CN111041853A

CN111041853A - A process and system for dipping asphalt

Info

Publication number: CN111041853A
Application number: CN201911366880.3A
Authority: CN
Inventors: 曾昭奇; 匡奕楠; 丁爱国; 王凯
Original assignee: Keshun Waterproof Technology Co Ltd
Current assignee: Keshun Waterproof Technology Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-21

Abstract

The present invention is in the technical field of asphalt waterproofing membrane production equipment, and discloses a process and system for dipping and coating asphalt, which is used for dipping and coating asphalt on a tire base fabric to make a tire waterproofing membrane, including pre-dipping: coating asphalt on tire The surface of the base fabric or the base fabric is dipped into the asphalt so that the asphalt covers the surface of the base fabric, and then the base fabric covered with asphalt is squeezed in an acute angle to the vertical direction; drying: rolling with contact Drying the prepreg base by means of a heating element; coating: coating the asphalt on the surface of the dried prepreg base or immersing the prepreg base in the asphalt so that the asphalt covers the surface of the prepreg base, and then Use the high-speed rolling heating element for rough pressing and then use the low-speed rolling heating element for fine pressing. The present invention adopts the combination of prepreg-drying-coating, and makes the three more compatible by improving the prepreg process, drying process, coating process, and prepreg device, drying device and coating device. , so as to promote the improvement of the quality of the finished waterproof membrane.

Description

Process and system for dip-coating asphalt

Technical Field

The invention relates to the technical field of asphalt waterproof coiled material production equipment, in particular to a process and a system for dip-coating asphalt.

Background

The asphalt waterproof coiled material is a coiled material made of asphalt material, base material and surface spreading anti-sticking material, also called asphalt felt, and is commonly used for a pasting type waterproof layer. The asphalt waterproof coiled material comprises a filled coiled material and a non-filled coiled material. The roll-shaped material is made by impregnating base materials such as thick paper or glass fiber cloth, asbestos cloth, cotton and linen fabrics and the like with petroleum asphalt and is called as a base coiled material; asbestos, rubber powder, etc. are mixed into asphalt material, and the rolled material is called rolled coiled material, i.e. tubeless coiled material.

The modified asphalt waterproof coiled material is commonly called modified asphalt felt, and is a curlable sheet-like waterproof material which is prepared by taking a glass fiber felt, a polyester felt, a jute cloth, a polyethylene film, a polyester non-woven fabric, a metal foil or two composite materials as a base, taking synthetic high molecular polymer modified asphalt and oxidized asphalt with the mixing amount of not less than 10% as dip-coating materials and taking powder, sheet and granular mineral materials, synthetic high molecular films and metal films as covering materials. Due to inherent disadvantages of low softening point, high penetration and low temperature brittleness of asphalt itself, the application range of the asphalt is limited when the asphalt is used as a waterproof material. After the asphalt is modified by adding the high molecular polymer, the performances are greatly improved, the weather resistance, the temperature sensitivity (high-temperature characteristic and low-temperature flexibility) and the adaptability to substrate cracking are obviously improved, and the waterproof material prepared by using the modified asphalt is realistic and possible from the traditional 'heavy, thick, long and big' era to the 'light, thin, short and small' industrialized era.

The production process of the waterproof roll material is to dip-coat asphalt on base fabric of non-woven fabric and the like, and then extrude the base fabric dipped with asphalt to tamp the asphalt on the base fabric. Two procedures of pre-dipping and coating are needed during production. The pre-dipping has the function of soaking the pre-dipping asphalt into the tire base fabric, so that the tire base fabric can be completely soaked with the asphalt, and water channeling and layering of a finished product after the finished product is in contact with water are avoided; the utility model discloses a chinese utility model patent of application number 201821253146.7 discloses a preimpregnation device for modified asphalt waterproofing membrane production, it adopts the compression roller group to extrude the child base cloth of having dip-coated pitch, and the vertical direction from the bottom up of compression roller group 6 includes driving roller 61, extrusion fixed roll 62 and extrusion movable roll 63. Although the effect of extruding the tire base fabric can be achieved, the driving roller 61, the extruding fixed roller 62 and the extruding movable roller 63 are arranged on the same vertical plane, the extruding action point is located at the highest point of the roller which is arranged in the two adjacent rollers in a downward mode, the extruded asphalt flows towards the two sides of the extruding point during extrusion, the roller surface of the roller which is arranged in the downward mode and is not covered by the tire base fabric is adhered by the flowing asphalt to cause roller adhesion, when the asphalt has high viscosity, the extrusion of the subsequent tire base fabric is affected, the surface of the extruded tire base fabric is obviously sunk, and finally the finished product has the phenomena of bubbles and white spots on the surface, poor water tightness and low peeling strength.

After presoaking, the coating is usually carried out after drying, the drying effect influences the presoaking effect and is related to the success or failure of the coating, the presoaking tire base is prevented from being pulled and deformed, the drying is carried out in a suspended drying or blow-drying mode in the prior art, and the drying effect of the drying mode is not satisfactory. On one hand, the coating is to meet a certain thickness requirement, and more importantly, to finally obtain a strictly uniform waterproof roll, however, the strict uniformity of the waterproof roll produced by the existing coating device is not satisfactory, and the service life of the waterproof roll is influenced.

Disclosure of Invention

In view of the above, the present invention provides a process and a system for dip-coating asphalt, which overcome at least one of the above disadvantages of the prior art, solve the problem of roll sticking during extrusion, and avoid the unqualified finished products; solves the problems of contradiction between drying effect and pulling deformation and difficulty in coating and covering to achieve the expected effect.

In order to solve the technical problems, the invention adopts the following technical scheme:

a process for dip-coating asphalt is used for dip-coating asphalt on a base fabric to manufacture a waterproof roll with a tire, and comprises the following steps:

s1, presoaking: coating asphalt on the surface of the tire base cloth or soaking the tire base cloth into the asphalt so that the asphalt covers the surface of the tire base cloth, and then extruding the tire base cloth with the asphalt coated on the surface in a direction forming an acute angle with the vertical direction;

s2, drying: drying the prepreg base treated in the step S1 in a manner of contacting with a rolling heating element;

s3, coating: coating the asphalt on the surface of the prepreg base treated in step S2 or dipping the prepreg base in the asphalt so that the asphalt covers the surface of the prepreg base, and then rough pressing with a high-speed rolling heater and finish pressing with a low-speed rolling heater.

Step S1 of the present invention is to replace the conventional process of extruding the tire base fabric in the vertical direction, i.e. the extrusion force is parallel to the vertical direction, and creatively propose a method of extruding the tire base fabric with asphalt coated on the surface in the direction forming an acute angle with the vertical direction, i.e. the extrusion force is in an inclined state, so that the portion of the extruded tire base fabric near the extrusion point/line/surface is also in an inclined state, the position relationship of the tire base fabrics at both sides of the extrusion point/line/surface is in a side-up and side-down relationship, and the asphalt extruded and running to both sides can be re-received by the tire base fabric without adhering to the extrusion equipment, thereby avoiding the defects of air bubbles, surface white spots, poor water impermeability, low peel strength, etc. of the finished product. Step S2 also abandons the traditional space drying mode, and adopts contact type drying, thereby greatly improving the drying effect. Step S3 improves the extrusion mode, improves the extrusion tightness and uniformity through the combination of two processes of rough pressing and fine pressing, and the design concept of the drying device is continued by the double-straight-line extrusion forming mechanism, so that the deformation probability can be greatly reduced while the delay uniformity is improved.

