Tire bead forming device and tire bead forming method

Abstract

The invention provides a tire bead forming device and a tire bead forming method.The tire bead forming device comprises a forming machine, the forming machine comprises a forming machine main machine, a driving device, a forming machine main shaft and a bending forming plate, the driving device drives the forming machine main shaft to rotate, and the bending forming plate is connected to the outer side of the forming machine main machine; the bending forming plate is located over the forming machine main shaft, a forming gap is formed between the bending forming plate and the forming machine main machine, a ring buckling disc is arranged on the forming machine main shaft, the ring buckling disc penetrates through the forming gap in the circumferential direction of the ring buckling disc, and the ring buckling disc is used for fixing a steel wire ring; the extruding machine comprises an extruding machine main body and an extruding nozzle communicated with the extruding machine main body, and the extruding nozzle can extrude apex to the steel wire ring in the forming gap when moving. According to the technical scheme, the problem that in the related technology, in the tire bead production process, joint defects are likely to be generated in the apex is effectively solved.

Description

Technical Field

[0001] The invention relates to the field of tire design and manufacturing, and in particular to a tire bead molding device and a tire bead molding method. Background Art

[0002] Bead production is a key step in the tire manufacturing process. The process commonly used in the industry currently includes extruding the apex, cooling, and bonding the wire ring to the apex. Although this traditional process is mature, it also has some obvious limitations. First, since a larger space is required to accommodate the extrusion equipment and cooling device, the entire production line occupies a larger space, which poses a challenge to the factory's spatial layout and cost control. Secondly, the apex needs to be cooled after extrusion. The bonding and cutting operations in this process can easily form joint defects at both ends of the apex. These defects are caused by joints that are too large or too small. They not only affect the appearance of the tire, but more importantly, they may become potential quality risks during the use of the tire, increasing the failure rate and safety hazards.

[0003] For OTR tires, the huge size, high cost, and complex structural design all contribute to the extended production cycle. In addition, the high hardness and large size of the apex of OTR tires make the extrusion process more difficult. During the extrusion process, the temperature and pressure need to be precisely controlled to ensure the uniformity and quality of the apex. These challenges not only increase production costs, but also place higher demands on production efficiency and product quality. Summary of the invention

[0004] The main purpose of the present invention is to provide a tire bead forming device and a tire bead forming method to solve the problem that the apex rubber in the tire bead production process in the related art is prone to joint defects.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a tire bead forming device is provided, including: a forming machine, including a forming machine main body, a driving device, a forming machine main shaft and a bending forming plate, the driving device is arranged on the forming machine main body, the forming machine main shaft is rotatably arranged on the forming machine main body, the driving device drives the forming machine main shaft to rotate, the bending forming plate is connected to the outside of the forming machine main body, the bending forming plate is located directly above the forming machine main shaft, and a forming gap is formed between the bending forming plate and the forming machine main body, a buckle ring disk is arranged on the forming machine main shaft, the buckle ring disk passes through the forming gap along its circumference, and the buckle ring disk is used to fix the wire ring, wherein the forming machine main shaft drives the buckle ring disk to rotate when it rotates, so that the wire ring on the buckle ring disk rotates; an extruder, including an extruder main body and an extrusion nozzle connected to the extruder main body, and the extrusion nozzle can extrude apex rubber onto the wire ring in the forming gap when it moves.

[0006] Furthermore, the molding gap includes a vertical gap and an expanded gap arranged from bottom to top, the width of the vertical gap is equal from bottom to top, the width of the expanded gap gradually increases from bottom to top, the buckle ring disk passes through the vertical gap along its circumference, and the extrusion nozzle can extrude the triangle rubber onto the wire ring in the vertical gap and / or the expanded gap.

[0007] Furthermore, the bending forming plate includes a vertical section connected to the forming machine main body, a first arc section connected to the vertical section, and a second arc section connected to the first arc section, wherein the vertical section, the first arc section and the second arc section are connected in sequence from bottom to top, and the curvature of the second arc section is smaller than that of the first arc section.

