阅读说明：本技术 一种无钢丝和帘子布的一体硫化免充气橡胶轮胎 (Integrated vulcanized non-pneumatic rubber tire without steel wires and cord fabric ) 是由 袁征 于 2020-08-05 设计创作，主要内容包括：本发明涉及一种无钢丝和帘子布的一体硫化免充气橡胶轮胎,包括轮胎,橡胶轮胎沿着径向由外向内依次设置有胎体外层、交联层和胎芯发泡层；其中胎体外层和胎芯发泡层,之间通过交联层实现两者的紧密交联融合连接,胎体外层、交联层和胎芯发泡层是采用两种不同材质的发泡条和条状胎面料经过复合和硫化成型工艺最终形成的一体式硫化轮胎结构。本发明克服了现有技术的不足,设计合理,结构紧凑,解决了现有的充气轮胎特别是电动车摩托车轮胎容易爆胎,防滑效果不佳以及挺性不足的问题,本发明采用了发泡胎芯替代传统充气轮胎,防止爆胎,提高轮胎的使用寿命；同时,还能提高轮胎的挺性,具有很强的实用性。(The invention relates to an integrally vulcanized inflation-free rubber tire without steel wires and cord fabric, which comprises a tire, wherein the rubber tire is sequentially provided with a tire body outer layer, a cross-linking layer and a tire core foaming layer from outside to inside along the radial direction; the outer layer of the tyre body, the cross-linking layer and the foaming layer of the tyre core are in tight cross-linking fusion connection through the cross-linking layer, and the outer layer of the tyre body, the cross-linking layer and the foaming layer of the tyre core are of an integrated vulcanized tyre structure finally formed by adopting two foaming strips and strip-shaped tyre surface materials made of different materials through compounding and vulcanization molding processes. The invention overcomes the defects of the prior art, has reasonable design and compact structure, solves the problems that the prior pneumatic tire, particularly the tire of an electric vehicle and a motorcycle is easy to burst, has poor anti-skid effect and insufficient stiffness, adopts the foaming tire core to replace the traditional pneumatic tire, prevents the burst, and prolongs the service life of the tire; meanwhile, the stiffness of the tire can be improved, and the practicability is high.)

1. An integrally vulcanized inflation-free rubber tire without steel wires and cord fabrics, which comprises a tire and is characterized in that,

the rubber tire is sequentially provided with a tire body outer layer (58), a cross-linking layer (54) and a tire core foaming layer (56) from outside to inside along the radial direction;

the tire body outer layer (58), the cross-linking layer (54) and the tire core foaming layer (56) are formed by adopting two different rubber materials through compounding and vulcanization processes, wherein the tire body outer layer (58) and the tire core foaming layer (56) are in tight cross-linking fusion connection through the cross-linking layer (54), and finally an integrally vulcanized inflation-free rubber tire structure of the tire body outer layer (58), the cross-linking layer (54) and the tire core foaming layer (56) is formed.

2. A integrally vulcanized non-pneumatic rubber tire without steel wires and cord fabric as claimed in claim 1, wherein the core foam layer (56) has a plurality of fine closed cells (55) therein which are independent of each other and closed.

3. A unitarily vulcanized non-pneumatic rubber tire without cords and cords as in claim 1, wherein the core foam layer is foamed to form a central hole (57).

4. A integrally vulcanized non-pneumatic rubber tire without steel cords and cord fabric according to claim 1, wherein said foam strip is a foam strip (20) extruded into a hollow strip shape by a rubber extruder through a foam material.

5. The integrally vulcanized non-pneumatic rubber tire without steel wires and cord fabric as claimed in claim 1, wherein the specific compounding process comprises:

the foaming strip (20) is placed at an inlet (41) of a compound machine (40) connected with a rubber extruder and is inserted into a cavity (42) at the center of the foaming strip, a strip-shaped tire fabric (10) is placed at an inlet (31) of the rubber extruder (30), the strip-shaped tire fabric (10) is gradually formed into a dough shape from a strip shape under the pushing of a screw rod (61) of the rubber extruder (30) and enters the cavity (42) of the compound machine (40) communicated with the rubber extruder, then a conical cavity structure (44) is arranged at the position of an inner cavity of the compound machine close to an outlet (43), the dough-shaped tire fabric (10) generates extrusion force under the thrust action of the conical structure (44) of the compound machine and the screw rod of the extruder, the outer circle of the foaming strip (20) arranged in the cavity (42) is tightly wrapped, and the foaming strip (10) and the foaming strip (20) are extruded out of the compound machine after being compounded under the continuous pushing of the screw rod (61) of the rubber extruder, the composite rubber pipe (59) compounded by more than two times of the two different mixed rubber materials is formed.

