Tire calender mechanism

Abstract

The application discloses a tire calendering mechanism and relates to the technical field of tire calendering, which comprises a rack, two calendering roller groups, a tensioning assembly, a tensioning degree regulating assembly and a bending degree regulating assembly. The tensioning assembly comprises a sliding block and a tensioning roller rotatably connected to the sliding block. The tensioning degree regulating assembly comprises a linear driving source and a pressure sensor fixedly connected to the power output end of the linear driving source. The pressure receiving end of the pressure sensor is fixedly connected to the sliding block. The linear driving source drives the tensioning assembly to slide to tension or slacken the rubber belt according to the pressure change of the pressure sensor, so that the rubber belt is restored to the standard tensioning degree. The bending degree regulating assembly is arranged between the two calendering roller groups and adjusts the speed ratio of the two calendering roller groups under the displacement of the power output end, so that the rubber belt is restored to the standard bending degree. The application improves the stability of the tire calendering mechanism in calendering the rubber belt, and the thickness of the output rubber belt is uniform and the quality is stable.

Description

Technical Field

[0001] This invention relates to the field of tire calendering technology, specifically to a tire calendering mechanism. Background Technology

[0002] Tire calendering is one of the key processes in tire manufacturing, mainly used for the coating and pressing of rubber compounds in components such as tire cords, treads, and sidewalls. Traditional calendering processes involve steps such as rubber compound mixing, preheating, calendering, and cooling. Its core equipment is the calender. In rubber calendering, multi-stage tandem calendering is usually used to achieve uniform thickness control and surface quality, such as three-roll and four-roll calenders.

[0003] Existing technology, such as the tire production cord calendering equipment disclosed in CN119036731A, uses a first calendering frame, a second calendering frame, a limiting side frame, a limiting base frame, and a calendering pad to perform adaptive calendering operations on both sides and the center of the cord during tire production. In actual use, the operator first puts the tire cord to be calendered into the second calendering frame, then through the first calendering frame, and finally through the collection operation. At this time, the first calendering frame and the second calendering frame have the same structure.

[0004] For example, the tire inner liner calendering device disclosed in announcement number CN222406812U first uses an adjusting motor to rotate two lifting screws according to the thickness of the tire inner liner. Because the threads of the two screws are opposite, they can move the adjusting kit on the right in opposite directions. The adjusting kit drives the adjusting slider to rise and fall. The adjusting slider slides in the adjusting groove and drives the mounting plate to rise and fall to adjust the distance between the upper and lower calendering rollers. It can be used for calendering inner liners of different thicknesses.

[0005] The aforementioned existing technologies enable more efficient calendering of tire cord fabric, meeting the subsequent requirements for the curved edges of the tire cord fabric. However, in multi-stage calendering, the rubber belt in the intermediate stage is susceptible to fluctuations in input, such as uneven feeding speed, temperature gradient changes, or mechanical transmission errors, leading to an imbalance in the consumption rate. If the rubber consumption in a certain calendering stage is too fast, it will cause insufficient material supply to subsequent processes, resulting in sudden changes in tensile stress. If the consumption is too slow, it will cause the rubber belt to accumulate at the roll gap, commonly known as "rubber piling," resulting in wrinkles or localized vulcanization precursors. These imbalances disrupt the dynamic balance of the calendering system, ultimately affecting the thickness consistency and physical properties of the output rubber belt. Summary of the Invention

[0006] The purpose of this invention is to provide a tire calendering mechanism to solve the problem in the prior art where an imbalance in the feeding speed disrupts the dynamic balance of the calendering system, ultimately affecting the thickness consistency and physical properties of the output rubber belt.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tire calendering mechanism, comprising a frame and two calendering roller groups mounted on the frame for sequentially calendering rubber strips, further comprising: a tensioning assembly, comprising a slider slidably connected to the frame and a tensioning roller rotatably connected to the slider; a tension adjustment assembly, comprising a linear drive source and a pressure sensor fixedly connected to the power output end of the linear drive source, the pressure receiving end of the pressure sensor being fixedly connected to the slider, the linear drive source driving the tensioning assembly to slide according to the pressure change received by the pressure sensor to tension or loosen the rubber strip between the two calendering roller groups, so that the rubber strip returns to the standard tension; and a curvature adjustment assembly, which is driven between the two calendering roller groups and adjusts the speed ratio of the two calendering roller groups under the displacement of the power output end, so that the rubber strip returns to the standard curvature.