[0008] Furthermore, the radius of the first arc segment is greater than the radius of the outer surface of the drum shoulder of the forming drum, and / or the connection between the second arc segment and the first arc segment protrudes upward from the top surface of the forming drum.

[0009] Furthermore, a distance from an end of the second arc segment away from the first arc segment to an end where the first arc segment and the second arc segment are connected is greater than 200 mm.

[0010] Furthermore, a plurality of indicating scales are arranged on the curved forming plate from bottom to top.

[0011] Furthermore, the tire bead forming device also includes an X-axis guide rail connected to the forming machine main body, a Z-axis guide rail slidably arranged on the X-axis guide rail, and a Y-axis guide rail slidably arranged on the Z-axis guide rail, and the extrusion nozzle is slidably arranged on the Y-axis guide rail.

[0012] Furthermore, the tire bead forming device also includes a first stepper motor for driving the Z-axis guide rail to slide along the direction of the X-axis guide rail, a second stepper motor for driving the Y-axis guide rail to slide along the direction of the Z-axis guide rail, and a third stepper motor for driving the extrusion nozzle to slide along the direction of the Y-axis guide rail. The first stepper motor is arranged on the Z-axis guide rail, the second stepper motor is arranged on the Y-axis guide rail, and the third stepper motor is arranged on the extrusion nozzle. A first transmission structure is arranged between the first stepper motor and the X-axis guide rail, a second transmission structure is arranged between the second stepper motor and the Z-axis guide rail, and a third transmission structure is arranged between the third stepper motor and the Y-axis guide rail.

[0013] According to another aspect of the present invention, a tire bead molding method is provided, in which the tire bead molding method is adopted by the above-mentioned tire bead molding device to realize the molding of the tire bead, and the tire bead molding method comprises the following steps: cyclically rotating the wire ring, and controlling the extrusion nozzle of the extruder to extrude the apex rubber onto the wire ring in the molding gap, and at the same time using a curved molding plate to stop the extruded apex rubber to form a curved shape; laying multiple layers of apex rubber on the wire ring so that the multiple layers of apex rubber adhere to the wire ring.

[0014] Furthermore, the step of laying the multi-layer apex adhesive on the wire ring includes: controlling the extrusion nozzle to adopt a reciprocating circulation method to lay the multi-layer apex adhesive on the wire ring.

[0015] According to the technical solution of the present invention, the tire bead forming device includes: a forming machine and an extruder. The forming machine includes a forming machine mainframe, a driving device, a forming machine main shaft and a bending forming plate. The driving device is arranged on the forming machine mainframe. The forming machine main shaft is rotatably arranged on the forming machine mainframe. The driving device drives the forming machine main shaft to rotate. The bending forming plate is connected to the outside of the forming machine mainframe. The bending forming plate is located directly above the forming machine main shaft and forms a forming gap with the forming machine mainframe. A buckle ring disk is arranged on the forming machine main shaft. The buckle ring disk passes through the forming gap along its circumference. The buckle ring disk is used to fix the wire ring. When the forming machine main shaft rotates, the buckle ring disk is driven to rotate so that the wire ring on the buckle ring disk rotates. The extruder includes an extruder main body and an extrusion nozzle connected to the extruder main body. When the extrusion nozzle moves, it can extrude the apex rubber onto the wire ring in the forming gap. When the main shaft of the forming machine rotates, it drives the bead plate to rotate, so that the wire ring on the bead plate rotates. When the wire ring rotates in a cycle, the extrusion nozzle of the extruder extrude the apex rubber onto the wire ring, and the bending forming plate can stop the apex rubber to prevent the apex rubber from overflowing below the wire ring, so as to utilize the shape of the bending forming plate to stably form the extruded apex rubber into a curved shape. As the number of turns of the wire ring increases, the number of apex rubber layers laid on the wire ring also increases, and finally a multi-layer apex rubber will be formed and adhered to the wire ring to facilitate the molding of the tire bead. In this way, during the tire bead molding process, the joints at both ends of the apex rubber are squeezed out from the extrusion nozzle, rather than obtained by fitting and cutting operations, so that the joints at both ends of the apex rubber tend to be consistent, effectively reducing the defects of excessively large or too small joints, and solving the problem of the apex rubber easily generating joint defects during the bead production process in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic front view of an embodiment of a tire bead forming device according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A schematic side view of a tire bead forming device;

