CN110128932B

CN110128932B - Anti-aging coating for rubber tire

Info

Publication number: CN110128932B
Application number: CN201910362042.2A
Authority: CN
Inventors: 孙燕; 张丽杰; 李振; 朱诗顺; 郝振洁; 张晓丽
Original assignee: Army Military Transportation University
Current assignee: Army Military Transportation University
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2021-12-17
Anticipated expiration: 2039-04-30
Also published as: CN110128932A

Abstract

The invention discloses an anti-aging coating for a rubber tire, which uses aqueous polyurethane emulsion or aqueous polyacrylate emulsion/polyurethane emulsion hybrid emulsion. The invention has the beneficial effects that (1) the adhesive force with rubber is good; (2) the coating material has good film forming property, is convenient to construct and is suitable for spraying; (3) the coating material is easy to dry or cure, and it is generally desirable to obtain good paint film properties at room temperature, or to require only a moderate low-heat drying process; (4) the coating material has better flexibility and strength, and the coating material can be matched with the elasticity of the rubber because the rubber has certain elasticity; (5) the water-based paint is the best, and although the performance of the solvent-based paint is better than that of the similar water-based paint in general, the water-based paint is still the first choice in consideration of construction environment and current environmental protection.

Description

Anti-aging coating for rubber tire

Technical Field

The invention relates to the technical field of tire coatings, in particular to an anti-aging coating for a rubber tire.

Background

The tire cost accounts for a large proportion of the vehicle purchase cost and the vehicle use cost, and is a main expense item of the vehicle maintenance and management cost. In vehicles parked for a long time, the damage form of tires is mostly aging and deformation, and the key point of tire protection is rubber aging and tire body deformation.

The rubber aging is a phenomenon that the composition and structure of rubber are damaged due to the combined action and influence of internal and external factors in the processes of storage, transportation, processing and use of raw rubber and vulcanized rubber (including rubber products), so that the rubber gradually loses the original excellent performance and even loses the use value.

At present, the anti-aging means for rubber and products thereof at home and abroad mainly comprises methods such as a chemical protection method, coating protection, rubber modification and combination, rubber processing technology improvement and the like.

The coating protection is that a layer of other substances is coated on the surface of the rubber, so that the rubber is isolated from the external environment under the condition of not influencing the use of the rubber product, the rubber cannot be attacked by oxygen, ozone, sunlight and the like, the aging process of the rubber can be remarkably inhibited, and the coating protection is an anti-aging measure which is convenient to use and has a remarkable effect. The anti-aging measures of the coating are various, such as coating wax on the surface, coating light-shielding materials such as talcum powder and the like, but the anti-aging measures are only suitable for statically stored articles and have limited effects; the anti-aging agent solution may be applied, but most of them have poor adhesion and are easily released.

Through research and test, the application provides an anti-aging coating for a rubber tire.

Disclosure of Invention

The invention aims to provide an anti-aging coating for a rubber tire.

In order to achieve the aim of the invention, the invention provides an anti-aging coating for a rubber tire, which uses aqueous polyurethane emulsion or aqueous polyacrylate emulsion/polyurethane emulsion hybrid emulsion.

Compared with the prior art, the invention has the beneficial effects that (1) the adhesive force with rubber is good; (2) the coating material has good film forming property, is convenient to construct and is suitable for spraying; (3) the coating material is easy to dry or cure, and it is generally desirable to obtain good paint film properties at room temperature, or to require only a moderate low-heat drying process; (4) the coating material has better flexibility and strength, and the coating material can be matched with the elasticity of the rubber because the rubber has certain elasticity; (5) the water-based paint is the best, and although the performance of the solvent-based paint is better than that of the similar water-based paint in general, the water-based paint is still the first choice in consideration of construction environment and current environmental protection.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a schematic structural view of the tire clamping mechanism of the present application;

FIG. 3 is a first schematic view of the construction of the tire transport mechanism of the present application;

FIG. 4 is a second schematic view of the construction of the tire transport mechanism of the present application;

FIG. 5 is a third schematic view of the construction of the tire transport mechanism of the present application;

