阅读说明：本技术 一种轮胎硫化胶囊胶料的制备方法 (Preparation method of tire curing bladder rubber material ) 是由 赵会岩 韩正奇 赵海林 范屏 张学永 刘涛 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种轮胎硫化胶囊胶料的制备方法,涉及轮胎硫化胶囊制备技术领域。该轮胎硫化胶囊组分中,生胶是丁基橡胶；补强填充剂包括：炭黑、乙炔炭黑、石墨和三氧化二铝；活性剂是氯丁橡胶；加工助剂包括：硬脂酸、石蜡；硫化剂包括硫化树脂和硫磺；进行至少两次密炼-滤胶后,进入开炼机混炼及压片。与现有技术相比,本发明中的有益效果：对部分生胶进行塑炼,增大可塑性；生胶分段加入,补强填充剂分段加入,并分别进行滤胶操作,密炼机和滤胶机合理布置,使“密炼-滤胶”形成一个循环工艺,在密炼中间过程,进行滤胶,在初期将成团的、未分散的配合剂、炭黑进行强迫分散,有效提高混炼效果、缩短时间、提高生产效率。(The invention discloses a preparation method of a tire curing bladder rubber material, and relates to the technical field of tire curing bladder preparation. In the tire curing bladder component, the raw rubber is butyl rubber; the reinforcing filler comprises: carbon black, acetylene black, graphite, and aluminum oxide; the active agent is neoprene; the processing aid comprises: stearic acid, paraffin wax; the vulcanizing agent comprises a vulcanizing resin and sulfur; carrying out banburying-rubber filtering for at least two times, and then entering an open mill for mixing and tabletting. Compared with the prior art, the invention has the beneficial effects that: plasticating part of the raw rubber to increase the plasticity; the raw rubber is added in sections, the reinforcing filler is added in sections, rubber filtering operation is respectively carried out, the internal mixer and the rubber filter are reasonably arranged, so that 'internal mixing-rubber filtering' forms a circulation process, rubber filtering is carried out in the middle of internal mixing, agglomerated and undispersed compounding agent and carbon black are forcedly dispersed in the initial stage, the mixing effect is effectively improved, the time is shortened, and the production efficiency is improved.)

1. A preparation method of a tire curing bladder rubber compound comprises the following components: raw rubber, reinforcing filler, activator, processing aid and vulcanizing agent, which is characterized in that,

in the tire curing bladder component, the raw rubber is butyl rubber; the reinforcing filler comprises: carbon black, acetylene black, graphite, and aluminum oxide; the active agent is neoprene; the processing aid comprises: stearic acid, paraffin wax; the vulcanizing agent comprises a vulcanizing resin and sulfur;

the preparation method comprises the following steps:

s1, adding materials into an internal mixer (2) through an upper auxiliary machine (1), firstly adding 1/2 crude rubber, then adding an active agent, a processing aid and a 1/2 reinforcing filler, then adding the rest 1/2 crude rubber, controlling a first rotor (203) and a second rotor (204) in the internal mixer (2) to synchronously rotate, carrying out internal mixing for 2-4min at the temperature of 100-110 ℃ in the internal mixer (2), and discharging rubber materials at the temperature of 100-110 ℃;

the rubber materials discharged from S2 and S1 enter a rubber filter (3) for rubber filtering, and the rubber materials discharged from the rubber filtering are added into the internal mixer (2) again;

s3, when the rubber material in the S2 is added into the internal mixer (2) again, the rest 1/2 reinforcing filler is added into the internal mixer (2) through the upper auxiliary machine (1), the first rotor (203) and the second rotor (204) in the internal mixer (2) are controlled to synchronously rotate, the temperature in the internal mixer (2) is 135-145 ℃, the internal mixing is carried out for 1-2min, the rubber material is discharged, and the rubber discharging temperature is 140-150 ℃;

the rubber discharged from S4, S3 or S41 enters a rubber filter (3) for rubber filtering, and S41 or S42 is carried out;

s41, adding the rubber material discharged by rubber filtering into an internal mixer (2) for internal mixing for 1-2min, then discharging the rubber material, and carrying out S4;

