CN115782470A

CN115782470A - Self-sealing tire and preparation process thereof

Info

Publication number: CN115782470A
Application number: CN202211589290.9A
Authority: CN
Inventors: 童斌; 张毅
Original assignee: Rockyo Shanghai New Material Technology Co ltd
Current assignee: Rockyo Shanghai New Material Technology Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-03-14

Abstract

The invention relates to the technical field of tires, in particular to a self-sealing tire and a preparation process thereof. The invention can avoid the phenomenon that two sides of the coating are thin and the middle is thick when the liquid leakage-proof close-filling colloid is sprayed, ensure the leakage-proof effect, and can carry out primary drying on the sprayed colloid when the spraying is carried out, reduce the phenomenon that the close-filling colloid flows when the tire is moved subsequently, and reduce the phenomenon of uneven distribution.

Description

Self-sealing tire and preparation process thereof

Technical Field

The invention relates to the technical field of tires, in particular to a self-sealing tire and a preparation process thereof.

Background

A self-sealing tyre features that a layer of adhesive is put on the inner surface of air-tight layer along the crown of tyre or the adhesive is put in porous rubber, and when the tyre is perforated slightly, the adhesive fills up and blocks the small hole under the action of internal pressure, so the tyre can run continuously for a long distance.

For example, patent No. CN20199088378.4, includes a tire, the inner wall of the tire is provided with an anti-leak patch layer, and the anti-leak patch layer is adhered on the inner wall of the tire; the leak-proof dense-patch layer comprises the following components in parts by weight: 35-45 parts of modified rubber polymer, 9-15 parts of terpene resin, 15-20 parts of petroleum resin, 9-15 parts of naphthenic oil, 20-25 parts of wax, 0.5 part of antioxidant, 5 parts of pigment and 2 parts of coupling agent.

Although the patent can lead the leak-proof compact patch layer to tightly wrap the sharp object when the tire is penetrated by the sharp object in the running process of the automobile, thereby having the leak-proof effect; when a sharp object is pulled out, the broken opening of the leak-proof sealing layer can be automatically closed, the leak-proof sealing layer at the broken opening is adhered by viscosity, the puncture-proof sealing layer can not only have the puncture-proof and leak-proof effects, but also has the effect of buffering tire burst, but when the sealing rubber material is sprayed, the phenomenon that the two sides of the coating are thin and the middle of the coating is thick is easy to occur, the leak-proof effect is reduced, meanwhile, the sprayed tire needs to be moved to a cooling area for cooling, and in the moving process, the sealing rubber material easily flows under the action of gravity, so that the phenomenon of uneven distribution is further caused, and the production quality is reduced.

Disclosure of Invention

The invention aims to provide a self-sealing tire and a preparation process thereof, which aim to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a self sealss tire, includes tire and preparation facilities, the tire outside-in is high strength wear-resisting rubber, articulamentum, coating, buffer layer, leak protection close-up layer and airtight layer in proper order.

As a preferable scheme of the invention, the anti-leakage and anti-mending layer is composed of the following raw materials:

toluene, butyl rubber, acrylic acid, a catalyst, a softener, a filler antioxidant, a resin, propinyl methacrylate, methacrylamide and an initiator.

According to the above self-sealing tyre, there will also be provided a process for the preparation of a self-sealing tyre, comprising the steps of:

step one, cleaning the inner wall of a tire;

step two, preparing liquid colloid for the leak-proof and repair layer by using a preparation device, and laminating the connecting layer, the coating layer and the buffer layer on the inner wall of the cleaned tire in sequence;

and step three, putting the pressed tire into a preparation device, spraying the prepared liquid colloid on the inner wall of the tire, simultaneously carrying out simple drying treatment to form an anti-leakage airtight layer, finally taking down the tire, and pressing the airtight layer to complete the preparation of the self-sealing tire.