FIG. 6 is a schematic view showing a connection structure between the end of the piston rod of the first lift cylinder and the connecting block disposed at the lower end of the cross rod according to the present application;

in the figure, 1-equipment frame, 2-transverse fixing rod, 3-transverse air cylinder, 4-air blower, 5-longitudinal plate, 6-spray head, 7-tyre clamping mechanism, 8-driven gear, 9-driving motor, 10-exhaust fan, 11-transmission gear, 12-exhaust pipeline, 13-side fixing plate, 14-inner support frame, 15-feeding roller, 16-feeding roller frame, 18-gear, 19-conveying roller, 20-lifting frame, 21-first position sensor, 22-second position sensor, 23-first lifting air cylinder and 24-second lifting air cylinder; 71-linkage rod, 72-rotating disc, 73-cylinder, 74-sliding column, 75-rotating disc, 76-sliding block, 77-outer fixed block, 78-transverse sliding rod, 79-L-shaped supporting rod, 710-inner fixed block and 711-rotating cylinder.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that "connected" and words used in this application to express "connected," such as "connected," "connected," and the like, include both direct connection of one element to another element and connection of one element to another element through another element.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one component or module or feature to another component or module or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the component or module in use or operation in addition to the orientation depicted in the figures. For example, if a component or module in the figures is turned over, components or modules described as "above" or "above" other components or modules or configurations would then be oriented "below" or "beneath" the other components or modules or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The components or modules may also be oriented in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Example 1

The invention provides an anti-aging coating for a rubber tire, which uses aqueous polyurethane emulsion PU.

Wherein the formula of the water-based PU is as follows: tetrahydrofuran polyether glycol (PTMG-1000), 2-dimethylolpropionic acid (DMPA), trifunctional epoxypropane polymer (MN-400), isophorone diisocyanate (IPDI), Methyl Ethyl Ketone (MEK), dibutyltin Dilaurate (DBTEL), Triethylamine (TEA) and deionized water (DDI) in a mass ratio of: 1000. 87.18, 64.00, 630.16, 195.95, trace, 65.77 and 3430.

Wherein the trace amount is 0.0001-0.01 by mass ratio, and can be 0.0001, 0.01 or any value in the middle of the two.

Wherein the steps for preparing the aqueous PU emulsion are as follows:

(1) sequentially adding the measured PTMG-1000, DMPA and MEK into a four-mouth flask provided with a thermometer, a stirrer and a reflux condenser, heating to 85 ℃, stirring at the rotating speed of 80rpm, and introducing N₂；

(2) After DMPA is completely dissolved, IPDI and DBTDL catalysts are added, the mixture is reacted for 2 hours at a constant temperature of 85 ℃, and the-NCO content in the reaction system is detected to reach a theoretical value in the process; adding MN-400, cooling to 75 ℃, reacting for 3 hours, and detecting the-NCO content in the system until the-NCO content reaches a theoretical value;

(3) cooling to 60 ℃, removing the heating device, adding metered TEA, neutralizing-COOH in a molecular chain, and rapidly stirring for reacting for 5-8min, wherein the reaction time can be 5, 8 or any time between the two;

(4) increasing the stirring speed to 1500rmp, adding DDI, and dispersing for 20min at high speed;

(5) and carrying out rotary evaporation on the obtained PU emulsion to remove MEK, thus obtaining the aqueous PU emulsion.

Example 2

In this example, the coating uses an aqueous PA/PU hybrid emulsion that is made by modifying a polyurethane emulsion with a polyacrylate emulsion.

The formula of the water-based polyacrylate emulsion is as follows: methyl Methacrylate (MMA), Ethyl Acrylate (EA), 2-hydroxyethyl acrylate (HEMA), Acrylic Acid (AA), acetoacetic acid ethyl ester methacrylate (AAEM), Ammonium Persulfate (APS), Sodium Dodecyl Sulfate (SDS), sodium bicarbonate (NHC) and deionized water (DDI), wherein the mass ratios are respectively as follows: 80. 10, 5, 2.5, 0.6, 2.0, 0.2, 190.0;

according to the mass ratio of all the substances in the formula of the water-based polyacrylate emulsion, the following materials are prepared:

