CN110815887A - Production method of tire curing bladder - Google Patents

Production method of tire curing bladder Download PDF

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Publication number
CN110815887A
CN110815887A CN201911141219.2A CN201911141219A CN110815887A CN 110815887 A CN110815887 A CN 110815887A CN 201911141219 A CN201911141219 A CN 201911141219A CN 110815887 A CN110815887 A CN 110815887A
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China
Prior art keywords
rubber
roller
internal mixer
curing bladder
tire curing
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Granted
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CN201911141219.2A
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Chinese (zh)
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CN110815887B (en
Inventor
赵会岩
赵海林
范屏
张学永
刘涛
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Wing Yi Rubber Co Ltd
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Wing Yi Rubber Co Ltd
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Priority to CN201911141219.2A priority Critical patent/CN110815887B/en
Publication of CN110815887A publication Critical patent/CN110815887A/en
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Publication of CN110815887B publication Critical patent/CN110815887B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/103—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with rollers or the like in casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
    • B29B7/186—Rotors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7495—Systems, i.e. flow charts or diagrams; Plants for mixing rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
    • C08L23/28—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with halogens or compounds containing halogen
    • C08L23/283—Halogenated homo- or copolymers of iso-olefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
    • B29D2030/0655—Constructional or chemical features of the flexible cores
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention discloses a production method of a tire curing bladder, and relates to the technical field of tire curing bladder production. The tire curing bladder rubber compound comprises the following components: butyl rubber, chlorinated butyl rubber, carbon black, brominated phenolic resin, sulfur, zinc oxide, stearic acid, an anti-aging agent and an accelerator; and (4) rubber mixing and vulcanization are carried out. The used internal mixer is provided with a rubber cutting device, a roller of the internal mixer is provided with an annular groove, two sides of a weight (203) at the bottom of an upper top bolt (2) are uniformly distributed with comb teeth (204) corresponding to the annular groove, and the width of the comb teeth (204) is smaller than that of the annular groove. Compared with the prior art, the invention has the beneficial effects that: the formula of the tire curing bladder is optimally designed, the structure of the internal mixer is improved, and small pieces of rubber are added into the internal mixer, so that various compounding agents can be dispersed in rubber materials, the rubber beans are crushed, the rubber is stirred, scorching can be avoided, and the rubber mixing efficiency is improved.

Description

Production method of tire curing bladder
Technical Field
The invention relates to the technical field of tire curing bladder production, in particular to a production method of a tire curing bladder.
Background
The tire vulcanization bladder is installed inside a tire vulcanizer to be used as an inner mold for shaping a tire 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 production process of the tire curing bladder mainly comprises rubber material formula design, optimization and improvement of a rubber mixing process and equipment thereof, and optimization and improvement of a curing forming process and equipment thereof. The rubber material used by the tire curing bladder is mainly butyl rubber, the butyl rubber has high saturation degree and excellent air tightness, but the tire curing bladder also has some problems, such as long mixing time with compounding ingredients, long mixing time in the mixing process for ensuring the uniformity of the rubber material, and high mixing temperature, which easily causes scorching of the rubber material and is not beneficial to the quality of the tire curing bladder produced subsequently.
Disclosure of Invention
The invention provides a production method of a tire curing bladder, which takes butyl rubber and chlorinated butyl rubber as main rubber materials of the tire curing bladder and carries out rubber mixing in an improved internal mixer to solve the technical problems.