According to a preferable scheme of the invention, the preparation device comprises a spraying box and a colloid preparation box, the colloid preparation box is welded on the outer wall of the spraying box, a stirring rod is arranged inside the colloid preparation box, a working cavity is formed in one side, away from the colloid preparation box, of the spraying box, a groove is formed in the bottom plate of the working cavity, a driving assembly is arranged in the groove and comprises rotating rollers symmetrically arranged in the groove, tires are placed above the two rotating rollers, a fixing block is vertically arranged in the center of the inner wall of the working cavity and penetrates through the hollow portion of the tires, the spraying assembly is arranged on the lower surface of the end portion of the fixing block and comprises a moving plate, a spraying plate and a drying block are respectively arranged on two sides of the long edge of the lower surface of the moving plate, a pump body is arranged on one side inside the fixing block, a liquid pumping pipe and a liquid conveying pipe are respectively connected to the two ends of the fixing block in a sealing mode, the liquid conveying pipe extends into the colloid preparation box, the liquid conveying pipe is connected to the spraying assembly through a telescopic pipe, a lifting assembly is arranged on one side, and the inside of the fixing block is connected to the upper surface of the moving plate.

According to the preferable scheme of the invention, a driving and stirring motor is installed at the bottom of the colloid preparation box, the output end of the stirring motor is fixedly connected with a stirring rod, the port of the liquid pumping pipe is close to the inner bottom plate of the colloid preparation box, the heating sheet is installed on the inner wall of the colloid preparation box, and a supporting leg is fixed on one side of the lower surface of the colloid preparation box, which is far away from the spraying box, through a bolt.

As a preferable scheme of the invention, a protective shell is welded on the outer wall of the spraying box below the colloid preparation box, driving wheels are symmetrically arranged inside the protective shell, driving belts are meshed with the two driving wheels, the two driving wheels are respectively fixedly sleeved on rotating shafts, one ends of the two rotating shafts penetrate through the box wall of the spraying box, extend into the groove and are movably connected with the inner wall of the spraying box, the two rotating rollers are fixedly sleeved on the outer wall of the rotating shafts, and a speed reduction motor is fixedly installed at the end part of one rotating shaft close to the driving wheels and is installed on the inner wall of the protective shell through bolts.

As a preferable scheme of the invention, the lifting assembly comprises a lifting motor installed inside a fixed block, a containing groove is formed in the fixed block below the lifting motor, the output end of the lifting motor is connected with a rotating rod, the end of the rotating rod penetrates out of the containing groove and is welded with a threaded block, a sleeve is sleeved on the rotating rod, the inner wall of the sleeve is in threaded engagement with the threaded block, the diameter of the sleeve is smaller than that of the containing groove, telescopic rods are installed at both ends inside the fixed block, and the telescopic ends of the two telescopic rods and the end of the sleeve are fixedly connected with the movable plate.

As a preferable scheme of the invention, a plurality of nozzles are respectively arranged on two side walls and the bottom of the spraying plate, drying lamps are symmetrically arranged on two side walls and the bottom of the drying block, and the telescopic pipe penetrates through the moving plate and is communicated with the inside of the spraying plate.

According to the preferable scheme of the invention, the centers of two side walls of the working cavity are respectively provided with a containing groove, two containing grooves are respectively provided with a limiting component, the two limiting components comprise U-shaped blocks, the two U-shaped blocks are movably arranged in the containing grooves, the distance between the openings of the two U-shaped blocks is larger than the width of a tire, two side walls of the spraying box are respectively provided with an electric telescopic cylinder through bolts, and the telescopic ends of the two electric telescopic cylinders extend into the containing grooves and are respectively fixedly connected with the outer walls of the two U-shaped blocks.

As the preferable scheme of the invention, a plurality of balls are movably arranged on the inner walls of the openings of the two U-shaped blocks, and each ball is contacted with the outer wall of the side edge of the tire.

Compared with the prior art, the invention has the beneficial effects that: aiming at the problems brought forward by the background technology, the invention can avoid the phenomenon that the two sides of the coating are thin and the middle is thick when the liquid leakage-proof close-compensation colloid is sprayed, so as to ensure the leakage-proof effect, and can carry out primary drying on the sprayed colloid while spraying, so that the phenomenon that the close-compensation colloid flows when the tire is moved subsequently is reduced, and the phenomenon of uneven distribution is reduced;