The base fabric with the asphalt coated on the surface is extruded twice in the direction forming an acute angle with the vertical direction, and the front and back surfaces of the base fabric are opposite in direction in the extruding process of the two times, so that the front and back surfaces of the coiled material or the pre-impregnated coiled material obtained after extrusion are stressed averagely, are not easy to warp, and have smoother surfaces. As mentioned above, the pressing force is inclined, and the portion of the pressed base fabric near the pressing point/line/surface is also inclined, so that the front and back surfaces of the base fabric are necessarily inclined one surface up and the other surface down, and therefore the opposite directions are not absolute opposite in relation to each other, but it should be understood that: if the front surface of the tire base fabric is inclined upwards in the first extrusion, the front surface of the tire base fabric is inclined downwards in the second extrusion; and vice versa.

The invention also provides a system for dip-coating asphalt, which comprises a pre-soaking device, a drying device and a coating device which are sequentially arranged; the pre-dipping device comprises a pre-dipping pool used for containing asphalt and dipping the base fabric in the asphalt and an extrusion mechanism arranged above the pre-dipping pool and used for extruding the base fabric dipped with the asphalt, wherein the extrusion mechanism comprises at least two extrusion rollers, the rotating shafts of the two adjacent extrusion rollers are parallel to each other but not in the same vertical plane, and the base fabric penetrates into a crack between the two adjacent extrusion rollers from the lower sides of the two adjacent extrusion rollers after the asphalt is dipped in the pre-dipping pool; the drying device comprises two drying rollers which are arranged at a distance and are driven independently, and the two drying rollers have heat; the coating device comprises a coating pool for containing and/or receiving asphalt and a double-straight-line extrusion forming mechanism arranged above the coating pool, wherein the double-straight-line extrusion forming mechanism comprises two pairs of extrusion rollers which are arranged in pairs at intervals and have heat, the second upper extrusion roller and the second lower extrusion roller are used for rough pressing, the third upper extrusion roller and the third lower extrusion roller are used for fine pressing, and the rotating speed of the second upper extrusion roller is greater than that of the third upper extrusion roller.

The invention provides a system for dip-coating asphalt, which effectively improves the finished product quality of a waterproof coiled material, aiming at the processes of pre-dipping, drying and coating asphalt in the production process of an asphalt waterproof coiled material.

The invention arranges the rotating shafts of two adjacent squeeze rollers in different vertical planes, so that the squeeze action line deviates from the highest point of the squeeze roller at the lower position, and an included angle is formed between the tangent plane of the squeeze roller at the squeeze action line and the horizontal plane. The plane of the rotating shafts of the two adjacent squeeze rollers is used as a separating surface, a groove with bearing effect is formed between the two adjacent squeeze rollers on the upper side of the separating surface (namely the upper sides of the two adjacent squeeze rollers), and extruded asphalt is accommodated by the groove when emerging from the upper side of the separating surface when the tire base cloth is extruded, so that the phenomenon of roller adhesion caused by flowing along the roller surface can be avoided. And when the extruded asphalt emerges from the lower side of the interface (namely the lower sides of two adjacent squeeze rollers), the extruded asphalt falls downwards or flows downwards along the roller surface, but because the squeeze rollers generally rotate along the material-moving direction of the tire base fabric, the asphalt flowing through the roller surface is continuously reabsorbed by the tire base fabric and does not stay on the roller surface for too long time, the problem of roller sticking can be solved to a great extent, and the defects of bubbles, surface white spots, poor water impermeability, low peeling strength and the like of a finished product are avoided.

Drying device mainly comprises two independent driven stoving rollers at a distance from setting up, two stoving rollers are driven by different actuating mechanism respectively, even if viscosity is greatly under high temperature can not lead to waterproofing membrane by tensile deformation under the condition of improvement yet, such setting has avoided two stoving rollers to constitute the effect of dragging to the waterproofing membrane that is located between the two on the one hand, on the other hand is equivalent to the waterproofing membrane before giving the stoving in the stoving stage and after the stoving provides the tension buffer, thereby effectively prevent waterproofing membrane by constantly stretching and take place to warp in process of production. In addition, the traditional air-separating drying mode is abandoned, and the contact type drying is adopted, so that the drying effect is greatly improved.

The device of covering adopts two straight row extrusion mechanisms, each squeeze roll all has the heat, further soften the pitch of contact department and make it extrude the air faster in the extrusion, pack up the gap, prevent that the bubble from producing, realize the coarse compaction to waterproofing membrane under the extrusion of squeeze roll under squeeze roll and the second on the great second of rotational speed, realize the fine compaction to waterproofing membrane under the extrusion of squeeze roll and the third on the less third of rotational speed relatively, through coarse compaction, improve extruded rigidness and homogeneity of combining together of fine compaction twice process, two straight row extrusion mechanisms have continued drying device's design theory on the same way, can also greatly reduced the probability of warping when improving the time delay homogeneity.

For higher viscosity asphalt, the extruded asphalt may stick to the squeeze rolls without being reabsorbed as it emerges from the underside of the interface and runs down the roll face. Therefore, the rotating shafts of two adjacent squeezing rollers are not in the same horizontal plane, each two adjacent squeezing rollers comprise an upper roller and a lower roller when viewed from the position relation, and the tire base cloth is fed from one side far away from the upper roller and penetrates into a gap between the upper roller and the lower roller from the lower side. Therefore, the lower roller is wrapped on the feeding side of the tire base cloth penetrating into the gap from the lower side, the asphalt which flows down falls on the tire base cloth which is not extruded by the extruding roller and cannot be adhered to the extruding roller, the asphalt is further prevented from being adhered to the roller, especially when the asphalt viscosity is higher, the extruded asphalt falls on the tire base cloth which is not extruded by the extruding roller again, the roller adhesion can be effectively prevented, the surface unevenness caused by the asphalt falling on the tire base cloth again can be avoided, the extruding effect is better, the good operation of equipment can be better kept, the maintenance frequency of the equipment is reduced, the production continuity is ensured, and the production efficiency is improved.

The extrusion mechanism comprises three extrusion rollers, wherein a first lower extrusion roller, a first middle extrusion roller and a first upper extrusion roller are arranged from bottom to top respectively, the tire base cloth is fed from one side far away from the first middle extrusion roller, then passes through a gap between the first lower extrusion roller and the first middle extrusion roller from the lower side, and then passes through the gap between the first middle extrusion roller and the first upper extrusion roller from the lower side, so that the tire base cloth is extruded twice on the front side and the back side in the three extrusion rollers respectively, the front side and the back side of the coiled material or the pre-impregnated coiled material after extrusion are stressed averagely, the coiled material or the pre-impregnated coiled material is not easy to warp, and the surface is more smooth.

