A tire air bag press process

Abstract

The application discloses a kind of mute tire air bag pressing process, comprising the following steps: S1, conveying tire;S2, tire positioning;S3, pressing part moves down;S4, prop open tire sub-port;S5, air bag inflation pressing;S6, air bag pressure relief contraction, by air release inside air bag, air bag can be contracted to initial state, so as to make air bag and tire separate, to facilitate the next pressing action;S7, prop open device reset;S8, bottom frame moves up reset.The application uses air bag to inflate to extrude and fit mute material, can adapt to different diameter tire, and match different tread curvature, can carry out pressure maintaining treatment to mute material at the beginning, long pressure maintaining time, high pressing efficiency, prop open device is used to prop open tire sub-port a distance, to fully maintain pressure to mute material, also can make the expansion force of air bag mainly act on mute material on tire inner wall, so that the adhesive outside mute material can fully infiltrate into mute material.

Description

Technical Field

[0001] This invention relates to the field of silent tire processing technology, and in particular to a silent tire airbag pressing process. Background Technology

[0002] Currently, during the tire manufacturing process, sound-absorbing materials are generally added to the inner wall of the tire to improve its noise reduction effect. The sound-absorbing material is usually a sound-absorbing sponge. The current method of adding sound-absorbing materials is to press and bond the sponge with adhesive to the inner wall of the tire by rolling or pressing with spring pressure plates.

[0003] Whether using rollers (powered or unpowered) or spring pressure plates, the following drawbacks exist during use: During rolling, the rollers cause the adhesive on the sponge to be pushed forward and to the sides, making it difficult for the adhesive to penetrate vertically into the sponge. Furthermore, because the rollers need to rotate continuously, they can only contact the sponge at the same position for a short period, resulting in a very short pressure holding time—only a few seconds of rolling action for a section of sponge to apply pressure. The disadvantages of spring plates are uneven pressure; the pressure varies on both sides depending on the tire diameter. Also, because the spring plate's dimensions are fixed, it's difficult to accommodate the slight curvature of the tire tread. Additionally, the width of the spring pressure plate is difficult to manufacture to a large size, making it unsuitable for the entire or half of a tire. Therefore, multiple relaxation and pressing actions are required, resulting in low efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the technical defects of existing technologies that use rollers and spring pressure plates to compress sponges, such as the difficulty of the adhesive penetrating vertically into the sponge, the short holding time, uneven pressure of the spring plate, the inability of the spring plate to adapt to the slight curvature of the tire tread, and the difficulty of processing the width of the spring pressure plate to a large size, so it cannot adapt to the whole or half of the tire, thus requiring multiple relaxation and compression actions, which is also inefficient. Therefore, this invention proposes a silent tire airbag compression process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A silent tire airbag pressing process includes the following steps:

[0007] S1. Tire conveying: The tire to be processed is conveyed by the conveying device to the base frame of the bonding equipment. Then, the base frame is lowered by the lifting device to expose the support components and support the tire.

[0008] S2. Tire positioning: Activate the positioning device of the bonding equipment to center the tire on the base frame so that the center of the tire is directly below the pressing component.

[0009] S3. The pressing component moves down, and the second lifting device above the bonding equipment is activated, which can push the pressing component down to the center of the tire.

[0010] S4. Open the tire bead, activate the opening device, so that the upper and lower opening plates of the opening device flip outward and open the tire bead a certain distance;

[0011] S5. Airbag inflation and compression: Gas at a certain pressure is injected into the airbag through an external air supply device, which can inflate the airbag. Under the limiting action of the expansion device, the airbag will expand laterally along the upper and lower expansion plates. The upper and lower expansion plates of the tire bead can form a transition plate for tires with different rim diameters when the airbag expands, so as to ensure the direction of the airbag inflation and expansion. When the outer wall of the airbag contacts the sound-absorbing material inside the tire, it can apply pressure evenly to the sound-absorbing material around the perimeter and hold the pressure for a period of time. This can tightly press the adhesive on the outside of the sound-absorbing material to the inner wall of the tire, so that the sound-absorbing material is tightly and fully fixed to the inner wall of the tire.