The specific technical scheme is a production method of a tire curing bladder, and the rubber material comprises the following components: butyl rubber, chlorinated butyl rubber, carbon black, brominated phenolic resin, sulfur, zinc oxide, stearic acid, an anti-aging agent and an accelerator;
comprises the following production steps:
s1, weighing the materials according to the formula;
s2, adding butyl rubber and chlorinated butyl rubber into an internal mixer with a rubber cutting device at the internal mixing temperature of 90-110 ℃, adding carbon black, zinc oxide, stearic acid, an anti-aging agent and an accelerator after 30S-4min, and discharging the internal mixed rubber material after 2-8 min;
s3, adding the banburying rubber material in the S2 into an open mill, adding brominated phenolic resin and sulfur at the temperature of 100-120 ℃, and discharging the rubber sheet after 1-5 min;
s4, adding the rubber sheet obtained in the step S3 into injection vulcanization equipment, controlling the temperature of a screw to be 70-80 ℃, the injection pressure to be 14-16MPa and the vulcanization temperature to be 170-190 ℃, carrying out vulcanization, and after the vulcanization is finished, ejecting the tire vulcanization capsule out of a mold cavity by the injection vulcanization equipment to obtain the tire vulcanization capsule;
an internal mixer used in S2, comprising: an internal mixing chamber and a charging opening; the charging opening is positioned above the mixing chamber and communicated with the mixing chamber; a glue cutting device is arranged in the feeding port, and the glue cutting device cuts the large glue blocks into small glue blocks; in the banburying chamber, first annular grooves are formed in the first roller at intervals along the roller direction, second annular grooves are formed in the second roller at intervals along the roller direction, comb teeth corresponding to the first annular grooves and the second annular grooves are uniformly distributed on two sides of a weight fixedly installed at the bottom of the upper top bolt, the width of each comb tooth is smaller than the width of the first annular groove, and the width of each comb tooth is smaller than the width of the second annular groove.
Further, the rubber material comprises, by weight, 40-60 parts of butyl rubber, 40-60 parts of chlorinated butyl rubber, 10-30 parts of carbon black, 2-4 parts of brominated phenolic resin, 1-2 parts of sulfur, 2-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-3 parts of an anti-aging agent and 1-2 parts of an accelerator. The formula of the rubber material is suitable for tire curing capsules, and butyl rubber and chlorinated butyl rubber are taken as basic rubber materials and are reinforced by adding carbon black; zinc oxide and stearic acid are added to improve the processing performance; the anti-aging agent is added, so that the service life of the product can be prolonged; the brominated phenolic resin, the sulfur and the accelerator are used as compounding agents of a vulcanization system and are used for vulcanization and accelerating vulcanization.
Further, in the internal mixer used in S2, the rubber cutting device includes: the outer surface of the fourth roller is smooth, and an enveloping circle formed by the outer sides of the blades of the third roller is tangent to the outer surface of the fourth roller; the third roller is connected with a third motor through a driving wheel and a conveying belt. For the design of the specific structure of the rubber cutting device, in the device, the fourth roller provides a support for a rubber block to be cut, the fourth roller is passive by matching with the rubber cutting action of the blade, and can rotate under the rotation of the third roller and the extrusion action of rubber materials. The big rubber block can be cut into small rubber blocks with the volume smaller than the gap between two adjacent blades, and the small rubber blocks are added into the internal mixer, so that various compounding agents can be dispersed in rubber materials, and a good rubber mixing effect can be achieved within a short mixing time.
Further, the internal mixer used in S2 further includes: the internal mixer shell is hollow and is divided into an upper shell and a lower shell, and the upper shell and the lower shell are welded; the interior of the lower shell is an internal mixing chamber;
the upper part of the upper top bolt is provided with a cylinder, and the bottom of a telescopic rod of the cylinder is fixedly provided with a weight; the cylinder is arranged above the upper shell, and the telescopic rod and the weight are positioned in the upper shell;
the first roller is connected with a first motor through a driving wheel and a conveying belt; the second roller is connected with a second motor through a transmission wheel and a conveyor belt.
Further, the groove width of the first ring groove is denoted as W1, the groove width of the second ring groove is denoted as W2, the width of the comb teeth is denoted as W3, W1 is W2, and W3 is 0.9-0.99W 1. The width of the comb teeth is narrow, when rubber is started, residual rubber materials easily appear in the first ring groove or the second ring groove, and the residual rubber materials possibly cannot participate in effective mixing; when the width of the comb teeth is closer to the width of the first ring groove or the second ring groove, the accuracy and the installation requirement of the equipment are higher, and the cost of the equipment is increased. Preferably, design W3 ═ 0.95W 1.
Furthermore, the weight is integrated, the upper end of the weight is a quadrangular prism, the lower end of the weight is a triangular prism, one side surface of the triangular prism is completely coincided with one surface of the quadrangular prism, and the side edges of the triangular prism, which are parallel to the coincided side surfaces, form the bottom tip of the weight. The tip of the bottom of the weight can extend between the first roller and the second roller to play a role in beating and compacting the sizing material.