[0008] Furthermore, each calendering roll group includes a driving roll and a driven roll that cooperate with each other, and a curvature adjustment component is used to adjust the speed ratio between the driving rolls of the two calendering roll groups.

[0009] Furthermore, the curvature adjustment component includes a transmission wheel and two conical wheels with identical structures, parallel axes, and opposite conical ends. Each of the two conical wheels is connected to a power roller, and the transmission wheel simultaneously drives and abuts against the two conical wheels. The linear drive source can drive the transmission wheel to move axially.

[0010] Furthermore, the shaft of the transmission wheel is fixedly connected to the power output end of the linear drive source via a connecting rod.

[0011] Furthermore, a drive motor is installed on the frame, and the drive motor is connected to the power roller near the output end of the rubber belt via a gearbox.

[0012] Furthermore, the power rollers of both calendering roller groups are rotatably connected to the frame. The driven roller near the output end of the rubber belt is vertically slidably connected to the frame via a first movable rod, and the other driven roller is horizontally slidably connected to the frame via a second movable rod. The distance between the two driven rollers and the corresponding power rollers is adjusted by sliding the first and second movable rods on the frame.

[0013] Furthermore, the frame is provided with a guide rod inclined at 45° to the horizontal plane, and a sliding column is slidably installed on the guide rod. The sliding column is slidably connected to the first movable rod and the second movable rod. An adjusting screw is threaded on the guide rod along its length direction, and the end of the adjusting screw is rotatably connected to the sliding column.

[0014] Furthermore, the pressure sensor is a piezoresistive pressure sensor or a ceramic pressure sensor.

[0015] Furthermore, the linear drive source is an electric actuator or a linear motor.

[0016] Furthermore, both the linear drive source and the pressure sensor are communicatively connected to a controller.

[0017] In the above technical solution, the present invention provides a tire calendering mechanism. When the rubber belt buffer between two sets of calendering rollers increases or decreases, the pressure applied by the rubber belt to the tensioning roller decreases or increases. The pressure sensor signal changes, which in turn feeds back and controls the extension or shortening of the electric push rod. This compensates for the rubber consumption that may be too fast or too slow due to unstable input, avoiding stretching deformation caused by excessively fast rubber belt consumption or wrinkles caused by excessively slow rubber accumulation. Simultaneously, the bending degree adjustment component and the tensioning component are linked in real time to adjust the speed of the power roller near the input end of the rubber belt, compensating for the instability of the input and restoring the rubber belt to the accumulation amount when it is in a stable state. This further enhances the stability of the calendered rubber belt of the tire calendering mechanism, resulting in a uniform thickness, no wrinkles, and stable quality of the output rubber belt. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 An enlarged schematic diagram of point A in the middle;

[0021] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0022] Figure 4 For the present invention Figure 3 An enlarged diagram of point B in the middle;

[0023] Figure 5 This is a schematic diagram of the pitch adjusting screw of the present invention;

[0024] Figure 6 This is a schematic diagram of the driving component of the present invention;

[0025] Figure 7 This is a schematic diagram of the driven roller adjustment structure of the present invention;

