A rubber tire and a production process thereof

Abstract

The application discloses a rubber tire and a production process thereof, and relates to the tire production process field.The rubber tire comprises the following quality components: 5-15 parts of butyronitrile rubber, 55-65 parts of standard rubber SCR WF, 25-35 parts of butadiene styrene rubber, 5-15 parts of high styrene rubber HS-860, 15-25 parts of calcium carbonate, 5-15 parts of magnesium carbonate, 25-35 parts of carbon black, 5-10 parts of pottery clay, 0.5 part of accelerator, 1.5-4 parts of sulfur, and 0.5 part of antioxidant.The high styrene rubber HS-860 has excellent mechanical properties;calcium carbonate, magnesium carbonate and pottery clay are compounded, and the hardness, reinforcing effect and insulation performance of the rubber are significantly enhanced;the rubber tire;in the vulcanization stage, the heating time in the tire vulcanization process is greatly reduced, the productivity and yield are improved, and the equipment utilization rate is also improved;after the vulcanization stage starts, no heat is supplemented, so that the tire does not enter the over-vulcanization stage, the tire scorching phenomenon caused by over-vulcanization is effectively prevented, and the tire quality is obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tire production process, and particularly relates to a rubber tire and a production process thereof. BACKGROUND

[0002] Tire is a round annular elastic rubber product for ground rolling mounted on various vehicles or machines. It is usually mounted on a metal rim to support the vehicle body, buffer external impact, realize contact with the road surface and ensure the driving performance of the vehicle. The tire is often used under complex and harsh conditions, and it bears various deformations, loads, forces and high and low temperatures during driving, so it must have high load bearing performance, traction performance and cushioning performance. At the same time, it is also required to have high wear resistance and flex resistance, as well as low rolling resistance and heat generation. Half of the world's rubber consumption is used for tire production, which shows the ability of rubber consumption in tire production. In the tire production technology, vulcanization is a key device.

[0003] For example, the patent with the publication number CN115109356A discloses a high-temperature-resistant peroxide vulcanized fluororubber and a preparation method thereof. The rubber is made of the following raw materials in mass parts: fluororubber green rubber 100 parts, reinforcing agent 20-30 parts, acid absorber 3 parts, initiator 1-3 parts, crosslinking agent 1-10 parts, and multifunctional additive 0.1-2 parts.

[0004] The above-mentioned application improves the mixing process and vulcanization process, increases the easy mixing degree of other additives, prevents the contamination of the mold during the vulcanization process of the rubber compound, increases the vulcanization degree of the additive during the vulcanization stage, increases the performance stability in the case of thermal oxidation aging during use, and has a significant effect with a small amount of addition, a simple formula and no toxicity and environmental protection. However, the vulcanization temperature is high, and the vulcanization time is as long as 12 hours.

[0005] Therefore, it is necessary to improve such a method to overcome the above-mentioned defects. SUMMARY

[0006] The present application aims to provide a rubber tire and a production process thereof to solve the problems raised in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] A rubber tire comprises the following mass components: nitrile rubber 5-15 parts, standard rubber SCR WF 55-65 parts, styrene-butadiene rubber 25-35 parts, high styrene rubber HS-860 5-15 parts, calcium carbonate 15-25 parts, magnesium carbonate 5-15 parts, carbon black 25-35 parts, clay 5-10 parts, accelerator 0.5 parts, sulfur 1.5-4 parts, and antioxidant 0.5 parts.

[0009] A rubber tire production process, comprising the following steps:

[0010] S1, batching: nitrile rubber, standard rubber SCR WF, styrene-butadiene rubber, high styrene rubber HS-860 are mixed in a certain proportion and put into a pulverizer;

[0011] S2, mixing: the rubber and the weighed powders are manually fed into the mixer in a certain order, and the mixing is carried out for 30 minutes under the condition that the temperature does not exceed 130℃; during the mixing process, the temperature of the rubber changes continuously due to friction, and at the beginning of the mixing, the temperature is only about 50-60℃, and as the components are added, the temperature rises continuously, and when the rubber is hot, the temperature can reach 120-130℃;