Furthermore, the comb teeth are positioned at the upper end of the weight and are downward, and the angle formed between the comb teeth and the side surface of the quadrangular prism is 20-70 degrees. The comb teeth are inclined at different angles, so that the positions in contact with the first roller and the second roller can be changed, namely the positions for rubber generation can be different. In addition, the size of the weight may limit the angle at which the comb teeth are tilted.
Further, the internal mixer used in S2 further includes: the upper end of the lower top bolt is fixedly provided with a top block, the top block is integrated, the upper end of the lower top bolt is a triangular prism, the lower end of the lower top bolt is a quadrangular prism, one side surface of the triangular prism is completely coincided with one surface of the quadrangular prism, and the side edges of the triangular prism, which are parallel to the coincided side surfaces, form the top tip of the top block; the lower top bolt is arranged at the bottom of the lower shell, and the top weight is positioned inside the lower shell.
Further, the internal mixer used in S2 is mounted on a base, the base including: pillar, bottom suspension fagging, last backup pad, curb plate, the bottom suspension fagging is being supported to the pillar, and the curb plate stands on between last backup pad and the bottom suspension fagging. The upper supporting plate and the lower supporting plate are mainly used for supporting parts such as power equipment, electric control equipment and the like of the internal mixer.
Furthermore, a reinforcing rib is arranged between the upper supporting plate and the side plate. By the design, the base is stable in structure, and the bearing capacity of the upper supporting plate is improved.
In the invention, the air cylinder in the upper top bolt is connected with an air control system, and the air cylinder can drive the weight to move up and down to beat the sizing material; a heating and cooling inlet and outlet pipeline is arranged at a roller of the mixing chamber part and used for controlling the internal temperature of the mixing chamber; an electric control system and an operation panel are arranged on the internal mixer. This is common knowledge in the application of the device and will not be described in detail in the present invention.
The main improvement points of the internal mixer in the invention are as follows: the rubber cutting device cuts the large rubber into small rubber, the small rubber is added into the internal mixer, and therefore dispersion of various compounding agents in rubber materials is facilitated, and rubber mixing efficiency is improved. The roller of the internal mixer is provided with the ring groove, the ring groove can play a role in crushing the rubber beans, the agglomerated carbon black or other ingredient aggregates, and the rubber beans are extremely easy to crush under the extrusion action when meeting the wall edge of the ring groove; the two sides of the weight at the bottom of the upper ram are uniformly distributed with comb teeth corresponding to the ring grooves, the comb teeth are used for rubber lifting and turning, the original state of the rubber material in the banburying chamber is directly and greatly changed, the opportunities of contact and mutual mixing of the rubber materials at different positions are increased, and the purpose of uniformly mixing the rubber material is rapidly realized.
Compared with the prior art, the invention has the advantages that,
1) the formula of the tire curing bladder is optimally designed by the combination of the butyl rubber and the chlorinated butyl rubber and the adjustment of the components;
2) the structure of the internal mixer is improved, the rubber cutting device is arranged at the feeding port, and small rubber blocks are added into the internal mixer, so that various compounding agents can be dispersed in rubber materials, and the rubber mixing efficiency is improved;
3) set up the annular on the roller, set up the broach on the weight, broken glue beans, play to glue and turn over and smelt, can reach good gluey effect in short banburying time, shorten gluey time, avoid the scorching phenomenon.
Drawings
FIG. 1 is a schematic view of the internal mixer for mixing rubber compounds used in the production of tire curing bladders according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a state view of the first roller and the upper ram;
fig. 6 is a schematic structural view of the third roll.
1. An internal mixer shell, 2, an upper top bolt, 3, a first roller, 4, a second roller, 5, a lower top bolt, 6, a charging hole, 7 and a base,
101. an upper shell 102, a lower shell 103 and an internal mixing chamber;
201. the device comprises an air cylinder 202, a telescopic rod 203, a weight 204 and comb teeth;
301. a first ring groove 302, a first motor;
401. a second ring groove 402, a second motor;
501. jacking;
601. a third roller 602, a fourth roller 603, a blade 604 and a third motor;
701. pillar 702, lower supporting plate 703, upper supporting plate 704, reinforcing rib 705 and side plate.