(1) dissolving 1.6 parts of emulsifier SDS, 0.2 part of initiator APS and 0.065 part of pH buffer NHC in 110 parts of deionized water to be used as a priming material of a reactor;

(2) dissolving the rest 0.4 parts of initiator APS, the rest 0.135 parts of sodium bicarbonate NHC, the rest 0.4 parts of emulsifier SDS and the rest 80 parts of deionized water together to prepare an initiator solution;

(3) mixing 42.5 parts of MMA, 2.5 parts of AA and 5 parts of EA to obtain a first mixed monomer;

(4) mixing 37.5 parts of MMA, 5 parts of HEMA, 2.5 parts of AAEM and 5 parts of the rest EA to obtain a second mixed monomer;

after the materials are prepared, the water-based polyacrylate emulsion is prepared according to the following steps:

(6) adding the bottoming material into a reactor, and heating to 75 ℃;

(7) 1/5 of the total amount of the mixed monomer is added into a reactor, and an obvious reaction phenomenon can be seen within 1min usually, namely the temperature of the system begins to rise, and the system is changed from milky white to dark blue;

(8) after the reaction is carried out for 15min or the reaction temperature is obviously returned, starting to simultaneously dropwise add the initiator solution and the mixed monomer I into the reactor, uniformly adding the materials, and finishing adding the rest mixed monomer I within 1h, wherein the dropwise adding of the corresponding initiator solution is 40% of all the initiator solutions, and at the reaction stage, the temperature in the reaction system is controlled to be 77-80 ℃, and can be 77, 80 ℃ or any temperature value between the 77 ℃ and the 80 ℃;

(9) after the first mixed monomer is fed, beginning to dropwise add the second mixed monomer, similarly, controlling the dropwise adding speed to be uniform, enabling all the second mixed monomers to be dropwise added within 75min, correspondingly adding 50% of all the initiator solutions, namely, after the mixed monomers are fed, adding 90% of the initiator solutions at the same time, and remaining 10% of the initiator solutions, and controlling the reaction temperature to be 80-82 ℃ in a second stage, wherein the temperature can be 82 ℃ or 80 ℃ or any temperature value between the two temperatures;

(10) after all monomers are fed, the last 10% of initiator solution is dripped, the dripping time is controlled to be 15min, after all the initiators are fed, the temperature of a reaction system is raised to 85 ℃, the reaction system is kept at the temperature for 0.5-1h, the temperature can be lowered to the room temperature by 0.5 or 1 or any time between the two, and the reaction system is filtered and discharged, and polyacrylate emulsion is collected for the improvement of polyurethane.

On the basis of the above, the formula for further preparing the aqueous PA/PU hybrid emulsion is as follows:

tetrahydrofuran polyether glycol (PTMG-1000), 2-dimethylolpropionic acid (DMPA), 1,4 Butanediol (BDO), isophorone diisocyanate (IPDI), Triethylamine (TEA), Ethylenediamine (EDA), N-methylpyrrolidone (NMP), deionized water (DDI) and the prepared PA emulsion in the mass ratio: 800. 86.304, 17.218, 733.524, 65.77, 15, 120, 4000, 2500; the proportion of 1000 parts of hybrid emulsion is respectively as follows: 95.95, 10.35, 2.06, 87.98, 7.89, 1.8, 14.39, 479.74, 299.84;

the steps for preparing the aqueous PA/PU emulsion are as follows:

(1) sequentially adding PTMG-1000, DMPA, BDO and NMP in a four-neck flask provided with a thermometer, a stirrer and a reflux condenser, and heating to 85 DEGStirring at 80rpm, introducing N₂；

(2) After DMPA is completely dissolved, IPDI and a trace DBTDL catalyst are added, and the mixture is reacted at a constant temperature of 85 ℃ until the-NCO content in the reaction system reaches a theoretical value;

(3) cooling to 60 ℃, removing the heating device, adding metered TEA, neutralizing-COOH in a molecular chain, and rapidly stirring for reacting for 5-8min, wherein the reaction time can be 5min, 8min or any time between the two;

(4) mixing the metered deionized water and the water-based polyacrylate emulsion together and uniformly stirring, then increasing the stirring speed in the reactor to 1500rpm, adding the mixed solution of the deionized water and the PA emulsion, dispersing at a high speed for 20min, and optionally adding a small amount of defoaming agent according to the dispersion condition;

(5) after the dispersion stage, the temperature of the PA/PU dispersoid is close to room temperature, the stirring speed is reduced to 750rpm, the metered ethylenediamine is slowly dripped into the reactor, the temperature is gradually increased to 50 ℃ after the stirring is continued for 10min, the stirring reaction is continued for 30min, and then the temperature can be reduced, the material can be discharged, the filtration and the collection can be carried out.