6. The integrally vulcanized non-pneumatic rubber tire without steel wires and cord fabric as claimed in claim 1, wherein the vulcanization molding process comprises: cutting a composite rubber tube and carrying out butt joint and closing hot connection at two ends, then placing the composite rubber tube into an integrated vulcanizing machine, maintaining the pressure of the interior of the composite rubber tube by controlling the vulcanizing temperature and the vulcanizing time, controlling the vulcanizing time, under the pressure and the temperature, mutually vulcanizing two different mixed rubber materials, namely tread rubber (51) and tire core rubber, and generating a crosslinking reaction to form a crosslinking layer (54), under the transmission of the mold temperature, the tire core rubber material starts to vulcanize and foam to form a tire core rubber layer (56), completing the manufacture of the inflation-free tire, and finally, opening the mold to take out the molded integrated vulcanized tire.

Technical Field

The invention relates to the technical field of inflation-free rubber tire equipment, in particular to an integrally vulcanized inflation-free rubber tire without steel wires and cord fabric.

Background

The tire is a circular ring-shaped elastic rubber product which is assembled on various vehicles or machines and rolls in a grounding mode, and with the rapid development of the automobile industry, the mining industry, the coal mining industry and the metal smelting industry in China, the demand of the tire is larger and larger, and the requirement on the quality of the tire is higher and higher.

Most of the current tires adopt inflatable tires, the tires have good damping effect when in use and relatively low walking resistance, but have great limitations, such as easy puncture by sharp objects to cause serious accidents, and the inflatable tires have poor bearing capacity, are not suitable for military use and have relatively low application range. The traditional tire is formed by laminating steel wires, cord fabric and each layer of colloid, the recycling rate is low, and the waste pneumatic tire cannot be recycled and is not environment-friendly.

And the non-pneumatic tires are mostly injected with foaming materials into the tire surface in an injection mode, the foaming materials are generally polyurethane, and the polyurethane foaming materials are used for replacing the traditional inner tube so as to achieve the non-pneumatic solid tires.

The inflation-free solid tire has the following problems in the actual use process:

1. the foaming multiplying power of the polyurethane foaming agent is difficult to control, if the foaming multiplying power is too large, the tire tread is easy to expand and crack, if the foaming multiplying power is too small, the air pressure of the tire is similar to that of an inflatable tire, the stress is uneven, the dynamic balance is influenced, the acting force on the tire tread is not even enough during foaming, the tire tread is not full enough, the stress is uneven when the tire is used, and the dynamic balance is influenced.

2. The foaming layer and the tire tread are not contacted tightly enough during foaming, the contact effect is poor, the peeling and the separation are easy to occur, and the requirement of the tire with the speed of 20 yards or above is not met.

3. The polyurethane material is expensive, which results in the solid tire being expensive and inconvenient to implement.

To this end, we propose an integrally vulcanized non-pneumatic rubber tire without steel cords and cord fabric.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an integrally vulcanized inflation-free rubber tire without steel wires and cord fabric, which overcomes the defects of the prior art, has reasonable design and compact structure, solves the problems that the existing pneumatic tire, particularly the tire of an electric vehicle and a motorcycle is easy to blow out, has poor anti-skidding effect and insufficient stiffness, adopts a foaming tire core to replace the traditional pneumatic tire, prevents tire blow out and prolongs the service life of the tire; meanwhile, the stiffness of the tire can be improved, and the practicability is high.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an integrally vulcanized inflation-free rubber tire without steel wires and cord fabrics, which comprises a tire and is characterized in that,

the rubber tire is sequentially provided with a tire body outer layer, a cross-linking layer and a tire core foaming layer from outside to inside along the radial direction;

the tyre outer layer, the cross-linking layer and the tyre core foaming layer are formed by adopting two different rubber materials through compounding and vulcanizing processes, wherein the tyre outer layer and the tyre core foaming layer are in close cross-linking fusion connection through the cross-linking layer, and finally the integrated vulcanization inflation-free rubber tyre structure of the tyre outer layer, the cross-linking layer and the tyre core foaming layer is formed.

Furthermore, a plurality of mutually independent and closed fine closed holes are formed in the tire core foaming layer.

Furthermore, a central hole is formed after the tire core foaming layer is foamed.

Further, the foaming strip is a hollow strip-shaped foaming strip extruded by foaming materials through a rubber extruder.