[0019] Figure 3 Shows Figure 1 A schematic front view of a bending forming plate of a tire bead forming device;

[0020] Figure 4 Shows Figure 1 A schematic front view of a curved forming plate of a tire bead forming device with height and radius indications;

[0021] Figure 5 Shows Figure 1 A schematic side view of a curved forming plate of a tire bead forming device;

[0022] Figure 6 A schematic diagram showing the laying of apex rubber during the tire bead forming process according to an embodiment of the tire bead forming device of the present invention;

[0023] Figure 7 A simplified schematic diagram of a building drum used in an embodiment of a tire bead building apparatus according to the present invention is shown.

[0024] The above drawings include the following reference numerals:

[0025] 11. Main machine of the forming machine; 12. Main shaft of the forming machine; 13. Ring retaining plate;

[0026] 20. Bending forming plate; 21. Vertical section; 22. First arc section; 23. Second arc section; 24. Forming gap; 241. Vertical gap; 242. Enlarged gap; 25. Fastener;

[0027] 30. Squeeze out the mouth;

[0028] 41. X-axis guide rail; 42. Z-axis guide rail; 43. Y-axis guide rail;

[0029] 51. Wire ring; 52. Triangle rubber; 53. Forming drum. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] like Figures 1 to 6 As shown, the present application provides a tire bead forming device, and an embodiment of the tire bead forming device includes: a forming machine and an extruder. The forming machine includes a forming machine mainframe 11, a driving device, a forming machine main shaft 12, and a bending forming plate 20. The driving device is arranged on the forming machine mainframe 11, and the forming machine main shaft 12 is rotatably arranged on the forming machine mainframe 11. The driving device drives the forming machine main shaft 12 to rotate. The bending forming plate 20 is connected to the outside of the forming machine mainframe 11. The bending forming plate 20 is located directly above the forming machine main shaft 12, and a forming gap 24 is formed between the bending forming plate 20 and the forming machine mainframe 11. A buckle ring plate 13 is arranged on the forming machine main shaft 12, and the buckle ring plate 13 passes through the forming gap 24 along its circumference. The buckle ring plate 13 is used to fix the wire ring 51, wherein the buckle ring plate 13 is driven to rotate when the forming machine main shaft 12 rotates, so that the wire ring 51 on the buckle ring plate 13 rotates. The extruder includes an extruder body and an extrusion nozzle 30 connected to the extruder body. When the extrusion nozzle 30 moves, it can extrude the apex 52 onto the wire ring 51 in the molding gap 24. The driving device includes a driving motor, a driving pump, a reducer, and a belt transmission structure or a gear transmission structure therebetween.