For the specific dip-coating mode of the tire base fabric in the prepreg tank, the invention provides the following three schemes:

the first scheme is that the tire base cloth pre-dipping device comprises a pre-dipping pool, a coating roller and a coating roller, wherein the coating roller is arranged on one side of an extrusion mechanism, at least part of the coating roller extends into the pre-dipping pool and contacts with asphalt, the tire base cloth enters the pre-dipping device from one side of the coating roller far away from the extrusion mechanism and leaves the pre-dipping device after sequentially passing through the coating roller and the extrusion mechanism, and the asphalt in the pre-dipping pool is brought upwards and coated on the lower surface of the tire base cloth passing through the coating roller in. In the scheme, the base fabric of the tire does not need to enter asphalt in the pre-dipping pool, crosses over the coating roller and keeps effective contact with the coating roller in the process, and the lower surface of the base fabric of the tire is coated with the asphalt when crossing over the coating roller, so that the conventional half-tire waterproof coiled material is finally formed. Preferably, the surface of the coating roller is of a sand surface structure, which is beneficial to bringing asphalt upwards better in the rotating process of the coating roller, so that the tire base fabric can be better coated with an asphalt layer with the thickness meeting the requirement.

The second scheme also comprises an immersion roller at least partially extending into the asphalt in the pre-immersion pool, wherein the tire base cloth extends into the pre-immersion pool from one side of the immersion roller after entering the pre-immersion device, then extends out from the other side of the immersion roller, and then leaves the pre-immersion device after being extruded by the extrusion mechanism. In the scheme, the base fabric of the tire needs to completely enter the asphalt in the pre-soaking pool, and the soaking roller is used for pressing the base fabric of the tire to the asphalt so as to completely soak the base fabric of the tire in the process, so that the waterproof roll with the whole tire in the traditional sense is finally formed. Preferably, the dip-coating roller is of a hollow structure, the dip-coating roller of the hollow structure can play a role in stirring asphalt in the pre-dip tank when rotating, the uniformity of the asphalt is ensured, and meanwhile, the dip-coating roller of the hollow structure occupies a small absolute space, so that the effective accommodating space for dip coating is improved, and the miniaturization of equipment is facilitated. Preferably, the dipping rollers can lift and extend into the pre-dipping tank, and the dipping rollers can lift when the pre-dipping tank is cleaned, so that later maintenance or repair is facilitated. Preferably, the tire base cloth comprises two soaking rollers and a pair of prepressing rollers which are arranged at a distance, the tire base cloth is prepressed by the prepressing rollers after passing through one soaking roller, then passes through the other soaking roller and then enters the extrusion mechanism for extrusion, so that the tire base cloth can be soaked, and the better dip-coating effect is favorably achieved.

According to a third scheme, the pre-dipping device comprises a coating roller and a dipping roller, the coating roller is arranged on one side, away from the extrusion mechanism, of the pre-dipping tank, and the dipping roller is arranged between the coating roller and the extrusion mechanism. The scheme is the synthesis of the two schemes, and a user can select any one dip-coating mode of a coating mode or a dip-coating mode according to needs. The coating roller sets up in the one side of presoaking the pond, and whether the child base cloth gets into the roller of coating earlier when presoaking the device, whether select the coating mode, the coating roller can both play the supporting role to child base cloth, avoids child base cloth to scrape the edge of presoaking the pond, can lead to child base cloth to warp when serious, especially more likely scrapes the edge of presoaking the pond when adopting the mode of flooding. For the preferences of the coating roll and the dip roll, respectively, reference can be made to the preferences of the two above-mentioned alternatives.

The rotating speed of the second upper squeeze roll in the coating pool is higher than that of the second lower squeeze roll, the rotating speed of the third upper squeeze roll is lower than that of the third lower squeeze roll, a speed difference is formed between the upper squeeze roll and the lower squeeze roll, so that the second upper squeeze roll can form a leveling effect on the upper surface of the waterproof coiled material, the third upper squeeze roll can form a compacting effect on the upper surface of the waterproof coiled material, the leveling effect is realized while compacting is realized, the compacting effect is realized while driving the leveling effect to a certain degree, and the tightness uniformity of the waterproof coiled material is further improved. The rotating speed of the second lower extrusion roller is basically consistent with that of the third lower extrusion roller, and the continuous compaction effect of the second lower extrusion roller on the lower surface of the waterproof roll is kept. Each extrusion roller is respectively driven by four large-torque servo motors.

The contact position of the extrusion roller and the waterproof coiled material in the coating pool is arranged, the linear velocity direction of the extrusion roller on the second is the same as the moving direction of the waterproof coiled material, the linear velocity direction of the extrusion roller under the second is opposite to the moving direction of the waterproof coiled material, the linear velocity direction of the extrusion roller on the third is the same as the moving direction of the waterproof coiled material, and the linear velocity direction of the extrusion roller under the third is opposite to the moving direction of the waterproof coiled material. In other words, the rotating directions of all the extrusion rollers are kept consistent, and the upper extrusion roller forms a friction force which is consistent with the trend of the waterproof roll on the waterproof roll at the contact part of the upper extrusion roller and the waterproof roll, so that the waterproof roll is pushed to move forwards; the lower squeeze roll forms a friction force opposite to the direction of the waterproof coiled material at the contact part of the lower squeeze roll and the waterproof coiled material, and a certain leveling effect is formed while the lower squeeze roll is compacted.

The distance between the two pairs of extrusion rollers in the coating pool is not more than 60cm, and the distance is too large, so that the compaction is not favorably finished at proper temperature, the continuity of the rough pressing and the fine pressing is not favorably maintained, and the synergistic effect of the two is not favorably exerted.

Each extrusion roller is connected above the coating pool in a lifting mode through a ball screw rod transmission mechanism respectively so as to realize the thickness control of the waterproof coiled material, and the ball screw rod transmission mechanism has high precision and is beneficial to the accurate control of the thickness of the waterproof coiled material.

The length of the squeeze roll is generally large, the squeeze roll with a certain length is easy to deform to a certain degree due to the action of gravity or pressure, which causes the waterproof roll to have the defects of thick middle and thin two sides, and therefore, the squeeze roll is preferably designed to have a structure with the diameter of the middle part larger than that of the two ends.

The coating device also comprises a dipping material roller which is arranged in the coating pool or can be lifted into the coating pool, and the lower surface of the waterproof coiled material is coated with asphalt. The material soaking roller is positioned between the coating pool wall and the double-straight-row extrusion forming mechanism, and a guide roller is also arranged between the material soaking roller and the coating pool wall, so that the waterproof coiled material is prevented from touching the coating pool wall and even scraping the pitch presoaked in the previous process.

The feeding side of the double-straight-row extrusion forming mechanism is also provided with a waterfall type discharging mechanism which is used for uniformly spreading asphalt on the upper surface of the waterproof coiled material. The feeding side of each pair of extrusion rollers is provided with a waterfall type blanking mechanism, and asphalt is coated on the upper surface of the waterproof roll before extrusion, so that the waterproof roll is ensured to have enough thickness and tightness.