toluene, butyl rubber, acrylic acid, a catalyst, a softener, an antioxidant filler, resin, propinyl methacrylate, methacrylamide and an initiator are placed into a colloid preparation box, a stirring motor works to drive a stirring rod to rotate to stir raw materials to obtain liquid leakage-proof close colloid, a heating sheet is started to raise the temperature to 60 ℃ while stirring, the liquid colloid can be prevented from being solidified, then a tire is placed into a working cavity to be vertically arranged on two rotating rollers, an electric telescopic cylinder in a limiting assembly works to push a U-shaped block to move out of a containing tank so that a U-shaped opening is sleeved on the side of the tire to limit the tire, then a spraying assembly moves to the inner wall of the tire under the work of a lifting assembly, a speed reducing motor in the driving assembly works slowly to drive a rotating shaft connected with leakage-proof rotating, the rotating shaft drives a driving wheel to rotate, the driving wheel drives another driving wheel to rotate through a driving belt, the two rotating shafts drive the two rotating rollers to rotate, the rotating rollers enable the tire to roll slowly, the work of the pump body sends prepared liquid colloid into the inner wall of the spraying assembly through a liquid pumping pipe and sprays the inner wall of the spraying assembly to rotate from the two rotating shafts, the rotating shafts to drive wheels, and the inner wall of the spraying assembly to dry the inner wall of the spraying assembly until the spraying assembly is uniform thickness is reduced by 5 mm, and the inner wall of a spraying nozzle is dried.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is an overall side cross-sectional block diagram of the present invention;

FIG. 3 is a schematic view of a spray assembly of the present invention;

FIG. 4 is a cross-sectional view of a mounting block and spray assembly of the present invention;

FIG. 5 is a schematic view of a stop assembly of the present invention;

FIG. 6 is a top view of the driving assembly of the present invention.

In the figure: 1. a spraying box; 101. a working chamber; 1011. a groove; 1012. accommodating grooves; 2. a tire; 3. a colloid preparation box; 301. supporting legs; 302. a stirring rod; 303. a heating plate; 304. a stirring motor; 4. a drive assembly; 401. a rotating roller; 402. a rotating shaft; 403. a driving wheel; 404. a transmission belt; 405. a reduction motor; 406. a protective shell; 5. a fixed block; 501. a transfusion tube; 502. a liquid pumping pipe; 503. a receiving groove; 504. a pump body; 6. a lifting assembly; 601. a lifting motor; 602. rotating the rod; 603. a thread block; 604. a sleeve; 605. a telescopic rod; 7. a spray assembly; 701. moving the plate; 702. spraying a plate; 7021. a spout; 703. drying the blocks; 7031. a drying lamp; 704. a telescopic pipe; 8. a limiting component; 801. a U-shaped block; 8011. a ball bearing; 802. an electric telescopic cylinder; 9. and (5) preparing the device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-6, the present invention provides a technical solution:

the utility model provides a self sealss tire, includes tire 2 and preparation facilities 9, and tire 2 outside-in is high strength wear-resisting rubber, articulamentum, coating, buffer layer, leak protection layer and airtight layer in proper order, and wherein leak protection layer comprises following raw materials:

Toluene, butyl rubber, acrylic acid, a catalyst, a softener, a filler antioxidant, resin, propinyl methacrylate, methacrylamide and an initiator are placed in a colloid preparation box 3, and the temperature is raised to 60 ℃ while stirring, so that the solidification of liquid colloid can be avoided.

According to the above embodiments, there will also be provided a process for the preparation of a self-sealing tyre, comprising the following steps:

step one, cleaning the inner wall of the tire 2;

step two, preparing liquid colloid for the leak-proof layer by using a preparation device 9, and pressing the connecting layer, the coating layer and the buffer layer in sequence on the inner wall of the cleaned tire 2;

step three, the pressed tyre 2 is placed into a preparation device 9, so that the prepared liquid colloid is sprayed on the inner wall of the tyre and is simply dried to form an anti-leakage airtight layer, and finally the tyre 2 is taken down to press the airtight layer, so that the preparation of the self-sealing tyre is completed.

The electrical components in the preparation device 9 are controlled by a control panel arranged on the outer wall.

