Tire carcass building uniformity tread press

Abstract

The utility model provides a kind of tire body forming uniformity tread press bonding device, belong to tread press bonding device technical field, the tire body forming uniformity tread press bonding device includes press bonding roller, support frame and pressure regulating mechanism, the both ends of press bonding roller are respectively fixed on the inner side wall of support frame by bearing seat, the outer circumferential surface of press bonding roller is provided with arc press bonding face, the curvature radius of arc press bonding face is compatible with the outer diameter curvature of tire body to be press bonded, the pressure regulating mechanism is arranged at the top of support frame, the pressure regulating mechanism includes adjusting screw rod and force transmission plate, the lower end of adjusting screw rod is threadedly connected with the center position of the upper surface of force transmission plate, solve the technical problem that uneven distribution of press bonding force in tire tread and tire body press bonding process in prior art leads to local adhesion strength deficiency or local deformation of tire body in tread and tire body combination site.

Description

Technical Field

[0001] This utility model belongs to the technical field of tire tread pressing devices, specifically, it relates to a tire tread pressing device for uniform tire body forming. Background Technology

[0002] In tire manufacturing, the pressing of the tread and carcass is a crucial step in the molding process, directly affecting the overall quality and performance of the tire. Traditional tread pressing operations mainly rely on manual operation of pressing tools or the use of simple mechanical pressing equipment. These methods have significant technical limitations. Manual pressing is difficult to precisely control due to the difficulty in controlling the force and angle, resulting in extremely uneven distribution of pressing force. Often, excessive pressure in some areas causes carcass deformation, while insufficient pressure in other areas leads to inadequate adhesion strength. Although simple mechanical pressing equipment can provide some pressing force, it lacks effective pressure adjustment mechanisms and precise positioning guides, making it impossible to adjust parameters specifically for tires of different specifications and thicknesses. The contact between the tire body surface and the tire carcass is often a rigid planar contact or a simple line contact, which cannot achieve a good fit with the curved surface of the tire carcass. This contact method is prone to local stress concentration during the pressing process, resulting in defects such as air bubbles or poor adhesion at the joint between the tire tread and the tire carcass. In addition, the surface of the pressing rollers of existing pressing equipment is usually a smooth cylindrical surface, which lacks the microstructure to promote uniform material flow and air release, further aggravating the problem of uneven pressing. As the tire manufacturing industry continues to increase its requirements for product quality, these traditional pressing methods and equipment can no longer meet the precision and consistency requirements of modern tire production. There is an urgent need to develop a new type of tire tread pressing device that can achieve uniform distribution of pressing force, flexible adjustment of pressing parameters, and simple and reliable operation. Utility Model Content

[0003] In view of this, the present invention provides a tire carcass forming uniform tread pressing device, which solves the technical problem in the prior art where uneven distribution of pressing force during the tire tread and carcass pressing process leads to insufficient local adhesion strength or local deformation of the carcass at the joint of the tread and carcass.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a tire carcass forming uniform tread pressing device, wherein:

[0006] The device includes a pressing roller, a support frame, and a pressure regulating mechanism. Both ends of the pressing roller are fixed to the inner wall of the support frame via bearing seats. The outer circumferential surface of the pressing roller has an arc-shaped pressing surface, the radius of curvature of which matches the outer diameter curvature of the tire carcass to be pressed. The pressure regulating mechanism is located at the top of the support frame and includes an adjusting screw and a force transmission plate. The lower end of the adjusting screw is threaded to the center of the upper surface of the force transmission plate. The lower surface of the force transmission plate is connected to the upper end face of the bearing seat of the pressing roller via multiple evenly distributed connecting rods. The bottom of the support frame has a positioning groove for accommodating and positioning the tire carcass. When the adjusting screw rotates, the force transmission plate drives the pressing roller to move vertically along the support frame, causing the arc-shaped pressing surface of the pressing roller to generate an adjustable pressing contact force with the surface of the tire carcass located in the positioning groove.

