); a plurality of second return springs (923) are connected to the inner bottom wall of the lower sliding groove (922); and a lower clamping plate (924) is adapted and inserted in the lower sliding groove (922); a plurality of the second return springs (923) are connected to the lower clamping plate (924); when the lower clamping plate (924) and the upper clamping plate (914) are in contact, the first groove (911) and the second groove (921) jointly surround the knife feed edge (93).

9. The automatic edge trimming and grinding device for a curing bladder according to claim 8, characterized in that: The rotating plate (62) is provided with a top abutting sleeve (89), the workbench (1) is rotatably connected to a bottom abutting sleeve (31), the chassis (34) is connected to a rotating sleeve (32), the rotating sleeve (32) is rotatably connected to the workbench (1), the rotor of the electromagnetic clutch (33) is connected to the rotating sleeve (32), and the rotating sleeve (32) is connected to the bottom abutting sleeve (31).

10. The automatic edge trimming and grinding device for a curing bladder according to claim 9, characterized in that: The top surface of the bottom abutting sleeve (31) is arranged as a drainage guide surface (311); the top surface of the workbench (1) is provided with a drainage chute (13); the drainage chute (13) is located between the lower shield (92) and the bottom abutting sleeve (31); a liquid inlet (14) is arranged on the workbench (1); the liquid inlet (14) is communicated with the drainage chute (13); and the collection box (15) is communicated with the liquid inlet (14).

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