[0026] Figure 8This is a schematic diagram of the tension control component of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Frame; 11. Drive motor; 12. Gearbox; 2. Calendering roll assembly; 21. Power roll; 22. Driven roll; 3. Tensioning assembly; 31. Tensioning roll; 32. Slider; 4. Tension adjustment assembly; 41. Electric push rod; 42. Pressure sensor; 5. Bending adjustment assembly; 51. First conical wheel; 52. Second conical wheel; 53. Shaft; 54. Transmission wheel; 55. First bevel gear; 56. Second bevel gear; 57. Transmission assembly; 58. Third bevel gear; 59. Fourth bevel gear; 6. Connecting rod; 7. First movable rod; 71. Second movable rod; 8. Drive component; 81. Guide rod; 82. Sliding column; 83. Adjusting screw; 84. Hydraulic cylinder. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Please see Figures 1-8 This invention provides a tire calendering mechanism, including a frame 1, two calendering roller groups 2, a tensioning component 3, a tension adjustment component 4, and a curvature adjustment component 5. The two calendering roller groups 2 are both mounted on the frame 1 and are staggered in both the vertical and horizontal directions. The two calendering roller groups 2 are used to calender a rubber strip sequentially. The tensioning component 3 includes a slider 32 and a tensioning roller 31. The slider 32 is slidably connected to the frame 1, and the tensioning roller 31 is rotatably connected to the slider 32. The tensioning roller 31 rolls against the rubber strip between the two calendering roller groups 2, applying a certain tension force to the rubber strip, thereby bending the rubber strip into an arc. The tension of the rubber strip between the two calendering roller groups 2 during normal and stable calendering is the standard tension, and the corresponding curvature is the standard curvature. Both the standard tension and standard curvature are preset values.

[0031] Tension control component 4 is used to correct the tension of the rubber belt between the two calendering roll groups 2 to the target tension. Tension control component 4 includes a linear drive source and a pressure sensor 42, both of which are communicatively connected to the controller. The linear drive source is mounted on the frame 1, and the pressure sensor 42 is fixedly connected to the power output end of the linear drive source. The pressure-receiving end of the pressure sensor 42 is fixedly connected to the slider 32. When the rubber belt between the two calendering roll groups 2 is at the standard tension, the pressure value received by the pressure sensor 42 is the standard pressure value. The pressure sensor 42 is a piezoresistive pressure sensor or a ceramic pressure sensor, and the linear drive source is an electric actuator 41 or a linear motor, or other components capable of outputting linear power.

[0032] When the buffer amount of the rubber belt between the two sets of calendering rolls 2 increases, the pressure of the rubber belt acting on the pressure sensor 42 will decrease accordingly. The linear drive source drives the tensioning component 3 to slide closer to the rubber belt to further tighten the rubber belt according to the change in pressure of the pressure sensor 42 being lower than the standard pressure value, until the pressure value of the pressure sensor 42 returns to the standard pressure value, and the rubber belt also returns to the standard tension. When the buffer amount of the rubber belt between the two sets of calendering rolls 2 decreases, the pressure of the rubber belt acting on the pressure sensor 42 will increase accordingly. The linear drive source drives the tensioning component 3 to slide away from the rubber belt according to the change in pressure of the pressure sensor 42 being higher than the standard pressure value to loosen the rubber belt between the two sets of calendering rolls 2, until the pressure value of the pressure sensor 42 returns to the standard pressure value, and the rubber belt also returns to the standard tension.

[0033] Although the tension of the rubber belt between the two calendering roll groups 2 was adjusted and restored by the tension adjustment component 4, the curvature of the rubber belt changed. If this increase or decrease in curvature is not corrected, it will accumulate over time, causing the rubber belt to become excessively bent or straightened, exceeding the range that the tension adjustment component 4 can control. Therefore, a curvature adjustment component 5 was designed to correct the curvature of the rubber belt between the two calendering roll groups 2 to the target curvature.