[0012] S6. Airbag depressurization and contraction: By releasing the air inside the airbag, the airbag can be contracted to its initial state, and a vacuum device is used to suck the airbag back a short distance, which will separate the airbag from the tire to facilitate the next pressing action.

[0013] S7. The spreading device is reset. The upper and lower spreading plates of the spreading device are rotated back to the vertical position and disengaged from the tire bead to facilitate the next tire bead spreading action.

[0014] S8. The base frame moves up and resets, and the lifting device is started again. The lifting device drives the base frame to move up, so that the base frame supports the tire again, while the support components no longer support the tire. In this way, the tire with the sound-absorbing material applied can be transported out by the rolling plate on the base frame.

[0015] The bonding equipment used in the above process steps consists of a lower frame, an upper frame, a base frame, a conveying device, a support assembly, a positioning device, a first lifting device, a second lifting device, and a pressing component. The pressing component consists of a spreading device and an airbag. The base frame includes a base plate, rolling rods, and rolling plates. The support assembly consists of multiple brackets. The first lifting device consists of two lifting cylinders. The second lifting device consists of a servo motor, multiple synchronous pulleys, a synchronous belt, a ball screw, a screw nut, and a lifting plate. The spreading device consists of a fixed hub, a moving plate, an upper spreading plate, a lower spreading plate, a rotating shaft, and a rotating mechanism. The positioning device consists of two slide rails, two slide rail frames, and four positioning rollers. The conveying device uses an electric roller, and the electric roller is mounted on the lower frame.

[0016] Preferably, in step S3, after the pressing component moves down, the horizontal center line of the fixed hub 14 in the pressing component should be aligned with the horizontal center line of the tire.

[0017] Preferably, in step S4, the spacing between the upper and lower supporting plates of the supporting device when they are opened can be customized according to the tire bead spacing.

[0018] Preferably, in step S5, the sound-absorbing material is a material with sound-absorbing sponge, foam, or the like.

[0019] Preferably, the upper frame has four members, which are welded at equal intervals to the corners of the lower frame. The lower end of the base plate is fixedly connected to the telescopic end of the lifting cylinder. The lower end of the lifting cylinder is fixedly installed on the side wall of the lower frame. There are multiple rolling rods that are rotatably connected to the side wall of the base plate. There are multiple rolling plates that are fixedly connected to the rolling rods at equal intervals.

[0020] Preferably, a support plate is fixedly connected to the upper frame, multiple synchronous pulleys are rotatably mounted on the support plate, and the servo motor is fixedly mounted on the support plate. The output shaft of the servo motor is fixedly connected to one of the synchronous pulleys, the ball screw is fixedly connected to the synchronous pulley, the screw nut is threadedly connected to the ball screw, and the screw nut is fixedly connected to the lifting plate.

[0021] Preferably, the lower end of the lifting plate is fixedly connected to the moving plate through multiple lifting columns, the fixed hub is fixedly connected to the lower end of the moving plate, the rotating shaft has multiple shafts and is rotatably arranged on the circumferential sidewall of the fixed hub, the upper supporting plate and the lower supporting plate are respectively rotatably connected to the adjacent rotating shaft, wherein the rotating mechanism is used to drive the upper supporting plate and the lower supporting plate to rotate around the rotating shaft.

[0022] Preferably, the two slide rails are fixedly installed on both sides of the lower frame, the two slide rail frames are slidably arranged on the two slide rails, and each pair of adjacent rollers are rotatably arranged on one slide rail frame.

[0023] The present invention has the following beneficial effects:

[0024] 1. By setting up airbags, the airbags are inflated to compress and adhere the sound-absorbing material. This can adapt to tires of different diameters and match different tread curvatures. It allows the airbags to fully and evenly contact all parts of the sound-absorbing material, applying pressure evenly. At the same time, it eliminates the need for multiple pressing of the sound-absorbing material and avoids the problem of adhesive not being able to penetrate the sound-absorbing material vertically in the rolling method.

[0025] 2. Once the airbag is fully inflated, it can continuously compress the sound-absorbing material, and the airbag and the sound-absorbing material are always in full contact. This allows for pressure holding of the sound-absorbing material from the beginning, with a long pressure holding time. Compared to roller pressing, since the roller does not need to roll around the tire, the pressing efficiency of the sound-absorbing material is greatly improved.