In the embodiment, referring to fig. 1, 2 and 5, the preparation apparatus 9 includes a spraying box 1 and a colloid preparation box 3, the colloid preparation box 3 is welded on the outer wall of the spraying box 1, a stirring rod 302 is disposed inside the colloid preparation box 3, a driving stirring motor 304 is mounted at the bottom of the colloid preparation box 3, the output end of the stirring motor 304 is fixedly connected with the stirring rod 302, the port of the liquid pumping pipe 502 is close to the inner bottom plate of the colloid preparation box 3, a heating plate 303 is mounted on the inner wall of the colloid preparation box 3, a supporting leg 301 is fixed on one side of the lower surface of the colloid preparation box 3 away from the spraying box 1 by a bolt, a working cavity 101 is formed on one side of the spraying box 1 away from the colloid preparation box 3, a groove 1011 is formed on the bottom plate of the working cavity 101, a driving assembly 4 is disposed in the groove 1011, the driving assembly 4 includes rotating rollers 401 symmetrically disposed in the groove 1011, a tire 2 is disposed above the two rotating rollers 401, a fixed block 5 is vertically arranged at the center of the inner wall of the working cavity 101, the fixed block 5 penetrates through the hollow part of the tire 2, a spraying component 7 is arranged on the lower surface of the end part of the fixed block 5, the spraying component 7 comprises a moving plate 701, a spraying plate 702 and a drying block 703 are respectively arranged on two sides of the long side of the lower surface of the moving plate 701, a plurality of nozzles 7021 are respectively arranged on two side walls and the bottom of the spraying plate 702, drying lamps 7031 are symmetrically arranged on two side walls and the bottom of the drying block 703, a pump body 504 is arranged on one side inside the fixed block 5, a liquid pumping pipe 502 and a liquid conveying pipe 501 are respectively connected with two ends of the pump body 504 in a sealing manner, the liquid pumping pipe 502 extends to the inside of the colloid preparation box 3, the liquid conveying pipe 501 is connected with the spraying component 7 through a telescopic pipe 704, a lifting component 6 is arranged on one side of the inside of the fixed block 5, and the execution end of the lifting component 6 is connected with the upper surface of the moving plate 701, holding tank 1012 has all been seted up to both sides wall central authorities department of working chamber 101, all be equipped with spacing subassembly 8 in two holding tanks 1012, two spacing subassemblies 8 include U-shaped piece 801, two U-shaped piece 801 activities set up in holding tank 1012, the interval of the opening part of two U-shaped pieces 801 is greater than the width of tire 2, electronic telescoping cylinder 802 is all installed through the bolt to the both sides wall of spraying case 1, the flexible end of two electronic telescoping cylinder 802 extends to in the holding tank 1012 and respectively with two U-shaped piece 801 outer wall fixed connection, the equal movable mounting of opening part inner wall of two U-shaped pieces 801 has a plurality of balls 8011, every ball 8011 all contacts with the side outer wall of tire 2, wherein ball 8011 is convenient for tire 2 and rolls the operation.

After the raw materials are put into the colloid preparation box 3, the stirring motor 304 works to drive the stirring rod 302 to rotate to stir the raw materials to obtain liquid leakproof colloid, the heating sheet 303 is started to raise the temperature to 60 ℃ while stirring, the solidification of the liquid colloid can be avoided, then the tire 2 is put into the working cavity 101 to be vertically arranged on the two rotating rollers 401, at the moment, the electric telescopic cylinder 802 in the limiting component 8 works to push the U-shaped block 801 to move out of the accommodating groove 1012, so that the U-shaped opening is sleeved on the side of the tire 2 to limit the tire, then the spraying plate 702 and the drying block 703 of the spraying component 7 move to the inner wall of the tire 2 under the work of the lifting component 6, the driving component 4 works to enable the two rotating rollers 401 to slowly rotate in the same direction to drive the tire 2 to roll, at the moment, the pump body 504 and the drying lamp 7031 work, the pump body 504 sends the liquid colloid in the colloid preparation box 3 into the spraying plate 702 through the liquid suction pipe 502 and the liquid conveying pipe 501 and sprays the liquid colloid to the inner wall of the tire 2 from the nozzle 7021, wherein the flow rate is 60g/s, the working pressure is 6Mpa, all the inner walls of the tire 2 can be sprayed under the slow rolling of the tire 2, the sprayed colloid moves to the drying lamp 7031 under the rotation of the tire 2 for preliminary drying, then the spraying and drying steps are circulated until the colloid forms an anti-leakage tight-compensation layer with the thickness of 5-9mm, so that when the liquid anti-leakage tight-compensation colloid is sprayed, the phenomenon that the two sides of the coating are thin and the middle is thick is avoided, the anti-leakage effect is ensured, the sprayed colloid can be preliminarily dried while the spraying is performed, when the subsequent tire moving is reduced, the flowing phenomenon of the tight-compensation colloid occurs, and the phenomenon of uneven distribution is reduced.