[0034] The bending degree adjustment component 5 is driven between the two calendering roller groups 2. Specifically, it adjusts the speed ratio of the two calendering roller groups 2 under the drive of displacement at the power output end, so that the rubber belt is restored to the standard bending degree. When the curvature of the rubber strip between the two calender roll groups 2 increases, the curvature control component 5 reduces the rotational speed of the calender roll group 2 at the input end of the rubber strip, thereby slowing down the amount of rubber passing through the calender roll group 2 at the input end. The curvature of the rubber strip between the two calender roll groups 2 gradually decreases to the standard curvature. At this time, the curvature control component 5 resumes operation and no longer reduces the rotational speed of the calender roll group 2 at the input end, and the rotational speeds of the two calender roll groups 2 are synchronized. When the curvature of the rubber strip between the two calender roll groups 2 decreases, the curvature control component 5 increases the rotational speed of the calender roll group 2 at the input end of the rubber strip, thereby increasing the amount of rubber passing through the calender roll group 2 at the input end. The curvature of the rubber strip between the two calender roll groups 2 gradually increases to the standard curvature. At this time, the curvature control component 5 resumes operation and no longer increases the rotational speed of the calender roll group 2 at the input end, and the rotational speeds of the two calender roll groups 2 are synchronized.

[0035] As a more specific technical solution, each calendering roll group 2 includes a driving roll 21 and a driven roll 22. The driving roll 21 and the driven roll 22 are parallel to each other and cooperate with each other. The rubber belt passes through the gap between the corresponding driving roll 21 and driven roll 22 for calendering. The driving rolls 21 of both calendering roll groups 2 are rotatably connected to the frame 1. The frame 1 is equipped with a drive motor 11. The drive motor 11 is connected to the driving roll 21 near the output end of the rubber belt through a gearbox 12. That is, the motor drives the driving roll 21 at the output end to rotate, and the driving rolls 21 of the two calendering roll groups 2 are connected by transmission.

[0036] For the driven rollers 22 of the two calendering roller groups 2, the driven roller 22 near the output end of the rubber belt is rotatably connected to a horizontal first movable rod 7, which is vertically slidably mounted on the frame 1. The other driven roller 22 is rotatably mounted on a vertical second movable rod 71, which is horizontally slidably mounted on the frame 1. The frame 1 is also provided with a driving component 8, which includes a guide rod 81. The guide rod 81 has a guide groove at a 45° angle to the horizontal plane. A sliding column 82 is slidably connected in the guide groove. The first movable rod 7 and the second movable rod 71 have sliding grooves, and the sliding column 82 slides through the sliding grooves on the first movable rod 7 and the second movable rod 71 simultaneously. By driving the sliding column 82 to slide along the guide groove, the first movable rod 7 and the second movable rod 71 can drive the two driven rollers 22 to move synchronously closer to or away from the corresponding power roller 21, thereby synchronously adjusting the distance between the power roller 21 and the driven roller 22 of the two sets of calendering roller groups 2, which can adapt to calendering rubber strips of different thicknesses.

[0037] For driving the slide column 82, an adjusting screw 83 is threadedly installed on the guide rod 81 along its length direction. The length direction of the adjusting screw 83 is consistent with the length direction of the guide groove. The end of the adjusting screw 83 extends into the guide groove and is rotatably connected to the slide column 82. By turning the adjusting screw 83, the slide column 82 can be driven to slide along the guide groove. After stopping the turning of the adjusting screw 83, the adjusting screw 83 and the guide rod 81 are self-locked by the thread, thereby locking the slide column 82 and fixing the distance between the power roller 21 and the driven roller 22 of the two sets of calendering roller groups 2.

[0038] In another embodiment, the adjusting screw 83 can be replaced by a hydraulic cylinder 84 or a pneumatic cylinder. The seat of the hydraulic cylinder 84 is fixedly installed on the frame 1 or the guide rod 81. The open end of the piston rod of the hydraulic cylinder 84 is connected to the slide column 82. The extension and retraction of the piston rod can drive the slide column 82 to move along the guide groove, thereby adjusting the distance between the driven roller 22 and the corresponding power roller 21. The piston rod also has a self-locking function when it stops moving.

