WO2006043535A1 - ゴム材料の混練装置および混練方法 - Google Patents
ゴム材料の混練装置および混練方法 Download PDFInfo
- Publication number
- WO2006043535A1 WO2006043535A1 PCT/JP2005/019097 JP2005019097W WO2006043535A1 WO 2006043535 A1 WO2006043535 A1 WO 2006043535A1 JP 2005019097 W JP2005019097 W JP 2005019097W WO 2006043535 A1 WO2006043535 A1 WO 2006043535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- kneading
- rubber
- roll
- kneaded
- kneader
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 211
- 239000005060 rubber Substances 0.000 title claims abstract description 211
- 239000000463 material Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002156 mixing Methods 0.000 title abstract description 13
- 238000013329 compounding Methods 0.000 claims abstract description 22
- 238000004898 kneading Methods 0.000 claims description 214
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 3
- 230000003252 repetitive effect Effects 0.000 claims 1
- 238000004073 vulcanization Methods 0.000 abstract description 4
- 239000004615 ingredient Substances 0.000 abstract 3
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 9
- 238000010008 shearing Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- AMGNHZVUZWILSB-UHFFFAOYSA-N 1,2-bis(2-chloroethylsulfanyl)ethane Chemical compound ClCCSCCSCCCl AMGNHZVUZWILSB-UHFFFAOYSA-N 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002801 charged material Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
- B29B7/56—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
- B29B7/568—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set with consecutive sets of rollers or a train of rollers
-
- 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
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
- B29B7/56—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
- B29B7/566—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set provided with means to take material away from a set of rollers and to reconduct it to the same set; provided with endless belts, e.g. which can be in or out of cooperation with at least one of the rollers
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/724—Measuring, controlling or regulating for continuous roller mixers, e.g. calenders
-
- 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
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/726—Measuring properties of mixture, e.g. temperature or density
-
- 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
- B29B7/7461—Combinations of dissimilar mixers
-
- 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
- B29B7/7466—Combinations of similar mixers
-
- 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
- B29B7/748—Plants
-
- 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
-
- 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
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
-
- 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
Definitions
- the present invention relates to a rubber material kneading apparatus and a kneading method, and more specifically, kneading with excellent productivity for general purposes regardless of the amount of rubber material, the type of compounding agent, and the compounding ratio.
- the present invention relates to a kneading apparatus for a rubber material and a kneading method for obtaining a kneaded rubber having a stable viscosity by using this kneading apparatus.
- a rubber material before vulcanization used as a material for a rubber product such as a tire is made of a raw rubber such as natural rubber and a compounding agent such as carbon black in a closed kneader called a Banbury mixer. It was necessary to add a predetermined amount and knead. By this kneading, it was necessary to uniformly mix the charged materials and to obtain a kneaded rubber having a constant viscosity.
- the kneaded rubber excessively rises in temperature by the time it reaches the target viscosity due to heat generated by friction during kneading, leading to a decrease in quality. Therefore, it has been difficult to achieve the target viscosity of the kneaded rubber by only one kneading operation due to the upper temperature limit. For this reason, it was necessary to cool the kneaded rubber once taken out from the closed kneading machine and then re-inject it to repeat the kneading operation a plurality of times. As a result, a great deal of energy was wasted and productivity was reduced.
- the kneader for kneading the raw rubber and the non-vulcanized compounding agent and the final kneader for adding and kneading the vulcanized compounding agent have been separated. Therefore, the first mixing Kneader power The intermediate cooling time until the discharged kneaded rubber is put into the final kneader is not constant, and it is difficult to obtain a kneaded rubber with stable quality.
- Patent Document 1 Japanese Unexamined Patent Publication No. 63-56407
- Patent Document 2 Japanese Patent No. 2936348
- the main object of the present invention is to provide a rubber material kneading apparatus excellent in productivity that can be kneaded in general regardless of the amount of rubber material, the kind of compounding agent, and the blending ratio. There is.
- Another object of the present invention is to stabilize the viscosity of the kneaded rubber without variation under the kneading conditions of the same batch when kneading the rubber material using the kneading apparatus. It is an object of the present invention to provide a rubber material kneading method that can achieve stable quality without variation.