Wherein the coating is sprayed by a dedicated device.

As shown in fig. 1 to 6, the apparatus for performing the above coating spraying includes: the tire spraying device comprises an equipment frame, wherein a tire conveying mechanism, a tire clamping mechanism and a tire spraying mechanism are arranged on the equipment frame, the tire conveying mechanism is used for conveying tires, the tire clamping mechanism is used for moving the tires to a spraying position, and the tire spraying mechanism is used for spraying the tires.

The tire spraying device has the advantages that the tire conveying mechanism is utilized for conveying tires, the tire clamping mechanism is utilized for fixing and rotating the tires, and the tire spraying mechanism is utilized for spraying the tires, so that the effect is good, the use requirement of tire spraying can be met, the working strength is reduced, and the working efficiency is improved; wherein, the equipment frame is a square frame structure.

In a preferred embodiment, the tire transfer mechanism comprises: the tire conveying mechanism comprises three parts, namely a feeding part, an active conveying part and a discharging part, wherein the active conveying part comprises side fixing plates which are respectively arranged on two sides of the upper end of the inner supporting frame, a plurality of conveying rollers capable of rotating are arranged between the side fixing plates at intervals, conveying roller shafts of the conveying rollers are connected with the side fixing plates in a sliding mode, gears are arranged on the conveying roller shafts and are connected with a motor through chains, and the motor drives the gears to rotate so as to drive the conveying rollers to rotate.

The lifting frame capable of lifting is arranged between the inner support frames and is of a cross structure, the lower end of the lifting frame is provided with a second lifting cylinder which is longitudinally arranged, and the lifting frame is driven to move up and down through the second lifting cylinder, so that the tire stopped on the lifting frame is driven to move up and down.

A feeding part is arranged on the front side of the inner support frame, a tire enters from the feeding part, the feeding part is obliquely arranged, and the feeding part comprises: the feeding roller frame is a U-shaped frame, transverse rods are connected between two sides of the feeding roller frame, the two sides of the feeding roller frame are connected through a plurality of feeding rollers arranged at intervals, the roller shafts at two ends of each feeding roller are connected with the feeding roller frame in a sliding mode, two ends of the feeding roller frame are connected with two sides of the inner support frame in a hinged mode through first hinge pins respectively, the lower end of each transverse rod is provided with a first lifting cylinder arranged in an inclined mode, the end portion of a piston rod of each first lifting cylinder is connected with a connecting block arranged at the lower end of each transverse rod in a hinged mode through second hinge pins, the feeding portion can be driven to rotate around the first hinge pins, and therefore the feeding portion can be lifted up and put down. The tire is placed in material loading portion, then, lifts up material loading portion through first lift cylinder to can remove the tire on the material loading roller of material loading portion, then, get into initiative conveying portion, the conveying roller of initiative conveying portion is rotatory by oneself under power, and the automatic tire that drives removes preset position, crane rebound, tire fixture carries out the centre gripping with the tire, then, carries out the spraying. And one side of the inner support frame is also provided with an oblique blanking part, and the blanking part comprises a blanking frame and a rotatable blanking roller arranged on the blanking frame. After the spraying is finished, the tire clamping mechanism puts the tire on the active conveying part, the active conveying part moves the tire to the blanking part, and then the tire is led out of the blanking part.