[0007] The technical effects of the tire carcass molding uniformity tread pressing device provided by this utility model are as follows: By setting a pressing roller with an arc-shaped pressing surface and matching its radius of curvature to the outer diameter curvature of the tire carcass, and combining it with a pressure adjustment mechanism to achieve adjustable vertical movement of the pressing roller, the pressing roller can generate uniformly distributed contact pressure with the tire carcass surface. This effectively ensures that the tread and carcass are subjected to uniform force during the pressing process, avoiding poor tread adhesion or carcass deformation caused by excessive or insufficient local pressure. At the same time, the threaded connection between the adjusting screw and the force transmission plate enables precise pressure adjustment, meeting the pressing requirements of tires of different specifications and significantly improving the uniformity and reliability of tread pressing.

[0008] Based on the above technical solution, the tire carcass forming uniformity tread pressing device of this utility model can be further improved as follows:

[0009] Wherein, the width of the arc-shaped pressing surface of the pressing roller along the axial direction is greater than 1.2 times the inner diameter width of the positioning groove.

[0010] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the axial width of the arc-shaped pressing surface of the pressing roller to be greater than 1.2 times the inner diameter of the positioning groove, it is ensured that the pressing roller can cover the entire width range of the tread and leave sufficient edge margin when in contact with the tire carcass. This prevents the occurrence of pressing blind spots or insufficient pressure in the edge area of ​​the tread due to insufficient width of the pressing roller, so that the entire tread area can obtain sufficient and uniform pressing force, effectively eliminating the adverse effects of edge effect on pressing quality, and further improving the overall uniformity and integrity of the tread and carcass bonding.

[0011] Furthermore, guide grooves are respectively provided on the inner walls of both sides of the support frame, and guide protrusions that cooperate with the guide grooves are provided on the outer side of the bearing seat. The guide protrusions slide along the channel direction of the guide grooves.

[0012] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting guide grooves on the inner wall of the support frame and setting guide protrusions that cooperate with them on the outer side of the bearing seat, a precise guiding mechanism is formed, which enables the pressing roller to move strictly along the predetermined vertical trajectory when driven by the pressure regulating mechanism, avoiding lateral deviation or tilting, ensuring that the arc-shaped pressing surface of the pressing roller always maintains the correct relative position and contact angle with the tire carcass surface, preventing uneven pressing or local stress concentration caused by movement trajectory deviation, thereby ensuring the stability and repeatability of the pressing process, and significantly improving the consistency and accuracy of tread pressing.

[0013] Furthermore, the force transmission plate has a rectangular plate structure, and through holes are respectively opened at the four corners of the force transmission plate. The upper end of the connecting rod passes through the through holes and is locked and fixed by a nut.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By designing the force transmission plate as a rectangular plate structure and opening through holes at the four corners, the connecting rods can be evenly distributed at the four corners of the force transmission plate, forming a stable four-point support force transmission structure. When the adjusting screw drives the force transmission plate to move, the force transmitted to the bearing seat of the pressing roller can be evenly distributed to the four connection points, avoiding deformation or uneven force distribution of the force transmission plate caused by single-point or double-point force, ensuring that the pressing roller is subjected to a balanced driving force throughout the entire axial length range, thereby making the pressing force applied by the pressing roller to the tire carcass more evenly distributed in the axial direction, effectively improving the overall uniformity of tread pressing.

[0015] Furthermore, multiple annular ridges are evenly distributed along the axial direction on the arc-shaped pressing surface of the pressing roller. The cross-section of each annular ridge is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

[0016] The beneficial effects of the above-mentioned improvement scheme are as follows: By uniformly distributing multiple annular ridges with trapezoidal cross-sections along the axial direction on the arc-shaped pressing surface of the pressing roller, and making the width of the upper base of the trapezoid smaller than the width of the lower base, a ridge side with a certain inclination angle is formed. During the pressing process, this trapezoidal ridge structure can exert a progressive squeezing effect on the tread material, causing the tread material to flow and diffuse evenly to both sides under the action of pressing force, effectively eliminating air bubbles and gaps that may exist between the tread and the tire body. At the same time, the stable bottom surface of the trapezoidal structure can provide sufficient support area to prevent the ridges from deforming or breaking under high pressure, significantly enhancing the density and bonding strength between the tread and the tire body.

[0017] Furthermore, an annular groove is formed between two adjacent annular ridges, and the depth of the annular groove is 1 / 2 to 2 / 3 of the height of the annular ridge.