[0012] S3, opening: the method of mechanical stress of the opening mill is used to change the rubber from a strong and tough elastic state to a soft state, reduce the molecular weight and viscosity of the raw rubber to improve its plasticity, and obtain appropriate fluidity, so as to meet the needs of subsequent processing;

[0013] S4, preforming: the rubber after opening is produced into a rubber blank of the required shape by a calender, and the size and thickness are uniform;

[0014] S5, vulcanization: the rubber is placed in a mold and heated in a vulcanizing machine to form a sheet, and the temperature does not exceed 150℃ (generally in the range of 120-150℃); the rubber is pressed into a sheet by a flat vulcanizing machine, and the rubber is heated and formed in the mold, so that the macromolecules of the rubber change from linear structure to network structure, thereby improving the physical and mechanical properties and other properties of the rubber;

[0015] S6, trimming and assembly: the tire after vulcanization is manually cleaned of corners, and is assembled with a plastic hub to form a tire, and finally is wound into a warehouse.

[0016] Further, in the step S2:

[0017] S2.1, the nitrile rubber, standard rubber SCR WF, styrene-butadiene rubber, high styrene rubber HS-860 are mixed for 0.5-5 minutes; then 30-45% calcium carbonate, magnesium carbonate, carbon black and clay are mixed for 0.5-5 minutes, and then accelerators and antioxidants are mixed for 0.5-5 minutes;

[0018] S2.2, 20-40% calcium carbonate, magnesium carbonate, carbon black and clay are mixed for 0.5-2 minutes;

[0019] S2.3, the remaining calcium carbonate, magnesium carbonate, carbon black, clay, accelerators and antioxidants are mixed, the rubber is discharged, cooled, filtered, and a piece of material is obtained, wherein the rubber is discharged after the mixing temperature reaches 125℃;

[0020] S2.4, placing a piece of material for more than 8 hours, mixing, mixing with sulfur when the temperature reaches 60℃, cooling and collecting pieces when the temperature reaches 90℃.

[0021] Further, in the step S5, the rubber vulcanization includes three stages:

[0022] S5.1, burning stage (vulcanization induction period): control the heating temperature in the vulcanizing machine to be 138-180℃, heat for 1-3 minutes, the heating temperature is 15-25% higher than the temperature used in the general conventional vulcanization process, and the pressure reaches 0.16-0.2Mpa;

[0023] S5.2, hot vulcanization stage (pre-vulcanization stage): the vulcanizing machine is not heated, and the pressure is maintained. At this time, the tire absorbs heat in this stage, so the temperature will drop. When the temperature drops by 10℃ below the set temperature, heating is started. When the temperature exceeds the set temperature by 10℃, heating is stopped, and the pressure is continued to be maintained. The temperature is repeatedly and intermittently heated to 180-220℃ to circulate in the capsule for 2-6 minutes, and the pre-vulcanization is completed. The set temperature value is 15-25% lower than the heating temperature, which is 90-127℃.

[0024] S5.3, flat vulcanization stage (vulcanization stage): stop heating, maintain pressure for 7-45 minutes, temperature drop 20%-35%, to 60-100℃.

[0025] Further, the step S4 includes a subsequent material receiving device connected to the calender, which receives the subsequent rubber blank. The subsequent material receiving device of the calender includes a frame and a material receiving structure. The frame is generally rectangular. The top of the frame is provided with a workbench. The top of the workbench is provided with a material receiving structure. The material receiving structure is provided with a machine shell for protection. The material receiving structure includes an upper support group and a lower support group symmetrically arranged above and below. The upper support group and the lower support group are both two rectangular plates symmetrically arranged front and back, and the rectangular plates in the same group are fixedly connected by connecting rods. The left and right ends of the upper support group are respectively rotatably connected with an upper driven roller and an upper driving roller. An upper conveying belt is arranged between the upper driven roller and the upper driving roller. The left and right ends of the lower support group are respectively rotatably connected with a lower driven roller and a lower driving roller. A lower conveying belt is arranged between the lower driven roller and the lower driving roller.

[0026] Further, the upper driven roller, the upper driving roller, the lower driven roller and the lower driving roller are rotatably connected with the corresponding rectangular plates through shafts, and the two ends of the shafts are rotatably connected with the rectangular plates through bearings.