[0034] The technical solution of the embodiment of the tire bead forming device is applied. When the main shaft 12 of the forming machine rotates, the bead disc 13 is driven to rotate, so that the wire ring 51 on the bead disc 13 rotates. The extruder includes an extruder body and an extrusion nozzle 30 connected to the extruder body. When the extrusion nozzle 30 is movable, it can extrude the apex 52 onto the wire ring 51 in the forming gap 24. When the main shaft 12 of the forming machine rotates, the bead disc 13 is driven to rotate, so that the wire ring 51 on the bead disc 13 rotates. When the wire ring 51 rotates in a cycle, the extrusion nozzle 30 of the extruder extrude the apex 52 onto the wire ring 51, and the bending forming plate 20 can stop the apex 52 to prevent the apex 52 from overflowing below the wire ring 51, so as to utilize the shape of the bending forming plate 20 to stably form the extruded apex 52 into a curved shape. As the number of rotations of the wire ring 51 increases, the number of layers of the apex 52 laid on the wire ring 51 also increases, and finally a multi-layer apex 52 will be formed and adhered to the wire ring 51, so as to facilitate the molding of the tire bead. In this way, during the tire bead molding process, the joints at both ends of the apex 52 are extruded from the extrusion nozzle 30, rather than obtained by laminating and cutting operations, so that the joints at both ends of the apex 52 tend to be consistent, effectively reducing the generation of joint defects that are too large or too small, and solving the problem of the apex in the bead production process in the related technology that joint defects are easy to occur. In this way, by using the method of apex laying and winding molding, the joint problems existing in the current production process and the problem that the apex is not easy to bend can be solved, and the production efficiency can be improved, and the investment in equipment and plant buildings can be saved. At the same time, the product quality of engineering machinery tires can be improved and the service life can be increased, so that the performance of the finished tire can reach the design target.

[0035] like Figures 1 to 6 As shown, the forming gap 24 includes a vertical gap 241 and an enlarged gap 242 arranged from bottom to top, and the width of the vertical gap 241 is equal from bottom to top. The width of the enlarged gap 242 gradually increases from bottom to top. The buckle ring plate 13 passes through the vertical gap 241 along its circumference, and the extrusion nozzle 30 can extrude the apex 52 onto the wire ring 51 in the vertical gap 241 and / or the enlarged gap 242. This design enables the extrusion nozzle 30 to perform precise extrusion operations at different heights, which not only ensures the uniform laying of the apex 52 at different positions, but also allows the extrusion nozzle 30 to move horizontally during the extrusion process by changing the width gradient of the enlarged gap 242, effectively controlling the shape of the apex, thereby improving the laying accuracy and efficiency of the apex 52 on the wire ring 51. In addition, this design allows the extrusion nozzle 30 to move flexibly in the vertical gap 241 and the expanded gap 242, reducing the shear stress of the apex rubber 52 during the laying process, avoiding the occurrence of joint defects, making the joints consistent, and significantly improving the quality of tire bead molding.

[0036] like Figures 1 to 6As shown, the bending forming plate 20 includes a vertical section 21 connected to the forming machine main body 11, a first arc section 22 connected to the vertical section 21, and a second arc section 23 connected to the first arc section 22. The vertical section 21, the first arc section 22, and the second arc section 23 are sequentially connected from bottom to top, and the curvature of the second arc section 23 is smaller than that of the first arc section 22. This multi-segment structural design enables the apex 52 to be formed according to a preset curved path during extrusion, especially under the guidance of the second arc section 23, the apex 52 can achieve more complex shape requirements without generating creases or bubbles during the forming process, thereby improving the forming accuracy and aesthetics of the apex. Figure 4 The height of the vertical segment 21 is h1, the height of the first arc segment 22 is h2, and the height of the second arc segment 23 is h3. The radius of the outer arc surface of the first arc segment 22 is R1, and the radius of the outer arc surface of the second arc segment 23 is R2. The width of the vertical segment 21, the width of the first arc segment 22, and the width of the second arc segment 23 increase from bottom to top.

[0037] The bending forming plate 20 further comprises a horizontal section connected between the forming machine main body 11 and the vertical section 21, and the horizontal section is fixed to the forming machine main body 11 by a fastener 25. The fastener 25 is preferably a bolt.