[0026] 3. By using a spreading device to spread the tire bead a certain distance before the airbag inflates and squeezes the sound-absorbing material, the airbag can expand horizontally to fully maintain pressure on the sound-absorbing material.

[0027] 4. By first using the spreading device to spread the tire bead, the expansion force of the airbag can be mainly applied to the sound-absorbing material on the inner wall of the tire, so that the adhesive on the outside of the sound-absorbing material can fully penetrate into the sound-absorbing material, thereby making the sound-absorbing material firmly attached to the inner wall of the tire.

[0028] 5. Use a spreading device to open the tire bead and then inflate the airbag. When dealing with wider tires, the airbag can be limited to allow it to expand laterally. When dealing with narrower tires, the bead can be clamped to allow the airbag to enter the tire after inflation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the bonding equipment used in the silent tire airbag pressing process proposed in this invention.

[0030] Figure 2 This is a schematic diagram of the lower half of the bonding device when the airbag is in a contracted state in this invention;

[0031] Figure 3 This is a schematic diagram of the lower half of the bonding device when the airbag is inflated in this invention.

[0032] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0033] Figure 5 for Figure 1 Enlarged schematic diagram of the structure at point B in the diagram;

[0034] Figure 6 for Figure 2 Enlarged schematic diagram of the structure at point C;

[0035] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point D;

[0036] Figure 8 This is a schematic diagram of the pressing component in the present invention, which compresses and adheres the noise-reducing material to the inner wall of the tire when the airbag inflates.

[0037] Figure 9 This is a schematic diagram of the structure of the lower half of the device when the upper and lower supporting plates of the supporting device are opened and flipped outward in this invention.

[0038] In the diagram: 1 Lower frame, 2 Upper frame, 3 Ball screw, 4 Servo motor, 5 Slide rail, 6 Tire, 7 Moving plate, 8 Bracket, 9 Lifting cylinder, 10 Screw nut, 11 Base plate, 12 Rolling rod, 13 Rolling plate, 14 Fixed hub, 15 Upper support plate, 16 Lower support plate, 17 Airbag, 18 Rotating shaft, 19 Rotating plate, 20 Slide plate, 21 Sound-absorbing material, 22 Slide rail, 23 Roller, 24 Support plate, 25 Synchronous pulley. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] A silent tire airbag pressing process includes the following steps:

[0042] S1. Tire conveying: The tire to be processed is conveyed by the conveying device to the base frame of the bonding equipment. Then, the base frame is lowered by the lifting device, exposing the support components and providing support for the tire; specifically, such as... Figure 2 , Figure 3 As shown, the tire 6 can be conveyed to the rolling plate 13 on the base frame by the electric roller 26. The tire 6 can then move forward along the rolling plate 13 to the middle of the base frame. Subsequently, the lifting cylinder 9 drives the base plate 11 to move down, so the rolling plate 13 no longer supports the tire 6. Instead, multiple supports 8 are exposed above the rolling plate 13, and the tire 6 will fall on the multiple supports 8.

[0043] S2. Tire positioning: Activate the positioning device of the bonding equipment to center the tire on the base frame, ensuring the tire's center is directly below the pressing component; for details, refer to... Figure 1The slide rails 5 on both sides can move synchronously towards each other along the slide rail 22. (In specific implementation, a telescopic cylinder and two synchronous pulleys can be installed on the lower frame 1. The two synchronous pulleys are connected by a synchronous belt, and the two slide rails 5 are fixedly connected to the synchronous belt. The telescopic end of the telescopic cylinder is fixedly connected to one of the slide rails 5. When the telescopic cylinder pulls the slide rail 5 to move, the slide rail 5 will also push the synchronous belt to move, and both synchronous pulleys will rotate. In this way, the other slide rail 5 connected to the synchronous belt will also move synchronously.) After the two slide rails 5 move to the designated position, the rollers 23 on the two slide rails 5 (two sets of four rollers 23 can be connected to one or two servos as shown in the figure to give them active force and better achieve the clamping and positioning function) can push the tire 6 directly under the pressing component to complete the tire positioning action so that the pressing component can accurately enter the center position of the tire.