Wherein, tire fixture sets up on the equipment frame of crane top, tire fixture includes: the device comprises a transmission gear and a driven gear, wherein the transmission gear is connected with a motor shaft of a driving motor arranged on an equipment frame, the transmission gear is driven to rotate by the driving motor, the transmission gear is in transmission connection with the driven gear arranged on the equipment frame, the transmission gear drives the driven gear to rotate, the lower end of the driven gear is connected with a rotary disc, the center part of the lower end of the rotary disc is provided with a cylinder, the cylinder is in sliding connection with an annular rotary disc, the rotary disc can rotate around the cylinder, 3 or 4L-shaped support rods are uniformly arranged on the side circumferential surface of the rotary disc along the circumferential interval, the upper end of each L-shaped support rod is connected with a sliding block, a transverse sliding rod penetrates through the sliding block and is in sliding connection with the sliding block, two ends of the transverse sliding rod are respectively connected with an inner side fixed block arranged at the lower end of the cylinder and an outer side fixed block arranged at the lower end of the rotary disc, and a sliding column is arranged at the upper end of the sliding block, the carousel lower extreme is provided with the sliding tray, slip post upper end slides in the sliding tray, the slip post passes articulated slab and sliding connection, the articulated slab is connected with the hinge lug that sets up on rolling disc side circumference through third round pin axle is articulated, the carousel lower extreme is provided with revolving cylinder, and revolving cylinder's piston rod is connected with the one end of gangbar is articulated, and the other end and the pin post that sets up on the rolling disc of gangbar are articulated to be connected, and it is rotatory to drive the rolling disc through revolving cylinder's piston rod is flexible to drive the sliding block and slide on horizontal slide bar, L type bracing piece pass tire center part, and the internal diameter of the structure that a plurality of L type bracing pieces formed can change, through the change of internal diameter, carries out the centre gripping to the tire or puts down the tire.

Wherein, be provided with the first position sensor and the second position sensor that are used for monitoring tire position on the side fixed plate of one side. The first position sensor and the second position sensor are both infrared sensors, and when the tire reaches the position of the second sensor, the driving roller of the driving conveying part starts to rotate to drive the tire to move forwards. When the position of the tire reaches the position of the first sensor, the driving roller stops rotating, the lifting frame moves upwards to jack up the tire, and then the tire is clamped by the tire clamping mechanism. And starting the tire spraying mechanism to spray the tire.

Wherein, tire spraying mechanism, including setting up the horizontal dead lever inboard at equipment frame, be provided with horizontal cylinder on the horizontal dead lever, the tailpiece of the piston rod portion of horizontal cylinder is provided with fore-and-aft vertical board, be provided with the shower nozzle on the vertical board, the shower nozzle passes through the pipeline and scribbles the storage bucket intercommunication, and the shower nozzle is two from top to bottom for setting up, can carry out all-round spraying to the tire outside through two shower nozzles, and the shower nozzle adopts the equipment of purchasing, sets up inboard shower nozzle in order to improve the spraying effect, sets up hollow structure with the cylinder, carries out the spraying to the tire inboard at its inboard installation shower nozzle.

The side face and the upper end face of the equipment frame are sealed through sealing plates, an exhaust fan and a blower are arranged on the upper end face, the exhaust fan is connected with an exhaust pipeline, and an air inlet of the blower is communicated with the inner side of the equipment frame. The dust and the like can be recovered through the air suction pipeline, air cooling can be realized through the air inlet, and the spraying effect is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The spraying equipment for the anti-aging coating of the rubber tire is characterized in that the coating uses water-based polyurethane emulsion PU or water-based polyacrylate emulsion PA/polyurethane emulsion PU hybrid emulsion;

the coating is sprayed by special equipment;

the apparatus comprises: the tire spraying device comprises an equipment frame, wherein a tire conveying mechanism, a tire clamping mechanism and a tire spraying mechanism are arranged on the equipment frame, the tire conveying mechanism is used for conveying tires, the tire clamping mechanism is used for moving the tires to a spraying position, and the tire spraying mechanism is used for spraying the tires;

the tire conveying mechanism includes: the tire conveying mechanism comprises three parts, namely a feeding part, a driving conveying part and a discharging part, wherein the driving conveying part comprises side fixing plates which are respectively arranged on two sides of the upper end of the inner supporting frame, a plurality of rotatable conveying rollers are arranged between the side fixing plates at intervals, conveying roller shafts of the conveying rollers are in sliding connection with the side fixing plates, gears are arranged on the conveying roller shafts, the gears are connected with a motor through chains, and the motor drives the gears to rotate so as to drive the conveying rollers to rotate;

