A method, system and use for applying strip-shaped sound-absorbing cotton to the inner wall of a tire

Abstract

The present invention provides a method and system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire, wherein the length of the sound-absorbing cotton is substantially equal to the inner circumference length of the tire, and the method comprises: placing the tire on a support that can drive the tire to rotate; providing a first glue coating device that can coat a layer of viscous rubber on the inner wall of the tire; providing a bonding component that drives the tire to rotate and cooperates with the bonding component to bond the sound-absorbing cotton to the viscous rubber on the inner wall of the tire; providing a joint arranging device that tightly connects the head and tail of the sound-absorbing cotton. The sound-absorbing cotton bonding method and system of the present invention improve the automation level of the sound-absorbing cotton bonding system and the sound-absorbing cotton bonding quality through automatic detection technology and active intelligent joint docking technology.

Description

Technical Field

[0001] The present invention relates to a manufacturing process for silent tires used in new energy vehicles such as electric vehicles, and more particularly to a method, system and use of applying strip-shaped sound-absorbing cotton to the inner wall of a tire to reduce the noise generated during the running of the tire. Background Art

[0002] New energy vehicles do not have engines and have low noise levels. However, traditional tires can no longer meet the needs of new energy vehicles for a quiet environment due to their high tire noise levels. In recent years, domestic and foreign tire manufacturers have been committed to the research and development of silent tires, and some car companies have equipped new energy vehicles with silent tires. However, when manufacturing tires, how to make silent materials that reduce tire noise, such as silent cotton, inside the tire is an unavoidable problem.

[0003] The laminating method disclosed in the Chinese patent document CN107107501A published by Xibo Automation Company on August 29, 2017 is to first use an inclined guide groove (6) to guide the anti-noise strip into the tire for laminating and compacting. However, the inclined guide groove has a complex structure, and once the anti-noise strip is blocked during transportation in the inclined guide groove, it is difficult to handle, and the spiral inclined guide groove is difficult to manufacture and has a high cost; in addition, the anti-noise strip is prone to slipping in the inclined guide groove, making it difficult to accurately position the anti-noise strip; and the overall device is large in size, and the energy consumption required for the operation of the device is high (electricity consumption, gas consumption, etc.).

[0004] In addition, the silent cotton laminating process proposed by Xibo Automation Company is: first center and fix the tire, then apply glue to the inner wall of the tire, and then drive the anti-noise strip by using a linear drive speed greater than the tire rotation speed to compress the strip, so that the length of the strip becomes less than the nominal length of the strip, thereby forming a gap between the two ends of the strip, so that after relaxation, the strip scrapes the adhesive device and re-places the adhesive device on the end, thereby causing the end to be fixed head and tail. However, this silent cotton laminating process has the following shortcomings:

[0005] 1. The internal stress of the anti-noise strip (i.e. the strip-shaped silent cotton) is insufficient, resulting in a certain distance a between the head and tail of the strip and the inability to close (such as the attached Figure 2A ), or only part of the sticky rubber 20 is scraped at the material head and material tail near the sticky rubber side, while the anti-noise strip away from the sticky rubber side has no sticky rubber (as shown in the attached Figure 2B In addition, during lamination, the head and tail of the material may overlap (as shown in the attached Figure 2C ), or there may be misalignment between the head and tail of the material (as shown in the attached Figure 2DAs shown), or one or more of the above situations occur simultaneously, resulting in failure to meet the process requirements for closing the head and tail of the material.

[0006] Second, when the anti-noise strip stretches and moves, a large amount of adhesive in front of it will be scraped away, resulting in serious glue shortage in some areas after the scraping, which is not conducive to the bonding of the anti-noise strip, or even if it can be bonded at present, it is easy to fall off during the subsequent tire rolling work.

[0007] In summary, how to apply strip-shaped silent cotton to the inner wall of the tire and make the material head and tail tightly connected has become a technical problem that technical personnel in the industry need to overcome. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire, wherein the length of the sound-absorbing cotton is substantially equal to the inner circumference length of the tire, and the method comprises: placing the tire on a support that can drive the tire to rotate; providing a first gluing device that can apply a layer of viscous rubber on the inner wall of the tire; providing a bonding component that drives the tire to rotate and cooperates with the bonding component to bond the sound-absorbing cotton to the viscous rubber on the inner wall of the tire; and providing a joint arranging device that tightly connects the head and tail of the sound-absorbing cotton through the joint arranging device.