[0038] like Figures 1 to 7 As shown, the radius of the first arc segment 22 is greater than the radius of the outer surface of the drum shoulder of the forming drum 53. The connection between the second arc segment 23 and the first arc segment 22 protrudes upward from the top surface of the forming drum 53. This design ensures that the apex 52 can smoothly transition and closely fit the drum shoulder curve of the forming drum 53 during the process of being extruded from the extrusion nozzle 30 to the wire ring 51, avoiding the stretching and tearing of the apex during the fitting process, and maintaining the integrity and uniformity of the apex. In addition, the connection between the second arc segment 23 and the first arc segment 22 protrudes upward from the top surface of the forming drum 53. This design allows the apex to be pre-bent during molding, so that it is smoother when fitting on the forming drum 53, reducing quality problems.

[0039] like Figures 1 to 6 As shown, the distance from one end of the second arc segment 23 away from the first arc segment 22 to the end where the first arc segment 22 and the second arc segment 23 are connected is greater than 200 mm. This design ensures that the apex 52 has enough space to complete pre-bending during extrusion without affecting the molding quality due to space limitations. At the same time, the long second arc segment 23 also enhances the stability of the apex, prevents shaking and displacement during the molding process, and further improves the molding accuracy of the apex.

[0040] like Figures 1 to 6As shown, a plurality of indicator scales are arranged from bottom to top on the bending forming plate 20. The laying height of the apex 52 can be accurately displayed, which is convenient for the operator and the control system to monitor and adjust the laying process of the apex in real time, ensuring that the thickness of each layer of the apex is consistent, avoiding quality problems and safety hazards caused by uneven thickness, and improving the production consistency and reliability of the tire bead.

[0041] like Figures 1 to 6 As shown, the tire bead molding device also includes an X-axis guide rail 41 connected to the molding machine mainframe 11, a Z-axis guide rail 42 slidably arranged on the X-axis guide rail 41, and a Y-axis guide rail 43 slidably arranged on the Z-axis guide rail 42. The extrusion nozzle 30 is slidably arranged on the Y-axis guide rail 43. The arrangement of the X-axis guide rail 41, the Z-axis guide rail 42 and the Y-axis guide rail 43 enables the extrusion nozzle 30 to move freely in a three-dimensional space. This high degree of freedom of movement can not only accurately control the extrusion position and direction of the apex rubber, but also can be flexibly adjusted according to the specific design requirements of the tire bead, thereby realizing a more complex molding process and improving the production flexibility and adaptability of the tire bead.

[0042] It should be noted that the X-axis guide rail 41 of the present application extends along the X-axis direction of the three-dimensional coordinate system, the Z-axis guide rail 42 extends along the Z-axis direction of the three-dimensional coordinate system, and the Y-axis guide rail 43 extends along the Y-axis direction of the three-dimensional coordinate system.

[0043] like Figures 1 to 6 As shown, the tire bead forming device also includes a first stepper motor for driving the Z-axis guide rail 42 to slide along the direction of the X-axis guide rail 41, a second stepper motor for driving the Y-axis guide rail 43 to slide along the direction of the Z-axis guide rail 42, and a third stepper motor for driving the extrusion nozzle 30 to slide along the direction of the Y-axis guide rail 43. The first stepper motor is arranged on the Z-axis guide rail 42, the second stepper motor is arranged on the Y-axis guide rail 43, the third stepper motor is arranged on the extrusion nozzle 30, a first transmission structure is arranged between the first stepper motor and the X-axis guide rail 41, a second transmission structure is arranged between the second stepper motor and the Z-axis guide rail 42, and a third transmission structure is arranged between the third stepper motor and the Y-axis guide rail 43. The use of the first stepper motor, the second stepper motor and the third stepper motor enables the extruder nozzle 30 to achieve precisely controlled movement in the three directions of the X-axis, the Y-axis and the Z-axis. Through the first transmission structure, the second transmission structure and the third transmission structure, the movement speed, direction and path of the extruder nozzle 30 can be ensured to be accurate. This high-precision control capability is the key to achieving seamless and defect-free extrusion of the apex rubber 52, which greatly improves the production quality and efficiency of the tire bead.