[0027] Further, the distance between the upper support group and the lower support group can be adjusted to adapt to different specifications of the extruded rubber blank, and the distance between the upper support group and the lower support group is adjusted by a height adjusting device, wherein the height adjusting device comprises two guide shafts, the bottom of the guide shaft is fixedly installed on the top of the workbench and located at the rear side of the upper support group and the lower support group; the rear side of the upper support group and the lower support group is fixedly installed with a bearing seat, a linear bearing is arranged in the bearing seat, and the linear bearing is slidably sleeved on the guide shaft;

[0028] Further, the top of the guide shaft is also fixedly installed with a top plate, a screw rod is rotatably arranged between the top plate and the workbench, and the top of the screw rod is also fixedly installed with a hand wheel; two groups of threaded segments are arranged on the screw rod, which are an upper threaded segment and a lower threaded segment, the rotation directions of the upper threaded segment and the lower threaded segment are opposite, and the rear side of the upper support group and the lower support group is also fixedly installed with an upper transmission nut and a lower transmission nut, respectively, and the upper transmission nut and the lower transmission nut are correspondingly arranged with the upper threaded segment and the lower threaded segment.

[0029] Further, the top plate is located at the top of the machine shell, so that the hand wheel is located outside the machine shell.

[0030] Further, the calender subsequent material receiving device further comprises a driving device, wherein the driving device comprises a driving motor and a speed reducer, the driving motor is drivingly connected with the speed reducer, and the driving motor and the speed reducer are fixedly installed on a motor mounting plate, the motor mounting plate is fixedly installed on the rack, and a worm is fixedly installed on the output shaft of the speed reducer, wherein the worm penetrates through the workbench, and the worm gears on the rotating shafts of the upper driving roller and the lower driving roller are engaged with the worm; meanwhile, the rear ends of the rotating shafts of the upper driving roller and the lower driving roller penetrate through the rectangular plate and are fixedly installed with worm gears at the rear ends.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. The present application uses high styrene rubber HS-860, which has high styrene content and excellent mechanical properties; the present application uses a combination of calcium carbonate, magnesium carbonate and clay, which significantly enhances the hardening, reinforcing effect and insulation performance of the rubber;

[0033] 2. The vulcanization stage in the present application significantly reduces the heating time in the tire vulcanization process, improves the production rate and yield, and also improves the equipment utilization rate; since there is no heat supplement after the start of the vulcanization stage, the tire will not enter the over-vulcanization stage, effectively preventing the tire from being over-vulcanized and causing scorching, and the tire quality is significantly improved,

[0034] Three, through the worm and the worm drive, so that the motor is a large weight component, can not be installed in the upper support group and the lower support group, improve the stability of the upper support group and the lower support group, while the upper support group and the lower support group will be displaced up and down, and the worm wheel is not far from the worm in the horizontal direction, the worm wheel is in the height position of the worm, and the transmission effect of the worm wheel and the worm will not be affected.

[0035] Four, when the application is put into use, the opened rubber is produced into the required shape of the rubber blank through the calender, and the material is sequentially discharged through the material receiving structure, the workers can sequentially receive the material at the position of the discharge port of the calender, and the temperature of the rubber blank is reduced through the material receiving structure, so that the workers will not be scalded. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a process schematic diagram of a rubber tire and a production process thereof.

[0037] Figure 2 It is a structural schematic diagram of the subsequent material receiving device of the calender.

[0038] Figure 3 It is a front view of the subsequent material receiving device of the calender.

[0039] Figure 4 It is a side view of the subsequent material receiving device of the calender.

[0040] Figure 5 It is a structural schematic diagram of the material receiving structure in the subsequent material receiving device of the calender.