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 production method of a tire curing bladder comprises the following steps of 40-60 parts of butyl rubber, 40-60 parts of chlorinated butyl rubber, 10-30 parts of carbon black, 2-4 parts of brominated phenolic resin, 1-2 parts of sulfur, 2-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-3 parts of an anti-aging agent and 1-2 parts of an accelerator in the rubber components in parts by weight. The formula of the rubber material is suitable for tire curing capsules, and butyl rubber and chlorinated butyl rubber are taken as basic rubber materials and are reinforced by adding carbon black; zinc oxide and stearic acid are added to improve the processing performance; the anti-aging agent is added, so that the service life of the product can be prolonged; the brominated phenolic resin, the sulfur and the accelerator are used as compounding agents of a vulcanization system and are used for vulcanization and accelerating vulcanization.
Comprises the following production steps:
s1, weighing the materials according to the formula;
s2, adding butyl rubber and chlorinated butyl rubber into an internal mixer with a rubber cutting device at the internal mixing temperature of 90-110 ℃, adding carbon black, zinc oxide, stearic acid, an anti-aging agent and an accelerator after 30S-4min, and discharging the internal mixed rubber material after 2-8 min;
s3, adding the banburying rubber material in the S2 into an open mill, adding brominated phenolic resin and sulfur at the temperature of 100-120 ℃, and discharging the rubber sheet after 1-5 min;
s4, adding the rubber sheet obtained in the step S3 into injection vulcanization equipment, controlling the temperature of a screw to be 70-80 ℃, the injection pressure to be 14-16MPa and the vulcanization temperature to be 170-190 ℃, carrying out vulcanization, and after the vulcanization is finished, ejecting the tire vulcanization capsule out of a mold cavity by the injection vulcanization equipment to obtain the tire vulcanization capsule;
referring to fig. 1 to 5, the internal mixer used in S2 includes: an internal mixing chamber 103 and a feeding port 6; the charging opening 6 is positioned above the mixing chamber 103 and is communicated with the mixing chamber 103; a glue cutting device is arranged in the feeding port 6, and the glue cutting device cuts the large glue blocks into small glue blocks; in the banburying chamber 103, first ring grooves 301 are formed in the first roller 3 at intervals along the roller direction, second ring grooves 401 are formed in the second roller 4 at intervals along the roller direction, comb teeth 204 corresponding to the first ring grooves 301 and the second ring grooves 401 are uniformly distributed on two sides of a weight 203 fixedly mounted at the bottom of the upper ram 2, the width of the comb teeth 204 is smaller than the groove width of the first ring grooves 301, and the width of the comb teeth 204 is smaller than the groove width of the second ring grooves 401.
In the internal mixer used in S2, the rubber cutting device includes: the outer surface of the fourth roller 602 is smooth, and an enveloping circle formed by the outer sides of the blades 603 of the third roller 601 is tangent to the outer surface of the fourth roller 602; the third roller 601 is connected with a third motor 604 through a driving wheel and a transmission belt. For the design of the concrete structure of the glue cutting device, in the device, the fourth roller 602 provides a support for the block to be cut, and in cooperation with the glue cutting action of the blade 603, the fourth roller 602 is passive and can rotate under the rotation of the third roller 601 and the extrusion action of the glue. The big rubber block can be cut into small rubber blocks with the volume smaller than the gap between two adjacent blades 603, and the small rubber blocks are added into the internal mixer, so that various compounding agents can be dispersed in the rubber material, and a good rubber mixing effect can be achieved within a short mixing time.
The internal mixer used in S2, further comprising: the internal mixer comprises an internal mixer shell 1, wherein the internal mixer shell 1 is hollow and is divided into an upper shell 101 and a lower shell 102, and the upper shell 101 and the lower shell 102 are welded; the interior of the lower shell 102 is an internal mixing chamber 103;
the upper part of the upper top bolt 2 is provided with a cylinder 201, and the bottom of a telescopic rod 202 of the cylinder 201 is fixedly provided with a weight 203; the cylinder 201 is installed above the upper shell 101, and the telescopic rod 202 and the weight 203 are located inside the upper shell 101;
the first roller 3 is connected with a first motor 302 through a driving wheel and a conveying belt; the second roller 4 is connected to a second motor 402 via a drive wheel and a conveyor belt.