s42, adding the rubber material discharged by rubber filtering into the open mill (4), controlling the temperature of the open mill (4) to be 80-90 ℃, adding a vulcanizing agent, mixing for 2-5min, and conveying the rubber material in the open mill (4) to a tablet press (5) to press out rubber sheets for later use;

a tire curing bladder rubber material preparation system used in the preparation method of the tire curing bladder rubber material comprises the following components:

the upper auxiliary machine (1) is used for weighing materials and assisting in feeding, and the upper auxiliary machine (1) is positioned above the internal mixer (2);

the internal mixer (2) is used for mixing raw rubber, a reinforcing filler, an active agent and a processing aid, a feeding hopper (208) of the internal mixer (2) is connected with an outlet of the upper auxiliary machine (1), and an outlet of the internal mixer (2) is connected with an inlet of the rubber filter (3);

the rubber filter (3) enables the rubber beans and the agglomerated filling agent in the rubber material to be crushed and dispersed; the outlet of the rubber filter (3) is respectively connected with the charging hopper (208) of the internal mixer (2) and the inlet of the open mill (4);

the open mill (4) further mixes the rubber material;

the tablet press (5) presses the irregular sizing material into a sheet shape, and the inlet of the tablet press (5) is connected with the outlet of the open mill (4);

the upper auxiliary machine (1), the internal mixer (2), the rubber filter (3), the open mill (4) and the tablet press (5) are respectively connected with a controller (6).

2. The method for preparing a tire curing bladder compound according to claim 1, wherein the rubber comprises 100 parts of raw rubber, 30-60 parts of reinforcing filler, 6-8 parts of active agent, 3-5 parts of processing aid and 2-6 parts of vulcanizing agent.

3. The method for preparing the tire curing bladder compound according to claim 2, wherein the ratio of the carbon black, the acetylene black, the graphite and the aluminum oxide in the reinforcing filler is (1-2): (2-4): (1-2):1.

4. The method of claim 2, wherein the ratio of stearic acid to paraffin in the processing aid is 1: (1-2).

5. The method of claim 2, wherein the ratio of the curing resin to the sulfur in the curing agent is (1-3): 1.

6. the method for preparing the tire curing bladder rubber compound according to claim 1, wherein the internal mixer (2) in the tire curing bladder rubber compound preparation system is provided with an external mixer shell (201) on the outer side, an internal mixing chamber (202) on the inner side, a first rotor (203) and a second rotor (204) on the inner side of the internal mixing chamber (202), an upper top bolt (205) is arranged above the internal mixing chamber (202), a hollow cavity is arranged in the middle of the upper top bolt (205), and an upper top bolt control rod (206) with the bottom part rigidly connected with a lower pressing hammer (207) is arranged inside the upper top bolt control rod; one side of the middle part of the upper top bolt (205) is provided with a charging hopper (208) with an upward opening, the bottom of the internal mixing chamber (202) is provided with a discharge valve (209), a discharge door (210) is arranged on the external shell (201) of the internal mixer, and the discharge door (210) is positioned at one side close to the rubber filter (3);

gear pump (301) is the front end of rubber filter (3), gear pump (301) inside have intermeshing's first gear (302) and second gear (303), one side that gear pump (301) is close to banbury mixer (2) is equipped with revolving door (304), one side of keeping away from banbury mixer (2) is equipped with bin outlet (305), discharge conduit (306) is being connected in bin outlet (305), filter screen (307) are being installed to the internally mounted of discharge conduit (306), material receiving box (308) is placed to the end of discharge conduit (306), lifting machine (309) that have lift hopper (310), material receiving box (308) is placed in to one end, the other end extends to banbury mixer (2) hopper (208) department.

7. A method of preparing a tyre curing bladder compound according to claim 6, characterized in that the first rotor (203) and the second rotor (204) in the internal mixer (2) are synchronous rotors.

Technical Field

The invention relates to the technical field of tire curing bladder preparation, in particular to a preparation method of a tire curing bladder rubber material.

