CN102107466A - Production method for mixing rubber material at low temperature - Google Patents
Production method for mixing rubber material at low temperature Download PDFInfo
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- CN102107466A CN102107466A CN2009102565509A CN200910256550A CN102107466A CN 102107466 A CN102107466 A CN 102107466A CN 2009102565509 A CN2009102565509 A CN 2009102565509A CN 200910256550 A CN200910256550 A CN 200910256550A CN 102107466 A CN102107466 A CN 102107466A
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Abstract
A production method for mixing rubber material at a low temperature adopts a novel rubber mixing method improved on the basis of a low-temperature mixing principle so as to realize the high-quality and high-efficiency novel technology of mixed rubber production. An internal mixer is utilized and low-temperature mixing and low-temperature material discharge are taken as the objective function, a plurality of full automatic open mills are configured at the lower part of the internal mixer, supplementation mixing is carried out under low-temperature conditions so as to achieve automatic curing temperature, and the low-temperature mixing is ensured during the integral rubber material manufacturing process, and the purpose of high-quality and high-efficiency mixed rubber production can be achieved. The rubber material is put in the internal mixer so as to be mixed, the rubber material is discharged to an open mill number 1 after reaching the temperature reuquired by the technology and then rubber smashing and temperature reduction are carried out, then rubber material is conveyed to one of the open mills in an open mill set through a conveying device and the supplementation mixing is carried out, and the rubber material that is processed through the supplementation mixing is conveyed to an open mill number 8 and the piece unloading process can be carried out.
Description
Technical field
The present invention is a kind of mixing production method of low temperature that improves the elastomeric compound quality, belongs to the rubber tyre production field.
Background technology
Along with constantly bringing forth new ideas of rubber tyre manufacturing technology, adopt high efficiency, high-quality compounding process can improve tire production quality and safety in utilization effectively at multiple sizing compound formula.
The sizing material compounding process mainly is conceived to following 2 aspects at present, and the one, on the basis that guarantees rubber physical mechanical property, how to improve the whole uniformity of auxiliary agent dispersiveness and sizing material; The 2nd, how to enhance productivity and reduce labour cost.By improve raw material, rubber mixing technique and rubber preparing device promote melting efficiency and quality accomplish implemented at large.Improve automaticity, the minimizing amount of labour and the manual intervention of the mixing production of sizing material simultaneously, also can further improve sizing material stability and cut down finished cost.
The compounding process that existing home and abroad tyre production enterprise is taked is mainly mixing based on multisection type, rubber mixing technique of this method (shown in the accompanying drawing 1 of back) and configuration device mainly are, the rubber master batch sizing material carries out multisection type in the subsidiary engine on banbury mixing, and banbury is discharge under 150-165 ℃ of situation.1 screw extruder of subsidiary engine configuration or 1 to 2 mill replenish mixingly under the banbury, and each section mixing cycle needs lasting about 1.5 to 3.5 minutes because of the difference of rotor speed.
The multisection type compounding process of this quasi-tradition, its shortcoming is that sizing material is mixing under higher temperature conditions, be easy to reduce the quality of elastomeric compound, particularly the finished composition uniformity is relatively poor, thereby directly causes the investment of lower, the whole banburying equipment of efficient that the rubber tyre sizing material produces higher.
Formerly apply for a patent and for example, application number 200610171068.1, the title parallel auxiliaries type technique of one step for refining rubber, its scheme is only to adopt a banbury, sizing material is through the process mixing and the compressing tablet cooling that once heats up.Following subsidiary engine is equipped with at least 4 mills, except first mill connects glue cooling and last mill slice, remaining mill is that relation in parallel is as adding the mixing usefulness of sulphur, sizing material is delivered on the batch off unit by last mill compressing tablet and is cooled off after replenishing mixing end, thereby finishes whole mixing process.
Above-mentioned formerly applying for a patent exists following subject matter and deficiency:
1, the masterbatch dump temperature is higher, and carbon black is difficult for disperseing when mill is additional mixing, and is easy to oxidation under hot conditions;
2, lack temperature subregion in the banbury variable-speed calendering process, can't accurately control dump temperature at different formulations as the sizing material that whether is added with white carbon and silane coupler, be easy to form the oxidative cleavage of rubber molecule, branching reaction is more, and low-molecular material produces also morely;
3, the mixing cycle of per car sizing material is longer, is unfavorable for the raising of production efficiency;
Dispersion of materials speed such as the Sulfur that 4, adds in mill, promoter, uniformity are lower.