The groove width of the first ring groove 301 is denoted as W1, the groove width of the second ring groove 401 is denoted as W2, the width of the comb teeth 204 is denoted as W3, W1 is W2, and W3 is 0.9-0.99W 1. The comb teeth 204 are narrow in width, when rubber is started, residual rubber is prone to being generated in the first ring groove 301 or the second ring groove 401, and the residual rubber possibly cannot participate in effective mixing; as the width of the comb 204 is closer to the width of the first ring groove 301 or the second ring groove 401, the accuracy and installation requirements of the apparatus are higher, which leads to an increase in the cost of the apparatus.
The weight 203 is integrated, the upper end of the weight is a quadrangular prism, the lower end of the weight is a triangular prism, one side surface of the triangular prism is completely coincided with one surface of the quadrangular prism, and the side edges of the triangular prism, which are parallel to the coincided side surfaces, form the bottom tip of the weight 203. The bottom tip of the weight 203 can extend between the first roller 3 and the second roller 4 to play a role in beating and compacting the sizing material.
The comb teeth 204 are positioned at the upper end of the weight 203 and are downward, and the angle formed between the comb teeth 204 and the side surface of the quadrangular prism is 20-70 degrees. The positions of the comb teeth 204 contacting the first roller 3 and the second roller 4 are changed by different inclination angles, that is, the positions of the gum are different. In addition, the size of the weight 203 may limit the angle at which the comb teeth 204 are tilted.
The internal mixer used in S2, further comprising: the top of the lower top bolt 5 is fixedly provided with a top roller 501, the top roller 501 is integrated, the upper end of the lower top bolt 5 is a triangular prism, the lower end of the lower top bolt is a quadrangular prism, one side surface of the triangular prism is completely coincided with one surface of the quadrangular prism, and the side edge of the triangular prism parallel to the coincided side surface forms the top tip of the top roller 501; the lower top bolt 5 is installed at the bottom of the lower shell 102, and the top weight 501 is located inside the lower shell 102.
The internal mixer used in S2 is mounted on a base 7, and the base 7 includes: the support comprises a support column 701, a lower support plate 702, an upper support plate 703 and a side plate 705, wherein the support column 701 supports the lower support plate 702, and the side plate 705 stands between the upper support plate 703 and the lower support plate 702. The upper support plate 703 and the lower support plate 702 are mainly used for supporting the power equipment, the electric control equipment and other parts of the internal mixer.
A reinforcing rib 704 is provided between the upper support plate 703 and the side plate 705. Due to the design, the base 7 is stable in structure, and the bearing capacity of the upper supporting plate 703 is improved.
In the invention, the air cylinder 201 in the upper top bolt 2 is connected with an air control system, and the air cylinder 201 can drive the weight 203 to move up and down to beat the rubber material; a heating and cooling inlet and outlet pipeline is arranged at a roller of the mixing chamber part and used for controlling the internal temperature of the mixing chamber; an electric control system and an operation panel are arranged on the internal mixer. This is common knowledge in the application of the device and will not be described in detail in the present invention.
The main improvement points of the internal mixer in the invention are as follows: the rubber cutting device cuts the large rubber into small rubber, the small rubber is added into the internal mixer, and therefore dispersion of various compounding agents in rubber materials is facilitated, and rubber mixing efficiency is improved. The roller of the internal mixer is provided with the ring groove, the ring groove can play a role in crushing the rubber beans, the agglomerated carbon black or other ingredient aggregates, and the rubber beans are extremely easy to crush under the extrusion action when meeting the wall edge of the ring groove; the two sides of the weight 203 at the bottom of the upper ram 2 are uniformly distributed with comb teeth 204 corresponding to the ring grooves, so that the function of gluing the rubber material to the roller is enhanced, the comb teeth 204 are used for rubber lifting and turning, the original state of the rubber material in the banburying chamber is directly and greatly changed, the opportunities of contact and mutual mixing of the rubber materials at different positions are increased, and the purpose of uniformly mixing the rubber material is rapidly realized.