Background

The tire vulcanization capsule is a hollow thin-wall rubber product, and is installed inside a tire vulcanizer to be used as an inner mold for tire shaping in the tire vulcanization molding process. Media such as superheated water or compressed air are filled into the tire curing bladder, so that the tire curing bladder stretches to support the tire rubber blank, the tire rubber blank is attached to the tire inner liner, the temperature is kept relatively balanced in the tire curing process by utilizing the flowing heat transfer characteristic of the media fluid in the tire curing bladder, the effect of uniform tire curing is achieved, and the balance performance of the tire is improved.

Tire curing bladders are important to the production of tires. The tire curing bladder is repeatedly used under the conditions of high temperature and high pressure for many times, and is required to have excellent performances such as air tightness, strength, aging resistance and the like. The rubber material used for preparing the tire curing bladder has direct influence on the quality of the tire curing bladder; as a sizing material used for hollow thin-wall rubber products, the uniform mixing plays a key role in improving the mechanical property of the hollow thin-wall rubber products, and the occurrence of weak points can be avoided. However, in the mixing process of the rubber material, the phenomena of ingredient agglomeration and carbon black agglomeration are often accompanied, so that the occurrence of rubber beans is caused, and the rubber material is not uniform; the mixing time is prolonged, the uniformity of the rubber compound can be improved to a certain extent, but the production efficiency is reduced.

CN104441539B discloses a production process of a rubber sheet for a tire curing bladder, wherein a rubber system of the rubber sheet is butyl rubber, a reinforcing filler is carbon black, and the rubber sheet is prepared by banburying, open mixing and extrusion; wherein the banburying and open mixing steps refer to patent CN102786745B, (1) 98-102 parts of butyl rubber, 4.96-5.04 parts of zinc oxide, 0.9996-1.0004 parts of stearic acid, 7.35-7.65 parts of vulcanized resin, 44.1-45.9 parts of N220 carbon black, 29.4-30.6 parts of N550 carbon black, 4.96-5.04 parts of castor oil and 0.735-0.765 part of stabilizer are poured into a banbury mixer for banburying, the banburying time is 15-20 minutes, and the banburying temperature is 110-130 ℃ to obtain a banburying rubber material; (2) putting the banburying rubber material into an open mill for mixing at the mixing temperature of 80-90 ℃ for 15-25 minutes, and discharging by the open mill to obtain a rubber sheet with the thickness of 10mm and the width of 50 mm; the film is naturally cooled to room temperature. In the banburying and open mixing processes, no measures are taken for the agglomeration of compounding agents, the agglomeration of carbon black and the occurrence of rubber beans, which is not beneficial to the improvement of the uniformity of rubber materials; the total time of banburying and open milling is longer, and the production efficiency is low.

Disclosure of Invention

The invention provides a preparation method of a tire curing bladder rubber material, wherein a rubber filtering process is added in the banburying process, so that the agglomeration of compounding agents and carbon black is avoided, the uniform dispersion of the compounding agents and the carbon black in raw rubber is facilitated, and the technical problem is solved.

The specific technical scheme is a preparation method of a tire curing bladder rubber material, and the tire curing bladder comprises the following components: raw rubber, reinforcing filler, activator, processing aid and vulcanizing agent; in the tire curing bladder component, the raw rubber is butyl rubber; the reinforcing filler comprises: carbon black, acetylene black, graphite, and aluminum oxide; the active agent is neoprene; the processing aid comprises: stearic acid, paraffin wax; the vulcanizing agent comprises a vulcanizing resin and sulfur;

the preparation method comprises the following steps:

s1, adding materials into an internal mixer through an upper auxiliary machine, firstly adding 1/2 crude rubber, then adding an active agent, a processing aid and a 1/2 reinforcing filler, then adding the rest 1/2 crude rubber, controlling a first rotor and a second rotor in the internal mixer to synchronously rotate, carrying out internal mixing at the temperature of 100-110 ℃ in the internal mixer for 2-4min, and discharging rubber materials at the temperature of 100-110 ℃;

the rubber materials discharged from S2 and S1 enter a rubber filter for rubber filtering, and the rubber materials discharged from the rubber filtering are added into the internal mixer again;

s3, when the rubber material in the S2 is added into the internal mixer again, the rest 1/2 reinforcing filler is added into the internal mixer through the upper auxiliary machine, the first rotor and the second rotor in the internal mixer are controlled to synchronously rotate, the temperature in the internal mixer is 135-;

