A method of tyre tread winding
By using a tire tread winding method, which utilizes a small-diameter extruder and a belt drum to wind rubber strips, the problems of unstable tread dimensions and low joint strength are solved, achieving efficient and low-energy tire production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIUMSUN RUBBER TIRE WEIHAI
- Filing Date
- 2026-05-09
- Publication Date
- 2026-06-02
AI Technical Summary
In traditional tire manufacturing methods, the tread dimensions are unstable, which can easily lead to low strength at the joints, serious waste of rubber, and high costs and low efficiency when changing specifications.
The tire tread winding method is adopted, in which rubber strips are wound on the molding machine through a small-diameter extruder, combined with belt drum and pressing device to achieve multiple winding molding. Multiple belt drums are used to adjust the equipment parameters to meet different specification requirements.
Improve production efficiency and flexibility, reduce rubber waste, enhance product performance, reduce energy consumption, avoid joint problems, and ensure a tight fit between the tread and the tire blank.
Smart Images
Figure CN122125935A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tire manufacturing technology, and in particular relates to a tire tread winding method. Background Technology
[0002] In traditional tire manufacturing methods, the tread is extruded as a single sheet using an extruder. High-performance tires, on the other hand, are extruded using compound extruders to create three- or five-component treads. In these methods, the same rubber compound is used in all parts of the tire, resulting in a lack of performance distribution. Compound extrusion, using multiple rubber compounds, allows for tailored tread configurations to meet specific tire performance requirements. Both methods share common drawbacks: inconsistent dimensions, especially at the beginning and end of the tread where the extruded dimensions are prone to fluctuation, leading to rubber waste and performance instability; the presence of tread joints, where strength is low and separation is likely under high loads and sudden braking; and the need for new die plates for each tire size, resulting in high costs and low efficiency. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a tire tread winding method that improves production efficiency and flexibility, enhances product performance, and at the same time improves production efficiency and reduces energy consumption.
[0004] To solve the above-mentioned technical problems, the present invention provides a tire tread winding method, characterized by the following steps: Step 1, moving the remaining shaped tire blanks (excluding the tread) to the forming machine; Step 2, selecting a suitable forming drum, determining the drum's expansion radius and the tire's cross-sectional width; Step 3, installing corresponding tiles on the forming drum; Step 4, installing the belt drum; Step 5, the forming machine's belt drum identifies the center of the tire blank and locks the steel wire rings of the tire blank to prevent the tire blank from moving; Step 6, the belt drum expands, supporting the tire blank; tires with belt strips are first moved to the belt strip contact area for winding, while tires without belt strips are directly moved to the tread winding station for winding; Step 7, adding an extruder to the forming machine to extrude the tread rubber. Step 8: Ensure the forming machine can still rotate at the tread winding point. After the rubber strip is attached to the semi-finished tire carcass, the tread is formed by rotating the rubber strip and extruding it through the extruder. Step 9: Add a rubber strip pressing device to ensure the rubber strip adheres to the tire carcass. Step 10: Add a bending angle to the rubber strip or a rotating device for the rubber strip extruder head and pressing device to ensure the tread rubber can wrap around the entire tread. Adjust the angle change and back-and-forth movement of the rubber strip to ensure the rubber strip can be pressed against the tread according to the tread curvature; or control the extruder head and pressing device to move in an arc shape, and move the rubber strip back and forth to achieve multi-directional tread rubber winding.
[0005] Furthermore, it includes a pressing device for pressing the rubber strip, the pressing device including rollers capable of contacting the tire blank.
[0006] Furthermore, the rollers are provided in two sets, both sets of rollers are capable of moving relative to the tire blank and can also move axially relative to the tire blank. Each roller is rotatably connected to a support frame, the support frame is connected to a movable bracket, the movable bracket is connected to a drive cylinder, and the two drive cylinders move in opposite directions.
[0007] Furthermore, one end of the support frame is rotatably connected to the roller, the middle part of the support frame is hinged to the movable bracket, and the other end of the support frame is provided with a sliding plate that restricts its axial movement relative to the tire blank. The sliding plate is slidably connected to the pressing base and the sliding plate is slidably connected to the movable bracket.
[0008] Furthermore, a transition slider is provided between the movable support and the sliding plate. The transition slider is fixed to the movable support. A vertically penetrating sliding groove is provided on the transition slider. A sliding rod is provided in the sliding groove and slides relative to it. The sliding rod is connected to the sliding plate.
[0009] Furthermore, a limiting block is provided between the support frame and the sliding plate. One end of the limiting block is connected to the sliding plate, and the other end of the limiting block is slidably connected to the support frame. The other end of the limiting block is provided with a sliding shaft that slides relative to the support frame. The sliding shaft is fitted inside the support frame. An clearance groove is provided on the support frame, and the sliding groove is located inside the clearance groove. The size of the clearance groove is larger than the shaft diameter of the sliding shaft.