In fact, in order to ensure that the base fabric runs smoothly in the pre-dipping device or the coating device, the various rollers, including but not limited to the squeeze roller, the coating roller, the dip roller, the pre-press roller, and the dip roller, are kept substantially parallel to each other. The vertical cross section of each roller axle of pond bottom of soaking in advance, scribbling lid pond bottom of pool perpendicular all is the V font, reduces dead angle in the pond for the pitch that gets into in the pond can be effectively utilized, reduces the capacity in pond, makes pitch can not stay in the pond just can be effectively utilized for a long time, and then improves the performance of final product, also can promote the sediment in the pitch to the lowest of V font bottom of pool under the action of gravity. The lowest position of V font pond bottom of pool is equipped with the discharge port, can in time discharge the pitch precipitate in the pond, can also further promote the sediment flow in the pitch to the lowest position of V font bottom of pool, perhaps discharges the washing sewage when wasing. The coating roller, the dipping roller, the extruding mechanism, the double-straight-row extrusion forming mechanism and the dipping roller are arranged deviating from the vertical plane where the lowest part of the V-shaped tank bottom is located, so that the sediment in the tank is prevented from being coated with the tire base cloth; the preferable coating roller and the dip coating roller, the double straight-line extrusion forming mechanism and the dip roller are respectively arranged on two sides of the lowest vertical surface of the V-shaped pool bottom, dead angles in the pool are further reduced, the capacity of the pool is reduced, and the pitch is promoted to be effectively utilized in time, so that the formation of sediment is reduced to a certain extent. And heating hearth pipes are arranged at the bottom of the tank and on the wall of the tank, so that the fluidity of the asphalt is ensured.

In the drying device, the roll wrapping rate of each drying roll is not lower than 75%, and a higher roll wrapping rate can provide more drying areas, improve the drying efficiency and the utilization rate of the drying rolls, reduce the span of equipment and further save space; more importantly, the higher roll wrapping rate is beneficial to maintaining the temperature balance of heat conducting oil in the drying roll, the phenomenon that the drying roll deforms due to expansion caused by heat and contraction caused by cold is avoided, and the service life of the equipment is prolonged.

The angle between the horizontal plane and the common plane where the first drying roller rotating shaft and the second drying roller rotating shaft are located is 60-80 degrees; the drying device is also provided with two drying guide rollers which are arranged at a distance from the first drying roller and the second drying roller respectively, so that the roller wrapping rate of the drying rollers is not lower than 75%.

Drying device still sets up in the spring frame of both sides, further prevents that waterproofing membrane from being stretched, plays the effect of buffering. The bouncing frame comprises a guide rail, a bouncing roller connected to the guide rail in a sliding manner, a spring buffering device arranged below the bouncing roller and a gravity block which is used for balancing the bouncing roller through a chain wheel mechanism.

Each drying roller is driven by a variable frequency motor respectively, and further the waterproof roll is prevented from being stretched.

The drying roller and the extrusion roller are both sandwich oil-through rollers, and heat conducting oil is introduced into the sandwich oil-through rollers; drying roller and squeeze roll design are the sandwich structure of leading to oil to the mode that adopts the conduction oil heating provides the heat for drying roller, makes drying roller's temperature be unlikely to produce the snap, and the change volume also can not be too big, effectively avoids consequently and destroys waterproofing membrane, leads to catching fire even. The temperature of heat conducting oil in an extrusion roller of the pre-soaking pool is 220 ℃, and the temperature of a roller surface is 160-190 ℃; the temperature of heat conducting oil in the drying roller is 190-220 ℃; the temperature of heat conducting oil in the extrusion roller of the coating pool is 220 ℃, and the temperature of the roller surface is 170-190 ℃.

Compared with the prior art, the invention has the following beneficial effects: the invention adopts a combined mode of presoaking, drying and coating, and the presoaking process, the drying process, the coating process, the presoaking device, the drying device and the coating device are improved to make the three more adaptive, thereby promoting the improvement of the finished product quality of the waterproof coiled material. The pre-dipping process abandons the mode of extruding the base fabric in the vertical direction in the traditional process, namely the mode of extruding the base fabric with the asphalt coated on the surface in the direction forming an acute angle with the vertical direction, namely the extruding acting force is in an inclined state, so that the part of the extruded base fabric near the extruding acting point/line/surface is also in an inclined state, the position relation of the base fabrics at two sides of the extruding acting point/line/surface is in a state of deviating from one side to the other side, and the asphalt extruded and running to two sides can be re-received by the base fabric and can not be adhered to equipment with the extruding action, thereby avoiding the defects of bubbles, surface white spots, poor water impermeability, low peeling strength and the like of a finished product. The traditional space drying mode is abandoned in the drying process, and the contact type drying is adopted, so that the drying effect is greatly improved. The extrusion mode is improved in the process of coating, the tightness and uniformity of extrusion are improved through the combination of two processes of rough pressing and fine pressing, the design concept of the drying device is continued by the double-straight-line extrusion forming mechanism, and the deformation probability can be greatly reduced while the delay uniformity is improved.

Drawings

FIG. 1 is a schematic extrusion of a dip coating process.

Fig. 2 is a schematic of a dip coating process.

Fig. 3 is a schematic diagram of the structure of a system for dip coating asphalt.

Fig. 4 is a schematic view of the structure of the prepreg device.

Fig. 5 is a schematic diagram of the pressing mechanism of fig. 4.

Fig. 6 is a schematic structural view of a three-roll press prepreg apparatus.

Fig. 7 is a schematic diagram of the pressing mechanism of fig. 6.

Fig. 8 is a schematic structural view of the drying apparatus.

Fig. 9 is a schematic view of the coating device.

Fig. 10 is a schematic view showing the operation of the twin inline extrusion molding mechanism.

FIG. 11 is a schematic view of the structure of a prepreg device in example 3.

FIG. 12 is a schematic view of the structure of a prepreg device in example 4.

FIG. 13 is a schematic view of the structure of a prepreg device in example 5.

Description of reference numerals: the device comprises an extrusion acting force F, a tire base cloth A, a friction force F, a pre-dipping tank 110, an extrusion mechanism 120, an extrusion roller 121, an upper roller 121a, a lower roller 121b, a first lower extrusion roller 1211, a first middle extrusion roller 1212, a first upper extrusion roller 1213, a support 122, a driving mechanism 1221, a coating roller 131, a dipping roller 132, a pre-pressing roller 133, a drying device 200, a first drying roller 211, a second drying roller 212, a drying guide roller 213, a bouncing frame 220, a guide rail 221, a bouncing roller 222, a spring buffer device 223, a coating device 300, a coating tank 310, a second upper extrusion roller 321, a second lower extrusion roller 322, a third upper extrusion roller 323, a third lower extrusion roller 324, a dipping roller 331, a guide roller 332, a waterfall type blanking mechanism 340 and a deviation rectifying device 400.

Detailed Description

The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention. The present invention will be described in further detail with reference to specific examples.