the rubber discharged from S4, S3 or S41 enters a rubber filter for rubber filtering, and S41 or S42 is carried out;

s41, adding the rubber material discharged by rubber filtering into an internal mixer for internal mixing for 1-2min, and then discharging the rubber, and carrying out S4;

s42, adding the rubber material discharged by rubber filtering into an open mill, controlling the temperature of the open mill to be 80-90 ℃, adding a vulcanizing agent, mixing for 2-5min, and conveying the rubber material in the open mill into a tablet press to press out rubber sheets for later use;

a tire curing bladder rubber material preparation system used in the preparation method of the tire curing bladder rubber material comprises the following components: the upper auxiliary machine is used for weighing materials and assisting in feeding, and is positioned above the internal mixer; the internal mixer is used for mixing raw rubber, a reinforcing filler, an active agent and a processing aid, a charging hopper of the internal mixer is connected with an outlet of an upper auxiliary machine, and the outlet of the internal mixer is connected with an inlet of a rubber filter; the rubber filter crushes and disperses the rubber beans and the agglomerated filler in the rubber material; the outlet of the rubber filter is respectively connected with the charging hopper of the internal mixer and the inlet of the open mill; further mixing the rubber material by an open mill; the irregular sizing material is pressed into a sheet shape by a tablet press, and the inlet of the tablet press is connected with the outlet of the open mill; the upper auxiliary machine, the internal mixer, the rubber filter, the open mill and the tablet press are respectively connected with the controller. The upper auxiliary machine, the internal mixer, the rubber filter, the open mill, the tablet press and the controller are connected with electric power equipment in use, which is common knowledge in equipment application and is not described in detail in the invention.

Further, 100 parts of raw rubber, 30-60 parts of reinforcing filler, 6-8 parts of activator, 3-5 parts of processing aid and 2-6 parts of vulcanizing agent.

Furthermore, in the reinforcing filler, the proportion of carbon black, acetylene black, graphite and aluminum oxide is (1-2): (2-4): (1-2):1.

Further, in the processing aid, the ratio of stearic acid to paraffin is 1: (1-2).

Further, in the vulcanizing agent, the ratio of the vulcanized resin to the sulfur is (1-3): 1.

further, the internal mixer in the tire curing bladder rubber material preparation system is provided with an external mixer shell on the outer side, an internal mixing chamber inside, a first rotor and a second rotor inside the internal mixing chamber, an upper ram above the internal mixing chamber, a hollow cavity in the middle of the upper ram, and an upper ram control rod with a bottom part rigidly connected with a lower press hammer inside; a charging hopper with an upward opening is arranged on one side of the middle part of the upper top bolt, a discharge valve is arranged at the bottom of the internal mixer chamber, a discharge door is arranged on the shell of the internal mixer, and the discharge door is positioned on one side close to the rubber filter;

the front end of rubber filter is the gear pump, and gear pump inside has intermeshing's first gear and second gear, and one side that the gear pump is close to the banbury mixer is equipped with the revolving door, is equipped with the bin outlet in the one side of keeping away from the banbury mixer, and the bin outlet is connecting the discharge tube way, and the internally mounted of discharge tube way is filtering the net, places the material receiving box at the end of discharge tube way, has the lifting machine of elevator bucket, and in the material receiving box was arranged in to one end, the other end extended to the loading hopper department of banbury mixer.

Furthermore, a first rotor and a second rotor in the internal mixer are synchronous rotors, so that uniform temperature rise is facilitated.

In the invention, the staged feeding is carried out in the banburying stage, in S1, 1/2 raw rubber is plasticated firstly, the space of a banburying chamber is limited, and the operability is large because the addition is half; plastication increases the plasticity of the butyl rubber, is beneficial to the subsequent mixing of an active agent, a processing aid and 1/2 reinforcing filler, improves the compatibility with the residual 1/2 raw rubber added later, can form a whole body quickly, and can well keep the long-chain property of the latter half raw rubber. And (S2) filtering the rubber, forcedly dispersing the agglomerated and undispersed compounding agent and carbon black, and carrying out primary heat dissipation and chain segment relaxation in the rubber filter under the conditions of high temperature, shearing action and stress in the rubber material in the banburying process. And returning the mixture to the internal mixer after rubber filtration, adding the remaining 1/2 reinforcing filler, and carrying out internal mixing-rubber filtration to ensure that the reinforcing filler added later is uniformly dispersed in the rubber material. The control of temperature parameters in the rubber mixing process is closely related to the formula and the process steps; the preparation method of the invention can realize uniform mixing of the rubber material in a short time.