Further, the specific compounding process is as follows:

the foaming strip is placed at an inlet of a compound machine connected with a rubber extruder and is inwards inserted into a cavity in the center of the compound machine, the strip-shaped tire fabric is placed at the inlet of the rubber extruder, the strip-shaped tire fabric is gradually formed into a dough from strips under the pushing of a screw rod of the rubber extruder and enters the cavity of the compound machine communicated with the rubber extruder, then a conical cavity structure is arranged in the inner cavity of the compound machine close to the outlet, the extrusion force generated by the dough-shaped tire fabric under the thrust action of the conical structure of the compound machine and the screw rod of the extruder tightly wraps the excircle of the foaming strip arranged in the cavity, and under the continuous pushing of the screw rod of the rubber extruder, the tire tread material and the foaming strip are compounded and then extruded out of the compound machine to form the compound rubber tube with more than two layers compounded by more than two different mixed.

Further, the vulcanization molding process comprises the following steps: cutting a composite rubber tube and carrying out butt joint and closing thermal connection on two ends of the composite rubber tube, then placing the composite rubber tube into an integrated vulcanizing machine, applying air pressure to the inside of the composite rubber tube for pressure maintaining after die assembly is carried out by controlling the vulcanizing temperature and the vulcanizing time, carrying out mutual vulcanization on two different mixed rubber materials, namely, tread rubber and tire core rubber and generating a crosslinking reaction to form a crosslinking layer under the pressure and the temperature, carrying out vulcanization and foaming on the tire core rubber material under the transmission of the mold temperature to form a tire core foaming layer, completing the manufacturing of the inflation-free tire, and finally opening the mold to take out the molded integrated vulcanized tire.

Has the advantages that:

the embodiment of the invention provides a production and manufacturing process of an integrally vulcanized non-pneumatic rubber tire without steel wires and cord fabric. The method has the following beneficial effects:

1. the tire manufactured according to the process is a recyclable green product, the foaming inflation-free tire is free of cord fabric and steel wire rings, completely takes natural rubber and synthetic gluing reclaimed rubber as main raw materials, each tire can be recycled by 100% after being used, the recycled waste tire is crushed and desulfurized, then the reclaimed rubber is manufactured again and recycled, and the problem that the existing waste inflation tire cannot be recycled and is not environment-friendly is thoroughly solved.

2. The bearing capacity can be improved, the tire tread is full and elastic, the stress is more uniform, and the dynamic balance effect is improved. The foaming material with the main component of the regenerated rubber is adopted, the foaming multiplying power is stable and convenient to control during foaming, the foaming strips are tightly attached to the tire fabric, and the force applied to the tire fabric is more uniform in the foaming process, so that the tire tread is fuller and has elasticity; the performance of the tire can be determined according to the foaming time of the foaming strips, when the foaming strips are long, the inner cavity of the tire is in a solid state, the bearing capacity can be improved, when the foaming strips are short, a few vacant positions are reserved in the inner cavity of the tire, the bearing capacity is slightly reduced, and the elastic performance can be improved.

3. The foaming strip and the tread material can be combined more tightly, and the separation and the peeling are prevented. Under the vulcanization effect of the vulcanizing agent under the same condition, the outer surface of the foaming strip and the inner wall of the tire tread material are vulcanized and then are subjected to crosslinking fusion, so that the contact effect is improved, and the separation is prevented.

4. The foaming material with the main component of the regenerated rubber is adopted, so that the overall price of the tire is reduced, the resource recycling is realized, the environment is protected, and the economic cost can be reduced.

5. Because the foaming material is adopted to replace the traditional inflatable inner tube, the risk of tire burst is avoided.

6. The flame retardant is added into the foaming material and the tire fabric, so that the flame retardant effect is improved, the safety performance is improved, the tire fabric is conveniently applied to the field of military industry, and meanwhile, the rubber plastic and the fiber material are added into the tire fabric, so that the mechanical strength and the tearing strength are improved, the bearing capacity is improved, the tire fabric is suitable for large-scale mechanical equipment, and the application range is enlarged.

7. Foaming and crosslinking are carried out in the same time of vulcanization, so that the production efficiency of the tire is improved.

8. Because the tire core foaming layer is internally provided with a plurality of mutually independent and closed holes, the tire can realize the anti-pricking and anti-explosion effects when meeting poor road surface environment.

9. The foaming inflation-free tire has no cord fabric or steel wire (the existing tire and the inflation-free tire have the structure), so the manufacturing process is obviously simplified, and more energy consumption of personnel stations and operation is saved.

Drawings

FIG. 1 is a schematic cross-sectional view of a tire of the present invention after molding.

FIG. 2 is a schematic view of the process of the present invention.

FIG. 3 is a schematic illustration of the manufacture of the composite compound of the present invention.