Example 1

As shown in fig. 1, step S1 is to get rid of the way of extruding the tire base fabric in the vertical direction, i.e. the extrusion force is parallel to the vertical direction in the conventional process, and creatively propose the way of extruding the tire base fabric with asphalt coated on the surface in the direction forming an acute angle with the vertical direction, i.e. the extrusion force is in an inclined state, so the part of the extruded tire base fabric near the extrusion point/line/surface is also in an inclined state, the tire base fabrics at both sides of the extrusion point/line/surface are in a state of one side being on the top of one side being on the bottom of one side, and the asphalt extruded and running to both sides can be re-received by the tire base fabric without being adhered to the extrusion equipment, thereby avoiding the defects of air bubbles, white spots on the surface, poor water impermeability, low peel strength and the like of the finished product. Step S2 also abandons the traditional space drying mode, and adopts contact type drying, thereby greatly improving the drying effect. Step S3 improves the extrusion mode, improves the extrusion tightness and uniformity through the combination of two processes of rough pressing and fine pressing, and the design concept of the drying device is continued by the double-straight-line extrusion forming mechanism, so that the deformation probability can be greatly reduced while the delay uniformity is improved.

As shown in fig. 2, the base fabric with asphalt coated on the surface is extruded twice in a direction forming an acute angle with the vertical direction, and the directions of the front and back surfaces of the base fabric in the two extrusion processes are opposite, so that the front and back surfaces of the coiled material or the prepreg coiled material obtained after extrusion are stressed evenly, the coiled material or the prepreg coiled material is not easy to warp, and the surface is smoother. As mentioned above, the pressing force is inclined, and the portion of the pressed base fabric near the pressing point/line/surface is also inclined, so that the front and back surfaces of the base fabric are necessarily inclined one surface up and the other surface down, and therefore the opposite directions are not absolute opposite in relation to each other, but it should be understood that: if the front surface of the tire base fabric is inclined upwards in the first extrusion, the front surface of the tire base fabric is inclined downwards in the second extrusion; and vice versa.

Example 2

As shown in fig. 3, a system for dip coating asphalt includes a pre-soaking device 100, a drying device 200, and a coating device 300, which are sequentially disposed.

The pre-dipping apparatus 100 includes a pre-dipping tank 110 for containing asphalt and dipping the tire base fabric with the asphalt, and an extruding mechanism 120 disposed above the pre-dipping tank 110 and extruding the tire base fabric dipped with the asphalt.

The squeezing mechanism 120 comprises at least two squeezing rollers 121, the rotating shafts of the two adjacent squeezing rollers 121 are parallel to each other but not in the same vertical plane, and the tire base fabric penetrates into the gap between the two adjacent squeezing rollers 121 from the lower sides of the two adjacent squeezing rollers 121 after the pre-dipping pool 110 is dipped with asphalt. As shown in fig. 5, two adjacent squeezing rollers 121 squeeze the base fabric passing through the squeezing rollers 121, and a squeezing line is formed at a position where each squeezing roller 121 squeezes the base fabric. The plane where the rotating shafts of the two adjacent squeeze rollers 121 are located is used as a separating surface, a groove with a bearing effect is formed between the two adjacent squeeze rollers 121 on the upper side of the separating surface (namely, the upper sides of the two adjacent squeeze rollers 121), and extruded asphalt is accommodated by the groove when emerging from the upper side of the separating surface when the tire base cloth is squeezed, so that the phenomenon of roller sticking caused by flowing along the roller surface is avoided. And the extruded asphalt will fall downward or flow downward along the roller surface when emerging from the lower side of the interface (i.e. the lower sides of two adjacent squeeze rollers 121), but because the squeeze rollers 121 will generally rotate along the material-moving direction of the tire base fabric, the asphalt flowing through the roller surface will be continuously reabsorbed by the tire base fabric, will not stay too long on the roller surface, so the problem of roller sticking can be solved to a great extent, thereby avoiding the defects of air bubbles, surface white spots, poor water impermeability, low peeling strength and the like of the finished product.

For higher viscosity asphalt, the extruded asphalt may stick to the squeeze rolls 121 without being reabsorbed as it emerges from the underside of the interface and runs down the roll face. For this reason, the rotation axes of the two adjacent squeezing rollers 121 are not in the same horizontal plane, and each two adjacent squeezing rollers 121 include an upper roller 121a and a lower roller 121b in a positional relationship therebetween, and the base fabric is fed from a side away from the upper roller 121a and penetrates into the gap between the upper roller 121a and the lower roller 121b from the lower side. Therefore, the lower roller 121b is wrapped on the feeding side of the tire base cloth penetrating into the gap from the lower side, the asphalt flowing down falls on the tire base cloth which is not extruded by the extruding roller 121 and cannot be adhered to the extruding roller 121, the asphalt is further prevented from being adhered to the roller, especially when the asphalt viscosity is high, the extruded asphalt falls on the tire base cloth which is not extruded by the extruding roller 121 again, the roller adhesion can be effectively prevented, the surface unevenness caused by the asphalt falling on the tire base cloth again can be avoided, the extruding effect is better, the good operation of equipment can be better kept, the maintenance frequency of the equipment is reduced, the production continuity is ensured, and the production efficiency is improved.

The squeezing mechanism 120 of the present embodiment takes three squeezing rollers 121 as an example, as shown in fig. 6, the three squeezing rollers are a first lower squeezing roller 1211, a first middle squeezing roller 1212, and a first upper squeezing roller 1213 from bottom to top, and the tire base fabric is fed from a side away from the first middle squeezing roller 1212, then passes through a nip between the first lower squeezing roller 1211 and the first middle squeezing roller 1212 from a lower side, and then passes through a nip between the first middle squeezing roller 1212 and the first upper squeezing roller 1213 from a lower side. As shown in fig. 7, the extruded asphalt flows downward or runs down along the surface of the first middle squeeze roller 1212 when emerging from the lower side of the interface (i.e. the lower side of the adjacent two squeeze rollers 121), and for the squeezing of the first lower squeeze roller 1211 and the first middle squeeze roller 1212, because the base fabric is fed from the side away from the first middle squeeze roller 1212, the first lower squeeze roller 1211 is wrapped around the feeding side of the base fabric penetrating into the nip from the lower side, and the fallen asphalt falls on the base fabric not squeezed by the first lower squeeze roller 1211 and the first middle squeeze roller 1212 and does not adhere to the first lower squeeze roller 1211, thereby further preventing the adhesion of the asphalt, especially when the asphalt is higher, the extruded asphalt falls again on the base fabric not squeezed by the first lower squeeze roller 1211 and the first middle squeeze roller 1212, and for the squeezing of the first middle squeeze roller 1212 and the first upper squeeze roller 1213, the first middle squeeze roller 1212 and the first upper squeeze roller 1212 are wrapped around the feeding side of the base fabric not squeezed by the first middle squeeze roller 1212 and the first upper squeeze roller 1213, the asphalt which flows down falls on the tire base cloth which is not extruded by the first middle extrusion roller 1212 and the first upper extrusion roller 1213 and cannot be adhered to the first middle extrusion roller 1212, so as to further prevent the asphalt from being adhered to the rollers, and especially when the viscosity of the asphalt is high, the extruded asphalt falls on the tire base cloth which is not extruded by the first lower extrusion roller 1211 and the first middle extrusion roller 1212 again, so that the adhesion of the asphalt to the rollers can be effectively prevented, the surface unevenness caused by the asphalt falling on the tire base cloth again can be avoided, the extrusion effect is better, the good operation of the equipment can be better kept, the maintenance frequency of the equipment is reduced, the continuity of production is ensured, and the production efficiency is improved. Therefore, three-roll extrusion is more advantageous than two-roll extrusion, and the base fabric is extruded twice on the front and back surfaces of the three extrusion rolls 121, so that the front and back surfaces of the coiled material or the pre-impregnated coiled material obtained after extrusion are stressed evenly, are not easy to warp, and have a smoother surface.