Summary of the invention
The production method of low temperature glue stuff compounding of the present invention is to address the above problem and takes according to the improved new type rubber compounding process of low temperature melting principle high-quality to realize, high efficiency elastomeric compound production new technique.
Goal of the invention is, use that banbury is mixing with low temperature, the low temperature discharge is core, below banbury, dispose many full-automatic mills and under cryogenic conditions, replenish mixing to add sulphur automatically, the low temperature that guarantees whole sizing material production process is mixing, realizes improving elastomeric compound and produces high-quality, high efficiency purpose.
For achieving the above object, the production method of described low temperature glue stuff compounding, only be provided with a banbury that is used for the mixing and discharge of low temperature, below banbury, be connected with one in turn and be used to connect glue cooling and mixing 1# mill, at least 2 to be connected in parallel, to be used for to replenish low temperature mixing and add the mixing mill group of sulphur, and a 8# mill that connects follow-up film cooling production line.
Sizing material is thrown glue in banbury mixing, reach and be discharged to the 1# mill after the technological requirement temperature and smash the glue cooling, be transported to through conveying device again and replenish mixingly in 1 mill in the mill group, replenish sizing material after mixing and be transported to the 8# mill and descend the sheet processing.
After other mills in the mill group receive the sizing material that the 1# mill transports, adopt identical additional mixing and be pooled to the 8# mill successively and descend the sheet processing.
The difference with the prior art part is, in described banbury, load weighted carbon black and other compounding ingredient, rubber except that the finished composition medicine is added in the lump, and is disposable mixing to carry out.
For the sizing material that does not contain white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 130 to 135 ℃; For the sizing material that contains white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 140 to 145 ℃.
As above-mentioned basic scheme, different formulations masterbatch dump temperature is controlled between 125～145 ℃, replenishes in follow-up mill when mixing, and the carbon black that adds in the masterbatch is easy to disperse, avoid taking place high-temperature oxydation, and elastomeric compound intensity is higher.
In addition, such scheme helps shortening the production cycle, only produces rubber master batch and adopt variable-speed calendering and the contrary method of mixing in banbury, and the little medicine of solids such as rubber and little medicine and carbon black adds earlier banbury together.When banbury internal sizes temperature changes, adopt different rotating speeds and the calendering process of time.
Control melting temperature for further enhancing productivity, being convenient to, can take following improvement project:
In described banbury, for containing the sizing material of white carbon and silane coupler in the prescription, after dropping into white carbon and silane coupler, the duration between 140 to 145 ℃ of the control sizing material melting temperatures is 3 minutes.
Distribute for reducing rubber molecule oxidative cleavage problem, branching reaction and molecular weight rubber, with physical properties such as the breaking strength that improves sizing material, wear-resisting and endurances, in described banbury, when melting temperature below 120 ℃ the time, rotor adopts 45rpm above rotating speed, floating weight pressure to be controlled at 0.5Mpa;
When melting temperature reached more than 120 ℃, rotating speed, the floating weight pressure of rotor employing 30 to 35rpm were controlled at 0.3Mpa.
For optimizing the integrated artistic flow process and enhancing productivity, rationally arrange follow-up additional mixing from banbury row different train number sizing materials down, in described 1# mill, adopt the roller of frequency control, the automatic roll adjustment of hydraulic pressure that sizing material is carried out mechanical shearing and cooling processing, and the control processing cycle is within 3 minutes.
Content to sum up, the production method of low temperature glue stuff compounding of the present invention has the following advantages and beneficial effect:
1, realized a kind of low temperature production process for milling of refinement, according to the low temperature melting principle traditional multisection type and one-stage process rubber mixing technique are improved, improved elastomeric compound quality and production efficiency,, directly improved the tire workmanship, reduced cost by reducing the amount of labour and manual intervention.
2, the present invention can be applicable to the production of various tyre stocks, comprises oblique tire, half steel tire, all steel tire and engineering tire.
3, at different sizing compound formulas, it is mixing to have realized that elastomeric compound carries out under cryogenic conditions, and the rubber molecule oxidative cleavage is less, and branching reaction is less, and low-molecular material produces less, the molecular weight rubber narrow distribution.
4, by improving the low temperature mechanical shearing, avoid effectively producing carbon gel in the sizing material mixing process, make the compounding ingredient dispersing uniformity higher, carbon black dispension degree is better.