- the rubber material kneading apparatus of the present invention is a kneading system in which at least two open-type roll kneaders each having a pair of kneading rolls, a reversing compressor, and a delivery competitor are connected in series.
- One closed-type kneader for kneading the rubber material and the non-vulcanized compounding agent is arranged upstream of the kneading line group in which at least two lines are arranged side by side, and on the downstream side of the kneading line group, One final kneader for kneading the intermediate kneaded rubber discharged from the kneading line group and the vulcanizing compound, and a measuring means between the closed kneader and the kneading line group; Distributing means for selectively transferring the pre-kneaded rubber weighed by the measuring means to at least one kneading line of the kneading line group is arranged, and between the kneading line group and the final kneader.
- Intermediate kneading A conveying means for conveying the rubber to the final kneader is arranged.
- This kneading apparatus includes a kneading line group in which at least two open-type kneading machines are connected in series, and at least two rows of kneading lines are juxtaposed, so that after being discharged from the closed kneading machine
- the pre-kneaded rubber weighed by the weighing means can be supplied to a kneading line selected from a plurality of kneading lines by the sorting means according to the kneading conditions such as the amount and kneading time.
- the final kneaded rubber can be obtained with high productivity in accordance with the kneading conditions.
- the rubber material kneading method of the present invention uses the above-described kneading apparatus to preliminarily knead the rubber material and the non-vulcanized compounding agent with the above-mentioned closed-type kneader.
- the pre-kneaded rubber discharged from the kneader is set so that the roll gap of the pair of kneading rolls is 0.5 mm to 3. Omm, and the temperature of the kneaded rubber is 40 ° C to It is characterized by being kneaded while controlling at 90 ° C.
- the kneading rubber is kneaded while simultaneously controlling the roll gap and the temperature of the kneading rubber within the above-mentioned range, whereby the kneading rubber is given sufficient shearing force to rapidly reduce the viscosity and vary. It is possible to obtain an intermediate kneaded rubber having a stable target viscosity without any problems. As a result, not only the kneading conditions of the same batch but also the viscosity of the final kneaded rubber becomes uniform and uniform even between a plurality of batches.
- the rubber material and the non-vulcanized compounding agent are preliminarily kneaded with the above-described closed kneader using the above-described kneading apparatus,
- the temperature of the pre-kneaded rubber when the pre-kneaded rubber discharged from the closed-type kneader is discharged to the first roll kneader of the kneading line from the closed kneader is set to 90 ° C or higher, and the first roll
- the temperature of the kneaded rubber when discharged from the kneader to the second roll kneader is controlled to 60 ° C to 80 ° C.
- the temperature of the pre-kneaded rubber when it is put into the first roll kneader is set to 90 ° C or higher. It is sufficient to put it in as it is without the need for special cooling before putting it into the container. Therefore, pretreatment time and energy loss can be minimized.
- the temperature of the kneaded rubber when discharged to the second roll kneader should be 60 ° C ⁇ 80 ° C! The viscosity can be lowered quickly by giving. As a result, an intermediate kneaded rubber having a stable target viscosity with no variation can be obtained, and the final kneaded rubber also has a stable quality.
- FIG. 1 is a schematic configuration diagram illustrating a rubber material kneading apparatus according to the present invention.
- FIG. 2 is a schematic plan view of FIG.
- FIG. 3 is a view taken along the line XX in FIG.
- FIG. 4 is an explanatory view illustrating the outline of a roll kneader constituting a kneading line.
- FIG. 5 is a control flow diagram showing an example of a rubber material kneading method of the present invention.
- FIG. 6 is a graph showing an example of a control process by the rubber material kneading method of the present invention.
- FIG. 7 is a graph showing the control range of the rubber temperature and the roll gap in the rubber material kneading method of the present invention.
- FIG. 8 is a graph showing the relationship between kneading time and rubber temperature in a roll kneader.
- FIG. 9 is a graph showing the relationship between kneading time and power level in a roll kneader.
- FIG. 10 is a graph showing the relationship between the estimated viscosity index and the actually measured final viscosity.
- FIG. 11 is an explanatory view illustrating an outline of a modified example of a roll kneader.