The pressing mechanism 120 further includes a frame 122, the first lower pressing roller 1211 and the first upper pressing roller 1213 are connected to the bottom and the top of the inside of the frame 122, respectively, and the first middle pressing roller 1212 is connected to the sidewall of the inside of the frame 122. The first lower extrusion roller 1211 and the first upper extrusion roller 1213 are respectively connected to the bottom and the top of the inner side of the bracket 122 in a lifting manner, and when in use, the heights of the first lower extrusion roller 1211 and the first upper extrusion roller 1213 can be respectively adjusted according to the performance requirements of the coiled material, so that the distance between the gaps with the extrusion effect between the three extrusion rollers 121 can be adjusted, and the distance between any two adjacent extrusion rollers 121 can be adjusted at will. More preferably, a driving mechanism 1221 for driving the first lower pressure roller 1211 to move up and down is disposed at the bottom of the frame 122, and a driving mechanism 1221 for driving the first upper pressure roller 1213 to move up and down is disposed at the top of the frame 122, so that the distance between the nips for pressing between the three pressure rollers 121 can be adjusted more accurately and conveniently. Besides the foregoing solutions adopted in this embodiment, there may be another solution: the first middle squeezing rollers 1212 are movably connected to the inner side wall of the bracket 122, so that the first middle squeezing rollers 1212 can be horizontally displaced according to the performance requirement of the coiled material when in use, thereby adjusting the distance between the three squeezing rollers 121 for squeezing, and the positional relationship between the three squeezing rollers 121 can be adjusted at the same time only by adjusting the position of the first middle squeezing rollers 1212.

Preferably, the included angle between the plane where the rotating shafts of the two adjacent squeezing rollers 121 are located and the vertical plane is 5-80 degrees; more preferably, the included angle between the plane where the rotating shafts of two adjacent squeezing rollers 121 are located and the vertical plane is 10 to 60 °. The included angle between the plane where the rotating shafts of the two adjacent squeezing rollers 121 are located and the vertical plane is not too small, otherwise, all the extruded asphalt which is extruded from the upper side of the interface cannot be accommodated in the groove with the bearing effect formed between the two adjacent squeezing rollers 121; the included angle is not too large, otherwise, even if the lower roller 121b is wrapped by the feeding side of the base fabric penetrating into the gap from the lower side, the asphalt extruded and emerging from the lower side of the interface can directly fall onto other extruding rollers 121 at lower positions; the size of the included angle is closely related to the viscosity, density, dip coating and extrusion amount of the asphalt, and the included angle needs to be adjusted according to specific conditions.

An extrusion action line for extruding the tire base cloth is formed between two adjacent extrusion rollers 121, and the distance between the extrusion action line and a vertical plane where the rotating shafts of the extrusion rollers 121 are located is 50-150 mm.

As shown in fig. 2, the drying device 200 includes two drying rollers and a bouncing frame 220 disposed at both sides. The two drying rollers are arranged at a distance, are independently driven and have heat, the drying rollers are sandwich oil-conducting rollers, heat conducting oil is conducted in the sandwich oil-conducting rollers, and the temperature of the heat conducting oil ranges from 190 ℃ to 220 ℃. Two stoving rollers are driven by different actuating mechanism respectively, even if viscosity is under high temperature under the circumstances that the improvement greatly can not lead to waterproofing membrane by tensile deformation yet, such setting has avoided two stoving rollers to constitute the effect of dragging to the waterproofing membrane that is located between the two on the one hand, on the other hand is equivalent to that the waterproofing membrane before drying and after drying provides the tension buffer in the stoving stage, thereby effectively prevent waterproofing membrane by constantly stretching and take place to warp in process of production. In addition, traditional separated drying mode has been abandoned to this embodiment, adopts the contact stoving, has improved the effect of stoving greatly.

The roll wrapping rate of each drying roll is not lower than 75%, and a higher roll wrapping rate can provide more drying areas, improve the drying efficiency and the utilization rate of the drying rolls, reduce the span of equipment and further save space; more importantly, the higher roll wrapping rate is beneficial to maintaining the temperature balance of heat conducting oil in the drying roll, the phenomenon that the drying roll deforms due to expansion caused by heat and contraction caused by cold is avoided, and the service life of the equipment is prolonged. The two drying rollers are respectively a first drying roller 211 and a second drying roller 212 with heat; the angle between the horizontal plane and the common plane where the rotating shaft of the first drying roller 211 and the rotating shaft of the second drying roller 212 are positioned is 60-80 degrees; the drying device 200 is further provided with two drying guide rollers 213 which are arranged at a distance from the first drying roller 211 and the second drying roller 212 respectively, so that the roller wrapping rate of the drying rollers is not lower than 75%. The bouncing frame 220 comprises a guide rail 221, a bouncing roller 222 slidably connected to the guide rail, a spring buffering device 223 arranged below the bouncing roller, and a gravity block weighted by the bouncing roller through a chain wheel mechanism, so that the waterproof roll is further prevented from being stretched, and a buffering effect is achieved.

As shown in fig. 4, the coating device 300 comprises a coating tank 310, a double straight row extrusion forming mechanism arranged above the coating tank 310, a dipping roller 331 arranged in the coating tank 310 or capable of lifting into the coating tank 310, and a waterfall type blanking mechanism 340 arranged at the feeding side of the double straight row extrusion forming mechanism.