[0009] Preferably, a detection device is provided. Before the joint arranging device tightly connects the material head and the material tail of the sound-absorbing cotton, the detection device detects the distance between the material head and the material tail of the sound-absorbing cotton, and then the joint arranging device automatically adjusts the position of the material head or the material tail according to the distance, thereby achieving a tight connection between the material head and the material tail of the sound-absorbing cotton.

[0010] Preferably, a second glue coating device is provided, and a layer of adhesive can be applied to the joint end surfaces of the head and / or tail of the sound-absorbing cotton before the sound-absorbing cotton is bonded to the sticky rubber material on the inner wall of the tire, during the process of bonding the sound-absorbing cotton to the sticky rubber material on the inner wall of the tire, or after bonding the sound-absorbing cotton to the sticky rubber material on the inner wall of the tire.

[0011] Preferably, before the sound-absorbing cotton is adhered to the sticky rubber material on the inner wall of the tire, the strip-shaped sound-absorbing cotton is first wound into a roll by the laminating assembly.

[0012] Preferably, a tire centering device is provided on the support, through which the centers of tires of different specifications and sizes can be set to the same position.

[0013] Preferably, the joint tidying device can move closer to or away from the sound-absorbing cotton.

[0014] Preferably, the joint arranging device can rotate and move with the tire center as the rotation point.

[0015] The present invention also discloses a system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire, comprising a support for receiving the tire, the support being provided with a driving device capable of driving the tire to rotate; a first gluing device for coating a layer of viscous rubber on the inner wall of the tire; and a fitting assembly for winding the strip-shaped sound-absorbing cotton into a roll, which also includes a joint finishing device for adjusting and ensuring that the head and tail of the sound-absorbing cotton are tightly connected.

[0016] Preferably, the joint arranging device is provided with a picking-up actuator for grabbing the head or tail of the sound-absorbing cotton.

[0017] Preferably, the picking actuator may be a needle suction cup structure, a vacuum cup adsorption structure, or a mechanical clamping structure.

[0018] Preferably, it also includes a detection device for detecting whether the joint end surfaces of the material head and the material tail of the sound-absorbing cotton are tightly connected, and the detection device can move synchronously with the joint arranging device.

[0019] Preferably, the detection device may be a visual camera or a radar detection device or an ultrasonic detection device.

[0020] Preferably, it also includes a second glue coating device for coating a layer of adhesive on the joint end surface of the material head and / or the material tail of the sound-absorbing cotton.

[0021] Preferably, the support is also provided with a tire centering device to accommodate tires of different specifications and sizes and to set the center of the tire to the same position.

[0022] The present invention also discloses a use of the aforementioned system for manufacturing a silent tire in which the combined end surfaces of the material head and the material tail of the sound-absorbing cotton are tightly connected.

[0023] The sound-absorbing cotton laminating method and system described in the present invention adopt automatic detection technology and active intelligent joint docking technology to improve the automation level and sound-absorbing cotton laminating quality of the sound-absorbing cotton laminating system, and can apply a layer of adhesive on the joint end surface of the material head and / or material tail of the sound-absorbing cotton before the material head and material tail of the sound-absorbing cotton are joined together to ensure that the material head and material tail have better laminating uniformity, thereby improving the strength of the adhesive joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 This is an overall schematic diagram of the tire inner wall after the sound-proofing cotton is attached in the prior art.

[0025] Attached Figure 2A For attachment Figure 1An enlarged schematic diagram of part A where the material head and tail are not closed.

[0026] Attached Figure 2B For attachment Figure 1 An enlarged schematic diagram showing that only part of the viscous rubber material is scraped off at the head and tail of part A.

[0027] Attached Figure 2C For attachment Figure 1 An enlarged schematic diagram of the overlap of the head and tail of part A.

[0028] Attached Figure 2D For attachment Figure 1 An enlarged schematic diagram of the misaligned docking of the material head and tail in part A.

[0029] Attached Figure 3 It is a schematic diagram of a bonding device provided with a bonding component.

[0030] Attached Figure 4 For attachment Figure 3 Schematic diagram of the center support and drive device.

[0031] Attached Figure 5 For attachment Figure 4 Schematic diagram from another perspective.

