Automatic trimming and grinding device for curing bladders

Abstract

The present application relates to an automatic trimming and polishing device for vulcanization bladders, belonging to the technical field of plastic material finishing. The device comprises a workbench and a lifting assembly. A bottom inner support assembly is rotatably provided on the workbench, the bottom support assembly being rotatably connected to a middle inner support assembly, the middle inner support assembly being fixed to the workbench via a fixing assembly. The lifting assembly is equipped with a first motor, which is connected to a rotating plate, the rotating plate being fixed to a top inner support assembly, the rotating plate being equipped with an inflation tube, the bottom inner support assembly being further equipped with a linkage assembly, a cylinder being installed on the workbench, the cylinder being connected to a cutter, the cutter corresponding to the middle inner support assembly; a collection box being provided within the workbench, an upper shield being connected to the lifting assembly, and a lower shield being provided on the workbench. The upper and lower shields form a cutting edge when closed, and drainage pipes are provided near the cutting edge on both the upper and lower shields. The present application improves the polishing quality of the vulcanization bladder and can also recycle polishing 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 polishing device for a vulcanizing bladder. Background Art

[0002] A curing bladder is a hollow, thin-walled rubber product used in tire curing presses. It is used to hold the tire blank, which then receives a heating medium, and then performs the curing and curing operations in conjunction with the curing press. During the production process, the curing bladder often forms parting lines, seams, protrusions, or burrs in the closed area of the curing mold. Therefore, the curing bladder typically requires polishing to eliminate these parting lines, seams, protrusions, or burrs before return to service.

[0003] When grinding the vulcanization bladder, generally both ends of the vulcanization bladder are clamped with independent inner support plates, and air is inflated into the vulcanization bladder to make it swell. Then the inner support plates 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 polishing. In addition, the existing internal support plate tightening mechanism usually uses a motor or cylinder to drive the tightening block for tightening. However, the self-locking force of the motor and cylinder is poor, and the tightening block is easy to loosen. In addition, if the bladder surface is not completely flat or has local protrusions, the cutter will apply uneven pressure to the bladder, which will cause slight vibration or shaking, thereby affecting the stability of the polishing. Especially in cases where high surface finish requirements are required, the vibration or shaking will cause unnecessary polishing marks or surface defects. At the same time, when the cutter is directly pressed on the polishing area of the vulcanization bladder, since the vulcanization bladder is only supported by the internal high-pressure gas, the vulcanization bladder is easily dented when it contacts the cutter, which also affects the polishing effect of the vulcanization bladder. At the same time, a large amount of rubber dust is generated and discharged into the air during the polishing 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 the vulcanization bladder and recycle the grinding powder at the same time, the present application provides an automatic trimming and grinding device for the vulcanization bladder.

[0006] The present application provides an automatic trimming and polishing device for a vulcanizing bladder, which adopts the following technical solution:

[0007] An automatic trimming and polishing device for a vulcanizing bladder comprises a workbench and a lifting assembly, wherein a bottom inner support assembly is rotatably provided on the workbench, wherein the bottom support assembly is rotatably connected to a middle inner support assembly, wherein the middle inner support assembly is fixed to the workbench via a fixing assembly, wherein the lifting assembly is equipped with a first motor, wherein the first motor is connected to a rotating plate, wherein the rotating plate is fixed with a top inner support assembly, wherein an inflation tube is provided on the rotating plate, wherein the bottom inner support assembly is further equipped with a linkage assembly, wherein a cylinder is installed on the workbench, wherein the cylinder is connected to a cutter, wherein the cutter corresponds to the middle inner support assembly;

[0008] 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.

[0009] 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;

[0010] A collection box is provided in the workbench, the lifting assembly is connected to an upper guard, and the workbench is provided with a lower guard. The upper guard and the lower guard form a cutting edge when closed. The upper guard and the lower guard are both provided with drainage pipes near the cutting edge. The drainage pipes can discharge cutting fluid, and the collection box can collect cutting fluid.

[0011] By adopting the above technical solution, after one end of the vulcanizing bladder is placed on the bottom inner support assembly, the lifting assembly controls the first motor, the rotating plate and the top inner support assembly to descend;

[0012] During the process of the top inner support assembly gradually descending, 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.

[0013] Then the rotating plate and the top inner support assembly continue to descend to further compress and fix the vulcanizing bladder. During the compression process, the linkage assembly reversely controls the top inner support assembly to tighten the inner wall of the top of the vulcanizing bladder. 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. Then, the vulcanizing bladder can be rotated for polishing.