In an embodiment, referring to fig. 2 and fig. 6, a protective shell 406 is welded on the outer wall of the spraying box 1 below the colloid preparation box 3, driving wheels 403 are symmetrically arranged inside the protective shell 406, a driving belt 404 is installed on the two driving wheels 403 in a meshing manner, the two driving wheels 403 are fixedly sleeved on a rotating shaft 402 respectively, one ends of the two rotating shafts 402 extend into a groove 1011 through the box wall of the spraying box 1 and are movably connected with the inner wall of the groove, the two rotating rollers 401 are fixedly sleeved on the outer wall of the rotating shaft 402, a speed reduction motor 405 is fixedly installed at the end of one rotating shaft 402 close to the driving wheels 403, and the speed reduction motor 405 is installed on the inner wall of the protective shell 406 through bolts.

The speed reducing motor 405 in the driving assembly 4 works slowly to drive the connected rotating shafts 402 to rotate, the rotating shafts 402 drive the installed driving wheels 403 to rotate, the driving wheels 403 drive the other driving wheels 403 to rotate through the meshed driving belts 404, so that the two rotating shafts 402 rotate synchronously in the same direction, the two rotating shafts 402 drive the two rotating rollers 401 to rotate, and the rotating rollers 401 enable the tire 2 to roll slowly, thereby facilitating the spraying and drying operations.

In an embodiment, please refer to fig. 3 and 4, the lifting assembly 6 includes a lifting motor 601 installed inside the fixed block 5, a storage groove 503 is formed inside the fixed block 5 and located below the lifting motor 601, an output end of the lifting motor 601 is connected with a rotating rod 602, an end portion of the rotating rod 602 penetrates through the storage groove 503 and is welded with a threaded block 603, a sleeve 604 is sleeved on the rotating rod 602, an inner wall of the sleeve 604 is in threaded engagement with the threaded block 603, a diameter of the sleeve 604 is smaller than that of the storage groove 503, telescopic rods 605 are installed at two ends inside the fixed block 5, telescopic ends of the two telescopic rods 605 and end portions of the sleeve 604 are both fixedly connected with the moving plate 701, and the telescopic tubes 704 penetrate through the moving plate 701 and are communicated with the inside of the spraying plate 702.

Lifting motor 601 among the lifting unit 6 work and drive dwang 602 rotatory, rotatory dwang 602 drives the screw thread piece 603 rotatory, sleeve 604 carries out vertical migration along with the rotation of screw thread piece 603 in the restriction of telescopic link 605 this moment, the sleeve 604 that removes drives spraying assembly 7 and moves to the inner circle limit department of tire 2, 1mm department until the movable plate 701 is in the tire 2 inner circle limit, the flexible length of telescopic link 605 reaches the biggest, lifting motor 601 stop work, thereby be convenient for realize the spraying operation to the tire 2 inner wall.