- FIG. 12 is an explanatory diagram illustrating a method for enlarging the main part of FIG. 11 and estimating the bank amount.
- FIG. 13 is a graph showing the relationship between the amount of banks and the number of roll passes in a roll kneader and a decrease in viscosity.
- a raw rubber such as natural rubber and a non-carbon rubber such as carbon black are provided on one side of a closed kneader 1 called a Banbury mixer.
- a raw material metering device 2 for metering and supplying the vulcanizing compound is connected on one side of a closed kneader 1.
- the sheeting roll 3 includes a pair of kneading rolls rotating in opposite directions, and allows the rubber W to be kneaded to pass between the rolls.
- a supply conveyor 4 is disposed at the discharge portion of the sheeting roll 3, and a distribution compressor 5 is disposed on the discharge side of the supply conveyor 4 via a cutter device 5a and a weighing conveyor 5b. ing.
- a distribution compressor 5 is disposed on the discharge side of the supply conveyor 4 via a cutter device 5a and a weighing conveyor 5b.
- two rows of kneading lines 6A and 6B are arranged to be connected in parallel.
- the sorter 5 can be moved back and forth between the kneading lines 6A and 6B.
- Each of the kneading lines 6A and 6B is composed of two roll kneaders 6a and 6b, 7a and 7b connected in series in a direction orthogonal to the sorting competitor 5.
- the number of roll kneaders connected in series is not limited to two.
- the number of kneading lines 6 A and 6B arranged in parallel is not limited to two.
- Roll kneaders 6a, 6b, 7a, 7b are opposed kneading rolls rotating in opposite directions to each other. 8 has an open structure. Furthermore, a kneading roll 9 is provided that forms a circulation path from the lower side to the upper side of the kneading roll 8, and a delivery conveyor 10 is rotatably connected to one end of the kneading roll 9.
- the rubber W to be kneaded that passes through the kneading roll 8 is circulated by the kneading compressor 9 and repeatedly supplied continuously to the kneading roll 8 for kneading. Is done.
- the other end portion of the delivery conveyor 10 is lowered, the rubber W to be kneaded is conveyed to the next step by the delivery conveyor 10.
- an intermediate conveyance compressor 18 is connected in an orthogonal direction.
- a final kneader 21 equipped with a vulcanizing compounding agent Q charging device 20 is connected to a carry-out end portion of the intermediate conveyance compressor 18 via a supply compressor 19.
- the final kneader 21 is an open-type roll kneader equipped with a pair of kneading rolls 25, a kneading conveyor 22 and a delivery competitor 23.
- a final unloading compressor 24 is connected to the discharge portion of the final kneading machine 21 in an orthogonal direction.
- a sheeting roll 26 On the unloading side of the final unloading compressor 24, a sheeting roll 26, an unloading compressor 27, a sampling device 28 and Product stock process 30 is connected via cooling device 29
- the pre-kneaded rubber W is the rubber at the stage before the kneading is completed in the kneading lines 6A and 6B from the closed kneader 1.
- the kneading lines 6A and 6B finish kneading, and the rubber before the kneading is finished in the final kneading machine 21 is the intermediate kneading rubber W, and the rubber after the kneading is finished in the final kneading machine 21 is the final kneading rubber Wa. To do.
- the raw material metering device 2 measures the raw rubber such as natural rubber and the non-powered sulfur compounding agent such as carbon black, and then puts them into the closed kneading machine 1 to uniformly knead and reserve. Kneaded rubber W.
- This pre-kneaded rubber W still has a high viscosity and is easy to cut, so it is not easy to handle. Therefore, the pre-kneaded rubber W is kneaded in the kneading lines 6A and 6B in the subsequent steps, and the viscosity is lowered to the target viscosity to obtain the intermediate kneaded rubber W.
- the pre-kneaded rubber W is kneaded by the sheeting roll 3 so as to be at a constant temperature or lower, and is conveyed to the supply compressor 4 in the form of a sheet. After that, the pre-kneaded rubber W The material is transferred from the barrier 4 to the weighing competitor 5b through the cutter device 5a.
- the pre-kneaded rubber W is weighed and kneaded in one kneading line 6A and kneaded in two kneading lines 6A and 6B according to the kneading conditions such as the amount and kneading time. Whether to do is selected.