[0032] Attached Figure 6 Schematic diagram of sound-absorbing cotton placed vertically on the tire.

[0033] Attached Figure 7 This is a schematic diagram of a detection device detecting the docking condition of the head and tail of the sound-absorbing cotton material in a tire.

[0034] Attached Figure 8 This is a schematic diagram of the second glue coating device coating adhesive on the end surface of the material head and / or the material tail.

[0035] Attached Fig. 9 A schematic diagram of a joint arrangement device.

[0036] Attached Fig.10 The diagram is a schematic diagram of the action of the joint arrangement device actively arranging the material head and the material tail so that the material head and the material tail are tightly connected. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0038] See attached Figures 3 to 8As shown, the present invention discloses a method for applying a strip-shaped sound-absorbing cotton 30 to the inner wall of a tire 10. The tire specifications and sizes are not limited. The length of the sound-absorbing cotton 30 is substantially equal to the inner circumference length of the tire 10. For example, if the inner circumference length of the tire 10 is X cm, the length of the sound-absorbing cotton 30 ranges from X cm to X+2 cm. The method of the present invention comprises: placing the tire 10 on a support that can drive the tire to rotate manually or automatically by mechanical equipment; providing a first glue coating device (not shown) that can coat a layer of viscous rubber 20 on the inner wall of the tire 10; providing a bonding component that drives the tire 10 to rotate and cooperates with the bonding component to bond the sound-absorbing cotton 30 to the viscous rubber 20 on the inner wall of the tire 10; and providing a joint finishing device 70, through which the material head 30B and the material tail 30A of the sound-absorbing cotton 30 are actively connected tightly to meet the bonding process requirements of the tire sound-absorbing cotton.

[0039] The present invention may also provide a detection device 80, before the joint arrangement device 70 tightly connects the material head 30B and the material tail 30A of the sound-absorbing cotton 30, the detection device 80 detects the distance between the material head and the material tail of the sound-absorbing cotton 30 (the distance here may be the distance between the material head and the material tail in the background art). Figures 2A to 2D The situation where one or more of the above-mentioned situations occur simultaneously is not limited to the concept of spacing in the traditional sense), and then the joint sorting device 70 automatically adjusts the position of the material head or the material tail according to the situation of the spacing, so as to achieve a tight connection between the material head and the material tail of the sound-absorbing cotton.

[0040] In order to further improve the bonding strength of the material head or material tail, the present invention can also provide a second glue coating device 40. Before the sound-absorbing cotton 30 is attached to the viscous rubber material on the inner wall of the tire 10, or during the process of attaching the sound-absorbing cotton 30 to the viscous rubber material on the inner wall of the tire 10, or after attaching the sound-absorbing cotton 30 to the viscous rubber material on the inner wall of the tire 10, a layer of adhesive 50 can be applied to at least one of the end face of the material head 30B of the sound-absorbing cotton 30, the end face of the material tail 30A, or the end face where the material head and the material tail meet, so as to tightly bond the adjusted material head and the material tail together. The active bonding method described in the present invention can solve the problem of the prior art that the material head and the material tail are attached. Figures 2A to 2B One or more technical problems caused by the passive bonding method between the head and tail of the material shown.

[0041] In addition, the present invention can first wind the strip-shaped sound-absorbing cotton 30 into a roll through the bonding component before bonding the sound-absorbing cotton 30 to the sticky rubber on the inner wall of the tire 10, and then unwind it to bond the sound-absorbing cotton to the inner wall of the tire. Among them, the specific structure and principle of the bonding component can be referred to the applicant's prior invention patent technology content No. 202110719867.2. Among them, the joint finishing device 70 can be a process of an independent structure, or it can be directly arranged on the bonding device 100. Of course, it can also be a bonding component with other bonding methods.

[0042] The sound-absorbing cotton laminating method of the present invention can be applied to two situations: a tire is placed vertically for laminating or a tire is placed horizontally for laminating. When the tire is placed horizontally for laminating, the present invention can set a tire centering device on the support, and the center of tires of different specifications and sizes can be set to the same position by the tire centering device before subsequent operations are performed. When the tire is placed vertically for laminating, there is no need to set a tire centering device.