[0044] The first transmission structure, the second transmission structure and the third transmission structure all include gears and racks. Taking the first transmission structure as an example, the gear is arranged on the motor shaft of the first stepper motor, and the rack is arranged on the X-axis guide rail 41. The gear and the rack are meshed and transmitted. In this embodiment, a controller is arranged on the molding machine host 11, and the first stepper motor, the second stepper motor and the third stepper motor are all connected to the controller for control. The molding machine program is stored in the controller.

[0045] (1) The curved forming plate 20 can be selected and replaced according to the height of the apex and the curve of the forming machine head to meet the product design requirements.

[0046] (2) When the molding machine program enters tire bead molding, the molding machine program controls the stepper motor to rotate, and the apex rubber extruder moves longitudinally and vertically to reach the predetermined paving starting point.

[0047] (3) The extruder nozzle moves toward the upper end of the wire ring along the moving path formed by the X-axis guide rail 41, the Z-axis guide rail 42 and the Y-axis guide rail 43 toward the main shaft of the molding machine. When the extruder nozzle approaches the wire ring through the proximity switch or the Hall switch, it reaches the predetermined position; at the same time, the extruder nozzle moves horizontally to the bending molding plate; the first stepper motor, the second stepper motor and the third stepper motor stop running to synchronously control the Z-axis guide rail 42, the Y-axis guide rail 43 and the extruder nozzle 30 to stop moving. At this time, the main shaft of the molding machine rotates under the control of the molding machine main control program, and the gear pump of the extruder starts to rotate, and the rubber in the extruder flows out through the extruder nozzle.

[0048] (4) The height of the vertical segment 21 is h1, the first arc segment 22 is tangent to the vertical segment 21, the height of the first arc segment 22 is h2, and the R1 value of the first arc segment 22 should be greater than the radius of the drum shoulder curve of the forming drum 53, generally more than 100 mm. The radius R2 of the second arc segment 23 should be at least 150 mm greater than R1. The vertex position of the first arc segment 22 is 100 mm higher than the top surface of the forming drum; the vertex position of the second arc segment 23 is more than 200 mm higher than the vertex of the first arc segment 22. The above-mentioned multiple indicator scales are in millimeter level, and the scale can be used to display the apex glue laying height.

[0049] (5) When the apex is wound and formed, the extrusion program stored in the extruder calculates the volume V of the apex (after application) at the current extrusion nozzle through the speed ω of the main shaft of the molding machine Apex =ω*R (R is the distance between the extrusion nozzle and the centerline of the main shaft of the molding machine), the extrusion speed of the extrusion nozzle is v Die， It is controlled by the gear pump speed, that is, the extrusion process). According to the volume invariance principle:

[0050] V Apex =S*ω*R*t;

[0051] V Die =v Die *t*S;

[0052] V Apex =V Die ;

[0053] That is, S*ω*R*t=v Die *t*S;

[0054] That is v Die =ω*R, where S in the above formula is the area of ​​the extrusion nozzle, t is the time, V Apex is the volume of the apex rubber, and ω is the speed of the main shaft of the molding machine.

[0055] (6) When the apex is wound, the extruder nozzle (the extruder controls the movement of the extruder nozzle alone) is first close to the vertical section 21 of the bending forming plate, and the extruder nozzle moves from right to left (the movement direction of the apex nozzle on the other side is opposite). When the width of the rubber material reaches the predetermined value, the extruder head moves vertically to a certain height H. Generally, H should be equal to the height H of the extruder nozzle. 0 If the inclination angle of the extruder nozzle is α (program-controlled inclination angle), the vertical movement height of the extruder head is H = H 0 *cosα. After the extruder moves vertically to a height of H, the bending plate is fixed on the buckle ring plate, and the bending plate is fixed to the side of the molding machine mainframe by screws or bolts. The extruder head continuously moves back and forth horizontally under program control until the apex glue paving reaches the specified height. The above * is a multiplication sign.