- the pre-kneading rubber W on the weighing competitor 5b is directly supplied to one kneading line 6A.
- the pre-kneading rubber W is equally divided by the cutter device 5a, and a time difference is provided between the weighing conveyor 5b and the sorting compressor 5, so that each Supply to kneading lines 6A and 6B.
- the sorting competitor 5 moves toward the kneading line 6B.
- the pre-kneading rubber W divided by the cutter device 5a at a predetermined ratio is sequentially supplied to the kneading lines 6A and 6B, etc. .
- Each pre-kneaded rubber W supplied to the kneading lines 6A and 6B is repeatedly kneaded by the first roll kneaders 6a and 7a, and then the second roll kneaders 6b and 7b. And repeatedly kneaded.
- the first roll kneaders 6a and 7a and the second roll kneaders 6b and 7b are kneaded while sequentially controlling the rubber temperature T to be lowered by about 10 ° C. A detailed kneading method will be described later.
- each of the intermediate kneaded rubbers W having reached the target viscosity is transferred onto the intermediate conveying compressor 18 arranged in a direction orthogonal to the kneading lines 6A, 6B by the kneading lines 6A, 6B.
- each intermediate kneaded rubber W is supplied from the intermediate conveying compressor 18 to the final kneader 21 via the supply compressor 19 and collected.
- the vulcanized compounding agent Q force metering device 20 weighed at a certain ratio is charged and mixed with the intermediate kneaded rubber W. Is done.
- the final kneaded rubber Wa that has been uniformly kneaded by adding the vulcanizing compounding agent Q is discharged to the final carry-out compressor 24 by the delivery compressor 23.
- the final kneaded rubber Wa unloaded by the final unloading competitor 24 is supplied to the product stock process 30 via the sheeting roll 26, unloading conveyor 27, sampling device 28, and cooling device 29.
- the sampling device 28 the final kneaded rubber Wa is sampled and checked for quality. Quality final kneaded rubber Wa is stocked in product stock process 30.
- a series of steps from the addition of a rubber material or the like to the final kneading rubber Wa can be performed continuously at a time. Further, depending on the weight of the material kneaded in the closed kneader 1, that is, the amount of the pre-kneaded rubber W, the type of the compounding agent, the blending ratio, the kneading time, etc., the pre-kneaded rubber W is a predetermined ratio. Each kneaded rubber W can be kneaded to the target viscosity by kneading lines 6A and 7A. In this way, the intermediate kneaded rubber W and, in turn, the final kneaded rubber Wa can be obtained by kneading with excellent productivity in general for various kneading conditions.
- the roll kneader 6 shown in FIG. 4 can be used as the roll kneaders 6a, 6b, 7a, 7b constituting the kneading lines 6A, 6B.
- This roll kneader 6 has a pair of kneading rolls 8 that are rotationally driven by electric motors 12 in directions opposite to each other.
- the roll kneading machine 6 includes a reversing conveyor 9 and a delivery competitor 10, and the basic structure has been described above. Same as roll kneaders 6a, 6b, 7a, 7b.
- One roll 8 is provided with an actuator 13, and this roll 8 is moved so that the gap between the rolls (roll gap h) can be adjusted! /.
- a roll gap sensor 15 is arranged below the kneading roll 8.
- a temperature sensor 14 that detects the temperature of the pre-kneaded rubber W that has passed through the kneading roll 8 and a cooling fan 11 that cools the pre-kneaded rubber W are arranged.
- the electric power level P drive torque
- roll surface speed V roll gap h
- rubber temperature T of the electric motor 12 are transmitted to the arithmetic unit 16.
- the pre-kneaded rubber W supplied by the sorting conveyor 5 is put into the first roll kneaders 6a and 7a in a state where the rubber temperature T force is 0 ° C. or more.
- the temperature T of the pre-kneaded rubber W discharged from the closed kneader 1 is approximately in the range of 90 ° C to 170 ° C.
- the rubber temperature T when kneaded and discharged by the roll kneaders 6a and 7a is controlled to 60 ° C or higher and 80 ° C or lower.