[0041] Figure 6 It is a structural schematic diagram of the height adjusting device in the subsequent material receiving device of the calender. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0043] A rubber tire comprises nitrile rubber, standard rubber SCR WF, styrene butadiene rubber, high styrene rubber HS-860, calcium carbonate, magnesium carbonate, carbon black, clay, accelerator, antioxidant, sulfur;

[0044] Example 1, a rubber tire comprising a mass of the following components: nitrile rubber 5 parts, standard rubber SCRWF 55 parts, styrene butadiene rubber 25 parts, high styrene rubber HS-860 5 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0045] Example 2, a rubber tire comprising a mass of the following components: nitrile rubber 10 parts, standard rubber SCRWF 60 parts, styrene butadiene rubber 30 parts, high styrene rubber HS-860 10 parts, calcium carbonate 20 parts, magnesium carbonate 10 parts, carbon black 30 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0046] Example 3, a rubber tire comprising a mass of the following components: nitrile rubber 15 parts, standard rubber SCRWF 65 parts, styrene butadiene rubber 35 parts, high styrene rubber HS-860 15 parts, calcium carbonate 125 parts, magnesium carbonate 15 parts, carbon black 235 parts, clay 10 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0047] Example 4, a rubber tire comprising a mass of the following components: nitrile rubber 5 parts, standard rubber SCRWF 55 parts, styrene butadiene rubber 35 parts, high styrene rubber HS-860 15 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0048] Example 5, a rubber tire comprising a mass of the following components: nitrile rubber 15 parts, standard rubber SCRWF 65 parts, styrene butadiene rubber 25 parts, high styrene rubber HS-860 5 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0049] Example 6, a rubber tire comprising a mass of the following components: nitrile rubber 10 parts, standard rubber SCRWF 60 parts, styrene butadiene rubber 20 parts, high styrene rubber HS-860 5 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0050] Comparative Example 1, a rubber tire comprising a mass of the following components: nitrile rubber 10 parts, standard rubber SCRWF 65 parts, styrene butadiene rubber 20 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, clay 5 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0051] Comparative Example 2, a rubber tire, comprising a material of the following mass components: nitrile rubber 10 parts, standard rubber SCR WF 60 parts, styrene butadiene rubber 20 parts, high styrene rubber HS-860 5 parts, calcium carbonate 15 parts, magnesium carbonate 5 parts, carbon black 25 parts, accelerator 0.5 parts, sulfur 4 parts, antioxidant 0.5 parts.

[0052] As shown in Figure 1 a rubber tire production process, comprising the following steps:

[0053] S1, batching: nitrile rubber, standard rubber SCR WF, styrene butadiene rubber, high styrene rubber HS-860 are mixed in a certain proportion and put into a pulverizer.

[0054] S2, mixing: the rubber and the weighed various powders are manually fed into the mixing machine in a certain order, and the mixing is carried out for 30 min under the condition that the temperature does not exceed 130 DEG C. During the mixing process, the temperature of the glue changes continuously due to friction. At the beginning of mixing, it is only about 50-60 DEG C. With the addition of each component, the temperature rises continuously. When the glue is hot, it can reach 120-130 DEG C.

[0055] Specifically, in the above step S2:

[0056] S2.1, the nitrile rubber, standard rubber SCR WF, styrene butadiene rubber, high styrene rubber HS-860 are mixed for 0.5-5 min; then 30-45% of calcium carbonate, magnesium carbonate, carbon black and clay are mixed for 0.5-5 min, and then the accelerator and the antioxidant are mixed for 0.5-5 min;

[0057] S2.2, 20-40% of calcium carbonate, magnesium carbonate, carbon black and clay are added and mixed for 0.5-2 min;

[0058] S2.3, the remaining calcium carbonate, magnesium carbonate, carbon black, clay, accelerator and antioxidant are mixed, the glue is discharged, cooled, filtered, and the piece is collected, wherein the glue is discharged after the temperature of the mixing reaches 125 DEG C;

[0059] S2.4, the first stage material is placed for more than 8 hours, mixed, and when the temperature reaches 60 DEG C, the sulfur is mixed, the glue is discharged, and the piece is collected after the temperature reaches 90 DEG C.

[0060] The present application adopts high styrene rubber HS-860, which has high ethylene content and excellent mechanical properties; the present application adopts the combination of calcium carbonate, magnesium carbonate and clay, which significantly enhances the hardening, reinforcing effect and insulation performance of the rubber;

[0061] S3, opening: the method of mechanical stress of the opening mill is used to change the rubber from the tough elastic state to the soft state, reduce the molecular weight and viscosity of the raw rubber to improve its plasticity, and obtain appropriate fluidity, so as to meet the needs of subsequent processing.