The working process of the invention is as follows: cleaning the inner wall of a tire 2, then preparing liquid colloid for an anti-leakage layer by using a preparation device 9, putting the raw materials into a colloid preparation box 3, driving a stirring rod 302 to rotate by the operation of a stirring motor 304 to stir the raw materials to obtain the liquid anti-leakage colloid, heating a heating plate 303 to raise the temperature to 60 ℃ while stirring, so as to avoid the solidification of the liquid colloid, pressing a connecting layer, a coating layer and a buffer layer in turn on the inner wall of the cleaned tire 2, then putting the tire 2 into a working cavity 101 to vertically arrange the tire 2 on two rotating rollers 401, starting an electric telescopic cylinder 802 in a limiting assembly 8 to work by a control panel, driving the U-shaped block 801 to move out of a holding tank 1012, and sleeving a U-shaped opening on the side of the tire 2 to limit the tire 2, then the spraying plate 702 and the drying block 703 of the spraying component 7 move to the inner wall of the tire 2 under the operation of the lifting component 6, at this time, the control panel starts the driving component 4 to operate, so that the two rotating rollers 401 rotate slowly in the same direction to drive the tire 2 to roll, at this time, the pump body 504 and the drying lamp 7031 operate, the pump body 504 sends the liquid colloid in the colloid preparation box 3 into the spraying plate 702 through the liquid pumping pipe 502 and the liquid conveying pipe 501 and sprays the liquid colloid to the inner wall of the tire 2 from the nozzle 7021, wherein the flow rate is 60g/s, the working pressure is 6Mpa, all the inner walls of the tire 2 can be sprayed under the slow rolling of the tire 2, the sprayed colloid moves to the drying lamp 7031 under the rotation of the tire 2 to perform primary drying, then the circulation of the spraying and drying steps is performed until the colloid forms a leakproof layer with the thickness of 5-9mm, and finally the tire 2 is taken down to perform lamination on the airtight layer, thereby completing the preparation of the self-sealing tire;

the lifting motor 601 works to drive the rotating rod 602 to rotate, the rotating rod 602 drives the thread block 603 to rotate, at the moment, the sleeve 604 is limited by the telescopic rod 605 to vertically move along with the rotation of the thread block 603, the moving sleeve 604 drives the spraying assembly 7 to move towards the inner circle edge of the tire 2 until the moving plate 701 is located at a position 1mm away from the inner circle edge of the tire 2, the telescopic length of the telescopic rod 605 reaches the maximum, and the lifting motor 601 stops working;

the slow operation of the speed reducing motor 405 in the driving assembly 4 drives the connected rotating shafts 402 to rotate, the rotating shafts 402 drive the installed driving wheels 403 to rotate, the driving wheels 403 drive the other driving wheels 403 to rotate through the meshed driving belts 404, so that the two rotating shafts 402 rotate synchronously in the same direction, the two rotating shafts 402 drive the two rotating rollers 401 to rotate, and the rotating rollers 401 enable the tire 2 to roll slowly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-sealing tyre comprising a tyre (2) and a preparation device (9), characterized in that: the tyre (2) is sequentially provided with high-strength wear-resistant rubber, a connecting layer, a coating layer, a buffer layer, a leak-proof tight-patch layer and a tight layer from outside to inside.

2. A self-sealing tyre according to claim 1, characterized in that: wherein the leak-proof dense-filling layer is composed of the following raw materials:

3. A process for the preparation of self-sealing tyres, based on any one of claims 1-2, comprising the following steps:

step one, cleaning the inner wall of the tire (2);

step two, preparing liquid colloid for the leak-proof layer by using a preparation device (9), and pressing the connecting layer, the coating layer and the buffer layer in sequence on the inner wall of the cleaned tire (2);

and step three, placing the pressed tire (2) into a preparation device (9) to enable the prepared liquid colloid to be sprayed on the inner wall of the tire and simultaneously to be subjected to simple drying treatment to form an anti-leakage airtight layer, and finally taking down the tire (2) to press the airtight layer to complete the preparation of the self-sealing tire.

4. The preparation process of a self-sealing tire according to claim 3, wherein the preparation device (9) comprises a spraying box (1) and a colloid preparation box (3), the colloid preparation box (3) is welded at the outer wall of the spraying box (1), the inside of the colloid preparation box (3) is provided with a stirring rod (302), one side of the spraying box (1) far away from the colloid preparation box (3) is provided with a working cavity (101), the bottom plate of the working cavity (101) is provided with a groove (1011), the groove (1011) is provided with a driving assembly (4), the driving assembly (4) comprises a rotating roller (401) symmetrically arranged in the groove (1011), two tires (2) are arranged above the rotating roller (401), the inner wall center of the working cavity (101) is vertically provided with a fixing block (5), the fixing block (5) passes through the hollow part of the tires (2), the lower surface of the end part of the fixing block (5) is provided with a spraying assembly (7), the spraying assembly (7) comprises a moving plate (701), the lower surface of the moving plate (701) is provided with a long side drying side (703) and two ends (501) respectively connected with a liquid pumping tube (502) and a liquid pumping tube (502) connected with a liquid pumping tube (501), the utility model discloses a colloid preparation case, including drawing liquid pipe (502), infusion pipe (501) and spray assembly (7), the liquid extraction pipe (502) extend to inside colloid preparation case (3), infusion pipe (501) link to each other with spraying assembly (7) through flexible pipe (704), just one side that the inside of fixed block (5) is located infusion pipe (501) is equipped with lifting unit (6), the execution end and the movable plate (701) upper surface of lifting unit (6) link to each other.