[0043] The joint arranging device of the present invention is provided with a picking-up actuator, and the joint arranging device can be moved close to or away from the sound-absorbing cotton to move the picking-up actuator close to or away from the head or tail of the sound-absorbing cotton to adjust the positional relationship between the head and the tail, thereby achieving the purpose of tightly connecting the head and the tail of the sound-absorbing cotton.

[0044] The joint arranging device can also rotate and move with the tire center as the rotation point or move in the radial direction of the tire, and the tire can be lifted or rotated by the support, and then cooperate with the joint arranging device to complete the movement of the picking actuator close to or away from the head or tail of the sound-absorbing cotton, so as to adjust the positional relationship between the head and the tail, thereby achieving the purpose of tightly connecting the head and the tail of the sound-absorbing cotton.

[0045] Embodiment 1, as attached Figure 3 To Attachment Figure 5 With attached Fig. 9As shown, the present invention also discloses a system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire, comprising a support 60 for receiving a tire, the support 60 is provided with a lifting mechanism 101 that can drive the tire 10 to move up and down, and a driving device 102 that can drive the tire 10 to rotate, the support 60 is also provided with a tire centering device 90 to adapt to tires of different specifications and sizes and set the center of the tire to the same position for laminating the sound-absorbing cotton; a first glue coating device (not shown) for coating a layer of viscous glue on the inner wall of the tire; a laminating component 103 for winding the strip-shaped sound-absorbing cotton into a roll, and also includes a joint finishing device 70 for adjusting and ensuring that the material head 30B and the material tail 30A of the sound-absorbing cotton 30 are tightly connected. Among them, the joint finishing device 70 can be provided with a picking actuator 71 for grabbing the material head or material tail of the sound-absorbing cotton, and the picking actuator 71 can include a needle suction cup structure or a vacuum cup adsorption structure or a mechanical clamping structure.

[0046] In addition, the system of the present invention further includes a detection device 80, which can move synchronously or asynchronously with the picking actuator 71, and is used to detect whether the joint end surfaces of the material head and the material tail of the sound-absorbing cotton are tightly connected. The detection device can be a visual camera or a radar detection device or an ultrasonic detection device. The system of the present invention further includes a second glue coating device 40 for coating a layer of adhesive 50 on the joint end surfaces of the material head and / or the material tail of the sound-absorbing cotton 30.

[0047] Embodiment 2, as attached Figure 6 As shown, in the case where the tire 10 is placed vertically, in the system of applying the strip-shaped sound-absorbing cotton to the inner wall of the tire according to the present invention, the support can be a power roller 60A for receiving the tire and providing rotational force to the tire, and the tire 10 is supported and fixed by multiple power rollers 60A, and power is provided by one or more of the power rollers 60A to drive the tire to rotate. At this time, the tire does not need a tire centering device to center the tire, and a layer of viscous rubber can also be applied to the inner wall of the tire by the first glue coating device, and the strip-shaped sound-absorbing cotton is wound into a roll by the bonding component and bonded to the viscous rubber on the inner wall of the tire, and the joint finishing device is used to adjust and ensure that the head and tail of the sound-absorbing cotton are tightly connected.

[0048] The specific working principle of the present invention is as follows: Figure 7 , Attachment Fig. 9 With attached Fig.10As shown, the detection device 80 enters the hollow part of the middle of the tire 10 and faces the inner wall of the tire, scans and detects the distribution of the material head 30B and the material tail 30A of the sound-absorbing cotton 30 (which may be one or more of the conditions shown in Figure 2 in the prior art), and uploads the data to the system for data analysis, and then drives the joint arrangement device 70 to adjust the material head and the material tail of the sound-absorbing cotton to a tightly connected state. The following is only an example of a certain distance between the material head 30B and the material tail 30A of the sound-absorbing cotton 30. As shown in Figure 2 Fig.10 As shown, the pick-up actuator 71 grabs the material head 30B and lifts it up and moves it to the material tail 30A to make the two tightly connected, and then the pick-up actuator 71 presses down the material head 30B to make it fully bonded with the viscous rubber material, and then the pick-up actuator 71 is reset. In this way, the material head 30B and the material tail 30A of the sound-absorbing cotton 30 are actively connected.