[0044] S3. The pressing component moves down. Activating the second lifting device above the bonding equipment pushes the pressing component down to the center of the tire. In step S3, after the pressing component moves down, the horizontal center line of the fixed hub 14 in the pressing component must be aligned with the horizontal center line of the tire. Specifically, refer to... Figure 1 and Figure 4 The servo motor 4 can be started to drive one of the synchronous pulleys 25 to rotate. Under the action of the synchronous belt, all the connected synchronous pulleys 25 will rotate synchronously, and the ball screw 3 fixedly connected to the synchronous pulley 25 will rotate. This will cause the screw nut 10 to move down, and the screw nut 10 can push the lifting plate 27 to move down. The lifting plate 27 is fixedly connected to the moving plate 7 of the pressing component through the lifting column. Therefore, the lifting plate 27 can push the moving plate 7 down, so that the entire pressing component enters the center position of the tire 6.

[0045] S4. Open the tire bead and activate the opening device to flip the upper and lower opening plates outward, opening the tire bead a certain distance. The upper and lower opening plates of the tire bead can form a transition plate for tires of different rim diameters when the air bladder expands, ensuring the direction of air bladder inflation. In step S4, the spacing between the upper and lower opening plates of the opening device when they are opened can be customized according to the tire bead spacing.

[0046] Specifically, refer to the following when using the spreading device to spread it open. Figure 9 As shown, in addition, refer to Figure 8The upper support plate 15 and the lower support plate 16 are rotated around the pivot 18 by a rotating mechanism, causing them to flip outwards. This allows them to be inserted into the tire bezel of the tire 6 and expand the tire bezel. On the one hand, when dealing with smaller tires (such as tires around 15 inches), the tire bezel of the tire 6 can be enlarged to facilitate the smooth entry of the airbag 17 into the tire 6. On the other hand, when dealing with larger tires (such as tires around 20 inches), the upper and lower sides of the airbag 17 can be limited, allowing the airbag 17 to expand horizontally after inflation. This allows the expansion force of the airbag 17 to act mainly on the sound-absorbing material 21 on the inner wall of the tire 6, fully compressing and adhering the sound-absorbing material 21. This allows the adhesive on the outside of the sound-absorbing material 21 to fully penetrate into the sound-absorbing material 21, thus ensuring that the sound-absorbing material 21 is firmly adhered to the inner wall of the tire 6.

[0047] S5. Airbag inflation and compression: Gas at a certain pressure is injected into the airbag through an external air supply device (specifically, an air compressor with a control valve or other control air outlet mechanism, etc.), which causes the airbag to inflate. Under the limiting action of the expansion device, the airbag will expand laterally along the upper and lower expansion plates. The upper and lower expansion plates of the tire bead can form a transition plate for tires with different rim diameters when the airbag expands, so as to ensure the direction of the airbag inflation and expansion. When the outer wall of the airbag contacts the sound-absorbing material inside the tire, it can apply pressure evenly to the sound-absorbing material from all sides and maintain the pressure for a period of time, which can tightly press the adhesive on the outside of the sound-absorbing material to the inner wall of the tire, so that the sound-absorbing material is tightly and fully fixed on the inner wall of the tire.

[0048] The sound-absorbing materials used include sound-absorbing sponge and foam. It should be noted that, as per [reference]... Figure 1 and Figure 3 By setting up an airbag 17 and inflating it to compress and adhere to the sound-absorbing material 21, the airbag 17, due to its excellent shape matching ability, can easily adapt to tires 6 of different diameters, and thus match different tread curvatures. This allows the airbag 17 to fully and completely and evenly contact all parts of the sound-absorbing material 21 (e.g., Figure 8 As shown, after the airbag 17 expands and contacts the sound-absorbing material 21, it will be blocked by the sound-absorbing material 21 and the inner wall of the tire 6. The outer wall of the airbag 17 will gradually expand until it is fully in contact with all parts of the sound-absorbing material 21. Therefore, the pressure is uniform, and the airbag 17 expands in all directions at the same time, without squeezing the adhesive on the outside of the sound-absorbing material 21 forward or to the sides. This allows the adhesive to fully and vertically enter the sound-absorbing material 21 directly, increasing the strength of the bonded sound-absorbing material 21. Compared with the traditional pressing method, it does not require multiple pressing and does not have the problem of the adhesive not being able to penetrate vertically into the sound-absorbing material 21 in the rolling method.