[0014] 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 by the drive of only the first motor.

[0015] When the rotating plate is pressed down, the inner wall of the vulcanizing bladder is simultaneously tightened. Because the top and bottom inner support assemblies are connected by a linkage assembly, they can ensure that the top and bottom inner support assemblies are subjected to force synchronously during the grinding process. The mechanical action of compression provides continuous inner support force to both ends of the vulcanizing bladder, without relying on additional motors or cylinders. This prevents the top and bottom inner support assemblies from loosening in the tightened state. The improved self-locking ability combined with the compression force ensures that the vulcanizing bladder remains stable during grinding, and will not shift or loosen due to pressure fluctuations or vibrations, thus ensuring the consistency of grinding.

[0016] Furthermore, because the top and bottom inner support assemblies are connected by a linkage mechanism and driven by the same primary motor, the two ends of the curing bladder rotate synchronously. This synchronization avoids the speed differences and torque imbalances that can occur with traditional independent motors at both ends, eliminating uneven polishing caused by inconsistent rotation at both ends. This not only improves polishing accuracy but also ensures a uniform treatment across the entire surface of the curing bladder, enhancing the surface finish and appearance quality of the finished product.

[0017] Furthermore, the central 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.

[0018] In summary, the technical solution of the present application can significantly improve the polishing quality of the vulcanization bladder as a whole.

[0019] 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 the need for additional control components and reduces the risk of equipment maintenance and 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 remove the polished vulcanizing bladder, making the operation faster and more convenient.

[0020] During the grinding process, the upper and lower guards close to create a relatively closed grinding environment. Cutting fluid sprays through the drain pipe, effectively preventing powder and cutting fluid from splashing, protecting the machining environment and reducing health risks to workers. The cutting fluid, while spraying, carries the powder generated by grinding into a collection tank. The powder can be extracted through a recovery system for secondary use, achieving environmental protection and resource recycling.

[0021] 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, the first wheel is provided with a plurality of first arc 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 one-to-one to the first arc groove and is inserted into the corresponding first arc groove.

[0022] 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. At this time, the electromagnetic clutch starts to limit the rotation of the chassis. Under the thrust of the first arc groove, the first guide column is pushed to move 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 and the chassis are formed into one. After releasing the electromagnetic clutch, the first motor can drive the linkage assembly, the top inner support assembly, the first wheel and the chassis to rotate together.

[0023] Optionally, the top internal support assembly includes a second wheel disc, which is rotatably connected to the rotating plate, and a plurality of second arc grooves are opened on the second wheel disc, and the curvature of the second arc grooves is smaller than the curvature of the first arc grooves. 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.

[0024] By adopting the above technical solution, when the rotating plate presses the curing bladder, the linkage assembly reacts on the second wheel disc to rotate the second wheel disc. Under the thrust of the second arc groove, the second guide post moves, so that the top inner support block presses the inner wall of the curing bladder. When the rotating plate presses the curing bladder, the linkage assembly, the second wheel disc, the first wheel disc and the chassis form a whole and can rotate simultaneously.

[0025] 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 allows the first wheel to 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 the vulcanization bladder can be tightened by rotating the second wheel 90 degrees or even less than 90 degrees. This allows the top inner support block to quickly move and tighten the vulcanization bladder even with the small displacement provided by the rotating plate when it presses the vulcanization bladder, thereby ensuring that both the top and bottom ends of the vulcanization bladder can be tightened smoothly.

[0026] The cam is connected to the chassis, the cam being coaxially connected to the first rotating shaft, the first rotating shaft passing through the support plate, the first rotating shaft passing through one end of the support plate and having a first spiral guide groove, the second wheel disc being coaxially connected to the second rotating shaft, the second rotating shaft being coaxial with the first rotating shaft, the second rotating shaft having a second spiral guide groove, the bottom of the rotating plate being connected to a plurality of adjusting springs, the plurality of adjusting springs being commonly connected to an adjusting sleeve, the adjusting sleeve being passed through a telescopic rod, the telescopic rod being connected to the rotating plate, a first guide ball and a second guide ball being arranged in the adjusting sleeve, the first guide ball corresponding to the first spiral guide groove, the second guide ball corresponding to the second spiral guide groove, a pin sleeve being arranged on the support plate, and a latch being arranged on the adjusting sleeve.