[0049] The sound-absorbing cotton laminating method and system described in the present invention adopt automatic detection technology and active intelligent joint docking technology to improve the automation level and sound-absorbing cotton laminating quality of the sound-absorbing cotton laminating system, and can apply a layer of adhesive on the joint end surface of the material head and / or material tail of the sound-absorbing cotton before the material head and material tail of the sound-absorbing cotton are joined together to ensure that the material head and material tail have better laminating uniformity, thereby improving the strength of the adhesive joint.

[0050] The above contents are only some implementation methods of the present application, and their purpose is to illustrate the technical concept and features of the present application. Any equivalent changes or replacement technical solutions that can be easily thought of by any person skilled in the art under the inspiration of the technical content of the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for applying a strip of sound-absorbing cotton to the inner wall of a tire, wherein the length of the sound-absorbing cotton is substantially equal to the inner circumference length of the tire, the method comprising: Place the tire on a support that can drive the tire to rotate; A first glue coating device is provided, which can coat a layer of viscous rubber on the inner wall of the tire; Providing a laminating component, driving the tire to rotate and cooperating with the laminating component to laminat the sound-absorbing cotton onto the sticky rubber material on the inner wall of the tire; A joint arranging device is provided, wherein the joint arranging device is provided with a picking-up actuator for grabbing the head or tail of the sound-absorbing cotton, and the head and tail of the sound-absorbing cotton are tightly connected through the joint arranging device; A detection device is provided, which can move synchronously or asynchronously with the picking actuator. Before the joint arranging device tightly connects the material head and the material tail of the sound-absorbing cotton, the detection device detects the distance between the material head and the material tail of the sound-absorbing cotton, and then the joint arranging device automatically adjusts the position of the material head or the material tail according to the distance, thereby achieving tight connection between the material head and the material tail of the sound-absorbing cotton.

2. The method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 1, characterized in that: A second glue coating device is provided. Before the sound-absorbing cotton is bonded to the sticky rubber material on the inner wall of the tire, or during the process of bonding the sound-absorbing cotton to the sticky rubber material on the inner wall of the tire, or after bonding the sound-absorbing cotton to the sticky rubber material on the inner wall of the tire, a layer of adhesive can be coated on the joint end surface of the head and / or tail of the sound-absorbing cotton by the glue coating device.

3. The method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 1, characterized in that: Before the sound-absorbing cotton is attached to the sticky rubber material on the inner wall of the tire, the strip-shaped sound-absorbing cotton is firstly wound into a roll by the attaching assembly.

4. The method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 1, characterized in that: A tire centering device is arranged on the support, and the centers of tires of different specifications and sizes can be set to the same position through the tire centering device.

5. The method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 1, characterized in that: The joint arrangement device can be moved closer to or away from the sound-absorbing cotton.

6. The method for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 1, characterized in that: The joint arrangement device can rotate and move with the tire center as the rotation point.

7. A system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire, comprising a support for receiving the tire, the support being provided with a driving device capable of driving the tire to rotate; a first glue coating device for coating a layer of viscous glue on the inner wall of the tire; and a laminating assembly for winding the strip-shaped sound-absorbing cotton into a roll, characterized in that: It also includes a joint arranging device for adjusting and ensuring that the head and tail of the sound-absorbing cotton are tightly connected. The joint arranging device is provided with a picking actuator for grabbing the head or tail of the sound-absorbing cotton, and a detection device for detecting whether the joint end surfaces of the head and tail of the sound-absorbing cotton are tightly connected by detecting the distance between the head and tail of the sound-absorbing cotton. The detection device can move synchronously or asynchronously with the picking actuator.

8. The system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 7, characterized in that: The pick-up actuator may include a needle suction cup structure, a vacuum cup adsorption structure, or a mechanical clamping structure.

9. The system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 7, characterized in that: The detection device may be a visual camera or a radar detection device or an ultrasonic detection device.

10. The system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 7, characterized in that: It also includes a second glue coating device for coating a layer of adhesive on the joint end surface of the material head and / or the material tail of the sound-absorbing cotton.

11. The system for applying strip-shaped sound-absorbing cotton to the inner wall of a tire according to claim 7, characterized in that: The support is also provided with a tire centering device to adapt to tires of different specifications and sizes and to set the centers of the tires to the same position.

12. Use of the system according to any one of claims 7 to 11 for manufacturing a silent tire in which the joint end surfaces of the head and tail of the sound-absorbing cotton are tightly connected.

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