a lifting frame capable of lifting is arranged between the inner support frames, the lifting frame is of a cross structure, a second lifting cylinder which is longitudinally arranged is arranged at the lower end of the lifting frame, and the lifting frame is driven to move up and down through the second lifting cylinder, so that a tire which is stopped on the lifting frame is driven to move up and down;

a feeding part is arranged on the front side of the inner support frame, a tire enters from the feeding part, the feeding part is obliquely arranged, and the feeding part comprises: the feeding roller frame is a U-shaped frame, transverse rods are connected between two sides of the feeding roller frame, the two sides of the feeding roller frame are connected through a plurality of feeding rollers arranged at intervals, roller shafts at two ends of each feeding roller are connected with the feeding roller frame in a sliding mode, two ends of the feeding roller frame are respectively hinged to two sides of the inner support frame through a first pin shaft, a first lifting cylinder arranged obliquely is arranged at the lower end of each transverse rod, the end portion of a piston rod of each first lifting cylinder is hinged to a connecting block arranged at the lower end of each transverse rod through a second pin shaft, and the feeding portion can be driven to rotate around the first pin shaft, so that the feeding portion can be lifted up and put down;

wherein, tire fixture sets up on the equipment frame of crane top, tire fixture includes: the device comprises a transmission gear and a driven gear, wherein the transmission gear is connected with a motor shaft of a driving motor arranged on an equipment frame, the transmission gear is driven to rotate by the driving motor, the transmission gear is in transmission connection with the driven gear arranged on the equipment frame, the transmission gear drives the driven gear to rotate, the lower end of the driven gear is connected with a rotary disc, the center part of the lower end of the rotary disc is provided with a cylinder, the cylinder is in sliding connection with an annular rotary disc, the rotary disc can rotate around the cylinder, 3 or 4L-shaped support rods are uniformly arranged on the side circumferential surface of the rotary disc along the circumferential interval, the upper end of each L-shaped support rod is connected with a sliding block, a transverse sliding rod penetrates through the sliding block and is in sliding connection with the sliding block, two ends of the transverse sliding rod are respectively connected with an inner side fixed block arranged at the lower end of the cylinder and an outer side fixed block arranged at the lower end of the rotary disc, and a sliding column is arranged at the upper end of the sliding block, the lower end of the rotary disc is provided with a sliding groove, the upper end of the sliding column slides in the sliding groove, the sliding column penetrates through a hinged plate and is in sliding connection with the hinged plate, the hinged plate is hinged and connected with a hinged lug arranged on the circumferential surface of the rotary disc side through a third pin shaft, the lower end of the rotary disc is provided with a rotary cylinder, a piston rod of the rotary cylinder is hinged and connected with one end of a linkage rod, the other end of the linkage rod is hinged and connected with a pin column arranged on the rotary disc, the rotary disc is driven to rotate through the extension and contraction of the piston rod of the rotary cylinder, so that a sliding block is driven to slide on a transverse sliding rod, and an L-shaped supporting rod penetrates through the center part of a tire;

when the tire reaches the position of the second sensor, a driving roller of the driving conveying part starts to rotate to drive the tire to move forwards; when the position of the tire reaches the position of the first sensor, the driving roller stops rotating, the lifting frame moves upwards to jack up the tire, and then the tire is clamped by the tire clamping mechanism.

2. The spraying equipment of the anti-aging coating of the rubber tire as in claim 1, wherein the formula of the water-based PU is as follows: tetrahydrofuran polyether glycol PTMG-1000, 2-dimethylolpropionic acid DMPA, three-functionality propylene oxide polymer MN-400, isophorone diisocyanate IPDI, methyl ethyl ketone MEK, dibutyltin dilaurate DBTEL, triethylamine TEA and deionized water DDI, wherein the mass ratio is respectively as follows: 1000: 87.18: 64.00: 630.16: 195.95: (0.0001-0.01): 65.77: 3430.