[0039] The curvature adjustment component 5 is used to adjust the rotational speed of the power roller 21 at the input end of the rubber belt, thereby adjusting the speed ratio between the power rollers 21 of the two calendering roller groups 2. The curvature adjustment component 5 includes a transmission wheel 54 and two conical wheels with identical structures, parallel axes, and opposite conical ends. The two conical wheels are rotatably connected to the frame 1, and each conical wheel is driven by one power roller 21. The transmission wheel 54 simultaneously drives and abuts against both conical wheels and is axially movable. The two conical wheels and the transmission wheel 54 form a stepless adjustment mechanism. By moving the transmission wheel 54 axially, the transmission ratio between the two conical wheels can be changed, thereby changing the speed ratio between the two power rollers 21. Since the two power rollers 21 are driven by the two conical wheels in a one-to-one correspondence, adjusting the speed ratio between the two power rollers 21 actually requires adjusting the speed ratio between the two conical wheels. First, the two conical wheels can only rotate on their own axes. Since their axes are parallel and their cones face opposite directions, the closest generatrices between them are parallel lines. The transmission wheel 54 is positioned between these two parallel lines, with its axis parallel to and centered on them. The transmission wheel 54 simultaneously contacts both conical wheels. Due to pressure, the contact surfaces undergo elastic deformation, resulting in surface contact. Therefore, as the transmission wheel 54 moves axially, it maintains contact with both conical wheels, thus continuously transmitting power between them. The axial movement of the transmission wheel 54 changes its contact position with the two conical wheels. Different contact positions correspond to different linear velocities of the conical wheels, thereby altering the speed ratio between the two conical wheels.

[0040] The logic and power for the axial movement of the transmission wheel 54 are provided by a linear drive source. That is, the linear drive source drives the transmission wheel 54 to move axially. The transmission wheel 54 is rotatably connected to its shaft 53. It is best to add a sliding structure between the shaft 53 and the frame 1 to increase the stability of the axial displacement of the transmission wheel 54. The shaft 53 is fixedly connected to the power output end of the linear drive source through a connecting rod 6. Therefore, when the power output end of the linear drive source moves, it will simultaneously drive the tension roller 31 and the transmission wheel 54 to move.

[0041] When the rubber belt between the two calendering roll groups 2 is in a balanced state of normal and stable calendering, the input and output of the rubber belt between the two calendering roll groups 2 are balanced, the rubber belt is at standard tension and standard curvature, the pressure sensor 42 receives the standard pressure value, the transmission wheel 54 transmits power between the two conical wheels in a 1:1 ratio, the rotation speed of the two calendering roll groups 2 is consistent, and the calendering operation is carried out smoothly.

[0042] When the buffer amount of rubber belt between the two calendering roll groups 2 increases, the pressure of the rubber belt acting on the pressure sensor 42 will decrease accordingly. On the one hand, based on the change in pressure received by the pressure sensor 42 being lower than the standard pressure value, the linear drive source drives the tensioning component 3 to slide closer to the rubber belt through the power output end to further tension the rubber belt. The pressure received by the pressure sensor 42 increases, moving closer to the standard pressure value, and the rubber belt also moves closer to the standard tension. On the other hand, while the power output end of the linear drive source drives the tensioning component 3 to slide closer to the rubber belt, the power output end of the linear drive source also simultaneously drives the transmission wheel 54 to move axially through the connecting rod 6 and the shaft 53, reducing the transmission ratio between the two conical wheels. This reduces the speed of the power roller 21 at the rubber belt input end, and the speed difference between the two calendering roll groups 2 causes the "stock" rubber belt between them to be consumed more quickly, increasing the curvature of the rubber belt. As the "stock" rubber belt is consumed, the pressure of the rubber belt on the tension roller 31 and pressure sensor 42 rapidly increases to the standard pressure value, and the curvature of the rubber belt continues to decrease, approaching the standard tension. However, at this time, the transmission ratio of the transmission wheel 54 between the two conical wheels is still less than 1, and the rotation speed of the calendering roller group 2 at the input end is still less than that at the output end. As a result, the rubber belt between the two calendering roller groups 2 continues to be consumed, and the pressure of the rubber belt on the pressure sensor 42 will exceed the standard pressure value. The linear drive source drives the tensioning component 3 to move away from the rubber belt to loosen it. Thus, under the joint control of the tension control component 4 and the curvature control component 5, the rubber belt recovers to the standard curvature as it continuously approaches the standard tension. The transmission ratio between the two conical wheels reaches 1, and finally the rubber belt returns to the balance state of the standard tension and standard curvature.