In the mixing, raw rubber and various compounding agents are mixed together by a rubber device according to the proportion of the compounding agents specified by a rubber compound formula, and the various compounding agents are uniformly dispersed in the raw rubber. The purpose of mixing the rubber material is to obtain the rubber material performance index which is uniform and consistent in physical and mechanical performance index and meets the prescription regulation, so that the following process operation is facilitated and the quality requirement of a finished product is ensured.

Whether the banburying-rubber filtering operation needs to be carried out or not after the reinforcing filler is completely added, or the banburying-rubber filtering operation needs to be carried out for several times is related to the grade of the initial raw materials, and if the compounding agent or the reinforcing filler particles are uniform and have proper particle size, the compounding agent or the reinforcing filler particles can be directly fed into S42 from S4; if the compounding agent or reinforcing filler has a large amount of coarse particles, is liable to agglomerate and gel, the "banburying-straining" operation is carried out 1 to 5 times in addition. For the detection of the mixing effect, the macro determination can be carried out on the processed film by carrying out the relevant mechanical property detection.

Compared with the prior art, the invention has the advantages that,

1) plasticating part of the raw rubber to increase the plasticity of the butyl rubber and facilitate the subsequent mixing of an active agent, a processing aid and a reinforcing filler;

2) the raw rubber is added in sections, so that the raw rubber is easy to be compatible and the long-chain property of the raw rubber is easy to maintain; the reinforcing filler is added in sections and is subjected to rubber filtering operation respectively, so that the mixing efficiency can be improved, and the uniformity of the mixing is improved;

3) the internal mixer and the rubber filter are reasonably arranged, so that an internal mixing-rubber filtering process is formed, rubber filtering is performed in the middle of internal mixing, agglomerated and undispersed compounding agent and carbon black are forcedly dispersed in the initial stage, the mixing effect is effectively improved, the time is shortened, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a tire curing bladder compound production system of a method of producing a tire curing bladder compound in accordance with the present invention;

FIG. 2 is a schematic diagram of the internal mixer and the rubber filter in the tire curing bladder rubber compound preparation system of the present invention;

FIG. 3 is a schematic structural view of another state of the internal mixer and the rubber filter in the tire curing bladder compound manufacturing system of the present invention.

1. An upper auxiliary machine, 2, an internal mixer, 3, a rubber filter, 4, an open mill, 5, a tablet press, 6 and a controller;

201. an internal mixer outer shell 202, an internal mixing chamber 203, a first rotor 204, a second rotor 205, an upper ram 206, an upper ram control rod 207, a lower ram 208, a charging hopper 209, a discharge valve 210 and a discharge door;

301. gear pump 302, first gear 303, second gear 304, revolving door 305, discharge port 306, discharge pipeline 307, filter screen 308, material receiving box 309, elevator 310, elevator bucket.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications, proportions, changes, and variations of the structures, and dimensions which are within the scope of the present disclosure are not to be considered as limiting the present disclosure.

In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

A preparation method of a tire curing bladder rubber material comprises the following components of 100 parts of butyl rubber, 6-13 parts of carbon black, 12-27 parts of acetylene carbon black, 6-13 parts of graphite, 3-12 parts of aluminum oxide, 1-2.5 parts of stearic acid, 1.5-3.4 parts of paraffin, 1-4.5 parts of vulcanized resin, 0.5-3 parts of sulfur and 6-8 parts of chloroprene rubber.