[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By forming annular grooves with a depth of 1 / 2 to 2 / 3 of the height of the ridges between adjacent annular ridges, a surface microstructure with alternating ridges and grooves is constructed. During the pressing process, the ridges apply concentrated pressure to the tread, while the grooves provide buffer space for the flow and redistribution of the tread material, avoiding the extrusion or accumulation of the tread material due to excessive pressure. At the same time, the appropriate depth of the grooves can ensure sufficient material accommodation space without weakening the support strength of the ridges, making the stress distribution during the pressing process more reasonable and effectively improving the uniformity of tread pressing and material utilization efficiency.

[0019] Furthermore, the inner wall of the positioning groove is arc-shaped, and the radius of curvature of the arc of the positioning groove matches the radius of curvature of the inner diameter of the tire body to be pressed. A limiting flange is provided at the edge of the groove opening of the positioning groove.

[0020] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by designing the inner wall of the positioning groove as an arc shape and matching its radius of curvature with the radius of curvature of the inner diameter of the tire, and setting a limiting flange at the edge of the groove, the tire body can be accurately positioned and reliably fixed. The arc-shaped inner wall can form a large area of ​​contact with the inner surface of the tire body, ensuring that the tire body maintains a stable position and posture during the pressing process without shifting or rotating. The limiting flange prevents the tire body from tilting upward or detaching from the positioning groove when under pressure, thereby providing a stable working reference for the pressing roller, ensuring that the pressing force can be accurately transmitted to the joint between the tread and the tire body, and significantly improving the stability and controllability of the pressing process.

[0021] Furthermore, the upper end of the adjusting screw passes through the top plate of the support frame and extends to the outside of the support frame, and an operating handwheel is provided at the extended end of the adjusting screw.

[0022] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By passing the upper end of the adjusting screw through the top plate of the support frame and extending it to the outside to set an operating handwheel, a convenient manual adjustment mechanism is formed. The operator can directly control the rotation of the adjusting screw by rotating the handwheel, thereby accurately adjusting the position of the force transmission plate and the pressing roller as well as the magnitude of the pressing force. This external handwheel design makes the adjustment operation more intuitive and convenient. The operator can complete the pressure adjustment without touching the inside of the device, which not only improves the safety and convenience of operation, but also makes the adjustment of pressing parameters more flexible and quick. It can quickly adapt to the pressing needs of tire carcasses of different specifications and thicknesses, significantly improving the practicality and applicability of the device.

[0023] Furthermore, the pressing roller is made of hard alloy steel, the support frame is made of cast iron, and the force transmission plate is made of carbon steel.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by selecting hard alloy steel to make the pressing roller, it has high hardness and high wear resistance, enabling it to withstand long-term high-pressure contact without surface wear or deformation; by selecting cast iron to make the support frame, it has good rigidity and shock absorption, providing a stable support foundation for the entire device; and by selecting carbon steel plate to make the force transmission plate, it has sufficient strength and appropriate toughness, enabling it to maintain structural stability and prevent fatigue fracture during repeated stress. This reasonable material selection ensures that the performance of each component of the device matches its functional requirements, guaranteeing the overall strength and service life of the device while controlling manufacturing costs, achieving a good balance between economy and reliability.

[0025] Furthermore, the bearing housing is connected to both ends of the pressing roller via deep groove ball bearings. The inner ring of the deep groove ball bearing is tightly fitted onto the end journal of the pressing roller, and the outer ring of the deep groove ball bearing is fixed in the inner hole of the bearing housing. The bearing housing remains stationary when the pressing roller rotates around its own central axis.

[0026] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By using a deep groove ball bearing to connect the bearing housing and the pressing roller, and making the inner ring of the bearing tightly fitted on the journal at the end of the roller while the outer ring is fixed in the inner hole of the bearing housing, a precise rotating support structure is formed. This allows the pressing roller to rotate freely around its own central axis during the pressing process while the bearing housing remains stationary. This rotating support method allows the pressing roller to rotate synchronously with the movement of the tire surface when in contact with the tire carcass, converting sliding friction into rolling friction, significantly reducing frictional resistance and the generation of frictional heat, avoiding damage or adhesion of the tread material due to excessive friction, and ensuring that the pressing force can be applied evenly and continuously to the tire surface, thus significantly improving the pressing quality and efficiency.