The coating tank 310 is used to contain and/or receive asphalt. The double-direct-discharge extrusion forming mechanism comprises two pairs of extrusion rollers which are arranged in pairs at intervals and have heat, the extrusion rollers are sandwich oil-passing rollers, heat conducting oil is introduced into the sandwich oil-passing rollers, the temperature of the heat conducting oil is 220 ℃, the temperature of the surface of the roller is 170-190 ℃, asphalt at the contact part is further softened during extrusion, air is extruded more quickly, gaps are filled, and bubbles are prevented from being generated. As shown in fig. 5, the two pairs of squeezing rollers are respectively a second upper squeezing roller 321 and a second lower squeezing roller 322 for rough squeezing and a third upper squeezing roller 323 and a third lower squeezing roller 324 for fine squeezing, the rotation speed of the second upper squeezing roller 321 is higher than that of the third upper squeezing roller 323, the rough squeezing on the waterproof coiled material is realized under the squeezing action of the second upper squeezing roller 321 and the second lower squeezing roller 322 with higher rotation speed, the fine squeezing on the waterproof coiled material is realized under the squeezing action of the third upper squeezing roller 323 and the third lower squeezing roller 324 with relatively lower rotation speed, the squeezing tightness and uniformity are improved by the combination of the two steps of rough squeezing and fine squeezing, and the design concept of the drying device 200 is continued by the double straight-row squeezing mechanism, so that the deformation probability can be greatly reduced while the delay uniformity is improved; the rotation speed v of the second upper squeeze roller 321₁₁Is lower than the rotating speed v of the second lower extrusion roller 322₁₂Large, the rotational speed v of the third upper press roll 323₂₁Is lower than the rotating speed v of the third lower extrusion roller 324₂₂Small, a speed difference is formed between the upper and lower squeeze rollers, so that the second upper squeeze roller 321 has a scraping effect on the upper surface of the waterproof roll, and the third upper squeeze rollerThe compression roller 323 has a compaction effect on the upper surface of the waterproof coiled material, has a certain degree of compaction while being stricken, and also has a certain degree of strickling while being strickled, so that the tightness uniformity of the waterproof coiled material is further improved; rotation speed v of second lower squeeze roller 322₁₂And the rotating speed v of the third lower extrusion roller 324₂₂The consistency is basically kept, and the continuous compaction action on the lower surface of the waterproof roll is kept; each extrusion roller is respectively driven by four large-torque servo motors. At squeeze roll and waterproofing membrane contact department, squeeze roll 321's linear velocity direction is the same with waterproofing membrane's moving direction on the second, squeeze roll 322's linear velocity direction is opposite with waterproofing membrane's moving direction under the second, squeeze roll 323's linear velocity direction is the same with waterproofing membrane's moving direction on the third, squeeze roll 324's linear velocity direction is opposite with waterproofing membrane's moving direction under the third. In other words, the rotating directions of all the extrusion rollers are kept consistent, and the upper extrusion roller forms a friction force which is consistent with the trend of the waterproof roll on the waterproof roll at the contact part of the upper extrusion roller and the waterproof roll, so that the waterproof roll is pushed to move forwards; the lower squeeze roll forms a friction force opposite to the direction of the waterproof coiled material at the contact part of the lower squeeze roll and the waterproof coiled material, and a certain leveling effect is formed while the lower squeeze roll is compacted.

The distance between the two pairs of extrusion rollers is not more than 60cm, and the distance is too large, so that the compaction is not favorably finished at proper temperature, the continuity of the rough pressing and the fine pressing is not favorably maintained, and the synergistic effect of the two is not favorably exerted. Each extrusion roller is connected above the coating pool 310 in a lifting mode through a ball screw transmission mechanism respectively so as to achieve thickness control of the waterproof coiled material, and the ball screw transmission mechanism has high precision and is beneficial to precise control of the thickness of the waterproof coiled material. The length of the squeeze roll is generally large, the squeeze roll with a certain length is easy to deform to a certain degree due to the action of gravity or pressure, which causes the waterproof roll to have the defects of thick middle and thin two sides, and therefore, the squeeze roll is preferably designed to have a structure with the diameter of the middle part larger than that of the two ends. The dipping roll 331 is mainly used for coating asphalt on the lower surface of the waterproof roll. The dipping roller 331 is positioned between the wall of the coating tank 310 and the double straight-row extrusion forming mechanism, and a guide roller 332 is also arranged between the dipping roller 331 and the wall of the coating tank 310 to prevent the waterproof coiled material from touching the wall of the coating tank 310 and even scraping the asphalt presoaked in the previous process. Waterfall formula unloading mechanism 340 spreads pitch for waterproofing membrane upper surface is even. The feeding side of each pair of extrusion rollers is provided with a waterfall type blanking mechanism 340, and asphalt is coated on the upper surface of the waterproof roll before extrusion, so that the waterproof roll is ensured to have enough thickness and tightness.

Example 3

The present embodiment is different from embodiment 2 in that, as shown in fig. 11, the present embodiment further includes a coating roller 131 disposed on one side of the pressing mechanism 120 and at least partially extending into the pre-dipping tank 110 to contact with the asphalt, the base fabric enters the pre-dipping device from the side of the coating roller 131 far away from the pressing mechanism 120 and sequentially passes through the coating roller 131 and the pressing mechanism 120 and then leaves the pre-dipping device, and the asphalt in the pre-dipping tank 110 is brought upwards and coated on the lower surface of the base fabric passing through the coating roller 131 during the rotation of the coating roller 131. In the scheme, the base fabric does not need to enter the asphalt in the pre-dipping tank 110, and the base fabric crosses the coating roller 131 and keeps effective contact with the coating roller 131 in the process, so that the lower surface of the base fabric is coated with the asphalt when crossing the coating roller 131, and finally the half-stuffing waterproof roll in the traditional sense is formed. Preferably, the surface of the coating roller 131 is a sand surface structure, which helps to bring asphalt upwards better during the rotation of the coating roller 131, so as to better ensure that the tire base fabric can be coated with an asphalt layer with a thickness meeting the requirement.

Example 4

The present embodiment is different from embodiment 2 in that, as shown in fig. 12, the present embodiment further includes an impregnation roller 132 at least partially extending into the asphalt in the pre-impregnation tank 110, and the tire base fabric enters the pre-impregnation device, extends into the pre-impregnation tank 110 from one side of the impregnation roller 132, then extends out from the other side of the impregnation roller 132, and exits the pre-impregnation device after being pressed by the pressing mechanism 120. In the scheme, the base fabric needs to completely enter the asphalt in the pre-soaking pool 110, and the soaking roller 132 is used for pressing the base fabric to the asphalt so as to completely soak the base fabric in the process, so that the conventional full-tire waterproof roll is finally formed. Preferably, the dip-coating roller 132 is a hollow structure, and the dip-coating roller 132 with the hollow structure can play a role in stirring the asphalt in the pre-dip tank 110 when rotating, so as to ensure the uniformity of the asphalt, and meanwhile, the dip-coating roller 132 with the hollow structure occupies a smaller absolute space, so that the effective accommodating space for dip-coating is increased, and the miniaturization of equipment is facilitated. Preferably, the dipping rollers 132 can be lifted and extended into the pre-dipping tank 110, and the dipping rollers 132 can be lifted when the pre-dipping tank 110 is cleaned, so that later maintenance or repair is facilitated. Preferably, the tire base fabric comprises two spaced-apart soaking rollers 132 and a pair of pre-pressing rollers 133, the tire base fabric is pre-pressed by the pre-pressing rollers 133 after passing through one soaking roller 132, then passes through the other soaking roller 132, and then enters the extrusion mechanism 120 for extrusion, so that the tire base fabric can be soaked, and a better dipping effect can be achieved.