[0027] 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 number 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;

[0028] When the rotating plate is covered on the curing bladder, the latch has been inserted into the pin sleeve, the bottom inner support block has tightened the inner wall of the curing bladder, and the adjusting sleeve has been supported on the supporting plate. At this time, the rotating plate continues to descend to press the curing bladder, and the spring is gradually compressed. The rotating plate drives the second rotating shaft to insert into the adjusting sleeve. The second guide ball applies thrust to the second spiral guide groove, causing the second rotating shaft to drive the second wheel to rotate. When the rotating plate presses the curing bladder, the second wheel has driven the top inner support block to tighten the inner wall of the curing bladder.

[0029] At this time, the rotating plate, the second wheel, the adjusting sleeve, the supporting plate, the chassis and the first wheel are all an integral whole. When the first motor drives the rotating plate to rotate, the top inner support block and the bottom inner support block rotate at the same time, thereby eliminating the differential speed at both ends of the vulcanizing bladder.

[0030] Optionally, the central 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 retaining wheel;

[0031] The fixing assembly includes an electromagnet, which is located in the workbench and faces the support column. The bottom of the support column is made of magnetic material.

[0032] By adopting the above technical solution, during the grinding process, the electromagnet is started and the support column is attracted 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, and ensuring that the cutter can evenly grind the surface of the vulcanization bladder.

[0033] 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 pressure wheels faces the feed edge, and the other pressure wheel faces away from the feed edge.

[0034] By adopting the above technical solution, the relatively arranged holding wheels can ensure that the middle part of the vulcanization bladder is also kept in a tightened state, further ensuring that the vulcanization bladder as a whole will not be deformed during the grinding process, thereby being more conducive to improving the grinding quality.

[0035] Optionally, the lifting assembly includes a lifting frame, the lifting frame is slidably connected to a lifting plate, the lifting plate is driven to rise and fall 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.

[0036] Optionally, the bottom of the upper guard shield is provided with a first groove, the top of the lower guard shield is provided with a second groove, the bottom of the upper guard shield is provided with an upper sliding groove along its circumference, the upper sliding groove is opened to both sides of the first groove, and the lower guard shield is provided with a lower sliding groove along its top circumference, and the lower sliding groove is opened to both sides of the second groove, the top wall of the upper sliding groove is connected to a plurality of first return springs, and the upper sliding groove is adapted to be inserted with an upper clamping plate, several first return springs are jointly connected to the upper clamping plate, the bottom wall of the lower sliding groove is connected to a plurality of second return springs, and the lower sliding groove is adapted to be inserted with a lower clamping plate, and several second return springs are jointly connected to the lower clamping plate, and when the lower clamping plate and the upper clamping plate abut, the first groove and the second groove jointly surround the feed edge.

[0037] By adopting the above technical solution, when the vulcanization bladder is in a compressed and tightened state, the upper and lower abutting plates are in a mutually pressed state, and the first return spring and the second return spring are both in a compressed state, further improving the sealing effect.

[0038] 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.

[0039] 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 both 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.

[0040] Optionally, the top surface of the bottom abutment sleeve is set as a drainage guide surface, and the top surface of the workbench is provided with a drainage chute, the drainage chute is located between the lower shield and the bottom abutment sleeve, and a liquid inlet is provided on the workbench, the liquid inlet is connected to the drainage chute, and the collection box is connected to the liquid inlet.

[0041] 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.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] 1. When the rotating plate is pressed down, the inner wall of the vulcanizing bladder is simultaneously tightened. Since the top and bottom inner support assemblies are connected by a linkage assembly, they can ensure that the top and bottom inner support assemblies are subjected to force synchronously during the grinding process. The mechanical action of compression provides continuous inner support force to both ends of the vulcanizing bladder, without relying on additional motors or cylinders. The top and bottom inner support assemblies will not loosen in the tightened state. The improved self-locking ability combined with the compression force ensures that the vulcanizing bladder remains stable during grinding, and will not shift or loosen due to pressure fluctuations or vibrations, thus ensuring the consistency of grinding.

[0044] 2. Because the top and bottom inner support assemblies are connected by a linkage mechanism and driven by the same primary motor, both ends of the curing bladder rotate synchronously. This synchronization avoids the speed differences and torque imbalances that can occur with traditional independent motors at both ends, eliminating uneven polishing caused by inconsistent rotation at both ends. This not only improves polishing accuracy but also ensures a uniform treatment across the entire surface of the curing bladder, enhancing the surface finish and appearance quality of the finished product.