Examples 1-3, the same formulation was used: 50 parts of butyl rubber, 50 parts of chlorinated butyl rubber, 25 parts of carbon black, 3 parts of brominated phenolic resin, 1.5 parts of sulfur, 3 parts of zinc oxide, 2 parts of stearic acid, 2 parts of an anti-aging agent and 2 parts of a promoter. Mixing rubber by adopting the steps S1-S3 in the invention, in S2, banburying temperature is 105 ℃, firstly adding butyl rubber and chlorinated butyl rubber, adding blocks, adding carbon black, zinc oxide, stearic acid, an anti-aging agent and an accelerator after 1min, and discharging banburying rubber after 5 min; in S3, adding brominated phenolic resin and sulfur at 100 ℃, and discharging the film after 3 min; vulcanizing the rubber sheet on a flat vulcanizing machine, wherein the thickness of the rubber sheet is 4mm, the vulcanization temperature is 180 ℃, the vulcanization time is 25min, and after the rubber sheet is placed for 24h, preparing a sample and testing the mechanical property; the test results are shown in Table 1.
Detection standards and equipment:
① Shore hardness, the detection standard GB/T531-2008, and the detection equipment adopts an LX-A hardness tester of Shanghai dangerous Peak film machinery factory.
② tensile property, the detection standard GB/T528-2009, the sample is dumbbell type, the test speed is 500mm/min, the test environment temperature is 23 +/-2 ℃, and the detection equipment adopts GT-TCS-2000 tensile testing machine of Taiwan high-speed rail science and technology Limited.
③ tear strength, the detection standard GB/T529-2008 adopts right-angle sample, the test speed is 500mm/min, the test environment temperature is 23 +/-2 ℃, and the detection equipment adopts GT-TCS-2000 tensile testing machine of Taiwan high-speed railway science and technology Limited.
Table 1 table of mechanical property test data of films produced in examples 1 to 3
Example 1 Example 2 Example 3
Tensile strength/MPa 15.6 15.6 15.7
300% elongation at break/MPa 5.6 5.7 5.8
Elongation at break/%) 424 413 418
Percent elongation set 28 27 27
Tear Strength/kN/m 44.9 44.8 45.1
Shore hardness 72 72 73
As can be seen from the table above, with the same formulation, different batches of rubber sheets produced by adopting the technical scheme of the invention can meet the conventional performance requirement when the rubber mixing time is about 10 min; the films of different batches are more stable in performances such as tensile strength, elongation at break, tearing strength and hardness; the rubber material is mixed uniformly, no obvious scorch occurs, and the performance is kept good.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims (10)

1. A production method of a tire curing bladder is characterized in that,
the sizing material comprises the following components: butyl rubber, chlorinated butyl rubber, carbon black, brominated phenolic resin, sulfur, zinc oxide, stearic acid, an anti-aging agent and an accelerator;
comprises the following production steps:
s1, weighing the materials according to the formula;
s2, adding butyl rubber and chlorinated butyl rubber into an internal mixer with a rubber cutting device at the internal mixing temperature of 90-110 ℃, adding carbon black, zinc oxide, stearic acid, an anti-aging agent and an accelerator after 30S-4min, and discharging the internal mixed rubber material after 2-8 min;
s3, adding the banburying rubber material in the S2 into an open mill, adding brominated phenolic resin and sulfur at the temperature of 100-120 ℃, and discharging the rubber sheet after 1-5 min;
s4, adding the rubber sheet obtained in the step S3 into injection vulcanization equipment, controlling the temperature of a screw to be 70-80 ℃, the injection pressure to be 14-16MPa and the vulcanization temperature to be 170-190 ℃, carrying out vulcanization, and after the vulcanization is finished, ejecting the tire vulcanization capsule out of a mold cavity by the injection vulcanization equipment to obtain the tire vulcanization capsule;
an internal mixer used in S2, comprising: an internal mixing chamber (103) and a feed inlet (6); the feeding port (6) is positioned above the banburying chamber (103) and is communicated with the banburying chamber (103); a glue cutting device is arranged in the feeding port (6), and the glue cutting device cuts the large glue blocks into small glue blocks; in the banburying chamber (103), first ring groove (301) have been opened along the roller direction interval on first roller (3), second ring groove (401) have been opened along the roller direction interval on second roller (4), the both sides evenly distributed of the weight (203) of fixed mounting in last ram (2) bottom respectively with first ring groove (301), the corresponding broach (204) of second ring groove (401), the width of broach (204) is less than the groove width of first ring groove (301), the width of broach (204) is less than the groove width of second ring groove (401).