[0027] Compared with existing technologies, the beneficial effects of the tire carcass forming uniform tread pressing device provided by this utility model are as follows: By setting an arc-shaped pressing roller with a radius of curvature adapted to the outer diameter curvature of the tire carcass, combined with a pressure adjustment mechanism consisting of an adjusting screw, a force transmission plate, and a connecting rod, and a precise guiding structure consisting of a guide groove on the inner wall of the support frame and a guide protrusion on the outer side of the bearing seat, a uniform and adjustable pressing force is applied to the tire carcass by the pressing roller. The microstructure of the alternating trapezoidal annular ridges and annular grooves on the arc-shaped pressing surface of the pressing roller further optimizes the stress distribution and material flow during the pressing process. The arc-shaped inner wall surface of the positioning groove and the limiting flange provide stable and reliable positioning for the tire carcass. Based on this design, the entire device, through reasonable structural design and material selection, enables the pressing force to be applied evenly to the joint between the tread and the tire carcass. This effectively eliminates adhesion defects and tire carcass deformation caused by excessive or insufficient local pressure, significantly improving the uniformity and consistency of tire forming. Simultaneously, the application of an external operating handwheel and a deep groove ball bearing rotary support structure makes the device more convenient and flexible to operate, reduces frictional resistance and energy loss, and extends the device's service life. Compared with existing technologies, this invention not only fundamentally solves the technical problem of uneven pressing but also has significant advantages in terms of structural simplicity, ease of operation, and manufacturing cost control, providing the tire manufacturing industry with an efficient and reliable tread pressing solution. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A front view of a tire carcass forming uniformity tread pressing device;

[0030] Figure 2 A side view of a tire carcass forming uniformity tread pressing device;

[0031] Figure 3 This is an example diagram of a tire carcass forming uniformity tread pressing device.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 10. Pressing roller; 20. Support frame; 21. Positioning groove; 30. Pressure adjustment mechanism; 31. Adjusting screw; 32. Force transmission plate; 33. Connecting rod. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0035] like Figures 1-3 As shown in the figure, this utility model provides an example of a tire carcass forming uniformity tread pressing device, wherein:

[0036] The system includes a pressing roller 10, a support frame 20, and a pressure adjusting mechanism 30. Both ends of the pressing roller 10 are fixed to the inner wall of the support frame 20 via bearing seats. The outer circumferential surface of the pressing roller 10 is provided with an arc-shaped pressing surface, the radius of curvature of which matches the outer diameter curvature of the tire carcass to be pressed. The pressure adjusting mechanism 30 is located at the top of the support frame 20 and includes an adjusting screw 31 and a force transmission plate 32. The lower end of the adjusting screw 31 is connected to the force transmission plate 32. The upper surface of the 2 is threaded at the center. The lower surface of the force transmission plate 32 is connected to the upper end face of the bearing seat of the pressing roller 10 through multiple evenly distributed connecting rods 33. The bottom of the support frame 20 is provided with a positioning groove 21 for accommodating and positioning the tire body. When the adjusting screw 31 rotates, the force transmission plate 32 drives the pressing roller 10 to move along the vertical direction of the support frame 20, so that the arc-shaped pressing surface of the pressing roller 10 generates an adjustable pressing contact force with the surface of the tire body located in the positioning groove 21.

[0037] The specific operation or usage method is as follows: First, place the tire carcass to be pressed into the positioning groove at the bottom of the support frame, ensuring that the inner surface of the tire carcass is tightly fitted against the arc-shaped inner wall of the positioning groove, and that the edge of the tire carcass abuts against the limiting flange for precise positioning. Then, cover the outer surface of the tire carcass with the pre-prepared tread material, ensuring that the relative position of the tread and the tire carcass is correct. Next, rotate the operating handwheel at the upper end of the adjusting screw. The rotation of the screw drives the force transmission plate downwards. The force transmission plate transmits force to the bearing seats of the pressing roller through the connecting rods at the four corners, causing the pressing roller to move downwards along the guide groove on the inner wall of the support frame. When the arc-shaped pressing surface of the pressing roller contacts the tire... During the surface pressing process, continue rotating the handwheel to increase the pressing force. The annular ridges on the surface of the pressing roller apply a uniform pressing force to the tread, making the tread material adhere tightly to the tire body. During the pressing process, the pressing roller rotates freely through the deep groove ball bearing. As the tire body or the operator rotates the tire body, the pressing roller gradually completes the pressing operation around the circumference of the tread. After pressing is completed, rotate the handwheel in the opposite direction to make the pressing roller return to the initial position through the force transmission plate and connecting rod. Then, remove the pressed tire semi-finished product for the next process. The whole operation is simple and smooth. The amount of rotation of the handwheel can precisely control the magnitude of the pressing force to adapt to the pressing requirements of different tire specifications.