[0062] S4, preforming: the rubber after opening is produced into the rubber blank of the required shape by the calender, and the size and thickness are uniform.

[0063] S5, vulcanization: the rubber is put into the mold and heated in the vulcanizing machine to form a sheet, and the flat vulcanizing machine is pressed at a temperature not exceeding 150 DEG C (generally in the range of 120-150 DEG C), and the rubber is heated and formed in the mold, so that the macromolecules of the rubber are changed from linear structure to network structure, so that the physical and mechanical properties and other properties of the rubber are obviously improved. The process produces waste gas such as non-methane total hydrocarbon and carbon disulfide. The vulcanizing machine is surrounded by soft curtain, and the waste gas is collected and treated by catalytic oxidation + activated carbon adsorption, and then discharged through a 15m high exhaust pipe (3#).

[0064] It is well known that vulcanization refers to the chemical change process of linear macromolecules of rubber into three-dimensional network structure by chemical crosslinking, and after flowing, the rubber changes from plastic mixing rubber to high elasticity or hard crosslinked rubber;

[0065] In industry, from the perspective of vulcanization process control, the vulcanization curve can be divided into four stages: burning stage, hot vulcanization stage, flat vulcanization stage and over-vulcanization stage; The burning stage corresponds to the induction period of the vulcanization reaction, the hot vulcanization stage corresponds to the crosslinking reaction stage of the vulcanization reaction, the flat vulcanization stage corresponds to the early stage of network formation in the vulcanization reaction, at this time the crosslinking reaction has been basically completed, and then the rearrangement and cracking of crosslinking bonds and other reactions occur; The over-vulcanization stage corresponds to the late stage of network formation in the vulcanization reaction, and there are rearrangement of crosslinking bonds, thermal cracking reaction of crosslinking bonds and chain segments.

[0066] Specifically, in the step S5, the rubber vulcanization includes three stages:

[0067] S5.1, burning stage (vulcanization induction period): control the heating temperature in the vulcanizing machine to be 138-180 DEG C, heat for 1-3 minutes, the heating temperature is 15-25% higher than the temperature used in general conventional vulcanization process, and the pressure reaches 0.16-0.2 Mpa;

[0068] S5.2, hot vulcanization stage (pre-vulcanization stage): the vulcanizing machine is not heated and pressure is maintained. At this time, the tire absorbs heat in this stage, so the temperature will decrease. When the temperature decreases by 10°C below the set temperature, heating is turned on. When the temperature exceeds the set temperature by 10°C, heating is stopped. The pressure is continued to be maintained, and 180-220°C heating is intermittently supplied to make it circulate in the capsule for 2-6 minutes, and the pre-vulcanization is completed. The set temperature value is 15-25% lower than the heating temperature, which is 90-127°C;

[0069] S5.3, flat vulcanization stage (positive vulcanization stage): stop heating and maintain pressure for 7-45 minutes. The temperature decreases by 20%-35% to 60-100°C.

[0070] The vulcanization stage in the present scheme greatly reduces the heating time in the tire vulcanization process, improves the production rate and yield, and also improves the equipment utilization rate. Since there is no heat supplement after the start of the positive vulcanization stage, the tire will not enter the over-vulcanization stage, effectively preventing the tire from burning caused by over-vulcanization, and the tire quality is significantly improved,

[0071] S6, trimming and assembly: the vulcanized tire is manually cleaned of corners and assembled with a plastic hub to form a final roll for storage.

[0072] The equipment used in the rubber tire production process includes a pulverizer, a cooling tower, a mixer, a calender, a vulcanizing machine, a rotorless vulcanizer, and a rubber strength testing machine for detection.

[0073] At the same time, a subsequent material receiving device is connected to the calender in step S4 to receive the subsequent rubber blank, as shown in the accompanying drawings. Figures 2-6 The calender subsequent material receiving device includes a frame 1 and a material receiving structure 2.