[0010] This invention, through the above steps, improves production efficiency and flexibility: different specifications can be wound using the same die; only equipment parameters and belt drum cover plates need to be changed to meet the production needs of different specifications, reducing die change time. By adding multiple belt drums, production efficiency can be greatly improved. It also enhances product performance: the wound tread fits better, eliminating tread interface problems and eliminating concerns about safety issues caused by insufficient tread-carcass compression or poor dynamic-static balance due to excessive compression. Furthermore, it optimizes equipment and energy consumption: the extruder power used for tread winding is much lower than that used for normal tread extrusion, and the extrusion temperature during production is also much lower than that of extruding the entire tread at once. This reduces energy consumption for the tread extrusion portion, and because there are no unusable tread ends due to die changes, production efficiency is improved and energy consumption is reduced. Attached Figure Description
[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a simplified schematic diagram illustrating the working process of the present invention; Figure 2 This is a schematic diagram of the pressing device in this invention; Figure 3 This is a schematic diagram of the pressing device in the present invention from the front view. Figure 4 This is a schematic view of the internal structure of the pressing device in this invention; Figure 5 This is a schematic diagram of the pressing device in this invention from a side view. Figure 6 This is a partially enlarged schematic diagram of point A in this invention; Figure 7 This is a schematic diagram showing the installation position of the tile in this invention; In the diagram: 1-roller, 2-cartridge, 3-support frame, 4-moving bracket, 5-drive cylinder, 6-sliding plate, 7-pressing base, 8-hinge seat, 9-hinge block, 10-slide groove, 11-transition slider, 12-sliding groove, 13-support frame, 14-limiting block, 15-sliding shaft, 16-avoiding groove, 17-extruder head, 18-tile, 19-drum with bundle, 20-drum with bundle rotating device, 21-locking block. Detailed Implementation
[0012] See attached document Figure 1 This invention provides a tire tread winding method. A small-diameter extruder is installed at the forming machine to extrude rubber strips. These strips are then wound onto the tire tread on the forming machine. Because the rubber strips are small and their filling position and area can be controlled by the equipment, tire treads of different shapes can be formed at different locations on the tire. Compared to the original tread process, the advantages are: stable tread forming; multiple windings of small rubber strips meet requirements, resulting in high precision and minimal variation. No need to change the die plate; because it uses multiple windings of small rubber strips, only different widths and thicknesses need to be wound for different specifications, increasing efficiency. No tread joints; because it uses a single rubber strip for winding, the head strip is covered by the upper strip, and the tail strip, with a width of only 10-20mm, significantly reduces the joint width compared to bonding the entire tread strip, making it almost non-existent. Because the bonding is heat-bonded, there is no need to add small rubber sheets under the entire tread rubber to increase adhesion.
[0013] The specific implementation steps are as follows: Step 1: Move the completed tire blanks (excluding the tread, which are also formed here) to this forming machine. Step 2: Select a suitable forming drum and determine the drum's expansion radius and the tire's cross-sectional width; Step 3, see Figure 7 Install corresponding tiles 18 on the forming drum, such as installing curved tiles on motorcycle tires and horizontal tiles on car tires; Step 4: Install the belt drum 19, which is connected to the belt drum rotating device 20 that drives its rotation; Step 5: The forming machine belt drum 19 identifies the center of the tire blank, and a locking block 21 is set at the belt drum 19 to restrict the position of the tire blank steel wire ring, and the tire blank steel wire ring is locked to prevent the tire blank from moving. Step 6: Expand belt drum 19 to support the tire blank. If there is a belt strip, move it to the belt strip contact point for winding. If there is no belt strip, move it directly to the tread winding station for winding. Step 7: Add an extruder to the molding machine to extrude the tread compound; compared to a single extruder, which only requires one extruder, multiple tread extruders are needed to extrude the tread using a multi-compound extruder.
[0014] Step 8: The forming machine must ensure that the belt drum 19 can still rotate at the tread winding point. After the rubber strip is attached to the semi-finished tire blank, the tread is formed by rotating the belt drum 19 and extruding the rubber strip through the extruder. Step nine: Add a rubber strip pressing device. To ensure the rubber strip adheres firmly to the tire carcass, a pressing device is needed to press the rubber strip onto the tire carcass; see [link to relevant documentation]. Figure 1 and Figure 3 The pressing device and the extruder head are set in the same plane and move axially relative to the tire blank at the same time. After the extruder head extrudes the rubber strip, the pressing device presses the rubber strip onto the tire blank, so that the extrusion and pressing of the rubber strip are carried out at the same time.