[0038] In the above technical solution, the axial width of the arc-shaped pressing surface of the pressing roller 10 is greater than 1.2 times the inner diameter width of the positioning groove 21.

[0039] Furthermore, in the above technical solution, guide grooves are respectively provided on the inner walls of both sides of the support frame 20, and guide protrusions that cooperate with the guide grooves are provided on the outer side of the bearing seat. The guide protrusions slide along the channel direction of the guide grooves.

[0040] Furthermore, in the above technical solution, the force transmission plate 32 has a rectangular plate structure, and through holes are respectively opened at the four corners of the force transmission plate 32. The upper end of the connecting rod 33 passes through the through holes and is locked and fixed by a nut.

[0041] Furthermore, in the above technical solution, multiple annular ridges are evenly distributed along the axial direction on the arc-shaped pressing surface of the pressing roller 10. The cross-section of each annular ridge is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

[0042] Furthermore, in the above technical solution, an annular groove is formed between two adjacent annular ridges, and the depth of the annular groove is 1 / 2 to 2 / 3 of the height of the annular ridge.

[0043] Furthermore, in the above technical solution, the inner wall surface of the positioning groove 21 is arc-shaped, the radius of curvature of the arc of the positioning groove 21 matches the radius of curvature of the inner diameter of the tire body to be pressed, and a limiting flange is provided at the edge of the groove of the positioning groove 21.

[0044] Furthermore, in the above technical solution, the upper end of the adjusting screw 31 passes through the top plate of the support frame 20 and extends to the outside of the support frame 20, and the extended end of the adjusting screw 31 is provided with an operating handwheel.

[0045] Furthermore, in the above technical solution, the pressing roller 10 is made of hard alloy steel, the support frame 20 is made of cast iron, and the force transmission plate 32 is made of carbon steel plate.

[0046] Furthermore, in the above technical solution, the bearing housing is connected to both ends of the pressing roller 10 by a deep groove ball bearing. The inner ring of the deep groove ball bearing is tightly fitted on the end journal of the pressing roller, and the outer ring of the deep groove ball bearing is fixed in the inner hole of the bearing housing. When the pressing roller rotates around its own central axis, the bearing housing remains stationary.