The preparation method comprises the following steps:

s1, adding materials into an internal mixer 2 through an upper auxiliary machine 1, firstly adding 1/2 crude rubber, then adding an active agent, a processing aid and a 1/2 reinforcing filler, then adding the rest 1/2 crude rubber, controlling a first rotor 203 and a second rotor 204 in the internal mixer 2 to synchronously rotate, carrying out internal mixing for 2-4min at the temperature of 100-110 ℃ in the internal mixer 2, and discharging rubber materials at the temperature of 100-110 ℃;

the rubber materials discharged from S2 and S1 enter a rubber filter 3 for rubber filtering, and the rubber materials discharged from the rubber filtering are added into the internal mixer 2 again;

s3, when the rubber material in the S2 is added into the internal mixer 2 again, the rest 1/2 reinforcing filler is added into the internal mixer 2 through the upper auxiliary machine 1, the first rotor 203 and the second rotor 204 in the internal mixer 2 are controlled to synchronously rotate, the temperature in the internal mixer 2 is 135-;

the rubber discharged from S4, S3 or S41 enters a rubber filter 3 for rubber filtering, and S41 or S42 is carried out;

s41, adding the rubber material discharged by rubber filtering into an internal mixer 2 for internal mixing for 1-2min, then discharging the rubber, and carrying out S4;

s42, adding the rubber material discharged by rubber filtering into the open mill 4, controlling the temperature of the open mill 4 to be 80-90 ℃, adding a vulcanizing agent, mixing for 2-5min, and conveying the rubber material in the open mill 4 into the tablet press 5 to press out rubber sheets for later use.

A tire curing bladder rubber material preparation system used in the preparation method of the tire curing bladder rubber material comprises the following components: the upper auxiliary machine 1 is used for weighing materials and assisting in feeding, and the upper auxiliary machine 1 is positioned above the internal mixer 2; the internal mixer 2 is used for mixing raw rubber, a reinforcing filler, an active agent and a processing aid, a feeding hopper 208 of the internal mixer 2 is connected with an outlet of the upper auxiliary machine 1, and an outlet of the internal mixer 2 is connected with an inlet of the rubber filter 3; the rubber filter 3 crushes and disperses the rubber beans and the agglomerated filling agent in the rubber material; the outlet of the rubber filter 3 is respectively connected with the feed hopper 208 of the internal mixer 2 and the inlet of the open mill 4; the open mill 4 further mixes the rubber material; the tablet press 5 presses the irregular sizing material into a sheet shape, and the inlet of the tablet press 5 is connected with the outlet of the open mill 4; the upper auxiliary machine 1, the internal mixer 2, the rubber filter 3, the open mill 4 and the tablet press 5 are respectively connected with a controller 6. The upper auxiliary machine 1, the internal mixer 2, the rubber filter 3, the open mill 4, the tablet press 5 and the controller 6 are connected with an electric power device in use, which is common knowledge in device application and will not be described in detail in the invention.

Further, the internal mixer 2 in the tire curing bladder rubber material preparation system is provided with an external mixer shell 201 at the outer side, an internal mixing chamber 202 at the inner side, a first rotor 203 and a second rotor 204 at the inner side of the internal mixing chamber 202, an upper top bolt 205 above the internal mixing chamber 202, a hollow cavity in the middle of the upper top bolt 205, and an upper top bolt control rod 206 with the bottom rigidly connected with a lower pressing hammer 207 at the inner part; a charging hopper 208 with an upward opening is arranged at one side of the middle part of the upper top bolt 205, a discharge valve 209 is arranged at the bottom of the internal mixing chamber 202, a discharge door 210 is arranged on the external shell 201 of the internal mixer, and the discharge door 210 is positioned at one side close to the rubber filter 3;

the front end of the rubber filter 3 is a gear pump 301, a first gear 302 and a second gear 303 which are meshed with each other are arranged in the gear pump 301, a rotary door 304 is arranged on one side of the gear pump 301 close to the internal mixer 2, a discharge opening 305 is arranged on one side far away from the internal mixer 2, the discharge opening 305 is connected with a discharge pipeline 306, a filter screen 307 is arranged in the discharge pipeline 306, a material receiving box 308 is arranged at the tail end of the discharge pipeline 306, a lifting machine 309 with a lifting bucket 310 is arranged, one end of the lifting machine is arranged in the material receiving box 308, and the other end of the lifting machine extends to the position of a loading bucket 208 of the internal. The first rotor 203 and the second rotor 204 in the internal mixer 2 are synchronous rotors.