[0074] The frame 1 is generally rectangular. The top of the frame 1 is provided with a workbench 101. The top of the workbench 101 is provided with the material receiving structure 2. The material receiving structure 2 is provided with a machine shell 3 on the periphery. The machine shell 3 is open at both ends. The machine shell is used for the protection of the material receiving structure 2.

[0075] The material receiving structure 2 includes an upper support group 201 and a lower support group 202 symmetrically arranged above and below. The upper support group 201 and the lower support group 202 are both two rectangular plates symmetrically arranged front and back, and the rectangular plates in the same group are fixedly connected by connecting rods 203.

[0076] The left and right ends of the upper support group 201 are respectively rotatably connected with an upper driven roller 204 and an upper driving roller 205. An upper conveying belt 206 is arranged between the upper driven roller 204 and the upper driving roller 205.

[0077] The left and right ends of the lower support group 202 are respectively rotationally connected with a lower driven roller 207 and a lower driving roller 208. The lower driven roller 207 and the lower driving roller 208 are provided with a lower conveying belt 209 therebetween;

[0078] It is worth noting that in the present scheme, the upper driven roller 204, the upper driving roller 205, the lower driven roller 207 and the lower driving roller 208 are all rotationally connected with the respective rectangular plates through the rotating shafts 210, wherein the two ends of the rotating shafts 210 are rotationally connected with the rectangular plates through bearings;

[0079] Meanwhile, the rear ends of the rotating shafts 210 on the upper driving roller 205 and the lower driving roller 208 all pass through the rectangular plates and are fixedly installed with worm gears 211 at the end portions of the rear ends;

[0080] In the present scheme, the distance between the upper support group 201 and the lower support group 202 can be adjusted to adapt to different specifications of the extruded rubber blanks, and the distance between the upper support group 201 and the lower support group 202 is adjusted by the height adjusting device 4, wherein the height adjusting device 4 comprises two guide shafts 401, the bottom of the guide shaft 401 is fixedly installed on the top of the workbench 101 and located at the rear side of the upper support group 201 and the lower support group 202; the rear side of the upper support group 201 and the lower support group 202 are both fixedly installed with bearing seats 402, and the bearing seats 402 are provided with linear bearings, and the linear bearings are slidingly sleeved on the guide shafts 401;

[0081] The top of the guide shaft 401 is also fixedly installed with a top plate 403, and the screw rod 404 is rotationally arranged between the top plate 403 and the workbench 101, and the top of the screw rod 404 is also fixedly installed with a hand wheel 405; the screw rod 404 is provided with two groups of screw threads, namely an upper screw thread 406 and a lower screw thread 407, the rotation directions of the upper screw thread 406 and the lower screw thread 407 are opposite, and the rear side of the upper support group 201 and the lower support group 202 is also respectively fixedly installed with an upper transmission nut 408 and a lower transmission nut 409, and the upper transmission nut 408 and the lower transmission nut 409 are respectively arranged corresponding to the upper screw thread 406 and the lower screw thread 407;

[0082] By rotating the hand wheel to drive the screw rod 404 to rotate, since the rotation directions of the upper screw thread 406 and the lower screw thread 407 are opposite, the upper support group 201 and the lower support group 202 can be driven to move away from or close to each other.

[0083] Further, the top plate 403 is located at the top of the cabinet 3; so that the hand wheel 3 is located outside the cabinet 3; facilitating the workers to operate.

[0084] In the scheme, there is also a driving device 5, wherein the driving device 5 comprises a driving motor 501 and a speed reducer 502, the driving motor 501 is drivingly connected with the speed reducer 502, the driving motor 501 and the speed reducer 502 are both fixedly installed on a motor mounting plate 503, the motor mounting plate 503 is fixedly installed on the rack 1, the output shaft of the speed reducer 502 is fixedly installed with a worm 504, the worm 504 penetrates through the workbench 101, and the worm gears 211 on the rotating shafts 210 of the upper driving roller 205 and the lower driving roller 208 are respectively engaged with the worm 504.