[0047] Specific Embodiment 1: In this embodiment, the pressing roller is made of hard alloy steel through precision machining. The outer diameter of the roller is 280mm, the axial width of the arc-shaped pressing surface is 350mm, and the radius of curvature of the arc-shaped pressing surface is 450mm. It is suitable for pressing tire carcasses with an outer diameter of about 900mm. Nine annular ridges are evenly distributed along the axial direction on the arc-shaped pressing surface. The distance between adjacent ridges is 35mm. The cross-section of each annular ridge is trapezoidal, with an upper base width of 8mm, a lower base width of 15mm, and a ridge height of 4mm. The depth of the annular groove between adjacent ridges is 2.5mm, and the bottom of the groove has a rounded transition. The support frame is made of gray cast iron. The frame has an overall height of 850mm and an internal clearance width of 600mm. The guide grooves on both inner walls are 12mm deep and 20mm wide, with an effective vertical length of 300mm. The guide protrusions on the outer surfaces of the bearing seats at both ends of the pressing roller precisely fit with the guide grooves, with a clearance controlled within 0.1mm. The force transmission plate is made of 15mm thick carbon steel plate, cut into a 400mm x 500mm rectangle. Through holes with a diameter of 20mm are opened at the four corners, 50mm from the edge. The connecting rod is made of 18mm diameter round steel, 180mm long, and its upper end passes through the through hole in the force transmission plate and is locked with a nut. The end of the roller is connected to the upper end face of the bearing housing via threads. The adjusting screw adopts a trapezoidal thread structure with a screw diameter of 30mm and a pitch of 6mm. The lower end of the screw is connected to the threaded hole at the center of the upper surface of the force transmission plate. The upper end of the screw extends 150mm outward through the top plate of the support frame. A 200mm diameter disc-shaped operating handwheel is welded to the extended end. Six handles are evenly distributed around the circumference of the handwheel for easy gripping. The positioning groove is located at the bottom of the support frame, with a groove depth of 120mm, an inner wall arc radius of 400mm, and a limiting flange height of 25mm and a width of 30mm at the edge of the groove. Both ends of the pressing roller are connected to the bearing housing via deep groove ball bearings of model 6210. The inner ring of the bearing is fastened to the journal with a diameter of 50mm at the end of the roller with an interference fit. The outer ring of the bearing and the inner hole of the bearing housing are fitted with a clearance fit for easy installation. The bearing housing is made of cast steel and has an overall U-shaped structure. When in use, first place the tire carcass into the positioning groove for positioning, then cover the outer surface of the tire carcass with the tread material. Rotate the operating handwheel to rotate and lower the adjusting screw. Each rotation moves the force transmission plate down by 6mm. When the arc-shaped pressing surface of the pressing roller contacts the tire tread, continue to rotate the handwheel 3 to 5 times to make the pressing force reach the predetermined value. Then rotate the tire carcass or move the entire device to make the pressing roller roll in the circumferential direction of the tire tread to complete the full circle of pressing. After pressing is completed, rotate the handwheel in the opposite direction to reset the pressing roller.

[0048] Specific Embodiment 2: This Embodiment 2 is based on Embodiment 1. The number of annular ridges on the surface of the pressing roller is increased to 13, the spacing between adjacent ridges is reduced to 25mm, the upper base width of the trapezoidal cross-section of the ridge is adjusted to 6mm, the lower base width is adjusted to 12mm, the ridge height remains unchanged at 4mm, and the depth of the annular groove is increased to 3mm. This denser ridge distribution makes the microstructure of the pressing roller surface more refined, enabling a more uniform and fine distributed pressure to be applied to the tread during the pressing process, enhancing the guiding effect on the flow of tread material, and more effectively eliminating the contact between the tread and the tire carcass. The improvements include eliminating tiny air bubbles and gaps, increasing the thickness of the force transmission plate to 20mm, increasing the distance from the four corner through holes to the edge to 70mm, and increasing the diameter of the connecting rod to 22mm. These improvements enhance the rigidity and load-bearing capacity of the force transmission plate and connecting rod. Under the same pressing force, the flatness of the force transmission plate can be better maintained, reducing force distribution deviations caused by force transmission plate deformation. This allows the pressing force to be transmitted more evenly to the bearing seat of the pressing roller through the connecting rod, further improving the uniformity and stability of the entire pressing process. This makes it suitable for the production of high-performance tires with higher pressing quality requirements.

[0049] Specifically, the principle of this invention is as follows: Based on the principle of conformal contact and distributed uniform loading, the outer circumferential surface of the pressing roller is designed as an arc-shaped pressing surface that matches the curvature of the tire's outer diameter. This allows the pressing roller and the tire surface to form a large-area conformal contact rather than point or line contact. This conformal contact can evenly distribute the pressing force throughout the entire contact area, avoiding local stress concentration. The pressure adjustment mechanism converts the rotational motion of the adjusting screw into the linear motion of the force transmission plate, and then transmits the force to the bearing seat of the pressing roller through multiple evenly distributed connecting rods, achieving precise control of the pressing force. The guide groove on the inner wall of the support frame and the guide protrusion on the outer side of the bearing seat form a precise guide pair, constraining the pressing roller to move only in the vertical direction, ensuring the stability of the contact angle and position during the pressing process. The trapezoidal annular ridges on the surface of the pressing roller exert pressure on the tire tread material during pressing. The progressive extrusion process, with its sloping sides of the ridges guiding material flow to both sides and the grooves providing buffer space for material flow, achieves a dual effect of macroscopic uniform distribution of pressing force and microscopic stress regulation through this alternating ridge and groove microstructure. The arc-shaped inner wall of the positioning groove forms a precise positioning fit with the inner surface of the tire body, and the limiting flange prevents displacement of the tire body under pressure, providing a stable working reference for pressing. The application of deep groove ball bearings allows the pressing rollers to rotate freely during the pressing process, converting sliding friction into rolling friction, reducing frictional resistance and heat generation. These technical measures work synergistically from multiple aspects, including contact method, force transmission, motion guidance, surface microstructure, and support method, fundamentally changing the uneven force distribution and poor contact in traditional pressing methods. This achieves uniformity, controllability, and stability in the pressing process between the tread and the tire body, effectively solving the quality problems caused by uneven pressing.