2. The production method of the tire curing bladder according to claim 1, wherein the rubber component comprises 40-60 parts of butyl rubber, 40-60 parts of chlorinated butyl rubber, 10-30 parts of carbon black, 2-4 parts of brominated phenolic resin, 1-2 parts of sulfur, 2-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-3 parts of anti-aging agent and 1-2 parts of accelerator by weight.
3. The method for producing a tire curing bladder according to claim 1, wherein the internal mixer used in S2, the rubber cutting device comprises: the roller comprises a third roller (601) and a fourth roller (602), wherein a plurality of blades (603) are fixedly arranged on the third roller (601) in the circumferential direction, the outer surface of the fourth roller (602) is smooth, and an enveloping circle formed by the outer sides of the blades (603) of the third roller (601) is tangential to the outer surface of the fourth roller (602); the third roller (601) is connected with a third motor (604) through a driving wheel and a conveyor belt.
4. The method for producing a tire curing bladder according to claim 1, wherein the internal mixer used in S2 further comprises: the internal mixer comprises an internal mixer shell (1), wherein the internal mixer shell (1) is hollow and is divided into an upper shell (101) and a lower shell (102), and the upper shell (101) and the lower shell (102) are welded; the interior of the lower shell (102) is an internal mixing chamber (103);
the upper part of the upper top bolt (2) is provided with an air cylinder (201), and the bottom of a telescopic rod (202) of the air cylinder (201) is fixedly provided with a weight (203); the cylinder (201) is arranged above the upper shell (101), and the telescopic rod (202) and the weight (203) are positioned inside the upper shell (101);
the first roller (3) is connected with a first motor (302) through a driving wheel and a conveying belt; the second roller (4) is connected with a second motor (402) through a driving wheel and a conveying belt.
5. The method for producing a tire curing bladder according to claim 1, wherein the width of the first ring groove (301) is denoted as W1, the width of the second ring groove (401) is denoted as W2, the width of the comb teeth (204) is denoted as W3, W1 is W2, and W3 is 0.9-0.99W 1.
6. A method for producing a tyre curing bladder according to claim 1, wherein the weight (203) is one-piece, the upper end is a quadrangular prism and the lower end is a triangular prism, one side of the triangular prism completely coincides with one face of the quadrangular prism, and the side edges of the triangular prism parallel to the coinciding side faces constitute the bottom tip of the weight (203).
7. The method for producing a tire curing bladder according to claim 6, wherein the comb teeth (204) are located at the upper end of the weight (203) and are directed downward, and the angle formed between the comb teeth (204) and the side surface of the quadrangular prism is 20-70 °.
8. A production method of a tire curing bladder according to claim 1,
the internal mixer used in S2, further comprising: the upper end of the lower top bolt (5) is fixedly provided with a top stone roller (501), the top stone roller (501) is integrated, the upper end of the lower top bolt is a triangular prism, the lower end of the lower top bolt is a quadrangular prism, one side surface of the triangular prism is completely coincided with one surface of the quadrangular prism, and the side edge of the triangular prism, which is parallel to the coincided side surface, forms the top tip of the top stone roller (501);
the lower top bolt (5) is installed at the bottom of the lower shell (102), and the top weight (501) is located inside the lower shell (102).
9. A production method of a tire curing bladder according to claim 1, wherein the internal mixer used in S2 is mounted on a base (7), and the base (7) comprises: the support comprises a support column (701), a lower support plate (702), an upper support plate (703) and a side plate (705), wherein the lower support plate (702) is supported by the support column (701), and the side plate (705) stands between the upper support plate (703) and the lower support plate (702).
10. A method of producing a tyre curing bladder according to claim 9 wherein reinforcing ribs (704) are provided between the upper support plate (703) and the side plate (705).
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CN114181472A (en) * 2021-12-27 2022-03-15 湖北华强科技股份有限公司 Self-film-forming butyl rubber plug
CN114953547A (en) * 2022-05-20 2022-08-30 广西科学院 Method for vulcanizing tire by utilizing microwave heating bladder

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CN114953547A (en) * 2022-05-20 2022-08-30 广西科学院 Method for vulcanizing tire by utilizing microwave heating bladder

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