[0049] Furthermore, after the airbag 17 is fully inflated, it can continuously compress the sound-absorbing material 21, and the airbag 17 is always in full contact with the sound-absorbing material 21. In this way, the sound-absorbing material 21 can be pressure-held from the beginning, and the pressure holding time is longer than that of the roller pressing method. At the same time, since there is no need for the roller to roll around the tire 6 once, the pressure holding time is the overall pressing time of the sound-absorbing material 21, thus greatly improving the pressing efficiency. For example, the roller pressing method takes 60-80 seconds to press the tire 6 once, and each area is only pressure-held for 1-2 seconds; but the airbag 17 can keep the sound-absorbing material 21 under pressure from the first second, that is, the efficiency is 30-40 times that of the roller pressing method.

[0050] S6. Airbag depressurization and contraction: By releasing the air inside the airbag, the airbag can contract to its initial state, thus separating the airbag from the tire to facilitate the next compression action; specifically, an external air supply device can be used to control the air intake and exhaust of the airbag 17. Before the airbag 17 completes contraction, the expansion device still supports the tire 6's bead to facilitate the contraction of the airbag 17.

[0051] S7. The spreading device is reset. The upper and lower spreading plates of the spreading device are rotated back to the vertical position and disengaged from the tire bead to facilitate the next tire bead spreading action.

[0052] S8. The base frame moves upward and resets, and the lifting device is restarted. The lifting device drives the base frame to move upward, so that the base frame supports the tire again, while the support components no longer support the tire. In this way, the tire with the sound-absorbing material applied can be transported out by the rolling plate on the base frame. Specifically, the lifting cylinder 9 drives the base plate 11 to move upward. At this time, the rolling plate 13 on the base plate 11 will be located on the upper side of each bracket 8. In this way, the rolling plate 13 will replace the bracket 8 to support the tire 6. Therefore, the rolling plate 13 can transport the tire 6 with the sound-absorbing material 21 applied on it out by rolling.

[0053] Reference Figures 1-8 The bonding equipment used in the above process steps consists of a lower frame 1, an upper frame 2, a base frame, a conveying device, a support assembly, a positioning device, a first lifting device, a second lifting device, and a pressing component. The pressing component consists of a spreading device and an airbag 17. The base frame includes a base plate 11, a rolling rod 12, and a rolling plate 13. The support assembly consists of multiple brackets 8. The first lifting device consists of two lifting cylinders 9. The second lifting device consists of a servo motor 4, multiple synchronous pulleys 25, a synchronous belt, a ball screw 3, a screw nut 10, and a lifting plate 27. The spreading device consists of a fixed hub 14, a moving plate 7, an upper spreading plate 15, a lower spreading plate 16, a rotating shaft 18, and a rotating mechanism. The positioning device consists of two slide rails 22, two slide rail frames 5, and four positioning rollers 23. The conveying device uses an electric roller 26, which is installed on the lower frame 1.

[0054] The upper frame 2 has four parts, which are welded at equal intervals to the corners of the lower frame 1. The lower end of the base plate 11 is fixedly connected to the telescopic end of the lifting cylinder 9. The lower end of the lifting cylinder 9 is fixedly installed on the side wall of the lower frame 1. There are multiple rolling rods 12, which are rotatably connected to the side wall of the base plate 11. There are multiple rolling plates 13, which are fixedly connected to the rolling rods 12 at equal intervals.

[0055] A support plate 24 is fixedly connected to the upper frame 2. Multiple synchronous pulleys 25 are rotatably mounted on the support plate 24. The servo motor 4 is fixedly mounted on the support plate 24. The output shaft of the servo motor 4 is fixedly connected to one of the synchronous pulleys 25. The ball screw 3 is fixedly connected to the synchronous pulley 26. The screw nut 10 is threadedly connected to the ball screw 3 and is fixedly connected to the lifting plate 27.