[0085] Through the worm gear and the worm transmission, the large-weight component motor 501 can be not installed on the upper bracket group 201 and the lower bracket group 202, the stability of the upper bracket group 201 and the lower bracket group 202 is improved, and since the upper bracket group 201 and the lower bracket group 202 are displaced up and down, the worm gear is not far away from the worm in the horizontal direction, the height position of the worm gear on the worm does not affect the transmission effect of the worm gear and the worm.

[0086] When the scheme is put into use, the rubber after the opening mixing is produced into the rubber blank with the required shape through the calender, is sequentially discharged through the material receiving structure 2, workers can sequentially receive the material at the position of the discharge port of the calender, and the temperature of the rubber blank is reduced after passing through the material receiving structure 2, so that the workers will not be scalded.

[0087] The test results are shown in Table 1.

[0088] Table 1: Performance test results of examples

[0089]

[0090] In the description of the application, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the application, it should be noted that unless otherwise expressly specified and limited, the terms "provided", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. A rubber tire characterized in that, A substance comprising the following quality components: nitrile rubber 5-15 parts, standard rubber SCR WF 55-65 parts, styrene butadiene rubber 25-35 parts, high styrene rubber HS-860 5-15 parts, calcium carbonate 15-25 parts, magnesium carbonate 5-15 parts, carbon black 25-35 parts, clay 5-10 parts, accelerator 0.5 parts, sulfur 1.5-4 parts, antioxidant 0.5 parts.

2. A process for the production of a rubber tyre as claimed in claim 1, characterised in that, Comprising the following steps: S1, batching: nitrile rubber, standard rubber SCR WF, styrene butadiene rubber, high styrene rubber HS-860 are mixed in a certain proportion and put into a crusher; S2, mixing: the rubber and various powders are manually fed into the mixing machine in a certain order, and the mixing is carried out for 30 minutes under the condition that the temperature does not exceed 130℃; due to friction during mixing, the temperature of the glue changes constantly, and at the beginning of mixing, it is only 50-60℃, and with the addition of each component, the temperature rises constantly, and when the glue is hot, it can reach 120-130℃; S3, opening: the method of mechanical stress of the opening mill is used to change the rubber from strong and tough elastic state to soft, reduce the molecular weight and viscosity of the raw rubber to improve its plasticity, and obtain appropriate fluidity, so as to meet the needs of subsequent processing; S4, preforming: the rubber after opening is produced into the required shape of rubber blank by calender, and the size and thickness are uniform; S5, vulcanization: the rubber is placed in the mold and heated in the vulcanizing machine to form a sheet, and the rubber is heated and formed in the mold to change the linear structure of the rubber macromolecule into a network structure, so that the physical and mechanical properties and other properties of the rubber are obviously improved; S6, trimming and assembly: the vulcanized tire is manually cleaned of corners, and assembled with a plastic hub to form a tire, and finally wound into a warehouse.

3. Process for the production of rubber tyres according to claim 2, characterized in that, In the step S2: S2.1, nitrile rubber, standard rubber SCR WF, styrene butadiene rubber, high styrene rubber HS-860 are mixed for 0.5-5 minutes; then 30-45% of calcium carbonate, magnesium carbonate, carbon black and clay are mixed for 0.5-5 minutes, and then accelerator and antioxidant are mixed for 0.5-5 minutes; S2.2, add 20-40% of calcium carbonate, magnesium carbonate, carbon black and clay and mix for 0.5-2 minutes; S2.3, add the remaining calcium carbonate, magnesium carbonate, carbon black, clay, accelerator and antioxidant and mix, discharge, cool, filter and collect the sheet to obtain a first-stage material, wherein the discharging is performed after the temperature of the mixing reaches 125℃; S2.4, the first-stage material is placed for more than 8 hours, mixed, and when the temperature reaches 60℃, sulfur is added and mixed, discharged, cooled and collected when the temperature reaches 90℃.