[0015] Step 10: Add a bending angle to the belt drum 19 or a rotating device to the rubber strip extruder head and pressing device. In order to wrap the tread rubber strip around the entire tread direction, it is necessary to change the angle of the belt drum 19 and move its position back and forth so that the rubber strip can be firmly pressed into various places on the tread according to the curvature of the tread. Alternatively, the extruder head and pressing device can be moved in an arc shape, and the belt drum 19 can be moved back and forth to achieve the wrapping of tread rubber in various directions.
[0016] More belt drums 19 can be added according to the production cycle of the equipment to improve efficiency.
[0017] See Figures 2 to 6 The present invention also includes a pressing device for pressing the rubber strip. The pressing device includes a roller 1 that can contact the tire blank 2. After the extruder head extrudes the rubber strip, the roller 1 contacts the rubber strip to realize the pressing of the rubber strip and the tire blank by the roller 1, expelling the air between the rubber strip and the tire blank 2, so that the rubber strip and the tire blank 2 are tightly bonded, ensuring the bonding quality of the rubber strip and improving the quality of the tire blank 2.
[0018] Preferably, there are two sets of rollers 1. Both sets of rollers 1 can move relative to the tire blank 2 and can also move axially relative to the tire blank 2. Each roller 1 is rotatably connected to a support frame 3. The support frame 3 is connected to a movable bracket 4. The movable bracket 4 is connected to a drive cylinder 5. The extension or retraction state of the two drive cylinders 5 can be controlled independently. The two drive cylinders 5 are connected by a transmission screw. The transmission screw is provided with threads with opposite directions at both ends, so that the two drive cylinders 5 move in opposite directions.
[0019] Through the above structure, the present invention first controls one of the drive cylinders 5 to drive the roller 1 to contact the rubber strip, and the roller 1 presses the rubber strip and the tire carcass together; after the rubber strip is pressed together, the rubber strip and the tire carcass are vented to ensure the reliability of the bonding between the rubber strip and the tire carcass. During venting, initially, the two rollers 1 are positioned close to each other in the middle of the tire blank 2, while the drive cylinder 5 is in a retracted state. During operation, the piston rod of the drive cylinder 5 is extended, and the rollers 1 come into contact with the tire blank 2. Since the tire blank 2 is rotating, the rollers 1 rotate with the tire blank 2 after contact, avoiding relative friction between the rollers 1 and the tire blank 2. The transmission screw is controlled to rotate, which drives the two drive cylinders 5 to move, causing the rollers 1 to move relative to the tire blank 2. That is, the two rollers 1 move from the middle position of the tire blank 2 to both sides. Since the rollers 1 are always in contact with the tire blank 2, when the rollers 1 that are always in contact with the tire blank 2 move axially relative to the tire blank 2, they can expel the air inside the tire blank 2, improve the adhesion between the rubber strip and the tire blank 2, and improve the quality of the tire blank 2.
[0020] See Figure 4 Preferably, one end of the support frame 3 is rotatably connected to the roller 1, the middle part of the support frame 3 is hinged to the movable bracket 4, and the other end of the support frame 3 is provided with a sliding plate 6 that restricts its axial movement relative to the tire blank 2. The sliding plate 6 is slidably connected to the pressing base 7. A hinge seat 8 is fixedly connected to the middle of the support frame 3, and a hinge block 9 is fixedly connected to the movable bracket 4. The hinge seat 8 and the hinge block 9 can swing relative to each other. The hinge seat 8 and the hinge block 9 are connected by a pin. The pressing base 7 is provided with a sliding groove 10. A sliding plate 6 is provided on the inner side of the sliding groove 10 to slide relative to it, so as to realize the function of sliding the sliding plate 6 relative to the pressing base 7. The sliding plate 6 is slidably connected to the movable bracket 4. A transition slider 11 is provided between the movable bracket 4 and the sliding plate 6. The transition slider 11 is fixedly connected to the movable bracket 4. A vertical sliding groove 12 is opened on the transition slider 11. A sliding rod 13 is provided in the sliding groove 12 to slide relative to it. The sliding rod 13 is connected to the sliding plate 6, so that the sliding plate 6 can move relative to the movable bracket 4 along the axial direction of the tire blank 2. At the same time, the sliding plate 6 can slide with the movable bracket 4, so that the sliding plate 6 and the movable bracket 4 move closer to or away from the tire blank 2.
[0021] See Figure 4A limiting block 14 is provided between the support frame 3 and the sliding plate 6. One end of the limiting block 14 is connected to the sliding plate 6, and the other end of the limiting block 14 is slidably connected to the support frame 3. The other end of the limiting block 14 is provided with a sliding shaft 15 that slides relative to the support frame 3. The sliding shaft 15 is fitted inside the support frame 3. An avoidance groove 16 is provided on the support frame 3. The sliding shaft 15 is located inside the avoidance groove 16. The size of the avoidance groove 16 is larger than the shaft diameter of the sliding shaft 15.