[0043] When the rubber belt buffer between the two calendering roll groups 2 decreases, the pressure of the rubber belt acting on the pressure sensor 42 increases accordingly. On one hand, based on the change in pressure received by the pressure sensor 42 being higher than the standard pressure value, the linear drive source drives the tensioning component 3 to slide away from the rubber belt through the power output end to loosen the rubber belt. The pressure received by the pressure sensor 42 decreases and approaches the standard pressure value, and the rubber belt also approaches the standard tension. On the other hand, while the power output end of the linear drive source drives the tensioning component 3 to slide away from the rubber belt, the power output end of the linear drive source also simultaneously drives the transmission wheel 54 to move in the opposite direction through the connecting rod 6 and the shaft 53, increasing the transmission ratio between the two conical wheels. This increases the rotational speed of the power roller 21 at the rubber belt input end. The speed difference between the two calendering roll groups 2 slows down the consumption of the "stock" rubber belt between them, causing the curvature of the rubber belt to gradually increase. As the rubber belt accumulates, the pressure on the tension roller 31 and pressure sensor 42 rapidly decreases to the standard pressure value, and the curvature of the rubber belt continues to increase, approaching the standard tension. However, at this time, the transmission ratio between the two conical rollers of the transmission wheel 54 is still greater than 1, and the rotation speed of the calender roller group 2 at the input end is still greater than that at the output end. This causes the rubber belt between the two calender roller groups 2 to continue to accumulate, and the pressure on the pressure sensor 42 will be lower than the standard pressure value. The linear drive source drives the tensioning component 3 to move closer to the rubber belt to further tension it. Thus, under the joint control of the tension control component 4 and the curvature control component 5, the rubber belt recovers to the standard curvature as it continuously approaches the standard tension. The transmission ratio between the two conical rollers reaches 1, and finally the rubber belt returns to the balance state of the standard tension and standard curvature.

[0044] It is worth mentioning that the rubber belt passes around the tension roller 31, and the tension roller 31 is in contact with the rubber belt. When the amount of "stock" rubber belt increases or decreases, the pressure sensor 42 adjusts the extension and retraction of the electric push rod 41 in real time, so that the tension roller 31 always keeps the rubber belt taut, avoiding wrinkles in the rubber belt in the middle state. The displacement of the tension roller 31 is synchronized with the axial displacement of the transmission wheel 54. That is, the tension control component 4 and the curvature control component 5 work together to "correct" the disruption to the calendering balance caused by the fluctuation of the rubber belt output in real time, so as to ensure the stable operation of the calendering mechanism.

[0045] Specifically, the transmission connection structure between the two conical wheels and the corresponding power roller 21 is as follows: the conical wheel closer to the output end of the rubber belt is the first conical wheel 51, and the other (the conical wheel closer to the input end of the rubber belt) is the second conical wheel 52. A first bevel gear 55 is coaxially fixedly connected to the power roller 21 at the output end of the rubber belt, and a second bevel gear 56 is coaxially fixedly connected to the first conical wheel 51. The first bevel gear 55 and the second bevel gear 56 mesh, thereby transmitting power from the power roller 21 at the output end of the rubber belt to the first conical wheel 51. A third bevel gear 58 is rotatably connected to the frame 1, and a fourth bevel gear 59 is coaxially fixedly connected to the power roller 21 at the input end of the rubber belt. The third bevel gear 58 and the fourth bevel gear 59 mesh. The transmission assembly 57 between the second conical wheel 52 and the third bevel gear 58 is a belt assembly or a chain assembly, thereby transmitting power from the second conical wheel 52 to the power roller 21 at the input end of the rubber belt.