3. the spraying apparatus of the anti-aging coating layer for rubber tires according to claim 2, characterized in that the step of preparing the aqueous PU emulsion is as follows:

(3) cooling to 60 ℃, removing the heating device, adding metered TEA, neutralizing-COOH in a molecular chain, and quickly stirring for reacting for 5-8 min;

4. The spraying equipment for the anti-aging coating of the rubber tire as in claim 1, wherein the water-based PA/PU hybrid emulsion is prepared by modifying and processing polyurethane emulsion by polyacrylate emulsion.

5. The spraying apparatus for an anti-aging coating layer of a rubber tire as claimed in claim 4, wherein the formulation of the aqueous polyacrylate emulsion is as follows: methyl methacrylate MMA, ethyl acrylate EA, acrylic acid-2-hydroxyethyl methacrylate HEMA, acrylic acid AA, methacrylic acid acetoacetic acid ethyl ester AAEM, ammonium persulfate APS, sodium dodecyl sulfate SDS, sodium bicarbonate NHC and deionized water DDI, wherein the mass ratios are respectively as follows: 80: 10: 5: 2.5: 2.5: 0.6: 2.0: 0.2: 190.0;

(1) dissolving 1.6 parts of emulsifier SDS, 0.2 part of initiator APS and 0.065 part of pH buffer NHC in 110 parts of deionized water DDI to serve as a priming material of a reactor;

(2) dissolving the rest 0.4 parts of initiator APS, the rest 0.135 parts of sodium bicarbonate NHC, the rest 0.4 parts of emulsifier SDS and the rest 80 parts of deionized water DDI together to prepare an initiator solution;

adding the bottoming material into a reactor, and heating to 75 ℃;

1/5 of the total amount of the mixed monomers is added into the reactor, and the reaction is usually completed within 1min

Obvious reaction phenomena are seen, namely, the temperature of the system begins to rise, and the system is changed from milky white to dark blue;

after the reaction is carried out for 15min or the reaction temperature is obviously returned, the reaction is started to be carried out simultaneously

Dropping an initiator solution and a mixed monomer I into the reactor, uniformly feeding the materials, finishing the addition of the rest mixed monomer I within 1 hour, and controlling the temperature in the reaction system to be 77-80 ℃ at the reaction stage, wherein the dropping amount of the corresponding initiator solution is 40% of that of all the initiator solutions;

after the first mixed monomer is fed, the second mixed monomer is dripped, and similarly,

controlling the dripping speed to be uniform, correspondingly adding 50% of all initiator solutions when all the second mixed monomers are dripped within 75min, namely adding 90% of the initiator solutions when the mixed monomers are completely added, and controlling the reaction temperature to be 80-82 ℃ in a second stage;

when all monomers are added, the final 10 percent of initiator solution is dripped, and the control is carried out

The dripping time is 15min, after all the initiators are added, the temperature of the reaction system is raised to 85 ℃, the temperature is kept for 0.5 to 1h, the temperature can be reduced to room temperature, and the polyacrylate emulsion is filtered, discharged and collected for the improvement of polyurethane.

6. The spraying equipment of the anti-aging coating of the rubber tire as claimed in claim 5, wherein the formula of the water-based PA/PU hybrid emulsion is further prepared on the basis of the above formula as follows:

tetrahydrofuran polyether glycol PTMG-1000, 2-dimethylolpropionic acid DMPA, 1,4 butanediol BDO, isophorone diisocyanate IPDI, triethylamine TEA, ethylenediamine EDA, N-methyl pyrrolidone NMP, deionized water DDI and the prepared PA emulsion in the mass ratio of: 800: 86.304: 17.218: 733.524: 65.77: 15: 120: 4000: 2500;

the steps for preparing the aqueous PA/PU emulsion are as follows:

(1) sequentially adding PTMG-1000, DMPA, BDO and NMP which are well measured into a four-mouth flask provided with a thermometer, a stirrer and a reflux condenser, heating to 85 ℃, stirring at the rotating speed of 80rpm, and introducing N₂；

(4) mixing the measured deionized water DDI and the water-based polyacrylate emulsion together and stirring uniformly, then increasing the stirring speed in the reactor to 1500rpm, adding the mixed solution of the deionized water DDI and the PA emulsion, dispersing at a high speed for 20min, and optionally adding a small amount of defoaming agent according to the dispersion condition;