[0045] 3. The central inner support assembly supports the cutting position of the curing bladder, allowing the curing bladder to maintain its shape during grinding and not dent even under the pressure of the cutter. By preventing dents, the cutter can grind the curing bladder surface evenly, ensuring the surface finish and fineness of the final product;

[0046] 4. The top and bottom internal support assemblies can be supported and fixed simply by lowering the lifting assembly, eliminating the need for additional control components, reducing equipment maintenance and the risk of failure. After grinding is completed, the top and bottom internal support assemblies can be automatically released by simply raising the rotating plate. Workers can then easily remove the polished curing bladder, making operation faster and more convenient.

[0047] 5. During the grinding process, the upper and lower guards close to form a relatively closed grinding environment. Cutting fluid is sprayed through the drain pipe, effectively preventing powder and cutting fluid from splashing, protecting the processing environment and reducing health risks to workers. The cutting fluid, while spraying, carries the powder generated by grinding into the collection box. The powder can be extracted through the recovery system for secondary use, achieving environmental protection and resource recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0049] Figure 2 It is a structural diagram of the bottom inner support assembly, the middle inner support assembly and the top inner support assembly according to an embodiment of the present application.

[0050] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0051] Figure 4 It is a structural diagram of the first wheel disc and the first arc-shaped groove according to an embodiment of the present application.

[0052] Figure 5 It is a schematic structural diagram of the second wheel disc and the second arc-shaped groove in an embodiment of the present application.

[0053] Figure 6 It is a structural schematic diagram of the second spiral guide groove and the second guide ball in an embodiment of the present application.

[0054] Figure 7 It is a schematic structural diagram of the first spiral guide groove and the first guide ball according to an embodiment of the present application.

[0055] Explanation of the accompanying symbols: 1. workbench; 11. cylinder; 12. cutter; 13. drainage chute; 14. liquid inlet; 15. collection box; 16. drain 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. abutment 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 guard; 911. First groove; 912. Upper sliding groove; 913. First return spring; 914. Upper abutment plate; 92. Lower guard; 921. Second groove; 922. Lower sliding groove; 923. Second return spring; 924. Lower abutment plate; 93. Feed edge. DETAILED DESCRIPTION

[0056] The following is combined with Figure 1-7 This application is described in further detail.

[0057] The embodiment of the present application discloses an automatic trimming and polishing device for a vulcanizing bladder.

[0058] like Figure 1 and Figure 2The automatic trimming and grinding device for vulcanizing bladder includes a workbench 1 and a lifting assembly 2. A bottom inner support assembly 3 is rotatably provided 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 the 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 installed with a first motor 61. The first motor 61 is connected to a rotating plate 62. A top inner support assembly 7 is provided on the rotating plate 62. A top abutting sleeve 89 is provided on the rotating plate 62. The top inner support assembly 7 is sleeved in the top abutting sleeve 89. An inflation tube 63 is provided on the rotating plate 62. The bottom inner support assembly 3 is also installed with a linkage assembly 8. 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.

[0059] like Figure 1 ,like Figure 2 and Figure 3 , the rotating plate 62 is rotatably connected to the upper guard cover 91, the upper guard cover 91 is connected to the lifting assembly 2, the top abutment sleeve 89 is sleeved in the upper guard cover 91, and the lower guard cover 92 is fixed on the workbench 1. The upper guard cover 91 and the lower guard cover 92 are coaxially arranged, and the bottom abutment sleeve 31 is sleeved in the lower guard cover 92. A first groove 911 is opened at the bottom of the upper guard cover 91, and the first groove 911 passes through the inner and outer side walls of the upper guard cover 91. An upper sliding groove 912 is opened on the bottom surface of the upper guard cover 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. The plurality of first return springs 913 are commonly connected to an upper tightening plate 914. The upper tightening plate 914 is an annular plate and one end thereof is inserted into the upper sliding groove 912, and the other end extends out of the upper sliding groove 912;

[0060] 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. The lower clamping plate 924 is an annular plate and one end of it is inserted into the lower sliding groove 922, and the other end extends out of the lower sliding groove 922.