- the pre-kneaded rubber W discharged from the closed kneader 1 may be added as it is without the need for special cooling before it is introduced into the first roll kneaders 6a and 7a. Accordingly, it is possible to minimize the pretreatment time and energy loss for charging into the roll kneaders 6a and 7a.
- the temperature T of the pre-kneaded rubber W is in the range of 60 ° C to 80 ° C, which is effective for reducing the viscosity, and the temperature change is reduced, so the rubber temperature T is easily controlled and sufficient. Viscosity can be rapidly reduced by applying a shearing force.
- this roll kneader 6 is used as a first kneading machine 6a, 7a and a second roll kneading machine 6b, 6b connected in series by kneading lines 6A, 6B provided side by side, Knead as follows.
- the pre-kneaded rubber W discharged from the closed kneader 1 and distributed by the distribution conveyor 5 is used for the first roll kneader 6a with the rubber temperature T being 90 ° C or higher. , 7a.
- the rubber temperature T when kneaded and discharged by the first roll kneaders 6a and 7a is controlled to 60 ° C or higher and 80 ° C or lower.
- the pre-kneaded rubber W is put into the second roll kneaders 6b and 7b by the delivery competitor 10 while maintaining the temperature state.
- the rubber temperature T force at which the pre-kneaded rubber W is kneaded and the force is discharged is controlled to be 0 ° C or higher and 75 ° C or lower.
- the two roll kneaders 6a and 6b in series and 7a and 7b continuously knead the rubber temperature T gradually and knead in a temperature range effective for viscosity reduction, so that sufficient shearing is achieved.
- the intermediate kneaded rubber W having the target viscosity can be obtained by applying a force and rapidly reducing the viscosity.
- the viscosity reduction of the pre-kneaded rubber W can be further promoted by setting the roll gap h of the roll kneaders 6a, 6b, 7a, 7b to 0.5 mm or more and 3. Om m or less.
- the rubber temperature T and the driving torque of the kneading roll 8 are controlled.
- the viscosity is estimated and calculated over time based on the viscosity, roll gap h, and roll surface speed V, and kneaded while controlling so that the estimated viscosity becomes the target viscosity in a given time.
- the calculation formula used for estimating the rubber viscosity in the course of the kneading operation is not particularly limited, but the following formula (1) can be exemplified.
- Viscosity index (reference temperature is 100 ° C and shear rate is 2 [lZs]
- FIG. 5 illustrates this control flow, which will be described with reference to this figure.
- the target viscosity at that time set in advance and the estimated viscosity are compared, and if the estimated viscosity is within the allowable range of the target viscosity, the kneading is continued without changing the kneading conditions. If the estimated viscosity is higher than the target viscosity, the rubber temperature T is decreased by increasing the number of cooling fans 11 to be operated, increasing the fan rotation speed, etc. to reduce the rubber temperature T, thereby promoting the viscosity decrease. The roll gap h is reduced to promote viscosity reduction.
- the estimated viscosity is lower than the target viscosity, reduce the number of cooling fans 11 to operate, slow down the fan rotation speed, etc. To reduce the viscosity.
- the roll gap h can be increased to suppress the decrease in viscosity.
- the cooling means for the rubber temperature T is not limited to the cooling fan 11, and heat may be exchanged by circulating a fluid inside the kneading roll 8.
- the kneading time can be adjusted by controlling and changing the roll surface speed V.
- This control is repeatedly carried out by appropriately determining the number of times within a predetermined kneading time. Then, when the target viscosity is reached within a predetermined kneading time, the control is terminated as indicated by the dotted line.
- This control process is illustrated in Fig. 6.
- the viscosity E estimated during the measurement of T1 to T4 gradually approaches the target viscosity G set in advance by this control, and the target viscosity r? F reaches the predetermined kneading time Tf. It can be.
- Fig. 8 and Fig. 9 examples of estimated values of the rubber temperature T and the power level P obtained in a monotonically decreasing function form are displayed together with measured values and moving average values of the measured values every minute.
- the dotted line that fluctuates up and down is the measured value
- the solid line that fluctuates up and down is the moving average value per minute
- the solid straight line is the estimated value. It can be seen that the estimated value obtained with the monotonically decreasing function form and the moving average value per minute change more stably than the measured value, and in particular, the estimated value obtained with the monotonically decreasing function form is more stable.