5, take many parallel mills to distribute, replenish the mixing quantity that can improve reversible machine shearing strand effectively, kept the high-intensity performance of sizing material, improved the breaking strength of sizing material, wear-resisting and fatigue performance.
6, production efficiency is higher, carry out mixing and the low temperature discharge at the high speed banbury, following subsidiary engine configuration many mills in parallel all realize automation, and additional mixing latter stage automatic sulphurization, promoter, the mixing production cycle of whole once-through method is about 18-21 minute.
Description of drawings
Now the present invention is described further in conjunction with the accompanying drawings
Fig. 1 is the schematic flow sheet of existing multisection type production process for milling;
Fig. 2 is the configuration of production method equipment and the process chart of low temperature glue stuff compounding of the present invention.
The specific embodiment
Embodiment 1, and as shown in Figure 2, the production method of described low temperature glue stuff compounding only is provided with a banbury that is used for the mixing and discharge of low temperature, is connected with in turn below banbury:
One is used to connect glue cooling and mixing 1# mill,
6 to be connected in parallel, to be used for to replenish low temperature mixing and add mixing 2# to the 7# mill of sulphur,
A 8# mill that connects follow-up film cooling production line,
Sizing material is thrown glue in banbury mixing, reach and be discharged to the 1# mill after the technological requirement temperature and smash the glue cooling, be transported to through conveying device again and replenish mixingly in the 2# mill in the mill group, replenish sizing material after mixing and be transported to the 8# mill and descend the sheet processing
3# to 7# mill in the mill group receives other train number sizing materials that the 1# mill transports successively, and adopts identical additional calendering process, after 3# to 7# mill is additional mixing also is to be transported to the 8# mill in turn, separately to descend sheet to handle.
The process characteristic of the described production method of present embodiment is:
1, the masterbatch dump temperature is 125～145 ℃, rubber master batch is replenished mixingly in special mill, promotes the dispersion of carbon black, strengthens mechanical shearing, avoids high-temperature oxydation;
2, in banbury, carry out variable-speed calendering, in mill, carry out the additional mixing of displacement, speed change and add vulcanizing system.
3, medicines such as the Sulfur of the adding in mill, promoter adopt the mode of rubber master batch granulations, prevent from that medicine from spilling to disperse, and improve speed and the uniformity that medicine disperses.
4, automaticity height, production line are realized full-automatic production.Carbon black and softening oil are prewired automatically, and automatic charging, is opened the automatically operation etc. of refining, cooling pendulum at banburying, only needs 2 people operation completely.
5, with short production cycle, the efficient height.Be the shortening cycle, banbury is only produced rubber master batch, is used variable-speed calendering and the contrary method of mixing; The little medicine of solids such as rubber and little medicine and carbon black adds banbury earlier together, uses high rotating speed mixing when temperature of charge is not high in banbury, treats temperature rising back variable-speed calendering, is convenient to control melting temperature.Simultaneously, the sizing material dump temperature is lower than traditional rubber mixing technique, within the banbury cycle 3 minutes.In mill, replenish mixing to 95 to 100 ℃ and add the vulcanizing system masterbatch.Open refining and finish the back temperature and reach 50～60 ℃, cooling afterwards pendulum temperature is about 30 ℃.
In the described banbury of present embodiment, load weighted carbon black, oil plant and other compounding ingredient, rubber except that the finished composition medicine are added in the lump, contrary mixing mixing to carry out.
For containing the sizing material of white carbon and silane coupler in the prescription, after dropping into white carbon and silane coupler, the duration between 140 to 145 ℃ of the control sizing material melting temperatures is 3 minutes.
In described banbury, when melting temperature below 120 ℃ the time, rotor adopts 45rpm above rotating speed, floating weight pressure to be controlled at 0.5Mpa;
When melting temperature reached more than 120 ℃, rotating speed, the floating weight pressure of rotor employing 30 to 35rpm were controlled at 0.3Mpa.