[0061] When the lower abutting plate 924 and the upper abutting plate 914 are pressed against each other, the first groove 911 and the second groove 921 jointly enclose the knife inlet 93, which 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, which is an annular groove, and the bottom surface of the drainage chute 13 is inclined toward the direction of 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. The workbench 1 is provided with a collection box 15, which is connected to the liquid inlet 14. The lifting assembly 2 and the workbench 1 are both equipped with a drainage pipe 16, which extends into the knife inlet 93.

[0062] After one end of the curing 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;

[0063] Before the rotating plate 62 descends, the bottom of the vulcanization bladder is first placed between the bottom abutment sleeve 31 and the bottom inner support assembly 3 to achieve pre-positioning of the vulcanization bladder. 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 expand. 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.

[0064] 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 compression 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. 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 abut against the top abutment sleeve 89 and the bottom abutment sleeve 31 respectively, and the bottom inner support assembly 3 and the top inner support assembly 7 strengthen the fixation of the vulcanization bladder. Then, the vulcanization bladder can be rotated for grinding.

[0065] 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, thereby allowing the two ends of the vulcanization bladder to keep rotating synchronously.

[0066] When the rotating plate 62 is pressed downward, the inner wall of the vulcanization bladder is simultaneously tightened. 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. The mechanical action of compression provides continuous internal support force to both ends of the vulcanization bladder, 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 the self-locking ability and the compression force ensure that the vulcanization bladder remains stable during grinding, and will not be offset or loosened due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding.

[0067] Furthermore, because the top and bottom internal support assemblies 7 and 3 are connected by a linkage mechanism and driven by the same first motor 61, the two ends of the curing bladder can rotate synchronously. This synchronization avoids the speed differences and torque imbalances that can occur with traditional independent motors at both ends, eliminating uneven polishing caused by inconsistent rotation at both ends. This not only improves polishing accuracy but also ensures a uniform treatment across the entire surface of the curing bladder, thereby enhancing the surface finish and appearance quality of the finished product.

[0068] 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.

[0069] In summary, the technical solution of the present application can significantly improve the polishing quality of the vulcanization bladder as a whole.

[0070] 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 and reduces equipment maintenance and failure risks. 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. Workers can easily remove the polished vulcanization capsules, and the operation is faster and more convenient.

[0071] Furthermore, during the grinding process, the upper and lower guards 91 and 92 are closed to form a relatively closed grinding environment. This, combined with the spraying of cutting fluid through the drain pipe 16, effectively prevents the splashing of powder and cutting fluid, protecting the processing environment and reducing the threat to worker health. While spraying, the cutting fluid, carrying the powder produced by grinding, flows along the outer surface of the vulcanizing bladder to the drainage guide surface 311, then along the bottom abutment sleeve 31 to the drainage chute 13, and finally through the liquid inlet 14 into the collection box 15. The collection box 15 can then be removed and the cutting fluid inside can be extracted from the powder through a recovery system for secondary use, achieving both environmental protection and resource recycling.

[0072] 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 bracket 35 is provided on the chassis 34. The mounting bracket 35 is connected to the linkage assembly 8. The chassis 34 is rotatably connected A first wheel disc 36 is provided with four first arcuate slots 361, each extending through the center of the first wheel disc 36. Four first guide posts 37 are slidably connected to the chassis 34. These first guide posts 37 are located at the bottom of the chassis 34 and are movable radially along the chassis 34. Each of the first guide posts 37 corresponds to each of the first arcuate slots 361 and is inserted into the corresponding first arcuate slot 361. The first guide posts 37 are connected to a bottom inner support block 38. The middle inner support assembly 4 is rotatably mounted on the chassis 34.

[0073] 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 posts 73. The second guide posts 73 are located at the bottom of the rotating plate 62 and can move radially along the rotating plate 62. The second guide posts 73 correspond one-to-one to the second arc grooves 72 and the second guide posts 73 are inserted into the corresponding second arc grooves 72. The second guide posts 73 are connected to the top inner support block 74, and the linkage assembly 8 is connected to the rotating plate 62.

[0074] 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 to 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. A first spiral guide groove 821 is formed on one end of the first rotating shaft 82 passing through the support plate 81. Two pin sleeves 83 are fixed to the top of the support plate 81.

[0075] like Figure 5 、 Figure 6 and Figure 7The second wheel 71 is coaxially connected to the 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 penetrated by a plurality of telescopic rods 87, and the telescopic rods 87 correspond to the adjusting springs 85 one by one. After the telescopic rods 87 pass through the corresponding adjusting springs 85, they are connected to the rotating plate 62. 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.