[0022] Through the above structure, when the transmission screw rotates, it drives the drive cylinder 5 to move to both sides, causing the moving bracket 4 to move axially relative to the tire blank 2. Since the sliding plate 6 is slidably connected to the pressing base 7, the sliding plate 6 is restricted by the pressing base 7 and cannot move axially relative to the tire blank 2. Since the moving bracket 4 is hinged to the support frame 3 in the middle, the moving bracket 4 can drive the support frame 3 to move axially relative to the tire blank 2. Since there is a limiting block 14 between the support frame 3 and the sliding plate 6, the moving bracket 4 can make the support frame 3 tilt when it moves axially relative to the tire blank 2, thereby causing the roller 1 to tilt relative to the tire blank 2. The tilted roller 1 can generate a larger contact area relative to the tire blank 2, so that the roller 1 can achieve a better pressing effect on the rubber strip on the surface of the tire blank.
[0023] This invention improves production efficiency and flexibility through the above steps: different specifications can be wound using the same die; only equipment parameters and belt drum cover plates need to be changed to meet the production needs of different specifications, reducing die change time. By adding multiple belt drums, production efficiency can be greatly improved. It also enhances product performance: the wound tread fits better, eliminating tread interface problems and eliminating concerns about safety issues caused by insufficient tread-carcass compression or poor dynamic-static balance due to excessive compression. Furthermore, it optimizes equipment and energy consumption: the extruder power used for tread winding is much lower than that used for normal tread extrusion, and the extrusion temperature during production is also much lower than that of extruding the entire tread at once. This reduces energy consumption for the tread extrusion portion, and because there are no unusable tread ends due to die changes, production efficiency is improved and energy consumption is reduced.
[0024] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A method for winding tire tread, characterized in that, Includes the following steps: Step 1: Move the completed tire blanks (excluding the tread) to this forming machine. Step 2: Select a suitable forming drum and determine the drum's expansion radius and the tire's cross-sectional width; Step 3: Install the corresponding tiles on the forming drum; Step 4: Install the belt drum; Step 5: The forming machine belt drum identifies the center of the tire blank and locks the steel wire ring of the tire blank to prevent the tire blank from moving. Step 6: Expand the belt drum to support the tire blank. If there is a belt strip, move it to the belt strip contact point for winding. If there is no belt strip, move it directly to the tread winding station for winding. Step 7: Add an extruder to the molding machine to extrude the tread compound; Step 8: Ensure that the belt drum of the forming machine can still rotate at the tread winding point. After the rubber strip is attached to the semi-finished tire blank, the tread is formed by rotating the belt drum and extruding the rubber strip through the extruder. Step 9: Add a rubber strip pressing device to ensure that the rubber strip adheres to the tire blank; Step 10: Increase the bending angle of the belt drum or the rotation of the rubber strip extruder head and pressing device to ensure that the tread rubber can wrap around the entire tread. Adjust the angle change and back-and-forth position movement of the belt drum to ensure that the rubber strip can be pressed into the tread according to the tread curvature; or control the extruder head and pressing device to move in an arc shape, and the belt drum to move back and forth to achieve multi-directional wrapping of the tread rubber.
2. The tire tread winding method as described in claim 1, characterized in that, It includes a pressing device for pressing rubber strips, the pressing device including rollers capable of contacting the tire blank.
3. The tire tread winding method as described in claim 2, characterized in that, The rollers are provided in two sets, and both sets of rollers can move relative to the tire blank and can also move axially relative to the tire blank. Each roller is rotatably connected to a support frame, the support frame is connected to a movable bracket, the movable bracket is connected to a drive cylinder, and the two drive cylinders move in opposite directions.
4. The tire tread winding method as described in claim 3, characterized in that, One end of the support frame is rotatably connected to the roller, the middle part of the support frame is hinged to the movable bracket, and the other end of the support frame is provided with a sliding plate that restricts its axial movement relative to the tire blank. The sliding plate is slidably connected to the pressing base and the sliding plate is slidably connected to the movable bracket.
5. A tire tread winding method as described in claim 4, characterized in that, A transition slider is provided between the movable support and the sliding plate. The transition slider is fixed to the movable support. A sliding groove is provided on the transition slider, which runs vertically through it. A sliding rod is provided in the sliding groove and slides relative to it. The sliding rod is connected to the sliding plate.
6. A tire tread winding method as described in claim 4, characterized in that, A limiting block is provided between the support frame and the sliding plate. One end of the limiting block is connected to the sliding plate, and the other end of the limiting block is slidably connected to the support frame. The other end of the limiting block is provided with a sliding shaft that slides relative to the support frame. The sliding shaft is fitted inside the support frame. An clearance groove is provided on the support frame, and the sliding groove is located inside the clearance groove. The size of the clearance groove is larger than the shaft diameter of the sliding shaft.