FIG. 4 is a schematic view of the composite hose of the present invention.

FIG. 5 is a schematic representation of the cross-linking process of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An integrally vulcanized inflation-free rubber tire without steel wires and cord fabric comprises a tire, wherein the tire is sleeved on a hub, and as shown in the figure, the rubber tire is sequentially provided with a tire body outer layer 58, a cross-linking layer 54 and a tire core foaming layer 56 from outside to inside along the radial direction;

the carcass outer layer 58, the crosslinking layer 54 and the tire core foaming layer 56 are formed by adopting two different rubber materials through compounding and vulcanization processes, wherein the carcass outer layer 58 and the tire core foaming layer 56 are tightly crosslinked, fused and connected through the crosslinking layer 54, and finally the integral inflation-free rubber tire structure of the carcass outer layer 58, the crosslinking layer 54 and the tire core foaming layer 56 is formed.

The tire core foaming layer 56 is internally provided with a plurality of mutually independent and closed tiny closed holes 55, when the tire runs to a road surface containing nails or sharp objects in the running process, the nails can only embed and influence the action parts due to mutual independence among the closed holes, the surrounding tire structure can not be influenced by the action of the nails, when the nails are pulled out, the tire has no influence on the service performance of the whole tire due to the elasticity of the tire and the support of a plurality of air holes, the closed holes are of a circular, oval or special-shaped hole structure, the size and the size of the holes are controlled within 3mm, so that the tire has good stiffness, the diameter of a central hole 57 after the tire core foaming layer is controlled to be more than 2mm, or the diameter of the central hole can be reduced to 0mm according to the foaming condition.

The two different rubbers are adopted, the rubber is used as a foaming material, the elastic property of the rubber is higher, the elasticity of the tire is improved,

referring to the attached figures 1-5, the motor is 60, and the motor provides driving force for a screw 61, and the production and manufacturing process of the composite type foaming inflation-free rubber tire is characterized by comprising the following steps:

step one S1, preparing a foaming material: the method is characterized in that the regenerated rubber is taken as a main body (100 parts), meanwhile, the natural rubber (10 parts), the foaming agent (4 parts), the rubber auxiliary agent (8 parts) and the vulcanizing agent (3 parts) are added on rubber mixing equipment, and the raw materials are mixed and prepared into a strip-shaped foaming material at the temperature of 150-170 ℃ and under the air pressure of 0.5-1 MPa for later use.

Step two S2, manufacturing the tire fabric: the strip tire fabric 10 is prepared by plasticating and mixing 60 parts of natural rubber, 40 parts of synthetic rubber, 8 parts of rubber auxiliary agent, 3.5 parts of rubber plastic and 3 parts of vulcanizing agent on rubber mixing equipment at the temperature of 150-170 ℃ and the air pressure of 0.5-1 MPa, wherein the rubber plastic adopts high styrene and can improve the mechanical strength and the tearing strength of the tire.

The natural rubber adopts granular rubber or smoked sheet rubber natural rubber materials, the regenerated rubber adopts fine regenerated rubber materials, the synthetic rubber adopts butadiene styrene rubber or butadiene rubber synthetic rubber, the rubber auxiliary agent adopts one or more of rubber auxiliary agent components such as an anti-aging agent, an accelerator and zinc oxide, and the vulcanizing agent and the foaming agent both adopt conventional materials used for rubber tires.

Step three S3, manufacturing the foaming strip: extruding the foaming material prepared in the step I S1 into a hollow strip-shaped foaming strip 20 through a rubber extruder; the blowing agent in the foam strip of this step does not react.

Step four S4, preparing a composite sizing material:

placing the foaming strip 20 prepared in the step three into an inlet 41 of a compound machine 40 connected with a rubber extruder, inserting the foaming strip into a cavity 42 at the center of the foaming strip, setting the temperature in the compound machine at 60-120 ℃,

the strip-shaped tire fabric 10 is put into an inlet 31 of a rubber extruder 30, the strip-shaped tire fabric 10 is gradually formed into a dough shape from a strip shape under the pushing of a screw 61 of the rubber extruder 30 and enters a cavity 42 of a compound machine 40 communicated with the rubber extruder, then a conical cavity structure is arranged in an inner cavity of the compound machine close to an outlet 43, the dough-shaped tire tread material 10 generates an extrusion force under the thrust action of the conical structure of the compound machine and the screw of the extruder to tightly wrap the outer circle of a foaming strip 20 arranged in the cavity 42, and the tire tread material 10 and the foaming strip 20 are extruded out of the compound machine after being compounded under the continuous pushing of the screw 61 of the rubber extruder to form more than two layers of the compound rubber pipes 59 which are compounded by different mixed rubber materials for two times and are in a special shape or a round hollow strip shape;