The mixing production technology of described low temperature has following steps:
The 1st the step, with load weighted carbon black, oil plant and other compounding ingredient except that the finished composition medicine, rubber add together carry out in the subsidiary engine on the banbury mixing; The variable-speed calendering mode is selected 4 rib NST rotors for use, and rotor speed is controlled between the 6-60rpm; Control floating weight pressure also can be regulated according to sizing compound formula and calendering process below 0.6Mpa; After above-mentioned solid powder is knocked down in the banbury, when melting temperature below 120 ℃ the time, rotor adopts 45rpm above rotating speed, floating weight pressure to be controlled at 0.5Mpa; When melting temperature reached more than 120 ℃, rotating speed, the floating weight pressure of rotor employing 30 to 35rpm were controlled at 0.3Mpa; The softening wet goods oil plant of control is put in the banbury after powder;
For the sizing material that does not contain white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 130 to 135 ℃; For the sizing material that contains white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 140 to 145 ℃;
The 2nd goes on foot, and the sizing material under arranging from banbury is drained into the 1# mill and descends sheet to handle, and is mixing to replenish; Smash glue 3-5 and make sizing material reduce temperature as far as possible back and forth, sizing material is controlled within 3 minutes at the mixing time of 1# mill;
In the 1# mill, adopt the roller of frequency control, the automatic roll adjustment of hydraulic pressure that sizing material is carried out mechanical shearing and handle with cooling, the roller speed ratio is that 1: 1.09 and forward and backward roller are the boring plain-barreled roll;
Be ground into sheet as soon as possible for making, when beginning, adopt fast, big roll spacing refines gluey attitude from banbury row block sizing material down, when whole sizing materials by behind 1-2 mill roll gap, reduction roller rotating speed and roll spacing;
In the 3rd step, sizing material is transported to the 2# mill of mill group from the 1# mill,
Sizing material continues to replenish mixing in this mill, when temperature is reduced to below 100 ℃, replenishes mixing and the cooling procedure end, begins to add the vulcanizing system masterbatch, and the roller speed ratio of this mill is 1: 1.14, and other various technological parameters are identical with the 1# mill; Whole process all need adopt smashes the glue device and smashes glue, and sizing material is controlled between 16-18 minute at the mixing cycle of this mill;
Roll spacing transferred to about 3mm when sizing material was additional mixing, and when beginning to add sulphur, roll spacing transfers to about 3.5mm;
Add the sulphur time (masterbatch begins to contact sizing material and all sneaks in the sizing material to little medicine) after about 1 minute, increase roll spacing again and carry out mixing to about 4.0mm;
After mixing about 7 to 9 minutes, about 6mm is transferred in roll spacing, and sizing material is drained into sheet mill under the 8#.
In the 4th step, sizing material is transported to the 8# mill and descends sheet to handle, and it is mixing to continue cooling in the 8# mill; Adopt forward and backward roller to be the roller of hollow cooling structure, preliminary roller linear velocity 3-30m/min, DC speed regulation 1: 1.09.
The roll adjustment mode is manual roll adjustment, and the roll adjustment scope is 0.5-12mm.
Earlier roll spacing is adjusted between the 5-6mm, after treating that whole sizing materials are all logical and going over roll gap, roll spacing is transferred to carry out mixing operation between the 3-4mm again, roll spacing is adjusted to about 6mm after experiencing 1.5-2.0 minute approximately.
Interleaving agent tank cooling is advanced in the binder removal flow, subsequently film be transported to that film cooling production line is lowered the temperature, air-dry, pendulum and finally be delivered to the storage area, so far refine eventually and finish from a banbury row car sizing material down.
From the sizing material of banbury row other train numbers down, sequentially be delivered in 3# to the 7# mill in parallel by the 1# mill respectively, these 6 mills are proceeded to replenish mixing separately, and sizing material finally is transported to the 8# mill separately and descends the sheet processing.
Because 3# to 7# mill is in parallel with the 2# mill, the equipment configuration of 3# to 7# mill and mixing process and 2# are in full accord.
Claims (5)
1. the production method of a low temperature glue stuff compounding is provided with a banbury that is used for the mixing and discharge of low temperature, below banbury, is connected with in turn,
One is used to connect glue cooling and mixing 1# mill,
At least 2 to be connected in parallel, to be used for to replenish low temperature mixing and add the mixing mill group of sulphur, and,
A 8# mill that connects follow-up film cooling production line,
Sizing material is thrown glue in banbury mixing, reach and be discharged to the 1# mill after the technological requirement temperature and smash the glue cooling, be transported to through conveying device again and replenish mixingly in 1 mill in the mill group, replenish sizing material after mixing and be transported to the 8# mill and descend the sheet processing
After other mills in the mill group receive the sizing material that the 1# mill transports, adopts identical additional mixing and be pooled to the 8# mill successively and descend the sheet processing,
It is characterized in that: in described banbury, load weighted carbon black, oil plant and other compounding ingredient, rubber except that the finished composition medicine are added in the lump, contrary mixing mixing to carry out;
For the sizing material that does not contain white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 130 to 135 ℃;
For the sizing material that contains white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 140 to 145 ℃.