[0056] (7) After the apex rubber is laid to a specified height, the gear pump of the apex rubber extruder stops running, and at the same time, the extruder head moves away from the main shaft of the molding machine along the longitudinal slide rail.

[0057] The main control program of the forming machine moves the bead plate along the main axis of the forming machine toward the forming drum according to the forming sequence, and pushes the tire bead to the forming drum; after being pushed to the specified position, the turn-up capsule is inflated, and the propulsion cover continues to move along the main axis. The propulsion cover drives the turn-up capsule to move the apex rubber, so that the apex rubber fits with other tire components on the forming drum.

[0058] The present application also provides a tire bead forming method, which is used to form the tire bead by the tire bead forming device. The tire bead forming method includes the following steps: cyclically rotating the wire ring 51, and controlling the extruder nozzle 30 to extrude the apex 52 onto the wire ring 51 in the forming gap 24, and using the bending forming plate 20 to stop the extruded apex 52 to form a curved shape; laying multiple layers of apex 52 on the wire ring 51 so that the multiple layers of apex 52 adhere to the wire ring 51. Since the tire bead forming device can solve the problem of joint defects in the apex during the bead production process in the related art, the tire bead forming method using the tire bead forming device can solve the same technical problem.

[0059] During the implementation of the tire bead forming method, the wire ring 51 is cyclically rotated while the extruder nozzle 30 is controlled to extrude the apex rubber 52 onto the wire ring 51 in the forming gap 24, and the bending forming plate 20 is used to stop and pre-bend the apex rubber during extrusion. This method avoids joint defects in traditional bonding and cutting operations through a continuous extrusion process, and at the same time, utilizes the shape guidance of the bending forming plate 20 to achieve stable forming of the apex rubber, thereby improving the production efficiency and product quality of the tire bead.

[0060] like Figures 1 to 6 As shown, the step of laying the multi-layer apex 52 on the wire ring 51 includes: controlling the extrusion nozzle 30 to adopt a back-and-forth circulation method to lay the multi-layer apex 52 on the wire ring 51. The extrusion nozzle 30 adopts a back-and-forth circulation method. Figure 6 The arrows of the C1 reciprocating cycle reciprocate, and this design enables each extrusion to be accurately laid on the basis of the previous layer of apex rubber, avoiding misalignment and gaps between layers, ensuring the close fit of multiple layers of apex rubber, and improving the reliability and safety of tire bead molding. By controlling the movement and extrusion speed of the extrusion nozzle 30, the apex rubber 52 can be evenly laid, further improving the overall performance and service life of the tire bead.

[0061] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0063] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tire bead forming device, characterized in that: include: A forming machine, comprising a forming machine mainframe (11), a driving device, a forming machine main shaft (12) and a bending forming plate (20), wherein the driving device is arranged on the forming machine mainframe (11), the forming machine main shaft (12) is rotatably arranged on the forming machine mainframe (11), the driving device drives the forming machine main shaft (12) to rotate, the bending forming plate (20) is connected to the outside of the forming machine mainframe (11), and the bending forming plate (20) is located on the forming machine main shaft The main shaft (12) is directly above the main shaft (12), and a molding gap (24) is formed between the main shaft (11) and the molding machine. A buckle ring disk (13) is provided on the main shaft (12) of the molding machine. The buckle ring disk (13) passes through the molding gap (24) along its circumferential direction. The buckle ring disk (13) is used to fix the wire ring (51). When the main shaft (12) of the molding machine rotates, the buckle ring disk (13) is driven to rotate, so that the wire ring (51) on the buckle ring disk (13) rotates; The extruder comprises an extruder body and an extrusion nozzle (30) connected to the extruder body. When the extrusion nozzle (30) is movable, it can extrude an apex rubber (52) onto the wire ring (51) in the molding gap (24).