- Fig. 10 shows the final viscosity index ( ⁇ ) when the estimated viscosity is calculated and controlled based on the estimated values of the rubber temperature T and the power level P obtained in a monotonically decreasing function form, and the final measured value.
- the relationship is closer to the actually measured viscosity, and it can be seen that an intermediate kneaded rubber W having a stable viscosity with little viscosity variation from batch to batch can be obtained.
- This makes it possible to obtain an intermediate kneaded rubber W having a stable target viscosity with little variation in viscosity during a predetermined time.
- FIG. 11 illustrates a modified example of the roll kneader 6 shown in FIG.
- This roll kneading machine 7 is obtained by adding a bank amount sensor 17 to the roll kneading machine 6, and the other structures are the same, so that they are illustrated in a simplified manner.
- the shearing force applied to the pre-kneaded rubber W by the kneading roll 8 changes depending on the so-called bank amount B of the pre-kneaded rubber W staying on the kneading roll 8 during kneading. If the bank amount B is large, a wider state force is pushed into the narrow gap of the kneading roll 8, so that the shearing force increases and the viscosity decreases. Therefore, the pre-kneaded rubber W being kneaded varies in viscosity due to the difference in bank amount B.
- a bank amount sensor 17 is provided in order to suppress such a variation in viscosity.
- the bank amount sensor 17 detects the bank amount B using an infrared camera or an optical sensor.
- the top surface force of the kneading roll 8 also detects the height H to the top surface of the pre-kneaded rubber W on the kneading roll 8, and the detected data is connected to the bank amount sensor 17. Input to the arithmetic unit 16 and process the data to estimate the bank amount B.
- a line segment CL in the figure is a center line that is intermediate between the pair of kneading rolls 8.
- the bank amount sensor 17 detects the height H from the top surface of the kneading roll 8 to the top surface of the pre-kneading rubber W on the kneading roll 8, and the horizontal line from the top surface of the kneading roll 8 to the height H is detected. Calculate the intersection C with the center line CL, and calculate the area of the circle that touches the surface of both rolls 8 through the intersection C. Then, the length of the pre-kneaded rubber W in the roll width direction of the kneading roll 8 is determined by the bank amount sensor 17. Alternatively, it is detected by another means, and the volume of the cylinder is obtained by multiplying the calculated area of the circle and the length of the pre-kneaded rubber w in the roll width direction, and this is defined as the bank amount B.
- the bank amount B can be estimated by the computing device 16 in real time.
- the estimation of the bank amount B is not limited to this, and may be approximated by another method.
- the bank amount B is controlled to decrease. In order to reduce the bank amount B, lower the conveyor conveyance speed CV of the delivery competitor 10 and the turnover compressor 9 or increase the height position of the turnover compressor 9 to extend the circulation path of the pre-kneaded rubber W. That's fine.
- the viscosity index is an index relative to the reference viscosity. The larger the index, the higher the viscosity, and the viscosity index before roll kneading (the number of roll passes is 0) is 10.
- the viscosity control by the roll kneader 6a the viscosity is estimated and calculated over time based on the rubber temperature T, the driving torque p of the kneading roll 8, the roll gap h, the roll surface speed V, and the bank amount B. Kneading while controlling so that the estimated viscosity becomes the target viscosity over time.
- a calculation formula used for estimating the rubber viscosity in the kneading operation process for example, The following equation (2), in which the item of bank amount B is added to equation (1), can be exemplified.
- the bank amount B is detected by the bank amount sensor 17.
- the bank amount sensor 17 by controlling the increase / decrease of the bank amount B based on the detected data, it is possible to obtain the intermediate kneaded rubber W having a predetermined viscosity that is more accurate and stable.
- the final blended rubber Wa also has a uniform quality with a stable viscosity.