5. The preparation process of a self-sealing tire according to claim 4, wherein a driving stirring motor (304) is installed at the bottom of the colloid preparation box (3), the output end of the stirring motor (304) is fixedly connected with the stirring rod (302), the port of the liquid pumping pipe (502) is close to the inner bottom plate of the colloid preparation box (3), the heating sheet (303) is installed on the inner wall of the colloid preparation box (3), and the supporting legs (301) are fixed on one side of the lower surface of the colloid preparation box (3) away from the spraying box (1) through bolts.

6. The preparation process of the self-sealing tire according to claim 4, wherein a protective shell (406) is welded on the outer wall of the spraying box (1) below the colloid preparation box (3), driving wheels (403) are symmetrically arranged inside the protective shell (406), a driving belt (404) is meshed with the two driving wheels (403), the two driving wheels (403) are respectively fixedly sleeved on rotating shafts (402), one ends of the two rotating shafts (402) penetrate through the box wall of the spraying box (1) and extend into grooves (1011) and are movably connected with the inner wall of the grooves, the two rotating rollers (401) are fixedly sleeved on the outer wall of the rotating shafts (402), one end of the rotating shaft (402) close to the driving wheel (403) is fixedly provided with a speed reduction motor (405), and the speed reduction motor (405) is installed on the inner wall of the protective shell (406) through bolts.

7. The preparation process of a self-sealing tire according to claim 4, characterized in that the lifting assembly (6) comprises a lifting motor (601) installed inside a fixed block (5), a containing groove (503) is formed in the fixed block (5) and located below the lifting motor (601), the output end of the lifting motor (601) is connected with a rotating rod (602), the end portion of the rotating rod (602) penetrates out of the containing groove (503) and is welded with a threaded block (603), a sleeve (604) is sleeved on the rotating rod (602), the inner wall of the sleeve (604) is in threaded engagement with the threaded block (603), the diameter of the sleeve (604) is smaller than that of the containing groove (503), telescopic rods (605) are installed at two ends inside the fixed block (5), and the telescopic ends of the telescopic rods (605) and the end portion of the sleeve (604) are both fixedly connected with a moving plate (701).

8. The process for preparing the self-sealing tyre according to claim 4, wherein a plurality of nozzles (7021) are respectively arranged on two side walls and at the bottom of the spraying plate (702), drying lamps (7031) are symmetrically arranged on two side walls and at the bottom of the drying block (703), and the telescopic pipe (704) penetrates through the moving plate (701) and is communicated with the inside of the spraying plate (702).

9. The preparation process of a self-sealing tire according to claim 4, wherein a containing groove (1012) is formed in the center of each of two side walls of the working cavity (101), two containing grooves (1012) are provided with a limiting assembly (8), the two limiting assemblies (8) comprise U-shaped blocks (801), the two U-shaped blocks (801) are movably arranged in the containing grooves (1012), the distance between openings of the two U-shaped blocks (801) is larger than the width of the tire (2), two side walls of the spraying box (1) are provided with electric telescopic cylinders (802) through bolts, and telescopic ends of the two electric telescopic cylinders (802) extend into the containing grooves (1012) and are fixedly connected with the outer walls of the two U-shaped blocks (801) respectively.

10. The process for preparing a self-sealing tyre according to claim 9, wherein a plurality of balls (8011) are movably mounted on the inner wall of the opening of each of the two U-shaped blocks (801), and each of the balls (8011) is in contact with the outer wall of the side edge of the tyre (2).