2. The tire bead forming device according to claim 1, characterized in that: The molding gap (24) comprises a vertical gap (241) and an enlarged gap (242) arranged from bottom to top, the width of the vertical gap (241) is equal from bottom to top, and the width of the enlarged gap (242) gradually increases from bottom to top, the buckle ring plate (13) passes through the vertical gap (241) along its circumference, and the extrusion nozzle (30) can extrude the apex rubber (52) onto the wire ring (51) in the vertical gap (241) and / or the enlarged gap (242).

3. The tire bead forming device according to claim 2, characterized in that: The bending forming plate (20) comprises a vertical section (21) connected to the forming machine main unit (11), a first arc section (22) connected to the vertical section (21), and a second arc section (23) connected to the first arc section (22), wherein the vertical section (21), the first arc section (22) and the second arc section (23) are connected in sequence from bottom to top, and the curvature of the second arc section (23) is smaller than that of the first arc section (22).

4. The tire bead forming device according to claim 3, characterized in that: The radius of the first arc segment (22) is greater than the radius of the outer surface of the drum shoulder of the forming drum (53), and / or the connection between the second arc segment (23) and the first arc segment (22) protrudes upward from the top surface of the forming drum (53).

5. The tire bead forming device according to claim 3, characterized in that: The distance from one end of the second arc segment (23) away from the first arc segment (22) to one end where the first arc segment (22) and the second arc segment (23) are connected is greater than 200 mm.

6. The tire bead forming device according to any one of claims 1 to 5, characterized in that: The curved forming plate (20) is provided with a plurality of indicating scales from bottom to top.

7. The tire bead forming device according to any one of claims 1 to 5, characterized in that: The tire bead molding device also includes an X-axis guide rail (41) connected to the molding machine main body (11), a Z-axis guide rail (42) slidably arranged on the X-axis guide rail (41), and a Y-axis guide rail (43) slidably arranged on the Z-axis guide rail (42), and the extrusion nozzle (30) is slidably arranged on the Y-axis guide rail (43).

8. The tire bead forming device according to claim 7, characterized in that: The tire bead forming device further comprises a first stepper motor for driving the Z-axis guide rail (42) to slide along the direction of the X-axis guide rail (41), a second stepper motor for driving the Y-axis guide rail (43) to slide along the direction of the Z-axis guide rail (42), and a third stepper motor for driving the extrusion nozzle (30) to slide along the direction of the Y-axis guide rail (43); The first stepper motor is arranged on the Z-axis guide rail (42), the second stepper motor is arranged on the Y-axis guide rail (43), and the third stepper motor is arranged on the extrusion nozzle (30). A first transmission structure is arranged between the first stepper motor and the X-axis guide rail (41), a second transmission structure is arranged between the second stepper motor and the Z-axis guide rail (42), and a third transmission structure is arranged between the third stepper motor and the Y-axis guide rail (43).

9. A tire bead forming method, characterized in that: The tire bead molding device according to any one of claims 1 to 8 adopts the tire bead molding method to realize tire bead molding, and the tire bead molding method comprises the following steps: The wire ring (51) is cyclically rotated, and at the same time, an extrusion nozzle (30) of an extruder is controlled to extrude an apex rubber (52) onto the wire ring (51) in a forming gap (24), and at the same time, a curved forming plate (20) is used to stop the extruded apex rubber (52) to form a curved shape; The multiple layers of the apex glue (52) are laid on the wire ring (51) so that the multiple layers of the apex glue (52) adhere to the wire ring (51).

10. The tire bead forming method according to claim 9, characterized in that: The step of laying the multi-layer apex rubber (52) on the wire ring (51) comprises: The extrusion nozzle (30) is controlled to adopt a reciprocating circulation method to lay multiple layers of the apex rubber (52) on the wire ring (51).

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