- the rubber material kneading apparatus and the kneading method described above can be effectively used when producing rubber products such as tires.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2005800355883A CN101043994B (zh) | 2004-10-19 | 2005-10-18 | 橡胶材料的混炼装置以及混炼方法 |
US11/664,644 US20090238027A1 (en) | 2004-10-19 | 2005-10-18 | Apparatus for and Method of Kneading Rubber Material |
DE112005002546T DE112005002546T5 (de) | 2004-10-19 | 2005-10-18 | Vorrichtung und Verfahren zum Kneten von Gummimaterial |
Applications Claiming Priority (6)
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JP2004304153A JP3837424B2 (ja) | 2004-10-19 | 2004-10-19 | ゴム材料の混練り方法及びその装置 |
JP2004-304149 | 2004-10-19 | ||
JP2004-304153 | 2004-10-19 | ||
JP2004304149 | 2004-10-19 | ||
JP2005-097628 | 2005-03-30 | ||
JP2005097628A JP4223022B2 (ja) | 2004-10-19 | 2005-03-30 | ゴム材料の混練制御方法 |
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WO2006043535A1 true WO2006043535A1 (ja) | 2006-04-27 |
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PCT/JP2005/019097 WO2006043535A1 (ja) | 2004-10-19 | 2005-10-18 | ゴム材料の混練装置および混練方法 |
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US (1) | US20090238027A1 (ja) |
DE (1) | DE112005002546T5 (ja) |
WO (1) | WO2006043535A1 (ja) |
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CN100398287C (zh) * | 2006-12-25 | 2008-07-02 | 三角轮胎股份有限公司 | 辅机并联式一段法炼胶方法 |
US20090162476A1 (en) * | 2007-12-21 | 2009-06-25 | Cadbury Adams Usa Llc | Parallel Gum Component Mixing Systems And Methods |
CN102626962A (zh) * | 2012-04-24 | 2012-08-08 | 金宇轮胎集团 | 一种橡胶连续混炼系统装置 |
US10973238B2 (en) | 2011-03-11 | 2021-04-13 | Intercontinental Great Brands Llc | System and method of forming multilayer confectionery |
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FR2975034B1 (fr) | 2011-05-13 | 2014-03-14 | Michelin Soc Tech | Procede de realisation d'une gomme pour pneumatique comprenant une etape de malaxage |
EP3536161A1 (en) | 2011-07-21 | 2019-09-11 | Intercontinental Great Brands LLC | Advanced gum forming and cooling |
CN103496046B (zh) * | 2013-10-11 | 2015-11-25 | 山东金宇轮胎有限公司 | 用于控制开炼机运行的运行方法、开炼机和炼胶系统 |
EP3131405A1 (en) | 2014-03-03 | 2017-02-22 | Intercontinental Great Brands LLC | Method for manufacturing a comestible |
FR3044949A1 (fr) * | 2015-12-15 | 2017-06-16 | Michelin & Cie | Fabrication de melange de caoutchouc |
FR3051704A1 (fr) * | 2016-05-27 | 2017-12-01 | Michelin & Cie | Fabrication de melanges de caoutchouc |
FR3051702A1 (fr) * | 2016-05-27 | 2017-12-01 | Michelin & Cie | Fabrication de melanges de caoutchouc |
FR3051703A1 (fr) * | 2016-05-27 | 2017-12-01 | Michelin & Cie | Fabrication de melanges de caoutchouc |
JP6972534B2 (ja) * | 2016-10-31 | 2021-11-24 | 住友ゴム工業株式会社 | 混練機投入用ポリマー |
FR3061671B1 (fr) * | 2017-01-06 | 2021-06-04 | Michelin & Cie | Fabrication de melange de caoutchouc |
FR3064939B1 (fr) * | 2017-04-07 | 2022-05-20 | Michelin & Cie | Fabrication de melange de caoutchouc |
FR3065900A1 (fr) * | 2017-05-03 | 2018-11-09 | Compagnie Generale Des Etablissements Michelin | Fabrication de melange de caoutchouc |
CN111195994B (zh) * | 2020-01-09 | 2021-09-21 | 浦林成山(青岛)工业研究设计有限公司 | 一种终炼串联均化炼胶工艺及系统 |
CN114872217B (zh) * | 2022-05-19 | 2024-03-22 | 南通福斯特机械制造有限公司 | 一种捏合机模块化连续腔室 |
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Also Published As
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US20090238027A1 (en) | 2009-09-24 |
DE112005002546T5 (de) | 2007-09-06 |
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