2. the production method of low temperature glue stuff compounding according to claim 1, it is characterized in that: in described banbury, for the sizing material that contains white carbon and silane coupler in the prescription, after dropping into white carbon and silane coupler, the duration between 140 to 145 ℃ of the control sizing material melting temperatures is 3 minutes.
3. the production method of low temperature glue stuff compounding according to claim 1 and 2 is characterized in that: in described banbury, when melting temperature below 120 ℃ the time, rotor adopts 45rpm above rotating speed, floating weight pressure to be controlled at 0.5Mpa;
When melting temperature reached more than 120 ℃, rotating speed, the floating weight pressure of rotor employing 30 to 35rpm were controlled at 0.3Mpa.
4. the production method of low temperature glue stuff compounding according to claim 3, it is characterized in that: in described 1# mill, adopt the roller of frequency control, the automatic roll adjustment of hydraulic pressure that sizing material is carried out mechanical shearing and cooling processing, and the control processing cycle is within 3 minutes.
5. the production method of low temperature glue stuff compounding according to claim 4 is characterized in that: the mixing production technology of described low temperature has following steps,
The 1st the step, with load weighted carbon black, oil plant and other compounding ingredient except that the finished composition medicine, rubber add together carry out in the subsidiary engine on the banbury mixing; The variable-speed calendering mode is selected 4 rib NST rotors for use, and rotor speed is controlled between the 6-60rpm; Control floating weight pressure also can be regulated according to sizing compound formula and calendering process below 0.6Mpa; After above-mentioned solid powder is knocked down in the banbury, when melting temperature below 120 ℃ the time, rotor adopts 45rpm above rotating speed, floating weight pressure to be controlled at 0.5Mpa; When melting temperature reached more than 120 ℃, rotating speed, the floating weight pressure of rotor employing 30 to 35rpm were controlled at 0.3Mpa; The softening wet goods oil plant of control is put in the banbury after powder;
For the sizing material that does not contain white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 130 to 135 ℃; For the sizing material that contains white carbon and silane coupler in the prescription, the dump temperature of control banbury is between 140 to 145 ℃;
The 2nd goes on foot, and the sizing material under arranging from banbury is drained into the 1# mill and descends sheet to handle, and is mixing to replenish; Smash glue 3-5 and make sizing material reduce temperature as far as possible back and forth, sizing material is controlled within 3 minutes at the mixing time of 1# mill;
In the 1# mill, adopt the roller of frequency control, the automatic roll adjustment of hydraulic pressure that sizing material is carried out mechanical shearing and handle with cooling, the roller speed ratio is that 1: 1.09 and forward and backward roller are the boring plain-barreled roll;
Be ground into sheet as soon as possible for making, when beginning, adopt fast, big roll spacing refines gluey attitude from banbury row block sizing material down, when whole sizing materials by behind 1-2 mill roll gap, reduction roller rotating speed and roll spacing;
In the 3rd step, sizing material is transported to the 1st mill of mill group from the 1# mill,
Sizing material continues to replenish mixing in this mill, when temperature is reduced to below 100 ℃, replenishes mixing and the cooling procedure end, begins to add the vulcanizing system masterbatch, and the roller speed ratio of this mill is 1: 1.14, and other various technological parameters are identical with the 1# mill; Whole process all need adopt smashes the glue device and smashes glue, and sizing material is controlled between 16-18 minute at the mixing cycle of this mill;
In the 4th step, sizing material is transported to the 8# mill and descends sheet to handle, and it is mixing to continue cooling in the 8# mill; Adopt forward and backward roller to be the roller of hollow cooling structure, earlier roll spacing is adjusted between the 5-6mm, after treating that whole sizing materials are all logical and going over roll gap, roll spacing is transferred to carry out mixing operation between the 3-4mm again, roll spacing is adjusted to about 6mm after experiencing 1.5-2.0 minute approximately;
Interleaving agent tank cooling is advanced in the binder removal flow, subsequently film be transported to that film cooling production line is lowered the temperature, air-dry, pendulum and finally be delivered to the storage area, so far refine eventually and finish from a banbury row car sizing material down.
The sizing material of other train numbers under the banbury row, sequentially be delivered in other mills in parallel by the 1# mill respectively, mill in parallel is proceeded to replenish mixing separately, and the sizing material of different train numbers finally is transported to the 8# mill separately and descends sheet to handle.
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