Claims

1. A tire carcass forming uniformity tread pressing device, characterized in that: The device includes a pressing roller, a support frame, and a pressure regulating mechanism. Both ends of the pressing roller are fixed to the inner sidewalls of the support frame via bearing seats. The outer circumferential surface of the pressing roller has an arc-shaped pressing surface, the radius of curvature of which matches the outer diameter curvature of the tire body to be pressed. The pressure regulating mechanism is located at the top of the support frame and includes an adjusting screw and a force transmission plate. The lower end of the adjusting screw is threaded to the center of the upper surface of the force transmission plate. The lower surface of the force transmission plate is connected to the upper end face of the bearing seat of the pressing roller via multiple evenly distributed connecting rods. The bottom of the support frame has a positioning groove for accommodating and positioning the tire body. When the adjusting screw rotates, the force transmission plate drives the pressing roller to move vertically along the support frame.

2. The tire carcass forming uniformity tread pressing device according to claim 1, characterized in that, The axial width of the arc-shaped pressing surface of the pressing roller is greater than 1.2 times the inner diameter width of the positioning groove.

3. The tire carcass forming uniformity tread pressing device according to claim 2, characterized in that, The inner walls on both sides of the support frame are respectively provided with guide grooves, and the outer side of the bearing seat is provided with guide protrusions that cooperate with the guide grooves. The guide protrusions slide along the groove direction of the guide grooves.

4. The tire carcass forming uniformity tread pressing device according to claim 3, characterized in that, The force transmission plate has a rectangular plate structure, and through holes are opened at the four corners of the force transmission plate. The upper end of the connecting rod passes through the through holes and is locked and fixed by a nut.

5. The tire carcass forming uniformity tread pressing device according to claim 4, characterized in that, The pressing roller has multiple annular ridges evenly distributed along the axial direction on its arc-shaped pressing surface. The cross-section of each annular ridge is trapezoidal, and the width of the upper base of the trapezoid is smaller than the width of the lower base.

6. The tire carcass forming uniformity tread pressing device according to claim 5, characterized in that, An annular groove is formed between two adjacent annular ridges, and the depth of the annular groove is 1 / 2 to 2 / 3 of the height of the annular ridge.

7. The tire carcass forming uniformity tread pressing device according to claim 6, characterized in that, The inner wall of the positioning groove is arc-shaped, and the radius of curvature of the arc of the positioning groove matches the radius of curvature of the inner diameter of the tire body to be pressed. The edge of the positioning groove is provided with a limiting flange.

8. The tire carcass forming uniformity tread pressing device according to claim 7, characterized in that, The upper end of the adjusting screw passes through the top plate of the support frame and extends to the outside of the support frame, and an operating handwheel is provided at the extended end of the adjusting screw.

9. The tire carcass forming uniformity tread pressing device according to claim 8, characterized in that, The pressing roller is made of hard alloy steel, the support frame is made of cast iron, and the force transmission plate is made of carbon steel plate.

10. A tire carcass forming uniformity tread pressing device according to claim 9, characterized in that, The bearing housing is connected to both ends of the pressing roller via deep groove ball bearings. The inner ring of the deep groove ball bearing is tightly fitted onto the end journal of the pressing roller, and the outer ring of the deep groove ball bearing is fixed in the inner hole of the bearing housing. The bearing housing remains stationary when the pressing roller rotates around its own central axis.

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