Example 5

The present embodiment is different from embodiment 2 in that, as shown in fig. 13, the present embodiment further includes a coating roller 131 and an immersion roller 132, the coating roller 131 is disposed on a side of the pre-immersion tank 110 away from the pressing mechanism 120, and the immersion roller 132 is disposed between the coating roller 131 and the pressing mechanism 120. The scheme is the synthesis of the two schemes, and a user can select any one dip-coating mode of a coating mode or a dip-coating mode according to needs. The coating roller 131 is arranged on one side of the pre-dipping tank 110, when the base fabric enters the pre-dipping device, the base fabric passes through the coating roller 131, whether a coating mode is selected or not, the coating roller 131 can support the base fabric, the edge of the pre-dipping tank 110 is prevented from being scraped by the base fabric, the base fabric can be deformed seriously, and the edge of the pre-dipping tank 110 is more likely to be scraped particularly in the dipping mode. Reference may be made to examples 3 and 4, respectively, for preferred embodiments of the coating roll 131 and the impregnation roll 132, respectively.

In order to ensure smooth travel of the tire base fabric in the prepreg apparatus 100 or the coating apparatus 200, the various rollers including, but not limited to, the squeeze roller 121, the coating roller 131, the dip roller 132, the pre-press roller 133, and the dip roller 331 are substantially kept parallel to each other. The vertical cross section of the vertical roller shafts of the pre-dipping pool 110 and the coating pool 310 is V-shaped, so that dead angles of the pre-dipping pool are reduced, asphalt entering the pool can be effectively utilized, the capacity of the pool is reduced, the asphalt cannot stay in the pool for too long time and can be effectively utilized, the performance of a final product is improved, and the sediment in the asphalt can be promoted to flow to the lowest position of the V-shaped pool bottom under the action of gravity. The lowest position of V font pond bottom of pool is equipped with the discharge port, can in time discharge the pitch precipitate in the pond, can also further promote the sediment flow in the pitch to the lowest position of V font bottom of pool, perhaps discharges the washing sewage when wasing. The coating roller 131, the dipping roller 132, the extrusion mechanism 120, the double-straight-line extrusion forming mechanism and the dipping roller 331 are arranged deviating from the vertical plane where the lowest part of the V-shaped pool bottom is located, so that the sediment in the pool is prevented from being coated with the tire base cloth; preferably, the coating roller 131 and the dipping roller 132, and the double straight-line extrusion forming mechanism and the dipping roller 331 are respectively arranged on two vertical sides of the lowest position of the V-shaped tank bottom, so that the dead angle of the pre-dipping tank is further reduced, the capacity of the tank is reduced, the asphalt is promoted to be effectively utilized in time, and the formation of precipitates is reduced to a certain extent. The pool bottom and the pool wall are both provided with heating chamber pipes, so that the fluidity of the asphalt is ensured.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. a technique for dipping asphalt, for dipping asphalt in tire base cloth to make tire waterproofing membrane, it is characterized in that, comprise the steps:

S1. Prepreg: Coating asphalt on the surface of the tire base fabric or dipping the tire base cloth into the asphalt so that the asphalt covers the surface of the tire base cloth, and then in the direction forming an acute angle with the vertical direction to the surface of the tire base covered with asphalt The cloth is squeezed;

S2. Drying: drying the prepreg base treated in step S1 by contacting the rolling heating element;

S3. Coating: Coat asphalt on the surface of the prepreg base treated in step S2 or immerse the prepreg base in the asphalt so that the asphalt covers the surface of the prepreg base, and then use a high-speed rolling heating element for rough pressing before use Roll the heating element at low speed for precise pressing.

2. The process for dipping asphalt according to claim 1, characterized in that, in step S1, the tire base cloth covered with asphalt on the surface is squeezed twice in the direction forming an acute angle with the vertical direction, and the tire base cloth is extruded twice. During the two extrusion processes, the front and back sides are oriented oppositely.

3. A system for dipping and coating asphalt, characterized in that it comprises a prepreg device, a drying device and a coating device arranged in sequence; the prepreg device includes a system for holding asphalt and dipping asphalt for the tire base fabric. A pre-soak pool and a pressing mechanism arranged above the pre-soak pool and extruding the tire base cloth dipped in asphalt The axes are parallel to each other but not in the same vertical plane, and the tire base fabric penetrates into the gap between the two adjacent squeeze rolls from the underside of the two adjacent squeeze rolls after dipping the asphalt in the prepreg pool; the drying The drying device includes two drying rollers with heat, which are arranged at a distance and independently driven; the coating device includes a coating pool for holding and/or receiving asphalt, and a double-straight extruder set above the coating pool. A compression molding mechanism, the double in-line extrusion molding mechanism includes two pairs of squeeze rollers that are spaced apart and have heat, and are respectively a second upper squeeze roller and a second lower squeeze roller for rough pressing. And the third upper squeezing roller and the third lower squeezing roller for precision pressing, the rotation speed of the second upper squeezing roller is larger than that of the third upper squeezing roller.

4. The system for dipping asphalt according to claim 3, characterized in that, the rotating shafts of two adjacent squeeze rollers are not in the same horizontal plane, and the positional relationship between each adjacent two squeeze rollers includes: The upper and lower rollers, the tire base fabric is fed from the side away from the upper roller and passed through the gap between the upper and lower rollers from the lower side.

5. The system for dipping and coating asphalt according to claim 4, characterized in that the extrusion mechanism comprises three extrusion rollers, from bottom to top are the first lower extrusion roller, the first middle extrusion roller and the first extrusion roller. An upper extrusion roller, the tire base fabric is fed from the side away from the first middle extrusion roller, and then passes through the gap between the first lower extrusion roller and the first middle extrusion roller from the lower side, and then passes through the gap between the first lower extrusion roller and the first intermediate extrusion roller from the bottom. The side passes through the nip between the first middle squeezing roll and the first upper squeezing roll.

6 . The system for dipping asphalt according to claim 3 , wherein the rotational speed of the second upper squeezing roll is greater than that of the second lower squeezing roll, and the rotational speed of the third upper squeezing roll is higher than that of the third upper squeezing roll. 7 . The rotational speed of the third lower squeeze roller is small.

7 . The system for dipping asphalt according to claim 6 , wherein the rotational speed of the second lower pressing roller is equal to the rotational speed of the third lower pressing roller. 8 .

8. The system for dipping asphalt according to claim 7, characterized in that, at the point where the squeezing roller contacts the waterproofing membrane, the linear velocity direction of the second upper squeezing roller is the same as the moving direction of the waterproofing membrane, The linear velocity direction of the second lower squeezing roll is opposite to the moving direction of the waterproof membrane, the linear velocity direction of the third upper squeezing roll is the same as the moving direction of the waterproof membrane, and the third lower squeezing roll The direction of the line speed is opposite to the moving direction of the waterproof membrane.

9 . The system for dipping asphalt according to claim 3 , wherein the wrapping rate of each drying roller is not less than 75%. 10 .

10. The system for dipping and coating asphalt according to claim 3, wherein the drying roller and the squeezing roller are both sandwich oil-passing rolls, and heat-conducting oil is passed through them.