4. Process for the production of rubber tyres according to claim 2, characterised in that, In the step S5: the rubber vulcanization includes three stages: S5.1, burning stage (vulcanization induction period): control the heating temperature in the vulcanizing machine to be 138-180℃, heat for 1-3 minutes, the heating temperature is 15-25% higher than the temperature used in general conventional vulcanization process, and the pressure reaches 0.16-0.2Mpa; S5.2, hot vulcanization stage (pre-vulcanization stage): the vulcanizing machine is not heated and pressure is maintained. At this time, the tire absorbs heat in this stage, so the temperature will decrease. When the temperature decreases by 10℃ below the set temperature, heating is turned on. When the temperature exceeds the set temperature by 10℃, heating is stopped. The pressure is continued to be maintained, and 180-220℃ heating is intermittently supplied to make it circulate in the capsule for 2-6 minutes. The pre-vulcanization is completed. The set temperature value is 15-25% lower than the heating temperature, which is 90-127℃; S5.3, flat vulcanization stage (vulcanization stage): stop heating and maintain pressure for 7-45 minutes. The temperature decreases by 20%-35% to 60-100℃.

5. Process for the production of rubber tyres according to claim 2, characterised in that, The subsequent material receiving device of the calender in the step S4 receives the subsequent rubber blank outfeed. The subsequent material receiving device of the calender includes a rack and a material receiving structure. The rack is in the shape of a rectangle as a whole. The top of the rack is provided with a workbench. The top of the workbench is provided with the material receiving structure. The periphery of the material receiving structure is provided with a machine shell for the protection of the material receiving structure. The material receiving structure includes an upper support group and a lower support group symmetrically arranged upward and downward. The upper support group and the lower support group are both two rectangular plates symmetrically arranged front and back. The rectangular plates in the same group are fixedly connected through connecting rods. The left and right ends of the upper support group are respectively rotatably connected with an upper driven roller and an upper driving roller. An upper conveying belt is arranged between the upper driven roller and the upper driving roller. The left and right ends of the lower support group are respectively rotatably connected with a lower driven roller and a lower driving roller. A lower conveying belt is arranged between the lower driven roller and the lower driving roller.

6. Process for the production of rubber tyres according to claim 5, characterized in that, The upper driven roller, the upper driving roller, the lower driven roller and the lower driving roller are all rotatably connected with the corresponding rectangular plates through shafts. The two ends of the shafts are rotatably connected with the rectangular plates through bearings.

7. Process for the production of rubber tyres according to claim 5, characterized in that, The distance between the upper support group and the lower support group can be adjusted to adapt to different specifications of the extruded rubber blank. The distance between the upper support group and the lower support group is adjusted through a height adjusting device. The height adjusting device includes two guide shafts. The bottom of the guide shafts is fixedly installed on the top of the workbench and located at the rear side of the upper support group and the lower support group. The rear side of the upper support group and the lower support group is fixedly installed with a bearing seat. A linear bearing is arranged in the bearing seat. The linear bearing is slidably sleeved on the guide shaft. The top of the guide shaft is also fixedly installed with a top plate. A screw rod is rotatably arranged between the top plate and the workbench. The top of the screw rod is also fixedly installed with a hand wheel. Two groups of screw threads are arranged on the screw rod, which are an upper screw thread and a lower screw thread. The rotation directions of the upper screw thread and the lower screw thread are opposite. The rear side of the upper support group and the lower support group is also fixedly installed with an upper transmission nut and a lower transmission nut respectively. The upper transmission nut and the lower transmission nut are correspondingly arranged with the upper screw thread and the lower screw thread.

8. Process for the production of rubber tyres according to claim 7, characterized in that, The top plate is located at the top of the machine shell. The hand wheel is located outside the machine shell.

9. Process for the production of rubber tyres according to claim 5, characterized in that, The post-calender material receiving device further comprises a driving device, wherein the driving device comprises a driving motor and a speed reducer, the driving motor is drivingly connected to the speed reducer, the driving motor and the speed reducer are both fixedly installed on a motor mounting plate, the motor mounting plate is fixedly installed on the frame, a worm is fixedly installed on an output shaft of the speed reducer, the worm passes through the workbench, and the worm gears on the rotating shafts of the upper driving roller and the lower driving roller are respectively engaged with the worm. Meanwhile, the rear ends of the rotating shafts of the upper driving roller and the lower driving roller both pass through the rectangular plate and are fixedly installed with worm gears at the rear ends.

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