[0076] When the rotating plate 62 descends, the electromagnetic clutch 33 is activated to attract the rotating sleeve 32, thereby limiting the rotation of the chassis 34. Then, the adjusting sleeve 86 is inserted into the first rotating shaft 82. The first guide ball 861 applies a thrust to the first spiral guide groove 821, causing the first rotating shaft 82 to drive the first wheel 36 to rotate. During this process, the plurality of adjusting springs 85 press against the adjusting sleeve 86, 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.

[0077] The first rotating shaft 82 drives the first wheel 36 to rotate. Under the thrust of the first arc-shaped groove 361, the first guide post 37 moves, so that the bottom inner support block 38 tightens the inner wall of the curing bladder. At this time, the rotating plate 62 covers the curing bladder, the latch 88 is inserted into the pin sleeve 83, and the adjustment sleeve 86 is supported on the support plate 81.

[0078] Then, the rotating plate 62 continues to descend and compress the curing 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. The second guide ball 862 applies a thrust to the second spiral guide groove 841, causing the second rotating shaft 84 to drive the second wheel 71 to rotate. The thrust of the second arc groove 72 pushes the second guide post 73 to move, thereby causing the top inner support block 74 to tighten the inner wall of the curing bladder.

[0079] At this time, the rotating plate 62, the second disc 71, the adjusting sleeve 86, the support 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 support 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.

[0080] 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 curvature of the second arcuate groove 72 is designed to be smaller than that of the first arcuate groove 361. This allows the first wheel 36 to rotate one circle or more before tightening the vulcanization bladder, providing the rotating plate 62 with sufficient displacement to descend and cover the vulcanization bladder, and allows the second wheel 71 to rotate 90 degrees or less than 90 degrees before tightening the vulcanization bladder. This allows the top inner support block 74 to quickly move and tighten the vulcanization bladder even with the small displacement provided by the rotating plate 62 when it presses the vulcanization bladder, thereby ensuring that both the top and bottom ends of the vulcanization bladder can be tightened smoothly.

[0081] 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 equipped with a gear 44. A rack 45 is slidably connected to the mounting plate 41. The gear 44 is engaged with the rack 45. The rack 45 is rotatably connected to 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 edge 93, and the other clamping wheel 46 faces away from the inlet edge 93.

[0082] 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 facing the bottom of the support columns 42. The bottom of the support columns 42 is made of magnetic material. The rotating groove where 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.

[0083] During the grinding process, the electromagnet 51 is activated, and the electromagnet 51 attracts the support column 42, so that the support plate 81 and the mounting plate 41 do not rotate relative to the workbench 1. As a result, when the vulcanization bladder rotates, the pressing wheel 46 does not move, ensuring that the pressing wheel 46 is always in contact with the cutter 12, ensuring that the cutter 12 can evenly grind the surface of the vulcanization bladder.

[0084] The relatively arranged holding wheel 46 can ensure that the middle portion 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.

[0085] like Figure 1 and Figure 2 The lifting assembly 2 includes a lifting frame 21, which is slidably connected to a lifting plate 22. The lifting plate 22 is driven up and down by a servo drive unit 23. The servo drive unit 23 is mounted on the lifting frame 21 and comprises a drive system consisting of a lead screw, a motor, and a nut holder. The nut holder is fixed to the lifting plate 22. A first motor 61 is mounted within the lifting plate 22, an upper shield 91 is mounted on the bottom of the lifting plate 22, and a rotating plate 62 is rotatably connected to the lifting plate 22.

[0086] A liquid reservoir 24 is installed in both the lifting plate 22 and the workbench 1. The liquid reservoir 24 is used to store cutting fluid and is connected to the drain pipe 16. A water pump is installed in the liquid reservoir 24 to supply fluid to the drain pipe 16. An air pump 25 is also rotatably installed in the lifting plate 22. The air pump 25 is connected to the rotating plate 62 and the inflation pipe 63. An air inlet 221 is provided on the lifting plate 22 and communicates with an annular groove that forms a rotatable connection between the lifting plate 22 and the air pump 25. This ensures that cutting fluid can be supplied and the vulcanizing bladder can be smoothly inflated.

[0087] The working principle of the embodiment of the present application is as follows: 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;

[0088] 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.

[0089] 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 compression 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. 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. Then, the vulcanization bladder can be rotated for polishing.