[0056] The lower end of the lifting plate 27 is fixedly connected to the moving plate 7 via multiple lifting columns 28. A fixed hub 14 is fixedly connected to the lower end of the moving plate 7. Multiple rotating shafts 18 are rotatably mounted on the circumferential sidewall of the fixed hub 14. Upper supporting plates 15 and lower supporting plates 16 are rotatably connected to adjacent rotating shafts 18. A rotating mechanism drives the upper supporting plates 15 and lower supporting plates 16 to rotate around the rotating shafts 18. (See reference [link to relevant documentation] for details.) Figure 8 As shown, the rotating mechanism can be a rotating plate 19 and a sliding plate 20 that are rotatably connected. The rotating plate 19 is fixedly connected to the upper supporting plate 15 (or the lower supporting plate 16), and the rotating plate 19 is rotatably connected to the rotating shaft 18. By installing components such as cylinders in the fixed hub 14, the sliding plate 20 is driven to move. This can lift or pull the sliding plate 20, causing the sliding plate 20 to rotate around the rotating shaft 18. The upper supporting plate 15 (or the lower supporting plate 16) that is fixedly connected to the sliding plate 20 will also rotate around the rotating shaft 18, completing the opening and retraction actions.

[0057] Two slide rails 22 are fixedly installed on both sides of the lower frame 1, and two slide rail frames 5 are slidably set on the two slide rails 22. Each pair of adjacent rollers 23 are rotatably set on one slide rail frame 5.

[0058] In summary, this invention utilizes the inflation of the airbag 17 to compress and adhere the sound-absorbing material 21. This allows it to adapt to tires 6 of different diameters and match different tread curvatures, ensuring that the airbag 17 makes full, complete, and uniform contact with all parts of the sound-absorbing material 21, applying even pressure. It also eliminates the need for repeated pressing of the sound-absorbing material 21 and avoids the problem of adhesive failing to penetrate vertically into the sound-absorbing material 21, as seen in roller pressing methods. Once the airbag 17 is fully inflated, it can continuously compress the sound-absorbing material 21, ensuring full contact between the airbag 17 and the sound-absorbing material 21 at all times. This allows for pressure maintenance of the sound-absorbing material 21 from the outset, and compared to roller pressing, the pressure maintenance time is longer. Furthermore, since there is no need for rollers to roll around the tire 6, the pressing efficiency is greatly improved.

[0059] Furthermore, by using the spreading device to spread the bead of the tire 6 a certain distance, and then inflating and compressing the airbag 17, the airbag 17 can expand horizontally to fully maintain the pressure of the sound-absorbing material 21; it can also make the expansion force of the airbag 17 mainly act on the sound-absorbing material 21 on the inner wall of the tire 6, so that the adhesive on the outside of the sound-absorbing material 21 can fully penetrate into the sound-absorbing material 21, thereby making the sound-absorbing material 21 firmly adhere to the inner wall of the tire 6.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A silent tire airbag pressing process, characterized in that, Includes the following steps: S1. Tire conveying: The tire to be processed is conveyed by the conveying device to the base frame of the bonding equipment. Then, the base frame is lowered by the lifting device to expose the support components and support the tire. S2. Tire positioning: Activate the positioning device of the bonding equipment to center the tire on the base frame so that the center of the tire is directly below the pressing component. S3. The pressing component moves down, and the second lifting device above the bonding equipment is activated, which can push the pressing component down to the center of the tire. S4. Open the tire bead, activate the opening device, so that the upper and lower opening plates of the opening device flip outward and open the tire bead a certain distance; S5. Airbag inflation and compression: Gas at a certain pressure is injected into the airbag through an external air supply device, which can inflate the airbag. Under the limiting action of the expansion device, the airbag will expand laterally along the upper and lower expansion plates. The upper and lower expansion plates of the tire bead can form a transition plate for tires with different rim diameters when the airbag expands, so as to ensure the direction of the airbag inflation and expansion. When the outer wall of the airbag contacts the sound-absorbing material inside the tire, it can apply pressure evenly to the sound-absorbing material around the perimeter and hold the pressure for a period of time. This can tightly press the adhesive on the outside of the sound-absorbing material to the inner wall of the tire, so that the sound-absorbing material is tightly and fully fixed to the inner wall of the tire. S6. Airbag depressurization and contraction: By releasing the air inside the airbag, the airbag can be contracted to its initial state, and a vacuum device is used to suck the airbag back a short distance, which will separate the airbag from the tire to facilitate the next pressing action. S7. The airbag uses the expansion device to reset. The upper and lower expansion plates of the expansion device rotate back to the vertical position and disengage from the tire bead to facilitate the next tire bead opening action. S8. The base frame moves up and resets, and the lifting device is started again. The lifting device drives the base frame to move up, so that the base frame supports the tire again, while the support component no longer supports the tire. In this way, the tire with the sound-absorbing material applied can be transported out by the rolling plate on the base frame. The bonding equipment used in the above process steps consists of a lower frame (1), an upper frame (2), a base frame, a conveying device, a support assembly, a positioning device, a first lifting device, a second lifting device, and a pressing component. The pressing component consists of a spreading device and an airbag (17). The base frame includes a base plate (11), a rolling rod (12), and a rolling plate (13). The support assembly consists of multiple brackets (8). The first lifting device consists of two lifting cylinders (9), and the second lifting device consists of a servo motor (4) and multiple... The device consists of a synchronous pulley (25), a synchronous belt, a ball screw (3), a screw nut (10), and a lifting plate (27). The opening device consists of a fixed hub (14), a moving plate (7), an upper opening plate (15), a lower opening plate (16), a rotating shaft (18), and a rotating mechanism. The positioning device consists of two slide rails (22), two slide rail frames (5), and four positioning rollers (23). The conveying device uses an electric roller (26), and the electric roller (26) is installed on the lower frame (1).