step five S5, manufacturing a blank of the composite type foamed rubber tire: the irregular hollow strip-shaped composite sizing material prepared in the step four S4 is cut to the correct length on a cutting device according to the requirement,

step S6, hot bonding:

placing the composite rubber tube cut in the step 4 into a hot-joining machine, heating, butting and closing the two ends of the rubber tube through hot-joining equipment after accurately positioning and clamping the two ends of the rubber tube to form an annular tubular composite tire blank, wherein a tread rubber 51 and a tire core rubber 52 are distributed on the composite tire blank from outside to inside in a structure, and a composite interface layer 53 is formed between the tread rubber 51 and the tire core rubber 52;

step seven S7, tire vulcanization molding: heating the inside of the pressing type tire mold to 155-175 ℃, setting the air pressure at 6-18 MPa,

and putting the prepared composite tire blank into a laminating type tire mold for integrated vulcanization, wherein the vulcanization time is controlled within 50 minutes.

In the process of integrated vulcanization: according to the production requirements of tires with different specifications, a tire crown, a tire body and a tire root are filled in the whole inner wall of a tire mold to form a fully-closed rubber tire;

in the process of integrated vulcanization: under the condition that the foaming strip is continuously heated, the foaming agent in the foaming strip begins to foam gradually and finally fills the inner cavity of the whole tire to form a solid or leave a few vacant sites, the foaming multiplying power of the foaming material with the main component of the regenerated rubber is stable and convenient to control during foaming, and the foaming strip is tightly attached to the tire fabric, so that the force applied to the tire fabric is more uniform in the foaming process, and the tire tread is fuller and has elasticity; the performance of the tire can be determined according to the foaming time of the foaming strips, when the foaming time of the foaming strips is longer, the inner cavity of the tire is in a solid state, the bearing capacity can be improved, when the foaming time of the foaming strips is shorter, a few vacant positions are reserved in the inner cavity of the tire, the bearing capacity is slightly reduced, and the elastic performance can be improved;

in the process of integrated vulcanization:

after the mold is closed, the tread rubber 51 forms tread patterns according to the lines of the mold, the tread rubber 51 starts to be vulcanized from the tread rubber 51 due to the fact that the temperature is gradually transmitted from the outside to the inside along the radial direction, when the heat temperature of the mold is transmitted to the composite interface layer 53, the two different mixed rubber materials of the tread rubber 51 and the tire core rubber start to be vulcanized with each other and generate a cross-linking reaction, a cross-linking layer 54 is formed, after 5-15 minutes, the air pressure in a tire blank cavity starts to be released to the normal pressure, the temperature is continuously transmitted to the tire core rubber inwards at the moment, the tire core rubber starts to be vulcanized and foamed at the temperature of 150-170 ℃ under the transmission of the mold temperature, a foaming agent in the tire core rubber starts to be decomposed and foamed, the tire core rubber forms a tire core foaming layer 56 under the wrapping of a three-dimensional reticular polymer, the manufacturing of the inflation-free tire is completed, and finally, the mold is.

By utilizing the common property of the rubber between the foaming strip in the step three S3 and the tire fabric in the step two S2, the rubber and the rubber can be crosslinked and fused together through the vulcanization effect of a vulcanizing agent at a certain temperature, the connection effect is improved, and therefore the integrated composite foaming inflation-free rubber tire is formed, the foaming strip and the tire tread material are combined more tightly, and separation and stripping are prevented.

Opening the mold: and after the step seven of integrated vulcanization, opening the mold and taking out the finished tire product.

In this embodiment, the foaming material in the first step S1 further includes a flame retardant, which has a flame retardant effect, improves safety performance, and is conveniently applied to the military field.

In this embodiment, the tread material in step two S2 further includes a fiber material and a flame retardant, the flame retardant is added to the tire fabric to improve the safety performance again, so as to prevent the tire fabric from being damaged by burning, and meanwhile, the strength of the tread can be improved and the bearing capacity can be improved by adding the fiber material.

Foaming strip and tread material are compounded together through the compounding machine and form multilayer (at least two-layer) compound sizing material, then vulcanize through subsequent integration and form the tire, and machining efficiency is high, makes foaming strip and tread material combine inseparabler more simultaneously and be difficult for droing, and the convenient control of foaming multiplying power makes the tire dynamic balance effect better, and the bearing capacity is higher, owing to adopt the foaming material of principal ingredients for reclaimed rubber, makes the economic cost of tire lower simultaneously, also environmental protection more simultaneously.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.