[0046] When the transmission assembly 57 uses a belt assembly, the belt assembly includes a first pulley, a second pulley, and a transmission belt. The first pulley is coaxially and fixedly connected to the second conical pulley 52, and the second pulley is coaxially and fixedly connected to the third bevel gear 58. The transmission belt is sleeved between the first pulley and the second pulley. The rotational power of the second conical pulley 52 is transmitted sequentially through the first pulley, the transmission belt, and the second pulley to the third bevel gear 58. The third bevel gear 58 then transmits the power to the power roller 21 at the input end of the rubber belt through the fourth bevel gear 59.

[0047] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tire calender mechanism comprising a frame (1) and two calender roller sets (2) arranged on the frame (1) for sequentially calendering a rubber belt, characterized in that, Also include: The tensioning assembly (3) comprises a sliding block (32) slidingly connected to the rack (1) and a tensioning roller (31) rotatably connected to the sliding block (32); The tensioning degree control assembly (4) comprises a linear drive source and a pressure sensor (42) fixedly connected to the power output end of the linear drive source, the pressure receiving end of the pressure sensor (42) is fixedly connected with the sliding block (32), and the linear drive source drives the tensioning assembly (3) to slide to tension or slacken the rubber belt between the two calender roller groups (2) according to the pressure change of the pressure sensor (42), so that the rubber belt returns to the standard tensioning degree; The bending degree control assembly (5) is drivingly arranged between the two calender roller groups (2) and adjusts the speed ratio of the two calender roller groups (2) under the displacement of the power output end, so that the rubber belt returns to the standard bending degree; Each of the calender roller groups (2) comprises a driving roller (21) and a driven roller (22) cooperating with each other, and the bending degree control assembly (5) is used for adjusting the speed ratio between the driving rollers (21) of the two calender roller groups (2); the bending degree control assembly (5) comprises a transmission wheel (54) and two taper wheels which are consistent in structure, have parallel axes and have opposite taper ends, the two taper wheels are drivingly connected with one driving roller (21) respectively, the transmission wheel (54) simultaneously drivingly abuts against the two taper wheels, and the shaft (53) of the transmission wheel (54) is fixedly connected with the power output end of the linear drive source through the connecting rod (6), so that the linear drive source can drive the transmission wheel (54) to move along the axial direction.

2. The tire calender mechanism of claim 1 wherein, The rack (1) is provided with a driving motor (11), and the driving motor (11) is drivingly connected with the driving roller (21) near the output end of the rubber belt through a transmission (12).

3. The tire calender mechanism of claim 1 wherein, The driving rollers (21) of the two calender roller groups (2) are rotatably connected with the rack (1), the driven roller (22) near the output end of the rubber belt is vertically slidingly connected with the rack (1) through a first movable rod (7), and the other driven roller (22) is horizontally slidingly connected with the rack (1) through a second movable rod (71), and the distance between the two driven rollers (22) and the corresponding driving rollers (21) is adjusted by sliding the first movable rod (7) and the second movable rod (71) on the rack (1).

4. The tire calender mechanism of claim 3, wherein, The rack (1) is provided with a guide rod (81) inclined at an angle of 45° with the horizontal plane, a sliding column (82) is slidingly installed on the guide rod (81), the sliding column (82) is slidingly connected with the first movable rod (7) and the second movable rod (71), a pitch adjusting screw (83) is threadedly installed on the guide rod (81) in the length direction, and the end of the pitch adjusting screw (83) is rotatably connected with the sliding column (82).

5. The tire calender mechanism of claim 3 wherein, The pressure sensor (42) is a piezoresistive pressure sensor or a ceramic pressure sensor.

6. The tire calender mechanism of claim 1 wherein, The linear drive source is an electric push rod (41) or a linear motor.

7. The tire calender mechanism of claim 1 wherein, The linear drive source and the pressure sensor (42) are in communication connection with a controller.

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