2. The silent tire airbag pressing process according to claim 1, characterized in that, In step S3, after the pressing component moves down, the horizontal center line of the fixed hub in the pressing component must be aligned with the horizontal center line of the tire.

3. The silent tire airbag pressing process according to claim 1, characterized in that, In step S4, the spacing between the upper and lower supporting plates of the supporting device when they are opened can be customized according to the tire bead spacing.

4. The silent tire airbag pressing process according to claim 1, characterized in that, In step S5, the sound-absorbing material is made of materials such as sound-absorbing sponge or foam.

5. The silent tire airbag pressing process according to claim 1, characterized in that, The upper frame (2) has four parts, which are welded at equal intervals to the corners of the lower frame (1). The lower end of the base plate (11) is fixedly connected to the telescopic end of the lifting cylinder (9). The lower end of the lifting cylinder (9) is fixedly installed on the side wall of the lower frame (1). There are multiple rolling rods (12) which are rotatably connected to the side wall of the base plate (11). There are multiple rolling pieces (13) which are fixedly connected to the rolling rods (12) at equal intervals.

6. The silent tire airbag pressing process according to claim 1, characterized in that, A support plate (24) is fixedly connected to the upper frame (2). Multiple synchronous pulleys (25) are rotatably mounted on the support plate (24). The servo motor (4) is fixedly mounted on the support plate (24). The output shaft of the servo motor (4) is fixedly connected to one of the synchronous pulleys (25). The ball screw (3) is fixedly connected to the synchronous pulley (26). The screw nut (10) is threaded onto the ball screw (3). The screw nut (10) is fixedly connected to the lifting plate (27).

7. The silent tire airbag pressing process according to claim 1, characterized in that, The lower end of the lifting plate (27) is fixedly connected to the moving plate (7) through multiple lifting columns (28). The fixed hub (14) is fixedly connected to the lower end of the moving plate (7). The rotating shaft (18) has multiple shafts and is rotatably arranged on the circumferential sidewall of the fixed hub (14). The upper supporting plate (15) and the lower supporting plate (16) are respectively rotatably connected to the adjacent rotating shaft (18). The rotating mechanism is used to drive the upper supporting plate (15) and the lower supporting plate (16) to rotate around the rotating shaft (18).

8. The silent tire airbag pressing process according to claim 1, characterized in that, The two slide rails (22) are fixedly installed on both sides of the lower frame (1), and the two slide rail frames (5) are slidably arranged on the two slide rails (22). Each pair of adjacent rollers (23) are rotatably arranged on one slide rail frame (5).

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