[0090] 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 vulcanizing bladder can keep rotating synchronously by the drive of only the first motor 61.

[0091] When the rotating plate 62 is pressed downward, the inner wall of the vulcanization bladder is simultaneously tightened. 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. The mechanical action of compression provides continuous internal support force to both ends of the vulcanization bladder, 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 the self-locking ability and the compression force ensure that the vulcanization bladder remains stable during grinding, and will not be offset or loosened due to pressure fluctuations or vibrations, thereby ensuring the consistency of grinding.

[0092] Furthermore, because the top and bottom internal support assemblies 7 and 3 are connected by a linkage mechanism and driven by the same first motor 61, the two ends of the curing bladder can rotate synchronously. This synchronization avoids the speed differences and torque imbalances that can occur with traditional independent motors at both ends, eliminating uneven polishing caused by inconsistent rotation at both ends. This not only improves polishing accuracy but also ensures a uniform treatment across the entire surface of the curing bladder, thereby enhancing the surface finish and appearance quality of the finished product.

[0093] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic trimming and polishing device for a curing bladder, characterized by: The invention comprises a workbench (1) and a lifting assembly (2), wherein a bottom inner support assembly (3) is rotatably provided 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 the rotating plate (62) is fixed with a top inner support assembly (7), wherein an air inflating tube (63) is provided on the rotating plate (62), wherein the bottom inner support assembly (3) is further provided with a linkage assembly (8), wherein a cylinder (11) is provided 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 face of the vulcanization bladder, and the top inner support assembly (7) continues to descend to compress the vulcanization bladder, while the top inner support assembly (7) tightens the vulcanization bladder; A collecting box (15) is provided in the workbench (1), the lifting assembly (2) is connected to 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 edge (93) when closed, and the upper shield (91) and the lower shield (92) are both provided with a drain pipe (16) near the cutting edge (93), the drain pipe (16) can discharge cutting fluid, and the collecting box (15) can collect cutting fluid; The bottom inner support assembly (3) includes 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); The top inner support assembly (7) includes a second wheel disc (71), the second wheel disc (71) is rotatably connected to 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 to a plurality of top inner support blocks (74), the top inner support blocks (74) are connected to 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); The linkage assembly (8) includes a support plate (81), the support plate (81) is located between the first wheel disc (36) and the second wheel disc (71), 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 the first rotating shaft (82) passes through the end of the support plate (81) and 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 provided in the adjusting sleeve (86), 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 provided on the support plate (81), and a latch (88) is provided on the adjusting sleeve (86).

2. The automatic trimming and polishing device for a curing bladder according to claim 1, characterized in that: The middle inner support assembly (4) includes a mounting plate (41), the mounting plate (41) is connected to a support column (42), the support column (42) is rotatably connected to 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 engaged with the rack (45), and the rack (45) is rotatably connected to a retaining wheel (46); The fixing assembly (5) comprises an electromagnet (51), the electromagnet (51) is located in the workbench (1), the electromagnet (51) faces the support column (42), and the bottom of the support column (42) is made of magnetic material.

3. The automatic trimming and polishing device for a curing bladder according to claim 2, 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) is two, and 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 feed edge (93), and the other retaining wheel (46) faces away from the knife feed edge (93).

4. The automatic edge trimming and polishing 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 move up and down 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).

5. The automatic edge trimming and polishing device for a curing bladder according to claim 1, 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 inner 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) together, and a plurality of second return springs (923) are connected to the inner bottom wall of the lower sliding groove (922), and the lower sliding groove (922) is adapted and inserted with a lower clamping plate (924), and a plurality of the second return springs (923) are connected to the lower clamping plate (924) together, and when the lower clamping plate (924) and the upper clamping plate (914) are in contact, the first groove (911) and the second groove (921) together surround the feed edge (93).

6. The automatic edge trimming and polishing device for a curing bladder according to claim 5, characterized in that: A top abutting sleeve (89) is provided on the rotating plate (62), a bottom abutting sleeve (31) is rotatably connected to the workbench (1), a rotating sleeve (32) is connected to the chassis (34), the rotating sleeve (32) is rotatably connected to the workbench (1), a 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).

7. The automatic trimming and polishing device for a curing bladder according to claim 6, characterized in that: The top surface of the bottom abutting sleeve (31) is provided 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 provided on the workbench (1); the liquid inlet (14) is communicated with the drainage chute (13); and the collecting box (15) is communicated with the liquid inlet (14).

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